JP2005186688A - Vehicular roll bar structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular roll bar structure capable of effectively dispersing an input load from a roll bar or a side panel between a cross bar and the side panel, and effectively receiving force generated by a hood supporting bracket falling down to the inside of a vehicle at the time of opening/closing of a hood. <P>SOLUTION: The vehicular roll bar structure 40 is equipped with a pair of side panels 12 structuring both side surfaces of a vehicle body; and a link bracket 30 provided on the side panels, and rotatably supporting an opening type roof. The vehicular roll bar structure 40 comprises the roll bar 42 extending upward, the cross bar 46 united to the roll bar and extending in a vehicular width direction, and a coupling portion coupling the roll bar and a link bracket. The cross bar is united to a coupling member together with the roll bar. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a roll bar structure of a vehicle, and in particular, a vehicle including a pair of side panels that constitute both side surfaces of a vehicle body, and a link bracket that is provided on these side panels and rotatably supports an open roof. This relates to the roll bar structure.

2. Description of the Related Art In recent years, a so-called open car having an open roof is provided with a roll bar that extends above the vehicle to protect the head of an occupant when the vehicle falls over.
In such a roll bar, a roll bar unit is known in which a roll bar extending above the vehicle is combined with a reinforcing member extending in the vehicle width direction in order to obtain higher yield strength.
In order to obtain higher strength in such a roll bar unit, it is known to attach the roll bar unit to a hood support bracket fixed to a side panel (see Patent Document 1).

JP-A-11-321334

However, in the conventional vehicle roll bar structure, only the reinforcing member extending in the vehicle width direction, which is a member of the roll bar unit, is connected to the hood support bracket, so that when the vehicle rolls over, the input load to the roll bar is reduced. There was a problem that it was not effectively transmitted to the side body, and a problem that the input load to the side body was not directly transmitted to the roll bar at the time of a side collision.
In addition, since only the roll bar, which is a member of the roll bar unit, is connected to the hood support bracket, the problem that the hood support bracket cannot effectively receive the force of the hood support bracket falling down when the hood is opened and closed. was there.

The present invention has been made to solve the problems of the prior art, and effectively distributes the input load from the roll bar and the side panel between the roll bar, the cross bar and the side panel, and at the time of opening and closing the hood. An object of the present invention is to provide a roll bar structure for a vehicle that can effectively receive the force that the hood support bracket falls into the inside of the vehicle.
Another object of the present invention is to provide a roll bar structure for a vehicle that can improve the yield strength of the roll bar structure by firmly bonding the roll bar, the cross bar, and the side panel.

In order to achieve the above object, the present invention provides a vehicle roll provided with a pair of side panels constituting both side surfaces of a vehicle body and link brackets provided on these side panels to rotatably support an open roof. The bar structure has a roll bar that extends upward, a cross bar that is coupled to the roll bar and extends in the vehicle width direction, and a connecting member that connects the roll bar and the link bracket. It is characterized by being coupled to the connecting member together with the bar.
In the present invention configured as described above, since the connecting member connects the roll bar and the link bracket, and the cross bar is coupled to the connecting member together with the roll bar, the force that the roll bar receives from the road surface when the vehicle rolls over. Is distributed between the side panel and the crossbar. Further, the load that the side panel receives from the side of the vehicle body at the time of a side collision or the like is distributed to the roll bar and the cross bar. As a result, the strength of the roll bar structure against the force applied to the roll bar and the side impact load is improved.
Furthermore, since the force that the link bracket falls inward due to the weight of the hood or the retractable hard top supported by the link bracket is received by the roll bar and the cross bar, the link bracket is prevented from falling inward.

Moreover, in this invention, Preferably, the roll bar and the connection member are couple | bonded by the fastening member which penetrates both of them.
In the present invention configured as described above, since the roll bar and the connecting member are coupled by the fastening member that penetrates both of them, the roll bar and the connecting member directly transmit force to each other. Can improve each other's ability to transmit load.

In the present invention, preferably, the cross bar is coupled to the roll bar and the connecting member by a fastening member that passes through the cross bar, the roll bar, and the connecting member.
In the present invention configured as described above, the cross bar is coupled to the roll bar and the connecting member by a fastening member that passes through the cross bar, the roll bar, and the connecting member. The connecting members can directly transmit force to each other, and the load transmission capabilities of the crossbar, roll bar, and connecting member are improved.

In the present invention, preferably, a plurality of fastening members are provided apart from each other in the vehicle vertical direction.
In the present invention configured as described above, since the plurality of fastening members are provided apart from each other in the vehicle vertical direction, the load transmission capabilities of the cross bar, the roll bar, and the connecting member are improved more reliably. In particular, when the hood or the retractable hard top is opened and closed, the force that the link bracket falls inward due to the weight of the hood and the retractable hard top is reliably distributed to the roll bar and the cross bar.

According to the present invention, the input load from the roll bar and the side panel is effectively distributed between the roll bar, the cross bar and the side panel, and the force that the hood support bracket falls down inward of the vehicle when the hood is opened and closed is effective. I can catch it.
According to the present invention, the roll bar, the cross bar, and the side panel can be firmly coupled to improve the proof stress of the roll bar structure.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a rear portion of a vehicle having a vehicle roll bar structure according to an embodiment of the present invention, and FIG. 2 is a rear view of the vehicle having a vehicle roll bar structure according to an embodiment of the present invention. It is the side view which looked at the part from the left side.

