JP2009096345A - Vehicle floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle floor structure capable of easily removing excessive electrodeposition liquid during the electrodeposition while ensuring the rigidity of a floor panel. <P>SOLUTION: A bead 20 formed on a bottom surface 12A of a recess of a floor panel is formed of three surfaces of a first inclined surface 20A inclined so that a vehicle body rear side is lowered from a vehicle body front side (the side of an arrow FR), a second inclined surface 20B inclined so that a vehicle body rear side is raised, and a third inclined surface 20C in which the vehicle body rear side is lowered when the vehicle body is horizontal. When the bead is inclined so that the vehicle body rear side is lowered, the bead 20 is further inclined than when the vehicle body is horizontal so that the vehicle body rear side of the first inclined surface 20A is lowered, the second inclined surface 20B is horizontal, and the third inclined surface 20C is further inclined than when the vehicle body is horizontal so that the vehicle body rear side is lowered. Thus, electrodeposition liquid deposited on a floor upper surface is allowed to flow to the lower side in the inclining direction without stopping by the bead part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle floor structure, and more particularly to a vehicle floor structure in which beads are formed on a floor panel.

A recess for storing a spare tire is formed in the floor panel of the automobile body. In order to improve rigidity, the recess has a convex cross section as shown in FIG. A plurality of beads 100 having a shape or beads 102 having a concave cross-sectional shape as shown in FIG. 8A are press-formed (see Patent Documents 1 and 2).
In addition, the car body is electrodeposited to prevent rust, and after the electrodeposition coating liquid is applied, the car body is tilted to remove excess electrodeposition coating liquid from the car body. When the convex bead 100 and the concave bead 102 are formed, the electrodeposition coating liquid 104 does not flow out from the bead portion and accumulates as shown in FIGS. 7B and 8B. Therefore, for example, as shown in FIG. 9A, an ED hole 110 for removing the electrodeposition coating liquid is provided in the recess 108 of the floor panel 106, and the electrodeposition coating liquid is drawn from the ED hole 110. I am doing so. In addition, although the code | symbol 112 is a reference | standard hole used for positioning etc. in a figure, an electrodeposition coating liquid can also be extracted from here.
Japanese Patent Laid-Open No. 8-80877 JP 2007-99093 A

  By the way, since it is necessary to attach a plug hole cover to the ED punching hole 110, in order to improve the rigidity of the floor panel 106, as shown in FIG. Since the number of 110 increases and the required plug hole cover also increases, the number of assembly steps, the number of parts, etc. increase, leading to an increase in cost.

  Therefore, it is necessary to reduce the number of ED punch holes 110 as much as possible in order to reduce costs.

  Conventionally, floor structures have been studied in which the number of beads 100 is reduced as shown in FIG. 9B or the beads 100 are cut halfway as shown in FIG. 9C. The floor structure leads to an increase in vibration level due to a decrease in floor bottom rigidity, which is contrary to NV performance.

  The present invention has been made to solve the above problems, and an object thereof is to provide a vehicle floor structure that can easily remove excess electrodeposition coating liquid during electrodeposition coating while ensuring the rigidity of the floor panel. And

  In order to achieve the above object, the invention according to claim 1 is a vehicle floor structure having a floor panel on which reinforcing beads are formed, wherein the vehicle is inclined at an angle θ in a predetermined direction. The bead having an upper surface formed only from at least one of a part that becomes horizontal when the floor panel is viewed in a cross section along the inclination direction and a part that is inclined in the same direction as the inclination direction of the floor panel. It is characterized by that.

  Next, the operation of the floor structure of the vehicle body according to claim 1 will be described.

  In the floor structure of the vehicle body according to claim 1, when the vehicle is inclined at an angle θ in a predetermined direction, the bead is horizontal when viewed in a cross section along the inclination direction, and the inclination direction of the floor panel Since the upper surface is formed only from at least one of the parts inclined in the same direction as the electrodeposition, the electrodeposition coating liquid adhering to the upper surface of the floor is allowed to flow downward in the inclination direction without accumulating in the beads during electrodeposition coating. I can do it.

