JP2017210153A - Joined structure of vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect objects such as peripheral parts in a joined part between a plurality of vehicle body component members by a screw member.SOLUTION: A joined structure of a vehicle body has a plurality of vehicle body component members 16, 22, 30 having joining surface parts 19a, 22, 63, and a screw member 70 penetrating the joining surface parts 19a, 22, 63 of the vehicle body component members, in which the plurality of vehicle body component members are joined to each other by the screw member 70. In the joined structure, the vehicle body component member 30 on the tip 76 side of the screw member 70 among the vehicle body component members is provided with an opposite part 69 opposed to the tip 76 of the screw member 70.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicle body joining structure using a screw member, and belongs to the field of vehicle body production technology.

  In recent years, in the automobile production technology field, there has been an increasing demand for weight reduction of the vehicle body in order to further improve the fuel consumption performance. Along with this, lightweight materials such as aluminum-based materials have been used as materials for vehicle body components. The demand for materials is increasing. When a vehicle body is configured by using a light-weight material together with an iron-based material such as a steel material that has been conventionally used, it is necessary to perform bonding between vehicle body constituent members made of different materials.

  Since joining between dissimilar metal materials is difficult by welding, it is generally performed using SPR (self-piercing rivet) or blind rivet.

  Joining by SPR is performed by driving a rivet loaded in the receiver into the metal plate in a state where a plurality of stacked metal plates are sandwiched between the receiver and the die, and expanding the tip of the rivet according to the shape of the die. Done in This bonding method has an advantage that it is not necessary to make a pilot hole in the metal plate, but has a disadvantage that can be applied only when a space for setting the receiver and the die can be secured on both sides of the bonded portion. In addition, rivets may not be driven into a high-strength material such as a high-tensile steel plate (High Ten).

  Joining with a blind rivet is achieved by inserting a rivet attached to the tip of the tool into a pilot hole formed in advance in the metal plate, penetrating from one side of the metal plate to the other, and then drawing the tool into the one side. Then, it is performed by caulking a rivet on the other side of the metal plate. While this joining method has an advantage that joining can be performed by work from one side of the metal plate, there is a drawback that it takes time and effort to make a pilot hole in the metal plate.

  Under such circumstances, it has been studied or put into practical use to join vehicle body constituent members made of different materials using other joining techniques.

  As one type of such a joining technique, Patent Document 1 discloses a technique related to a self-tapping screw member that is screwed while forming screw holes in a plurality of members to be joined that do not have pilot holes.

  The self-tapping screw member disclosed in Patent Document 1 generates frictional heat between the tip portion and the contact surface of the member to be joined by pressing the tip to the member to be joined and rotating at high speed. The surrounding base material is screwed while being plasticized by this heat. When the screw member penetrates the member to be joined, the plasticized base material is extended in the axial direction along the screw member, so that a long screw hole is formed in the axial direction. Strong bonding is possible.

  If this type of joining technique using a screw member is applied to joining between vehicle body constituent members, joining is performed by work from one side of the joined portion without opening a pilot hole in the joined portion of the vehicle body constituting member. In addition, it is possible to firmly join the vehicle body constituent members made of different materials.

Japanese National Patent Publication No. 4-506243

  However, when the above-described screw member is used for joining between the vehicle body constituent members, the sharp tip of the screw member protrudes from the joint portion of the vehicle body constituent member, so that the screw member is disposed around the joint portion. Peripheral parts such as harnesses may come into contact with and damage the tip of the screw member during assembly or maintenance.

  Therefore, an object of the present invention is to protect an object such as a peripheral part at a joint portion between a plurality of vehicle body constituent members by a screw member.

  In order to solve the above-described problems, the vehicle body joining structure according to the present invention is configured as follows.

First, the vehicle body joining structure according to the first aspect of the present invention is as follows.
A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and screw members penetrating through the joint surface portions of the vehicle body constituent members, wherein the plurality of vehicle body constituent members are joined to each other by the screw members. There,
Of the vehicle body component members, the vehicle body component member on the distal end side of the screw member is provided with a facing portion facing the distal end of the screw member.

The invention according to claim 2 is the invention according to claim 1,
The vehicle body constituting member on the distal end side of the screw member includes a pair of side surface portions opposed to each other, a connecting surface portion that connects one end portions of these side surface portions, and an end portion on the other side of at least one of the side surface portions. And a flange portion that forms the joint surface portion, and a facing surface portion that extends from the side surface portion to the anti-contact surface portion side so as to form the facing portion.

The invention according to claim 3 is the invention according to claim 1,
The vehicle body constituting member on the distal end side of the screw member includes a pair of side surface portions opposed to each other, a connecting surface portion that connects one end portions of these side surface portions, and an end portion on the other side of at least one of the side surface portions. Extending from the same side as the communication surface portion, and having a flange portion forming the joint surface portion,
The connecting surface portion forms the facing portion.

The invention according to claim 4 is the invention according to claim 1,
The screw member is screwed perpendicularly to the joint surface portion of the vehicle body component member,
The vehicle body constituting member on the distal end side of the screw member is provided with a facing wall portion that protrudes from the joining surface portion in an inclined direction that forms an acute corner portion between the screw member and the joining surface portion, and forms the facing portion. It is characterized by being.

The invention according to claim 5 is the invention according to claim 4,
The vehicle body constituting member on the distal end side of the screw member includes a first side surface portion that forms the opposing wall portion, a second side surface portion that faces the first side surface portion, and one side of the first and second side surface portions. And a flange portion that extends from the other end portion of the first side surface portion to the anti-contact surface portion side to form the joint surface portion.

The invention according to claim 6 is the invention according to claim 4,
The vehicle body constituting member on the distal end side of the screw member includes a first side surface portion and a second side surface portion facing each other, a communication surface portion connecting one end portions of the first and second side surface portions, and the first side surface portion. A flange portion extending from the other end portion of the side surface portion to the anti-contact surface portion side, forming the joint surface portion, and straddling between the first side surface portion and the flange portion; And a rib to be formed.

Moreover, the joining structure of the vehicle body concerning the invention of Claim 7 of this application is
A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and a screw member for joining these vehicle body constituent members at the joint surface portions,
Of the vehicle body component members, the vehicle body component member on the distal end side of the screw member is provided with a protrusion protruding from the joint surface portion to the distal end side of the screw member,
The tip of the screw member is located inside the protrusion.

Furthermore, the joining structure of the vehicle body according to the invention described in claim 8 of the present application is:
A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and screw members penetrating through the joint surface portions of the vehicle body constituent members, wherein the plurality of vehicle body constituent members are joined to each other by the screw members. There,
Of the vehicle body component members, the vehicle body component member on the distal end side of the screw member is provided with a receiving portion for receiving an object approaching the screw member from the distal end side.

  First, according to the first aspect of the present invention, of the plurality of vehicle body structural members joined to each other by the screw member, the vehicle body structural member on the distal end side of the screw member is provided with a facing portion that faces the distal end of the screw member. Therefore, when the peripheral part is assembled or maintained, the screw member is formed by interposing the facing portion between the screw member and an object such as a peripheral part that approaches the screw member from the tip side. The contact between the front end of the object and the object is suppressed, so that the object can be prevented from being damaged.

  According to the second aspect of the present invention, the opposing surface portion extending from the side surface portion of the vehicle body constituting member is disposed opposite to the tip of the screw member that penetrates the flange portion of the vehicle body constituting member, so that the peripheral parts can be assembled. At the time of maintenance or maintenance, the object can be protected by interposing the opposing surface portion between the screw member and an object such as a peripheral component that approaches the screw member from the tip side. Further, by providing the vehicle body component member with the opposing surface portion extending from the side surface portion, the rigidity of the vehicle body component member can be increased with respect to bending in a direction parallel to the direction in which the opposing surface portion extends.

