JP5751149B2 - Jack up structure - Google Patents

Description

  The present invention relates to a jackup structure of a vehicle.

  2. Description of the Related Art Conventionally, there has been known a jackup portion structure using a jackup bracket that is fixed to a rear lower portion of a vehicle and pushed up by a jack (see, for example, Patent Document 1).

  In the jackup portion structure of Patent Document 1, the jackup bracket is fixed to the rear surface of the vehicle body by welding. The rear surface of the vehicle body to which the jackup bracket is welded is a vertical surface perpendicular to the ground. In addition, the jack-up bracket includes a vertical plate portion and a side plate portion formed in a cylindrical shape, a bottom plate portion, and a projecting portion interposed between the bottom plate portion and the side plate portion in a state where the bottom plate portion is pressed upward by the jack. And.

  Here, in the jack-up portion structure of Patent Document 1, when the jack-up bracket is pushed up by the jack, the protruding portion is interposed between the bottom plate portion and the side plate portion, thereby suppressing the deformation of the vertical plate portion. .

JP 2009-029336 A

  However, in the jackup structure of Patent Document 1, when the jackup bracket is pushed up by the jack, the jackup bracket is inclined in a direction intersecting the vertical direction (a direction in which the jackup bracket is separated from the welding surface). For this reason, it is conceivable that a large peeling force acts on the jack-up bracket pushed up by the jack, and the jack-up bracket peels off from the welding surface.

  In view of the above facts, the present invention has an object to obtain a jack-up structure that can prevent the jack-up bracket from being peeled off from the lower back panel when the vehicle is jacked up.

The jack-up portion structure according to the first aspect of the present invention is disposed at the rear end side of the vehicle body and is provided at the lower portion of the lower back panel extending along the vehicle width direction and the vehicle vertical direction. And a jack-up point that is lifted by a jack is set at the front of the vehicle with respect to at least one of the joint positions. A jack-up bracket, and a reinforcing bracket which is provided below the inclined portion in the vehicle vertical direction and has one end joined to the lower back panel or the vehicle body and the other end joined to the jack-up bracket. .

  In the jack-up structure according to the first aspect of the invention, since the inclined portion of the lower back panel is inclined to the vehicle front lower side, the joint surface between the inclined portion and the joint portion of the jack-up bracket is the vehicle front lower side. It is arranged to be inclined. For this reason, when the jack-up bracket is pushed up by the jack, the inclination angle of the joint surface with respect to the vehicle vertical direction (vertical surface) becomes small and eventually becomes parallel to the vertical surface.

  Here, when the joint surface is parallel to or almost parallel to the vertical surface, the push-up force that pushes up the jack-up bracket acts on the joint position as a shear input that is substantially parallel to the joint surface. To do. And the peeling force (peeling component) to the peeling direction which becomes a perpendicular | vertical direction with respect to a joint surface reduces.

  Furthermore, the jack-up point of the jack-up bracket is set (placed) in front of the vehicle with respect to at least one joining position among the joining positions of the inclined portion and the joining portion. For this reason, when the vehicle is jacked up, the push-up force by the jack presses (contacts) the joint portion against the inclined portion until the joint surface between the slope portion and the joint portion becomes parallel to the vertical surface. Acts as a force.

With these actions, in the jackup structure according to the first aspect of the present invention, the jackup bracket can be prevented from being peeled off from the lower back panel when the vehicle is jacked up. In addition, since the jack-up point is close to the front of the vehicle, it is difficult to see the jack-up bracket from the rear of the vehicle, and the appearance from the rear of the vehicle can be improved. Further, when jacking up a heavy vehicle in which a large shearing force acts on the joining position between the inclined portion and the joining portion, the reinforcing bracket bears a part of the shearing force. Thereby, the shear force which acts on the joining position of an inclination part and a junction part is reduced, and the heavy vehicle body can be jacked up.

Jack-up unit structure according to the second aspect of the invention, the lower side of the inclined portion of the lower back panel is tilted or the vehicle vertical direction at an angle smaller than the inclination angle of the inclined portion with respect to the vertical direction of the vehicle A to-be-joined portion is formed, and the vehicle body is joined to the to-be-joined portion.

In the jack-up portion structure according to the invention of claim 2, the lower portion of the lower back panel than the inclined portion is a side wall in an upright or nearly upright state. Compared to the configuration in which the tire is inclined at a large inclination angle, the mounting height of the spare tire mounted on the vehicle body can be lowered.

The jack-up portion structure according to the invention of claim 3 is disposed at the rear end side of the vehicle body, and is provided at the lower portion of the lower back panel extending along the vehicle width direction and the vehicle vertical direction. an inclined portion inclined to the formed lower than the inclined portions of the lower back panel, upright tilt or the vehicle vertical direction at an angle smaller than the inclination angle of the inclined portion with respect to the vehicle vertical direction, the A to- be-joined part to which a vehicle body is joined and a joining part joined to the inclined part at at least one joining position are provided, and a jack-up point lifted by a jack is set in front of the vehicle from at least one joining position. A jack-up bracket.

  In the jack-up part structure according to the invention of claim 3, the lower part of the lower back panel than the inclined part becomes a side wall in an upright or nearly upright state, and therefore the lower part of the lower part is inclined from the inclined part. Compared to the configuration in which the tire is inclined at a large inclination angle, the mounting height of the spare tire mounted on the vehicle body can be lowered.

  As described above, according to the jackup portion structure of the present invention described in claim 1, it is possible to suppress the peeling of the jackup bracket from the lower back panel when the vehicle is jacked up. Have

According to the jack-up portion structure according to the second aspect of the present invention, there is an excellent effect that the mounting height of the spare tire mounted on the vehicle body can be reduced.

The jackup structure according to the third aspect of the present invention has an excellent effect that the jackup bracket can be prevented from peeling from the lower back panel when the vehicle is jacked up.

