JP3403325B2 - Car roof side duct - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a roof side duct of an automobile having excellent shock absorption. 2. Description of the Related Art In recent years, automobiles having a large cabin, such as RVs, have been installed on both sides of the roof (roof) as shown in FIG. The side) may be provided with a roof side duct 40. 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. 7 is an air passage formed in the roof side duct 40, 49 is an opening trim for fixing the ceiling interior material to the inner panel, and W is a window of the car shown in FIG. is there. 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. 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 for an automobile which exhibits excellent shock absorption against a collision of an occupant's head. Is what you do. [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 the inner wall portion and the mounting wall portion. An automobile having a cylindrical hollow molded product having a side wall portion to be connected, 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 side wall portion. A roof-side 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 each other at the center in the width direction of the mounting wall portion, in the vicinity of the air outlet and the air inlet. The inner panel receiving surface having a step shape conforming to the surface shape of the inner panel is provided on the mounting wall portion on the upper side of the groove portion so as to match the step portion of the inner panel.
The mounting wall is provided along the longitudinal direction of the mounting wall. The present invention will be described below in detail with reference to the accompanying drawings. FIG. 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 a line 2-2 of FIG. 1 in which a roof side duct is attached to an inner panel of a vehicle body and a register is fitted into an air outlet. FIG. 3 is a cross-sectional view of FIG. 1 taken along line 3-3, FIG. 4 is a cross-sectional view of a reference product for explaining shock absorption in the embodiment, and FIG. 5 is a cross-sectional view of the embodiment when shock is absorbed. is there. A roof side duct 10 according to the present invention shown in FIGS . 1 to 3 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 and 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. , 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 15 is not provided and the hollow tube is formed in a substantially rectangular hollow 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, an inner panel receiving surface 18 having a shape along the surface shape of the inner panel P is provided on the upper side of the mounting wall portion 13 near the side wall portion 14 in the width direction, in the longitudinal direction of the mounting wall portion 13. It is provided along. The reason for providing the inner panel receiving surface 18 is as follows. If the inner panel receiving surface 18 is not provided, like the reference roof side duct 10A shown in FIG.
Due to the difference in shape between 3A and the inner panel P, a gap O is generated between the two. Therefore, the impact force S from the vehicle interior
Is applied to the inner side wall portion 12A of the roof side duct 10A, at least one of the duct side portions 19A, 19A sandwiching the groove 15A slides on the surface of the inner panel P and does not "depress" as shown by an arrow without compressively deforming. To open easily. By the way, the cushioning material having this kind of structure absorbs the impact energy by compressive deformation of the cushioning material itself in response to an external impact,
In order to efficiently absorb the impact force S, it is necessary that the roof side duct 10A correctly receives the impact force S and undergoes compression deformation. However, when the "escape" occurs as described above, 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, as shown in FIGS. 2 and 3, the mounting wall portion 13 is provided with an inner panel receiving surface 18 which is in contact with the inner panel P, so that the mounting wall portion 13 and the inner panel P
The gap between them is eliminated, so that the roof side duct 10 does not "escape" in the event of an impact, as shown in FIG.
The compression is correctly performed so that the impact can be reliably absorbed. The inner panel receiving surface 18 is preferably provided at least above the groove 15 as shown. 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.
Furthermore, in this embodiment, the inner panel P is attached to the mounting wall 13 above the groove 15 in the horizontal portion 21.
An inner panel receiving surface 18 having a step shape matching the step portion P1 is formed. As shown in FIG. 2, a mounting clip 26 is fixed to the mounting wall 13 at an appropriate position except 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. As shown and described above, the roof side duct of the present invention is formed of a hollow cylindrical molded product, and has a substantially V-shaped cross section along the longitudinal direction on the mounting wall thereof. Because the groove-shaped groove is provided so that the groove bottom is in close contact with the inner surface of the inner wall, it is possible to increase the shock absorption of the inner wall serving as a shock receiving surface, and to exhibit excellent shock absorption. It was done. In addition, since the groove is not provided near the air outlet and the air inlet, fitting of a register or the like and connection of a pipe to an air conditioner or the like can be made good and easy. Moreover, the the mounting wall portion of the upper side of the groove, the inner panel receiving surface consisting of stage shape along the surface shape of the inner panel, the in-
As the shape conforms to the step of the panel, it is provided along the longitudinal direction of the mounting wall , so that the roof side duct can receive the impact correctly without displacement at the time of impact, and it can absorb the impact reliably. You can do it.

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 cross-sectional view taken along a line 2-2 in a state where the roof side duct in FIG. 1 is attached to an inner panel of a vehicle body and a register is fitted into an air outlet. 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. 7 is a sectional view taken along line 7-7 in FIG. 6. [Description of References] 10 Roof side duct 12 Inner side wall 13 Mounting wall 14 Side wall 15 V-shaped groove 16 Groove bottom 23 Air blowing port 24 Air blowing port

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 25/06 B60R 21/04

Claims (1)

(57) and the Patent Claims 1 inner wall 12 facing the passenger compartment, a mounting wall portion 13 facing the vehicle body inner panel P, the inner wall portion 1
2 and a side wall portion 14 connecting the mounting wall portion 13 to form a cylindrical hollow molded product. An air blowing port 23 is provided at one longitudinal end of the hollow molded product. Is a roof side duct of an automobile having an air outlet 24 formed therein.
A groove 15 having a substantially V-shaped cross-section where the inner surface of the groove 2 and the groove bottom 16 are in close contact with each other is provided along the longitudinal direction except for the vicinity of the air outlet 24 and the air outlet 23.
An inner panel receiving surface 18 having a step shape conforming to the surface shape of the inner panel is fitted to the mounting wall portion 13 on the upper side of the groove portion 15 so as to match the step portion P1 of the inner panel.
A roof side duct for an automobile, wherein the roof side duct is provided along a longitudinal direction of the mounting wall portion 13.