JP5370063B2 - Rear duct structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve assemblability of a rear duct with a simple structure without hindering a flow of air for air-conditioning, to improve a degree of freedom in design by reducing restrictions of a rear duct structure and a structure of a molding machine, and to assemble parts for this structure, while avoiding interference with surrounding parts. <P>SOLUTION: This rear duct structure for a vehicle is connected to a floor tunnel of a floor panel part of the vehicle and an air-conditioning lead-out port. The rear duct structure includes a first rear duct part, a second rear duct part and a curved intermediate part for connecting the first rear duct part and the second rear duct part, and includes a cross member provided in the floor panel part of the vehicle and having a recessed part through which the second rear duct part is passed. A projected shape in the rear duct structure is arranged at a position applied to the curved intermediate part of one or both of the first rear duct part and the second rear duct part. The rear duct structure can be temporarily bent by making the shape as a base point. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rear duct structure, and more particularly to a rear duct structure for sending air-conditioning air led out from an air conditioner to a vehicle rear seat side.

Many vehicles are equipped with an air conditioner to adjust the temperature in the passenger compartment.
The air conditioner has a main body mainly provided in the instrument panel, and an air-conditioning air outlet is provided on the design surface of the instrument panel.
In addition, some vehicles are provided with a duct structure so that air for air conditioning is blown out to the feet of the rear seat occupant to improve the comfort of the rear seat occupant.
This duct structure is called a rear duct, and one end of the rear duct is connected to the air conditioning air outlet (hereinafter referred to as the “air conditioning outlet”) of the air conditioner, passes through the area around the feet of the front seat occupant, and the other end of the rear duct The air outlet is opened to the vehicle rear seat side through a cross member provided on the floor panel of the vehicle or straddling the upper side of the cross member in the vehicle height direction.

JP-A-9-99726

By the way, in designing a duct structure, it is generally desired to consider not to disturb the flow of air-conditioning air passing through the duct as much as possible.
This is because when a duct that hinders the flow of air-conditioning air is used, the air-conditioning air having a satisfactory blowing pressure from the duct structure outlet is reduced due to a decrease in the blowing pressure of the air-conditioning air derived from the air-conditioning apparatus. This is because it cannot be obtained.

Factors that hinder the flow of air-conditioning air include duct structures that suddenly change the direction of air-conditioning air flow, and protrusions inside the duct structure that are formed by the joints between parts of the duct structure. is there.
However, on the other hand, it is also necessary to consider the ease of assembly of the duct structure body to the vehicle, and due to the relationship with the peripheral parts of the duct structure, the duct structure is divided and the direction of the air-conditioning air flow changes suddenly In some cases, it was necessary to take a duct structure.
Therefore, as a method for improving the assemblability of the duct structure itself without dividing the duct structure, a method of temporarily folding and assembling the duct structure itself is conceivable. However, depending on the duct structure, it cannot be easily bent. There are also things. For example, a rear duct structure that passes through the periphery of the foot of an occupant whose general cross section is rectangular is given as an example. The cross section here refers to a cut surface of the duct structure cut perpendicular to the flow direction of the air-conditioning air passing through the duct structure.
4 discloses a surface A having a fold line Z on the surface, surfaces B and C orthogonal to the surface A, and a surface D orthogonal to the surfaces B and C and facing the surface A. The space surrounded by each surface is a structure simulating a duct structure having a so-called rectangular cross section.
As shown in FIG. 4, when the surface A is bent with the fold line Z as a base point, the surfaces B and C intersecting the surface A at a right angle serve as bending resistance, so that it is not easy to bend.
Thus, it is not easy to bend a part such as the duct structure in which cross sections of right-angled squares such as rectangles are continuously connected.
Therefore, in order to be able to bend a duct structure having a rectangular general cross section such as a rear duct structure, it is necessary to provide a structure for folding.
As a means for solving the above problem, for example, the general cross section of the duct structure in the vicinity of the assumed bending portion is a non-right-angled quadrangle such as a so-called parallelogram or trapezoid composed of two other sides that are not orthogonal to one side. It is possible. For example, when the cross section at the fold line Z in FIG. 4 is a parallelogram, the surface A and the surfaces B and C are deformed so as to be in a parallel relationship when the fold line Z is bent as a base point. It can deform | transform so that the said surface D may approach. By taking such a deformation form, so-called bending becomes possible. However, when a structure having a non-right-angled square cross section is provided in a narrow range, a sudden cross-sectional change of the duct structure occurs in the vicinity of the duct structure bending assumption portion, and a so-called uneven shape is formed in the duct structure. If the structure having this non-right-angled quadrilateral cross section is provided in the dark cloud in the straight line portion, it becomes a factor that hinders the flow of air for air conditioning. In addition, when the range having the non-right-angled square cross section is provided as a whole, a sudden cross section change of the duct structure does not occur in the vicinity of the duct structure bending assumed portion, and therefore the influence of the cross section change is a factor that hinders the flow of air conditioning air. However, since it does not have a structure having a right-angled square cross section, the duct structure itself is easily deformed. In other words, there is a problem that the rigidity of the desired duct structure itself cannot be secured.

