JP5920162B2 - Upper car body structure of open car - Google Patents

Description

  The present invention relates to an upper car body structure of an open car, and more particularly to a roll bar structure in an open car.

  In an open car, a roll bar structure may be provided as a means for protecting an occupant during rollover. In general, as this roll bar structure, a roll bar having an inverted U-shape is provided behind the seat back at the rear of the vehicle so as to protrude upward.

  For example, Patent Document 1 has a roll bar structure including a roll bar having an inverted U-shape, and the upper part of the roll bar is provided so as to be parallel to the vehicle width direction behind the seat back. A roll bar structure is disclosed. Further, Patent Document 2 discloses a roll bar structure in which a roll bar having an inverted U-shape is laid so as to straddle a corner portion at the rear of the passenger compartment.

  Here, the roll bar structure in the open car has the front and rear positions set so as not to interfere with the seat at the rearmost position of the seat configured to have a desired front and rear movement amount, and the occupant at the time of rollover The height is set in consideration of protection performance.

  In an open car, an openable / closable roof member such as a hood or a retractable hard top is folded and retracted into the passenger compartment, and the folded roof member is stored at the rear of the passenger compartment. A roof member storage is provided. The roof member storage locus when the roof member is stored in the roof member storage portion is set so as not to interfere with the seat back and the roll bar structure. As a result, the roof member storage portion is located on the roof member storage locus. It will be located behind the rear deck. In other words, the roof member storage portion is provided on the rear deck behind the seat back and roll bar structure in consideration of the roof member storage locus.

JP 2005-186687 A JP 2007-62686 A

  By the way, in the open car having the above-described configuration, when it is attempted to reduce the front-rear dimension of the passenger compartment due to a request for compactness of the vehicle or a design, the position of the roof member storage portion is set in the vehicle front-rear direction. It is necessary to change whether to move forward or to shorten the longitudinal dimension of the roof member storage portion itself. However, as described above, the front and rear positions of the roof member storage portion are determined from the positional relationship between the seat, the roll bar structure, and the roof member storage locus, and therefore the roof member storage portion is moved forward in the vehicle front-rear direction alone. In addition, since the front and rear dimensions of the roof storage portion itself are determined by the length of the roof, it is difficult to reduce the size.

  For this reason, in order to shorten the longitudinal dimension of the passenger compartment, it is necessary to bring the roll bar structure and the roof member storage portion forward in the vehicle longitudinal direction by moving the rearmost position of the seat forward in the vehicle longitudinal direction. . As a result, it becomes difficult to secure a desired amount of forward and backward movement of the seat, and there arises a problem that it is difficult to provide an appropriate riding posture for passengers of various body types, particularly passengers of large body types. .

  In that case, in the roll bar structure disclosed in Patent Document 1, since the seat, the roll bar structure, and the roof member storage portion are arranged in order from the front, the center portion of the seat back and the top portion of the roll bar In the roll bar structure disclosed in Patent Document 2, the inner portion of the roll bar in the vehicle width direction greatly enters the inner side of the vehicle width direction behind the seat. The center portion of the roll and the top portion of the roll bar are in a positional relationship that is almost directly opposed.

  That is, in both cases, since the top portion of the roll bar and the central portion of the seat back are in a positional relationship facing the vehicle longitudinal direction, only the roll bar is moved forward in the vehicle longitudinal direction without bringing the seat forward in the vehicle longitudinal direction. It is difficult to get to. Accordingly, the roll bar moves the roof member storage portion forward in the vehicle front-rear direction while ensuring the desired amount of front-rear movement of the seat based on the rearmost position of the seat, thereby shortening the front-rear dimension of the passenger compartment. Hinder.

  The present invention has been made to solve the above-described problem, that is, to obtain a roll bar structure capable of shortening the front-rear dimension of the passenger compartment while ensuring a desired front-rear movement amount of the seat. Objective.

  In order to solve the above problems, the present invention is configured as follows.

First, the invention according to claim 1 of the present application is an upper car body structure of an open car in which a roof member storage portion is provided on a rear deck behind a seat in a vehicle interior, and the roof member is pivotally stored in the storage portion. A vehicle outer leg portion located on the vehicle outer side of the seat back constituting the seat in front of the roof member storage portion in the vehicle front-rear direction, and a vehicle of the seat back at the rear of the seat back in the vehicle front-rear direction. An inverted U-shaped roll bar having a vehicle inner side leg located on the vehicle outer side than the center in the width direction is arranged on the left and right, and the upper part of the roll bar is bent forward in the vehicle front-rear direction and on the vehicle inner side. It is characterized by that.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the vehicle inner leg is located on the vehicle outer side than a headrest provided at an upper center of the seat back. .

