JP6100601B2 - Aluminum automotive hood - Google Patents

Description

  The present invention relates to an automobile hood that is used by joining an inner panel and an outer panel, and more particularly, to an automobile hood having a structure excellent in discharging a treatment liquid in an electrodeposition coating process and an electrodeposition coating method thereof.

  In recent years, in order to reduce weight, automobile hoods that cover the upper part of the engine room have been made aluminum. As shown in FIG. 7, the inner panel 51 of a conventional steel plate hood is mainly provided with a large opening 52 (or a large number of openings). On the other hand, as shown in FIGS. 8 to 10, in the hood 60 made of aluminum, in order to ensure rigidity and strength, the openings of the inner panel 61 to be arranged and joined on the lower surface side of the outer panel 63 are reduced, It has a shape in which a plurality of beads 62 formed in a corrugated uneven portion are provided.

For example, as shown in FIG. 11, Patent Document 1 discloses a hood including an inner panel 71 having beads 72 in various directions such as vertical, horizontal, diagonal, and oval to ensure strength and collision safety. It is disclosed.
Further, in Patent Document 2, as shown in FIGS. 12 and 13, vertical and horizontal beads 82 are provided, and in order to adjust the strength, inner beads having through holes 83 on both the left and right sides of these beads 82 are provided. A hood with a panel 81 is disclosed.

Japanese Patent No. 3674918 Japanese Patent No. 466874

  However, in the conventional aluminum hood 60 described above, since the inner panel 61 has a small number of openings and a plurality of beads 62 are provided, when the hood 60 is immersed in the electrodeposition coating process, FIG. As shown in FIG. 10, the treatment liquid 64 that has entered the space S between the inner panel 61 and the outer panel 63 accumulates in the concave portion of the inner panel 61 and has a problem that it is difficult to be discharged to the outside. If such a treatment liquid 64 is brought into a subsequent process, the consumption of the treatment liquid 64 in the electrodeposition coating process is increased, and the treatment liquid used in the subsequent process may be deteriorated. is there. Therefore, it is necessary to prevent the processing liquid 64 from remaining in the concave portion of the inner panel 61.

As a countermeasure against this, as shown in FIG. 10, it is conceivable that a discharge hole 65 for discharging the processing liquid 64 to the outside is provided through the lowest height portion of each bead 62 of the inner panel 61. . However, depending on the required strength condition or bead shape, the discharge hole 65 cannot be provided at a required site, or a plane that is perpendicular to the molding direction and flat (area L in FIG. 10) due to the limitations of the press working mold. Since the position of the discharge hole 65 is limited such that it can only be opened, the processing liquid 64 may remain in the R portion on the bottom surface, and the processing liquid 64 may not be completely discharged to the outside.
In any of the hoods of Patent Document 1 and Patent Document 2, when the immersion treatment is performed in the electrodeposition coating process, the treatment liquid that has entered between the inner panels 71 and 81 and the outer panel is absorbed by the inner panels 71 and 81. The structure accumulates in the recess and cannot be completely discharged to the outside. That is, in Patent Document 1 and Patent Document 2, no consideration is given to the electrodeposition coating method of the hood.

  The present invention has been made in view of such a situation, and an object thereof is to efficiently discharge the treatment liquid in the electrodeposition coating process to the outside without reducing the strength and rigidity of the inner panel. An object of the present invention is to provide a possible automobile hood and an electrodeposition coating method thereof.

In order to solve the above-described problems of the prior art, the present invention provides an aluminum automobile hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel joined to each other. Is provided with a plurality of beads that are curved in an arc shape toward the front of the vehicle and that have a concave shape toward the lower side of the vehicle body , substantially parallel to the vehicle width direction. In the portion, a central connection bead of a recess that connects each of the central parts of the bead is provided substantially parallel to the vehicle front-rear direction, and the front end of the central connection bead communicates with the outside. A central through hole is provided.

