JP4452946B2 - Duct for vehicle - Google Patents

Description

  The present invention relates to a vehicle duct, and more particularly, to a vehicle duct disposed along a roof side portion in a passenger compartment of a vehicle.

  In automobiles (vehicles) produced in recent years, various measures are taken to reduce occupant injury when a side collision accident occurs as well as occupant injury reduction when a frontal collision accident occurs. For example, FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8 and shows the roof side portion 14 in the roof of the vehicle body 10 in a cross-sectional state. A roof side rail 16, which is one of the vehicle body constituting members that form the skeleton structure of the vehicle body 10, is positioned inside the body panel that is not to be mounted. In the passenger compartment 18, a molded ceiling member 30, which is one of vehicle interior members molded into a required shape, is mounted on the roof from the passenger compartment 18 side so as to cover the roof side rail 16. A space 20 having a required width is horizontally defined between the roof side rail 16 and the molded ceiling member 30 in the longitudinal direction of the vehicle body, and conditioned air used for air conditioning in the rear space of the passenger compartment 18 is provided. It is used as an installation space for a vehicle duct D for transportation and various harnesses (not shown). In addition, the code | symbol 22 in FIG. 9 is a molding member for door seals.

The conventional vehicle duct D illustrated in FIG. 9 is a blow-molded hollow cylindrical body made of a synthetic resin such as high-density polyethylene, for example, and has an original function of guiding temperature-controlled air from the air conditioner unit. Of course, it has a shock absorbing function by integrally forming shock absorbing ribs such as the inner rib 24. That is, when the occupant head H collides with the roof side portion 14 in the event of a side collision, the impact is applied to the inner rib 24 of the vehicle duct D via the molded ceiling member 30, and thereby the inner rib 24. Is buckled and the vehicle duct D is appropriately crushed so as to absorb the impact. For example, Patent Document 1 discloses an impact mitigation measure using such a vehicle duct.
JP 2000-035441 A

  Since the conventional vehicle duct D illustrated in FIG. 9 has the inner rib 24 described above, there is an advantage that it has an impact absorbing function and can suitably contribute to the reduction of injury to the occupant head H. However, it is made of synthetic resin such as high-density polyethylene and the wall thickness is relatively thin (about 2 mm), so the heat insulation performance is low. Condensation is formed on the outer surface and / or inner surface of the duct wall due to temperature difference between the inside and outside of the duct As a result, there has been a risk of causing the growth of mold and bacteria and the generation of malodors. For this reason, as illustrated in FIG. 9, the heat insulating sheet material 26 made of urethane foam material or the like is entirely wound around the outer surface of the vehicle duct D, and the occurrence of the above-described dew condensation and various causes thereof are caused. Since it is necessary to implement measures to prevent the occurrence of inconvenience, there are inherent disadvantages such as an increase in manufacturing costs due to an increase in material costs, processing costs, and mounting man-hours of the heat insulating sheet material 26.

  Further, since the above-described vehicle duct D has low sound absorption and sound insulation due to the inner wall surface of the above-described synthetic resin, the vehicle duct D reverberates without absorbing the operation noise generated in the air conditioner unit, and the air blow of the vehicle duct D concerned. There were also problems such as transmission to the exit side.

  Accordingly, it is an object of the present invention to provide a vehicle duct that can improve heat insulation performance and sound absorption performance while ensuring a passenger protection function.

In order to solve the above-mentioned problems and achieve an intended purpose, the present invention is a vehicle duct disposed along a roof side rail constituting a vehicle body on a roof side portion in a passenger compartment of a vehicle,
Formed from adiabatic material, a vehicle interior member facing the passenger compartment is provided in the roof side portion,
A first wall portion located on the vehicle interior member side and a second wall portion located on the roof side rail side, and a hollow wall member provided with a hollow heat insulation space therein,
The hollow wall member is formed by joining flanges extending in the air flow direction on both sides of the first wall portion in a direction intersecting the air flow direction to the back side of the vehicle interior member. An air flow path is defined between the duct wall between the two flange portions in the vehicle and the vehicle interior member,
The second wall portion includes a reinforcing rib that forms a part of the second wall portion and protrudes toward the first wall portion and abuts on the opposite side of the duct wall from the air flow passage. It is formed to extend in the distribution direction .