According to a third aspect of the present invention, in the first or second aspect of the present invention, the vehicle outer leg and the vehicle inner leg extend substantially vertically up to the height of the shoulder portion of the seat back. It is characterized by.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the lower part of the outer leg portion of the roll bar is located on the side wall of the vehicle body located outside the car. It is connected via a connecting member.

  First, according to the first aspect of the present invention, the outer leg portion of the roll bar is disposed on the side of the seat back, and the inner leg portion of the roll bar is disposed on the outer side of the center portion of the seat back. Therefore, the top of the roll bar that connects both legs in an inverted U-shape is more forward in the vehicle longitudinal direction than the top of the roll bar according to the conventional roll bar structure while avoiding the center part of the seat back to the outside of the vehicle. Will be located. With this arrangement, the roof member storage part can be moved forward in the vehicle front-rear direction.

  That is, the seat back is generally tallest at the center in the vehicle width direction, and accordingly, the center of the seat back projects most backward in plan view. Therefore, if the roll bar is positioned in front of the vehicle front-rear direction, the top of the roll bar and the roof can be avoided by avoiding the roll bar from facing the vehicle front-rear direction to the center of the seat back that protrudes most backward. A gap with the member storage locus can be enlarged.

  As a result, it is possible to move the roof member storage locus forward in the vehicle longitudinal direction and move the roof member storage portion forward in the vehicle longitudinal direction without moving the rearmost position of the seat forward in the vehicle longitudinal direction. Therefore, according to the present invention, the front-rear dimension of the passenger compartment can be shortened while ensuring the desired front-rear movement amount of the seat.

  Furthermore, since the top of the roll bar is positioned outside the center of the seat back, the timing at which the top of the roll bar contacts an obstacle when the vehicle rolls over can be improved, thereby improving occupant protection performance. it can.

Further, the vehicle leg of the roll bar is located on the side of the seat back, and the vehicle inner leg is located behind the seat back in the vehicle front-rear direction. In other words, since both the leg portions are shifted from each other in the vehicle width direction and the vehicle front-rear direction, the roll bar can be applied even if an external force from either the vehicle width direction or the vehicle front-rear direction acts on the roll bar. Therefore, an effective support relationship is established between the vehicle outer leg and the vehicle inner leg, and it is always effective against external forces from either the vehicle width direction or the vehicle front-rear direction. Can withstand.
In addition, by bending the vehicle inner leg portion and inclining toward the front side in the vehicle longitudinal direction, the top of the roll bar is positioned above the shoulder portion of the front seat back without interfering with the seat back. Become. As a result, the gap between the top of the roll bar and the roof member storage locus can be further enlarged, so that the roof member storage locus can be further moved forward in the vehicle longitudinal direction and the roof member storage portion can be further moved forward in the vehicle longitudinal direction. It becomes possible.
Accordingly, the roof member storage portion can be moved forward in the vehicle front-rear direction without moving the rearmost position of the seat forward in the vehicle front-rear direction. It becomes possible to shorten the front and rear dimensions.

  According to the second aspect of the present invention, since the vehicle inner leg portion faces the shoulder portion of the seat back while avoiding the headrest portion at the upper portion of the seat back, the top portion of the roll bar is located on the side of the headrest. And it will be located ahead of the direction of vehicles order rather than the top part of the roll bar concerning the conventional roll bar structure. With this arrangement, the invention according to claim 1 can be easily achieved.

  That is, since the top of the roll bar is positioned in front of the roll bar in the vehicle longitudinal direction relative to the top of the roll bar according to the conventional roll bar structure, the gap between the top of the roll bar and the roof member storage locus can be expanded. It is possible to bring the storage locus forward in the vehicle front-rear direction. Accordingly, the roof member storage portion can be moved forward in the vehicle front-rear direction without moving the rearmost position of the seat forward in the vehicle front-rear direction. It becomes possible to shorten the front and rear dimensions.

  In addition, by setting the inner leg of the vehicle at a position that avoids the headrest of the seat back to the outer side of the vehicle, it is possible to avoid interference between the headrest and the inner leg of the roll bar when the seat is tilted backward. Can do.

  That is, since the seat back can be tilted backward to a position where the top of the roll bar and the shoulder portion of the seat back overlap in plan view, the amount of backward tilt of the seat back can be increased. Accordingly, since the seat can be tilted further backward even at the rearmost position of the seat, it is possible to provide an appropriate driving posture even for a passenger with a larger body shape.

According to the third aspect of the present invention, the vehicle outer leg extends up and down to the height of the shoulder portion of the seat back, so that the vehicle outer leg extends to the height of the shoulder portion on the side of the seat back. The part will be located. As a result, the vehicle leg of the roll bar reliably resists the side impact load at the time of a side impact, so that the side impact load is prevented from being directly transmitted to the seat, and the occupant protection performance can be improved.