The present invention also provides an aluminum automobile hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined to each other. The inner panel has an arc shape toward the front of the vehicle. A plurality of beads that are curved and have a concave shape toward the lower side of the vehicle body are provided substantially parallel to the vehicle width direction, and both end portions of the bead are provided on both left and right side portions of the inner panel in the vehicle width direction. Side connection beads of recesses that connect the two are provided along the vehicle front-rear direction, and a side through hole that communicates with the outside is provided at the rear end of the side connection beads.

Furthermore, the present invention provides an aluminum automobile hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined to each other. The inner panel has an arc shape toward the front of the vehicle. A plurality of beads that are curved and have a concave shape toward the lower side of the vehicle body are provided substantially parallel to the vehicle width direction, and an intermediate portion of the inner panel in the vehicle width direction has a central portion of the bead. The central connection beads of the recesses connecting the respective are provided substantially parallel to the vehicle longitudinal direction, and the front end of the central connection beads is provided with a central through hole communicating with the outside. , wherein the left and right side portions in the vehicle width direction of the inner panel, side connector bead recesses for connecting the respective end portions of the bead is provided along the longitudinal direction of the vehicle, The rear end of the serial side connecting bead, the side through-hole communicating with the outside is provided.

As described above, the aluminum automobile hood according to the present invention has a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined to each other, and the inner panel faces the front of the vehicle. And a plurality of beads having a concave shape toward the lower side of the vehicle body are provided substantially in parallel to the vehicle width direction, and the bead is provided at an intermediate portion of the inner panel in the vehicle width direction. A central connection bead of a recess that connects each of the central portions of the vehicle is provided substantially parallel to the vehicle longitudinal direction, and a central through hole that communicates with the outside is provided at the front end of the central connection bead. since being, in transporting the body of an automobile after immersion in the processing solution in the electrodeposition coating step, the vehicle front side for aluminum automotive hood tilt downward, the lowest center of the bead Becomes location gathered treatment liquid, without accumulating in the recess of the inner panel, smoothly can be through a central portion connecting the bead to efficiently and reliably discharged from the central portion through hole to the outside. Therefore, in the aluminum automobile hood of the present invention, it is possible to prevent the processing liquid from being carried over to the subsequent process, the consumption of the processing liquid can be suppressed, and the productivity can be improved and the cost can be reduced. Can do. In addition, since the number of through holes for discharging the processing liquid from the recesses of the inner panel is at least one and the number of through holes that reduce the strength and rigidity is small, the strength and rigidity of the inner panel should be improved. Can do. In addition, the width of the bead that is curved in an arc shape or the width of the central connecting bead is not limited and can be arbitrarily changed and selected, so that the deformation mode and strength required for the inner panel can be easily adjusted. Can increase the degree of design freedom.

The aluminum automobile hood according to the present invention has a cross-sectional structure in which a space is formed between an inner panel and an outer panel joined to each other, and the inner panel has a circular shape toward the front of the vehicle. A plurality of beads curved in an arc shape and having a concave shape toward the lower side of the vehicle body are provided substantially parallel to the vehicle width direction, and the left and right side portions of the inner panel in the vehicle width direction Side connection beads for recesses that connect both ends are provided along the vehicle front-rear direction, and a side through hole that communicates with the outside is provided at the rear end of the side connection beads. because, when issuing a motor vehicle body after immersion in the processing solution in the electrodeposition coating process from the process liquid vessel, the slope upwardly vehicle front side for aluminum automotive hood, lowest position left and right side portions of the bead It is to gather the treatment liquid, without accumulating in the recess of the inner panel, can be smoothly efficiently and reliably discharged from the side through-hole through the side connecting bead to the outside. Therefore, in the aluminum automobile hood of the present invention, it is possible to quickly return the processing liquid to the processing liquid tank and prevent the processing liquid from being carried over to the subsequent process, and the consumption of the processing liquid can be suppressed. Thus, productivity can be improved and costs can be reduced. In addition, since the number of through holes for discharging the processing liquid from the recesses of the inner panel is at least two and the number of through holes that reduce the strength and rigidity is small, the strength and rigidity of the inner panel should be improved. Can do. In addition, the width of the bead or the side connecting bead that is curved in an arc shape is not limited and can be arbitrarily changed and selected, so that the deformation mode and strength required for the inner panel can be easily adjusted. Can increase the degree of design freedom.