It is an expanded sectional view of the vehicle rear part which shows the jackup part structure which concerns on 1st Embodiment. It is explanatory drawing which showed the angle which becomes visible from the back of a vehicle with the jackup bracket which concerns on 1st Embodiment with the comparative example. It is a schematic diagram which shows the state after jacking up the vehicle which concerns on 1st Embodiment. (A), (B) It is an expanded sectional view of the vehicle rear part which shows the state before jacking up the vehicle which concerns on 1st Embodiment, and the state after jacking up. It is an expanded sectional view of the vehicle rear part which shows the jackup part structure which concerns on 2nd Embodiment. It is an expanded sectional view of the vehicle rear part which shows the state after jacking up the vehicle which concerns on 2nd Embodiment. It is an expanded sectional view of the vehicle rear part which shows the jackup part structure which concerns on 3rd Embodiment. It is an expanded sectional view of the vehicle rear part which shows the state after jacking up the vehicle which concerns on 3rd Embodiment. (A), (B) It is an expanded sectional view of the vehicle rear part which shows the state before jacking up the vehicle of a comparative example, and the state after jacking up.

(First embodiment)
An example of the jackup structure according to the first embodiment of the present invention will be described.

  FIG. 1 shows an enlarged cross-sectional view when the jack-up portion structure 10 of the first embodiment provided in the rear portion (region R indicated by a broken line) of the vehicle 12 is viewed in the vehicle width direction of the vehicle 12. . Note that an arrow UP in the figure indicates an upward direction of the vehicle 12 (hereinafter simply referred to as “upward”), and an arrow FR indicates the front of the vehicle 12 (hereinafter sometimes simply referred to as “forward”). The direction from the near side to the far side in the figure is the vehicle width direction of the vehicle 12. The upward direction of the vehicle 12 corresponds to the vertically upward direction with respect to the ground G (see FIG. 3).

  The vehicle 12 has a trunk room 14 for storing a spare tire S (indicated by a two-dot chain line) in the rear part. A lower part (bottom part) of the trunk room 14 is a floor member as an example of a vehicle body and has a plate-like shape. A rear floor panel 16 (floor pan) is provided.

  The rear floor panel 16 has a main body portion 16A that extends in the front-rear direction and the vehicle width direction of the vehicle 12, and a bent portion 16B that is bent upward at the rear end of the main body portion 16A. Further, both ends of the rear floor panel 16 in the vehicle width direction are respectively supported (fixed) by rectangular tubular side members (not shown), and the side members extend along the front-rear direction at both ends of the vehicle 12 in the vehicle width direction. Are arranged. And the lower back panel 20 (lower back) is joined to the bending part 16B.

  The lower back panel 20 is disposed on the rear end side of the rear floor panel 16 and extends along the vehicle width direction and the vehicle vertical direction. Further, the lower back panel 20 has a configuration in which a flange portion 20A, a central portion 20B, an inclined portion 20C, and an upright portion 20D are integrated in this order from the front to the rear of the vehicle 12. In addition, illustration and description above the upper part 20D of the lower back panel 20 are omitted.

  The central portion 20B is a portion that is slightly inclined to the front lower side of the vehicle 12, and the flange portion 20A is bent downward from the front end (lower end) of the central portion 20B in the front-rear direction of the vehicle 12. It is a part.

  The inclined portion 20C is a portion that is inclined from the rear end of the central portion 20B in the front-rear direction of the vehicle 12 to the upper rear side. In other words, the inclined portion 20C is from the lower end of the rising portion 20D to the lower front side of the vehicle 12. It is an inclined part. The rising portion 20 </ b> D is a portion raised upward from the rear end (upper end) of the inclined portion 20 </ b> C in the front-rear direction of the vehicle 12.

  In addition, the inclined portion 20C has an inclination angle forward with respect to a perpendicular V (vertical surface and corresponding to the vehicle vertical direction) perpendicular to the ground G (see FIG. 3) as an example, 5 ° ≦ It is set so that θ ≦ 45 °. Note that the inclination angle θ is the inclination angle of the vehicle 12 with respect to the ground G when the rear tire T of the vehicle 12 is lifted from the ground G when the rear portion of the vehicle 12 is jacked up using the jack 60 (garage jack). Is set in advance so as to correspond to. Here, the angle setting of 5 ° or more and 45 ° or less is applicable regardless of the type of the vehicle 12 from a small vehicle to a large vehicle, but the inclination angle θ is particularly 10 in consideration of workability. It is preferable to set in the range of not less than 30 ° and not more than 30 °.

  On the other hand, the flange portion 20A is joined to the bent portion 16B of the rear floor panel 16 by spot welding. In the following description, “joining by spot welding” may be simply referred to as “joining”. Further, a lower end (a flange portion 22A described later) of the lower back reinforcement 22 for reinforcing the lower back panel 20 is joined to the rear surface (the rear surface in the front-rear direction) of the upper portion of the inclined portion 20C.

  The lower back reinforcement 22 has a configuration in which a flange portion 22A, a central portion 22B, and an upright portion 22C are integrated in this order from the front to the rear of the vehicle 12. In addition, illustration and description above the upper part 22C of the lower back reinforcement 22 are omitted.

  The central portion 22B is a portion that is slightly inclined to the front lower side of the vehicle 12, and the flange portion 22A is bent from the front end (lower end) of the central portion 22B in the front-rear direction of the vehicle 12 toward the front lower side. It is a part. The raised portion 22C is a portion raised upward from the rear end (upper end) of the central portion 22B. The flange portion 22A is joined to the upper rear surface of the inclined portion 20C of the lower back panel 20 as described above.

  One end of a jack-up bracket 30 (joint portion 30A described later) is joined to a lower rear surface of the inclined portion 20C in the lower back panel 20, and a jack-up is arranged on a lower rear surface of the upright portion 22C in the lower back reinforcement 22. The other end (an upright part 30E described later) of the bracket 30 is joined.

  The jack-up bracket 30 has a cross-sectional shape close to a U shape when the vehicle 12 is viewed in the vehicle width direction. Specifically, the jack-up bracket 30 includes a joint portion 30A, a front wall portion 30B, a bottom portion 30C, a rear wall portion 30D, and an upright portion in the counterclockwise direction from the left side (vehicle front side) to the right side (vehicle rear side). 30E is integrated in this order. Note that the length of the jack-up bracket 30 in the vehicle width direction is considerably shorter than the length of the lower back panel 20 so as to be placed on a jack plate 60A of the jack 60 described later.