  According to a second aspect of the present invention, in the vehicle floor structure according to the first aspect, when the floor panel is viewed in a cross section along a tilt direction when the vehicle is tilted, the bead From the first inclined surface arranged at the uppermost inclination when the angle θ is inclined in a predetermined direction, from the second inclined surface arranged at an inclination lower side than the first inclined surface, from the second inclined surface The first inclined surface when the floor panel is viewed in a cross section along the inclination direction by inclining the vehicle by an angle θ in a predetermined direction. The third inclined surface is inclined in the same direction as the inclination direction of the vehicle body, and the second inclined surface is inclined horizontally or in the same direction as the inclination direction of the vehicle body.

  Next, an operation of the vehicle body floor structure according to claim 2 will be described.

  In the floor structure of the vehicle body according to claim 2, when the vehicle body is inclined, the first inclined surface and the third inclined surface of the bead are inclined in the same direction as the inclination direction of the vehicle body, and the second inclined surface is horizontal or the vehicle body. Therefore, the electrodeposition coating liquid adhering to the upper surface of the floor during electrodeposition coating can flow downward in the tilt direction without accumulating in the beads.

  According to a third aspect of the present invention, in the vehicle floor structure according to the first aspect, when the floor panel is viewed in a cross section along a tilt direction when the vehicle is tilted, the bead From the first inclined surface arranged at the uppermost inclination when the angle θ is inclined in a predetermined direction, from the second inclined surface arranged at an inclination lower side than the first inclined surface, from the second inclined surface Also includes a third inclined surface disposed on the lower side of the inclination and a fourth inclined surface disposed on the lower side of the inclination with respect to the third inclined surface, and the vehicle is inclined by tilting the vehicle at an angle θ in a predetermined direction. When the floor panel is viewed in a cross section along the direction, the first inclined surface and the third inclined surface are inclined in the same direction as the inclination direction of the vehicle body, and the second inclined surface and the fourth inclined surface are It is inclined horizontally or in the same direction as the inclination of the vehicle body. ing.

  Next, operation of the vehicle body floor structure according to claim 3 will be described.

  In the vehicle body floor structure according to claim 3, when the vehicle body is inclined, the first inclined surface and the third inclined surface are inclined in the same direction as the inclination direction of the vehicle body, and the second inclined surface and the fourth inclined surface are inclined. Since the surface is inclined horizontally or in the same direction as the inclination direction of the vehicle body, the electrodeposition coating liquid adhering to the upper surface of the floor at the time of electrodeposition coating can flow downward in the inclination direction without accumulating in the bead portion.

  In addition, by forming the bead with the first to fourth inclined surfaces as described above, the floor upper surface can be formed at a smaller inclination angle than when the beads are formed with the first to third inclined surfaces (configuration of claim 2). It is possible to flow the electrodeposition coating liquid adhering to the bottom of the tilt direction without accumulating in the bead.

  According to a fourth aspect of the present invention, in the vehicle floor structure according to any one of the first to third aspects, the floor panel penetrates downward in a tilt direction when the vehicle body is tilted. It is characterized in that a hole is formed.

  Next, the operation of the vehicle body floor structure according to claim 4 will be described.

  By forming a through hole in the floor panel on the lower side in the inclination direction when the vehicle body is inclined, the electrodeposition coating liquid adhering to the upper surface of the floor can be discharged through the through hole.

  For example, when a recess is formed in the floor panel and a bead is formed in the recess, the electrodeposition coating liquid cannot flow out from the end of the floor panel, and the electrodeposition coating liquid accumulates in the recess. Therefore, in such a case, if a through hole is formed in the bottom surface of the recess, excess electrodeposition coating liquid in the recess can be drained through the through hole.

  As described above, according to the vehicle floor structure according to any one of claims 1 to 4, the excess electrodeposition coating liquid after electrodeposition coating is removed while ensuring the rigidity of the floor panel by the cross-sectional shape of the bead. There is an effect that it becomes easy to do.

  According to the vehicle floor structure according to claim 2, the electrodeposition coating liquid adhering to the floor upper surface through the first inclined surface, the second inclined surface, and the third inclined surface is inclined without accumulating in the bead portion. Can flow downward in the direction.