  According to the third aspect of the present invention, the protruding portion of the screw member protruding from the flange portion of the vehicle body component member is sandwiched between the pair of side surface portions of the vehicle body component member, and at the tip of the screw member, When the connecting surface portions of the constituent members are arranged to face each other, the peripheral member or the like approaching the screw member from the side or the tip side thereof and the screw member at the time of assembly or maintenance of the peripheral component, and the screw member. By interposing the side surface portion or the communication surface portion, the object can be protected more effectively.

  According to the invention described in claim 4, the joint surface portion is formed so that an acute corner portion is formed between the joint surface portion and the tip of the screw member penetrating perpendicularly to the joint surface portion of the vehicle body constituting member. Since the opposing wall portion that is inclined faces the object, the object that approaches the screw member from the front end side can be protected using the inclined opposing wall portion.

  When the invention according to claim 5 is applied to the invention according to claim 4, the first side surface portion of the vehicle body constituting member forms an acute corner portion between the flange portion and the flange portion. Since it is provided in an inclined manner, the first side surface portion prevents contact of an object such as a peripheral part with the tip of the screw member, and is applied to the flange portion like a general hat-shaped body component member. Compared with the case where the first side surface portion is disposed at a right angle, the distance between the end of the first side surface portion on the side opposite to the flange and the neutral shaft is increased, so that the secondary cross section of the vehicle body component member The moment is increased. Therefore, it is possible to improve rigidity and buckling strength against bending of the vehicle body constituent member.

  When the invention described in claim 6 is applied to the invention described in claim 4, a corner portion between the flange portion and the rib extending between the first side surface portion and the flange portion of the vehicle body constituting member is acute. Since the rib is provided so as to be inclined with respect to the flange portion, the ribs are used to reinforce the vehicle body structural member while preventing contact of objects such as peripheral parts to the tip of the screw member. Can do.

  According to the invention described in claim 7, since the tip of the screw member that joins the plurality of vehicle body structural members is located inside the projection provided on the vehicle body structural member, During maintenance, etc., the protrusion is interposed between an object such as a peripheral part that approaches the tip of the screw member and the screw member, thereby preventing contact between the tip of the screw member and the object. , Damage to the object can be prevented.

  Furthermore, according to the invention described in claim 8, when the peripheral part is assembled or maintained, an object such as a peripheral part that approaches the screw member from the tip side is provided on the vehicle body constituent member. , The contact between the tip of the screw member and the object is suppressed, whereby the object can be prevented from being damaged.

It is the perspective view which looked at the floor surface of the vehicle interior space in the vehicle which has the joining structure of the vehicle body concerning 1st Embodiment of this invention, and its peripheral part from the vehicle body rear upper side. It is the perspective view which looked at the rear side frame and its peripheral part in the vehicle from the rear upper side of the vehicle body. It is a bottom view which shows the torque box and its peripheral part in the vehicle. It is the sectional view on the AA line of FIG. 3 which shows the cross-sectional shape of the horizontal frame part of the same torque box. It is the BB sectional drawing of FIG. 3 which shows the cross-sectional shape of the front-and-rear frame part of the same torque box. It is the figure which looked at the screw member from the side. FIG. 6 is an enlarged cross-sectional view of FIG. 5 showing an enlarged view of the joint between the floor reinforcement and the front and rear frame portions of the torque box. It is an expanded sectional view which shows the junction part of the horizontal frame part of a torque box, and a toe board. It is a bottom view which shows a rear floor panel and its peripheral part. It is CC sectional view taken on the line of FIG. 9 which shows a cross member and its peripheral part. It is an expanded sectional view which shows the junction part of a cross member and a rear floor panel. FIG. 6 is a cross-sectional view similar to FIG. 5 illustrating a cross-sectional shape of a front and rear frame portion of a torque box in a vehicle having a vehicle body joint structure according to a second embodiment of the present invention. It is an expanded sectional view which shows the junction part of the floor reinforcement in the 3rd Embodiment of this invention, and the front-and-rear frame part of a torque box. It is a bottom view which shows the torque box and its peripheral part in 4th Embodiment of this invention. FIG. 15 is a cross-sectional view taken along the line DD of FIG. 14 when the first flange portion of the front and rear frame portion and the peripheral portion thereof in the torque box are viewed from the vehicle body width direction. It is the EE sectional view taken on the line of FIG. 14 which looked at the front-back frame part of the torque box from the length direction. It is an expanded sectional view of FIG. 16 which expands and shows the junction part of a floor reinforcement and the front-and-rear frame part of a torque box.

  Hereinafter, the details of the joint structure for a vehicle body according to the present invention will be described for each embodiment with reference to the accompanying drawings. In the following description, terms indicating directions such as “front”, “rear”, “right”, “left”, “up”, “down”, and the like are used unless otherwise specified. Each direction of the vehicle body when the traveling direction during forward traveling is set to “front” shall be indicated. Further, in the accompanying drawings, reference numeral “X” is attached to the vehicle body width direction, reference symbol “Y” is attached to the vehicle body longitudinal direction, and reference symbol “Z” is attached to the vehicle body vertical direction.

[First Embodiment]
As shown in FIGS. 1 and 2, the automobile 1 having the vehicle body joining structure according to the first embodiment includes a floor panel 2, a pair of left and right side sills 4, a pair of left and right roof rails 6, a pair of left and right hinge pillars 10, and a pair of left and right sides. The center pillar 12, a pair of left and right rear pillars 14, a dash panel 20, and a toe board 22 are provided.

  The floor panel 2 is a member constituting the floor surface of the vehicle interior space. A floor tunnel 2a extending in the longitudinal direction Y of the vehicle body is provided at the center of the vehicle body width direction X of the floor panel 2, and an exhaust pipe, a harness, and the like are disposed in the floor tunnel 2a. A pair of left and right floor reinforcements 16 extending in the longitudinal direction Y of the vehicle body are joined to the upper surfaces of the floor panel 2 and the toe board 22.

  The side sill 4 is provided so as to extend in the vehicle body longitudinal direction Y along the end of the floor panel 2 in the vehicle width direction X. The roof rail 6 is provided so as to extend in the vehicle body front-rear direction Y on the upper side of the vehicle body of the side sill 4.

  The hinge pillar 10 straddles between the front ends of the side sill 4 and the roof rail 6, the center pillar 12 straddles between the intermediate portions of the side sill 4 and the roof rail 6, and the rear pillar 14 extends behind the side sill 4 and the roof rail 6. They are provided so as to extend in the vehicle body up-down direction Z across the end portions.

  The dash panel 20 is disposed so as to extend in the vehicle body width direction X between the left and right hinge pillars 10, thereby partitioning the vehicle interior space and the engine room in the vehicle body longitudinal direction Y.

  The toe board 22 is disposed across the floor panel 2 and the dash panel 20. The toe board 22 is disposed so as to be inclined toward the vehicle body upper side toward the vehicle body front side. The rear end portion of the toe board 22 is joined to the front end portion of the floor panel 2 by, for example, welding, and the front end portion of the toe board 22 is joined to the lower end portion of the dash panel 20 by, for example, welding.

  FIG. 3 is a bottom view of the toe board 22 as viewed from the lower side of the vehicle body on the right side and the periphery thereof.

  As shown in FIG. 3, the automobile 1 includes a pair of left and right front side frames 24 extending from the dash panel 20 (see FIG. 1) to the front side of the vehicle body, and a pair of left and right sides extending in the vehicle body longitudinal direction Y along the lower surface of the floor panel 2. The floor frame 26 and a pair of left and right torque boxes 30 for connecting the rear end portion of the front side frame 24 to the front end portion of the floor frame 26 and the front end portion of the side sill 4 are further provided.

  3 shows only the front side frame 24, the floor frame 26, and the torque box 30 on the right side of the vehicle body, the same front side frame 24, floor frame 26, and torque box 30 are also provided on the left side of the vehicle body. Is provided.

  The front side frame 24 and the floor frame 26 are disposed at substantially the same position in the vehicle body width direction X and inside the side sill 4. The front side frame 24 is disposed above the side sill 4 and the floor frame 26 in the vehicle body vertical direction Z. The floor reinforcement 16 (see FIG. 1) is disposed above the vehicle body of the floor frame 26 with the floor panel 2 interposed therebetween.