Among such problems, there is the above-mentioned Patent Document 1 as a conventional technique related to the rear duct structure.
What is disclosed in this Patent Document 1 is connected to the first duct portion, one end of which is connected to the air conditioning outlet of the air conditioner, and the other end of the first duct portion, and blows air for air conditioning toward the rear seat side of the vehicle. There is a second duct part inserted into a hole shape provided in the cross member of the vehicle, and the connection between the first duct part and the second duct part is bent. It is equipped with a possible bellows member.
As a result, the first duct portion and the second duct portion can be bent with respect to each other. Therefore, when the rear duct structure is inserted into the hole provided in the cross member, the rear duct structure interferes with peripheral components and the rear duct structure is not incorporated. In addition, the problem that the rear duct structure is damaged at the time of assembly can be reduced, the assembly work efficiency of the rear duct structure can be improved, and the first duct portion, the second duct portion, and the bellows member can be molded integrally. This can lead to a reduction in the number of parts.
However, on the other hand, the mold structure for molding the bellows member is complicated, the restriction of the direction of removing the mold is large, and the inside of the bellows member connecting the first duct portion and the second duct portion is a passage for air conditioning air. In addition, since the irregularities exist all around the inner wall of the bellows member, there is a disadvantage that the airflow for air conditioning by the bellows member has a considerable influence.

Other known ones are as follows.
A first duct part, one end of which is connected to the air conditioning outlet of the air conditioner, and a blower outlet connected to the other end of the first duct part for blowing air for air conditioning toward the rear seat side of the vehicle. There is a second duct portion inserted into a hole shape provided in the cross member of the vehicle, but the first duct portion and the second duct portion are separate parts, and the first duct portion and Concavities and convexities for fitting are provided at the ends of the respective duct structures connecting the second duct portion.
Although the first duct portion and the second duct portion are connected by this structure, there is a disadvantage that the structure for this fitting also affects the flow of air-conditioning air passing through the rear duct.
Moreover, since the first duct portion and the second duct portion are separate parts, there is a disadvantage that the work man-hours are increased by arranging and connecting each of them.

Furthermore, as another known one, there is a rear duct structure that is disposed across the upper side in the vehicle height direction of a cross member provided in the vehicle.
With this structure, the rear duct structure may be disposed on the cross member, and then the rear duct structure may be connected to the air conditioning air outlet of the air conditioner. It was unnecessary.
However, the rear duct structure straddles the upper side in the vehicle height direction of the cross member, so it is necessary to lift the rear duct structure once in the vehicle height direction on the vehicle front side of the cross member. There is an inconvenience that the flow of air-conditioning air that passes through the air-conditioner becomes a factor that hinders the flow.

  The present invention has a folding part for the purpose of improving the assembling property of the rear duct structure and improving the assembling property of the rear duct structure without greatly hindering the flow of air conditioning air flowing through the rear duct structure and by a simpler structure than the prior art. The rear duct structure and the rear duct structure generated by the structure for improving the assembly of the rear duct structure to the vehicle, ensuring the rigidity that can secure the cross-sectional area through which the air for air conditioning passes inside the rear duct structure The purpose is to reduce the restrictions on the structure of the molding machine, improve the degree of design freedom, and attach this part to the vehicle while avoiding interference with surrounding parts of the rear duct structure.

Therefore, in order to eliminate the inconvenience described above, the present invention provides a floor tunnel provided in the vehicle width direction center of the vehicle floor panel portion and extending in the vehicle front-rear direction, a rear duct structure connected to the air conditioning outlet of the air conditioner, The rear duct structure has one end connected to the air conditioning outlet of the air conditioner, and a first rear duct section having a structure inclined along the vertical wall of the floor tunnel structure toward the lower side in the vehicle height direction behind the vehicle, and the floor panel A second rear duct portion disposed along the horizontal plane of the first portion and a middle portion (first curved portion) that is connected to the other end of the first rear duct portion and connects the second rear duct portion (hereinafter referred to as “curved”). Intermediate portion ”), provided in the floor panel portion of the vehicle, extending in the vehicle width direction, and further having a recess portion through which the second rear duct portion can be passed. In rear duct structure for a vehicle provided with a cross member, said first rear duct portion, the second one of the rear duct portion, or the first convex shape which is convex in the rear duct structure in a position according to the intermediate portion of both of the curved It is characterized in that the rear duct structure can be temporarily bent based on the shape of the portion .