  According to the vehicle floor structure of the third aspect, the electrodeposition coating liquid adhering to the upper surface of the floor via the first inclined surface, the second inclined surface, the third inclined surface, and the fourth inclined surface is divided into beads. It is possible to flow downward in the tilt direction without accumulating, and compared with the case of only the first inclined surface, the second inclined surface, and the third inclined surface, the electricity attached to the upper surface of the floor with a small inclination angle. The coating liquid can be poured downward in the tilt direction.

  According to the vehicle floor structure of the fourth aspect, when a bead is formed in the recess, it is easy to drain the excess electrodeposition coating liquid in the recess.

[First Embodiment]
A vehicle body floor structure according to a first embodiment of the present invention will be described below with reference to FIGS. In the drawing, the arrow FR indicates the front of the vehicle body, the arrow UP indicates the upper side of the vehicle body, the arrow L indicates the left side direction of the vehicle body, and the arrow R indicates the right side direction of the vehicle.

  FIG. 1 is a perspective view of the rear side of a vehicle body 4 of an automobile, and a spare tire 8 is accommodated in a trunk room 6.

  FIG. 2 is a perspective view of the floor panel 10 on the rear side of the vehicle body 4.

  The floor panel 10 is a panel member that constitutes a floor surface at the rear of the vehicle body, and is a panel member in which a recess 12 for housing the spare tire 8 is press-molded at the center in the vehicle width direction. It is joined on the member.

  The recess 12 of the floor panel 10 shown in FIG. 2 is open on the rear side of the vehicle body, but a lower back panel (not shown) is disposed on the rear side of the vehicle body of the floor panel 10. An opening portion on the rear side of the vehicle body 12 is closed by a lower back panel (not shown).

  The concave portion 12 is press-molded with a circular convex portion 14 that is convex upward in the center of the bottom surface 12 </ b> A and is circular in plan view, and further, beads 16 to 16 that extend radially around the circular convex portion 14. 30 is press-molded. When the vehicle body 4 is disposed horizontally, the floor panel 10 is also horizontal, and the bottom surface 12A of the recess 12 is also horizontal.

  Here, the bead 16 that extends on the center line in the vehicle width direction of the recess 12 and extends from the circular convex portion 14 toward the front of the vehicle body, and the bead 24 that extends from the circular convex portion 14 toward the rear of the vehicle body are the other beads 18, 20. , 22, 26, 28, and 30 have different cross-sectional shapes.

  First, the bead 16 and the bead 24 have a trapezoidal cross-sectional shape that is convex upward (see, for example, FIG. 7A).

The beads 18, 20, 22 on the right side of the vehicle body and the beads 26, 28, 30 on the left side of the vehicle body have different cross-sectional shapes.
(Bead on the right side of the body in the recess)
FIG. 3A shows a cross section (cross-sectional view taken along the line 3A-3A in FIG. 2) of the bead 20 on the bottom surface 12A of the recess 12 when the vehicle body 4 is horizontally disposed. As shown in FIG. 3 (A), the bead 20 is formed from three surfaces of a first inclined surface 20A, a second inclined surface 20B, and a third inclined surface 20C from the vehicle body front side (arrow FR direction side). Yes.

  The first inclined surface 20A is inclined so that the rear side of the vehicle body is lower than the bottom surface 12A, the second inclined surface 20B is inclined so that the rear side of the vehicle body is raised, and the third inclined surface 20C is a flat surface of the bottom surface 12A. Inclined to connect to the part.

As shown in FIG. 3 (A), when viewed in cross-section along the longitudinal direction of the vehicle, in this embodiment, the inclination angle theta ₁ with respect to the bottom surface 12A of the second inclined surface 20B is 20 °.

  In addition, the bead 20 is made into the same cross-sectional shape over the full length to the edge part of the radial direction outer side. By setting the cross-sectional shape of the bead 20 in this way, the cross-sectional secondary moment is increased and a reinforcing effect is obtained.

Therefore, as shown in FIG. 3B, when the vehicle body 4 is inclined 20 ° so that the rear side is lowered (θ ₂ = 20 ° in the figure), the bead 20 on the bottom surface 12A has the first inclined surface 20A located on the rear side of the vehicle body. 3A, the second inclined surface 20B is horizontal, and the third inclined surface 20C is inclined more greatly than in FIG. 3A so that the rear side of the vehicle body is lowered. It will be.