According to the invention of claim 4 , since the roll bar is connected to the vehicle side wall, the support rigidity of the vehicle outer leg portion of the roll bar located outside the seat back can be increased. Since the proof strength of the bar structure is improved, the occupant protection performance at the time of vehicle rollover or side collision can be improved.

It is a perspective view showing the back part of vehicles provided with the upper body structure (roll bar structure) of the open car concerning the embodiment of the present invention. It is a principal part perspective view which shows the right side of the same roll bar structure. It is a principal part front view which shows the right side of the same roll bar structure. It is a principal part side view which shows the right side of the same roll bar structure. It is a principal part top view which shows the right side of the same roll bar structure. It is an expanded sectional view of the same roll bar structure in line VI-VI in FIG. It is a perspective view which shows the cross bar which comprises the same roll bar structure. It is a perspective view which shows the gusset which comprises the roll bar structure. It is a perspective view which shows the downward connection member which comprises the roll bar structure. It is a side view explaining the positional relationship of the storing locus | trajectory of a roof member, and a roll bar structure. It is a side view explaining the passenger protection space based on a roll bar structure. It is a front view explaining the passenger protection space based on a roll bar structure. FIG. 6 is a plan view showing a state where the seat back at the rearmost position of the seat is tilted most backward. FIG. 6 is a side view showing a state where the seat back at the rearmost position of the seat is tilted most backward. It is a perspective view which shows the rear part of the vehicle provided with the upper vehicle body structure of the open car which concerns on other embodiment of this invention.

  Hereinafter, an embodiment to which an upper car body structure of an open car according to the present invention is applied will be described.

  FIG. 1 is a perspective view showing a rear portion of a vehicle provided with an upper car body structure (roll bar structure) of an open car according to an embodiment of the present invention. As shown in FIG. 1, a vehicle 1 includes a floor panel 2 that constitutes a floor of a passenger compartment, a floor tunnel 4 that protrudes upward from the center of the floor panel 2 and extends in the vehicle front-rear direction, the floor panel 2 and A kick-up panel 6 that extends obliquely upward at the rear end of the floor tunnel 4, a rear deck 10 that extends from the upper end of the kick-up panel 6 to the rear of the vehicle and forms the floor of the roof member storage portion R, and the rear deck 10 A rear panel 12 that extends upward at the rear end of the vehicle and a pair of side panels 14 that extend in the vertical direction and constitute both side surfaces of the vehicle are provided.

  The floor panel 2 is provided with a front seat bracket (not shown) and a rear seat bracket (not shown) extending in the vehicle width direction on both the left and right sides of the floor tunnel 4, and the seat 20 is attached to these seat brackets. It is attached. The seat 20 is configured to be movable in the vehicle front-rear direction by a known mechanism, and has a seat back 22 that supports the upper body of the occupant. Furthermore, the seat back 22 is configured to be able to change the angle by a known mechanism, and has a headrest portion 222 that supports the head of the occupant at the upper center.

  Further, the vehicle 1 includes a roll bar structure 30 that surrounds the shoulder portion 224 on the vehicle exterior side of the seat back 22. The roll bar structure 30 includes a pair of left and right roll bars 32 having an inverted U-shape extending in the vertical direction, a cross bar 34 extending in the vehicle width direction between the pair of side panels 14, and the cross bar 34 and the side A pair of left and right gussets 36 that connect the panel 14 and a pair of left and right lower connecting members 38 that connect the roll bar 32 and the side panel 14 are provided.

  Next, the configuration of the roll bar 32 of the roll bar structure 30 will be described more specifically with reference to FIGS. 2 is a perspective view of the main part showing only the right side of the roll bar structure, FIG. 3 is a front view of the main part showing only the right side of the roll bar structure, and FIG. 4 shows only the right side of the roll bar structure. 5 is a side view of the main part, FIG. 5 is a plan view of the main part showing only the right side of the roll bar structure, and FIG. 6 is a cross-sectional view of the roll bar structure taken along line VI-VI in FIG.

  First, as shown in FIG. 2, the roll bar 32 is formed by forming one elliptical cross-section pipe in an inverted U shape, and is arranged so as to extend in the vertical direction. The roll bar 32 is located on the vehicle exterior side with respect to the vehicle outer side leg 322 located on the side of the seat back 22 and on the vehicle exterior side from the center in the vehicle width direction of the seat back 22 at the rear of the seat back 22 in the vehicle front-rear direction. A leg portion 324, and a top portion 326 that is largely bent in an inverted U shape so as to connect the vehicle outer side leg portion 322 and the vehicle inner side leg portion 324.

