JP5467687B2 - Rear upper structure of the vehicle - Google Patents

Description

  The present invention provides a vehicle body of a vehicle in which a window opening that is normally closed by a wind glass is formed in a side wall of the rear part of the vehicle body, and a shoulder anchor that holds a seat belt is attached to a rear pillar that is a part of the side wall behind the window opening. This relates to the rear superstructure.

  Conventionally, there is a vehicle body rear upper structure of the vehicle described in Patent Document 1 below. According to this publication, the rear upper part of the vehicle body has an outer panel and an inner panel that are joined to each other, and the left and right side walls having a closed cross-section structure in which each section in the vertical direction is hollow, and these left and right side walls. And a roof panel erected on each upper edge. A space surrounded by the rear edge portions of the left and right side walls and the roof panel is a back door opening. A side door opening and a window opening are formed on the side wall so as to be arranged in the front-rear direction, and a wind glass is provided that is fixed to the opening edge of the window opening and closes the window opening.

  A portion of the side wall between the side door opening and the window opening is an intermediate pillar, while a portion between the back door opening and the window opening is a rear pillar, and the rear pillar is halfway in the vertical direction. A shoulder anchor for securing the seat belt is fixed to the inner panel portion of the portion.

  When the vehicle travels, a seated person who is seated on a seat inside the vehicle body is normally restrained by the seat belt. When the vehicle collides with a certain object located in front of the vehicle while traveling forward (front collision), the seat occupant tries to move forward from the seat side due to the inertial force. The seat pillar and the shoulder anchor that holds the seat belt are mainly supported by the rear pillar, and the forward movement of the seated person from the seat side is prevented. In other words, the seated person at the time of the front collision is held and protected while being restrained on the seat by the seat belt.

Japanese Patent Application No. 2006-103436

  By the way, in the above-described prior art rear body upper structure of the prior art, there is a possibility that the following problem in strength may occur at the time of a front collision. Therefore, the above-mentioned problem will be described with reference to FIG.

  First, in FIG. 5 (a), the intermediate pillar 28 'in the prior art needs to strongly resist the impact force from the side door when opening and closing the side door opening 16', and It is also necessary to firmly support the side door with the side door opening 16 'closed. For this reason, the intermediate part pillar 28 'is generally increased in strength and rigidity (hereinafter simply referred to as strength) and is used as a skeleton member of the vehicle body 2'. In addition, the outer edge of the rear header 24 'formed by the rear edge of the roof panel 8' and the upper edge of the side wall 7 'are supported to support the side edge of the roof panel 8'. The three-pronged portion 32 ′ where the rear end portion of the roof side rail 26 ′ and the upper end portion of the rear pillar 29 ′ gather tends to increase in strength as the three members described above reinforce each other. is there.

  However, on the other hand, the window opening 18 'is for fixing the window glass to the edge of the opening, that is, a normally closed type. For this reason, the strength of the opening edge portion of the window opening 18 'is usually set lower than that of the open / close type. For this reason, the strength of the rear pillar 29 ′ in which the front edge is formed by the opening edge of the window opening 18 ′ tends to decrease.

  Therefore, the strength of the front corner portion 58 ′ which is a transition portion from the intermediate pillar 28 ′ to the window opening 18 ′ in the front-rear direction of the vehicle body 2 ′ and forms the front upper portion of the opening edge of the window opening 18 ′. Tends to be relatively lower than the intermediate pillars 28 'and the three-pronged portions 32'. Therefore, as described above, when the inertial force of the seated person is excessive at the time of the front collision, the above-described seat belt and shoulder anchor 44 'are attached to the fixing portion of the shoulder anchor 44' in the rear pillar 29 '. When the inertial force F ′ is applied, a large stress concentration tends to occur in the front corner portion 58 ′ due to the inertial force F ′. As a first point, one point in FIG. As indicated by a chain line, the side wall 7 ′ may be largely bent A ′ so as to have a convex shape toward the outer side of the vehicle body 2 ′ with the front corner portion 58 ′ as an apex.

  As a second point, according to the inertial force F ′, stress concentration tends to occur at the front corner portion 58 ′ as described above, and the shoulder anchor 44 ′ is fixed to the rear pillar 29 ′. As shown in FIG. 5 (c) in the side view of the vehicle body, the rear pillar 29 'has the fixed portion of the shoulder anchor 44' as the apex. A large bend B ′ is formed so as to form a convex shape toward the front of the vehicle body 2 ′, and in conjunction with the bend B ′ of the rear pillar 29 ′, as shown by a dashed line in FIG. 5 (d). As a result, the upper edge of the opening edge of the window opening 18 'may be bent C' so as to rotate downward about the front corner 58 '.

  When the above-described bends A ′ to C ′ are generated, the shoulder anchor 44 ′ for hooking the seat belt is greatly displaced toward the front by the bends A ′ to C ′, The seat belt is unnecessarily greatly loosened. As a result, the seat belt restraint performance of the seat belt is lowered.

  The present invention has been made paying attention to the above-described circumstances, and the object of the present invention is to prevent the above-mentioned problem due to a frontal collision when the vehicle travels in which a seated person is restrained via a seat belt and a shoulder anchor on the seat. Even if the inertia force of the seat occupant applied to the rear pillar via the shoulder anchor or the like is excessive, the restraint performance of the seat occupant by the seat belt is maintained well.