  According to the present invention, the structure for improving the assemblability of the rear duct structure does not significantly impede the flow of air-conditioning air passing through the rear duct structure, and the structure of the molding machine having the rear duct structure becomes simple. It is possible to secure rigidity capable of ensuring a cross-sectional area through which air-conditioning air passes through the interior of the rear duct structure while making the rear duct structure having a bent portion for the purpose of improving the assemblability of the rear duct structure. The number of parts can be reduced, and the factor that hinders the flow of air-conditioning air at the connection part between the parts can be reduced.

FIG. 1 is a perspective view of a rear duct structure (left side) as viewed from the rear left side of the vehicle, showing a folded state when the rear duct structure is assembled and a state before being folded. (Example) FIG. 2 is a schematic perspective view seen from the left rear side of the vehicle in a state where the rear duct structure (left side) is assembled to the vehicle. (Example) FIG. 3 is a perspective view of the rear duct structure (left side) viewed from the left rear side of the vehicle. (Example) FIG. 4 is a schematic explanatory view of a rear duct structure having a rectangular cross section. FIG. 5 is a perspective view of the rear duct structure (left side) as viewed from the rear left side of the vehicle. (Example) FIG. 6 is a perspective view of the rear duct structure (left side) viewed from the Y direction of FIG. (Example) FIG. 7 is a view showing a cross section of the folded portion of the rear duct structure (left side). (Example) FIG. 8 is a perspective view of the rear duct structure (left side) showing Modification 1 as viewed from the left rear side of the vehicle. (Example) FIG. 9 is a perspective view of the rear duct structure (left side) showing Modification 2 as viewed from the left rear side of the vehicle. (Example)

  Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 7 show an embodiment of the present invention.
2 and 3, 1 is a vehicle instrument panel (not shown), 2 is a floor panel portion of the vehicle, 3 is a floor tunnel provided in the center of the floor panel portion 2 in the vehicle width direction and extends in the vehicle front-rear direction, 4 is a floor A cross member provided in the panel portion 2, 5 is an air conditioner, and 6 is a rear duct structure assembled to the vehicle.
The air conditioning outlet 8 of the air conditioner 5 connected to the air conditioning outlet fitting portion 7 formed at one end of the rear duct structure 6 is located at the lower part of the instrument panel 1 as shown in FIGS. The vehicle width direction center exists symmetrically on the left and right.
The opening surface of the air conditioning outlet 8 faces outward in the vehicle width direction and opens substantially horizontally with respect to the vehicle width direction.
The rear duct structures 6 connected to the air conditioning outlets 8 respectively exist, and the rear duct structures 6 have a structure that is symmetrical with respect to the center in the vehicle width direction, and are disposed on the left and right sides in the vehicle width direction. The air outlet 9 of these rear duct structures 6 is provided in the vehicle height direction lower side (not shown).
Hereinafter, regarding the description of the rear duct structure 6, since the rear duct structure 6 has a symmetrical shape with respect to the center in the vehicle width direction, only the left rear duct structure 6 assembled on the left side of the vehicle will be described and assembled on the right side of the vehicle. A description of the right rear duct structure is omitted.

As shown in FIG. 2, the floor tunnel 3 is provided in the vehicle width direction center of the vehicle floor panel portion 2 in the vehicle front-rear direction, and has a convex shape toward the inside of the passenger compartment (not shown). A floor tunnel structure 10 is configured.
On the other hand, the cross member 4 is arranged on the vehicle compartment side of the floor panel portion 2 of the vehicle over the vehicle width direction.
At this time, the cross member 4 is provided on the floor panel portion 2 of the vehicle and extends in the vehicle width direction, and further has a recessed portion 11 through which a second rear duct portion 14 described later can be passed.
For this reason, the cross member 4 has a shape that protrudes toward the vehicle interior side, and the second rear duct portion 14 can be fixed by passing the second rear duct portion 14 from the vehicle front side through the recess portion 11.
A front seat is disposed above the cross member 4 in the vehicle height direction.

