JP2020083126A - Vehicle floor part structure - Google Patents

Abstract

To improve sealability in a portion that is hard to be welded in a connection portion of a frame.SOLUTION: In a floor part structure, an end surface of a cross frame 33 is connected to a side surface 302 of a front and rear frame 30 in a floor part of a vehicle. The front and rear frame 30 includes a floor flange part 305 in an upper end of the side surface 302. The cross frame 33 includes a vertical wall part 331 extending in a vehicle width direction and a ceiling part 332 coupled to an upper end of the vertical wall part 331. An end surface of the vertical wall part 331 of the cross frame 33 is provided with an inner flange part 335 projecting along an end surface of the ceiling part 332 and connecting the ceiling part 332 and the vertical wall part 331, and an outer flange part 333 extending vertically in a lower side of the inner flange part 335. The outer flange part 333 and the inner flange part 335 are joined to the side surface 302 of the front and rear frame 30 in a lower side of the floor flange part 305.SELECTED DRAWING: Figure 5

Description

The present invention provides a floor structure of a vehicle including front and rear frames extending in a vehicle front-rear direction and a cross frame extending in a vehicle width direction on a floor of the vehicle, and an end surface of the cross frame being connected to a side surface of the front and rear frames. Regarding

Japanese Patent Application Laid-Open No. 2004-242242 discloses a conventional technology relating to the floor structure of a vehicle. The floor structure of Patent Document 1 is a step structure in a door opening of a vehicle, as shown in FIG. A floor side member 102 extending in the vehicle front-rear direction is provided at an end portion of the vehicle floor in the width direction of the vehicle compartment. An end surface of a front outrigger 104 and a rear outrigger 105 extending in the vehicle width direction before and after the door opening is connected to the vehicle width direction outer side surface (left side surface 102w in FIG. 11) of the floor side member 102. .. Then, the step 100 is arranged in a range surrounded by the floor side member 102 and the front and rear outriggers 104, 105. The area excluding the step 100 is covered with a floor panel F from above.

As shown in FIG. 12, the outer surface of the front outrigger 104 is formed with an outer flange portion 104z extending vertically along the vertical wall portion 104w of the front outrigger 104. Then, the outer flange portion 104z of the front outrigger 104 is spot welded to the left side surface 102w of the floor side member 102 below the flange portion 102f, for example. As a result, the end surface of the front outrigger 104 is connected to the left side surface 102w of the floor side member 102. Then, as shown in FIG. 14, a body sealer B is applied to the connection portion between the end surface of the front outrigger 104 and the left side surface 102w of the floor side member 102. The connection between the end surface of the rear outrigger 105 and the left side surface 102w of the floor side member 102 is performed in the same manner.

JP-A-6-278659

When spot welding the outer flange portion 104z of the front outrigger 104 to the left side surface 102w of the floor side member 102, spot welding is difficult at a position near the flange portion 102f of the floor side member 102 due to the setting of the electrode of the welding machine. become. However, if the portion where welding is difficult, that is, the upper end of the outer flange portion 104z of the front outrigger 104 is kept in contact with the left side surface 102w of the floor side member 102, abnormal noise is generated due to vibration or the like during traveling of the vehicle. ..

Therefore, generally, as shown in FIGS. 12 to 14, a notch 104c is formed in the upper end of the vertical wall portion 104w of the front outrigger 104, and the upper end of the outer flange portion 104z is located on the left side of the floor side member 102. The surface 102w is not touched. However, in the configuration in which the notch 104c is formed at the upper end of the vertical wall portion 104w of the front outrigger 104, after applying the body sealer B, caulking putty P (seal material) is filled in the hole portion of the notch 104c to take a waterproof measure. There is a need. However, in the method of filling the sealing material in the hole portion, the workability is poor and the sealing stability is low.

The present invention has been made in order to solve the above problems, and the problem to be solved by the present invention is to improve the sealing property after taking measures against abnormal noise in difficult-to-weld portions in the connection portion of the frame. It is to let.