The invention of claim 1 includes the left and right side walls 7 having outer and inner panels 11 and 12 joined to each other and having a closed cross-sectional structure with hollow sections in the vertical direction, and the left and right side walls 7. A roof panel 8 installed on each upper edge, and a space surrounded by the rear edge of each of the left and right walls 7 and the roof panel 8 serves as a back door opening 14. An opening 16 and a window opening 18 are formed side by side, and a window glass 20 is provided that is fixed to the opening edge of the window opening 18 and closes the window opening 18. The side door opening 16 and the window opening on the side wall 7 are provided. 18 is an intermediate pillar 28, while the portion between the back door opening 14 and the window opening 18 is a rear pillar 29. That the vehicle body after the superstructure of the vehicle which is fixed a shoulder anchor 44 for latching the seat belt 42 in the portion of the inner panel 12,
The vehicle body rear upper structure of the vehicle is characterized in that a weakened portion 50 is formed in a portion of the inner panel 12 in the vicinity of the rear corner portion 49 that forms the rear upper portion of the opening edge portion of the window opening 18.

  According to a second aspect of the present invention, the fragile portion 50 is formed in a groove shape, and includes an outer end portion of the rear header 24 formed by a rear end edge portion of the roof panel 8 and an upper edge portion of the side wall 7. The fragile portion 50 faces the rear end of the window opening 18 toward the trifurcated portion 32 where the rear end portion of the roof side rail 26 that supports the side edge portion of the panel 8 and the upper end portion of the rear pillar 29 gather. The vehicle body rear upper structure according to claim 1, wherein the vehicle body rear upper structure is formed to extend from a corner portion 49 side.

  The invention according to claim 3 is the vehicle body rear upper structure according to claim 1, wherein a strength improving portion 54 is formed in a portion of the inner panel 12 in the vicinity of the front of the fragile portion 50.

  According to a fourth aspect of the present invention, the first to third aspects of the present invention are combined with the fifth aspect of the present invention.

The invention of claim 5 includes the left and right side walls 7 having outer and inner panels 11 and 12 joined to each other and having a closed cross-sectional structure in which each section in the vertical direction is hollow, and the left and right side walls 7. A roof panel 8 installed on each upper edge, and a space surrounded by the rear edge of each of the left and right walls 7 and the roof panel 8 serves as a back door opening 14. An opening 16 and a window opening 18 are formed side by side, and a window glass 20 is provided that is fixed to the opening edge of the window opening 18 and closes the window opening 18. The side door opening 16 and the window opening on the side wall 7 are provided. 18 is an intermediate pillar 28, while the portion between the back door opening 14 and the window opening 18 is a rear pillar 29. That the vehicle body after the superstructure of the vehicle which is fixed a shoulder anchor 44 for latching the seat belt 42 in the portion of the inner panel 12,
A strength improving portion 56 is formed in the inner panel 12 from the lower portion of the opening edge of the window opening 18 to the opening edge of the side door opening 16 to restrain the seated person 37 on the seat 38 inside the vehicle body 2. In the seat belt 42, the strength improving portion 56 is formed so that the strength improving portion 56 is substantially parallel to the belt portion 42a extending forward from the shoulder anchor 44 side in a side view of the vehicle body 2 (FIG. 2). This is a rear upper structure of the vehicle body.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 includes an outer panel and an inner panel that are joined to each other, and each of the upper and lower left and right walls has a closed cross-sectional structure with a hollow section in the vertical direction. A roof panel is installed, and a space surrounded by the rear edge portions of the left and right walls and the roof panel is defined as a back door opening, and a side door opening and a window opening are formed side by side on the side wall. And a window glass that is fixed to the opening edge of the window opening and closes the window opening is provided, and a portion between the side door opening and the window opening on the side wall serves as an intermediate pillar, while the back door opening The rear pillar is a portion between the windshield opening and the window opening, and a vehicle is secured with a shoulder anchor that secures the seat belt to the middle portion of the inner panel in the rear pillar. After the body superstructure,
A fragile portion is formed in the inner panel portion in the vicinity of the rear corner portion that forms the rear upper portion of the opening edge of the window opening, and the following effects are produced.

  That is, at the time of the frontal collision of the vehicle, the seated person tries to move forward from the seat side by the inertial force, and the inertial force is applied to the rear pillar via the seatbelt and the shoulder anchor that holds the seatbelt. Mainly supported by the inner panel, the forward movement of the seated person from the seat side is prevented.

  Here, when the inertial force of the seated person is excessive at the time of the front collision, the inertial force is applied to the fixed portion of the shoulder anchor in the rear pillar via the seat belt and the shoulder anchor. As described above, in short, as a first point, the side wall may be bent so as to have a convex shape toward the outer side of the vehicle body with the front corner as a vertex in plan view of the vehicle body. Arise.

  Also, as a second point, the rear pillar is bent largely so as to have a convex shape toward the front of the vehicle body with the fixed portion of the shoulder anchor as a vertex in a side view of the vehicle body. In conjunction with the bending, the upper edge of the opening edge of the window opening may be bent so as to rotate downward about the front corner.