According to the vehicle duct according to the present invention, and has a structure excellent in heat insulation performance by insulation space of the hollow in the vehicle interior member and the internal formed from adiabatic material is composed of a hollow wall member provided Therefore, it is difficult for condensation due to a temperature difference between the inside and outside of the duct to occur, and there is a beneficial effect that can suitably suppress the growth of mold and bacteria and the generation of malodor caused by this. Further, since the molded ceiling member is excellent in sound absorption performance and sound insulation performance, there is an advantage that it can suitably absorb operation noise generated in the air conditioner unit.

  Next, a preferred embodiment of the vehicle duct according to the present invention will be described below with reference to the accompanying drawings. In the present embodiment, the roof side rail 16 and the molded ceiling member 30 constituting the vehicle body 10 are illustrated in the same shape as the conventional one illustrated in FIG. Therefore, the same members / parts as those already shown in FIG. 9 will be described with the same reference numerals.

  FIG. 1 is a schematic sectional view of a roof side portion 14 of a vehicle body 10 provided with a vehicle duct D according to a preferred embodiment. The vehicle duct D of the present embodiment is disposed along the roof side portion 14 in the passenger compartment 18 of the vehicle. The vehicle duct D is made of an appropriate heat insulating material and is provided in the roof side portion 14 to be provided in the passenger compartment. 18 is provided with a molded ceiling member (vehicle interior member) 30 that faces 18, and a hollow heat insulating space 49 is provided inside, and is disposed along the back side of the molded ceiling member 30, so that air flows between the molded ceiling member 30. It is comprised from the hollow wall member 40 which defines the channel | path 50. FIG.

  The molded ceiling member 30 is basically the same as the conventional one illustrated in FIG. 8, and includes a core material 32 made of, for example, urethane foam or resin felt, and the surface of the core material 32 (occupant compartment). A three-layer structure comprising a surface material 34 such as a non-woven fabric laminated on the outer surface facing 18 and a back material 36 such as a non-woven fabric laminated on the rear surface of the core material 32 (the outer surface facing the vehicle body constituting member such as the roof side rail 16). The sheet material having a three-layer structure composed of the core material 32, the front surface material 34, and the back surface material 36 is molded into the inner shape of the roof based on hot press or the like. Such a formed ceiling member 30 is lightweight because it is a laminated body made of each of the materials described above, and has an appropriate shape retaining property due to the core material 32 formed by hot pressing, while having a thickness T1 = 3. Since it is about ˜5 mm, it has excellent heat insulation performance and sound absorption performance. In addition, the core material 32 and the surface material 34, and the core material 32 and the back surface material 36 are laminated via a glass fiber layer, and those laminated directly without a glass fiber layer. is there.

  The hollow wall member 40 is a hollow body formed by using a blow molding die (not shown) based on a known blow molding technique, and is made of, for example, high-density polyethylene (PE-HD) or the like, and the meat in each part. The thickness T2 is about 2 mm. As illustrated in FIGS. 1 and 4, the hollow wall member 40 faces the first wall portion 42 that faces the molded ceiling member 30 described above and the roof side rail 16 described above. The second wall portion 44 and the third wall portion 46 and the fourth wall portion 48 formed between the end edges of the first wall portion 42 and the second wall portion 44 are generally deformed. A hollow body having a cross-sectional shape is presented.

  The first wall portion 42 has a bowl-shaped duct wall 42A that is not in contact with the above-described molded ceiling member 30, and a flange portion 42B that is integrally formed on both sides in the short direction of the duct wall 42A and extends in the longitudinal direction. , 42B, and the cross-sectional shape is a so-called hat shape. Then, as illustrated in FIG. 5, the air flow passage 50 is defined between the duct wall 42 </ b> A and the molded ceiling member 30 by joining the aforementioned flange portions 42 </ b> B and 42 </ b> B to the back surface material 36 of the molded ceiling member 30. Become so.

  The second wall portion 44 has a shape that matches the outer surface shape of the roof side rail 16 described above, and a reinforcing rib 52 extending in the longitudinal direction is formed at a portion adjacent to the back side of the first wall portion 42. Therefore, it has a shape in which bending deformation or the like hardly occurs. And the front-end | tip of these reinforcement ribs 52 is contact | abutting to the back side of the 1st wall part 42, and supports the duct wall 42A of the 1st wall part 42 from a back side.