As shown in FIG. 1, a vehicle 1 includes a floor panel 2 that forms a floor of a passenger compartment, a floor tunnel 4 that protrudes upward from the floor panel 2 and extends in the front-rear direction, and the floor panel 2 and the floor tunnel 4. A kick-up panel 6 extending obliquely upward and rearward at the rear end of the rear, a rear floor panel 8 extending from the upper end of the kick-up panel 6 to the rear of the vehicle and constituting a floor of the cargo compartment, and a rear floor panel 8 A rear panel 10 extending in the vertical direction at the end and a pair of side panels 12 extending in the vertical direction that constitute both side surfaces of the vehicle are provided.
The vehicle 1 further includes a pair of side sills 14 extending in the longitudinal direction of the vehicle body on the left and right ends of the floor panel 2 as a vehicle body reinforcement frame, a backbone frame 16 formed in the floor tunnel 4 and extending in the longitudinal direction, and the backbone frame 16 And a cross member 18 having a rectangular closed cross-sectional structure extending in the vehicle width direction and connected between the left and right side panels 12.

The floor panel 2 is formed with a front seat bracket 20 and a rear seat bracket 22 that extend in the vehicle width direction on both the left and right sides of the floor tunnel 4, and the seat brackets 20 and 22 have a seat 24 (only the left seat is shown). ) Is attached.
Link brackets 30 are fixed to the pair of side panels 12 to rotatably support a hood 28 or a retractable hard top (not shown) that is an open roof.

  As shown in FIG. 2, a main link 32 for opening and closing the hood 28 and a sub link 34 are rotatably attached to the link bracket 30. In FIG. 2, the hood 28 and each link 32, 34 is stored in the hood storage unit 36. A fuel tank 38 is provided below the hood storage portion 36 and behind the kick-up panel 6 and the cross member 18. As described above, in order to secure a space for arranging the hood storage portion 36 and the fuel tank 38, the cross member 18 has a rectangular closed cross-sectional structure in which the width in the front-rear direction is reduced and the closed cross-sectional area is relatively small. Yes.

  As shown in FIGS. 1 and 2, the vehicle body 1 further includes a roll bar device 40 behind the seat 24. The roll bar device 40 includes a pair of roll bars 42 extending in the vehicle vertical direction, a cross bar 44 extending in the vehicle width direction between the pair of side panels 12, the roll bars 42, the cross bar 44, and the link bracket 30. An upper connecting member 46 that connects the roll bar 42 and the side panel 12, and a belt anchor attachment member 50 that is fixed so as to straddle the roll bar 42 and the cross bar 44. Yes.

Next, the structure of the roll bar device 40 will be described more specifically with reference to FIGS. FIG. 3 is an enlarged perspective view of a main part showing a roll bar and a cross bar of a roll bar structure according to an embodiment of the present invention, and FIG. 4 shows a roll bar and a cross bar of the roll bar structure according to an embodiment of the present invention. It is a principal part enlarged front view.
First, as shown in FIGS. 1 and 2, the roll bar 42 is formed by forming a single round pipe into a U shape, and is arranged so as to extend in an up-down direction in an inverted U shape. Protrudes upward from the cross bar 44. The roll bar 42 includes an upper portion 42a that is largely bent in a U-shape, a roll bar outer side portion 42b that extends in the vertical direction on the left and right sides of the upper portion, and an inner side in the vehicle width direction. And an inner portion 42c of the roll bar.

As shown in FIGS. 1 to 4, each of the roll bar outer portions 42 b penetrates the cross bar 44, extends obliquely downward toward the front of the vehicle below the cross bar 44, and its lower end is substantially triangular. It is fixed to the cross member 18 with three bolts 54 through the flange 52. Further, as shown in FIGS. 3 and 4, the roll bar inner portion 42 c penetrates the cross bar 44 so that the lower end portion thereof does not protrude greatly from the lower wall portion of the cross bar 44.
In this way, the cross bar 44 is provided so that the roll bar outer portion 42 b extends obliquely downward toward the front of the vehicle below the cross bar 44 and the roll bar inner portion 42 c does not protrude greatly below the cross bar 44. Thus, the space for the cargo compartment and the hood storage portion 36 is secured.

Next, the configuration of the crossbar having the roll bar structure will be specifically described with reference to FIGS. 3, 5, and 6. 5 is a cross-sectional view taken along line VV of FIG. 3, and FIG. 6 is an exploded perspective view showing two members constituting the cross bar of the roll bar structure according to the embodiment of the present invention in an exploded manner. Yes, looking from the same direction as in FIG.
First, as shown in FIGS. 3, 5, and 6, the crossbar 44 includes a front crossbar member 56 disposed on the vehicle body front side and a rear crossbar member 58 disposed on the vehicle body rear side. The rectangular closed section is formed by these members.

  The front crossbar member 56 is formed in a U shape and has an upper wall portion 56a, a lower wall portion 56b, and a vertical wall portion 56c therebetween. At both ends in the vehicle width direction of the front crossbar member 56, a pair of recesses 66 are formed in the upper wall portion 56a and the lower wall portion 56b, respectively, and the recess portions 66 are formed in the vertical wall portion 56c. Two bolt through holes 68 are formed at the same position in the vehicle width direction.

In addition, a pair of hole portions 70 are formed on the upper wall portion 56a and the lower wall portion 56b of the front side crossbar member 56 on the inner side in the vehicle width direction from the recess portion 66, and these hole portions 70 are formed in the inner portion of the roll bar. 42c penetrates in the up-down direction.
Further, the upper wall portion 56a and the lower wall portion 56b of the front crossbar member 56 each have a flange portion 72 at the rear end portion, and these flange portions 72 are surfaces on which the hole portion 70 and the recess portion 66 are formed. On the other hand, the upper wall portion 56a has a step so that it is one step higher and the lower wall portion 56b is one step lower.