  The torque box 30 includes a front / rear frame portion 32 extending in the vehicle body longitudinal direction Y and a lateral frame portion 33 extending in the vehicle body width direction X. The torque box 30 is made of, for example, an aluminum alloy, and is integrally formed by, for example, die casting.

  The front / rear frame portion 32 is disposed so as to extend in the vehicle body longitudinal direction Y along the lower surface of the toe board 22 and the lower surface of the front end portion of the floor panel 2. The front and rear frame portions 32 are connected to the rear end portion of the front side frame 24 at the front end portion, and are connected to the front end portion of the floor frame 26 at the rear end portion.

  As shown in FIG. 2, the rear end portion of the rear side frame 28 extending in the vehicle body longitudinal direction Y is connected to the rear end portion of the floor frame 26. The impact load input to the front side frame 24 from the front side of the vehicle body is laid between the floor panel 2, the rear side frame 28, and the left and right rear side frames 28 via the front and rear frame portions 32 and the floor frame 26 of the torque box 30. This is transmitted to the rear floor panel 78 and the like, and thereby effective load distribution to the rear side of the vehicle body is realized.

  The lateral frame portion 33 is provided so as to extend outward from the front and rear frame portion 32 in the vehicle body width direction X, and is joined to the front end portion of the side sill 4 at an outer end portion thereof. Thus, the horizontal frame portion 33 is provided across the front and rear frame portions 32 and the side sill 4.

  As described above, the front side frame 24 and the side sill 4 are connected to each other via the torque box 30, thereby suppressing the twist of the front side frame 24, thereby improving the running stability of the automobile 1. It is illustrated. Further, since the impact load input to the front side frame 24 from the front side of the vehicle body is transmitted to the side sill 4 via the torque box 30, more effective load distribution to the rear side of the vehicle body is possible. .

  As shown in FIG. 4, the horizontal frame portion 33 is opposed to the lower front side of the vehicle body at the front end portion of the toe board 22 with a space therebetween, and is inclined to be disposed on the upper side of the vehicle body toward the front side of the vehicle body. A front surface portion 42 extending from the front end of the inclined surface portion 41 to the vehicle body upper side, a lower surface portion 43 extending substantially horizontally from the rear end of the inclined surface portion 41 to the vehicle body rear side, and extending from the rear end of the lower surface portion 43 to the vehicle body upper side. The rear surface portion 44 is disposed opposite to the vehicle body rear side of the portion 42 with a gap, and the flange portion 45 extends from the upper end of the rear surface portion 44 to the vehicle body rear side.

  In this way, the horizontal frame portion 33 is formed in a groove shape that opens to the vehicle body upper side and extends in the vehicle body width direction X as a whole. The lower surface portion 43 of the horizontal frame portion 33 is disposed so as to overlap the front end of the toe board 22 in the vehicle body longitudinal direction Y, and the inclined surface portion 41 and the front surface portion 42 are disposed on the front side of the vehicle body from the front end of the toe board 22. ing. A portion of the front side of the toe board 22 on the front side of the vehicle body in the open upper surface portion of the horizontal frame portion 33 is closed by a lid member 50.

  The rear surface portion 44 is disposed along the vehicle body vertical direction Z, and the flange portion 45 is disposed along the lower surface of the toe board 22 so as to be inclined toward the vehicle body front side toward the vehicle body upper side. Thus, an acute corner portion K2 (see FIG. 8) is formed between the rear surface portion 44 and the flange portion 45 when viewed from the length direction of the horizontal frame portion 33 (vehicle body width direction X).

  The flange portion 45 is joined to the lower surface of the toe board 22 by a self-tapping screw member 70 described later. In addition to the screw member 70, an adhesive may be used in combination for joining the toe board 22 and the flange portion 45.

  The lid member 50 is made of, for example, a steel plate. The lid member 50 includes an upper surface portion 51 disposed on the vehicle body upper side of the inclined surface portion 41 of the horizontal frame portion 33, a front flange portion 52 extending from the front end of the upper surface portion 51 to the vehicle body lower side, and a rear end of the upper surface portion 51. A rear flange portion 53 extending upward of the vehicle body is provided.

  The front flange portion 52 of the lid member 50 is joined to the front surface portion 42 of the lateral frame portion 33 by, for example, SPR (self-piercing rivet) or a screw member, and the rear flange portion 53 is toeboard via the dash panel 20 by, for example, welding. 22 is joined to the front end portion. Thus, a closed cross section that is continuous in the vehicle body width direction X is formed between the toe board 22, the lateral frame portion 33, and the lid member 50.

  As shown in FIGS. 3 and 4, the front / rear frame portion 32 is a rear side as a first straight portion that extends in a substantially horizontal straight line from the connecting portion with the floor frame 26 to the front side of the vehicle body along the vehicle body front-rear direction Y. A front side inclination as a second straight part that extends from the horizontal part 34 to the front end of the rear side horizontal part 34 via a curved part 35 and extends linearly along the direction inclined toward the vehicle body upper side toward the vehicle body front side. Part 36.

  The front / rear frame portion 32 is joined to the floor reinforcement 16 (see FIG. 1) with the toe board 22 or the floor panel 2 sandwiched between the connecting portion with the horizontal frame portion 33 and the vehicle body rear side portion.

  As shown in FIG. 5, the floor reinforcement 16 is a hat-shaped member that is open to the lower side of the vehicle body, and is made of, for example, a high-tensile steel plate. The floor reinforcement 16 includes an upper surface portion 17 facing the toe board 22 or the floor panel 2, a pair of side surface portions 18a and 18b extending downward from both ends of the upper surface portion 17 in the vehicle body width direction X, and side surfaces thereof. A pair of flange portions 19a, 19b extending in the vehicle body width direction X from the lower ends of the portions 18a, 18b, respectively, are provided.

  The front / rear frame portion 32 of the torque box 30 has a generally hat-shaped cross-sectional shape that opens to the upper side of the vehicle body at a portion that overlaps the floor reinforcement 16 in the vehicle body longitudinal direction Y.

  The front-rear frame portion 32 includes a first side surface portion 61 and a second side surface portion 62 facing each other, a lower surface portion 60 as a connecting surface portion connecting the lower ends of the first and second side surface portions 61 and 62, and a first side surface. A first flange portion 63 extending in the vehicle body width direction X from the upper end of the portion 61 outward (on the opposite lower surface portion 60 side) and a vehicle body width direction X from the upper end of the second side surface portion 62 outward (on the opposite lower surface portion 60 side). And a second flange portion 64 extending in the direction.

  The front / rear frame portion 32 further includes a pair of left and right opposing surface portions 69 extending in the vehicle body width direction X from the lower ends of the first side surface portion 61 and the second side surface portion 62 to the outside (on the opposite lower surface portion 60 side). . These facing surface portions 69 are provided so as to continue in the vehicle body width direction X via the lower surface portion 60. By providing the opposing surface portion 69 extending in the vehicle body width direction X as described above, the rigidity of the front and rear frame portions 32 against bending in the vehicle body width direction X is improved.

  Each facing surface portion 69 is disposed to face the lower side of the vehicle body of the first flange portion 63 or the second flange portion 64 with a space therebetween. Note that the facing surface portion 69 does not necessarily have to be provided so as to extend from the lower end of the first side surface portion 61 or the second side surface portion 62, and extends from an intermediate portion of the first side surface portion 61 or the second side surface portion 62. It may be provided.

  The first side surface portion 61, the second side surface portion 62, and the lower surface portion 60 have substantially the same thickness. The thickness of the facing surface portion 69 is smaller than the thickness of the lower surface portion 60. Thereby, a closed cross section that is continuous in the vehicle body longitudinal direction Y is formed between the relatively thick first side surface portion 61, the second side surface portion 62, the lower surface portion 60, and the toe board 22 or the floor panel 2, The rigidity of the front and rear frame portions 32 against bending can be improved, and the torque box 30 can be reduced in weight by reducing the thickness of the facing surface portion 69.