  When the above-described bending occurs, the shoulder anchor that hooks the seat belt is greatly displaced forward due to the bending, and the seat belt is unnecessarily greatly loosened. Arise.

  However, as described above, the fragile portion is formed in the inner panel portion in the vicinity of the rear corner portion that forms the rear upper portion of the opening edge portion of the window opening.

  For this reason, compared with the strength of the middle part of the longitudinal direction (vertical direction) of the rear pillar to which the shoulder anchor is fixed, it is suppressed by the fragile part that the strength on the upper end side of the rear pillar is excessive. As described above, when an inertial force is applied to the rear pillar, it is possible to prevent a large stress concentration from occurring in the fixed portion of the shoulder anchor in the rear pillar. That is, the rear pillar is restrained from being bent so as to have a dogleg shape when viewed from the side of the vehicle body, and at the beginning when the inertial force is applied to the rear pillar, Try to deform more evenly forward. By this deformation, the inertial force applied to the rear pillar is moderated to some extent at the beginning.

  Therefore, even if the inertial force of the seated person at the time of the front collision is excessive, it is suppressed that the inertial force is directly applied to the front corner portion of the opening edge portion of the window opening or the fixed portion of the shoulder anchor at the rear pillar. Therefore, it is suppressed that the side wall is bent into a convex shape toward the outer side of the vehicle body as the first point, and the rear pillar is bent into a character shape as the second point. And the bending of the upper edge of the opening edge of the window opening in conjunction with this are also suppressed. As a result, the amount of forward displacement of the fixed portion of the shoulder anchor is restrained to be small, and the seat belt hooked on the shoulder anchor is restrained from being greatly loosened. Is maintained well.

  Further, as described above, since the fragile portion is formed in the inner panel portion near the rear corner portion at the opening edge portion of the window opening, when the rear pillar is deformed forward due to inertial force as described above, this deformation is caused. Of the window opening is suppressed by the fragile portion from reaching the upper side of the opening edge of the window opening. Therefore, the side wall is prevented from being unnecessarily greatly deformed by the inertial force.

  According to a second aspect of the present invention, the weakened portion has a groove shape, and is configured by an outer end portion of a rear header formed by a rear end edge portion of the roof panel, and an upper edge portion of the side wall, and the side end of the roof panel. The weakened portion is formed to extend from the rear corner portion side of the window opening toward a trifurcated portion where the rear end portion of the roof side rail supporting the edge portion and the upper end portion of the rear pillar gather. .

  For this reason, the three headers where the rear headers, the roof side rails, and the upper ends of the rear pillars gather tend to increase in strength when these three members reinforce each other. By forming, the strength of the three-pronged portion including the upper end portion of the rear pillar is more reliably suppressed. Therefore, even if the inertial force of the seated occupant applied to the middle part of the rear pillar via the shoulder anchor is excessive at the time of a front collision, the inertial force causes a large stress concentration in the fixed portion of the shoulder anchor in the rear pillar. Occurrence is more reliably suppressed.

  In addition, as described above, a shoulder anchor is fixed to the inner panel of the outer and inner panels of the rear pillar, and the weakened portion is formed into a groove shape so as to extend from the rear corner portion toward the trifurcated portion. Therefore, as described above, when an inertial force is applied to the fixed portion of the shoulder anchor in the rear pillar, the inner panel fixing the shoulder anchor has the vehicle body centered on the valley bottom of the fragile portion. It is bent so as to turn toward the center of the vehicle body in the width direction. Therefore, the stress generated in the inner panel due to the inertial force tends to be distributed throughout the inner panel, and it is more reliably suppressed that a large stress concentration is generated in the fixed portion of the shoulder anchor in the rear pillar. Is done.

  According to a third aspect of the present invention, a strength improving portion is formed in a portion of the inner panel in the vicinity of the front of the fragile portion.

  For this reason, the formation of the strength improving portion makes it easy for stress concentration to occur based on the inertial force in the weakened portion where the drop in strength is increased adjacent to the strength improving portion. The rear pillar tends to bend so as to rotate forward and upward about the fragile portion, and at the same time, the fixed portion of the shoulder anchor in the rear pillar tends to rotate forward and upward.

  Therefore, since the front corner of the opening edge of the window opening is relatively closer to the line of inertia force extending forward from the shoulder anchor in the orthogonal direction, the inertia The bending moment applied to the front corner by the force is suppressed to a small level. For this reason, it is suppressed that the upper edge part of the opening edge part of the said window opening is bent so that it may rotate below centering on the said front corner | angular part by vehicle body side view as mentioned above.

  The effects of the invention of claim 4 correspond to the effects of the inventions of claims 1 to 3 and claim 5.