  Similar to the inclined portion 20C of the lower back panel 20, the joint portion 30A is a portion inclined to the lower front side of the vehicle 12, and the forward inclination angle with respect to the perpendicular V is θ. The front surface (front surface in the front-rear direction) of the joint portion 30A is joined to the rear surface of the inclined portion 20C.

  Here, in FIG. 1, the joining position between the inclined portion 20C and the joining portion 30A is indicated by an X mark. In the present embodiment, as an example, the inclination direction of the joining surface Ma between the inclined portion 20C and the joining portion 30A ( Two joint positions P1 (front) and joint position P2 (rear) are set at intervals in the direction of the broken line La). In addition, although the joining positions P1 and P2 are set at a plurality of locations at intervals in the vehicle width direction on the joining surface Ma, illustration and description of the joining positions in the vehicle width direction are omitted.

  The front wall portion 30B is a portion that is erected downward from the lower end of the joint portion 30A. The vertical length of the front wall portion 30B is a viewing angle α1 at which the bottom portion 30C is visually recognized from the rear of the vehicle 12 (see FIG. 2). ) Is set based on.

  The bottom portion 30C is formed with a preset width from the lower end of the front wall portion 30B to the rear of the vehicle 12. Further, a jack-up point PJ to be lifted by the jack 60 is set in advance at the bottom 30C. In this embodiment, as an example, as shown in FIG. 1, the jack-up point PJ is illustrated as the center position (bisected position) of the width of the bottom portion 30 </ b> C in the front-rear direction of the vehicle 12.

  As an example, the jack-up point PJ is set (placed) in front of the joint positions P1 and P2 in the front-rear direction of the vehicle 12. Specifically, the jack-up point PJ is set at a position that is a distance d1 ahead of the vehicle 12 relative to the joint position P1.

  In the present embodiment, as an example, the jack-up point PJ is set at a position that is a distance d1 ahead of the vehicle 12 from the joint position P1, but the jack-up point PJ is a broken line La indicating the inclination direction of the joint surface Ma. It is particularly preferable that the above is set. That is, it is particularly preferable to set the jackup point PJ at the intersection PM between the upper surface of the jack plate 60A of the jack 60 (the surface on which the bottom 30C of the jackup bracket 30 is placed) and the broken line La.

  The rear wall portion 30D is a portion that is inclined from the rear end of the bottom portion 30C to the rear upper side. The rear wall portion 30 </ b> D has an upper end extending to the vicinity of the lower end of the raised portion 22 </ b> C of the lower back reinforcement 22. Further, the upright portion 30E is a portion raised upward from the rear end (upper end) of the rear wall portion 30D. The front surface of the upright portion 30 </ b> E is joined to the rear surface of the raised portion 22 </ b> C of the lower back reinforcement 22.

  On the other hand, a bumper reinforcement 42 and a bumper cover 44 that covers the bumper reinforcement 42 from the rear of the vehicle 12 are provided behind the lower back reinforcement 22 and the jack-up bracket 30 in the vehicle 12.

  The bumper reinforcement 42 extends along the vehicle width direction, and a front surface portion of the bumper reinforcement 42 is fastened and fixed to a rear surface of a bumper arm (not shown) provided in the vehicle 12.

  The bumper cover 44 includes an upright portion 44A serving as a design surface disposed behind the bumper reinforcement 42, a rear wall portion 44B inclined from the lower end of the upright portion 44A to the vehicle front lower side, and a lower end of the rear wall portion 44B. It includes a lower end portion 44C that is erected downward. In the longitudinal direction of the vehicle 12, the distance from the upright portion 44A to the jack-up point PJ is L1.

  Furthermore, the vehicle 12 is provided with a reinforcing bracket 50 that connects the lower surface front of the center portion 20B of the lower back panel 20 and the front surface of the front wall portion 30B of the jack-up bracket 30 below the inclined portion 20C. Yes.

  The reinforcing bracket 50 includes a plate-like central portion 50A, a first flange 50B formed by bending the front end of the central portion 50A, and a second flange 50C formed by bending the rear end of the central portion 50A. Have. The central portion 50 </ b> A is inclined rearward and downward so as to form a closed space having a triangular cross section along with the lower back panel 20 and the jack-up bracket 30. And the 1st flange 50B is joined to the lower surface front of central part 20B, and the 2nd flange 50C is joined to the front of front wall part 30B.

  Here, the jackup structure 10 is configured including the lower back panel 20, the jackup bracket 30, and the reinforcing bracket 50. In addition, when the vehicle 12 is a small vehicle and lightweight, or when the vertical length of the jack-up bracket 30 can be set short, the lower back panel 20 and the jack-up bracket 30 are jacked up without including the reinforcing bracket 50. The partial structure 10 may be configured.

  Next, the jackup structure 180 of the comparative example will be described.

  FIG. 9A shows a jack-up portion structure 180 of a comparative example. The jack-up portion structure 180 includes a lower back panel 182 and a jack-up bracket 186. Specifically, in the jack-up portion structure 180, a rear floor panel 184 is joined to the front surface of the lower end portion of the lower back panel 182 that stands upright, and a joint portion 186A of the jack-up bracket 186 is joined to the rear surface of the lower end portion. (The joint position between the lower back panel 182 and the joint 186A is PA).

  In the jack-up portion structure 180, the lower end of the lower back reinforcement 188 is joined to the rear surface of the lower back panel 182 at a position higher than the joining position PA in the lower back panel 182. The joint surface N between the lower back panel 182 and the joint portion 186A is perpendicular to the ground G in a state where the rear tire T (see FIG. 1) of the vehicle 12 has landed on the ground G (see FIG. 3). Arranged in the direction.

  The jack-up bracket 186 includes a joint portion 186A that stands upright, a bottom portion 186B that is formed in a predetermined width from the lower end of the joint portion 186A to the rear of the vehicle 12 (see FIG. 1), and a rear end of the bottom portion 186B. A rear wall portion 186 </ b> C that is inclined to the lower back reinforcement 188. The jack-up bracket 186 has a joining portion 186A joined to the lower back panel 182 and an upper end of the rear wall portion 186C joined to the lower back reinforcement 188.

