JP2016074241A - Joining part structure of skeleton member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently introduce air in a closed cross section into an air vent hole.SOLUTION: In a joining part structure S of a skeleton member, a slope part 50 of a floor panel 30 is connected to an air vent bead 40, and the air vent bead 40 is protruded to an upper side with respect to a rear flange 18 of a cross member 10. Therefore, the slope part 50 can be arranged at the upper side with respect to the rear flange 18. By this constitution, even if an adhesive 22 is protruded into a closed cross section 24, the slope part 50 can be arranged at an upper side with respect to the adhesive 22. Accordingly, it is prevented that the air moving to an air vent hole 60 side along the slope part 50 is hung at the adhesive 22. The slope part 50 is inclined to a downstream side as progressing toward the inside of a vehicle width direction from the air vent bead 40 when viewed from a rear side, and therefore, the air in the closed cross section 24 can be efficiently moved toward the air vent hole 60 from the outside of the vehicle width direction along an internal peripheral face of the slope part 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint structure of a skeleton member.

  In the panel bonding structure described in Patent Document 1 below, a pair of panels are formed in a cross-sectional hat shape (open cross-sectional shape). And the flange which comprises the width direction both ends of a panel is joined via the adhesive agent. Thus, a closed cross section is formed by the pair of panels. The pair of flanges are formed with beads having a substantially semicircular cross section, and an air passage (air vent hole) is formed by the pair of beads. Thereby, when electrodeposition coating is performed with a pair of panels joined, air in the closed cross section can be discharged from the air passage.

JP 2013-136076 A

  By the way, as shown in FIG. 7, there is the following problem in the form in which the pair of panels is configured by the first panel having a substantially flat plate shape and the second panel having an open cross-sectional shape. That is, when the air in the closed cross section is extracted from the air passage, the air in the closed cross section moves toward the air passage along the flat panel. In particular, at the joint portion between the first panel and the second panel, the air in contact with the flat plate-like first panel moves in the longitudinal direction of the second panel toward the air passage (shown by the dotted line in FIG. 7). See arrow). On the other hand, in the bonded state of the first panel and the second panel, the adhesive may partially protrude into the closed cross section. In this case, there is a possibility that air in the closed cross section is caught by the protruding adhesive and an air pocket (air pocket) is generated. Therefore, there is a possibility that the air in the closed cross section cannot be efficiently guided to the air passage (air vent hole).

  In view of the above facts, the present invention has an object to provide a joint structure for a skeleton member that can efficiently guide air in a closed cross section to an air vent hole.

  The joint structure of the skeleton member according to claim 1 is formed in an elongated shape in which the vehicle width direction is the longitudinal direction and the vehicle longitudinal direction is the width direction, and has an open cross-sectional shape opened to the vehicle upper side, A skeleton member having flanges formed at both ends in the width direction; and a skeleton member disposed on the vehicle upper side of the skeleton member with a vehicle vertical direction being a plate thickness direction and joined to the flange via an adhesive. A panel member that forms a closed cross-section and a portion of the panel member that is opposed to the flange on one side in the width direction of the skeleton member, and that protrudes toward the vehicle upper side with respect to the flange and is inside the closed cross-section. And a bead portion that forms an air vent hole that communicates with the outside by the flange, and a portion that forms the closed cross section of the panel member, and is connected to the bead portion and the bone When viewed from the width direction of the member and a, a slope portion which is inclined to the vehicle lower side as it goes outward in the vehicle width direction from the bead portion.

  The joint structure of the skeleton member according to claim 1 includes a skeleton member formed in an elongated shape having the vehicle width direction as a longitudinal direction, and the width direction of the skeleton member is a vehicle front-rear direction. This skeleton member has an open cross-sectional shape opened to the upper side of the vehicle, and flanges are formed at both ends in the width direction of the skeleton member. Further, a panel member is arranged on the vehicle upper side of the skeleton member with the vehicle vertical direction as the plate thickness direction. The panel member is bonded to the flange of the skeleton member via an adhesive, and a closed cross section is formed by the panel member and the skeleton member.