  The front and rear frame portion 32 has a U-shaped cross-sectional shape composed of the first and second side surface portions 61 and 62 and the lower surface portion 60 similar to the above in the vehicle body front side portion of the front end of the floor reinforcement 16. have.

  The front / rear frame portion 32 is joined to the floor reinforcement 16 via the toe board 22 or the floor panel 2 using a plurality of self-tapping screw members 70. In addition to the screw member 70, an adhesive may be used in combination for joining the front / rear frame portion 32 and the floor reinforcement 16.

  The plurality of screw members 70 are driven at appropriate intervals in the longitudinal direction of the front and rear frame portions 32 and the floor reinforcement 16 so that their joint strength can be sufficiently secured.

  Referring to FIGS. 6 and 7, the joining by the screw member 70 is described by taking as an example the joining portion of the flange portion 19 a of the floor reinforcement 16 sandwiching the toe board 22 and the first flange portion 63 of the front and rear frame portion 32. Will be described in detail.

  As with the screw member disclosed in Patent Document 1 (Japanese Patent Publication No. 4-506243) described above, the screw member 70 includes a plurality of members to be joined (in the example shown in FIG. The flange 16a of the reinforcement 16 and the toe board 22 and the first flange 63 of the front and rear frame 32 of the torque box 30) are screwed while forming screw holes.

  The screw member 70 has a head portion 71 and a shaft portion 74 extending from the head portion 71. A circumferential groove 72 (see FIG. 7) surrounding the base end portion of the shaft portion 74 is formed on the surface of the head portion 71 on the shaft portion 74 side. The shaft portion 74 has a screw portion 75 provided from the base end portion to the intermediate portion, and a sharp tip 76.

  When the floor reinforcement 16 and the front and rear frame portions 32 are joined via the toe board 22, the screw member 70 is rotated at a high speed and the flange portion 19a of the floor reinforcement 16 in which no pilot hole is formed, the toe board 22. Driven into the first flange portion 63 of the front and rear frame portion 32 from the vehicle body upper side (floor reinforcement 16 side).

  When the shaft portion 74 of the screw member 70 passes through the flange portion 19 a of the floor reinforcement 16, the toe board 22, and the first flange portion 63 of the front and rear frame portion 32, the joint surface portions 19 a, 22, 63 with respect to the shaft portion 74. Frictional heat is generated between the contact surface and the outer peripheral surface of the shaft portion 74, and screw holes are formed in the joint surface portions 19 a, 22, and 63 plasticized around the shaft portion 74 by this heat. The screw member 70 is screwed into the screw.

  Thus, since the screw member 70 is driven while plasticizing the base material, the screw member 70 can easily penetrate the hard floor reinforcement 16 made of a high-tensile steel plate.

  In the first flange portion 63 of the front and rear frame portion 32, a base material plasticized when the shaft portion 74 of the screw member 70 penetrates is extended along the shaft portion 74 toward the front end side in the axial direction, thereby lowering the vehicle body lower side. A projecting portion 63a projecting into the shape is formed. Further, the base material plasticized when the shaft portion 74 of the screw member 70 passes through the flange portion 19a of the floor reinforcement 16 is extended in the axial direction, so that it protrudes to the upper side of the vehicle body and surrounds the periphery of the screw member 70. A protrusion 19c that is received in the groove 72 is formed.

  Thereby, in the joint surface portions 19a, 22, and 63 into which the screw member 70 is screwed, a screw hole is increased by forming a long screw hole in the axial direction, so that the floor reinforcement 16 and the toe board 22 made of a steel plate are formed. In contrast, the front and rear frame portions 32 of the torque box 30 made of an aluminum alloy can be firmly joined.

  Further, by using this type of screw member 70, the joint surface portions 19a, 22, and 63 can be joined only by work from the upper side of the vehicle body without making a pilot hole in the joint surface portions 19a, 22, and 63.

  As shown in FIG. 7, each screw member 70 is screwed in at right angles to the joint surface portions 19 a, 22, and 63. The distal end portion of the shaft portion 74 of each screw member 70 protrudes from the first flange portion 63 of the front and rear frame portion 32 to the vehicle body lower side.

  On the vehicle body lower side of the tip 76 of the screw member 70, the above-described facing surface portion 69 is disposed so as to face. The facing surface portion 69 is orthogonal to the axis L1 of the screw member 70.

  In the above, although the structure of the junction part via the toe board 22 and its periphery part was demonstrated, the structure of the junction part (refer FIG.3 and FIG.4) via the floor panel 2 and its periphery part is also the same.

  Further, as shown in FIG. 5, the second flange portion 64 of the front / rear frame portion 32 also has a floor reinforcement formed by a plurality of screw members 70 via the toe board 22 or the floor panel 2 in the same manner as the first flange portion 63. It is joined to the flange portion 19b of the ment 16. Similarly to the first flange portion 63, the second flange portion 64 is also formed with a protruding portion 64 a that protrudes toward the lower side of the vehicle body, thereby increasing the screw allowance with the screw member 70. Further, the facing surface portion 69 is also disposed opposite to the vehicle body lower side of the tip 76 of the screw member 70 protruding from the second flange portion 64 to the vehicle body lower side.

  As described above, since the opposing surface portion 69 is opposed to the tip of each screw member 70 that protrudes from the first flange portion 63 and the second flange portion 64 of the front and rear frame portion 32 to the lower side of the vehicle body, At the time of attachment or maintenance, an opposing surface portion 69 is interposed between the screw member 70 and an object such as a peripheral component that approaches the screw member 70 from the tip 76 side. Therefore, an object such as a peripheral component that approaches the screw member 70 from the front end 76 side is received by the facing surface portion 69 provided in the front and rear frame portion 32, so that contact with the front end 76 of the screw member 70 is suppressed. Thereby, damage to the object can be prevented.

  As shown by the two-dot chain line in FIG. 5, the front and rear frame portion 32 is further provided with folded portions 67 and 68 extending from the ends of the first flange portion 63 and the second flange portion 64 to the vehicle body lower side. May be. In this case, since the approach of the object from the vehicle body width direction X to the tip of the screw member 70 is more effectively prevented by the folded portions 67 and 68, damage to the object due to contact with the tip of the screw member 70 is more effective. Can be suppressed.

  FIG. 8 is an enlarged cross-sectional view showing a joint portion between the horizontal frame portion 33 and the toe board 22 of the torque box 30. In this joining, the flange portion 45 of the horizontal frame portion 33 is joined to the toe board 22 by a plurality of screw members 70 similar to the above.

  In this joining, the plurality of screw members 70 are driven at appropriate intervals in the longitudinal direction of the lateral frame portion 33 so that the joining strength can be sufficiently secured. Each screw member 70 is driven into the toe board 22 and the flange portion 45 from the upper side of the vehicle body (toe board 22 side).

  The flange portion 45 has a protruding portion 45a that protrudes downward on the vehicle body by a base material plasticized when the shaft portion 74 of the screw member 70 penetrates being extended toward the distal end side in the axial direction along the shaft portion 74. Is formed. Further, the toe board 22 protrudes upward in the vehicle body and is accommodated in the circumferential groove 72 of the screw member 70 when the base material plasticized when the shaft portion 74 of the screw member 70 penetrates is extended in the axial direction. A portion 22a is formed.

  Thereby, in the joint surface parts 22 and 45 into which the screw member 70 is screwed, a screw hole is increased by forming a long screw hole in the axial direction. Therefore, the toe board 22 made of a steel plate is made of an aluminum alloy. The horizontal frame portion 33 of the torque box 30 can be firmly joined.

  The distal end portion of the shaft portion 74 of each screw member 70 protrudes from the flange portion 45 to the vehicle body lower side. Such a protruding portion of the screw member 70 is disposed adjacent to the rear side of the rear surface portion 44 of the horizontal frame portion 33 on the vehicle body side.