  Next, as shown in FIGS. 3, 5 and 6, the rear crossbar member 58 has an upper wall portion 58a, a lower wall portion 58b, and a vertical wall portion 58c therebetween. The upper wall portion 58a and the lower wall portion 58b of the rear crossbar member 58 are respectively provided with a roll bar support portion 80 extending forward at both ends in the vehicle width direction, and inward in the vehicle width direction from the roll bar support portion 80. And a flange portion 82 extending rearward. The roll bar support portion 80 and the flange portion 82 are formed so as to be separated in the vehicle width direction via a notch portion 88 described later.

A pair of recesses 84 facing the front crossbar member 56 is formed in the roll bar support portion 80 of the rear crossbar member 58.
As shown in FIG. 3, these recesses 84 form an opening 86 together with the pair of recesses 66 of the front crossbar member 56 so that the roll bar outer portion 42b extends in the vertical direction. It is arranged. As shown in FIGS. 3 and 5, the flange portion 82 of the rear crossbar member 58 is formed so as to overlap the flange portion 72 of the front crossbar member 56.

Further, as shown in FIG. 6, between the roll bar support portion 80 and the flange portion 82 of the vertical wall portion 58 c of the rear side crossbar member 58, the cut portions are cut into R shapes facing upward or downward, respectively. A notch 88 is formed.
These cutout portions 88 are formed at positions shifted from each other in the vehicle width direction, and the roll bar support portion 80 of the upper wall portion 58a corresponds to the vehicle width direction position of the cutout portions 88. 58b is shorter in the vehicle width direction than the roll bar support portion 80, and the flange portion 82 of the upper wall portion 58a is formed longer in the vehicle width direction than the flange portion 82 of the lower wall portion 58b. In addition, two beads 90 are formed in a region in the vicinity of the cutout portion 88 facing upward and downward of the vertical wall portion 58c so as to extend in the vehicle width direction sufficiently longer than the width of the cutout portion 88. Yes.
Further, at both ends in the vehicle width direction of the vertical wall portion 58c, two bolt through holes 92 are formed vertically at the same position in the vehicle width direction as the concave portions 84 of the upper wall portion 58a and the lower wall portion 58b.

Next, a method of assembling the front crossbar member 56 and the rear crossbar member 58 and the roll bar 42 will be described with reference to FIG. FIG. 7 is a perspective view showing an outline of a method of assembling each cross bar member and roll bar of the roll bar structure according to the embodiment of the present invention.
As shown in FIG. 7, first, as shown by an arrow A, the roll bar inner portion 42 c is inserted through the hole portion 70 of the front crossbar member 56 from above and penetrated. At that time, the roll bar outer portion 42 b is set to a position facing the concave portion 66 of the front crossbar member 56.

  Next, as indicated by the arrow B, the roll bar 42 is rotated around the roll bar inner part 42 c penetrating the hole 70, and the roll bar outer part 42 b is moved to the front crossbar member 56. It abuts on the recess 66. At this time, the position of the end portion of the spacer member 94 provided on the roll bar outer portion 42b described later matches the position of the bolt through hole 68 of the vertical wall portion 56c of the front crossbar member 56 in the vertical direction. Adjust the position.

  Next, as shown by an arrow C, the rear crossbar member 58 is assembled at a position facing the opening 56d of the front crossbar member 56, and as shown in FIGS. 56 and 58 so that the flange portions 72 and 82 overlap with each other, and the roll bar outer portion 42b is disposed in the opening 86 formed by the recesses 66 and 84 of the two crossbar members 56 and 58, respectively. To do. At this time, as shown in FIG. 5, the rear crossbar member 58 is positioned in the front-rear direction by the stepped portion 72 a of the flange portion 72 of the front crossbar member 56.

Next, referring to FIGS. 3 and 5, a coupling structure between the front crossbar member 56 and the rear crossbar member 58 will be described.
As shown in FIGS. 3 and 5, the front crossbar member 56 and the rear crossbar member 58 assembled to each other are the flange portions 72, 82 and the front crossbar member 56. In FIG. 3, both end portions of the wall portion 56 a and the lower wall portion 56 b and both end portions (roll bar support portions 80) of the upper wall portion 58 a and the lower wall portion 56 b of the rear crossbar member 58 are shown in FIG. As shown in FIG. 2, spot welding is performed at a plurality of locations and coupled to each other.

Next, a coupling structure of the cross bar 44 and the roll bar 42 will be described with reference to FIGS. 4 and 8 to 10. FIG. 8 is an enlarged perspective view of a main part showing a connection part between a roll bar and a cross bar and a side panel of the roll bar structure according to the embodiment of the present invention, and FIG. 9 is taken along line IX-IX in FIG. FIG. 10 is a sectional view taken along line XX in FIG. 8.
First, as shown in FIG. 4, the inner part 42 c of the roll bar and the upper wall part 56 a and the lower wall part 56 b of the front crossbar member 56 are indicated by E in FIG. 4 along the outer peripheral edge of the hole part 70. As shown, the outer side portion 42b of the roll bar and the upper wall portions 56a, 58a and the lower wall portions 56b, 58b of the front and rear crossbar members are respectively crossbar members 56, 58. As shown by F in FIG. 4, the roll bar 42 and the cross bar 44 are joined to each other along the outer peripheral edge of the opening 86 formed by the recesses 66 and 84.

  Further, as shown in FIGS. 8 to 10, the roll bar outer portion 42 b and the cross bar 44 are joined by fastening members 96 and 98. First, as shown in FIGS. 9 and 10, two hollow cylindrical spacer members 94 that are spaced apart in the vertical direction and extend in the front-rear direction are provided on the roll bar outer portion 42b of the roll bar 42 in front of the roll bar 42b. It is press-fitted into a hole provided in the rear part and the rear part and is fixed by welding (see FIG. 7). These spacer members 94 extend in the front-rear direction within the closed cross section of the cross bar 44, and both ends thereof are the front wall portion of the cross bar 44 (the vertical wall portion 56 c of the front crossbar member) and the cross bar 44. It is in contact with the rear wall portion (the vertical wall portion 58c of the rear crossbar member).