  Moreover, the bead part is formed in the panel member, and the bead part is arranged to face the flange on one side in the width direction of the skeleton member, and is raised to the vehicle upper side with respect to the flange. An air vent hole is formed by the flange and the bead portion, and the inside and the outside of the closed cross section communicate with each other through the air vent hole. For this reason, when electrodepositing both in the state where the skeleton member and the panel member are joined, the air in the closed cross section can be extracted (exhausted) from the air vent hole.

  Here, the site | part which forms the closed cross section in a panel member is made into the slope part, and the slope part is connected to the bead part. As described above, since the bead is raised to the upper side of the vehicle with respect to the flange, the slope portion can be disposed on the upper side of the vehicle with respect to the flange. For this reason, even when the adhesive protrudes into the closed cross section, the slope portion can be disposed on the vehicle upper side with respect to the adhesive. Thereby, when the air in a closed cross section moves toward an air vent hole along a slope part in a vehicle width direction, it can suppress that the said air being caught by an adhesive agent. In other words, it is possible to suppress the occurrence of air pockets (air pockets) when air in the closed cross section is extracted from the air vent hole.

  In addition, as seen from the width direction of the skeleton member, the slope portion is inclined downward from the bead portion toward the vehicle width direction outer side. For this reason, in the panel member, it is comprised so that a bead part may be located highest. Thereby, the air in a closed cross section can be efficiently moved from the vehicle width direction outer side to an air vent hole along the inner peripheral surface of a slope part. As described above, the air in the closed cross section can be efficiently guided to the air vent hole.

  The joint structure of the skeleton member according to claim 2 is the joint structure of the skeleton member according to claim 1, wherein the slope portion is seen from the vehicle width direction and the slope portion extends from the bead portion to the other width direction of the skeleton member. The vehicle is inclined downward as it goes to the side.

  The joint structure of the skeleton member according to claim 2 is configured such that the position of the slope portion in the vehicle vertical direction seen from the vehicle width direction becomes higher toward the bead portion. Thereby, the air in a closed cross section can be efficiently moved toward the air vent hole side from the width direction other side of a skeleton member along the inner peripheral surface of a slope part. Therefore, the air in the closed cross section can be more efficiently guided to the air vent hole.

  The joint structure of the skeleton member according to claim 3 is the joint structure of the skeleton member according to claim 1 or 2, wherein a plurality of the bead portions are formed and arranged side by side in the vehicle width direction. Has been.

  In the joint structure of the skeleton member according to the third aspect, since a plurality of bead portions are formed, the opening area of each air vent hole can be reduced. For this reason, for example, the width dimension of the bead portion can be set small. Thereby, for example, when the opening of each air vent hole is sealed with the seal member, the application region of the seal member can be narrowed.

  According to the joint structure of the skeleton member according to claim 1 and claim 2, the air in the closed cross section can be efficiently guided to the air vent hole.

  According to the panel joining structure of the third aspect, the opening area of the air vent hole can be reduced.