The invention of claim 5 includes an outer panel and an inner panel that are joined to each other, and each of the upper and lower left and right side walls has a closed cross-sectional structure with a hollow cross section in the vertical direction. A roof panel is installed, and a space surrounded by the rear edge portions of the left and right walls and the roof panel is defined as a back door opening, and a side door opening and a window opening are formed side by side on the side wall. And a window glass that is fixed to the opening edge of the window opening and closes the window opening is provided, and a portion between the side door opening and the window opening on the side wall serves as an intermediate pillar, while the back door opening The part between the window opening and the window opening is a rear pillar, and a shoulder anchor for fixing the seat belt is fixed to the inner panel part in the middle part of the rear pillar in the vertical direction. In the vehicle body after the superstructure of both,
Among the seat belts that form a strength improving portion in the inner panel portion that extends from the lower edge of the opening edge of the window opening to the opening edge of the side door opening, and restrains the seated person on the seat inside the vehicle body. The strength improving portion is formed so that the strength improving portion is substantially parallel to the belt portion extending forward from the shoulder anchor side in a side view of the vehicle body.

  That is, at the time of the frontal collision of the vehicle, the seated person tries to move forward from the seat side by the inertial force, and the inertial force is applied to the rear pillar via the seatbelt and the shoulder anchor that holds the seatbelt. Mainly supported by the inner panel, the forward movement of the seated person from the seat side is prevented.

  Here, when the inertial force of the seated person is excessive at the time of a front collision, the inertial force is applied to the fixed portion of the shoulder anchor in the rear pillar via the seat belt and the shoulder anchor. In short, as a first point, as a first point, the side wall may be largely bent so as to have a convex shape toward the outside of the vehicle body with the front corner as a vertex in a plan view of the vehicle body. Occurs. When this bending occurs, the bending causes a disadvantage that the shoulder anchor that holds the seat belt is greatly displaced forward and the seat belt is unnecessarily loosened.

  However, as described above, the portion of the side wall corresponding to the front corner portion in the plan view of the vehicle body is reinforced by the strength improving portion, so that the side wall is directed toward the outside of the vehicle body by the inertial force described above. Bending to a shape is suppressed, and the amount of forward displacement of the fixed portion of the shoulder anchor is suppressed to be small. Therefore, even if the inertial force of the seated person at the time of the front collision is excessive, it is possible to prevent the seat belt that is hooked on the shoulder anchor from being largely unnecessarily loosened, and the seat belt is restrained by this seat belt. Retained.

  In addition, as described above, among the seat belts that restrain the seated person on the seat inside the vehicle body, the strength improving portion is substantially parallel to the belt portion extending forward from the shoulder anchor side in a side view of the vehicle body. Since the strength improving portion is formed, the strength improving portion strongly opposes the inertial force in the longitudinal direction. Therefore, it is suppressed more reliably that the said side wall deform | transforms into a square shape by this inertial force.

It is the perspective view which looked at the vehicle body rear upper part from the compartment. It is a side surface partial broken view of a vehicle body rear part. It is a plane fragmentary sectional view of a vehicle body rear part. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified view of a rear body upper structure for explaining a conventional technique and its problems, (a) is a side view, and (b) is a vehicle body cross-sectional view taken along line bb in (a). Explanatory drawing (c), (d) is explanatory drawing equivalent to (a).

  The vehicle rear upper structure of the vehicle according to the present invention relates to a seating person to be given to the rear pillar via the shoulder anchor or the like due to a front collision when the vehicle travels in which the seating person is restrained via a seat belt and a shoulder anchor on the seat. The form for carrying out the present invention is as follows in order to realize the object of maintaining the restraining performance of the seated person satisfactorily by the seat belt even if the inertial force is excessive.

  That is, the rear upper part of the vehicle body has an outer panel and an inner panel that are joined to each other, and the left and right side walls each having a closed cross-sectional structure in which the vertical section is hollow, and the upper and lower edges of the left and right side walls. And a roof panel constructed on the part. A space surrounded by the rear edge portions of the left and right side walls and the roof panel is a back door opening. A side door opening and a window opening are formed side by side on the side wall, and a wind glass is provided that is fixed to the opening edge of the window opening and closes the window opening. A portion of the side wall between the side door opening and the window opening is an intermediate pillar. On the other hand, a portion between the back door opening and the window opening serves as a rear pillar, and a shoulder anchor for securing a seat belt is fixed to a portion of the inner panel in a middle portion in the vertical direction of the rear pillar. A fragile portion is formed in the inner panel portion in the vicinity of the rear upper corner at the opening edge of the window opening.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 is a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1.

  The vehicle 1 includes a sheet metal body 2 and a front wheel 4 and a rear wheel 4 before the body 2 is supported on the traveling surface 3. The rear portion of the vehicle body 2 includes a vehicle body lower member 6 composed of a side sill and a floor panel, a side wall 7 protruding upward from the left and right side portions of the vehicle body lower member 6, and upper ends of the left and right side walls 7. And a roof panel 8 installed on the edge. The interior space of the vehicle body 2 surrounded by the vehicle body lower member 6, the side walls 7, and the roof panel 8 is a vehicle compartment 9.

  The side wall 7 includes an outer panel 11 and an outer panel 11 and 12 that face each other at a distance from each other in the width direction of the vehicle body 2, and has a closed cross-section structure in which each section in the vertical direction is hollow. The upper edge portions of the outer and inner panels 11 and 12 and the side edge portions of the roof panel 8 are overlapped and joined to each other by spot welding S1.

