JPH1159491A - Roof side duct of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof side duct for an automobile with high shock absorbing ability. SOLUTION: A roof side duct 10 for an automobile has a cylindrical hollow molding formed with an inside wall 12 directed to a room, a mounting wall 13 directed to the inner panel P of a body and side walls 14, 14 to connect the inside wall 12 to the mounting wall 13, with one end opening as an air blow port, the inside wall 12 having an air below port. A sectionally almost V-shaped groove 15 is provided almost at the crosswise center of the mounting wall 13 to adhere the inner face of the inside wall 12 to the bottom 16 of the groove along the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile roof side duct having excellent shock absorption.

[0002]

2. Description of the Related Art In recent years, in vehicles having a large cabin such as an RV car, both sides of a roof (roof side) as shown in FIG. A roof side duct 40 may be provided. The roof side duct 40 has a cylindrical shape, and an air blowing port 41 formed on one end side is connected to an air conditioner C installed near the rear tire house or the like, and cool air or warm air from the air conditioner C is supplied to the roof. The air is guided into the side duct 40 and blows out from the air outlets 43 formed in the roof side duct 40 to the rear part of the vehicle compartment.

As shown in FIG. 7, such a roof side duct 40 has an inner wall portion 45 facing the vehicle interior, a mounting wall portion 46 facing the inner panel P of the vehicle body, and the inner wall portion 45 and the mounting wall. It is formed of a cylindrical hollow molded product having a substantially rectangular cross section and comprising side wall portions 47, 47 connecting the portions 46, and an appropriate clip or the like (not shown) is attached to the inner panel P of the vehicle body via the mounting wall portion 46. Fixed at. Further, the roof side duct 40 is concealed by the ceiling interior material 48, so that the decorativeness in the vehicle interior is improved. 6 and 7, reference numeral 44 denotes an air passage formed in the roof side duct 40, reference numeral 49 denotes an opening trim for fixing a ceiling interior material to an inner panel, and reference numeral W denotes a vehicle window.

By the way, the new automobile safety standard FMVS
S201 was standardized, and a safety standard for the occupant head at the time of a vehicle collision was determined. Along with this, the function of absorbing impact energy has been required for vehicle interior materials.

However, the above-mentioned roof side duct 40
In the case of a secondary collision of the occupant's head against the inner side wall 45, since it is made of a cylindrical hollow molded product made of a hard plastic having a substantially square cross section and is not taken into consideration of shock absorption, In this case, the impact energy is absorbed only by the depressed deformation of the inner wall portion 45, and it is difficult to say that the impact absorption is sufficient. For this reason, there has been a demand for further improvement in shock absorption.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a roof side duct of an automobile which exhibits excellent shock absorption against a collision of an occupant's head. is there.

[0007]

That is, the invention of claim 1 comprises an inner wall portion facing the vehicle interior, a mounting wall portion facing the inner panel of the vehicle body, and a side wall connecting the inner wall portion and the mounting wall portion. A hollow hollow molded product comprising a hollow portion, an air blowing port provided at one longitudinal end of the hollow molded product, and an air blowing port formed at a predetermined position on the inner wall portion. A duct having a substantially V-shaped cross section in which the inner surface of the inner wall portion and the groove bottom are in close contact with the mounting wall portion.
A character-shaped groove is provided along the longitudinal direction.

According to a second aspect of the present invention, in the first aspect, the inner panel receiving surface along the surface shape of the inner panel is formed near at least one side wall of the mounting wall in the longitudinal direction of the mounting wall. It is characterized by being provided along.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. 1 is a perspective view showing an embodiment of a roof side duct according to the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, and FIG. FIG. 5 is a cross-sectional view of a reference product for explaining the absorbency, and FIG. 5 is a cross-sectional view of the same embodiment when shock is absorbed.

A roof side duct 10 according to the present invention shown in FIGS. 1 to 4 is attached to an inner panel P of a vehicle body from the vicinity of a vehicle interior ceiling to a lower portion, as shown in FIG. The air consisting of cold air or warm air from an air conditioner C installed near the tire house is blown out from the vicinity of the ceiling at the rear of the vehicle into the vehicle interior through the air passage 11 in the roof side duct 10.

The roof side duct 10 has an inner wall portion 12 facing the vehicle interior, a mounting wall portion 13 facing the inner panel P, and side wall portions 14 and 14 connecting the inner wall portion 12 and the mounting wall portion 13. It is formed of a cylindrical plastic hollow molded article made of polypropylene, and is formed to a thickness of about 1.0 to 3.5 mm with polypropylene by known blow molding or the like.
The roof side duct 10 includes a horizontal portion 21 that is long in the vehicle front-rear direction along both sides of the ceiling in the vehicle interior, and a lower bent portion 22 bent downward from the rear end of the vehicle. The lower end of the opening 22 is an air blowing port 23 from the air conditioner C. The end opposite to the air blowing port 23 is closed.