It is the perspective view seen from the vehicle left diagonal back which shows the state where the cross member and floor panel of the vehicle to which the junction part structure of the skeleton member concerning this embodiment was applied. (A) is the expanded side sectional view (2A-2A sectional view taken on the line of FIG. 1) seen from the vehicle left side which shows the site | part of the 2nd slope part of the floor panel shown by FIG. 1, (B), It is the expanded side sectional view (2B-2B sectional view taken on the line of FIG. 1) seen from the vehicle left side which shows the 1st slope part of the floor panel shown in FIG. 1, and the site | part of an air bleeding bead. FIG. 3 is an enlarged side sectional view (an enlarged view of a portion A in FIG. 2B) showing the air vent bead shown in FIG. It is explanatory drawing for demonstrating a state when the vehicle to which the junction part structure of the skeleton member which concerns on this Embodiment is applied enters an electrodeposition tank. (A) demonstrates the movement of the air in the closed cross section in the site | part of the 2nd slope part of a floor panel when the cross member shown in FIG. 2 (A) and a floor panel are put into an electrodeposition tank. FIG. 2B is an explanatory diagram viewed from the left side of the vehicle, and FIG. 2B is a first slope portion of the floor panel when the cross member and the floor panel shown in FIG. It is explanatory drawing seen from the vehicle left side for demonstrating the movement of the air in the closed cross section in the site | part of an air release bead. It is explanatory drawing seen from the vehicle left diagonal front for demonstrating the movement of the air in a closed cross section when the cross member shown in FIG. 1 and a floor panel are entered into an electrodeposition tank. It is explanatory drawing for demonstrating the movement of the air in the closed cross section in a prior art.

  Hereinafter, the joint structure S of the skeleton member according to the present embodiment will be described with reference to the drawings. An arrow FR appropriately shown in the drawings is a vehicle front side of a vehicle (automobile) V to which the joint structure S of the skeleton member is applied, an arrow UP is a vehicle upper side, and an arrow LH is a vehicle left side (vehicle width direction). One side). In the following description, when using the front / rear, up / down, and left / right directions, unless otherwise indicated, the front / rear direction of the vehicle, the up / down direction of the vehicle, the left / right direction of the vehicle (when facing the front) To do.

  As illustrated in FIG. 1, the joint structure S of the skeleton member is applied to a joint portion between a cross member 10 as a “skeleton member” and a floor panel 30 as a “panel member”. The cross member 10 and the floor panel 30 are members constituting the lower part of the vehicle V.

  As shown in FIGS. 2A and 2B, the cross member 10 is made of a steel plate and is formed in a long shape with the vehicle width direction as the longitudinal direction. The width direction of the cross member 10 coincides with the vehicle front-rear direction, one side in the width direction of the cross member 10 is the vehicle rear side, and the other side in the width direction of the cross member 10 is the vehicle front side.

  Furthermore, the cross member 10 is formed in a substantially hat-shaped cross section (open cross-sectional shape) opened upward as viewed from the longitudinal direction. Specifically, the cross member 10 includes a bottom wall 12 that is disposed with the plate thickness direction as the vertical direction, a rear wall 14 that extends upward from the rear end of the bottom wall 12, and a front wall that extends upward from the front end of the bottom wall 12. A wall 16 is included. The cross member 10 includes a rear flange 18 as a “flange” projecting from the upper end of the rear wall 14 to the rear side, and a front flange 20 as a “flange” projecting from the upper end of the front wall 16 to the front side. And have.

  The floor panel 30 is made of a steel plate and has a substantially flat plate shape. In the drawing, for convenience, only the peripheral portion of the cross member 10 in the floor panel 30 is illustrated. Further, the floor panel 30 is disposed on the upper side of the cross member 10 with the vertical direction as the plate thickness direction. The floor panel 30 is joined to the front flange 20 and the rear flange 18 of the cross member 10. Specifically, an adhesive 22 (see FIG. 1) is interposed between the front flange 20 and the floor panel 30 in the vehicle width direction. In this state, the front flange 20 and the floor panel 30 are spot welded. It is joined by etc. Further, an adhesive 22 (see FIG. 1) is interposed between the rear flange 18 and the floor panel 30 in a vehicle width direction at a portion excluding an air vent bead 40 described later. In this state, the rear flange 18 And the floor panel 30 are joined by spot welding or the like.