  As illustrated in FIGS. 2 to 4, the third wall portion 46 and the fourth wall portion 48 are formed on the inside of the convex wall portion 54 and the hollow wall member 40 that swell in a semicircular arc shape toward the outside of the hollow wall member 40. The concave wall portions 56 that are recessed in a semicircular arc shape are alternately provided in the longitudinal direction of the vehicle duct D to form a corrugated plate shape. Among these, the 3rd wall part 46 is set to the curvature radius R1 = about 7 mm of the convex wall part 54 and the concave wall part 56, and the pitch P1 = about 14 mm. The fourth wall portion 48 is set to have a radius of curvature R2 of the convex wall portion 54 and the concave wall portion 56 of about 9 mm and a pitch P2 of about 18 mm. Accordingly, the third wall portion 46 and the fourth wall portion 48 are located between the molded ceiling member 30 and the roof side rail 16, as is apparent from FIG. When the occupant head H collides, it functions as an impact absorbing rib 60 that buckles and deforms by impact force applied through the molded ceiling member 30.

  The shock absorbing rib 60 includes (a) the material of the hollow wall member 40, (b) the thickness of the convex wall portion 54 and the concave wall portion 56, and (c) the curvature radii R1 and R2 of the convex wall portion 54 and the concave wall portion 56. In consideration of various conditions such as the pitches P1 and P2, the head injury value HIC (d) <1000 is set to be satisfied.

  As illustrated in FIG. 5, the hollow wall member 40 formed as described above is formed by using the adhesive 58 such as hot melt to form the flange portions 42 </ b> B and 42 </ b> B of the first wall portion 42 of the molded ceiling member 30. By bonding to the required position on the back surface, the molded ceiling member 30 is bonded and fixed. Therefore, the vehicle duct D defining the air flow passage 50 is formed by the molded ceiling member 30 and the first wall portion 42 of the hollow wall member 40 bonded to each other. The formed vehicle duct D is attached to the roof of the vehicle body 10 from the passenger compartment 18 by attaching the molded ceiling member 30 in the space 20 inside the roof side portion 14 as illustrated in FIG. It is arranged adjacent to the roof side rail 16.

  The vehicle duct D of the present embodiment configured as described above has the air flow passage 50 formed from the molded ceiling member 30 made of an appropriate heat insulating material and the hollow wall member 40 provided with a hollow heat insulating space 49 inside. Due to the definition, it has a structure with excellent heat insulation performance. Therefore, it is difficult for condensation to occur due to a temperature difference between the inside and outside of the duct, so that it is possible to suitably suppress the growth of mold, bacteria, bad odor and the like due to this. Further, since the molded ceiling member 30 facing the air flow passage 50 is excellent in sound absorption performance and sound insulation performance, it suitably absorbs driving noise generated in an air conditioner unit (not shown), and the vehicle duct D The operating noise transmitted to the air outlet side can be reduced.

  FIG. 7 is a schematic cross-sectional view of the roof side portion 14 of the vehicle body 10 provided with the vehicle duct D according to the modified example. The vehicle duct D of this modified example is based on the premise that an air flow passage 50 is defined by a molded ceiling member 30 made of an appropriate heat insulating material and a hollow wall member 40 provided with a hollow heat insulating space 49 inside. As described above, the form of the hollow wall member 40 is changed as compared with the above-described embodiment. That is, the impact absorbing performance is improved by additionally forming the shock absorbing rib 60 that contacts the back surface of the molded ceiling member 30 at the central portion of the duct wall 42A in the first wall portion 42 of the hollow wall member 40. At the same time, it becomes possible to prevent deformation of the molded ceiling member 30 due to the pressure difference between the inside and outside of the duct.

  In addition, the cross-sectional shape of the hollow wall member 40 is not limited to the shape illustrated in the above-described embodiment, and the air flow passage 50 can be suitably insulated by defining a hollow heat insulation space 49 inside. Any other cross-sectional shape may be used. Further, the cross-sectional shape of the hollow wall member 40 may be a shape that deforms regularly or irregularly along the longitudinal direction of the vehicle duct D.