  Further, these spacer members 94 are fastened to the cross bar 44 by fastening members, that is, bolts 96 and nuts 98, respectively. Specifically, the bolts 96 are, in order from the vehicle body front side, one end portion 46a of an upper connecting member 46 described later, a fixing portion 112a of a belt anchor mounting member 50 described later, a vertical wall portion 56c of a front crossbar member, The spacer member 94, the vertical wall portion 58c of the rear crossbar member, and one end portion of the link bracket 30 are respectively penetrated and fastened by a nut 98.

Next, the connection structure of the roll bar and cross bar and the link bracket will be described with reference to FIGS.
First, as shown in FIGS. 8 and 10, the link bracket 30 includes three members 30 a, 30 b, and 30 c that are welded to each other, that is, a member 30 a that is fixed to the inner side surface of the side panel 12 by welding. The member 30b is provided on the vehicle rear side and extends to the roll bar outer portion 42b, and the member 30c is provided on the vehicle front side. Further, two shaft members (only a sub-link shaft member 30d is shown) for rotatably supporting the main link 32 and the sub-link 34 (see FIG. 2) are attached to these members 30a, 30b, and 30c. It has been.
The link bracket 30 is connected to the roll bar 42 and the cross bar 44 via an upper connecting member 46 on the front side of the vehicle, and the member 30b is directly fastened by fastening members 96 and 98 on the rear side of the vehicle. .

  The upper connecting member 46 is a flat plate bent in a dogleg shape, and one end 46 a thereof is coupled to the roll bar 42 and the cross bar 44, and the other end 46 b is coupled to the link bracket 30. A bead 46c is formed in the upper connecting member 46 in the vehicle width direction, and its rigidity is enhanced. One end 46a of the upper connecting member is fastened to the roll bar 42 and the cross bar 44 by the fastening members 96 and 98 described above. The other end 46b of the upper connecting member is fastened to the member 30c of the link bracket by a bolt 100 and a nut 102 (see FIG. 8).

Next, the belt anchor attachment member 50 will be described with reference to FIGS. FIG. 11 is an enlarged perspective view of a main part of a belt anchor mounting member and a belt anchor having a roll bar structure according to an embodiment of the present invention, and FIG. 12 shows a belt anchor mounting member having a roll bar structure according to an embodiment of the present invention. It is a principal part expansion perspective view shown.
First, as shown in FIG. 8, the roll bar 42 and the cross bar 44 are provided with a belt anchor attaching member 50, and the belt anchor attaching member 50 supports the seat belt 104 as shown in FIG. A belt anchor 106 is fixed.

  Next, as shown in FIG. 12, the belt anchor attaching member 50 is formed by bending a single steel plate, and includes an upper surface portion 110 to which the belt anchor 106 is attached, and a front side from the upper surface portion 110. A front surface portion 112 that is bent downward and extends downward, a rear surface portion 114 that is bent backward from the upper surface portion 110 and extends downward, and is bent laterally from each of the upper surface portion 110, the front surface portion 112, and the rear surface portion 114. It has the 1st thru | or 3rd side part 116a, 116b, 116c which overlaps. The first to third side surface portions 116a, 116b, and 116c are welded to each other, and the rigidity of the belt anchor attachment member 50 is increased. An attachment hole 118 for attaching the belt anchor 106 is formed in the upper surface portion 110.

The belt anchor attachment member 50 has a lower fixing portion 112a (first fixing portion) formed in a lower portion of the front surface portion 112 so as to extend in parallel with the front wall portion 56c of the cross bar 44. A bolt through hole 120 is formed in the lower fixing portion 112a at a position corresponding to the bolt through hole 68 of the front crossbar member 56 described above.
Next, as shown in FIGS. 8 to 10, the lower fixing portion 112 a of the belt anchor attaching member 50 is sandwiched between one end portion 46 a of the upper connecting member 46 and the vertical wall portion 56 c of the front crossbar member 56. As described above, the roll bar 42 and the cross bar 44 are coupled to each other by the fastening members 96 and 98, and the belt anchor mounting member 50 is also coupled to the roll bar 42 and the cross by the lower fixing portion 112a. Coupled to bar 44.

  As shown in FIG. 12, the belt anchor attachment member 50 has a first upper fixing portion 112 b (second fixing portion) formed on the upper portion of the front surface portion 112 so as to extend along the front side surface of the roll bar 42 b. Further, the upper surface portion 110 has a second upper fixing portion 110a (second fixing portion) extending along the outer shape of the roll bar 40 in the circumferential direction. These first and second upper fixing portions 112 b and 110 a are welded to the roll bar 42.

  Next, a connection structure between the roll bar 42 and the side panel 12 by the lower connection member 48 will be described with reference to FIGS. FIG. 13 is an enlarged perspective view of a main part showing a connecting portion between a roll bar and a side panel of the roll bar structure according to the embodiment of the present invention, and FIG. 14 shows a roll bar of the roll bar structure according to the embodiment of the present invention. It is a principal part expansion perspective view which shows the connection member with a downward connection member, FIG. 15: is sectional drawing seen along the XV-XV line | wire of FIG.

First, as shown in FIG. 13, the lower connecting member 48 extends in the vehicle width direction between the roll bar 42 and the side panel 12 below the upper connecting member 46, and connects the roll bar 42 and the side panel 12. doing.
The lower connecting member 48 is formed of a single round pipe, and both end portions 48a and 48b are pressed to form a flat surface. The planar one end 48a of the lower connecting member 48 is coupled to the roll bar 42 via a connecting member 120 fixed to the roll bar 42 as will be described later, and the planar other end 48b is connected to the side panel 12. It is bent to extend in parallel and is connected to the side panel 12 by bolts 122 extending in the vehicle width direction.