  A space surrounded by the rear end edges of the vehicle body lower member 6, the left side, the right side wall 7, and the roof panel 8 is a back door opening 14, and a back door 15 is provided that closes the back door opening 14 so that it can be opened and closed. It has been. A side door opening 16 is formed on the front side of the side wall 7, and a side door 17 that closes the side door opening 16 so as to be openable and closable is provided. A window opening 18 is formed above the side wall 7 between the back door opening 14 and the back door 15. A wind glass 20 that is fixed to the opening edge of the window opening 18 by an adhesive via a weatherstrip rubber 19 and closes the window opening 18 is provided.

  A header panel 23 extending in the width direction of the vehicle body 2 along the rear edge of the roof panel 8 is provided. Although not shown in detail, the header panel 23 and the inner panel 12 of each of the side walls 7 are formed separately from each other, and then connected to each other by spot welding. The rear edge portion of the roof panel 8 and the header panel 23 are overlapped with each other and joined to each other by spot welding S2, thereby forming a rear header 24 having high strength. Further, at each opening edge of the back door opening 14, the side door opening 16, and the window opening 18, the outer and inner panels 11 and 12 are overlapped with each other and coupled to each other by spot welding S3 to S5.

  The upper portions of the opening edge portions of the side door opening 16 and the window opening 18 have substantially the same height in the vertical direction. The upper edge portion of the side wall 7 above the side door opening 16 and the window opening 18 has a closed cross-sectional shape in which almost each portion in the front-rear direction of the vehicle body 2 is hollow by the upper edge portions of the outer and inner panels 11 and 12. The roof side rail 26 has high strength.

  A portion of the side wall 7 between the side door opening 16 and the window opening 18 is an intermediate pillar 28, and a portion between the back door opening 14 and the window opening 18 is a rear pillar 29. The intermediate pillar 28 and the rear pillar 29 have a closed closed cross-sectional structure in which the vertical portions are hollowed by the outer and inner panels 11 and 12 to increase the strength. The rear pillar 29 has a rear portion 29b bent toward the vehicle body center 30 in the width direction of the vehicle body 2 with respect to the front portion 29a in a plan view of the vehicle body 2 (FIG. 3). Accordingly, a valley line 29c is formed in the inner panel 12 at the transition portion between the front portion 29a and the rear portion 29b of the rear pillar 29.

  Inserting a welding gun for the spot welding S1 into the inner panel 12 at the three-pronged portion 32 where the outer end of the rear header 24, the rear end of the roof side rail 26, and the upper end of the rear pillar 29 gather. A working opening 33 is formed. Specifically, the work opening 33 is formed in the inner panel 12 of the rear part 29b of the rear pillar 29. However, as shown by a one-dot chain line in FIG. 1, the work opening 33 is located on the valley line 29c. It may be formed.

  A garnish 34 extending along the side surface of the compartment 9 of the inner panel 12 of the side wall 7 is provided, and a plurality of seat portions 36 for locking the garnish 34 by clips 35 are provided on the inner panel 12 of the side wall 7. Is formed. Each of the seats 36 is formed by bending (pressing) the inner panel 12.

  In front of the rear pillar 29, a seat 38 having a passenger as a seat 37 is provided on the right side of the rear portion of the vehicle compartment 9, and the seat 38 is supported by the vehicle body lower member 6. A three-point seat belt device 39 is provided that allows a seated person 37 seated on the seat 38 to be restrained on the seat 38.

  The seat belt device 39 is fixed to the lower portion of the side wall 7, and is connected to a retractor 40, generally referred to as ELR, so that one end is elastically wound around the retractor 40 and the other end is a vehicle of the seat 38. In the vicinity of the outer side, a seat belt 42 fixed to the vehicle body lower member 6 side by an anchor 41 is provided.

  Further, the seat belt device 39 is attached to a middle part (upper part) of the rear pillar 29 in the vertical direction by a fastener 43, and a shoulder for slidably latching the middle part of the seat belt 42 in its longitudinal direction. An anchor 44, a buckle 45 connected to the vehicle body lower member 6 in the vicinity of the side of the vehicle body center 30 in the width direction of the vehicle body 2 of the seat 38, and a seat belt 42 between the anchor 41 and the shoulder anchor 44. There is provided a tongue plate 46 that is slidably locked in the longitudinal direction thereof and detachably locked to the buckle 45. Specifically, the shoulder anchor 44 is fixed to the middle portion of the inner panel 12 in the width direction (front-rear direction) on the upper portion of the front portion 29 a of the rear pillar 29 by the fastener 43.

  The middle part of the seat belt 42 from the anchor 41 to the tongue plate 46 and the other middle part of the seat belt 42 from the tongue plate 46 to the shoulder anchor 44 are seated on the front surface of the seated person 37 seated on the seat 38. The seat 37 is restrained on the seat 38 by elastically contacting the seat.

  In the above configuration, the fragile portion 50 is formed in the inner panel 12 in the vicinity of the rear corner portion 49 that forms the rear upper portion of the opening edge of the window opening 18. The fragile portion 50 is formed by bending the inner panel 12 so that the surface of the inner panel 12 on the side of the passenger compartment 9 has a concave groove shape. The weakened portion 50 extends from the rear corner 49 side of the window opening 18 toward the trifurcated portion 32, and the groove depth of each cross section in the longitudinal direction becomes shallower toward the trifurcated portion 32. Is formed.

