JPH0564079U - Vehicle roof air vane structure - Google Patents

Abstract

(57) [Summary] [Purpose] Lightweight, compact and good looking, and
(EN) Provided is a roof air vane structure for a van type vehicle that can reduce the Cd value at low cost. [Structure] A plate-like base material 4 made of resin is attached to the front end of the roof of the cab 2 over substantially the entire width. A separate air vane 5 is provided at the center of the front end of the substrate 4. The length L of the air vane 5 is in the range of 18% to 40% with respect to the width W of the van 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle roof air vane structure effective for reducing the Cd value of a van type vehicle or the like.

[0002]

[Prior Art]

 For example, when the van 1 installed on the loading platform is taller than the cab 2 as in the van type truck shown in FIG. 6, the upper front part of the van 1 receives the traveling wind directly, which reduces fuel consumption. The influential Cd value deteriorates. As a measure for improving the Cd value of such a van truck, etc., for example, as shown in FIG. 7, a dragoiler 3 is attached on the roof of the cab 2 so that the traveling wind is not directed directly to the van 1 by directing it. There is something.

[0003]

[Problems to be solved by the device]

 However, although the drag foil described above is effective in reducing the Cd value of van type trucks, it is generally heavy because it is a large molded part such as an iron plate (usually about 50 kg), and therefore the truck loading capacity is reduced. There is a problem that it must be done or the cost is high.

Therefore, an object of the present invention is to provide a roof air vane structure for a vehicle, which is light in weight, low in price, and good in appearance, as a Cd value reducing structure that replaces a drag boiler.

[0005]

[Means for Solving the Problems]

 The present invention solves the above-described problems, and a resin base material that is attached to a recessed portion that extends over substantially the entire width of the front end of the roof and provides a continuous feeling between the top edge of the windshield and the roof surface. A roof air vane structure for a vehicle, comprising a separate air vane projecting in the range of 18% to 40% of the van width at the center of the front end of the base material.

[0006]

[Action]

 According to the above-mentioned means, the running wind generated by the running of the vehicle is guided by the air vane projecting in the center of the front end of the roof and flows to the upper part of the van, so that it does not directly hit the entire surface of the van. The Cd value of a van-type vehicle is reduced.

[0007]

【Example】

 An embodiment of a vehicle roof air vane structure according to the present invention will be described with reference to FIGS.

FIG. 1A is a perspective view showing an external appearance of a front of a van truck in which a van 1 is installed on a loading platform. A front end portion of a cab 2 made of resin is substantially entirely formed into a plate shape. The base material 4 is attached to the base material 4, and a separate air vane 5 is provided at the center of the front end portion of the base material 4. As shown in FIG. 2, the base material 4 is attached so as to cover the recess 6 formed in the roof of the cab 2, and is designed so as to provide a continuous feeling between the upper end of the windshield 7 and the roof surface. .. The base material 4 is mounted on the cab roof by inserting a weld bolt (not shown) standing on the cab 2 side through the mounting hole of the base material and then tightening and fixing a nut (not shown). Alternatively, an adhesive may be used.

An air vane 5 is fixed to the center of the front end of the base material 4 described above with screws 8 (see FIG. 3). The air vane 5 is a long and slender component made of resin and has a length L, and its front wall 5a has a cross-sectional shape that changes the air flow of traveling wind obliquely upward. The range in which the air vanes 5 are mounted, that is, the length L is about 18% to 40% of the central portion of the width W of the van 1. For example, if the width W of the van 1 is set to 2200 mm, the length L of the air vane 5 is about 400 mm to 880 mm, and it is confirmed by experiments that 600 mm is the optimum length (see FIG. 4). In addition, 9 is a weather strip, 10 is a packing, and 11 is a recess for accommodating the head of the screw 8.

The operation of the vehicle roof air vane structure having the above configuration will be described below. FIG. 4 is an experimental result showing the relationship between the length L of the air vane 5 and the Cd value. The Cd value when L = 600 mm is 0.58, which is the lowest value. On the other hand, when the air vane 5 is not installed at all (L = 0 mm), the Cd value is 0.68. Therefore, it was possible to improve the Cd value by about 15% by installing the air vane of an appropriate length. I understand. Moreover, this corner vane 5 is a component that is significantly smaller and lighter (usually about 3 kg) compared to the drag foiler, and since there is a continuous feeling from the windshield 7 to the base material 4 at the front end of the roof, the windshield 7 has a large appearance, or the bead formed on the roof of the cab 2 is not visible from the front of the vehicle body. In addition, in a flat body vehicle without the van 1 (see FIG. 5), it is sufficient to attach only the base material 4 so that the appearance and design merit can be obtained, and the base material 4 and the air vane 5 are separated. By forming the body, the air vanes 5 can be attached and detached as needed, and the base material 4 can be made into a common component, resulting in compatibility.

[0011]

[Effect of the device]

 According to the above-described vehicle roof air vane structure of the present invention, it is lightweight, compact and looks good, and at the same time, it is possible to take measures to reduce the Cd value at low cost, and to improve the fuel efficiency and the commercialability of the van type vehicle. Play.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a perspective view showing an outer appearance of a front portion of a van type truck, and FIG. 1B is a schematic side view of the van type truck.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of essential parts showing an example of how the air vanes are attached.

FIG. 4 is a diagram showing a relationship between a length L of an air vane and a Cd value.

FIG. 5 is a schematic side view of a flat body vehicle.

FIG. 6 is a schematic side view of a van type truck.

FIG. 7 is a schematic side view of a van type truck to which a drag foil is attached.

[Explanation of symbols]

 1 Van 2 Cab 4 Base Material 5 Air Vane 6 Recess 7 Windshield

Front page continuation (72) Inventor Katsuji Sakai 5-33-8 Shiba, Minato-ku, Tokyo Within Mitsubishi Motors Corporation (72) Minoru Suzuki 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation Stock In the company

Claims (1)

[Scope of utility model registration request] 1. A base material made of resin, which is attached to a recess provided over substantially the entire width of the front end of the roof and provides a feeling of continuity between the upper end of the windshield and the roof surface, and a van width at the center of the front end of the base material. And a separate air vane projecting in the range of 18% to 40% of the roof air vane structure for a vehicle.