  Next, as shown in FIGS. 14 and 15, a substantially circular hole 128 is formed on the front side of the roll bar outer part 42 b and is connected so as to straddle the hole 128 in the vicinity of the hole 128. A member 120 is attached. The connection member 120 is formed in a U-shape, and is attached to the attachment portion 124 to which the one end portion 48a of the lower connection member 48 is attached, and from both the left and right sides of the attachment portion 124 in the vertical direction toward the roll bar 42. And four flange portions 126 that extend so that a part of the roll bar 42 straddles the front side by the mounting portion 124 and the flange portion 126. The four flange portions 126 extend substantially perpendicularly to the axis of the roll bar portion over which the connecting member 120 is straddled, and the tip portions 126a thereof are formed so as to follow the circumferential outline of the roll bar 42b. These leading end portions 126 a are welded to the roll bar 42 b, and the connecting member 120 is fixed to the roll bar 42.

  Next, as shown in FIGS. 14 and 15, the attachment portion 124 of the connection member 120 is formed in a planar shape, and the attachment portion 124 extends in parallel with the axis of the roll bar portion that the connection member 120 straddles. In addition, it extends in the vehicle width direction. The mounting portion 124 is formed with a hole portion 130 substantially at the center thereof corresponding to the hole portion 128 of the roll bar described above, and a nut 134 is welded to the back side of the hole portion 130 (weld nut). Part of 134 is received in the hole 128 of the roll bar.

  Next, as shown in FIG. 15, one end portion 48 a formed in a planar shape of the lower connecting member 48 is overlapped with the attachment portion 124 of the connecting member 120, and the one end portion 48 a of the overlapped lower connecting member is overlapped. The hole 140 is formed at a position corresponding to the hole 130 and the weld nut 134 of the connecting member. The hole 140 extends in the vehicle width direction so that a gap is formed in the vehicle width direction with respect to the shaft 132a of the bolt 132. A bolt 132 extending in the front-rear direction passes through the hole 140 formed in the one end 48 a of the lower connecting member and the hole 130 of the connection member 120, and a weld nut fixed to the bolt 132 and the connection member 120. 134, the lower connecting member 48, the connecting member 120, and the roll bar 42 are fastened together.

  In the present embodiment, the front crossbar member 56 may be disposed on the rear side, and the rear crossbar member 58 may be disposed on the front side. Further, the roll bar inner portion 42c of the roll bar may be formed so as to extend to the cross member 18 below, and the lower end portion thereof may be fixed to the cross member 18. Further, the lower end of the roll bar outer portion 42 b may not protrude so much below the cross bar 44. Further, the lower end portion of the roll bar 42 may be formed to extend to the floor panel 2 and fixed to the floor panel 2 or a vehicle body reinforcing member in the vicinity thereof.

Further, the connecting member 120 between the lower connecting member 48 and the roll bar 42 is disposed on the rear side of the roll bar, and a hole for receiving the weld nut 134 of the connecting member 120 is provided on the rear side of the roll bar, as described above. Further, the roll bar 42 and the side panel 12 may be connected to each other.
Furthermore, as shown in FIG. 16, a lower connecting member 148 formed in a plate shape may be provided. Here, the side panel 12 is provided with temporary placement bolts 142 for temporarily placing the link bracket 30 and positioning the link bracket 30 at the time of manufacture of the vehicle, and the other end portion 148b of the lower connecting member is temporarily placed. You may make it fix to the side panel 12 with the nut 144 using the volt | bolt 142. FIG.

Next, the operation of this embodiment will be described.
First, the roll bar inner portion 42c penetrates the cross bar 44 in the vertical direction through the hole portions 70 formed in the upper wall portion 56a and the lower wall portion 56b of the cross bar 44, and the outside of the hole portion 70 penetrating therethrough. The upper wall portion 56a and the lower wall portion 56b of the cross bar are joined by welding along the peripheral edge. Therefore, when the vehicle rollover, the upper portion 42a of the roll bar receives the vehicle longitudinal direction force from the road surface, such bending force as shown by an arrow F _M in FIG. 11 is applied to the roll bar, the roll bar 42 and cross This bending force Even if a force that separates the roll bar 42 and the cross bar 44 from each other is applied to the joint portion with the bar 56, such a force is applied to both the upper wall portion 56a and the lower wall portion 56b that are separated in the vertical direction. I can catch it.

  In particular, the hole 70 through which the roll bar passes is formed only in one member constituting the cross bar 44, that is, the front cross bar member 56, and the bending force applied to the roll bar 42 is received by a single member. As a result, the proof stress of the roll bar structure 40 is improved. Further, since it is not necessary to provide a separate member for fixing the roll bar 42 to the cross bar 44, the number of parts can be reduced.

Further, the roll bar outer portion 42b is disposed in the upper and lower openings 86 of the cross bar 44 formed by the concave portions 66 and 84 facing each other of the cross bar members 56 and 58 so that the cross bar 44 is moved in the vertical direction. Therefore, even when the cross bar 44 is composed of the two members 56 and 58, the above-described bending force applied to the roll bar 42 causes the upper wall portion 56a, which is spaced apart in the vertical direction of the cross bar 44, It is received by both 58a and lower wall part 56b, 58b.
Further, since the roll bar outer portion 42b is disposed in the concave portions 66 and 84 facing each other of the cross bar members 56 and 58, the roll bar 42 has a portion bent downward. However, the roll bar 42 and the cross bar 44 can be firmly bonded to each other.