  Thereby, as shown in FIG. 1, a closed cross section 24 is formed by the cross member 10 and the floor panel 30. A joint portion of the floor panel 30 with the front flange 20 is a front joint portion 32 (in a broad sense, an element grasped as a “joint portion”), and the front joint portion 32 extends along the front flange 20. Extending in the vehicle width direction. Further, the joint portion of the floor panel 30 with the rear flange 18 is a plurality (two in this embodiment) of rear joint portions 34 (elements grasped as “joint portions” in a broad sense). ing. Moreover, the rear side joining part 34 is comprised by the 1st back side joining part 36 and the 2nd back side joining part 38 which make a pair, and the 1st back side joining part 36 and the 2nd back side joining part which make a pair are comprised. 38 extends in the vehicle width direction along the rear flange 18 with an air vent bead 40 described later interposed therebetween. And the rear side junction part 34 is arrange | positioned along with the vehicle width direction.

  In addition, an air vent bead 40 as a “bead portion” is formed in the floor panel 30 at a portion between the first rear joint portion 36 and the second rear joint portion 38. That is, a plurality (two in the present embodiment) of air vent beads 40 are formed on the floor panel 30 facing the rear flange 18 of the cross member 10, and the air vent beads 40 are arranged in the vehicle width direction. They are arranged side by side at a predetermined interval. The air vent bead 40 is raised upward (in the direction of separation) with respect to the rear flange 18 and extends in the front-rear direction. Thereby, as shown in FIG. 2 (B), an air vent hole 60 is formed between the air vent bead 40 and the rear flange 18 so as to communicate the inside and the outside of the closed cross section 24. Hereinafter, the configuration of the air vent bead 40 will be described.

  As shown in FIG. 3, the air vent bead 40 includes a bead main body portion 42 that constitutes an intermediate portion in the front-rear direction of the air vent bead 40, a first bead inclined portion 44 that constitutes a front portion of the air vent bead 40, And a second bead inclined portion 46 that constitutes a rear portion of the air vent bead 40.

  The bead body portion 42 is disposed on the upper side with respect to the front end side portion of the rear flange 18 in the cross member 10 with the vertical direction as the plate thickness direction. That is, the bead main body 42 is spaced apart upward from the tip of the rear flange 18 and is disposed in parallel with the rear flange 18. Thereby, the air vent hole 60 is opened to the rear side. Further, the rear end portion of the bead main body portion 42 protrudes rearward from the rear flange 18 in plan view. Further, after electrodeposition coating of the vehicle V (the floor panel 30 and the cross member 10), a sealer 62 (which is an element grasped as a “seal member” in a broad sense) is applied to the tip of the rear flange 18. The space between the tip of the rear flange 18 and the bead main body 42 is sealed by a sealer 62. The separation distance H (vertical dimension) between the rear flange 18 and the bead body 42 is a distance (1 to 1.5 mm as an example) that can be sealed between the rear flange 18 and the bead body 42 by the sealer 62. Is set.

  The first bead inclined portion 44 is disposed above the proximal end portion of the rear flange 18 in the cross member 10 and extends from the front end of the bead main body portion 42 to the front side. Specifically, the 1st bead inclination part 44 inclines upward as it goes to the front side in the cross sectional view seen from the vehicle width direction. Further, the front-rear position at the front end of the first bead inclined portion 44 is set to the front side with respect to the rear flange 18. That is, the front end portion of the first bead inclined portion 44 projects forward with respect to the rear flange 18 (the rear wall 14 of the cross member 10). Furthermore, in a cross-sectional view as viewed from the vehicle width direction, the inclination angle A1 of the first bead inclined portion 44 (angle formed by the rear flange 18 and the first bead inclined portion 44) with respect to the horizontal direction (vehicle longitudinal direction) is as follows. Is set to That is, as shown in FIG. 4, when the vehicle V (floor panel 30 and cross member 10) is electrodeposited, the vehicle V enters the electrodeposition bath 70 from the front side. And the tank entrance angle A2 of this time and the inclination angle A1 of the 1st bead inclination part 44 are set to the same angle.