Furthermore, the aluminum automobile hood according to the present invention has a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined to each other, and the inner panel has a circular shape toward the front of the vehicle. A plurality of beads curved in an arc shape and having a concave shape toward the lower side of the vehicle body are provided substantially in parallel to the vehicle width direction, and the middle portion of the inner panel in the vehicle width direction has a center of the bead A central portion connecting bead of a concave portion that connects each of the portions is provided substantially parallel to the vehicle longitudinal direction, and a central portion through hole that communicates with the outside is provided at the front end portion of the central portion connecting bead. and has, wherein the right and left side portions in the vehicle width direction of the inner panel, side connector bead recesses for connecting the respective end portions of the bead is provided along the longitudinal direction of the vehicle, wherein The rear end parts connecting bead, when issuing since side through hole communicating with the outside is provided, the automotive bodies after immersion in the processing solution in the electrodeposition coating process from the process liquid vessel, an aluminum automotive The front side of the vehicle hood tilts upward and the right and left sides of the bead are at the lowest position, so that the processing liquid collects and does not collect in the recesses of the inner panel, and smoothly passes through the side connecting bead from the side through hole. It can be efficiently and reliably discharged to the outside, and when transporting the car body after immersion of the treatment liquid, the front side of the aluminum automobile hood is tilted downward and the center of the bead is the lowest position The processing liquid collects and does not collect in the recess of the inner panel, and can be discharged efficiently and reliably from the central through hole through the central connecting bead smoothly. Kill.
Therefore, in the aluminum automobile hood of the present invention, the processing liquid is quickly returned to the processing liquid tank, and the processing liquid is discharged during the conveyance, thereby reliably preventing the processing liquid from being carried over to the subsequent process. This makes it possible to further reduce the consumption of the processing liquid, and to greatly improve productivity and reduce costs. In addition, the width of the bead that is curved in an arc shape, the center connecting bead, and the side connecting bead is not limited and can be arbitrarily changed and selected, so that the deformation mode and strength required for the inner panel can be increased. It can be adjusted easily and the degree of freedom of design can be increased.

It is a perspective view which shows the inner panel and outer panel which comprise the hood for motor vehicles which concerns on 1st Embodiment of this invention in the state before joining. It is the top view which looked at the inner panel of FIG. 1 from the vehicle upper direction. It is a side view which makes the center part of the inner panel of FIG. 1 the cross section. It is the top view which looked at the inner panel which comprises the automobile hood which concerns on 2nd Embodiment of this invention from the vehicle upper direction. It is the schematic which shows the state from which the motor vehicle provided with the hood for motor vehicles of FIG. 4 comes out of the process liquid tank in an electrodeposition coating process. It is the top view which looked at the inner panel which comprises the hood for motor vehicles concerning 3rd Embodiment of this invention from the vehicle upper direction. It is a perspective view which shows the inner panel of the conventional steel plate hood. It is a perspective view which shows the inner panel of the conventional aluminum hood. It is the sectional view on the AA line in FIG. It is sectional drawing which expands and shows the X section in FIG. It is a perspective view which shows the inner panel of the other conventional aluminum hood. It is a perspective view which shows the inner panel of another conventional aluminum hood. It is a perspective view which expands and shows the side part vicinity of the inner panel in FIG.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
[First Embodiment]
1 to 3 show an automobile hood according to a first embodiment of the present invention. In addition, the arrow F direction in a figure has shown the vehicle front.

  As shown in FIGS. 1 to 3, the automobile hood 1 according to the first embodiment of the present invention is a vehicle body component that covers an upper opening of an engine room (not shown) at the front of the vehicle body in an openable and closable manner. In order to reduce the weight, it is manufactured using an aluminum material. Such an aluminum automobile hood 1 is configured by overlapping and joining the peripheral edge portion of the inner panel 2 arranged inside the vehicle body and the peripheral edge portion of the outer panel 3 arranged outside the vehicle body. And has a cross-sectional structure in which a space S is formed between the inner panel 2 and the outer panel 3.