The rear duct structure 6 includes a first rear duct portion 13 having a structure inclined toward the vehicle height direction lower side at the rear of the vehicle along the vertical wall 12 of the floor tunnel structure 10, and other than the first rear duct portion 13. The second rear duct part 14 connected to the end and arranged along the substantially horizontal plane of the floor panel part 2 and the curved intermediate part 15 connecting the first rear duct part 13 and the second rear duct part 14 are configured. The
That is, in the rear duct structure 6, the air-conditioning air led out from the air conditioning outlet 8 of the air conditioner 5 sequentially passes through the first rear duct part 13, the curved intermediate part 15, and the second rear duct part 14, It blows out from the blower outlet 9 to the vehicle rear seat side.
As shown in FIGS. 2 and 3, one end of the first rear duct portion 13 is connected to the air conditioning outlet 8 of the air conditioner 5 from the outside in the vehicle width direction, and the vehicle is formed along the vertical wall 12 of the floor tunnel structure 10. It has a structure that is inclined downward in the height direction and rearward of the vehicle.
Further, as shown in FIG. 3, the curved intermediate portion 15 is provided between the first rear duct portion 13 and the second rear duct portion 14, and each of the first rear duct portion 13 and the second rear duct portion 14. Is connected.
The second rear duct portion 14 is arranged along a substantially flat surface of the floor panel portion 2, has a structure inclined to the vehicle width direction outer side and the vehicle rear side, and passes through the second bending portion 17 to the vehicle. The recessed portion provided in the cross member of the vehicle has a blowout port 9 that extends rearward and blows out air-conditioning air led out from the air conditioning outlet 8 of the air conditioner 5 to the vehicle rear seat side. 11 is inserted.
Further, the second rear duct portion 14 is provided with a structure for fixing to the cross member.

At this time, the first convex portion 16 that is convex in the rear duct structure 6 is arranged at a position on one or both of the first rear duct portion 13 and the second rear duct portion 14 and the curved intermediate portion 15. The first rear duct 13 can be temporarily bent based on the shape.
More specifically, the first convex portion 16 is provided from the downstream of the first rear duct portion 13 to the intermediate portion 15 that curves. The folding position and the folding direction of the rear duct structure 6 bent by the first convex portion 16 are determined, and the air conditioning outlet 8 is set to exist on the rotation locus of the air conditioning outlet fitting portion 7 at this time. Has been.
That is, when the rear duct structure 6 is assembled to the vehicle, the rear duct structure 6 is temporarily bent with the first convex portion 16 as a base point, and is attached to the vehicle while avoiding interference with surrounding parts of the rear duct structure 6. it can. Further, the bent rear duct structure 6 is connected to the air conditioning outlet 8 of the air conditioner 5 by returning the bent rear duct structure 6 to the state before being bent in the state of being assembled to the vehicle. Accordingly, it is possible to improve the efficiency of assembling the rear duct structure 6 to the vehicle.
Further, since it is only necessary to provide the first convex portion as a structure for bending the rear duct structure 6, it is not necessary to make a complicated rear duct structure, and the structure of the molding machine of the rear duct structure 6 and the rear duct structure 6 is also simple. It will be a thing.
Furthermore, since the rear duct structure 6 can be bent by the first convex portion 16, it is not necessary to divide the rear duct structure 6 in consideration of the assembling property of the rear duct structure 6. It is possible to reduce factors that hinder the flow of air for air conditioning.

Here, a method of assembling the rear duct structure 6 to the vehicle will be described.
First, as shown in FIG. 1, the first rear duct portion 13 is bent so as to approach the second rear duct portion side with the first convex portion 16 as a base point.
And while maintaining the state which bent the said 1st rear duct part 13, the blower outlet 9 of the said 2nd rear duct part 14 is shown in the said recessed part 11 provided in the said cross member 4 from the vehicle front side as shown in FIG. Insert it and let it pass through the back of the vehicle.
Thereafter, the bent first rear duct portion 13 is raised inward in the vehicle width direction, and the first rear duct portion 13 and the air conditioning outlet 8 of the air conditioner 5 are connected.
Then, the rear duct structure 6 is fixed to the vehicle using the fixing structure of the rear duct structure 6 provided on the second rear duct portion 14 and the cross member, and the assembly of the rear duct structure 6 to the vehicle is completed.
After this assembly, a floor carpet (not shown) is attached to the vehicle, a console member (not shown) is attached on the floor carpet, and the rear duct structure 6 and the floor carpet are connected to the vertical wall 12 of the floor tunnel structure 10. Between them.
The rear duct structure 6 is attached so as to be pressed inward in the vehicle width direction by the console member, and the rear duct structure 6 does not come off from the air conditioning outlet 8 of the air conditioner 5 in a normal use state. .
Furthermore, since there is also a floor carpet between the console member and the rear duct structure 6, the console member and the rear duct structure 6 do not come into contact with each other, and there is no possibility that a contact sound or the like is generated.