  The fragile portion 50 may be formed to have a concave groove shape when viewed from the outside of the vehicle body 2. Further, the fragile portion 50 may be a slit formed in the inner panel 12 or a thin portion.

  A strength improving portion 54 is formed in the portion of the inner panel 12 in the vicinity of the front of the fragile portion 50 by bending the portion of the inner panel 12. The strength improving portion 54 is formed by bending the seat portion 36 so as to bulge larger toward the window opening 18.

  The inner panel 12 is bent at a portion of the inner panel 12 that extends from the rear lower part behind the front edge of the opening edge of the window opening 18 to the opening edge of the side door opening 16 in front of the front edge. Thus, another strength improving portion 56 is formed. The lower portion of the opening edge portion of the window opening 18 has a downwardly convex arc shape, and the other strength improving portion 56 is tangential to the lower portion of the opening edge portion of the window opening 18 toward the front lower side. It extends. Of the seat belt 42 that restrains the seated person 37 on the seat 38 inside the vehicle body 2, the strength improving portion 56 is seen from the side of the vehicle body 2 with respect to the belt portion 42a extending forward and downward from the shoulder anchor 44 side (FIG. 2). The strength improving portion 56 is formed so as to be substantially parallel to each other. The other strength improving portion 56 is formed by bending the portion of the inner panel 12 in a step shape, but may be a bead shape.

  At the time of a frontal collision of the vehicle 1, the seated person 37 tries to move forward from the seat 38 side by the inertial force F. The inertial force F is applied to the seatbelt 42 and a shoulder anchor that holds the seatbelt 42. 44, which is mainly supported by the inner panel 12 of the rear pillar 29, and prevents the seated person 37 from moving forward from the seat 38 side.

  Here, when the inertial force F of the seated person 37 is excessive at the time of the front collision, the inertial force F is given to the fixing portion of the shoulder anchor 44 in the rear pillar 29 via the seat belt 42 and the shoulder anchor 44. As described in the prior art with reference to FIG. 5, in short, as a first point, the side wall 7 has the front corner 58 as the apex in the vehicle body 2 in plan view of the vehicle body 2 (FIG. 3). There is a risk of bending A so as to form a convex shape toward the outer side of.

  As a second point, according to the inertial force F, stress concentration tends to occur in the front corner portion 58, and in addition, a large stress concentration also occurs in the fixed portion of the shoulder anchor 44 in the rear pillar 29. Since this tends to occur, the rear pillar 29 has a convex shape toward the front of the vehicle body 2 with the fixed portion of the shoulder anchor 44 as the apex in the side view of the vehicle body 2 (see FIG. 2 (see FIG. 1)). A large bend B is formed so as to form a shape, and the upper edge of the opening edge of the window opening 18 is rotated downward about the front corner 58 in conjunction with the bend B of the rear pillar 29. There is a risk of bending C.

  When the above-described bends A to C are generated, the shoulder anchor 44 for latching the seat belt 42 is largely displaced forward by the bends A to C, and the seat belt 42 Is unnecessarily greatly loosened.

  However, according to the said structure, the weak part 50 is formed in the part of the inner panel 12 near the rear corner | angular part 49 which forms the rear upper part of the opening edge part of the window opening 18. As shown in FIG.

  For this reason, compared with the strength of the middle part of the longitudinal direction (vertical direction) of the rear pillar 29 to which the shoulder anchor 44 is fixed, the weakness portion 50 prevents the strength of the upper end side of the rear pillar 29 from becoming excessive. Therefore, as described above, when the inertial force F is applied to the rear pillar 29, it is possible to suppress the occurrence of a large stress concentration at the fixed portion of the shoulder anchor 44 in the rear pillar 29. That is, the rear pillar 29 is restrained from being bent B so that the rear pillar 29 is shaped like a dogleg when viewed from the side of the vehicle body 2 (FIG. 2), and the rear pillar 29 is initially subjected to the inertial force F. First, each part in the longitudinal direction tends to deform toward the front more evenly. By this deformation, the inertial force F applied to the rear pillar 29 is moderated to some extent at the beginning.

  Therefore, even if the inertial force F of the seated person 37 at the time of the front collision is excessive, the inertial force F remains as it is at the front corner 58 of the opening edge of the window opening 18 or the fixed portion of the shoulder anchor 44 at the rear pillar 29. Therefore, as the first point, the side wall 7 is prevented from bending A into a convex shape toward the outer side of the vehicle body 2, and the second point is It is also suppressed that the above-described rear pillar 29 bends B into a dogleg shape and that the upper edge of the opening edge of the window opening 18 bends C in conjunction with this. As a result, the amount of forward displacement of the fixed portion of the shoulder anchor 44 is suppressed to be small, and the seat belt 42 that is hooked on the shoulder anchor 44 is prevented from being greatly loosened unnecessarily. The restraint performance of the person 37 is maintained well.

  Further, as described above, since the fragile portion 50 is formed in the portion of the inner panel 12 in the vicinity of the rear corner portion 49 in the opening edge portion of the window opening 18, the rear pillar 29 is moved forward by the inertia force F as described above. When deforming, the fragile portion 50 prevents the deformation from reaching the roof side rail 26 constituted by the upper side of the opening edge of the window opening 18. Therefore, the side wall 7 is prevented from being unnecessarily greatly deformed by the inertial force F.