The inner side wall 1 of the roof side duct 10
2, an air outlet 24 for blowing air blown into the air passage 11 from the air conditioner C through the air inlet 23 into the vehicle interior is formed at a predetermined position. In this example, the inner wall portion 12 of the horizontal portion 21
Two air outlets 24 communicating with the internal air passage 11 are formed. The air outlet 24 is provided with a register 25 for adjusting the wind direction.

On the other hand, the mounting wall portion 13 of the roof side duct 10 is a portion used as a mounting surface to the inner panel P of the vehicle body. A groove 15 having a substantially V-shaped cross section (including a U-shaped cross section) is provided near the center of the mounting wall 13 in the width direction (the center between the side walls 14 and 14), as shown in FIGS. The groove bottom 16 is formed along the longitudinal direction of the mounting wall 13 with the groove bottom 16 being in close contact with the inner surface of the inner wall 12. By providing the groove 15, the inner wall portion 12 serving as an impact receiving surface has a groove 15
And high impact strength is provided. Further, since the groove 15 has a substantially V-shaped cross-sectional shape, the side walls 17, 17 of the groove 15 are inclined with respect to the inner wall 12, and when the occupant's head collides with the inner wall 12, the side wall 17 is closed. , 17 are easily bent and deformed, and the shock absorption is improved. Therefore, the roof side duct 10 exhibits better shock absorption than the conventional roof side duct without the groove 15. Further, the V-shaped groove 15 is formed on the inner side wall 12 of the roof side duct 10.
This also has the effect of increasing the rigidity of the inner wall portion, eliminating the bumpy feeling when touching the inner wall portion 12, and improving the shape retention. The vicinity of the air outlet 24 and the air outlet 23 is
It is preferable that the groove portion 15 is not provided and the hollow portion is formed in a substantially rectangular hollow cylindrical shape so that the fitting of the register 25 and the like and the pipe connection with the air conditioner C and the like are excellent and easy.

The opening angles a and b between the side walls 17 and 17 of the groove 15 and the surface of the inner panel P are 30 to 85.
Degree is preferred. When the opening angles a and b are smaller than 30 degrees, the V-shape of the groove portion 15 opens greatly, and the side walls 17 and 17 are easily deformed by an impact force from the vehicle interior. As a result, the rigidity of the inner side wall portion 12 of the roof side duct 10 becomes too low, and when the occupant collides with the inner side wall portion 12, the roof side duct 10 is immediately crushed and the impact cannot be sufficiently absorbed. Conversely, if the opening angles a and b are larger than 85 degrees, the V-shaped opening of the groove 15 becomes small, and the rigidity of the inner wall 12 of the roof side duct 10 becomes too high, so that the inner wall 12 Deformation is reduced, and sufficient shock absorption cannot be obtained.

Further, at least one side of the mounting wall portion 12 in the width direction, that is, closer to the side wall portion 14 on one side, an inner panel receiving surface 18 shaped to conform to the surface shape of the inner panel P is provided. It is provided along the longitudinal direction of the wall 13. The reason for providing the inner panel receiving surface 18 is as follows. If the inner panel receiving surface 1
If the reference roof side duct 1 shown in FIG.
A gap O is generated between the mounting wall portion 13A and the inner panel P due to a difference in shape between the two, as shown at 0A. Therefore, the impact force S from the vehicle interior is reduced to the roof side duct 10A.
When at least one of the two side portions 19A, 19A sandwiching the groove 15A slides on the surface of the inner panel P and "depresses" as shown by an arrow without being deformed by compression, it easily opens outward. By the way, the shock absorbing material having this kind of structure absorbs the shock energy by compressive deformation of the shock absorbing material itself in response to an external shock, so that the shock force S is efficiently absorbed. Means that the roof side duct 10A has its impact force S
It is necessary to correctly receive and compress and deform. But,
When the above-mentioned "escape" occurs, the roof side duct 10A shifts laterally without being compressed and deformed, and the roof side duct 10A cannot sufficiently exhibit a shock absorbing function as a cushioning material. Therefore, in this embodiment, FIG.
As shown in FIG. 3, the inner wall P is provided with an inner panel receiving surface 18 which comes into contact with the inner panel P to eliminate a gap between the mounting wall 13 and the inner panel P, as shown in FIG. Thus, the roof side duct 10 does not "escape" at the time of impact, is correctly compressed, and can reliably absorb the impact.