  Moreover, the jack-up point Q lifted with the jack 60 is preset in the bottom part 186B. The jack-up point Q is illustrated as the center position of the width of the bottom portion 186B in the front-rear direction of the vehicle 12 (see FIG. 1).

  Here, when the vehicle 12 provided with the jack-up portion structure 180 of the comparative example is jacked up with the jack 60 (at the start of jack-up), the force F3 acting on the jack-up point Q is applied to the joining position PA as a shear input. Works. At this time, the force for peeling the jack-up bracket 186 from the lower back panel 182 (hereinafter referred to as the peeling component force) hardly acts on the bottom portion 186B.

  Subsequently, as shown in FIG. 9B, when the vehicle 12 provided with the jack-up portion structure 180 of the comparative example is jacked up (at the end of jack-up), the upper part of the joint surface N is inclined forward, The peeling component force F4 acts on the bottom 186B of the jack-up bracket 186. For this reason, it is conceivable that the force of the peeling component acts on the joining position PA, and the jack-up bracket 186 peels from the lower back panel 182 as indicated by a broken line.

(Function)
Next, the operation of the first embodiment will be described.

(Before jacking up)
As shown in FIG. 2, in the state before the jack-up where all the tires of the vehicle 12 (see FIG. 1) have arrived on the ground G (see FIG. 3), as shown in FIG. A line K extending in the rear direction of the vehicle 12 is defined as a line K. On the line K, the rear end position of the bottom portion 30 </ b> C is a point A, and the lower surface center position of the lower end portion 44 </ b> C of the bumper cover 44 is a point B. A point C is defined as an intersection of a perpendicular line and a line K passing through the point B to the line K. Furthermore, the length of the line segment AC is L2 (<L1 (see FIG. 1)), and the size of the corner CAB is the viewing angle α1.

  On the other hand, the jack-up bracket 200 of the comparative example is shown by a broken line in FIG. The jack-up bracket 200 is joined to the lower back reinforcement 22 without being joined to the inclined portion 20 </ b> C, and stands upright from the lower back reinforcement 22. It is assumed that the lower surface 200A of the jack-up bracket 200 is on the same plane as the lower surface 30F of the jack-up bracket 30. A rear end position of the lower surface 200A on the line K is set as a point D. Further, the length of the line segment DC is L3 (<L2), and the size of the corner CDB is the viewing angle α2.

  Here, the bottom portion 30C of the jack-up bracket 30 is disposed in front of the bottom portion (lower surface 200A) of the jack-up bracket 200 of the comparative example, and the length L2 is longer than the length L3. Yes. Therefore, when the lower side of the bumper cover 44 is viewed from the rear of the vehicle 12 (see FIG. 1), the viewing angle α1 at which the lower end of the jackup bracket 30 can be seen is the viewing angle at which the lower end of the jackup bracket 200 of the comparative example can be seen. It becomes smaller than α2.

  Thus, the jack-up bracket 30 of the present embodiment has a jack-up point PJ (see FIG. 1) closer to the front of the vehicle 12 than the jack-up bracket 200 of the comparative example. For this reason, it becomes difficult to see the jack-up bracket 30 from the rear of the vehicle 12, and the appearance from the rear of the vehicle 12 can be improved.

  Further, when the jack-up point PJ is close to the front of the vehicle 12, a gap between the jack-up bracket 30 and the bumper cover 44 is widened. Thereby, as shown in FIG. 1, when the jack plate 60 </ b> A of the jack 60 is brought into contact with the jack-up bracket 30, the jack plate 60 </ b> A is not brought into contact with the jack-up bracket 30.

(When jacking up)
As shown in FIG. 4A, when jacking up the rear portion of the vehicle 12, the jack 60 is operated after the upper surface of the jack plate 60A is brought into contact with the bottom 30C (jack-up point PJ) of the jack-up bracket 30. And lift the jack-up bracket 30 upward.

  At this time, in the jack-up portion structure 10, the joint surface Ma is arranged to be inclined toward the front lower side of the vehicle 12. For this reason, when the jackup bracket 30 is gradually pushed up by the jack 60, the inclination angle of the joint surface Ma with respect to the vertical surface (surface perpendicular to the ground G) gradually decreases. Then, as shown in FIG. 3, when the joint surface Ma is parallel (or nearly parallel) to the vertical line V indicating the vertical surface, the rear tire T (see FIG. 1) of the vehicle 12 is separated from the ground G. It becomes exchangeable.

  Here, as shown in FIG. 4B, when the joint surface Ma is parallel to or substantially parallel to the vertical surface, the bottom 30C of the jack-up bracket 30 (position PK is the pushed-up position). ) Is applied to the joint 30A (joint positions P1, P2) as a shear input substantially parallel to the joint surface Ma. And the peeling force F2 (peeling component) to the peeling direction (back) which becomes a perpendicular | vertical direction with respect to the joint surface Ma reduces compared with the state in the middle of jackup.

  Further, as shown in FIG. 1, in the jackup structure 10, the jackup point PJ of the jackup bracket 30 is set (placed) in front of the vehicle 12 with respect to the joining positions P1 and P2. Therefore, when the vehicle 12 is jacked up, the push-up force by the jack 60 pushes the joint portion 30A toward the inclined portion 20C until the joint surface Ma becomes parallel to the vertical surface (perpendicular line V). Acts as With these actions, the jackup structure 10 can prevent the jackup bracket 30 from peeling from the lower back panel 20 when the vehicle 12 is jacked up.

  When the jack-up point PJ (or the push-up position PK (see FIG. 4B)) is set as the intersection point PM, the intersection point PM and the joining positions P1 and P2 are arranged on the vertical plane when jacking up. Thereby, since only the shearing force is input to the joining positions P <b> 1 and P <b> 2, it is possible to further suppress the jack-up bracket 30 from peeling from the lower back panel 20.