The problems described above are solved by the inventions of the claims. A first aspect of the present invention is a floor of a vehicle, comprising a front-rear frame extending in a vehicle front-rear direction and a cross frame extending in a vehicle width direction in a floor portion of the vehicle, and an end surface of the cross frame being connected to a side surface of the front-rear frame. In the partial structure, the front and rear frames are provided with floor flange portions that are parallel to the floor surface at the upper ends of the side surfaces of the front and rear frames, and the intersecting frame is a vertical wall portion extending in the vehicle width direction and its vertical wall. An inner flange connecting the ceiling part and the vertical wall part, the end part of the vertical wall part of the cross frame protruding along the end face of the ceiling part, and the ceiling part connected to the upper end of the part. And an outer flange portion projecting in a direction opposite to the inner flange portion and extending in the longitudinal direction below the inner flange portion, and the outer flange portion and the inner flange portion of the cross frame are the front and rear portions. The bottom side of the floor flange is joined to the side surface of the frame.

According to the present invention, the end surface of the vertical wall portion of the cross frame is provided with the inner flange portion projecting along the end surface of the ceiling portion and connecting the ceiling portion and the vertical wall portion. That is, since the end portions of the corner portions of the vertical wall portion and the ceiling portion of the intersecting frame are closed by the inner flange portion, there is no hole or the like in this portion. The outer flange portion and the inner flange portion of the cross frame are joined to the side surfaces of the front and rear frames below the floor flange portions of the front and rear frames. Here, since the outer flange portion of the cross frame is located below the inner flange portion, it can be separated from the floor flange portions of the front and rear frames, and spot welding or the like can be performed with the side surfaces of the front and rear frames. On the other hand, the inner flange portion of the cross frame is close to the floor flange portions of the front and rear frames, and spot welding with the side faces of the front and rear frames is difficult, but joining with an adhesive or the like is possible. Therefore, by joining the inner flange portion of the cross frame and the side faces of the front and rear frames with an adhesive or the like, it is possible to improve the sealing performance against water from under the vehicle floor while taking measures against noise.

According to the second invention, the upper surface of the ceiling portion of the cross frame is joined to the lower surfaces of the floor flange portions of the front and rear frames. For this reason, the sealing property of the difficult welding spot is further improved.

According to the third invention, a seal member is provided between the inner flange portion of the cross frame and the side surfaces of the front and rear frames, and between the upper surface of the ceiling portion of the cross frame and the lower surface of the floor flange portion of the front and rear frames. ..

According to the fourth aspect of the invention, the sealing member is foamed by heating, and the space between the inner flange portion of the cross frame and the side surfaces of the front and rear frames, and between the upper surface of the ceiling portion of the cross frame and the lower surface of the floor flange portion of the front and rear frames is increased. It is configured so that it can be adhered and sealed. Therefore, it is possible to efficiently perform the joining and sealing of the difficult-to-weld portion.

According to the fifth aspect of the present invention, step panels constituting steps of the door opening are overlapped and joined to the vertical wall portion, the outer flange portion of the cross frame, and the side surfaces of the front and rear frames.

According to the present invention, it is possible to improve the sealing property while taking measures against abnormal noise in the difficult-to-weld portion of the connection portion of the frame.

1 is a schematic perspective view of a vehicle including a step structure according to a first embodiment of the present invention. It is an outline perspective view of a step portion of a vehicle. It is a schematic plan view showing the step structure of a vehicle, and its surrounding structure. It is a schematic perspective view showing the state which looked up at the said step structure from diagonally left back lower side. It is a schematic perspective view which looked at the said step structure from diagonally left back upper direction. It is a perspective view showing the front end surface of the outrigger which comprises the said step structure. It is the perspective view which looked at the tip side of the above-mentioned outrigger from the vehicle inside (right side) upper part. FIG. 8 is a plan sectional view taken along the line VIII in FIG. 3 and taken along the line VIII-VIII in FIG. 5. 9 is a sectional view taken along the line IX-IX in FIG. 8. FIG. 9 is a sectional view taken along the line X-X in FIG. 8. It is a disassembled schematic perspective view showing the whole conventional step structure. It is an expansion perspective view of the XII arrow part of FIG. It is a XIII-XIII arrow line view of FIG. FIG. 14 is a sectional view taken along line XIV-XIV of FIG. 13.

[Embodiment 1]
Hereinafter, the floor structure of the vehicle according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 10. The floor structure of the vehicle according to the present embodiment is a floor structure of a step portion provided in a door opening of the vehicle (hereinafter referred to as a step structure). Here, the front-rear, left-right, and top-bottom shown in the drawing correspond to the front-rear, left-right, and top-bottom of the vehicle including the step structure according to the present embodiment.