  As shown in FIG. 3, the second bead inclined portion 46 is disposed on the rear side with respect to the rear flange 18 in the cross member 10 and extends rearward from the rear end of the bead main body portion 42. . Specifically, as the second bead inclined portion 46 moves from the rear end of the bead main body portion 42 to the rear side so as to be substantially parallel to the first bead inclined portion 44 in a cross-sectional view seen from the vehicle width direction. It is inclined downward. The rear end of the second bead inclined portion 46 is connected to the floor panel 30.

  Further, as shown in FIG. 1, the air vent bead 40 includes a pair of bead side wall portions 48 that constitute both end portions in the width direction of the air vent bead 40 (in FIG. 1, only one bead side wall portion 48 is illustrated. Have). And the bead body part 42, the 1st bead inclination part 44, the 2nd bead inclination part 46, and the floor panel 30 are connected with the pair of bead side wall parts 48 in the vehicle width direction.

  Next, the slope part 50 of the floor panel 30 which is the principal part of this invention is demonstrated. The slope portion 50 constitutes a portion (a portion between the front side joint portion 32 and the first rear side joint portion 36 and the second rear side joint portion 38) that forms the closed cross section 24 in the floor panel 30. Further, a plurality of slope portions 50 are formed corresponding to the air vent beads 40 (two in this embodiment) and are arranged side by side in the vehicle width direction. Further, the slope portion 50 includes a first slope portion 52 that constitutes a vehicle width direction center portion of the slope portion 50 and a pair of second slope portions 54 and 56 that constitute both side portions of the slope portion 50 in the vehicle width direction. It is configured to include.

  As shown in FIG. 2B, the first slope portion 52 extends in the front-rear direction, and connects the front end of the first bead inclined portion 44 and the rear end of the front side joint portion 32 in the air bleeding bead 40. It is connected. That is, the first slope portion 52 extends from the front end of the first bead inclined portion 44 to the front side, and is linearly inclined downward toward the front side as viewed from the vehicle width direction. For this reason, the vertical position of the first slope portion 52 is set so as to gradually increase toward the air bleeding bead 40. A rear end of the first slope portion 52 (a boundary portion between the first slope portion 52 and the first bead inclined portion 44) extends linearly in the vehicle width direction in plan view.

  As shown in FIG. 1, the second slope portions 54 and 56 are formed in a substantially rectangular shape in plan view, and are disposed on the outer side in the vehicle width direction with respect to the first slope portion 52. In other words, the second slope portions 54 and 56 extend outward from the first slope portion 52 in the vehicle width direction and extend rearward from the front joint portion 32. Further, the second slope portions 54 and 56 are linearly inclined downward toward the outer side in the vehicle width direction when viewed from the rear side. Accordingly, in the floor panel 30, the front end of the first bead inclined portion 44 in the air vent bead 40 is set to the highest position in the vertical direction, and the vertical positions of the second slope portions 54 and 56 are set to the air vent bead 40. It is configured to gradually become higher toward. Specifically, in the cross-sectional view seen from the rear side, the slopes of the second slope portions 54, 56 are gradually changed so as to approach the horizontal as they go to the front side, and the front ends of the second slope portions 54, 56 are the vehicle width. Extends horizontally in the direction. In addition, the slope of the second slope portions 54 and 56 is gradually changed so as to approach the horizontal as it goes outward in the vehicle width direction in a cross-sectional view seen from the vehicle width direction, and the vehicle width direction of the second slope portions 54 and 56 The outer end extends horizontally in the front-rear direction. The rear ends of the second slope portions 54 and 56 extend linearly in the vehicle width direction in plan view and are connected to the rear end of the first slope portion 52. As a result, as shown in FIG. 2A, the rear end of the slope portion 50 is located more than the mating surface of the rear flange 18 of the cross member 10, the first rear joint portion 36, and the second rear joint portion 38. It is arranged on the upper side.