  The other beads arranged on the right side of the vehicle body, that is, the beads 18 and 22 also have the same cross-sectional shape as the bead 20, and are formed in the same cross-sectional shape over the entire length to the radially outer end. Yes.

As shown in FIG. 2, the bottom surface 12A of the recess 12 has a first reference hole used for positioning or the like on the right side in the vehicle width direction of the bead 16 and the bead 24 and in the vicinity of the corner on the rear side of the vehicle body. 32 is formed.
(Bead on left side of recessed body)
FIG. 4A shows a cross section (cross-sectional view taken along the line 4A-4A in FIG. 2) of the bead 28 in the bottom surface 12A of the recess 12 when the vehicle body 4 is horizontally disposed. As shown in FIG. 4A, the bead 28 is formed from three surfaces of the first inclined surface 28A, the second inclined surface 28B, and the third inclined surface 28C from the rear side of the vehicle body.

  The first inclined surface 28A is inclined so that the front side of the vehicle body is lower than the bottom surface 12A, the second inclined surface 28B is inclined so that the front side of the vehicle body is raised, and the third inclined surface 28C is connected to the bottom surface 12A with the front side of the vehicle body being lowered. Inclined to be.

As shown in FIG. 4 (A), when viewed in cross-section along the longitudinal direction of the vehicle, in this embodiment, the inclination angle theta ₁ with respect to the bottom surface 12A of the second inclined surface 28B is 20 °.

  The bead 28 has the same cross-sectional shape over the entire length up to the radially outer end.

Therefore, as shown in FIG. 4B, when the vehicle body 4 is tilted by 20 ° so that the front side is lowered (θ ₂ = 20 ° in the figure), the bead 28 on the bottom surface 12A has the first inclined surface 28A. 4A is inclined so that the front side is lowered, the second inclined surface 28B is horizontal, and the third inclined surface 28C is inclined more than that in FIG. 4A so that the front side of the vehicle body is lowered. Will do.

  The side where the bead 28 is formed, that is, the cross-sectional shape of the other bead 26 and the bead 30 on the left side of the vehicle is also the same cross-sectional shape as the bead 28, and is formed with the same cross-sectional shape as a whole to the radially outer end. Has been.

As shown in FIG. 2, a second reference hole 34 used for positioning or the like is provided on the bottom surface 12 </ b> A of the recess 12 on the left side of the bead 16 and the bead 24 in the vehicle width direction and in the vicinity of the corner on the front side of the vehicle body. Is formed.
(Function)
When electrodepositing the vehicle body 4 of this embodiment, first, the vehicle body 4 is dipped in a paint bath (not shown) containing an electrodeposition coating liquid and pulled up to attach the electrodeposition coating liquid to the whole. The excess electrodeposition coating solution is removed and then dried.

  First, after lifting the vehicle body 4 from the paint bath, the vehicle body 4 is tilted by 20 ° so that the rear side of the vehicle body is lowered. As a result, in the recess 12 of the floor panel 10, the bead 20 on the right side of the vehicle body is in the state shown in FIG. 3A, the first inclined surface 20A is inclined so that the rear side of the vehicle body is lowered, and the second inclined surface 20B Becomes horizontal, and the third inclined surface 20C is inclined so that the rear side of the vehicle body is lowered. Further, since the rear side of the vehicle body also falls on the inclined surfaces of the other beads 18 and the beads 22, the excess electrodeposition coating liquid on the right side of the vehicle body from the beads 16 and the beads 24 in the recesses is the portions of the beads 18, 20, and 22. (The arrow A in the figure indicates the direction of the flow of the electrodeposition coating liquid), and falls through the first reference hole 32.

  Next, the vehicle body 4 is inclined 20 ° so that the front side of the vehicle body is lowered. As a result, in the recess 12 of the floor panel 10, the bead 28 on the left side of the vehicle body is in a state as shown in FIG. 4B, the first inclined surface 28A is inclined so that the front side of the vehicle body is lowered, and the second inclined surface 28B. Becomes horizontal, and the third inclined surface 28C is inclined so that the front side of the vehicle body is lowered. Further, since the front side of the vehicle body also falls on the inclined surfaces of the other beads 26 and the beads 30, the excess electrodeposition coating liquid on the left side of the vehicle body from the beads 16 and the beads 24 in the recesses is the portions of the beads 26, 28, and 30. (The arrow A in the figure indicates the direction of the flow of the electrodeposition coating liquid), drops through the second reference hole 34, and excessive electrodeposition in the recess 12 All coating liquid can be drained.