  Each screw member 70 is screwed so as to be orthogonal to the joint surface portions 22 and 45. Thereby, the axial center L2 of each screw member 70 is arranged at right angles to the first flange portion 63 of the front and rear frame portion 32 in a side view of the vehicle body.

  On the other hand, the rear surface portion 44 extending from the front end of the flange portion 45 to the vehicle body lower side is disposed along the vehicle body vertical direction Z, that is, along the direction inclined with respect to the flange portion 45 in the vehicle body side view. Yes. Thereby, an acute corner portion K2 is formed between the flange portion 45 and the rear surface portion 44 in a side view of the vehicle body.

  The rear surface portion 44 intersects the axis L2 of the screw member 70. Thus, the rear surface portion 44 constitutes an opposing wall portion that faces the tip 76 of the screw member 70 that penetrates the toe board 22 and the flange portion 45.

  Therefore, the rear surface portion 44 is interposed between the screw member 70 and an object such as a peripheral component that approaches the screw member 70 from the front end side thereof, that is, the front lower side of the vehicle body, so that the front end 76 of the screw member 70 and the object The contact with the object is suppressed, whereby the object can be protected.

  In addition, since the object from the tip 76 of the screw member 70 can be protected by using the rear surface portion 44 of the horizontal frame portion 33, a dedicated opposing wall portion facing the tip 76 of the screw member 70 is provided in the horizontal frame. There is no need to add to the portion 33, thereby simplifying the structure of the torque box 30.

  Note that, as indicated by a two-dot chain line in FIG. 8, the horizontal frame portion 33 may further include a folded portion 46 extending from the rear end of the flange portion 45 to the vehicle body lower side. In this case, the approach of the object from the rear side of the vehicle body to the front end 76 of the screw member 70 is more effectively prevented by the folded-back portion 46, so that damage to the object due to contact with the front end 76 of the screw member 70 is more effective. Can be suppressed.

  As shown in the bottom view of FIG. 9, along the both ends of the rear floor panel 78 in the vehicle body width direction X, rear side frames 28 are arranged so as to extend in the vehicle body front-rear direction Y, respectively. A cross member 80 extending in the vehicle body width direction X is installed between them.

  As shown in FIG. 10, at the vehicle body longitudinal direction Y position where the cross member 80 is disposed, the rear floor panel 78 is an inclined surface portion inclined toward the vehicle body upper side toward the vehicle body rear side. The rear floor panel 78 is made of, for example, a steel plate.

  Plate-shaped seat belt anchors 101 and 102 for supporting a rear seat belt (not shown) are fixed at positions adjacent to the front side of the vehicle body of the cross member 80 in the rear floor panel 78. The seat belt anchors 101 and 102 are fixed to the upper surface of the rear floor panel 78 by bolts 106 in a state where two seat belt anchors 101 and 102 are stacked in the vehicle body vertical direction Z. These seat belt anchors 101 and 102 are disposed at a plurality of locations (for example, two locations) in the vehicle body width direction X.

  The cross member 80 includes an upper cross member 81 disposed on the upper surface side of the rear floor panel 78 and a lower cross member 91 disposed on the lower surface side of the rear floor panel 78. The upper cross member 81 is made of, for example, a steel plate. The lower cross member 91 is made of, for example, an aluminum alloy, and is formed by, for example, die casting.

  The upper cross member 81 is a hat-shaped member opened to the vehicle body lower side. The upper cross member 81 includes a front surface portion 82 and a rear surface portion 83 that are opposed to each other in the longitudinal direction Y of the vehicle body, an upper surface portion 84 as a communication surface portion that connects the upper end of the front surface portion 82 and the upper end of the rear surface portion 83, The front flange portion 85 extends from the lower end of the portion 82 to the front side of the vehicle body, and the rear flange portion 86 extends from the lower end of the rear surface portion 83 to the rear side of the vehicle body.

  The upper surface portion 84 of the upper cross member 81 is disposed substantially perpendicularly to the vehicle body vertical direction Z, the front surface portion 82 is inclined toward the vehicle body lower side toward the vehicle body front, and the rear surface portion 83 is directed toward the vehicle body rear side. It is inclined to the vehicle body lower side. The front flange portion 85 and the rear flange portion 86 are joint surface portions that are joined to the rear floor panel 78, and are disposed along the upper surface of the rear floor panel 78.

  The lower cross member 91 is a member having a hat-shaped cross section that opens to the upper side of the vehicle body. The lower cross member 91 includes a front surface portion 92 and a rear surface portion 93 that are opposed to each other with a space in the longitudinal direction Y of the vehicle body, and a lower surface portion 94 as a connecting surface portion that connects the lower end of the front surface portion 92 and the lower end of the rear surface portion 93. The front flange portion 95 extends from the upper end of the front surface portion 92 toward the vehicle body front side, and the rear flange portion 96 extends from the upper end of the rear surface portion 93 toward the vehicle body rear side.

  The lower surface portion 94 of the lower cross member 91 is disposed substantially perpendicular to the vehicle body vertical direction Z, and the front surface portion 92 and the rear surface portion 93 are disposed along the vehicle body vertical direction Z in a side view of the vehicle body. The front flange portion 95 and the rear flange portion 96 are joint surface portions that are joined to the rear floor panel 78, and are disposed along the lower surface of the rear floor panel 78.

  As shown in FIGS. 9 and 10, the front flange portion 95 of the lower cross member 91 is provided with a pair of left and right front extension portions 95 a extending to the front side of the vehicle body. The bolts 106 for fixing the seat belt anchors 101 and 102 to the rear floor panel 78 are inserted into the respective front extensions 95a.

  On the lower surface side of the rear floor panel 78, a plate-like anchor reinforcing member 98 is disposed so as to face the seat belt anchors 101 and 102 with the rear floor panel 78 interposed therebetween.

  The anchor reinforcement member 98 includes a base surface portion 98a disposed along the lower surface of the front flange portion 95 at the vehicle body width direction X position where the front extension portion 95a of the lower cross member 91 is provided, and the vehicle body from the rear end of the base surface portion 98a. The lower extension 98b is disposed along the front surface of the front surface 92 of the lower cross member 91, and extends from the lower end of the lower extension 98b to the vehicle body rear side. A rear extension 98 c is provided along the lower surface of the lower surface portion 94.

  A nut 104 is fixed to the lower surface of the base surface portion 98a of the anchor reinforcing member 98 by welding, for example. Bolts 106 inserted into the nut 104 from the upper side of the vehicle body and penetrate the upper and lower seat belt anchors 101, 102, the rear floor panel 78, the front extension 95 a of the lower cross member 91 and the base surface 98 a of the anchor reinforcement member 98. Are fastened by screwing, whereby the seat belt anchors 101 and 102 and the anchor reinforcement member 98 are fixed to the rear floor panel 78.

  The rear extension 98c of the anchor reinforcement member 98 is fixed to the lower surface portion 94 of the lower cross member 91 by welding, for example.

  Since the anchor reinforcing member 98 is joined to the lower cross member 91 in this way, the impact load input to the seat belt anchors 101 and 102 by the operation of the rear seat belt device (not shown) is It is transmitted to the lower cross member 91 via the anchor reinforcing member 98 and further transmitted to the rear side frame 28 via the cross member 80. By such load distribution, stress concentration on the fixing portion of the seat belt anchors 101 and 102 in the rear floor panel 78 is suppressed, and deformation of the rear floor panel 78 is suppressed.

  The rear flange portions 86 and 96 of the upper cross member 81 and the lower cross member 91 are joined to each other by, for example, SPR (self-piercing rivet) via the rear floor panel 78.

  The front flange portions 85 and 95 of the upper cross member 81 and the lower cross member 91 are joined to each other by a plurality of screw members 70 similar to the above via the rear floor panel 78.

  In this joining, the plurality of screw members 70 are driven in from the upper side of the vehicle body at appropriate intervals in the longitudinal direction of the cross member 80 so as to ensure sufficient joining strength. In addition to the screw member 70, an adhesive may be used in combination for the joining between the front flange portions 85 and 95.