  Further, the shock absorbing ribs 60 formed on the third wall portion 46 and the fourth wall portion 48 are not limited to those having the corrugated shape described above, and the head injury value HIC (d) <1000. Other shapes may be used as long as the conditions can be satisfied. Further, the shock absorbing rib 60 does not need to be formed on the entire third wall portion 46 and the fourth wall portion 48 over the entire length of the vehicle duct D, but only on a portion where the occupant head H may collide. You may make it provide. Further, the shock absorbing rib 60 may be provided only on one of the third wall portion 46 and the fourth wall portion 48.

  On the other hand, in the above-described embodiments and modified examples, the molded ceiling member is exemplified as the vehicle interior member 30, but the vehicle interior member 30 is not limited to this, for example, the roof along the side edge of the molded ceiling member. The roof side garnish disposed in the side portion 14 and the pillar garnish disposed from the roof side portion 14 to the pillar portion of the vehicle body 10 are disposed at a portion where the occupant head H may collide. All vehicle interior members are targeted.

  The vehicle duct according to the present invention is disposed along the roof side portion in the passenger compartment of the vehicle, and can be implemented in various types of automobiles such as passenger cars.

It is a schematic sectional drawing of the roof side part of the vehicle body which arrange | positioned the vehicle duct which concerns on a suitable Example. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a fragmentary perspective view of the duct for vehicles. It is explanatory sectional drawing which showed the state which joins the hollow wall member shape | molded separately to the shaping | molding ceiling member. It is explanatory sectional drawing which showed the state which assembles the shaping | molding ceiling member which provided the duct for vehicles of a present Example to the roof of a vehicle body. It is a schematic sectional drawing of the roof side part of the vehicle body which arrange | positioned the vehicle duct which concerns on the example of a change. It is the schematic explanatory drawing which showed the passenger compartment of the motor vehicle. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8, showing a state in which a blow molded vehicle duct is disposed in a space formed in the roof side portion.

Explanation of symbols

14 Roof side
16 Roof side rail 30 Molded ceiling member (vehicle interior member)
40 Hollow wall member
42 First wall
42A duct wall
42B Isobe
44 Second wall
46 3rd wall
48 4th wall part 49 Thermal insulation space 50 Air flow path 52 Reinforcement rib
54 Wall
56 Wall
60 impact absorbing ribs D vehicular duct

Claims (2)

A vehicle duct (D) disposed along the roof side rail (16) constituting the vehicle body on the roof side portion (14) in the passenger compartment of the vehicle,
Formed from adiabatic material, the roof side portion and the vehicle interior member facing the passenger compartment provided (14) (30),
It has a first wall portion (42) located on the vehicle interior member (30) side and a second wall portion (44) located on the roof side rail (16) side, and has a hollow heat insulating space ( 49) provided with a hollow wall member (40) ,
The hollow wall member (40) has flanges (42B, 42B) extending in the air flow direction on both sides of the first wall portion (42) in a direction intersecting the air flow direction, and the vehicle interior member (30 ) On the back side of the first wall portion (42), the air flow path (42A) between the two flange portions (42B, 42B) and the vehicle interior member (30) ( 50)
The second wall portion (44) constitutes a part of the second wall portion (44), protrudes toward the first wall portion (42), and the air flow path (42A) of the duct wall (42A). A vehicular duct , wherein a reinforcing rib (52) that abuts on the opposite side to 50) extends in the air flow direction . The hollow wall member (40 ) is formed between end edges of the first wall portion (42) and the second wall portion (44), and is formed between the vehicle interior member (30) and the roof side rail (16). A third wall portion (46) and a fourth wall portion (48) positioned between them are provided, and shock absorbing ribs (60) are formed on the third wall portion (46) and the fourth wall portion (48). ,
The shock absorbing rib (60) bulges out in a semicircular arc shape outside the hollow wall member (40) and extends in a facing direction between the vehicle interior member (30) and the roof side rail (16) ( 54), and a wall portion (56) that bulges in a semicircular arc shape to the inside of the hollow wall member (40) and extends in the opposing direction of the vehicle interior member (30) and the roof side rail (16), The vehicle duct according to claim 1, wherein the vehicular duct is alternately connected in the air flow direction to form a corrugated plate shape .

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