  Further, as described above, the fragile portion 50 has a groove shape, and is configured by the outer end portion of the rear header 24 formed by the rear end edge portion of the roof panel 8 and the upper edge portion of the side wall 7. The fragile portion 50 faces the rear end of the window opening 18 toward the trifurcated portion 32 where the rear end portion of the roof side rail 26 that supports the side edge portion of the panel 8 and the upper end portion of the rear pillar 29 gather. It is formed to extend from the corner 49 side.

  For this reason, the three-pronged portion 32 where the rear header 24, the roof side rail 26, and the upper end of the rear pillar 29 gather is apt to increase in strength as these three members reinforce each other. By forming the fragile portion 50, the strength of the trifurcated portion 32 including the upper end portion of the rear pillar 29 is more reliably suppressed. Therefore, even if the inertial force F of the seat 37 given to the middle part of the rear pillar 29 via the shoulder anchor 44 is excessive during a front collision, the inertial force F causes the shoulder anchor 44 of the rear pillar 29 to move. The occurrence of stress concentration at the fixed portion is more reliably suppressed.

  In addition, as described above, the shoulder anchor 44 is fixed to the inner panel 12 of the outer and inner panels 11 and 12 of the rear pillar 29, and the rear pillar 29 has a rear portion 29b with respect to the front portion 29a. And the fragile portion 50 is formed in a groove shape so as to extend from the rear corner portion 49 toward the three-pronged portion 32.

  For this reason, when the inertia force F is given to the fixed part of the shoulder anchor 44 in the rear pillar 29 as described above, the inner panel 12 fixing the shoulder anchor 44 has the valley bottom of the fragile part 50. It is easily turned toward the vehicle body center 30 side in the width direction of the vehicle body 2 about the portion 50a and bent so as to bulge as a whole (the chain line in FIG. 3). Therefore, the stress generated in the inner panel 12 due to the inertial force F tends to be dispersed throughout the inner panel 12, and a large stress concentration is generated in the fixed portion of the shoulder anchor 44 in the rear pillar 29. , More reliably suppressed.

  Further, as described above, the strength improving portion 54 is formed in the portion of the inner panel 12 in the vicinity of the front of the fragile portion 50.

  For this reason, the formation of the strength improving portion 54 makes it easy for stress concentration to occur in the weakened portion 50 adjacent to the strength improving portion 54 due to the inertial force F. Due to the inertial force F, the rear pillar 29 tends to bend so as to rotate forward and upward about the fragile portion 50, and at the same time, the fixing portion of the shoulder anchor 44 in the rear pillar 29 tends to rotate forward and upward. It becomes.

  Accordingly, the front corner 58 of the opening edge of the window opening 18 is relatively closer to the line of inertia force F extending forward from the shoulder anchor 44 in the direction perpendicular thereto. Therefore, the bending moment applied to the front corner portion 58 by the inertial force F is suppressed to be small. For this reason, as described above, when viewed from the side of the vehicle body 2 (FIG. 2), the upper edge of the opening edge of the window opening 18 is bent C so as to rotate downward about the front corner 58. That is suppressed.

  Further, as described above, another strength improving portion 56 is formed in the inner panel 12 from the lower portion of the opening edge of the window opening 18 to the opening edge of the side door opening 16, and the seat inside the vehicle body 2 is formed. Of the seat belt 42 that restrains the seated person 37 on 38, the other strength improving portion 56 is substantially parallel to the belt portion 42a extending forward from the shoulder anchor 44 side in a side view of the vehicle body 2 (FIG. 2). The other strength improvement part 56 is formed so that it may become.

  That is, at the time of a frontal collision of the vehicle 1, the seated person 37 tries to move forward from the seat 38 side by the inertial force F. The inertial force F latches the seatbelt 42 and the seatbelt 42. It is mainly supported by the inner panel 12 of the rear pillar 29 via the shoulder anchor 44, and the forward movement of the seated person 37 from the seat 38 side is prevented.

  Here, when the inertial force F of the seated person 37 is excessive at the time of the front collision, the inertial force F is applied to the fixed portion of the shoulder anchor 44 in the rear pillar 29 via the seat belt 42 and the shoulder anchor 44. In short, as explained in the above-mentioned prior art, in short, as a first point, the side wall 7 is located outwardly of the vehicle body 2 with the front corner 58 as a vertex in the plan view of the vehicle body 2 (FIG. 3). There is a risk of bending A so as to form a convex shape. When this bending A occurs, the bending anchor A causes the shoulder anchor 44 that latches the seat belt 42 to be greatly displaced forward, and the seat belt 42 is greatly unnecessarily loosened. Arise.

  However, according to the above configuration, the portion of the side wall 7 corresponding to the front corner portion 58 in the plan view of the vehicle body 2 (FIG. 3) is reinforced by the other strength improving portion 56. It is suppressed that the side wall 7 is largely bent in a shape toward the outside of the vehicle body 2, and the amount of forward displacement of the fixed portion of the shoulder anchor 44 is suppressed to be small. Therefore, even if the inertia force F of the seated person 37 at the time of the front collision is excessive, the seat belt 42 that is hooked on the shoulder anchor 44 is suppressed from being loosened unnecessarily, and the seated person by the seat belt 42 is restrained. The restraining performance of 37 is maintained well.