<Overview of vehicle body 10>
First, the outline of the vehicle body 10 will be briefly described. As shown in FIG. 1, the vehicle body 10 is provided with a front door opening 11 corresponding to a front seat such as a driver's seat and a passenger seat, and a rear door opening 12 corresponding to a rear seat. A center pillar 13, which is a column, is provided between the front door opening 11 and the rear door opening 12. As shown in FIGS. 1 to 3, a rear step 20b is provided inside the rear door opening 12 at a position lower than the floor panel F by one step. Similarly, inside the front door opening 11, a front step 20f is provided as shown in FIG. The front door opening 11 is configured to be openable/closable by a front door 15 which is rotatable around a door hinge (not shown). Further, the rear door opening 12 is configured to be opened and closed by a slide door 16 that is slidable in the vehicle front-rear direction.

As shown in FIGS. 3 to 5 and the like, a pair of left and right floor side members 30 extending in the vehicle front-rear direction are provided on the floor of the vehicle compartment. In the drawings, only the floor side member 30 on the left side of the vehicle is displayed. On the side surface (left side surface in FIG. 3 etc.) of the floor side member 30, a front side outrigger 33 extending outward in the vehicle width direction at the front side of the rear door opening 12, and a rear side of the rear door opening 12 at the vehicle width direction outside. A rear outrigger (not shown) on the extending side is connected. That is, the vehicle width direction inner end surface (the right end surface in FIG. 3) of the front outrigger 33 and the right end surface of the rear outrigger are connected to the left side surface of the floor side member 30. The rear step 20b is installed in a range surrounded by the floor side member 30 and the front and rear outriggers 33.

Here, the vehicle width direction outer end surface of the front outrigger 33 (the left end surface in FIG. 3) is connected to the lower end of the center pillar 13, and the left end surface of the rear outrigger (not shown) is a rear pillar (not shown). Is connected to the lower end of. A rocker 34 extending in the vehicle front-rear direction is provided between the lower end of the center pillar 13 and the lower end of the rear pillar. The area excluding the rear step 20b, that is, the floor side member 30, the front and rear outriggers 33, and the like are covered by the floor panel F.

<Outline of step structure of rear step 20b>
The rear step 20b includes a step panel 23 and a resin step surface plate 25 (see FIG. 2) that covers the step panel 23. As shown in FIGS. 3 and 4, the step panel 23 of the rear step 20b is supported from the surroundings by the floor side member 30 and the front and rear outriggers 33. The step panel 23 is supported by a rocker 34 from below.

<About the floor side member 30 that constitutes the step structure>
As shown in FIG. 5, the floor side member 30 that supports the step panel 23 of the rear step 20b is formed in a groove shape having a substantially U-shaped cross section by the left and right side wall portions 302 and the floor plate portion 303, and the left and right side wall portions are formed. A flange portion 305 bent outward in the width direction is provided at the upper end position of the portion 302. The flange portion 305 of the floor side member 30 is a portion to which the floor panel F is connected, and is formed parallel to the floor surface of the passenger compartment.

<Regarding the front outrigger 33 that constitutes the step structure>
As shown in FIGS. 4 to 7, the outrigger 33 includes an outrigger body portion 33m that connects the floor side member 30 and the center pillar 13, and an expansion portion 33k for providing an inclination to the floor portion on the side of the center pillar 13 (see FIG. 7)). Further, the outrigger body 33m is formed in a tunnel shape having a substantially inverted U-shaped cross section by combining the rear step side panel 330 and the front step side panel 340 from the front and rear.

The rear step side panel 330 of the outrigger body 33m is, as shown in FIG. 7 and the like, bent to a vertical wall portion 331 extending in the vehicle width direction and forward at the upper end position of the vertical wall portion 331 until substantially horizontal. The ceiling plate portion 332 and the ceiling plate portion 332 are formed into a substantially inverted L-shaped cross section. Then, as shown in FIG. 6 and the like, an upper portion of the right end surface of the vertical wall portion 331 of the rear step side panel 330 (an upper end portion of the floor side member 30 side) extends forward along the right end surface of the ceiling plate portion 332. An inner flange portion 335 that connects the ceiling plate portion 332 and the vertical wall portion 331 is formed. Further, on the right end surface of the vertical wall portion 331 of the rear step side panel 330, an outer flange portion 333 which is below the inner flange portion 335 and which projects in the opposite direction (rearward) from the inner flange portion 335 and extends in the vertical direction is formed. Has been formed.