  As shown in FIG. 3, the vehicle outer leg 322 is bent from the vehicle outer leg vertical portion 322 a extending vertically to the height of the shoulder 224 of the seat back 22 and the height of the shoulder 224 of the seat back 22. A vehicle outer leg inclined portion 322b that is inclined toward the vehicle inner side. Further, as shown in FIG. 6, the vehicle outer leg portion 322 is arranged so that the vehicle outer leg vertical portion 322a is parallel to the longitudinal direction of the vehicle in the major axis direction of the elliptical cross section.

  As shown in FIG. 4, the vehicle inner leg 324 is bent from the vehicle inner leg vertical portion 324 a extending vertically to the height of the shoulder 224 of the seat back 22 and the height of the shoulder 224 of the seat back 22. And a vehicle interior leg inclined portion 324b that is inclined forward in the vehicle longitudinal direction. Further, as shown in FIG. 6, the vehicle inner leg 324 is arranged so that the vehicle inner leg vertical portion 324a is parallel to the vehicle width direction in the major axis direction of its elliptical cross section.

  As shown in FIG. 5, the vehicle outer leg 322 extends in the vehicle width direction and the vehicle inner leg 324 extends in the vehicle front-rear direction in plan view. That is, the vehicle outer leg 322 and the vehicle inner leg 324 are in a right-angled positional relationship, and the top 326 of the roll bar is formed so as to connect both the inclined portions 322b and 324b. Accordingly, the top portion 326 of the roll bar is located on the vehicle exterior side of the headrest portion 222 of the seat back 22 where the both leg portions 322 and 324 meet in a plan view and above the shoulder portion 224.

  2-5, the vehicle outer side leg part 322 is being fixed to the rear deck 10 with the volt | bolt via the flange 40 in the lower end part. Similarly, the vehicle inner leg 324 is also fixed to the rear deck 20 with a bolt via a flange 42 at the lower end thereof. Further, the vehicle interior leg vertical portion 324a penetrates the cross bar 34 vertically. The flange 40 and the flange 42 are joined to both leg portions 322 and 324 of the roll bar 32 by welding at the lower ends thereof.

  Next, the configuration of the cross bar 34 of the roll bar structure 30 will be specifically described with reference to FIG. FIG. 7 is a perspective view showing the crossbar 34. As shown in FIG. 7, the cross bar 34 has a rectangular closed cross-sectional structure. The cross bar 34 includes an upper wall portion 342, a lower wall portion 344, a front vertical wall portion 346, and a rear vertical wall portion 348. A pair of left and right bolt through holes 346a are formed in the upper and lower portions at both ends of the front vertical wall portion 346 of the cross bar 34.

  In addition, a pair of left and right openings 342a and 344a are formed in the upper wall portion 342 and the lower wall portion 344 of the cross bar 34 at positions on the inner side in the vehicle width direction than the bolt through hole 346a, and the openings 342a and 344a are formed in the openings 342a and 344a. The vehicle interior leg vertical part 324a of the roll bar 32 penetrates in the vertical direction.

  The sizes of the openings 342a and 344a are formed slightly larger than the elliptical cross section of the vehicle interior leg vertical portion 324a of the roll bar 32 so that the vehicle interior leg vertical portion 324a can be easily inserted. . Further, as will be described later, an appropriate gap relationship is established so that the vehicle outer leg vertical portion 324a and the upper wall portion 342 and the lower wall portion 344 of the cross bar 34 can be welded along the openings 342a and 344a. It is set to such a size.

  Next, the configuration of the gusset 36 of the roll bar structure 30 will be specifically described with reference to FIG. FIG. 8 is a perspective view showing the gusset 36. As shown in FIG. 8, the gusset 36 is a plate-like member having a U-shaped cross section that opens toward the front in the vehicle front-rear direction, and is a first straight portion 362 that extends in the vehicle front-rear direction at the vehicle outer end. And a second straight portion 364 extending in the vehicle width direction at the vehicle inner end portion, and a connecting portion 366 connecting the first straight portion 362 and the second straight portion 364.

  The first straight portion 362 and the second straight portion 364 of the gusset 36 are respectively formed with two bolt through holes 362a and 364a in the vertical direction. Further, the connecting portion 366 of the gusset 36 has an arc shape so as to protrude forward in the vehicle front-rear direction, and it interferes with the rear wheel house portion 142 protruding from the side panel 14 toward the vehicle interior side. It is avoiding.

  Next, the configuration of the lower connecting member 38 of the roll bar structure 30 will be specifically described with reference to FIG. FIG. 9 is a perspective view showing the lower connecting member 38. As shown in FIG. 9, the lower connecting member 38 includes a flange 382, a pipe 384, and a clamp portion 386. A plurality of bolt through holes 382 a are formed in the flange 382. The clamp portion 386 includes a pair of vehicle outer side clamps 386a and vehicle inner side clamps 386b that can be separated in the vehicle width direction, and through holes 46 are formed at both ends in the vehicle front-rear direction.