  Further, in the jack-up portion structure 10, when the vehicle 12 having a large weight in which a large shearing force acts on the joint portion (joint position P1, P2) between the inclined portion 20C and the joint portion 30A is jacked up, the reinforcing bracket 50 is sheared. Bears some of the power. As a result, the shearing force acting on the joint portion between the inclined portion 20C and the joint portion 30A is reduced, and a heavy vehicle body can be jacked up.

(Second Embodiment)
Next, an example of the jackup part structure according to the second embodiment of the present invention will be described. Note that the same reference numerals as those in the first embodiment are given to the members that are basically the same as those in the first embodiment described above, and the description thereof is omitted.

  FIG. 5 shows a jackup structure 70 according to the second embodiment. The jack-up portion structure 70 is provided in the vehicle 12 in place of the jack-up portion structure 10 (see FIG. 1), and includes a lower back panel 72, a jack-up bracket 80, and a reinforcing bracket 90. If the vehicle 12 is a small vehicle and lightweight, or if the vertical length of the jackup bracket 80 can be set short, the lower back panel 72 and the jackup bracket 80 are jacked up without including the reinforcing bracket 90. The partial structure 70 may be configured.

  The vehicle 12 of the second embodiment is a floor member as an example of a vehicle body and is provided with a plate-like rear floor panel 18 (floor pan) at the lower part of the trunk room 14.

  The rear floor panel 18 includes a main body portion 18A that extends in the front-rear direction and the vehicle width direction of the vehicle 12, and a bent portion 18B that is bent upward at the rear end of the main body portion 18A. Further, both ends of the rear floor panel 18 in the vehicle width direction are respectively supported (fixed) by rectangular tubular side members (not shown), and the side members extend along the front-rear direction at both ends of the vehicle 12 in the vehicle width direction. Are arranged. And the lower back panel 72 (lower back) is joined to the bending part 18B.

  The lower back panel 72 is disposed on the rear end side of the rear floor panel 18 and extends along the vehicle width direction and the vehicle vertical direction. Further, the lower back panel 72 has a configuration in which a flange portion 72A, a central portion 72B, an inclined portion 72C, and an upright portion 72D are integrated in this order from the front to the rear of the vehicle 12. In addition, illustration and description above the upper part 72D of the lower back panel 72 are omitted.

  The central portion 72B is a portion that is slightly inclined to the front lower side of the vehicle 12, and the flange portion 72A is bent downward from the front end (lower end) of the central portion 72B in the front-rear direction of the vehicle 12. It is a part.

  The inclined portion 72C is a portion that is inclined from the rear end of the central portion 72B in the front-rear direction of the vehicle 12 to the rear upper side. In other words, the inclined portion 72C is directed from the lower end of the raised portion 72D to the front lower side of the vehicle 12. It is an inclined part. The upright portion 72 </ b> D is a portion raised upward from the rear end (upper end) of the inclined portion 72 </ b> C in the front-rear direction of the vehicle 12.

  In addition, the inclined portion 72C is set to satisfy 5 ° ≦ θ ≦ 45 ° as an example, where θ is the forward inclination angle with respect to the perpendicular V (see FIG. 3). Here, in consideration of workability, the inclination angle θ is preferably set within a range of 10 ° to 30 °.

  On the other hand, the flange portion 72A is joined to the bent portion 18B of the rear floor panel 18. Further, a flange 22A of the lower back reinforcement 22 for reinforcing the lower back panel 72 is joined to the rear surface (the rear surface in the front-rear direction) of the upper portion of the inclined portion 72C.

  One end of a jack-up bracket 80 (joint portion 80A and upper wall portion 80B described later) is joined to the lower rear surface of the inclined portion 72C and the lower surface of the central portion 72B in the lower back panel 72, and in the lower back reinforcement 22 The other end (an upright portion 80G described later) of the jack-up bracket 80 is joined to the lower rear surface of the upright portion 22C.

  The jack-up bracket 80 includes a joining portion 80A, an upper wall portion 80B, an inclined wall portion 80C, a front wall portion 80D, a bottom portion 80E, and a rear wall in the counterclockwise direction from the left side (vehicle front) to the right side (vehicle rear). The portion 80F and the upright portion 80G are integrated in this order. The length of the jack-up bracket 80 in the vehicle width direction is considerably shorter than the length of the lower back panel 72 so as to be placed on the jack plate 60A.

  Similar to the inclined portion 72C of the lower back panel 72, the joint portion 80A is a portion inclined to the lower front side of the vehicle 12, and the forward inclination angle with respect to the perpendicular V is θ. The front surface (front surface in the front-rear direction) of the joint portion 80A is joined to the lower rear surface of the inclined portion 72C.

  Here, in FIG. 1, the joining position between the inclined portion 72C and the joining portion 80A is indicated by an X mark. In this embodiment, as an example, one joining surface Mb between the inclined portion 72C and the joining portion 80A is provided. A joining position P3 is set. In addition, although the joining position P3 is set at a plurality of locations at intervals in the vehicle width direction on the joining surface Mb, illustration and description of the joining position in the vehicle width direction are omitted.

  The upper wall portion 80B is a portion slightly inclined from the lower end of the joint portion 80A toward the front lower side of the vehicle 12. The upper surface of the upper wall portion 80B is bonded to the lower surface of the central portion 72B of the lower back panel 72 (this bonding position is referred to as a bonding position P4). The inclined wall portion 80C is a portion inclined from the lower end (front end) of the upper wall portion 80B toward the front lower side of the vehicle 12, and the inclination angle is larger than the inclination angle of the upper wall portion 80B.

  The front wall portion 80D is a portion standing downward from the lower end of the inclined wall portion 80C, and the vertical length of the front wall portion 80D is a viewing angle (not shown) at which the bottom portion 80E is visually recognized from the rear of the vehicle 12. It is set based on. The front surface of the front wall portion 80D is joined to the rear surface of the flange portion 72A of the lower back panel 72.

  The bottom 80E is formed with a preset width from the lower end of the front wall 80D to the rear of the vehicle 12. Further, a jack-up point PJ that is lifted by the jack 60 is set in advance at the bottom 80E. In the present embodiment, as an example, the jack-up point PJ is illustrated as the center position (bisected position) of the width of the bottom portion 80E in the front-rear direction of the vehicle 12.