As shown in FIG. 7 and the like, the front step side panel 340 of the outrigger main body portion 33m is bent to a vertical wall portion 341 extending in the vehicle width direction and a rear end at the upper end position of the vertical wall portion 341 until being substantially horizontal. The ceiling plate portion 342 and the ceiling plate portion 342 are formed into a substantially inverted L-shaped cross section. Then, the ceiling plate portion 342 of the front step side panel 340 is overlapped and joined to the ceiling plate portion 332 of the rear step side panel 330 from below. Further, the ceiling plate portion 342 of the front step side panel 340 is provided with an inner flange portion 345 that is overlapped from the inside (left side) with the inner flange portion 335 of the rear step side panel 330 at the rear end position of the right end surface. There is. Further, on the right end surface of the vertical wall portion 341 of the front step side panel 340, an outer flange portion 343 is formed which projects forward and extends in the vertical direction.

<Regarding the step panel 23 of the rear step 20b>
As shown in FIG. 4 and the like, the step panel 23 of the rear step 20b has a substantially vertical cross section by a step vertical wall portion 23w connected to the side wall portion 302 of the floor side member 30 and a horizontal step main body portion 23b on which the foot is placed. It is L-shaped. Then, step flange portions 23f for connecting the step panel 23 to the front and rear outriggers 33 are formed at front and rear edges of the step vertical wall portion 23w and the step body portion 23b.

<Assembly of rear step 20b>
When assembling the rear step 20b, the right end surface of the outrigger 33 is connected to the side surface of the side wall portion 302 of the floor side member 30, as shown in FIG. At this time, in the connection between the side surface of the floor side member 30 and the right end surface of the outrigger 33, spot welding becomes difficult, and the inner flange portions 335 and 345 of the outrigger 33 and the sealing member 40 ( (See FIG. 7). Here, the seal member 40 is a member that foams by heat during baking coating and acts as an adhesive and a sealant. Next, the outrigger 33 is positioned relative to the floor side member 30. As a result, as shown in FIG. 8, the outer flange portion 333 abuts on the side wall portion 302 (side surface) of the floor side member 30. Further, as shown in FIG. 9, the inner flange portions 335 and 345 of the outrigger 33 and the upper surface of the ceiling plate portion 332 are provided on the side wall portion 302 (side surface) of the floor side member 30 and the lower surface of the flange portion 305 with the seal member 40 interposed therebetween. Abut. In this state, the outer flange portion 333 of the outrigger 33 is connected to the side surface of the side wall portion 302 of the floor side member 30 by spot welding or the like.

Next, as shown in FIG. 10 and the like, the step vertical wall portion 23w of the step panel 23 is overlapped with the outer flange portion 333 of the outrigger 33 and the side wall portion 302 of the floor side member 30, and the vertical wall portion of the outrigger 33 is overlapped. The step flange portion 23f of the step panel 23 is overlapped with the step 331. Then, the step vertical wall portion 23w and the step flange portion 23f of the step panel 23 are connected to the side wall portion 302 of the floor side member 30 and the vertical wall portion 331 of the outrigger 33 by spot welding or the like. After the step panel 23 is attached, the floor side member 30, the outriggers 33, etc. are covered by the floor panel F.

Next, as shown in FIGS. 4 and 10, etc., the body sealer B is applied to the matching portion of the step vertical wall portion 23w of the step panel 23 and the side wall portion 302 (side surface) of the floor side member 30. Further, the body sealer B is applied to a portion where the step flange portion 23f of the step panel 23 and the vertical wall portion 331 of the outrigger 33 are joined together. Further, as shown in FIG. 10, the body sealer B is applied to the outer side (rear side) of the seal member 40 at the mating portion of the inner flange portion 335 of the outrigger 33 and the side wall portion 302 (side surface) of the floor side member 30. To be done. Then, when the seal member 40 is foamed by the heat during baking coating in the subsequent coating process, the inner flange portions 335 and 345 of the outrigger 33 and the upper surface of the ceiling plate portion 332 form the side wall portion 302 (side surface) of the floor side member 30. It is bonded to the lower surface of the flange portion 305, and this portion is sealed. That is, the inner flange portion 335 of the outrigger 33 and the side wall portion 302 (side surface) of the floor side member 30 are doubly sealed by the seal member 40 and the body sealer B, so that the sealing performance of this portion is improved. The rear outrigger and the side wall portion 302 of the floor side member 30 are also connected in a direction corresponding to the front outrigger 33.