Next, the structure of the rear duct structure 6 of the present invention will be described.
The first rear duct portion and the second rear duct portion constituting the rear duct structure 6 of the present invention have a general cross section of a rectangle, and as shown in FIGS. 5 and 6, a surface M1 of the first rear duct portion 13 is formed. The surface M2 of the second rear duct portion 14 is connected via the curved intermediate portion 15, and the surface M3 of the first rear duct portion 13 is connected via the intermediate portion 15 curved to the surfaces M4 and M5 of the second rear duct portion 14. Connected.
And although the surface M1 of the first rear duct portion 13 faces the front side of the vehicle, it becomes the surface M2 of the second rear duct portion 14 facing the lower side in the vehicle height direction through the curved intermediate portion 15, and the vehicle width A part of the surface M3 of the first rear duct portion 13 facing outward in the direction becomes a surface M5 of the second rear duct portion 14 facing upward in the vehicle height direction via the curved intermediate portion 15, and from the first rear duct portion 13 There are two surfaces where the direction of the surface changes over the second rear duct portion 14.
Further, the surface M6 exists from the first rear duct portion 13 to the curved intermediate portion 15 and disappears on the curved intermediate portion 15.
In the present invention, there are two surfaces whose directions change from the first rear duct portion 13 to the second rear duct portion 14, but the number of the surfaces whose direction changes is three or more. But it ’s okay.
In addition, the first rear duct portion 13 has a structure inclined from the air conditioning outlet 8 of the air conditioner 5 along the vertical wall 12 of the floor tunnel structure 10 toward the vehicle height direction lower side behind the vehicle. The ridge line i on the first rear duct part 13 composed of the surface M3 and the surface M6 disappears on the curved intermediate part 15, while the ridge line ii on the second rear duct part 14 composed of the surface M4 and the surface M5. Has a structure that appears from above the curved intermediate portion 15.
Here, the ridge line ii appears before the ridge line i disappears in the curved intermediate portion 15.
This is because an unnecessary rigidity reduction of the rear duct structure 6 is avoided.
The disappearance of the ridge line i means that the structure in which the surface M3 and the surface M6 are orthogonal to each other disappears, which causes a decrease in the rigidity of the rear duct structure 6, while the ridge line i disappears. When the ridge line ii appears, a structure in which the surface M4 and the surface M5 are orthogonal to each other appears, and a reduction in rigidity of the rear duct structure 6 can be avoided.
Furthermore, in order to bend the rear duct structure 6 reliably and to determine the folding position and direction of the folding, in the embodiment of the present invention, a first convex portion 16 is provided to allow the rear duct structure 6 to be folded.
Thereby, the rigidity reduction of the said rear duct structure 6 can be minimized by the structure aiming at the assembly | attachment property of the said rear duct structure 6. FIG.
In the present invention, the cross-sectional area of the general cross section of the rear duct structure 6 in the curved intermediate portion 15 is ensured to be equal to the cross-sectional areas of the general cross sections of the first rear duct portion 13 and the second rear duct portion 14, and the curved intermediate portion 15. Avoids unnecessary pressure loss of air-conditioning air.