  The vehicle outer side clamp 386a and the vehicle inner side clamp 386b are plate-shaped members, and in the combined state, an opening 386c is formed, and the vehicle outer side leg vertical part 322a of the roll bar 32 extends in the vertical direction in the opening 386c. It is designed to penetrate.

  The size of the opening 386c is the same as or slightly smaller than the size of the vehicle outer leg vertical portion 322a of the roll bar 32 except for the joint portion of the pair of clamps 386a and 386b. The part vertical part 322a can be firmly gripped. The vehicle outer side clamp 386a and the vehicle inner side clamp 386b are respectively formed with a pair of bolt through holes at both ends in the front-rear direction. Further, the pipe 384 and the outside clamp 386a are joined by welding, and similarly, the flange 382 and the pipe 384 are joined by welding.

  Next, with reference to FIG.2 and FIG.3, the connection structure of the roll bar 32 and the cross bar 34 is demonstrated. As shown in FIG. 2, first, the vehicle interior leg vertical portion 324a of the roll bar 32 is inserted into the openings 342a and 344a formed in the upper wall portion 342 and the lower wall portion 344 of the cross bar 34 from above and predetermined. It penetrates to the position. Next, the vehicle inner leg vertical part 324a of the roll bar 32 and the upper wall part 342 and the lower wall part 344 of the cross bar 32 are welded over the entire circumference along the openings 342a and 344a as shown by F in FIG. Thus, the roll bar 32 and the cross bar 34 are firmly coupled.

  Next, a coupling structure of the cross bar 34, the gusset 36, and the side panel 14 will be described. As shown in FIG. 2, first, two upper and lower bolt through holes formed in the second straight portion 364 of the gusset 36 in the upper and lower two bolt through holes 346 a formed at one end of the front side wall portion 346 of the cross bar 34. 364a, the second straight portion 364 of the gusset 36 is brought into contact with the front vertical wall portion 346 of the cross bar 34, and the gusset 36 is connected to the gusset 36 through bolt through holes 346a and 364a using bolts and nuts extending in the front-rear direction. Is fastened to the cross bar 34.

  Next, the first straight portion 362 of the gusset 36 is brought into contact with the side panel 14 and the gusset 36 is used using bolts extending in the vehicle width direction through two upper and lower bolt through holes 362a formed in the first straight portion 362. Is fastened directly to the side panel 14.

  Next, a coupling structure of the roll bar 32, the lower connecting member 38, and the side panel 14 will be described. First, with the vehicle interior clamp 386b removed from the lower connection member 38, the vehicle exterior clamp 386a of the lower connection member 38 is brought into contact with the vehicle exterior leg vertical portion 322a of the roll bar 32. Next, the vehicle inner side clamp 386b of the lower connecting member 38 is aligned with the vehicle outer side clamp 386a so as to grip the vehicle outer side leg vertical portion 322a of the roll bar 32, and temporarily fixed with a bolt.

  Next, the flange 382 of the lower connecting member 38 is directly fastened to the side panel 14 using bolts via a plurality of bolt through holes 382a formed in the flange. Finally, the bolt that temporarily fixed the pair of clamps 386 is finally tightened.

  Next, the operation of this embodiment will be described. First, with reference to FIG. 10, it will be described that the roof member storage locus is moved forward in the vehicle longitudinal direction. FIG. 10 is a side view for explaining the positional relationship between the storage locus of the roof member and the roll bar structure. A thick line indicates the roll bar structure 30 according to this embodiment and the storage locus 52 of the roof member 50, and a thin line indicates the conventional relationship. The roll bar structure 70 and the storage locus 82 of the roof member 80 are shown.

  As shown in FIG. 10, the vehicle outer side leg portion 322 of the roll bar 32 is disposed on the side of the seat back 22, and the vehicle inner side leg portion 324 is located behind the seat back 22 in the vehicle front-rear direction and more than the headrest portion 222. It arrange | positions on the vehicle outer side, that is, it arrange | positions with the front-back position of both the leg parts 322 and 324 of the roll bar 32 differing. Accordingly, the top portion 326 of the roll bar 32 in which both the leg portions 322 and 324 are connected in an inverted U shape is positioned between the vehicle outer leg portion 322 and the vehicle inner leg portion 324. It will be located ahead of the top part 726 of the roll bar 72 according to the structure 70 in the vehicle longitudinal direction.