  As an example, the jack-up point PJ in the second embodiment is set (placed) in front of the vehicle 12 with respect to the joining position P3. Specifically, the jack-up point PJ of the second embodiment is set at a position that is a distance d2 (> d1) ahead of the vehicle 12 from the joint position P3. That is, in the jack-up portion structure 70 of the second embodiment, the distance from the joining position in the front-rear direction of the vehicle 12 to the jack-up point PJ is larger than the jack-up portion structure 10 (see FIG. 1) of the first embodiment. It is getting longer. In the longitudinal direction of the vehicle 12, the distance from the upright portion 44A of the bumper cover 44 to the jack-up point PJ is L4 (> L1).

  In the present embodiment, as an example, the jack-up point PJ is set at a distance d2 ahead of the vehicle 12 from the joint position P3. However, the jack-up point PJ is a broken line Lb indicating the inclination direction of the joint surface Mb. It is particularly preferable that the above is set. That is, it is particularly preferable to set the jackup point PJ at the intersection PM between the upper surface of the jack plate 60A of the jack 60 (the surface on which the bottom 80E of the jackup bracket 80 is placed) and the broken line Lb. Here, the interval between the jackup point PJ and the intersection point PM in the second embodiment is shorter than the interval between the jackup point PJ and the intersection point PM in the first embodiment, and the jackup point PJ and the intersection point PM Are placed close together.

  The rear wall portion 80F is a portion that is inclined from the rear end of the bottom portion 80E to the rear upper side. The rear wall 80 </ b> F has an upper end extending to the vicinity of the lower end of the raised portion 22 </ b> C of the lower back reinforcement 22. The upright portion 80G is a portion raised upward from the rear end (upper end) of the rear wall portion 80F. The front surface of the upright portion 80G is joined to the rear surface of the raised portion 22C of the lower back reinforcement 22.

  The reinforcing bracket 90 has a structure in which a single plate material is bent in an L shape, and has a flat plate-like projecting portion 90A projecting forward of the vehicle 12 and a lower portion from the rear end of the projecting portion 90A. And an upright portion 90B that stands upright. The upper surface of the projecting portion 90A is joined to the lower surface of the main body portion 18A of the rear floor panel 18, and the rear surface of the upright portion 90B is joined to the front surface of the front wall portion 80D of the jackup bracket 80.

(Function)
Next, the operation of the second embodiment will be described.

(Before jacking up)
As shown in FIG. 5, in the jack-up portion structure 70, the distance L4 from the upright portion 44A of the bumper cover 44 to the jack-up point PJ in the longitudinal direction of the vehicle 12 is the distance L1 of the first embodiment (see FIG. 1). It is even longer than. A gap between the jack-up bracket 80 and the bumper cover 44 is widened. Accordingly, when the jack plate 60A is brought into contact with the jack-up bracket 80, the jack plate 60A is not brought into contact with the bumper cover 44, so that the arrangement work of the jack plate 60A can be easily performed.

(When jacking up)
As shown in FIG. 5, when jacking up the rear portion of the vehicle 12 in the jackup structure 70, after bringing the upper surface of the jack plate 60 </ b> A into contact with the bottom 80 </ b> E (jackup point PJ) of the jackup bracket 80, The jack 60 is operated to lift the jack up bracket 80 upward.

  At this time, in the jack-up portion structure 70, the joint surface Mb is inclined to the front lower side of the vehicle 12. For this reason, when the jack-up bracket 80 is gradually pushed up by the jack 60, the inclination angle of the joint surface Mb with respect to the vertical surface (not shown) gradually decreases. When the joining surface Mb becomes parallel (or nearly parallel) to the vertical surface, the rear tire T (see FIG. 1) of the vehicle 12 is separated from the ground G (see FIG. 3) and can be replaced.

  Here, as shown in FIG. 6, when the joining surface Mb is parallel to the vertical surface (not shown) or substantially parallel, the bottom 80E (position PK) of the jack-up bracket 80 is formed. The input push-up force F5 acts on the joint 80A (joint position P3) as a shear input substantially parallel to the joint surface Mb. And the peeling force F6 (peeling component) to the peeling direction (back) which becomes a perpendicular | vertical direction with respect to the joint surface Mb reduces compared with the state in the middle of jack-up.

  Further, as shown in FIG. 5, in the jackup structure 70, the jackup point PJ of the jackup bracket 80 is set (placed) in front of the vehicle 12 with respect to the joining position P3 and the joining position P4. Therefore, when the vehicle 12 is jacked up, the push-up force by the jack 60 pushes the joint portion 80A against the inclined portion 72C and the upper wall portion 80B is pushed until the joint surface Mb becomes parallel to the vertical surface. It acts as a pressing force on the central portion 72B. With these actions, the jackup structure 70 can suppress the jackup bracket 80 from peeling from the lower back panel 72 when the vehicle 12 is jacked up.

  In the jackup structure 70, when the jackup point PJ (or the push-up position PK (see FIG. 6)) is set to the intersection point PM, the intersection point PM and the joining position P3 are arranged on the vertical plane at the time of jackup. The Thereby, since only the shearing force is input to the joining position P3, it is possible to further suppress the jackup bracket 80 from being peeled from the lower back panel 72.

  Further, in the jack-up portion structure 70, when the vehicle 12 having a large weight in which a large shear force acts on the joint portion (joint position P3) between the inclined portion 72C and the joint portion 80A is jacked up, the reinforcing bracket 90 has a shear force. Pay some. As a result, the shear force acting on the joint portion between the inclined portion 72C and the joint portion 80A is reduced, and a heavy vehicle body can be jacked up.

(Third embodiment)
Next, an example of the jackup structure according to the third embodiment of the present invention will be described. Note that the same reference numerals as those in the first and second embodiments are given to the same members as those in the first and second embodiments described above, and the description thereof is omitted.

  FIG. 7 shows a jackup structure 100 according to the third embodiment. The jack-up portion structure 100 is provided in the vehicle 12 instead of the jack-up portion structure 10 (see FIG. 1), and includes a lower back panel 102, a jack-up bracket 110, and a reinforcing bracket 90. If the vehicle 12 is a small vehicle and lightweight, or if the vertical length of the jack-up bracket 110 can be set short, the lower back panel 102 and the jack-up bracket 110 are jacked up without including the reinforcing bracket 90. The partial structure 100 may be configured.