  In this way, the upper cross member 81 and the lower cross member 91 are joined with the rear floor panel 78 interposed therebetween, so that the upper cross member 81 and the rear floor panel 78 and the lower cross member 91 and the rear floor panel 78 are joined together. Between the two, a closed cross section that is continuous in the vehicle body width direction X is formed.

  With reference to FIG. 11, the structure of the joint part between the front flange parts 85 and 95 of the upper cross member 81 and the lower cross member 91 and its peripheral part will be described.

  A base material plasticized when the shaft portion 74 of the screw member 70 passes through the front flange portion 85 of the lower cross member 91 is extended along the shaft portion 74 toward the front end side in the axial direction, thereby lowering the vehicle body lower side. A projecting portion 95a projecting to the top is formed. Further, the front flange portion 85 of the upper cross member 81 is extended in the axial direction by a base material plasticized when the shaft portion 74 of the screw member 70 penetrates, thereby projecting upward on the vehicle body and surrounding the screw member 70. A protruding portion 85 a that is received in the groove 72 is formed.

  Thereby, in the joint surface portions 78, 85, and 95 into which the screw member 70 is screwed, a screw hole is increased by forming a long screw hole in the axial direction. Therefore, the rear floor panel 78 and the upper cross member 81 made of a steel plate are increased. On the other hand, the lower cross member 91 made of an aluminum alloy can be firmly joined.

  The tip end portion of the shaft portion 74 of each screw member 70 protrudes from the front flange portion 95 of the lower cross member 91 to the vehicle body lower side. Such a protruding portion of the screw member 70 is disposed adjacent to the front side of the vehicle body of the front surface portion 92 of the lower cross member 91.

  Each screw member 70 is screwed so as to be orthogonal to the joint surface portions 78, 85, 95. Thereby, the axial center L3 of each screw member 70 is arranged at right angles to the front flange portion 95 of the lower cross member 91 in a side view of the vehicle body.

  On the other hand, the front surface portion 92 extending from the rear end of the front flange portion 95 to the vehicle body lower side is along the vehicle body vertical direction Z, that is, along the direction inclined with respect to the front flange portion 95 in the vehicle body side view. Has been placed. Thereby, an acute corner portion K3 is formed between the front flange portion 95 and the front surface portion 92 in a side view of the vehicle body.

  The front surface portion 92 intersects the axis L3 of the screw member 70. Thus, the front surface portion 92 constitutes an opposing wall portion that faces the tip 76 of the screw member 70. Therefore, the front surface portion 92 is interposed between the screw member 70 and an object such as a peripheral component approaching the screw member 70 from the tip 76 side thereof, that is, the rear lower side of the vehicle body, so that the tip 76 of the screw member 70 Contact with an object is suppressed, and thus the object can be protected.

  Further, since the front surface portion 92 of the lower cross member 91 can be used to protect the object from the tip 76 of the screw member 70, a dedicated opposing wall portion that faces the tip 76 of the screw member 70 is provided below. There is no need to add to the side cross member 91, thereby simplifying the structure of the lower cross member 91.

  As described above, the front surface portion 92 of the lower cross member 91 is provided to be inclined with respect to the front flange portion 95 so as to form an acute corner portion K3 with the front flange portion 95. Between the front flange portion 95 and the front surface portion 92, it is difficult to secure a space for arranging a welding gun or a receiver, a die or the like used for SPR joining.

  In this regard, the screw member 70 used in the present embodiment can join the front flange portions 85 and 95 by work only from the upper surface side of the rear floor panel 78, so that it is not necessary to secure the above space.

  In the present embodiment, as shown by the two-dot chain line in FIG. 10, the general cross-sectional shape in which the front surface portion 192 forms a right angle or obtuse corner portion with respect to the front flange portion 95 is as follows. In contrast, by forming the acute corner portion K3, the lower end of the front surface portion 92 is positioned on the vehicle body front side, and the lower surface portion 94 is extended on the vehicle body front side. Thereby, in the closed cross section between the lower cross member 91 and the rear floor panel 78, the distance between the neutral shaft (not shown) extending in the vehicle body width direction X and the lower end of the front portion 92 is increased. Thus, the cross-sectional secondary moment of the lower cross member 91 is increased.

  For this reason, it is possible to improve the bending rigidity and buckling strength of the cross member 80, thereby improving the rigidity of the vehicle body and the function of transmitting the load from the cross member 80 to the rear side frame 28. .

[Second Embodiment]
A vehicle body joining structure according to the second embodiment will be described with reference to FIG. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIG. 12, the description is abbreviate | omitted.

  FIG. 12 is an enlarged cross-sectional view showing a joint portion between the front and rear frame portion 32 and the floor reinforcement 16 and its peripheral portion in the second embodiment.

  As shown in FIG. 12, in the second embodiment, the configuration of the front and rear frame portions 32 of the torque box 30 is different from that of the first embodiment. Specifically, the cross-sectional shape of the portion of the front / rear frame portion 32 that overlaps the floor reinforcement 16 and the vehicle body longitudinal direction Y is different from that of the first embodiment.

  In the second embodiment, the front / rear frame portion 32 includes a first side surface portion 261 and a second side surface portion 262 facing each other, and a lower surface portion as a communication surface portion that connects lower ends of the first and second side surface portions 261 and 262. 260, a first flange portion 263 extending in the vehicle body width direction X from the upper end of the first side surface portion 261 to the inner side (the same side as the lower surface portion 260), and an inner side (lower surface portion 260 and the second flange portion 262). A second flange portion 264 extending in the vehicle body width direction X toward the same side.

  The first flange portion 263 and the second flange portion 264 are joined to the flange portions 19a and 19b of the floor reinforcement 16 via the toe board 22 or the floor panel 2 by the screw member 70 as in the first embodiment. Yes.

  The protruding portions of the screw members 70 protruding from the first flange portion 263 and the second flange portion 264 to the vehicle body lower side are sandwiched between the first and second side surface portions 261, 262, and the tip ends of the screw members 70. The lower surface portion 260 is disposed so as to face each other. In this way, the protruding portion of the screw member 70 is disposed in the inner space of the front and rear frame portion 32.

  Therefore, the first or second side surface portion between an object such as a peripheral component that approaches the screw member 70 from the side or the tip side and the protruding portion of the screw member 70 at the time of assembly or maintenance of the peripheral component. By interposing the 261, 262 or the lower surface portion 260, the object can be protected more effectively.

[Third Embodiment]
A vehicle body joining structure according to the third embodiment will be described with reference to FIG. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIG. 13, the description is abbreviate | omitted.

  In 3rd Embodiment, the structure of the junction part of the front-and-rear frame part 32 of the torque box 30 and the floor reinforcement 16 differs from 1st Embodiment.

  FIG. 13 is an enlarged cross-sectional view showing a joint portion between the first flange portion 63 of the front and rear frame portion 32 and the flange portion 19a of the floor reinforcement 16 and its peripheral portion in the third embodiment.

  In addition, although illustration is abbreviate | omitted, the junction part of the 2nd flange part 64 of the front-and-rear frame part 32 and the flange part 19b of the floor reinforcement 16 also has the joining structure similar to the junction part shown in FIG.

  As shown in FIG. 13, in the third embodiment, the front and rear frame part 32 is provided with a protrusion 360 that protrudes from the first flange part 63 to the vehicle body lower side. A plurality of protrusions 360 are provided at intervals in the longitudinal direction Y of the vehicle body in accordance with the joining position where the screw member 70 is driven.

  These protrusions 360 are similarly provided in the second flange part 64, but in the following description, the protrusions 360 provided in the first flange part 63 and the configuration related thereto will be described.

  The protrusion 360 is a portion that is pushed in by the ejector pin when the torque box 30 is released. Since the protrusion 360 has a thickness larger than that of the peripheral portion of the first flange portion 63, deformation of the first flange portion 63 when pressed by the ejector pin is suppressed.