  Further, since the inner leg portion 324 of the roll bar 32 is bent forward in the vehicle front-rear direction at the height of the shoulder portion 224 of the seat back 22, the top portion 326 of the roll bar 32 is further frontward in the vehicle front-rear direction. Will be located. As a result, the distance between the top portion 326 of the roll bar 32 and the storage locus 82 of the roof member 80 according to the conventional roll bar structure 70 increases, so that the storage locus 52 of the roof member 50 is moved forward in the vehicle longitudinal direction. At the same time, the roof member storage portion R can be moved forward in the vehicle longitudinal direction.

  That is, it is possible to bring only the retracted locus 52 of the roof member 50 to the front side without moving the rearmost position of the seat 20 forward in the vehicle longitudinal direction. Therefore, it is possible to shorten the front-rear dimension of the passenger compartment by the dimension L as shown in FIG.

  Further, in addition to utilizing the enlarged distance between the top 326 of the roll bar 32 and the retracted track 52 of the roof member 50 to bring the top 326 of the roll bar 32 forward, the top 326 of the roll bar 32 is used. It may be used to raise the value. This will be specifically described with reference to FIG. FIG. 11 is a side view of the vehicle showing the occupant protection space S based on the roll bar structure, and shows the top 326 of the roll bar 32 and the occupant protection space boundary 328 that are simply moved forward in the vehicle front-rear direction by a thick line. The top 336 of the roll bar 33 and the occupant protection space boundary line 338 which are raised while being moved forward by a thin line are shown.

  Here, the line connecting the top of the front pillar 16 of the vehicle 1 and the top of the roll bar is defined as an occupant protection space boundary line 328, 338, and the passenger compartment space below the occupant protection space boundary line is protected. Space S is assumed. As shown in FIG. 11, the occupant protection space S can be increased from the occupant protection space boundary 328 to the occupant protection space boundary 338 by an angle α by raising the top 326 of the roll bar 32. Accordingly, occupant protection performance based on the roll bar structure can be improved.

  Next, with reference to FIG. 12, it will be described that the timing of starting the action of the roll bar at the time of vehicle rollover is advanced. FIG. 12 is a front view of a vehicle showing an occupant protection space S based on a roll bar structure. A thick line shows the roll bar structure 30 and the occupant protection space boundary line 329 according to this embodiment, and a thin line shows a conventional roll bar structure. 70 and an occupant protection space boundary 729 based on this roll bar structure.

  As shown in FIG. 12, since both legs of the roll bar are arranged on the vehicle outer side than the headrest part 222 of the seat back 22, the top part 326 of the roll bar 32 in which both legs are connected in an inverted U shape, The seat back 22 is located on the vehicle outer side than the headrest portion 222. For this reason, the top portion 326 of the roll bar 32 is located on the vehicle outer side by a distance indicated by A in FIG. 12 than the top portion 726 of the conventional roll bar structure 70.

  Accordingly, the passenger protection space S can be increased from the passenger protection space boundary line 729 to the passenger protection space boundary line 329 by an angle β. That is, the action of the roll bar can be accelerated when the vehicle rolls over by the angle β formed between the occupant protection space boundary line 729 and the occupant protection space boundary line 329. Accordingly, occupant protection performance based on the roll bar structure can be improved.

  Next, referring to FIG. 13 and FIG. 14, it will be described how to increase the backward tilt amount of the seat back 22. FIG. 13 is a plan view for explaining the backward inclination amount of the seatback of the seat at the rearmost position, and FIG. 14 is a side view for explaining the backward inclination amount of the seatback of the seat at the rearmost position. A thick line shows the roll bar structure 30 according to this embodiment and a state 22a in which the seat back 22 of the sheet 20 at the rearmost position is tilted most backward, and a thin line shows the conventional roll bar structure 70 and the sheet 20 at the rearmost position. The state 22a ′ in which the seat back 22 is most tilted backward is shown.

  As shown in FIGS. 13 and 14, the top portion 726 of the roll bar 72 of the conventional roll bar structure 70 is in a positional relationship facing the headrest portion 222 of the seat back 22. For this reason, in the conventional roll bar structure 70, the seat back 22 can be tilted backward only to the position where the headrest portion 222 of the seat back 22 and the top portion 726 of the roll bar 72 contact with each other at the rearmost position of the seat 20. It cannot be done, and the most backwardly inclined state remains in the state indicated by 22a ′.

  On the other hand, in the roll bar structure 30 according to this embodiment, the top portion 326 of the roll bar 32 is located above the shoulder portion 224 while avoiding the headrest portion 222 of the seat back 22 on the vehicle outer side as described above. Even if the seat back 22 is tilted backward at the rearmost position of the seat, the top portion 326 of the roll bar 32 and the headrest portion 222 of the seat back 22 do not interfere with each other, and the seat back reaches the state shown by 22a in FIG. 22 can be tilted backward.