As shown in FIGS. 1 and 2, the inner panel 2 of the present embodiment has a small number of openings in order to ensure the rigidity and strength of the automobile hood 1. A plurality of beads 4 are provided. These beads 4 are formed in a shape curved in an arc shape (bow shape) toward the front of the vehicle in accordance with the planar shape of the front and rear portions of the automobile hood 1, and extend substantially parallel to the vehicle width direction. And the concavo-convex portions are arranged alternately in the vehicle front-rear direction.
Further, as shown in FIGS. 1 to 3, in the middle portion of the inner panel 2 in the vehicle width direction, a central portion connecting bead 5 of a concave portion that connects each of the central portions 4 a of the arc-shaped beads 4 is provided in the vehicle longitudinal direction. It is provided substantially in parallel to. That is, the center connecting bead 5 extends in a straight line at the center 4 a located at the foremost end of each arc-shaped bead 4, and is provided in communication with all of the arc-shaped beads 4.
Further, a central through hole 6 communicating with the outside is provided on the bottom surface of the inner panel 2 located at the front end of the central coupling bead 5. The central through hole 6 is provided to discharge the treatment liquid 7 in the electrodeposition coating process that has entered the space S between the inner panel 2 and the outer panel 3 to the outside, as indicated by arrows in FIG. It is what was done.

The automobile hood 1 of the present embodiment is applied with electrodeposition coating in a state where it is attached to the front of a vehicle body (not shown). This electrodeposition coating is undercoating or the like performed to rust prevent the entire vehicle body including the automobile hood 1 and is performed by an electrodeposition coating method according to the following procedure.
That is, the electrodeposition coating method of the present embodiment includes a step of immersing the hood 1 for an automobile together with a vehicle body in a treatment liquid 7 stored in a treatment liquid tank outside the figure, and after the immersion of the treatment liquid 7. And lifting the vehicle body and transporting it in a horizontal position. In the step of transporting the automobile hood 1 together with the vehicle body of the automobile, the front side of the vehicle hood 1 is inclined slightly downward during the transportation of the vehicle body, so that an arc-shaped bead provided on the inner panel 2 is provided. 4 is the lowest position, and the treatment liquid 7 that has entered the space S between the inner panel 2 and the outer panel 3 during the immersion gathers in the central portion 4a of the arc-shaped bead 4. The collected processing liquid 7 flows into the concave portion of the center connecting bead 5 provided on the inner panel 2 and flows toward the front of the vehicle through the center connecting bead 5 as shown by an arrow in FIG. Then, it is discharged to the outside from the central through hole 6 at the front end portion at the lowest position, and escapes from the internal space portion S.

Thus, in the automobile hood 1 and the electrodeposition coating method thereof according to the first embodiment of the present invention, the inner panel 2 constituting the automobile hood 1 having a cross-sectional structure in which the space portion S is formed is included in the inner panel 2. A plurality of arc-shaped beads 4 curved toward the front of the vehicle are provided substantially parallel to the vehicle width direction, and each of the central portions 4a of the beads 4 is connected to an intermediate portion of the inner panel 2 in the vehicle width direction. The central connecting bead 5 is provided substantially parallel to the vehicle longitudinal direction, and a central through hole 6 communicating with the outside is provided at the front end of the central connecting bead 5 for electrodeposition coating. When the automobile body is lifted and transported after being immersed in the treatment liquid 7 in the process, the vehicle front side of the automobile hood 1 is inclined downward, and the treatment liquid 7 gathers at the central portion 4a of the bead 4 at the lowest position, Since the central connecting bead 5 is discharged to the outside through the central through hole 6, the process liquid 7 that has entered the space S in the process of immersing in the process liquid 7 is transferred to the automobile hood 1. It can be efficiently and reliably discharged outside without accumulating in the concave portion of the inner panel 2.
Therefore, according to the automobile hood 1 and its electrodeposition coating method of the present embodiment, the number of central through holes 6 that reduce the strength and rigidity is one, and the presence of the beads 4 and 5 makes the inner The strength and rigidity of the panel 2 can be increased. In addition, it is possible to prevent the processing liquid 7 from being carried over to the subsequent process, and it is possible to prevent deterioration of the processing liquid in the subsequent process while suppressing the consumption of the processing liquid 7, and to improve productivity. Running cost can be reduced.