  The projecting portion 360 is provided at least at a location where the screw member 70 is driven in the first flange portion 63. Each protrusion 360 is formed in a columnar shape, for example. However, the cross-sectional shape of the protrusion 360 is not limited to a circle, and for example, a prismatic or other columnar protrusion 360 may be provided.

  The outer diameter of the protrusion 360 is larger than the outer diameter of the shaft portion 74 of the screw member 70. The protruding height of the protrusion 360 from the lower surface of the first flange portion 63 is larger than the protruding amount of the screw member 70 from the lower surface of the first flange portion 63. As a result, the screw member 70 driven into the first flange portion 63 does not penetrate the protruding portion 360, and the tip 76 of the screw member 70 is located inside the protruding portion 360.

  The projecting portion 360 configured as described above has an outer peripheral covering portion 361 that covers the protruding portion of the screw member 70 from the radially outer side, and a tip covering portion 362 that faces the tip 76 of the screw member 70. Therefore, exposure of the tip of the screw member 70 can be avoided by using the projection 360 as a highly rigid portion pressed by the ejector pin.

  Therefore, the outer periphery of the projection 360 is covered between the screw member 70 and an object such as a peripheral component that approaches the distal end portion of the screw member 70 from the side or the distal end 76 side during assembly or maintenance of the peripheral components. By interposing the portion 361 or the tip covering portion 362, the contact between the tip 76 of the screw member 70 and the object is effectively suppressed by the projection 360, and thereby damage to the object can be suppressed. .

  In the description of the third embodiment, the configuration of the joint portion between the front and rear frame portion 32 of the torque box 30 and the floor reinforcement 16 has been described, but the flange portion 45 of the lateral frame portion 33 of the torque box 30 or A similar projecting portion 360 may be provided on the front flange portion 95 of the lower cross member 91. In these cases, the projecting portion 360 joins the flange portion 45 of the lateral frame portion 33 and the toe board 22, or A similar effect can be obtained by avoiding the exposure of the tip of the screw member 70 used for joining between the front flange portions 85 and 95 of the upper cross member 81 and the lower cross member 91 via the rear floor panel 78. .

[Fourth Embodiment]
Subsequently, a vehicle body joining structure according to the fourth embodiment will be described with reference to FIGS. 14 to 17. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIGS. 14-17, the description is abbreviate | omitted.

  As shown in FIG. 14, also in the fourth embodiment, the torque box 30 includes a front and rear frame portion 32 and a lateral frame portion 33, and the front and rear frame portion 32 has a rear side horizontal portion 34, a curved portion 35, and a front side inclination. A portion 36 is provided. That is, as shown in FIG. 15, the front and rear frame portion 32 is curved at the bending portion 35, and the front side inclined portion 36 is inclined in the vehicle body vertical direction Z with respect to the vehicle body longitudinal direction Y (horizontal direction). Has been placed.

  Therefore, when an impact load is input from the front side of the vehicle body to the front and rear frame portion 32 of the torque box 30 via the front side frame 24, the front and rear frame portion 32 has an inclination angle of the front side inclined portion 36 with respect to the horizontal direction. A bending moment that increases the bending angle is likely to occur, and stress is likely to concentrate on the curved portion 35.

  Therefore, in the fourth embodiment, as shown in FIGS. 14 to 16, the first and second ribs 65 and 66 as described below are provided in the front and rear frame part 32, thereby the front and rear frame part. 32 is improved in rigidity. Therefore, when the bending moment as described above is generated, the deformation of the cross section of the bending portion 35 and the front inclined portion 36 of the front and rear frame portion 32 is suppressed, and the stress concentration on the bending portion 35 is suppressed, whereby the bending is suppressed. Buckling of the front and rear frame portions that are bent and deformed at the portion 35 is suppressed. Thereby, the load transmission from the front side frame 24 to the vehicle body rear side via the front-rear frame part 32 can be performed satisfactorily.

  The first rib 65 is provided across the first side surface portion 61 and the first flange portion 63, and the second rib 66 is provided across the second side surface portion 62 and the second flange portion 64. It has been. A plurality of first ribs 65 and second ribs 66 are provided from the curved portion 35 of the front and rear frame portion 32 to the front inclined portion 36 at intervals in the length direction of the front and rear frame portion 32.

  The plurality of first ribs 65 are arranged in parallel to each other along a plane perpendicular to the vehicle body longitudinal direction Y. The plurality of second ribs 66 are also arranged in parallel to each other along a plane perpendicular to the vehicle body longitudinal direction Y. As described above, since all the first ribs 65 and the second ribs 66 are formed in parallel, all the first ribs 65 and the second ribs 66 can be easily formed while reducing the number of mold surfaces in die casting. In this way, the mold structure can be simplified, and as a result, productivity can be improved.

  As shown in FIG. 17, the protrusions on the distal end side of each screw member 70 that penetrates the first flange portion 63 of the front and rear frame portion 32 are a pair of first portions provided in an inclined manner with respect to the first flange portion 63. It arrange | positions so that it may be pinched | interposed between the ribs 65 from the both sides of the vehicle body front-back direction Y.

  Each screw member 70 is screwed so as to be orthogonal to the joint surface portions 19a, 22 and 63. Thereby, the axial center L4 of each screw member 70 is disposed at right angles to the first flange portion 63 of the front and rear frame portion 32 in a side view of the vehicle body.

  On the other hand, the first ribs 65 projecting from the first flange portion 63 to the vehicle body lower side in the front and rear frame portion 32 are along the vehicle body vertical direction Z, that is, with respect to the first flange portion 63 in the vehicle body side view. Are arranged along the inclined direction. Thus, an acute corner portion K4 is formed between each first rib 65 and a portion of the first flange portion 63 that extends from the upper end of the first rib 65 toward the rear lower side of the vehicle body in a side view of the vehicle body. Yes.

  The first rib 65 is provided so as to intersect the axis L4 of the screw member 70. However, the first rib 65 and the axis L4 of the screw member 70 do not necessarily cross each other, and the lower end of the first rib 65 is arranged at a position slightly shifted from the axis L4 of the screw member 70 to the vehicle body upper side. May be.

  As shown in FIG. 16, the entire protruding portion of the screw member 70 from the first flange portion 63 is disposed so as to overlap the first rib 65 when viewed from the length direction of the front and rear frame portion 32.

  The first rib 65 has a triangular shape when viewed from the length direction of the front and rear frame portion 32, and the vehicle body width direction X dimension of the first rib 65 decreases toward the vehicle body lower side. However, the specific shape of the first rib 65 is not particularly limited.

  Due to the positional relationship between the screw member 70 and the first rib 65 as described above, the first rib 65 adjacent to the vehicle body front side of the screw member 70 is opposed to the tip of the screw member 70 as shown in FIG. It constitutes the wall.

  Similarly to the first flange portion 63, the second flange portion 64 of the front and rear frame portion 32 is also joined to the flange portion 19 b of the floor reinforcement 16 via the toe board 22 or the floor panel 2 by a plurality of screw members 70. ing. In addition, the screw member 70 used for this joining is sandwiched between a pair of second ribs 66 adjacent to each other in the vehicle body longitudinal direction Y. The configuration of the second rib 66 and the positional relationship with the screw member 70 are as follows. It is the same as the rib 65. Therefore, the second rib 66 adjacent to the vehicle body front side of the screw member 70 also constitutes an opposing wall portion facing the tip of the screw member 70.

  As described above, the protruding portion of the screw member 70 penetrating the first flange portion 63 and the second flange portion 64 of the front / rear frame portion 32 has the pair of first ribs 65 or the protruding portions from both sides in the vehicle body front-rear direction Y. By being sandwiched between the pair of second ribs 66, when the peripheral parts such as the harness are assembled or maintained, the protruding portion of the screw member 70 and the objects such as the peripheral parts approaching from the longitudinal direction Y of the vehicle body Since the contact is blocked by the pair of first ribs 65 or the pair of second ribs 66, the contact of the object with the tip 76 of the screw member 70 can be suppressed.