  In other words, in the roll bar structure 30 according to this embodiment, the backward tilt of the seat back 22 is not limited by the top portion 326 of the roll bar 32, and the conventional roll bar structure 70 by an angle γ as shown in FIG. As a result, the amount of backward tilt of the seat back 22 can be increased. Therefore, since the amount of backward tilt of the seat back 22 can be increased at the rearmost position of the seat 20, it is possible to provide an appropriate driving posture even for a passenger with a larger body shape.

  As shown in FIGS. 3 and 4, in the roll bar structure 30 according to this embodiment, the vehicle outer leg vertical portion 322 a is located on the side of the seat back 22 and extends up and down to the shoulder portion 224. ing. As a result, it is possible to resist the side impact load received by the side panel 14 from the vehicle body at the time of a side collision or the like from being transmitted to the seat 20, so that the side impact load is not directly transmitted to the seat back 22. Accordingly, occupant protection performance based on the roll bar structure can be improved.

  The pair of left and right roll bars 32 are firmly connected to the rear deck 10 by bolts via flanges 40 and 42, respectively, and both the vehicle inner leg portions 324 vertically move the vehicle inner leg portions 324 to the cross bar 34, respectively. And the upper and lower wall portions 342 and 344 of the cross bar 34 are welded and joined to each other, and both the vehicle outer leg portions 322 are joined to the side panel 14 by the lower connecting members 38, respectively.

  Further, the cross bar 34 is coupled to the side panel 14 by a pair of left and right gussets 36. That is, the pair of left and right roll bars 32 are coupled by the cross bar 34 and further coupled to the side panel 14 by using the gusset 36 and the lower connecting member 38.

  Thereby, the force that the roll bar 32 receives from the road surface when the vehicle rolls over is distributed to the side panel 14 and the cross bar 34. Further, the side impact load that the side panel 14 receives from the side of the vehicle body at the time of a side collision or the like is distributed to the pair of left and right roll bars 32 and the cross bar 34 via the gusset 36 and the lower connecting member 38. As a result, the strength of the roll bar structure 30 against the force acting on the roll bar 32 and the side impact load when the vehicle rolls over can be further improved.

  In addition, the roll bar 32 according to this embodiment has an outer leg 322 at one end arranged on the side of the seat back 22, and an inner leg 324 at the other end arranged behind the seat back 22. Yes. That is, both the leg portions 322 and 324 are arranged with their positions shifted in the vehicle width direction and the vehicle front-rear direction, respectively, so that an external force from either the vehicle width direction or the vehicle front-rear direction acts on the roll bar 32. However, an effective support relationship is established between the vehicle outer leg 322 and the vehicle inner leg 324 of the roll bar 32, and the external force from either the vehicle width direction or the vehicle front-rear direction is affected. Even against this, it can always resist effectively.

  This will be specifically described. For example, when an external force in the longitudinal direction of the vehicle body acts on the roll bar 32 when the vehicle rolls over, the vehicle outer leg 322 is arranged so that its cross-sectional shape is an ellipse and the major axis is parallel to the longitudinal direction of the vehicle. Therefore, it is possible to effectively resist the external force in the front-rear direction, and further, since the vehicle inner leg 324 is disposed behind the vehicle outer leg 322, the vehicle outer leg 322 is arranged in the front-rear direction. It is supported with the effective posture by the vehicle inner side leg portion 324 with respect to the load.

  Similarly, when an external force in the vehicle width direction acts on the roll bar 32, the vehicle inner leg 324 is arranged so that its cross-sectional shape is an ellipse and the major axis is parallel to the vehicle width direction. It can effectively resist the external force in the direction. Further, since the vehicle outer side leg 322 is arranged on the vehicle outer side of the vehicle inner side leg 324, the vehicle inner side leg 324 is supported with its effective posture by the vehicle outer side leg 322 with respect to the load in the vehicle width direction. Is done. Therefore, the roll bar 32 can always effectively resist an external force from either the vehicle width direction or the vehicle front-rear direction.

  Further, as shown in FIG. 3, the vehicle outer side leg portion 322 of the roll bar 32 is located on the side of the seat back 22, but is bent inward from the height of the shoulder portion 224 of the seat back 22, A vehicle outer leg inclined portion 322b is formed. Accordingly, the vehicle outer side of the top portion 326 of the roll bar 32 is compared with the case where the vehicle outer side leg 322 on the side of the seat back 22 and the vehicle inner side leg 324 behind the seat back are simply connected in an inverted U shape. Can be reduced.

  As a result, the gap between the side shape of the roof and the roll bar 32 can be expanded, so that the side shape of the roof can be narrowed down to the inside of the vehicle, and the design flexibility of the side shape of the roof can be improved. .