<Correspondence between the term of the step structure according to the present embodiment and the term of the present invention>
The above-mentioned floor side member 30 corresponds to the front and rear frame of the present invention, and the flange portion 305 of the floor side member 30 corresponds to the floor flange portion of the front and rear frame of the present invention. Further, the outrigger 33 corresponds to the cross frame of the present invention. The ceiling plate portions 332 and 342 of the outrigger 33 correspond to the ceiling portion of the cross frame of the present invention.

<Advantages of the step structure according to the present embodiment>
According to the step structure according to the present embodiment, the end wall of the vertical wall portion 331 of the outrigger 33 (intersecting frame) projects along the end surface of the ceiling plate portions 332 and 342, and the ceiling plate portions 332 and 342 and the vertical wall portion 331. An inner flange portion 335 is provided to connect with. That is, since the corner end faces of the vertical wall portion 331 and the ceiling plate portion 332 of the outrigger 33 are closed by the inner flange portion 335, there is no hole or the like in this portion. The outer flange portion 333 and the inner flange portion 335 of the outrigger 33 are joined to the side surface of the floor side member 30 below the flange portion 305 (floor flange portion). Here, although it is difficult to perform spot welding or the like on the inner flange portion 335 of the outrigger 33, joining by the seal member 40 is possible. Therefore, by joining the inner flange portion 335 of the outrigger 33 and the side surface of the floor side member 30 with the seal member 40, it is possible to improve the sealing performance against water from under the vehicle floor while taking measures against noise. .

[Modification]
The present invention is not limited to the above embodiment, and modifications can be made without departing from the present invention. For example, in the step structure according to the present embodiment, the connection structure between the floor side member 30 and the outrigger 33 arranged so as to surround the step panel 23 has been illustrated. However, for example, the present invention can be applied to a connection structure between the floor side member 30 and the cross member.

20b: rear step 23: step panel 30: floor side member (front and rear frames)
302... Side wall (side surface)
305...Flange part (floor flange part)
33...Outrigger (crossing frame)
331... Vertical wall part 332... Ceiling plate part (ceiling part)
342... Ceiling plate part (ceiling part)
333... Outer flange portion 335... Inner flange portion 345... Inner flange portion F... Floor panel 40... Sealing member

Claims (5)

A floor structure of a vehicle, comprising: a front and rear frame extending in a vehicle front-rear direction and a cross frame extending in a vehicle width direction on a floor of the vehicle, wherein an end surface of the cross frame is connected to a side surface of the front and rear frame,
The front and rear frames are provided with floor flange portions parallel to the floor surface at the upper ends of the side surfaces of the front and rear frames,
The cross frame includes a vertical wall portion extending in the vehicle width direction, and a ceiling portion connected to an upper end of the vertical wall portion,
An inner flange portion that projects along the end surface of the ceiling portion and connects the ceiling portion and the vertical wall portion to the end surface of the vertical wall portion of the intersecting frame, and the inner flange portion below the inner flange portion. Is provided with an outer flange portion that projects in the opposite direction and extends in the vertical direction,
The floor structure of a vehicle in which an outer flange portion and an inner flange portion of the cross frame are joined to the side surfaces of the front and rear frames below the floor flange portion. The floor structure of the vehicle according to claim 1,
The floor structure of a vehicle in which an upper surface of a ceiling portion of the cross frame is joined to a lower surface of a floor flange portion of the front and rear frames. The floor structure for a vehicle according to claim 2,
A vehicle floor structure in which a seal member is provided between an inner flange portion of the cross frame and side surfaces of the front and rear frames, and between an upper surface of a ceiling portion of the cross frame and a lower surface of a floor flange portion of the front and rear frames. .. The floor structure of a vehicle according to claim 3,
The sealing member is foamed by heating and adheres between the inner flange portion of the cross frame and the side surfaces of the front and rear frames, and between the upper surface of the ceiling portion of the cross frame and the lower surface of the floor flange portions of the front and rear frames to form a seal. The floor structure of the vehicle that is configured to be able to. A floor structure for a vehicle according to any one of claims 1 to 3,
A floor structure of a vehicle in which a step panel constituting a step of a door opening is overlapped and joined to a vertical wall portion, an outer flange portion of the cross frame, and side surfaces of the front and rear frames.

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