  Further, since the first rib 65 or the second rib 66 adjacent to the front side of the vehicle body is opposed to the front end 76 of each screw member 70, the screw member 70 is approached from its front end side, that is, the front lower side of the vehicle body. Contact between an object such as a component and the tip 76 of the screw member 70 is suppressed.

  Further, an object larger than the distance between the first ribs 65 or the second ribs 66 adjacent in the vehicle body longitudinal direction Y approaches the tip 76 of the screw member 70 directly below the vehicle body vertical direction Z or from the vehicle body width direction X. Even in this case, it is possible to suppress contact with the tip 76 of the screw member 70 by interfering with the first rib 65 or the second rib 66.

  As described above, the object contact with the tip 76 of the screw member 70 is blocked by the first rib 65 and the second rib 66, so that the object can be effectively prevented from being damaged.

  In addition, since the first rib 65 and the second rib 66 provided to reinforce the front and rear frame portion 32 as described above can be used to protect the object from the tip 76 of the screw member 70, There is no need to provide a dedicated wall portion for protection in the torque box 30, thereby simplifying the structure of the torque box 30.

  16, the front-rear frame portion 32 is further provided with folded portions 67, 68 extending from the end portions of the first flange portion 63 and the second flange portion 64 to the vehicle body lower side. May be. In this case, since the approach of the object from the vehicle body width direction X to the tip of the screw member 70 is more effectively prevented by the folded portions 67 and 68, damage to the object due to contact with the tip of the screw member 70 is more effective. Can be suppressed.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the above-described embodiment, the present invention has been described by taking the torque box 30 having the front and rear frame portions 32 and the horizontal frame portion 33 as an example, but the specific configuration of the torque box 30 is not particularly limited, For example, the present invention can be applied to a torque box having only the lateral frame portion 33 or a torque box having only the front and rear frame portions 32.

  Further, in the above-described embodiment, the cross member 80 includes the upper cross member 81 and the lower cross member 91, and a joint portion between the upper cross member 81 and the lower cross member 91 via the rear floor panel 78 is taken as an example. Although the present invention has been described above, the configuration of the cross member 80 is not limited to this. For example, the cross member 80 may be configured by only the lower cross member 91, and in this case, the present invention can be applied to the joining of the lower cross member 91 and the rear floor panel 78.

  Further, the present invention provides a joint portion between the front and rear frame portions 32 of the torque box 30 and the floor reinforcement 16 via the toe board 22 or the floor panel 2, a joint portion between the lateral frame portion 33 of the torque box 30 and the toe board 22, In addition to the joint portion between the upper cross member 81 and the lower cross member 91 via the rear floor panel 78, the present invention can be applied to any joint portion between vehicle body components.

  Further, in the above-described embodiment, the present invention has been described by taking the joint portion by the self-tapping screw member 70 as an example, but the present invention can also be applied to a joint portion by a screw member that is not self-tapping type.

  Furthermore, in the above-described embodiment, the example in which the present invention is applied to the joint portion between the vehicle body constituent members made of different metal materials has been described. However, the present invention is similarly applied to the joint portion between the vehicle body constituent members made of the same kind of material. Applicable to.

  As described above, according to the present invention, it is possible to protect an object such as a peripheral part at a joint portion between a plurality of vehicle body constituent members by a screw member. There is a possibility of being suitably used in the field of manufacturing automobiles where members are joined.

DESCRIPTION OF SYMBOLS 1 Automobile 2 Floor panel 4 Side sill 6 Roof rail 10 Hinge pillar 12 Center pillar 14 Rear pillar 16 Floor reinforcement 19a, 19b Flange part (joint surface part)
20 Dash panel 22 Toe board (joint surface)
24 Front side frame 26 Floor frame 28 Rear side frame 30 Torque box 32 Front and rear frame part 33 Horizontal frame part 34 Rear side horizontal part (first straight part)
35 Curved portion 36 Front side inclined portion (second straight line portion)
41 Inclined surface portion 42 Front portion 43 Lower surface portion 44 Rear surface portion 45 Flange portion (joint surface portion)
46 Folding part 50 Lid member 60 Lower surface part (contact surface part)
61 1st side surface part 62 2nd side surface part 63 1st flange part (joint surface part)
64 Second flange (joint surface)
65 1st rib 66 2nd rib 67, 68 Folding part 69 Opposing surface part (opposing part) (receiving part)
DESCRIPTION OF SYMBOLS 70 Screw member 71 Head 74 Shaft part 76 Tip 78 Rear floor panel 80 Cross member 81 Upper cross member 91 Lower cross member 92 Front part 95 Front flange part 95a Front extension part 98 Anchor reinforcement member 101,102 Seat belt anchor 104 Nut 106 Bolt 260 Lower surface part (contact surface part) (opposite part)
261 First side surface portion 262 Second side surface portion 263 First flange portion (joint surface portion)
H.264 Second flange (joint surface)
360 protrusion

Claims (8)

A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and screw members penetrating through the joint surface portions of the vehicle body constituent members, wherein the plurality of vehicle body constituent members are joined to each other by the screw members. There,
The vehicle body joining structure according to claim 1, wherein the vehicle body constituting member on the distal end side of the screw member among the vehicle body constituting members is provided with a facing portion facing the tip of the screw member.   The vehicle body constituting member on the distal end side of the screw member includes a pair of side surface portions opposed to each other, a connecting surface portion that connects one end portions of these side surface portions, and an end portion on the other side of at least one of the side surface portions. A flange portion extending from the side surface to the anti-contact surface portion side to form the joint surface portion, and an opposing surface portion extending from the side surface portion to the anti-contact surface portion side so as to form the counter portion. The vehicle body joint structure described in 1. The vehicle body constituting member on the distal end side of the screw member includes a pair of side surface portions opposed to each other, a connecting surface portion that connects one end portions of these side surface portions, and an end portion on the other side of at least one of the side surface portions. Extending from the same side as the communication surface portion, and having a flange portion forming the joint surface portion,
The vehicle body joint structure according to claim 1, wherein the communication surface portion forms the facing portion. The screw member is screwed perpendicularly to the joint surface portion of the vehicle body component member,
The vehicle body constituting member on the distal end side of the screw member is provided with a facing wall portion that protrudes from the joining surface portion in an inclined direction that forms an acute corner portion between the screw member and the joining surface portion, and forms the facing portion. The vehicle body joining structure according to claim 1, wherein:   The vehicle body constituting member on the distal end side of the screw member includes a first side surface portion that forms the opposing wall portion, a second side surface portion that faces the first side surface portion, and one side of the first and second side surface portions. 5. A connecting surface portion that connects the end portions of the first side surface portion and a flange portion that extends from the other end portion of the first side surface portion to the anti-contact surface portion side to form the joint surface portion. The vehicle body joint structure described.   The vehicle body constituting member on the distal end side of the screw member includes a first side surface portion and a second side surface portion facing each other, a communication surface portion connecting one end portions of the first and second side surface portions, and the first side surface portion. A flange portion extending from the other end portion of the side surface portion to the anti-contact surface portion side, forming the joint surface portion, and straddling between the first side surface portion and the flange portion; The vehicle body joint structure according to claim 4, further comprising a rib to be formed. A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and a screw member for joining these vehicle body constituent members at the joint surface portions,
Of the vehicle body component members, the vehicle body component member on the distal end side of the screw member is provided with a protrusion protruding from the joint surface portion to the distal end side of the screw member,
A joint structure for a vehicle body, wherein a tip of the screw member is located inside the protrusion. A vehicle body joining structure having a plurality of vehicle body constituent members having joint surface portions and screw members penetrating through the joint surface portions of the vehicle body constituent members, wherein the plurality of vehicle body constituent members are joined to each other by the screw members. There,
The vehicle body joint member on the front end side of the screw member among the vehicle body constituent members is provided with a receiving portion for receiving an object approaching from the front end side of the screw member. .

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