  Furthermore, the rear end of the second slope portion 54 is connected to the front end of the first rear side joining portion 36 by a first connection wall 58, and the first connection wall 58 is directed downward as viewed from the vehicle width direction. Is slightly inclined to the rear side. Further, the front / rear position of the rear end of the first connecting wall 58 and the front / rear position of the base end of the rear flange 18 are set to coincide with each other. That is, the front end of the first rear joint portion 36 is configured not to protrude forward relative to the rear flange 18.

  Similarly to the second slope portion 54, the second slope portion 56 is also connected to the second rear joint portion 38 by a second connection wall 59 (see FIG. 1). That is, the rear end of the second slope portion 56 is connected to the front end of the second rear side joining portion 38 by the second connecting wall 59, and the second connecting wall 59 is downward when viewed from the vehicle width direction. It is inclined slightly toward the rear as it goes. Further, the front-rear position of the rear end of the second connecting wall 59 and the front-rear position of the base end of the rear flange 18 are set to coincide with each other. That is, the front end of the second rear side joining portion 38 is configured not to protrude forward with respect to the rear flange 18.

  Next, the operation and effect of the present embodiment will be described.

  In the joint structure S of the skeleton member configured as described above, the floor panel 30 is disposed on the upper side of the cross member 10, and the floor panel 30 is joined to the front flange 20 and the rear flange 18 of the cross member 10. Yes. Further, an air vent bead 40 that is raised upward with respect to the rear flange 18 is formed at a portion of the floor panel 30 that faces the rear flange 18. Thus, an air vent hole 60 is formed by the air vent bead 40 and the rear flange 18, and the inside and the outside of the closed cross section 24 are communicated by the air vent hole 60.

  As shown in FIG. 4, when the electrodeposition coating is applied to the vehicle V (cross member 10 and floor panel 30), the vehicle V enters the electrodeposition tank 70 from the front side. Specifically, as shown in FIGS. 5A and 5B, when the vehicle V enters the electrodeposition tank 70, the cross member 10 and the floor panel 30 are connected to the rear flange 18 of the cross member 10. It enters the electrodeposition tank 70 from the side and is inclined with respect to the horizontal direction. That is, the cross member 10 and the floor panel 30 are inclined so that the air vent hole 60 is opened obliquely upward rearward with respect to the horizontal direction. Thereby, the air in the closed cross section 24 of the cross member 10 and the floor panel 30 moves toward the air vent hole 60 along the inner peripheral surface of the floor panel 30, and the outside of the closed cross section 24 from the air vent hole 60. Is discharged.

  Here, a portion forming the closed cross section 24 in the floor panel 30 is a slope portion 50, and the slope portion 50 is connected to the air vent bead 40. Since the air vent beads 40 are raised upward with respect to the rear flange 18 of the cross member 10, the slope portion 50 can be disposed above the rear flange 18. Specifically, the rear end portion of the slope portion 50 can be disposed on the upper side with respect to the mating surface of the rear flange 18, the first rear side joint portion 36, and the second rear side joint portion 38. For this reason, even if the adhesive 22 protrudes into the closed section 24 from the mating surface, the slope portion 50 (rear end portion) can be disposed on the upper side with respect to the protruding adhesive 22. Thereby, it is possible to suppress the air moving toward the air vent hole 60 along the slope portion 50 from being caught by the adhesive 22.

  More specifically, as indicated by an arrow B in FIGS. 5A and 5B, air in the closed cross section 24 is allowed to flow inside the rear wall 14 of the cross member 10 at the rear end portion of the closed cross section 24. Move upward along the circumference. Further, on the outer side in the vehicle width direction with respect to the air bleeding bead, the air moving upward along the inner peripheral surface of the rear wall 14 of the cross member 10 is moved to the first rear side joint portion 36 (second rear side joint portion 38). ) And the rear flange 18 and move toward the first connecting wall 58 (second connecting wall 59) (see FIG. 5A). And the said air moves toward the rear-end part of the slope part 50 along the internal peripheral surface of the 1st connection wall 58 (2nd connection wall 59). Furthermore, as indicated by an arrow C in FIG. 6, the air that has reached the rear end portion of the slope portion 50 moves in the vehicle width direction along the rear end portion of the slope portion 50 toward the air vent hole 60. . As a result, even when the adhesive 22 partially protrudes into the closed cross section 24, the air that moves toward the air vent hole 60 along the rear end portion of the slope portion 50 is caught by the protruding adhesive 22. Can be suppressed. In other words, it is possible to suppress the occurrence of air pockets (air pockets) when air in the closed cross section 24 is extracted from the air vent hole 60.