  In the present embodiment, excess electrodeposition coating liquid in the recesses can be drained using the first reference hole 32 and the second reference hole 34 provided for positioning that is originally required when manufacturing the vehicle body. Therefore, there is no need for an ED hole for the purpose of draining the electrodeposition coating liquid, and there is no need to attach a plug hole cover for closing the ED hole.

  Moreover, since it is not necessary to cut a bead on the way in order to remove the excess electrodeposition coating liquid in a recessed part, the high rigidity of the floor panel 10 is securable. Furthermore, since it is not necessary to reduce the number of beads in order to reduce ED punch holes, high rigidity of the floor panel 10 can be ensured.

  As described above, since the high rigidity of the floor panel 10 can be secured, there is no increase in vibration level due to a decrease in floor bottom rigidity, and so-called NV (noise and vibration) performance (performance for suppressing vibration and vibration noise) is secured. it can.

Although the second inclined surface 20B of the bead 20 and the second inclined surface 28B of the bead 28 of the present embodiment are horizontal when the vehicle body 4 is inclined by 20 °, the electrodeposition coating liquid can flow more easily. Thus, the inclination angle (θ ₁ ) may be set so that the vehicle body 4 is inclined in the same direction as the vehicle body inclination direction when the vehicle body 4 is inclined by 20 °. Moreover, 20 degrees of the inclination angle of the vehicle body 4 is an example, and the angle of inclination of the vehicle body 4 is not limited to 20 degrees.
[Second Embodiment]
Hereinafter, a second embodiment of the floor structure of the vehicle body in the present invention will be described. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted. In this embodiment, the shape of each bead is different from that of the first embodiment.

  As a representative, a modified example of the bead 20 described in the first embodiment will be described with reference to FIG.

  As shown in the cross-sectional view of FIG. 5A, the bead 20 of this embodiment is inclined so that the rear side of the vehicle body rises to the rear side of the third inclined surface 20C on the bottom surface 12A with the vehicle body 4 horizontal. A fourth inclined surface 20D connected to the bottom surface 12A is formed, and has a substantially W shape as a whole. The fourth inclined surface 20D is parallel to the second inclined surface 20B.

  Incidentally, in FIG. 5A, the portion indicated by a two-dot chain line indicates the first inclined surface 20A, the second inclined surface 20B, and the third inclined surface 20C of the first embodiment, and is indicated by a solid line. It can be seen that the inclination angle of the first inclined surface 20A, the second inclined surface 20B, and the third inclined surface 20C of the second embodiment shown is smaller than that of the first embodiment.

Therefore, in the present embodiment, when the vehicle body 4 is inclined as shown in FIG. 5B, even if the inclination angle θ ₂ of the vehicle body 4 is smaller than that in the first embodiment, the electrodeposition coating is performed on the bottom surface. The liquid can be allowed to flow without accumulating (in FIG. 5, the portions indicated by the two-dot chain lines are the first inclined surface 20A, the second inclined surface 20B, and the third portion of the bead 20 of the first embodiment). An inclined surface 20C is shown, and an arrow A indicates the direction of flow of the electrodeposition coating liquid.

By using the bead structure of the present embodiment, the electrodeposition coating liquid can be flowed at a smaller inclination angle, and the bead height can be increased to flow the electrodeposition coating liquid at the same angle as in the first embodiment. It is also possible.
[Third Embodiment]
Each bead in the above embodiment has the same cross-sectional shape over the entire length. For example, as shown in FIGS. 6 (A) to 6 (C), a part of the entire length is a cross-section as shown in FIG. 6 (B). As shown in FIG. 6C, another part of the entire length may be a cross-sectional shape that is symmetrical to that of FIG. 6B.