[Second Embodiment]
4 and 5 show an automobile hood and an electrodeposition coating method thereof according to the second embodiment of the present invention. In addition, the arrow F direction in FIG. 4 has shown the vehicle front.
The inner panel 20 according to the second embodiment of the present invention is different from the inner panel 2 of the first embodiment in that instead of the center connecting bead 5 and the center through hole 6, the side connecting bead 25 and the side through The hole 26 is provided. That is, as shown in FIG. 4, the side connection beads 25 of the recesses connecting the both ends 4 b of the arc-shaped bead 4 are provided along the vehicle front-rear direction on the left and right side portions of the inner panel 20 in the vehicle width direction. These side connection beads 25 are provided at the left and right end portions 4b of the arc-shaped bead 4 so as to extend obliquely in a straight line in accordance with the planar shapes of the left and right sides of the hood 1 for an automobile. The arc-shaped beads 4 are provided in communication with each other. Further, a side through hole 26 communicating with the outside is provided at the rear end portion of the side connecting bead 25, and the processing liquid 7 that has entered the space S through the side through hole 26 is externally provided. It is configured to discharge. Other configurations are the same as those of the first embodiment, and the same members and parts are denoted by the same reference numerals.

  As shown in FIG. 5, the electrodeposition coating method of the present embodiment includes a step of immersing the automobile hood 1 together with the vehicle body 11 in the treatment liquid 7 stored in the treatment liquid tank 12, and a treatment liquid. 7, the vehicle body 11 of the automobile is lifted out from the processing liquid tank 12 while tilting the vehicle front side of the automobile hood 1 upward. In the step of taking out the automobile hood 1 from the treatment liquid tank 12 together with the automobile body 11, the vehicle body 11 is lifted by tilting the vehicle front side of the automobile hood 1 upward. The left and right end portions 4b of the arc-shaped bead 4 provided at the lowermost position are at the lowest position, and the treatment liquid 7 that has entered the space S between the inner panel 2 and the outer panel 3 during immersion is left and right of the arc-shaped bead 4 Collect at both ends 4b. The collected processing liquid 7 flows into the recesses of the left and right side connection beads 25 provided on the inner panel 2, flows through the side connection beads 25 toward the rear of the vehicle, and is at the lowest position. It is discharged to the outside from the side through hole 26 at the end, and escapes from the internal space S.

Thus, in the automobile hood 1 and the electrodeposition coating method thereof according to the second embodiment of the present invention, the inner panel 20 constituting the automobile hood 1 having a cross-sectional structure in which the space portion S is formed is included in the inner panel 20. A plurality of arc-shaped beads 4 curved toward the front of the vehicle are provided substantially in parallel to the vehicle width direction, and both end portions 4b of the beads 4 are connected to the left and right side portions of the inner panel 2 in the vehicle width direction. Side connecting beads 25 are provided along the vehicle front-rear direction, and a side through-hole 26 communicating with the outside is provided at the rear end of the side connecting beads 25, so that an electrodeposition coating process is performed. When the vehicle body 11 of the automobile is lifted and taken out from the treatment liquid tank 12 after being immersed in the treatment liquid 7 in FIG. In the process of taking out the automobile hood 1 from the treatment liquid tank 12 together with the car body 11 because the cars gather in the part 4b and are discharged from the side through hole 26 through the side connecting bead 25 to the outside. In addition, the treatment liquid 7 that has entered the space S in the step of immersing in the treatment liquid 7 can be efficiently and reliably discharged to the outside without accumulating in the concave portion of the inner panel 20.
Therefore, according to the automobile hood 1 and the electrodeposition coating method of the present embodiment, the processing liquid 7 can be quickly returned to the processing liquid tank 12 and recovered, and the processing liquid 7 is carried over to the subsequent process. Can be reliably prevented, and the consumption of the treatment liquid 7 can be further suppressed. Other effects can be obtained similarly to the automobile hood 1 and the electrodeposition coating method thereof according to the first embodiment.