Further, since the other crossbar member 58 is assembled after the roll bar outer portion 42b is disposed in the recess 66 of the one crossbar member 56, the roll bar 42 may have a bent portion below it. The cross bar 44 can be penetrated in the vertical direction.
Thus, since the cross bar 44 is divided into the front cross bar member 56 and the rear cross bar member 58 and the roll bar 42 is assembled as described above, the roll bar outer portion 42b faces the front of the vehicle. Even when bent so as to extend obliquely downward, the roll bar 42 and the cross bar 44 can be easily assembled.

  Next, the spacer member 94 fixed to the roll bar 42 extends in the front-rear direction in the closed cross section of the cross bar 44 so that both end portions thereof are in contact with the front wall portion 56c and the vertical wall portion 58c of the cross bar. Therefore, the roll bar 42 and the cross bar 44 are reliably positioned in the front-rear direction. Further, since the bending force applied to the roll bar 42 described above is received by the spacer member 94 in addition to the upper portions 56a and 58a and the lower portions 56b and 58b of the crossbar, the roll bar structure against the force received by the roll bar 42 from the road surface. The yield strength of 40 is further improved.

Further, the roll bar 42 and the spacer member 94 and the cross bar 44 are fastened together by the fastening members 96 and 98 penetrating the spacer member 94 made of a cylindrical member and the front wall portion 56c and the rear wall portion 58c of the cross bar. Therefore, the roll bar 42 and the cross bar 44 are more reliably coupled. Even if welding (E, F in FIG. 4) of the fastening members 96, 98 and the upper and lower roll bars 42 of the cross bar 44 is loosened by some force, both ends of the spacer member 94 are crossed. Since the front wall portion 56c and the vertical wall portion 58c of the bar are in contact with each other, the force received by the roll bar 42 from the road surface is received by the cross bar 44, and the strength of the roll bar structure 40 can be effectively ensured. .
Further, since a plurality of spacer members 94 are provided apart in the vertical direction, the proof stress of the roll bar structure 40 against the bending force described above is further improved.

Next, the rear crossbar member 58 is provided facing the opening portion 56d of the front crossbar member 56 that is opened in a U shape, and the flange portions 72 of the crossbar members 56 and 58 that are overlapped with each other. , 82 are formed so as to extend toward the rear of the vehicle. Therefore, when the overlapped flange portions 72, 82 are welded from above and below, welding is performed by inserting a welding jig from the rear side. Is easily performed and mass productivity is improved.
Further, both end portions of the upper wall portions 56a and 58a and the lower wall portions 56b and 58b of each crossbar member can be welded by inserting a spot welding jig from the side surface of the crossbar 44 in the vehicle width direction. .

In addition, since the flange portions 72 and 82 of the crossbar members 56 and 58 both extend toward the rear of the vehicle and the flange portions 72 and 82 are welded to each other, as shown in FIG. Even if the shear force F _S is applied to the cross bar 44 due to the bending force F _M applied to the bar 42, the welding surface is in the same plane as the upper and lower surfaces of the cross bar 44 to which such a shear force is applied. The crossbar members 56 and 58 are firmly bonded to each other against such a shearing force F _S. As a result, the strength of the cross bar 44 against the bending force in the vehicle longitudinal direction applied to the roll bar 42 is increased. Furthermore, by increasing the strength of the crossbar 44, the crossbar 44 and the roll bar outer portion 42b disposed in the recesses 66 and 84 facing each other of the crossbar members 56 and 58 are more firmly coupled. The yield strength of the roll bar structure 40 is increased.

Next, since the roll bar support portion 80 and the flange portion 82 of the rear crossbar member 58 are formed to be separated from each other in the vehicle width direction, the roll bar support portion 80 and the flange portion 82 are connected to the vertical wall portion 58c. On the other hand, interference between molds for bending in opposite directions is prevented.
Further, since the vertical wall portion 58c of the rear side crossbar member 58 is formed with a notch portion 88 facing upward or downward at a portion between the roll bar support portion 80 and the flange portion 82, respectively. A so-called crease in which the portion of the vertical wall portion 58c between the roll bar support portion 80 and the flange portion 82 is deformed by being pulled along with the bending process of the roll bar support portion 80 or the bending process of the flange portion 82 is formed. Is prevented.

Here, there is a concern that stress concentration may occur in the cutout portion 88 due to its shape. However, by forming this cutout portion in an R shape, stress concentration is prevented from occurring as much as possible. ing. Further, the notches 88 facing upward and downward are formed at positions shifted from each other in the vehicle width direction so as not to line up in the vertical direction, so that a decrease in strength due to stress concentration can be suppressed to a small level.
Further, a bead 90 extending in the vehicle width direction that is sufficiently longer than the width of the notch 88 is formed in the vertical wall portion 58c of the rear crossbar member in a region in the vicinity of the notch 88 facing upward and downward. Since it is formed, strength reduction due to stress concentration due to the notch 88 is effectively compensated.

Next, the cross bar 44 is coupled to the upper connecting member 46 together with the roll bar 42, and the upper connecting member 46 is connected to the link bracket 30 fixed to the side panel 12, so that the roll bar is turned over when the vehicle rolls over. The force that 42 receives from the road surface is distributed to the side panel 12 and the cross bar 44.
Further, a load (side impact load) that the side panel 12 receives from the side of the vehicle body at the time of a side collision or the like is distributed to the roll bar 42 and the cross bar 44. As a result, the strength of the roll bar structure 40 against the force applied to the roll bar 42 and the side impact load is further improved.
Further, the force that the link bracket 30 falls inward due to the weight of the hood 28 and the retractable hard top supported by the link bracket 30 is received by the roll bar 42 and the cross bar 44. Falling is prevented.