Thus, by changing the cross-sectional shape in the middle of the bead, the electrodeposition coating liquid can flow in both directions before and after the vehicle body at one bead portion.
[Other Embodiments]
In the embodiment, the bead is formed by a plurality of planar inclined surfaces, but the inclined surface may be a curved surface.

  In the above-described embodiment, the present invention has been described by taking as an example the bead formed in the concave portion 12 that accommodates the spare tire 8, but the bead of the present invention is not limited to the concave portion 12 and is formed in a portion other than the concave portion 12 of the floor panel 10. But of course.

It is a perspective view which shows the rear part of a vehicle. It is a perspective view of a floor panel. (A) is a cross-sectional view of the bead when the vehicle body is horizontal, and (B) is a cross-sectional view of the bead when the vehicle body is tilted. (A) is a cross-sectional view of the bead when the vehicle body is horizontal, and (B) is a cross-sectional view of the bead when the vehicle body is tilted. (A) is sectional drawing of the bead at the time of the vehicle body level which concerns on 2nd Embodiment, (B) is sectional drawing of the bead at the time of vehicle body inclination. (A) is a top view of the bead concerning a 3rd embodiment, (B) is a 6B-6B line sectional view of Drawing 6 (A), and (C) is 6C-6C of Drawing 6 (A). It is line sectional drawing. (A) is sectional drawing of a convex bead, (B) is sectional drawing of a bead when a vehicle body is inclined. (A) is sectional drawing of a concave bead, (B) is sectional drawing of a bead when a vehicle body is inclined. (A)-(C) are top views which show an example of a floor panel.

Explanation of symbols

10 Floor panel 4 Car body (vehicle)
18 bead 20 bead 20A first inclined surface (part inclined in the same direction as the inclination direction of the floor panel)
20B 2nd inclined surface (horizontal part)
20C 3rd inclined surface (part inclined in the same direction as the inclination direction of the floor panel)
20D 4th inclined surface (horizontal part)
22 bead 26 bead 28 bead 28A 1st inclined surface (part inclined in the same direction as the inclination direction of the floor panel)
28B 2nd inclined surface (horizontal part)
28C 3rd inclined surface (part inclined in the same direction as the inclination direction of the floor panel)
30 bead 32 reference hole (through hole)
34 Reference hole (through hole)

Claims (4)

A vehicle floor structure having a floor panel formed with reinforcing beads,
When the vehicle is tilted at an angle θ in a predetermined direction and the floor panel is viewed in a cross section along the inclination direction, a portion that is horizontal and a portion that is inclined in the same direction as the inclination direction of the floor panel A vehicle floor structure comprising the bead having an upper surface formed only from at least one. When the floor panel is viewed in a cross section along the tilt direction when the vehicle is tilted, the bead is disposed on the uppermost tilt side when the vehicle body is tilted at an angle θ in a predetermined direction. 1 inclined surface, a second inclined surface disposed below the first inclined surface, and a third inclined surface disposed below the second inclined surface,
When the vehicle is tilted at an angle θ in a predetermined direction and the floor panel is viewed in a cross section along the tilt direction, the first tilt surface and the third tilt surface are in the same direction as the tilt direction of the vehicle body. The vehicle floor structure according to claim 1, wherein the second inclined surface is inclined horizontally or in the same direction as an inclination direction of the vehicle body. When the floor panel is viewed in a cross section along the tilt direction when the vehicle is tilted, the bead is disposed on the uppermost tilt side when the vehicle body is tilted at an angle θ in a predetermined direction. 1 inclined surface, 2nd inclined surface arrange | positioned below an inclination rather than the 1st inclined surface, 3rd inclined surface arrange | positioned below an inclined side rather than the 2nd inclined surface, inclined more than the 3rd inclined surface A fourth inclined surface disposed on the lower side;
When the vehicle is tilted at an angle θ in a predetermined direction and the floor panel is viewed in a cross section along the tilt direction, the first tilt surface and the third tilt surface are in the same direction as the tilt direction of the vehicle body. The vehicle floor structure according to claim 1, wherein the second inclined surface and the fourth inclined surface are inclined horizontally or in the same direction as an inclination direction of the vehicle body.   The vehicle floor according to any one of claims 1 to 3, wherein a through hole is formed in the floor panel at a lower side in a tilt direction when the vehicle body is tilted. Construction.

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