  In addition, the slope portion 50 is inclined downward as it goes from the air vent bead 40 toward the outside in the vehicle width direction as viewed from the rear side. For this reason, in the floor panel 30, the front end of the air bleeding bead 40 is set to the highest position. Thereby, the air in the closed cross-section 24 can be efficiently moved from the vehicle width direction outer side toward the air vent hole 60 along the inner peripheral surface of the slope portion 50. As described above, the air in the closed cross section 24 can be efficiently guided to the air vent hole 60 by the slope portion 50.

  Furthermore, the slope portion 50 is inclined downward as viewed from the vehicle width direction (in a side view of the vehicle) from the air bleeding bead 40 toward the front side. Therefore, the vertical positions of the first slope portion 52 and the second slope portions 54 and 56 are configured to gradually increase toward the air vent bead 40. Thereby, as shown by the arrow D in FIGS. 5 and 6, the air in the closed section 24 can be efficiently moved from the front side to the air vent hole 60 side along the inner peripheral surface of the slope portion 50. . Therefore, the air in the closed cross section 24 can be more efficiently guided to the air vent hole 60.

  A plurality of air vent beads 40 are formed on the floor panel 30. For this reason, the cross-sectional area of each air vent hole 60 can be made smaller as compared to the case where one air vent bead 40 is formed on the floor panel 30 with respect to the cross member 10. That is, the width dimension and height dimension of each air vent bead 40 (each air vent hole 60) can be set small. Thereby, the width dimension of the opening part of each air vent hole 60 can be made small by setting the width dimension of the air vent bead 40 small. Therefore, the application area of the sealer 62 can be narrowed. Moreover, since the length of the 1st rear side junction part 36 and the 2nd rear side junction part 38 in the vehicle width direction becomes long, the joining strength of the floor panel 30 and the cross member 10 can be made high. Moreover, the inclination angle with respect to the horizontal direction of the slope part 50 can be set small by making the height dimension of the air bleeding bead 40 small. Thereby, it can suppress that the floor panel 30 enlarges to an up-down direction.

  Furthermore, in the air vent bead 40, when viewed from the vehicle width direction, the inclination angle A <b> 1 of the first bead inclined portion 44 with respect to the horizontal direction (the vehicle front-rear direction) is the tank when the vehicle V enters the electrodeposition tank 70. It is set to be the same as the angle A2. For this reason, when the floor panel 30 and the cross member 10 enter the electrodeposition tank 70, the first bead inclined portion 44 constituting the inflow side of the air vent hole 60 is horizontally disposed (FIG. 5B). reference). Thereby, the air collected by the slope part 50 at the front-end part of the air vent bead 40 can be efficiently moved along the 1st bead inclination part 44 to the opening side (discharge side) of the air vent hole 60. FIG. Thereby, the air in the closed cross section 24 can be efficiently discharged from the air vent hole 60.

  Further, in the air vent bead 40, the bead main body 42 is disposed in parallel to the rear flange 18 on the upper side of the front end of the rear flange 18 of the cross member 10. For this reason, the separation distance H between the front end of the rear flange 18 and the bead body 42 can be set constant in the vehicle width direction. Thereby, the workability when applying the sealer 62 to the front end portion of the rear flange 18 can be improved, and the sealer 62 can be satisfactorily applied to the front end portion of the rear flange 18. In addition, it is possible to easily manage the separation distance H between the front end of the rear flange 18 and the bead main body 42.