  In particular, since the roll bar 42 and the upper connecting member 46 are coupled by the fastening members 96 and 98 that pass through them, the roll bar 42 and the upper connecting member 46 directly transmit force to each other, and each other. This improves the load transmission capacity. Similarly, since the cross bar 44 is coupled to the roll bar 42 and the upper connecting member 46 by the fastening members 96 and 98 passing therethrough, they transmit forces directly to each other. The load transmission capabilities of the roll bar 42 and the upper connecting member 46 are improved.

  Further, since a plurality of fastening members 96, 98 for fastening the roll bar 42, the cross bar 44 and the upper connecting member 46 are provided apart from each other in the vertical direction, the cross bar 44, the roll bar 42 and the upper connecting member 46 are provided. Mutual load transmission ability is improved more reliably. In particular, when the hood or the retractable hard top is opened and closed, the force by which the link bracket 30 falls inward due to the weight of the hood and the retractable hard top is reliably distributed to the roll bar 42 and the cross bar 44.

Next, the upper connecting member 46 connects the roll bar 42 and the cross bar 44 to the link bracket 30 fixed to the side panel 12, and the lower connecting member 48 connects the roll bar 42 and the side panel 12. Therefore, the side impact load on the side panel 12 is dispersed through these two connecting members 46 and 48 and transmitted to the roll bar 42 and the cross bar 44.
Further, since the lower connecting member 48 is provided below the upper connecting member 46 and above the cross member 18 that is a vehicle body reinforcing frame, the cross member is added to the side panel 12 above the cross member 18. The side impact load that cannot be received by 18 is received by the roll bar 42 via the lower connecting member 48, and the load applied to the roll bar 42 is also received by the cross bar 44. As a result, the occupant's head, shoulders, and the like are more reliably protected during a side collision of another vehicle.

  Further, the upper connecting member 46 and the lower connecting member 48 are provided on the left and right side panels 12 in the vehicle width direction, and the crossbar 44 is provided so as to connect the upper connecting members 46 on the left and right sides in the vehicle width direction. Therefore, the side impact load applied to the upper connecting member 46 and the lower connecting member 48 is transmitted to the roll bar 42 on the opposite side in the vehicle width direction via the cross bar 44, and the upper connecting member 46 and the lower connecting member 48 are To the opposite side panel 12. As a result, the input loads are distributed between the left and right sides in the vehicle width direction of the vehicle, and the proof stress of the roll bar structure 40 against the side impact load is further improved. Further, the vehicle body rigidity is improved.

  In particular, the cross member 18 which is a vehicle body reinforcing member has a relatively small closed cross-sectional area in which the width in the front-rear direction is narrowed in order to secure a space for arranging the hood storage portion 36 and the fuel tank 38. Since the side impact load is distributed and transmitted to the roll bar 42 and the cross bar 44 via the upper connecting member 46 and the lower connecting member 48, the occupant is more reliably protected.

  Further, since the lower end portion of the roll bar outer portion 42 b of the roll bar 42 is coupled to the cross member 18, the side impact load applied to the cross member 18 is distributed to the roll bar 42 and also applied to the roll bar 42. The applied force is distributed to the cross member 44. As a result, the proof stress of the roll bar structure 40 against the side impact load is further improved.

  Further, since the temporary placing bolt 142 for temporarily placing the link bracket 30 is provided on the side panel 12, the lower connecting member 48 (148) is fixed to the side panel 12 using the temporary placing bolt 142. I can do it. As a result, it is not necessary to separately provide a member for fixing the lower connecting member 48 (148) to the side panel 12, and the number of parts can be reduced.

  Next, at one end 48a of the lower connecting member, a hole 140 is formed in such a size that a gap can be formed in the vehicle width direction with respect to the bolt 132, and the bolt 132 passes through the hole 140 in the front-rear direction. Since the lower connecting member 48 and the connecting member 120 fixed to the roll bar 42 are fastened, the side panel is caused by an attachment error when the roll bar 42 is assembled to the cross member 18 at the lower part of the vehicle body. Even if an error occurs in the relative distance between the roll bar 42 and the roll bar 42 in the vehicle width direction, the side panel 12 and the roll bar 42 are moved while absorbing such an assembly error in the vehicle width direction of the roll bar 42. A lower connecting member 48 extending in the vehicle width direction to be connected can be provided.

  In particular, when the lower connecting member 48 is fixed to the side panel 12 in terms of the structure by using bolts 122 extending in the vehicle width direction, the assembly error of the roll bar 42 to the vehicle body can be reduced with the side of the lower connecting member 48. Even when it cannot be absorbed by the fixing portion with the panel 12, the lower connecting member can be reliably provided while absorbing the assembly error of the roll bar 42 to the vehicle body.

In addition, since a part of the nut 134 of the connecting member 120 is positioned radially inward of the hole 128 of the roll bar, when a side collision load is applied to the lower connecting member 48, The hole 128 and the nut 134 come into contact with each other, and the side impact load is reliably transmitted to the roll bar 42 via the lower connecting member 48. Further, since the lower connecting member 48 has a closed cross section, its rigidity is increased, and the side impact load is reliably transmitted to the roll bar 42.
Furthermore, since the connecting member 120 is fixed to the roll bar 42 so as to straddle a part of the roll bar provided with the hole 128, the connecting member 120 in the axial direction of the roll bar 42 by the hole 128 formed in the roll bar 42. Strength reduction is compensated.

  Here, since the flange portion 126 of the connecting member 120 extends substantially perpendicularly to the axis of the roll bar 42b and only the front end portion 126a of the flange portion 126 is fixed to the roll bar 42b, the connecting member 120 is a lower connecting member. It is fixed to the roll bar 42 relatively weakly in strength against the side impact load transmitted from 48. Therefore, when a relatively large side collision load is applied, the connection member 120 and the roll bar 42 are unfixed, and the nut 134 fixed to the connection member 120 is surely in contact with the hole 128 of the roll bar. Therefore, the side impact load transmitted from the lower connecting member 48 is reliably transmitted to the roll bar 42.