In addition, in FIG. 5 and FIG. 6, the point b is a surface on the ridge line iii that is composed of the surface M1, the surface M2, the surface M3, and the surface M4 and exists from the first rear duct portion 13 to the second rear duct portion 14. The side cd formed on the surface M3 having the short side of the general cross section of the first rear duct portion 13 and the surface M6 is a point that exists on the curved intermediate portion 15 where M1 is changed to the surface M2. This is a line passing through a portion of the portion 16 that is most convex in the rear duct structure 6.
FIG. 7 shows a cross section passing through points b, c, and d, that is, a so-called base point for bending the rear duct structure 6 in the embodiment of the present invention (hereinafter referred to as “folded section cross section”).
Here, the intersection of the ridge line iii that forms the surface M1 of the first rear duct portion 13 and the ridge line iv that faces on the surface M1 when the cross section passes through the points b, c, and d, that is, the cross section of the folded portion, is the point a. The intersection point with the ridge line ii on the second rear duct portion 14 when cut in the same cross section is the point e, the cross-sectional shape shown by the solid line shows the state before the rear duct structure 6 is bent, The cross-sectional shape shown shows the state when the rear duct structure 6 is bent.
In addition, the point f is a virtual intersection of the cutting surface and the ridge line i at the same position as the section of the bent portion when the first convex portion 16 is not provided.
Thus, it can be seen that the surface abecd has a non-rectangular cross section (pentagonal cross section) different from the general cross sections of the first rear duct portion 13 and the second rear duct portion 14.
This is related to the ridgeline ii on the second rear duct portion 14 when cut at a cross section passing through the points b, c, d, that is, at the cross section of the bent portion, and the rear duct structure 6 of the present invention is related to the first rear duct portion 13. In contrast, the general cross section is a rectangular cross section, whereas the folded cross section is a non-rectangular cross section (pentagonal cross section), and the second rear duct portion 14 returns to the rectangular cross section again.
That is, it can be seen that the rear duct structure 6 of the present invention does not pass through a certain cross-sectional shape.

On the other hand, when the first convex portion 16 is not provided, the cross section of the bent portion is indicated by a surface abefd in FIG.
However, in this case, as described above, the vicinity of the point f is hard (in other words, it is difficult to deform), and it is not easy to bend the rear duct structure 6.
It can be seen that in order to bend the rear duct structure 6, it is necessary to provide the first convex portion 16, which is a structure for reducing the rigidity in the vicinity of the point f.

The movement of the curved intermediate portion 15 when the first rear duct portion 13 is bent toward the second rear duct portion 14 will be described using cross sections passing through points b, c, and d, that is, cross sections of the fold portions.
When the first rear duct portion 13 is bent toward the second rear duct portion 14, as shown in FIG. 7, the point a rotates upward in the vehicle height direction with the side bd as the bending reference line (the position of the point a at that time is Point a ′), the side ab becomes a side a′b, and the side da becomes a bow shape on the side da ′.
The point c rotates downward in the vehicle height direction with respect to the side bd as opposed to the point a (the position of the point c at that time is assumed to be a point c ′). At the same time, the point e is the side a′b, Move to the point e ′ so as to approach the side da ′, the side be becomes the side be ′, and the side ec becomes the side e′c ′.
As a result, the rear duct structure 6 can be bent because the cross section of the rear duct structure 6 is crushed as shown by the plane a′be′c′d in FIG.

  The material used for the parts such as the rear duct structure 6 is a synthetic resin such as polyethylene. Since this is a material having flexibility as a characteristic, there is no problem even if it is bent as in the present invention. There is nothing.

The influence on the air-conditioning air passing through the rear duct structure 6 by arranging the first convex portion 16 will be described.
After the rear duct structure 6 is connected to the air conditioning outlet 8, the air conditioning air led out from the air conditioning outlet 8 of the air conditioner 5 is a surface N (FIG. 5) above the surface M3 of the first rear duct portion 13. The surface of the shaded portion facing the opening of the air conditioning outlet 8), and then flows toward the lower side in the vehicle height direction of the first rear duct portion 13, that is, the lower portion.
The air-conditioning air flowing through the lower part of the first rear duct part 13 mainly passes through the lower part of the curved intermediate part 15 and flows to the second rear duct part 14.
Thus, when the flow of the air-conditioning air passing through the rear duct structure 6 is seen, the position where the first convex portion 16 is provided is disposed at a position opposite to the lower portion where a large amount of air-conditioning air passes. Thus, it can be seen that the first convex portion 16 is not at a position that greatly inhibits the flow of the air-conditioning air, and the first convex portion 16 does not significantly affect the blowing pressure of the air-conditioning air that passes through the rear duct structure 6.
From the above, the present invention has a structure in which the ridge line is not passed from the first rear duct part to the second rear duct part, and the structure in which the ridge line is not passed so that the air flow for air conditioning passes through the first duct through the rear duct structure. The rear duct structure can be bent by these structures.

  The present invention is not limited to the above-described embodiments, and various application modifications are possible.