The inner panel receiving surface 18 is preferably provided at least above the groove 15 as in this example. This is because the lower side of the roof side duct 10 is generally supported by the opening trim 32 of the ceiling material 31 and is prevented from opening outward upon impact.
In this embodiment, in the horizontal portion 21, the groove 1
An inner panel receiving surface 18 having a stepped shape matching the stepped portion P1 of the inner panel P is formed on the mounting wall portion 13 above the inner wall 5.

As shown in FIG. 2, a mounting clip 26 is fixed to the mounting wall 13 at an appropriate position except for the groove 15, and the roof side duct 10 is connected to the inner side via the mounting clip 26. It can be attached to the panel P. It is preferable in terms of workability that the attachment clip 26 be integrally fixed when the roof side duct 10 is blow molded or the like.

[0018]

As described above, the roof side duct according to the present invention is formed of a hollow cylindrical molded product, and has a groove having a substantially V-shaped cross section along the longitudinal direction. Since the groove bottom is provided so as to be in close contact with the inner surface of the inner wall, the shock absorption of the inner wall serving as the shock receiving surface can be increased, and excellent shock absorption can be exhibited. is there. In addition, by providing an inner panel receiving surface along the surface shape of the inner panel along the longitudinal direction of the mounting wall near at least one side wall of the mounting wall, the roof side duct can be provided at the time of impact. The shock could be received correctly without displacement, and the shock could be reliably absorbed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a roof side duct of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a cross-sectional view of a reference product for explaining shock absorption in the embodiment.

FIG. 5 is a cross-sectional view showing the same example when shock is absorbed.

FIG. 6 is a side view showing an example of a conventional roof side duct.

FIG. 7 is a sectional view taken along a line 7-7 in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roof side duct 12 Inner side wall part 13 Mounting wall part 14 Side wall part 15 V-shaped groove part 16 Groove bottom part 23 Air blowing port 24 Air blowing port

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[Procedure amendment]

[Submission date] July 17, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

Further, at least one side in the width direction of the mounting wall portion 13 , that is, near the side wall portion 14 on one side, an inner panel receiving surface 18 shaped to conform to the surface shape of the inner panel P is attached to the mounting wall portion 13. It is provided along the longitudinal direction of the wall 13. The reason for providing the inner panel receiving surface 18 is as follows. If the inner panel receiving surface 1
If the reference roof side duct 1 shown in FIG.
A gap O is generated between the mounting wall portion 13A and the inner panel P due to a difference in shape between the two, as shown at 0A. Therefore, the impact force S from the vehicle interior is reduced to the roof side duct 10A.
When at least one of the duct side portions 19A, 19A sandwiching the groove 15A slides on the surface of the inner panel P and "depresses" as shown by the arrow without compression deformation, it is easy to open outward. By the way, the cushioning material having this kind of structure absorbs the impact energy by compressive deformation of the cushioning material itself against external impact, so that the impact force S can be efficiently absorbed. Means that the roof side duct 10A has its impact force S
It is necessary to correctly receive and compress and deform. But,
When the above-mentioned "escape" occurs, the roof side duct 10A is shifted laterally without being compressed and deformed, and the roof side duct 10A cannot sufficiently exhibit a shock absorbing function as a cushioning material. Therefore, in this embodiment, FIG.
As shown in FIG. 3, the mounting wall portion 13 is provided with an inner panel receiving surface 18 which is in contact with the inner panel P to eliminate a gap between the mounting wall portion 13 and the inner panel P, thereby, as shown in FIG. 5. Thus, the roof side duct 10 does not "escape" at the time of impact, is correctly compressed, and can reliably absorb the impact.

Claims (2)

[Claims] 1. A tubular hollow molded product comprising: an inner wall facing the vehicle interior; a mounting wall facing the inner panel of the vehicle body; and a side wall connecting the inner wall and the mounting wall.
An air outlet is provided at one end in the longitudinal direction of the hollow molded article, and a roof side duct of an automobile in which an air outlet is formed at a predetermined position on the inner wall portion, wherein the mounting wall portion has the inner side. A roof side duct for an automobile, wherein a groove having a substantially V-shaped cross section, in which an inner surface of a wall portion and a groove bottom are in close contact, is provided along a longitudinal direction. 2. An inner panel receiving surface according to claim 1, wherein an inner panel receiving surface is provided along at least one side wall of the mounting wall along a surface shape of the inner panel along a longitudinal direction of the mounting wall. The roof side duct of the car.