  In the present embodiment, the air vent bead 40 is formed in a portion of the floor panel 30 that faces the rear flange 18 of the cross member 10 corresponding to the direction of entry of the vehicle V into the electrodeposition tank 70. However, the position of the air vent bead 40 may be changed in accordance with the tank entry direction of the vehicle V. For example, when the vehicle V enters the electrodeposition tank 70 from the rear side, the air vent bead 40 may be formed in a portion of the floor panel 30 facing the front flange 20 of the cross member 10. That is, in this case, the floor panel 30 may be reversed in the front-rear direction.

  Further, in the present embodiment, the slope portion 50 is inclined linearly downward as it goes from the air vent bead 40 to the front side when viewed from the vehicle width direction. However, the slope portion 50 is slightly viewed from the vehicle width direction. You may incline so that it may curve. Further, the slope portion 50 is linearly inclined downward as it goes from the air vent bead 40 toward the outside in the vehicle width direction when viewed from the rear side, but is inclined so that the slope portion 50 is slightly curved when viewed from the rear side. You may let them.

  In the present embodiment, the air vent bead 40 includes the bead body portion 42, the first bead inclined portion 44, and the second bead inclined portion 46. The form is not limited to this. For example, in the air vent bead 40, the bead main body portion 42 is omitted, and the rear end of the first bead inclined portion 44 is extended to the front end of the second bead inclined portion 46 so that the first bead inclined portion 44 and the second bead inclined portion are extended. You may comprise so that the part 46 may be connected. In this case, the cross-sectional area on the inflow side (closed cross section 24 side) of the air vent hole 60 can be increased. Thereby, the inflow amount of air from the closed section 24 to the air vent hole 60 can be increased. Therefore, the air discharge efficiency by the air vent hole 60 can be increased.

  In this embodiment, the opening of the air vent hole 60 is sealed by the sealer 62. However, the sealer 62 is continuously extended in the vehicle width direction, and the front end surface of the rear flange 18 is sealed by the sealer 62. May be.

  In the present embodiment, the joint structure S of the skeleton member is applied to the joint portion between the cross member 10 and the floor panel 30, but the joint between the other skeleton member constituting the vehicle V and the panel member. You may apply to a part.

10 Cross member (frame member)
18 Rear flange (flange)
20 Front flange (flange)
22 Adhesive 24 Closed section 30 Floor panel (panel member)
40 Air vent beads (bead part)
50 Slope part 60 Air vent hole S Structure of skeleton member joint

Claims (3)

A skeleton member that is formed in a long shape in which the vehicle width direction is the longitudinal direction and the vehicle longitudinal direction is the width direction, has an open cross-sectional shape opened to the upper side of the vehicle, and flanges are formed at both ends in the width direction; ,
A panel member that is disposed on the vehicle upper side of the skeleton member with the vehicle vertical direction being a plate thickness direction, and is joined to the flange via an adhesive to form a closed section with the skeleton member;
An air vent hole formed in a portion of the panel member facing the flange on one side in the width direction of the skeleton member and projecting upward from the flange relative to the flange to communicate the inside and outside of the closed section. Forming a bead portion with the flange;
The panel member constitutes a portion forming the closed cross section, is connected to the bead portion, and is inclined to the vehicle lower side from the bead portion toward the outside in the vehicle width direction when viewed from the width direction of the skeleton member. A slope section;
The joint part structure of the skeleton member provided with this.   The joint structure of a skeleton member according to claim 1, wherein the slope portion is inclined downward from the bead portion toward the other side in the width direction of the skeleton member as viewed from the vehicle width direction. The joint structure of the skeleton member according to claim 1 or 2, wherein a plurality of the bead portions are formed and arranged side by side in the vehicle width direction.