Next, since the belt anchor attachment member 50 is attached so as to straddle the roll bar 42 and the cross bar 44 connected to the side panel 12, the belt anchor attachment member 50 and the belt anchor attachment member 50 are provided. The belt anchor 106 is less likely to be displaced forward with respect to the roll bar 42 and the cross bar 44. Further, since the roll bar 42 and crossbar 44 are connected to the side panel 12, also a force to pull the belt anchor 106 as indicated by arrow F _F in Figure 11 to the front is applied from the seat belt 104, such A large force is received by the side panel 12, the roll bar 42, and the cross bar 44, and the belt anchor 106 can be prevented from being displaced forward.

Further, since the lower fixing portion 112a of the belt anchor mounting member 50 is fixed to the front portion 56c of the crossbar, and the upper fixing portions 112b and 110a of the belt anchor mounting member 50 are fixed to the roll bar 42b above the vehicle, during rollover, be applied to the arrow F _M at showing such bending force roll bar of FIG. 11, the upper fixing portion 112b, a bending force of the roll bar applied to 110a is a cross bar 44 which lower fixing portion 112a is fixed It is accepted. In particular, since the lower fixing portion 112a is fixed to the front portion 56c of the cross bar, when the roll bar 42 is bent forward, the belt anchor mounting member 50 supports the roll bar 42 so as to stretch, and the roll bar 42 When the belt 42 is bent backward, the belt anchor mounting member 50 supports the roll bar 42 so as to pull back. As a result, the yield strength of the roll bar 42 against the bending force in the front-rear direction is improved.

In particular, since the lower fixing portion 112a of the belt anchor attachment member 50 is also fixed to the roll bar 42 together with the cross bar 44, the bending force applied to the roll bar 42 is a position separated vertically by the belt anchor attachment member 50. And the yield strength of the roll bar 42 against the bending force in the front-rear direction is further improved.
Further, since the lower fixing portion 112a of the belt anchor attaching member 50 is sandwiched between the upper connecting member 46 and the cross bar 44 on the front side of the roll bar 42, it is also fixed to the upper connecting member 46. The yield strength against the bending force in the front-rear direction is further improved.

It is a perspective view which shows the rear part of the vehicle provided with the roll bar structure of the vehicle by embodiment of this invention. It is the side view which looked at the back part of vehicles provided with the roll bar structure of vehicles by the embodiment of the present invention from the left side. It is a principal part expansion perspective view which shows the roll bar and cross bar of the roll bar structure by embodiment of this invention. It is a principal part enlarged front view which shows the roll bar and cross bar of the roll bar structure by embodiment of this invention. It is sectional drawing seen along the VV line of FIG. It is a disassembled perspective view which decomposes | disassembles and shows two members which comprise the cross bar of the roll bar structure by embodiment of this invention. It is a perspective view which shows the outline | summary of the assembling method of each crossbar member and roll bar of the roll bar structure by embodiment of this invention. It is a principal part expansion perspective view which shows the connection part of the roll bar of the roll bar structure by embodiment of this invention, a cross bar, and a side panel. It is sectional drawing seen along the IX-IX line of FIG. It is sectional drawing seen along the XX line of FIG. It is a principal part expansion perspective view which shows the belt anchor attachment member and belt anchor of a roll bar structure by embodiment of this invention. It is a principal part expansion perspective view which shows the belt anchor attachment member of the roll bar structure by embodiment of this invention. It is a principal part expansion perspective view which shows the connection part of the roll bar and side panel of the roll bar structure by embodiment of this invention. It is a principal part expansion perspective view which shows the connection member of the roll bar of the roll bar structure by embodiment of this invention, and a downward connection member. It is sectional drawing seen along the XV-XV line | wire of FIG. It is a principal part expansion perspective view which shows the connection part of the roll bar and side panel of the roll bar structure by the modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 12 Side panel 18 Cross member 28 Top 30 Link bracket 36 Top storage part 38 Fuel tank 40 Roll bar structure 42 Roll bar 44 Cross bar 46 Upper connection member 48 Lower connection member 50 Belt anchor attachment member 56 Front side cross bar member 58 Rear side crossbar member 66 Recessed part (front side crossbar member)
70 hole (front crossbar member)
72 Flange (front crossbar member)
80 Roll bar support part 82 Flange part (rear side crossbar member)
84 Recess (rear crossbar member)
86 Opening 88 Notch 90 Bead 94 Spacer member 96, 98 Fastening member 106 Belt anchor 110 Upper surface part (belt anchor attachment member)
112 Front (belt anchor mounting member)
120 connecting member 124 mounting portion (connecting member)
126 Flange (connection member)
128 hole (roll bar)
132 Bolt 134 Weld Nut 140 Hole (Downward Connection Member)
142 Temporary bolt 148 Lower connecting member

Claims (4)

A roll bar structure for a vehicle including a pair of side panels constituting both side surfaces of a vehicle body and link brackets provided on these side panels to rotatably support an open roof,
A roll bar extending upward;
A cross bar coupled to the roll bar and extending in the vehicle width direction;
A connecting member for connecting the roll bar and the link bracket;
Have
A roll bar structure for a vehicle, wherein the cross bar is coupled to the connecting member together with the roll bar.   The roll bar structure for a vehicle according to claim 1, wherein the roll bar and the connecting member are coupled by a fastening member that penetrates both of them.   The roll bar structure for a vehicle according to claim 1, wherein the cross bar is coupled to the roll bar and the connecting member by a fastening member that passes through the cross bar, the roll bar, and the connecting member.   4. The vehicle roll bar structure according to claim 2, wherein a plurality of the fastening members are provided apart from each other in the vehicle vertical direction.

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