For example, in the embodiment of the present invention, when the first convex portion 16 is formed, the side cd is formed in a so-called wedge shape that passes through the portion of the first convex portion 16 that is most convex in the rear duct structure 6. Although the configuration is adopted, instead of the first convex portion 16, it is possible to adopt a special configuration in which the first convex portion 21 that is convex in an arc shape is formed in the rear duct structure 6.
That is, as shown in FIG. 8, the first convex portion 21 is provided from the downstream side of the first rear duct portion 13 of the rear duct structure 6 to the first curved surface 15.
As is apparent from FIG. 8, the side cd does not appear, that is, the first convex portion 21 is formed in a shape that is convex in an arc shape in the rear duct structure 6.
In other words, in the present embodiment, the first convex portion 16 of the embodiment of the present invention is changed from the wedge shape to the first convex portion 21 that is convex in an arc shape in the rear duct structure 6. The following effects can be obtained, that is, the following effects.
This leads to an improvement in the efficiency of assembling the rear duct structure 6 to the vehicle.
Further, the structure for improving the assemblability of the rear duct structure 6 does not significantly impede the flow of air-conditioning air passing through the rear duct structure 6, and the structure of the molding machine for the rear duct structure 6 becomes simple.
Furthermore, it is possible to ensure rigidity capable of ensuring a cross-sectional area through which air-conditioning air passes through the interior of the rear duct structure, while the rear duct structure has a bent portion for the purpose of improving the assemblability of the rear duct structure.
In addition, the number of parts can be reduced, and the factor that hinders the flow of air-conditioning air at the connection part between the parts can be reduced.

Moreover, in the Example of this invention, it was set as the structure which forms the 1st convex part 16, However, It is also possible to set it as the special structure which forms the several convex part 31 in two or more places.
That is, when forming the convex part 31 in two places, if it is set as the 1st, 2nd convex part 32, 33, as shown in FIG. 9, the 1st convex part 32 will be in the said rear duct structure 6 in the Example of this invention. The same location and structure as the first convex portion 16 that is convex are used.
Then, as shown in FIG. 9, the second convex portion 33 protrudes into the rear duct structure 6 in the same manner as the first convex portion 32 at a position opposite to the first convex portion 32 across the first curved surface 15. The structure is as follows.
Then, the rear duct structure 6 can be bent smaller and temporarily because the bent portion of the rear duct structure 6 has two locations of the first convex portion 32 and the second convex portion 33.

Furthermore, in the embodiment of the present invention, the ridgeline forming the rear duct structure 6 is not continuously passed from the first rear duct portion 13 to the second rear duct portion 14 and the first convex portion 16 is provided. , A structure in which the first convex portion 16 is formed to be long, that is, the ridge line of the first rear duct portion 13 and the second rear duct portion 14 passes continuously through the curved intermediate portion 15 and the first rear duct portion. The first convex part 16 is provided to the second rear duct part 14 through the intermediate part 15 curved from 13, and the cross-section of the folded part is a non-right-angled square section that is a parallelogram or trapezoid, or The ridge lines of the first rear duct part 13 and the second rear duct part 14 are interrupted on the curved intermediate part 15 and the intermediate part 15 curved from the first rear duct part 13 A structure in which a first convex portion 16 to the rear duct portion 14, the bent line portion cross-section can also be a non-right-angled quadrangular cross-section which is a parallelogram or a trapezoid.
In addition, the pressure loss of the air for air conditioning which passes through the inside of the rear duct structure 6 by the 1st convex part 16 can be reduced by performing the cross-sectional change from a general part to a broken part smoothly.
Then, the following effects can be obtained.
This leads to an improvement in the efficiency of assembling the rear duct structure 6 to the vehicle.
Further, the structure for improving the assemblability of the rear duct structure 6 does not significantly impede the flow of air-conditioning air passing through the rear duct structure 6, and the structure of the molding machine for the rear duct structure 6 becomes simple.
Furthermore, the number of parts can be reduced, and the factor that hinders the flow of air-conditioning air at the connection part between the parts can be reduced.
Further, since the first convex portion necessary for bending is provided from the first rear duct portion 13 to the second rear duct portion 14 through the intermediate portion 15 that is curved, the rear duct is compared with the embodiment of the present invention. There is a degree of freedom in the bending portion and the bending direction of the structure, and the rear duct structure can be assembled while adjusting the bending portion and the bending direction according to the situation of the peripheral parts.
However, since the rear duct structure 6 has a degree of freedom of bending, it also has a feature that it is more easily deformed than the rear duct structure 6 in which the bent portion and the bending direction are determined as in the embodiment of the present invention. When it is necessary to ensure rigidity as in the example, the structure of the embodiment of the present invention is superior to the present plan.