[Third Embodiment]
FIG. 6 shows an automobile hood and an electrodeposition coating method thereof according to the second embodiment of the present invention. In addition, the arrow F direction in FIG. 6 has shown the vehicle front.
The automobile hood and the electrodeposition coating method thereof according to the third embodiment of the present invention are a combination of the structure of the automobile hood 1 of the first embodiment and the second embodiment and the electrodeposition coating method thereof. .
That is, the inner panel 30 according to the third embodiment of the present invention includes a central portion connecting bead 5 and a central portion through hole 6 in the inner panel 2 of the first embodiment, and a side portion in the inner panel 20 of the second embodiment. A connecting bead 25 and a side through hole 26 are provided. Other configurations are the same as those of the first embodiment and the second embodiment, and the same members and parts are denoted by the same reference numerals.

The electrodeposition coating method according to the present embodiment includes a step of immersing the hood 1 for an automobile together with the vehicle body 11 in the treatment liquid 7 stored in the treatment liquid tank 12, and an hood for the automobile after the treatment liquid 7 is immersed. The step of lifting the vehicle body 11 while tilting the front side of the vehicle 1 upward and taking it out of the treatment liquid tank 12, and the body of the automobile while tilting the front side of the vehicle hood 1 downward after being taken out of the treatment liquid tank 12 The process of conveying 11 in a horizontal posture is included. In the step of taking out the automobile hood 1 from the treatment liquid tank 12 together with the automobile body 11, the vehicle body 11 is lifted by tilting the vehicle front side of the automobile hood 1 upward. The left and right end portions 4b of the arc-shaped bead 4 provided at the lowermost position are at the lowest position, and the treatment liquid 7 that has entered the space S between the inner panel 2 and the outer panel 3 during immersion is left and right of the arc-shaped bead 4 Collect at both ends 4b. The collected processing liquid 7 flows into the recesses of the left and right side connection beads 25 provided on the inner panel 30, flows through the side connection beads 25 toward the rear of the vehicle, and is at the lowest position. It is discharged to the outside from the side through hole 26 at the end, and escapes from the internal space S.
Next, in the process of transporting the automobile hood 1 together with the automobile body 11, the front side of the automobile hood 1 is inclined slightly downward during the transportation of the automobile body 11, so that an arc shape provided on the inner panel 30 is provided. The central portion 4a of the bead 4 is at the lowest position, and the treatment liquid 7 that has entered the space S between the inner panel 30 and the outer panel 3 during immersion is collected in the central portion 4a of the arc-shaped bead 4. . The collected processing liquid 7 flows into the concave portion of the center connecting bead 5 provided on the inner panel 30 and flows toward the front of the vehicle through the center connecting bead 5 as shown by an arrow in FIG. Then, it is discharged to the outside from the central through hole 6 at the front end portion at the lowest position, and escapes from the internal space portion S.