  The lower back panel 102 is disposed on the rear end side of the rear floor panel 18 and extends along the vehicle width direction and the vehicle vertical direction. Further, the lower back panel 102 has a configuration in which a flange portion 102A, an inclined portion 102B, and an upright portion 102C are integrated in this order from the front to the rear of the vehicle 12. In addition, illustration and description above the upper part 102C of the lower back panel 102 are omitted.

  The flange portion 102 </ b> A is an example of a joined portion, and is upright and has a front surface joined to the rear surface of the bent portion 18 </ b> B of the rear floor panel 18. Further, the flange portion 102A is arranged upright in the vertical direction (vertical direction) of the vehicle 12 below the inclined portion 102B of the lower back panel 102. That is, the flange portion 102 </ b> A is disposed so as to be inclined or upright at an angle smaller than the inclination angle θ of the inclined portion 102 </ b> B with respect to the vertical direction of the vehicle 12.

  The inclined portion 102B is a portion inclined from the upper end of the flange portion 102A to the upper rear side, in other words, a portion inclined from the lower end of the raised portion 102C to the lower front side of the vehicle 12. The rising portion 102C is a portion raised upward from the upper end of the inclined portion 102B.

  In addition, the inclined portion 102B is set to satisfy 5 ° ≦ θ ≦ 45 ° as an example, where θ is the forward inclination angle with respect to the perpendicular V (see FIG. 3). Here, in consideration of workability, the inclination angle θ is preferably set within a range of 10 ° to 30 °. Further, a flange portion 22A of the lower back reinforcement 22 for reinforcing the lower back panel 102 is joined to the rear surface (the rear surface in the front-rear direction) of the upper portion of the inclined portion 102B.

  On the other hand, one end of a jack-up bracket 110 (joint part 110A and front wall part 110B described later) is joined to the rear face of the flange part 102A and the lower rear face of the inclined part 102B in the lower back panel 102, and lower back reinforcement. 22 is joined to the lower rear surface of the upright portion 22C at the other end (an upright portion 110E described later) of the jack-up bracket 110.

  The jack-up bracket 110 includes a joint portion 110A, a front wall portion 110B, a bottom portion 110C, a rear wall portion 110D, and an upright portion 110E in a counterclockwise direction from the left side (front of the vehicle) to the right side (rear side of the vehicle). The structure is integrated in order. The length of the jack-up bracket 110 in the vehicle width direction is considerably shorter than the length of the lower back panel 102 so as to be placed on the jack plate 60A.

  The joint portion 110A is a portion inclined to the front lower side of the vehicle 12 like the inclined portion 102B of the lower back panel 102, and the forward inclination angle with respect to the perpendicular V is θ. The front surface of the joint portion 110A is joined to the rear surface of the inclined portion 102B.

  Here, in FIG. 7, the joining position between the inclined portion 102B and the joint portion 110A is indicated by an X, and as an example in the present embodiment, two joint surfaces Mc between the inclined portion 102B and the joint portion 110A are provided. Joining positions P5 and P6 are set. The joining position P5 is set in front of the joining position P6 in the front-rear direction of the vehicle 12. In addition, although the joining positions P5 and P6 are set at a plurality of locations at intervals in the vehicle width direction on the joining surface Mc, illustration and description are omitted.

  The front wall portion 110B is a portion that stands vertically downward from the lower end of the joint portion 110A, and the length of the front wall portion 110B in the vertical direction is a viewing angle (not shown) at which the bottom portion 110C is visually recognized from the rear of the vehicle 12. Set based on. The front surface of the front wall portion 110B is joined to the rear surface of the flange portion 102A of the lower back panel 102.

  The bottom portion 110C is formed with a preset width from the lower end of the front wall portion 110B to the rear of the vehicle 12. Further, a jack-up point PJ to be lifted by the jack 60 is set in advance on the bottom portion 110C. In the present embodiment, as an example, the jack-up point PJ is illustrated as the center position (bisected position) of the width of the bottom portion 110 </ b> C in the front-rear direction of the vehicle 12.

  The jack-up point PJ in the third embodiment is set (placed) in front of the vehicle 12 with respect to the joining position P6 as an example. Specifically, the jack-up point PJ of the third embodiment is set at a position that is a distance d3 (<d1) ahead of the vehicle 12 from the joint position P6 in the front-rear direction of the vehicle 12. That is, in the jack-up portion structure 100 of the third embodiment, the distance from the joining position in the front-rear direction of the vehicle 12 to the jack-up point PJ is larger than the jack-up portion structure 10 (see FIG. 1) of the first embodiment. It is getting shorter. Further, in the longitudinal direction of the vehicle 12, the distance from the upright portion 44A of the bumper cover 44 to the jack-up point PJ is L5 (<L1).

  The rear wall portion 110D is a portion that is inclined from the rear end of the bottom portion 110C to the upper rear side. The rear wall portion 110 </ b> D has an upper end extending to the vicinity of the lower end of the rising portion 22 </ b> C of the lower back reinforcement 22. The upright portion 110E is a portion raised upward from the rear end (upper end) of the rear wall portion 110D. The front surface of the upright portion 110 </ b> E is joined to the rear surface of the upright portion 22 </ b> C of the lower back reinforcement 22.

  In the reinforcing bracket 90, the upper surface of the overhanging portion 90A is joined to the lower surface of the main body portion 18A of the rear floor panel 18, and the rear surface of the upright portion 90B is joined to the front surface of the front wall portion 110B of the jackup bracket 110.

(Function)
Next, the operation of the third embodiment will be described.

(Before jacking up)
As shown in FIG. 7, in the jackup structure 100, the distance L5 from the upright portion 44A of the bumper cover 44 to the jackup point PJ in the front-rear direction of the vehicle 12 is the distance L1 of the first embodiment (see FIG. 1). The length is slightly shorter than that. For this reason, the gap between the jack-up bracket 110 and the bumper cover 44 is wide, and when the jack plate 60A of the jack 60 is brought into contact with the jack-up bracket 110, the bumper cover 44 is not contacted. Can be done.