Further, the rear duct structure 6 may be a substantially straight line.
The first rear duct portion 23 connected to the air conditioner and the second rear duct portion 24 along a substantially horizontal plane of the floor panel are connected in a substantially straight line, and the intermediate portion 25 is intermediate between the first rear duct portion 23 and the second rear duct portion 24. It is assumed that the structure exists.
Further, the vehicle provided with the cross member 4 which can be passed through the rear duct structure 26 therein, a structure through which the intermediate portion 25 near the interior of the cross member 4.
Further, a front seat is disposed above the cross member in the vehicle height direction.
Further, a first convex portion 16 for bending the rear duct structure 26 is provided in the vicinity of the intermediate portion 25, and the cross section of the bent portion is a non-right-angled square cross section that is a parallelogram or a trapezoid.
The range in which the first convex portion 16 is provided is within the range in which the front seat is disposed on the upper side in the vehicle height direction in the assembled state of the rear duct structure 26 to the vehicle.
As a result, the front seat is disposed in the vehicle height direction upper side of the so-called rigidity reduction portion in the range where the first convex portion 16 is provided in the rear duct structure 26, so that the fold portion of the rear duct structure 26 can be directly stepped on by the occupant. There is no worry, and in this case, a decrease in the rigidity of the rear duct structure 26 by providing a bent portion does not cause a problem. Therefore, this proposal is effective for assembling the rear duct structure 26 to a vehicle.
In this case, the ridge line of the rear duct structure 26 may be arbitrarily passed from the first rear duct portion 23 to the second rear duct portion 24.

DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Floor panel part 3 Floor tunnel 4 Cross member 5 Air conditioner 6 Rear duct structure 7 Air conditioning outlet fitting part 8 Air conditioning outlet 9 Air outlet 10 Floor tunnel structure 11 Recessed part 12 Vertical wall 13 1st rear duct part 14 Second rear duct part 15 Curved intermediate part (first curved part)
16 1st convex part 17 2nd bending part Z Folding line A, B, C, D surface M1 surface of 1st rear duct part M2 surface of 2nd rear duct part M3 surface of 1st rear duct part M4, M5 surface of 2nd rear duct part A ridge line on the first rear duct part composed of the surface i, the face M3 and the face M6 ii A ridge line on the second rear duct part composed of the face M4 and the face M5, and iii It is composed of the face M1, the face M2, the face M3 and the face M4. Ridge line iv The ridge line that faces the ridge line iii forming the surface M1 on the surface M1 N The surface of the upper portion of the surface M3 of the first rear duct portion

Claims (5)

A first rear duct portion having a structure in which one end is connected to the air conditioning outlet of the air conditioner and is inclined along the vertical wall of the vehicle body panel toward the lower side in the vehicle height direction, along the horizontal plane of the floor panel portion A second rear duct portion to be disposed; a curved intermediate portion connected to the other end of the first rear duct portion and connected to the second rear duct portion; and provided on the floor panel portion of the vehicle and extending in the vehicle width direction. , intermediate further in rear duct structure for a vehicle having a cross member with a recessed portion capable of passing the second rear duct portion therein, said first rear duct portion, one of said second rear duct portion, or to the curvature of both the first convex portion of the rear duct structure in a convex shape in the position according to the section located, the rear duct structure that can be temporarily bent to base its shape Rear duct structure characterized.   2. The rear duct structure according to claim 1, wherein a ridge line between the first rear duct portion and the second rear duct portion is interrupted on the curved middle portion.   2. The rear duct structure according to claim 1, wherein the first convex portion according to claim 1 is provided over the first rear duct portion, the curved intermediate portion, and the second rear duct portion.   The ridge line of the first rear duct portion and the second rear duct portion passes continuously through the curved intermediate portion, and the first convex portion of the first rear portion of the first rear duct portion and the curved intermediate portion; The rear duct structure according to claim 1, wherein the rear duct structure is provided over the second rear duct portion. A first rear duct portion having one end connected to the air conditioning outlet of the air conditioner; a second rear duct portion connected to the other end of the first rear duct portion and disposed along the horizontal plane of the floor panel portion of the vehicle; An intermediate portion that exists between one rear duct portion and the second rear duct portion; a rear duct structure that includes the first rear duct portion, the intermediate portion, and the second rear duct portion; and a floor panel portion of the vehicle, In addition, in the rear duct structure of the vehicle including a cross member having a structure that allows the rear duct structure to pass therethrough, the first rear duct portion, the curved intermediate portion, and the second rear duct portion are connected in a straight line, and the curved portion the rear duct shape which is convex and disposed within the structure, the rear duct temporarily bent that the structure its shape base point position according to the intermediate portion of Rear duct structure characterized in that it.

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