Thus, in the automobile hood 1 and the electrodeposition coating method thereof according to the third embodiment of the present invention, the inner panel 30 constituting the automobile hood 1 having a cross-sectional structure in which the space portion S is formed is included in the inner panel 30. A plurality of arc-shaped beads 4 that curve toward the front of the vehicle are provided substantially parallel to the vehicle width direction, and each of the central portions 4a of the beads 4 is connected to an intermediate portion of the inner panel 30 in the vehicle width direction. The center connecting bead 5 is provided substantially parallel to the vehicle longitudinal direction, and a center through hole 6 communicating with the outside is provided at the front end of the center connecting bead 5. Side connection beads 25 that connect both end portions 4b of the beads 4 are provided along the vehicle front-rear direction at the left and right side portions in the vehicle width direction of the vehicle. The part is provided with a side through-hole 26 communicating with the outside. When the automobile body 11 is lifted and taken out of the treatment liquid tank 12 after being immersed in the treatment liquid 7 in the electrodeposition coating process, the automobile hood 1, the front side of the vehicle 1 is inclined upward, and the treatment liquid 7 gathers at the left and right ends 4 b of the bead 4 at the lowest position, passes through the side connection beads 25, and is discharged to the outside through the side through holes 26. When the vehicle 11 is lifted and transported, the front side of the vehicle hood 1 is inclined downward, and the processing liquid 7 gathers at the central portion 4a of the bead 4 at the lowest position and passes through the central connecting bead 5 to penetrate the central portion. Since it is made to discharge | emit outside from the hole 6, it entered the space part S in the process of immersing in the process liquid 7 in the process of taking out the automobile hood 1 from the process liquid tank 12 together with the car body 11 of the car. Treatment liquid Can be discharged to the outside from the side connecting bead 25 and the side through hole 26, and the processing liquid 7 remaining in the space S can be collected in the recess of the inner panel 30 during the transporting process of the vehicle body 11 of the automobile. It can be discharged efficiently and reliably to the outside.
Therefore, according to the automobile hood 1 and the electrodeposition coating method of the present embodiment, not only the processing liquid 7 is quickly returned to the processing liquid tank 12 and collected, but also the processing liquid 7 is temporarily removed from the inner panel 30 or the like. Even if it remains, the remaining processing liquid 7 can be discharged during the conveyance, and it is possible to reliably prevent the processing liquid 7 from being carried over to the subsequent process, thereby further reducing the consumption of the processing liquid 7. Can do. Other effects can be obtained in the same manner as the automobile hood 1 and the electrodeposition coating method thereof according to the first embodiment and the second embodiment.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Automobile hood 2 Inner panel 3 Outer panel 4 Bead 4a Center part 4b End part 5 Center part connection bead 6 Center part through-hole 20 Inner panel 25 Side part connection bead 26 Side part through hole 30 Inner panel S Space part

Claims (3)

In an aluminum automotive hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined together,
The inner panel is provided with a plurality of beads that are curved in an arc shape toward the front of the vehicle and have a concave shape toward the lower side of the vehicle body , substantially parallel to the vehicle width direction. In the intermediate part in the width direction, a central part connecting bead of a concave part that connects each of the central parts of the beads is provided substantially parallel to the vehicle longitudinal direction,
An aluminum automobile hood, wherein a front end portion of the central connecting bead is provided with a central through hole communicating with the outside. In an aluminum automotive hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined together,
The inner panel is provided with a plurality of beads that are curved in an arc shape toward the front of the vehicle and have a concave shape toward the lower side of the vehicle body , substantially parallel to the vehicle width direction. On the left and right side portions in the width direction, side connection beads of recesses that connect both ends of the beads are provided along the vehicle front-rear direction.
An aluminum automobile hood characterized in that a side through hole communicating with the outside is provided at a rear end portion of the side connecting bead. In an aluminum automotive hood having a cross-sectional structure in which a space is formed between an inner panel and an outer panel that are joined together,
The inner panel is provided with a plurality of beads that are curved in an arc shape toward the front of the vehicle and have a concave shape toward the lower side of the vehicle body , substantially parallel to the vehicle width direction. At the intermediate portion in the width direction, a central portion connecting bead of a recess that connects each of the central portions of the beads is provided substantially parallel to the vehicle longitudinal direction, and at the front end portion of the central portion connecting bead , A central through hole communicating with the outside is provided,
Side connection beads of recesses that connect both ends of the bead are provided along the vehicle front-rear direction on both left and right side portions of the inner panel in the vehicle width direction, and are provided at the rear end of the side connection bead. Is an aluminum automobile hood characterized in that a side through-hole communicating with the outside is provided.

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