(When jacking up)
As shown in FIG. 7, when jacking up the rear portion of the vehicle 12 in the jackup structure 100, the upper surface of the jack plate 60 </ b> A is brought into contact with the bottom 110 </ b> C (jackup point PJ) of the jackup bracket 110. The jack 60 is operated to lift the jack up bracket 110 upward.

  At this time, in the jackup structure 100, the joint surface Mc is inclined to the front lower side of the vehicle 12. For this reason, when the jack-up bracket 110 is gradually pushed up by the jack 60, the inclination angle of the joint surface Mc with respect to the vertical surface (not shown) gradually decreases. When the joint surface Mc becomes parallel (or nearly parallel) to the vertical surface, the rear tire T (see FIG. 1) of the vehicle 12 is separated from the ground G (see FIG. 3) and can be replaced.

  Here, as shown in FIG. 8, when the joint surface Mc is parallel to or substantially parallel to the vertical surface (not shown), the bottom 110C (position PK) of the jack-up bracket 110 is formed. The input push-up force F7 acts on the joint 110A (joint positions P5 and P6) as a shear input substantially parallel to the joint surface Mc. And the peeling force F8 (peeling component) to the peeling direction (back) which becomes a perpendicular | vertical direction with respect to the joint surface Mc reduces compared with the state in the middle of jackup.

  Further, as shown in FIG. 7, in the jackup structure 100, the jackup point PJ of the jackup bracket 110 is set (placed) in front of the vehicle 12 at least from the joining position P6. For this reason, when the vehicle 12 is jacked up, the push-up force by the jack 60 acts as a force pushing the joint portion 110A to the inclined portion 102B until the joint surface Mc becomes parallel to the vertical surface. Due to these actions, it is possible to suppress the jackup bracket 110 from peeling from the lower back panel 102 when the vehicle 12 is jacked up.

  In the jackup structure 100, when the jackup point PJ (or the push-up position PK (see FIG. 8)) is set to the intersection point PM, the intersection point PM and the joining positions P5 and P6 are displayed on the vertical plane at the time of jackup. Be placed. Thereby, since only the shearing force is input to the joining positions P5 and P6, it is possible to further suppress the jack-up bracket 110 from being peeled from the lower back panel 102.

  Further, in the jack-up portion structure 100, the lower portion of the lower back panel 102 than the inclined portion 102B is an upright flange portion 102A. For this reason, the spare tire S is less likely to be caught on the lower back panel 102 compared to the configuration in which the lower portion of the inclined portion 102B is inclined forward at an inclination angle larger than that of the inclined portion 102B. The mounting height of the spare tire S to be mounted (the height from the upper surface of the rear floor panel 18 to the upper surface of the spare tire S) can be reduced.

  Further, in the jack-up portion structure 100, when the vehicle 12 having a large weight in which a large shearing force acts on the joint portion (joint position P5, P6) between the inclined portion 102B and the joint portion 110A is jacked up, the reinforcing bracket 90 is sheared. Bears some of the power. As a result, the shearing force acting on the joint portion between the inclined portion 102B and the joint portion 110A is reduced, and a heavy vehicle body can be jacked up.

  In addition, this invention is not limited to said embodiment.

  As described above, when the vehicle 12 is a small car and lightweight, or when the vertical length of the reinforcement bracket can be set short, the reinforcement bracket is not included and the jack-up portion structure is formed by the lower back panel and the jack-up bracket. May be configured.

  Further, in the jack-up portion structure 100, a joined portion may be formed on the lower side of the inclined portion 102B with an inclination angle with respect to the vertical plane being smaller than that of the inclined portion 102B.

  Further, the jack-up brackets 30, 80, 110 may be formed in a box shape with side walls provided in the vehicle front-rear direction and the vehicle width direction.

10 Jack-up structure 12 Vehicle 16 Rear floor panel (an example of a vehicle body)
18 Rear floor panel (an example of a car body)
20 Lower back panel 20C Inclined portion 30 Jack-up bracket 30A Joint portion 50 Reinforcement bracket 60 Jack 70 Jack-up portion structure 72 Lower back panel 72C Inclined portion 80 Jack-up bracket 80A Joint portion 90 Reinforcement bracket 100 Jack-up portion structure 102 Lower back panel 102A Flange (an example of a part to be joined)
102B Inclined part 110 Jack-up bracket 110A Joint part P1 Joint position P2 Joint position P3 Joint position P5 Joint position P6 Joint position PJ Jack-up point

Claims (3)

An inclined portion that is disposed on the rear end side of the vehicle body and is provided at a lower portion of the lower back panel that extends along the vehicle width direction and the vehicle up-down direction, and is inclined to the vehicle front lower side;
A jack-up bracket provided with a joining portion joined to the inclined portion at at least one joining position, wherein a jack-up point lifted by a jack is set at the front of the vehicle with respect to at least one joining position;
A reinforcing bracket provided below the inclined portion in the vehicle vertical direction, one end joined to the lower back panel or the vehicle body, and the other end joined to the jack-up bracket;
Jack-up part structure having Wherein the lower side of the inclined portion of the lower back panel, bonding portion standing upright tilted or the vehicle vertical direction at an angle smaller than the inclination angle of the inclined portion with respect to the vehicle vertical direction is formed, the object to be bonded The jack-up part structure according to claim 1 , wherein the vehicle body is joined to a part. An inclined portion that is disposed on the rear end side of the vehicle body and is provided at a lower portion of the lower back panel that extends along the vehicle width direction and the vehicle up-down direction, and is inclined to the vehicle front lower side;
The lower back panel is formed below the inclined portion, is inclined at an angle smaller than the inclination angle of the inclined portion with respect to the vehicle vertical direction, or is upright in the vehicle vertical direction, and is joined to the vehicle body. And
A jack-up bracket provided with a joining portion joined to the inclined portion at at least one joining position, wherein a jack-up point lifted by a jack is set at the front of the vehicle with respect to at least one joining position;
Jack-up part structure having

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