  Moreover, as described above, of the seat belt 42 that restrains the seated person 37 on the seat 38 inside the vehicle body 2, the strength improving portion 56 is provided on the vehicle body 2 with respect to the belt portion 42 a that extends forward from the shoulder anchor 44 side. Since the strength improving portion 56 is formed so as to be substantially parallel in a side view (FIG. 2), the strength improving portion 56 strongly opposes the inertial force F in the longitudinal direction. Therefore, the inertial force F can more reliably prevent the side wall 7 from being deformed into a U-shape.

  In addition, although the above is based on the example of illustration, the said intensity | strength improvement parts 54 and 56 may provide a reinforcement material separately, and may make it improve intensity | strength.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 6 Car body lower member 7 Side wall 8 Roof panel 9 Car compartment 11 Outer panel 12 Inner panel 14 Back door opening 16 Side door opening 17 Side door 18 Window opening 20 Wind glass 23 Header panel 24 Rear header 26 Roof side rail 28 Middle part Pillar 29 Rear pillar 29a Front 29b Rear 29c Valley fold line 30 Car body center 32 Three-way part 33 Work opening 34 Garnish 35 Clip 36 Seat part 37 Seated person 38 Seat 39 Seat belt device 42 Seat belt 42a Belt part 44 Shoulder anchor 49 Rear corner Part 50 Fragile part 50a Valley bottom part 54 Strength improvement part 56 Strength improvement part 58 Front corner part A Bend B Bend C Bend F Inertial force

Claims (5)

The left and right walls having outer and inner panels that are joined to each other and having a closed cross-section structure in which each section in the vertical direction is hollow, and a roof panel that is installed on each upper edge of the left and right walls. A space surrounded by the rear edges of the left and right side walls and the roof panel is a back door opening, and a side door opening and a window opening are formed on the side wall side by side, and the opening of the window opening A window glass that is fixed to the edge and closes the window opening is provided, and a portion between the side door opening and the window opening on the side wall serves as an intermediate pillar, and between the back door opening and the window opening. The rear pillar is a rear pillar, and the vehicle body rear upper structure of the vehicle in which a shoulder anchor for securing the seat belt is fixed to the inner panel portion in the middle of the rear pillar in the vertical direction. In,
A vehicle rear upper structure of a vehicle, wherein a weak portion is formed in a portion of the inner panel in the vicinity of a rear corner portion that forms a rear upper portion of an opening edge portion of the window opening.   The fragile portion is formed into a groove shape, and is configured by an outer end portion of a rear header formed by a rear end edge portion of the roof panel, and an upper edge portion of the side wall, and supports a side end edge portion of the roof panel. The fragile portion is formed to extend from the rear corner portion side of the window opening toward a trifurcated portion where a rear end portion of a rail and an upper end portion of the rear pillar are gathered. The vehicle rear upper structure of the described vehicle.   The vehicle body rear upper structure according to claim 1, wherein a strength improving portion is formed in a portion of the inner panel in the vicinity of the front of the fragile portion. The fragile portion is formed into a groove shape, and is configured by an outer end portion of a rear header formed by a rear end edge portion of the roof panel, and an upper edge portion of the side wall, and supports a side end edge portion of the roof panel. The weakened portion is formed so as to extend from the rear corner portion side of the window opening toward a trifurcated portion where the rear end portion of the rail and the upper end portion of the rear pillar gather.
Forming a strength improving portion in the portion of the inner panel in the vicinity of the front of the fragile portion;
Among the seat belts that form another strength improving portion in the inner panel portion that extends from the lower portion of the opening edge of the window opening to the opening edge of the side door opening, and restrains the seated person on the seat inside the vehicle body The other strength improving portion is formed so that the other strength improving portion is substantially parallel to the belt portion extending forward from the shoulder anchor side in a side view of the vehicle body. Rear upper structure of the vehicle. The left and right walls having outer and inner panels that are joined to each other and having a closed cross-section structure in which each section in the vertical direction is hollow, and a roof panel that is installed on each upper edge of the left and right walls. A space surrounded by the rear edges of the left and right side walls and the roof panel is a back door opening, and a side door opening and a window opening are formed on the side wall side by side, and the opening of the window opening A window glass that is fixed to the edge and closes the window opening is provided, and a portion between the side door opening and the window opening on the side wall serves as an intermediate pillar, and between the back door opening and the window opening. The rear pillar is a rear pillar, and the vehicle body rear upper structure of the vehicle in which a shoulder anchor for securing the seat belt is fixed to the inner panel portion in the middle of the rear pillar in the vertical direction. In,
Among the seat belts that form a strength improving portion in the inner panel portion that extends from the lower edge of the opening edge of the window opening to the opening edge of the side door opening, and restrains the seated person on the seat inside the vehicle body. A vehicle rear upper structure of a vehicle, wherein the strength improving portion is formed so that the strength improving portion is substantially parallel to the belt portion extending forward from the shoulder anchor side in a side view of the vehicle body.

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