  Further, the vehicle outer side leg portion 322 of the roll bar 32 is coupled to the side panel 14 via the clamp 386 of the lower connecting member 38. As a result, even when the vertical position of the mounting hole (not shown) provided in the side panel with respect to the outer leg 322 of the roll bar is shifted, the clamp part 386 is positioned vertically on the outer leg of the roll bar 32. By moving along the portion 322a, it is possible to absorb the deviation of the assembly position. Therefore, the assembling property of the lower connecting member 38 can be improved.

  Moreover, as shown in FIG. 6, the roll bar structure 30 according to this embodiment employs a roll bar 32 having an elliptical cross section. By making the cross section of the roll bar 32 into an ellipse, the same strength as that of the round pipe is ensured while saving space. Specifically, since the vehicle outer leg portion 322 is disposed so as to be thin in the vehicle width direction, the vehicle outer side leg portion 322 is formed on the side of the seat back 22 without reducing the size of the seat back 22 or the side panel 14 in the vehicle width direction. A vehicle outer side leg 322 of the roll bar 32 can be arranged.

  Further, since the vehicle inner leg portion 324 is disposed so as to be thin in the vehicle front-rear direction, the size of the roof member storage portion in the vehicle front-rear direction can be increased even if it is disposed behind the seat back 22. For this reason, since the roof member storage portion can be further moved forward in the vehicle front-rear direction, the front-rear dimension of the passenger compartment can be reduced while ensuring the amount of seat front-rear movement.

  Referring to FIG. 14, when the seat back 22 is tilted backward in the parking lot, the seated person's face is partially concealed from the vehicle side view by the vehicle outer leg 322 of the roll bar 32. As a result, the glare outside the vehicle and the feeling of being peeped from outside the vehicle can be reduced.

  Next, with reference to FIG. 15, another embodiment of the upper vehicle body structure of an open car will be described. FIG. 15 is a perspective view showing another embodiment of the upper body structure of the open car according to the present invention.

  In the above embodiment, the roll bar 32 employs an elliptical pipe, but as shown in FIG. 15, a space is ensured between the side panel 14 and the seat back 22 (for example, the vehicle width of the seat back). By reducing the directional dimension, a pipe with a round cross section can be employed. Thereby, the roll bar 32 can be formed more easily.

  Furthermore, in the above embodiment, the inner leg portion of the roll bar 32 passes through the cross bar 34 so as to extend vertically, and one end thereof is fixed to the rear deck 10 via the flange 42 with a bolt. As shown in FIG. 15, the cross bar 34 may be fixed at a position slightly protruding from the lower wall portion 344 and not fixed to the rear deck. As a result, a space for storing small items can be provided between the cross bar 34 and the rear deck 10, or the roof member storage portion R can be increased.

  The present invention is not limited to the embodiment described above, and various modifications and changes can be made without departing from the spirit and scope of the present invention described in the claims.

  As described above, according to the upper car body structure of the open car according to the present invention, it is possible to shorten the front-rear dimension of the passenger compartment while securing a desired front-rear movement amount of the seat. Furthermore, the occupant protection space based on the roll bar structure can be increased and the strength of the roll bar can be improved. Therefore, the present invention may be suitably used in the industrial field in which the upper body structure of an open car is manufactured or used.

DESCRIPTION OF SYMBOLS 1 Vehicle 14 Side panel 15 Front pillar 20 Seat 22 Seat back 222 Headrest part 224 Shoulder part 30 Roll bar structure 32 Roll bar 322 Car outer leg part 324 Car inner leg part 326 Top part 328, 329 Passenger protection space boundary line 34 Cross bar 36 Gusset 38 Lower connecting member 50 Roof member 52 Roof member storage locus R Roof member storage portion S Crew protection space

Claims (4)

In the upper car body structure of an open car in which a roof member storage portion is provided on a rear deck behind the seat in the passenger compartment, and the roof member is rotationally stored in the storage portion.
In front of the vehicle front-rear direction of the roof member storage portion,
A vehicle outer leg located on the vehicle outer side of the seat back constituting the seat;
An inverted U-shaped roll bar having left and right vehicle inner side legs positioned on the vehicle outer side than the center in the vehicle width direction of the seat back at the rear of the seat back in the vehicle front-rear direction ;
The upper body structure of an open car, wherein the upper portion of the roll bar is bent forward and inward of the vehicle in the longitudinal direction .   The upper vehicle body structure of an open car according to claim 1, wherein the vehicle inner leg portion is positioned on the vehicle outer side with respect to a headrest provided at an upper center of the seat back. The upper body structure of an open car according to claim 1 or 2, wherein the vehicle outer leg portion and the vehicle inner leg portion extend substantially vertically up to a height of a shoulder portion of the seat back. Bottom of the vehicle exterior side legs of the roll bar, the upper body structure of an open car according via the connecting member to the side wall of the vehicle body are connected, claims 1 to any one of 3 located on the vehicle exterior side .

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