JP2008007039A - Vehicular flap structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular flap structure capable of easily forming integrally a fan shroud with a flap at low cost, and having a stopper function. <P>SOLUTION: A vent hole 6 is formed at a resin-made fan shroud 1. A flap pre-forming part 10 which is projected in a three-dimensional manner in the longitudinal direction of a vehicle from a part of the opening edge of the vent hole 6 is formed inside the vent hole 6. Then, the flap pre-forming part 10 is developed in a substantially plate shape behind the vent hole 6 backward of the vehicle to form a vehicular flap 5 having an area wider than the opening area of the vent hole 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle flap structure.

2. Description of the Related Art Conventionally, a technology for a vehicle flap structure in which a ventilation opening formed in a fan shroud is closed in a state where it is covered by its own weight, while the ventilation opening is opened by turning the vehicle rearward by a vehicle running wind is known. (See Patent Document 1).
Japanese Patent Laid-Open No. 11-115806

  However, in the conventional invention, since the flap and the fan shroud are separately formed, it takes time to fix both of them, and there is a problem that the number of parts increases and the manufacturing cost increases.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle flap structure that can easily and integrally form a fan shroud and a flap and at the same time has a stopper function. That is.

  According to the first aspect of the present invention, the vent hole is formed in the resin fan shroud, and three-dimensionally protrudes in the vehicle front-rear direction from a part of the opening edge of the vent hole inside the vent hole. After forming the flap preforming portion, the flap preforming portion is developed in a substantially plate shape at the rear of the vehicle through the ventilation port, and a flap having an area larger than the opening area of the ventilation port is formed. .

  According to the first aspect of the present invention, the vent hole is formed in the resin fan shroud, and the three-dimensional structure is formed inside the vent hole from a part of the opening edge of the vent hole in the vehicle longitudinal direction. After forming the flap preforming portion that protrudes into the fan, the flap preforming portion is deployed in a substantially plate shape at the rear of the vehicle through the vent to form a flap having an area larger than the opening area of the vent. A shroud and a flap can be integrally formed at low cost and at the same time, and a vehicle flap structure having a stopper function can be realized.

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

Example 1 will be described below.
The vehicle front-rear direction and the vehicle width direction will be described as the front-rear direction and the left-right direction.
1 is an overall perspective view showing a fan shroud according to a first embodiment of the present invention, FIG. 2 is an enlarged front view of a main part of the first embodiment, FIG. 3 is a perspective view thereof, and FIG. 4 is taken along line S4-S4 in FIG. Sectional drawing, FIGS. 5-7 is a figure explaining manufacture of a flap, FIG. 8 is a figure explaining an effect | action.

First, the overall configuration will be described.
As shown in FIG. 1, the fan shroud 1 employing the vehicle flap structure of the first embodiment is formed in a substantially box shape that opens forward and is integrally formed of synthetic resin. Fixing portions 2 each having a fixing hole 2a are formed at the upper left and lower ends, respectively.

  A fan ring portion 3 that protrudes rearward in a cylindrical shape is provided on the rear surface of the fan shroud 1, and is fixedly supported by a fan fixing portion 3 b through a plurality of fan stays 3 a inside the fan ring portion 3. The fan 4 is accommodated.

  Further, a total of three vehicle flaps 5 are provided on the side of the fan ring portion 3 so as to be spaced apart from each other in the vertical direction.

Hereinafter, since the vehicle flaps 5 have the same structure, only the vehicle flap 5 provided at the uppermost part is illustrated and described in detail.
As shown in FIGS. 2 to 4, the vehicle flap 5 is formed in a state of projecting downward from the upper edge of the opening of the rectangular ventilation opening 6 formed in the fan shroud 1.

The vehicle flap 5 is formed in a substantially flat plate shape as a whole, and has a rectangular plate-like flap body 7a having the same width and height as the width W and height H of the vent hole 6, and the flap body 7a. The triangular plate-like stoppers 7b and 7c project from the left and right via the thin connecting portions 8a and 8b, respectively, and downward from the lower side of the flap body 7a via the thin connecting portion 8c. It is composed of a protruding rectangular plate-shaped stopper portion 7d.
Further, by providing the rear surfaces of the stopper portions 7 b to 7 d in contact with the surroundings of the vent hole 6, the vent hole 6 is closed while being covered with the vehicle flap 5.
Furthermore, a thin-walled hinge portion 9 (see FIG. 4) is formed at the base end portion of the vehicle flap 5 as compared with the peripheral portion.

When manufacturing the vehicle flap configured as described above, first, as shown in FIG. 5, when the fan shroud 1 is integrally formed using a synthetic resin, the ventilation opening 6 is formed inside the ventilation opening 6. The flap preforming part 10 which protrudes three-dimensionally from the opening upper edge part is formed.
At this time, the stopper portions 7b to 7d of the flap body 7a are formed in a state of being bent forward at an angle of 90 degrees with the flap body 7a, and the adjacent stopper portions 7b to 7d are thin-walled connecting portions. 8d is connected.

  As shown in FIG. 6, the flap preforming part 10 has front and rear molds 11 and 12 for injection molding used when integrally molding the fan shroud 1. The fan shroud 1 and the flap preforming part 10 are integrally formed by forming an outer shape and filling the inside with a synthetic resin.

  Therefore, it is not necessary to add an upper and lower mold that can be slid to the front and rear molds 11 and 12, and the fan shroud 1 and the flap preforming portion 10 can be integrally molded at low cost.

  Next, as shown in FIG. 7, after cutting the connecting portion 8d between the adjacent stopper portions 7b to 7d of the flap preforming portion 10 using a tool outside the figure, behind the vent hole 6, the stopper portion 7b. -7d is refracted so as to be substantially flat with respect to the flap body 7a by the connecting portions 8a and 8b, and is developed into a substantially plate shape, thereby forming the desired vehicle flap 5.

  Therefore, after forming the flap preforming portion 10 together with the fan shroud 1, the flap preforming portion 10 is developed in a substantially plate shape behind the vent hole 6. In addition, the vehicle flap 5 having a large area can be formed.

Next, the operation will be described.
The fan shroud 1 provided with the vehicle flap 5 configured as described above has the opening side facing a heat exchanger (not shown), and fastening means (not shown) in the fixing holes 2 a of the fixing parts 2. Is inserted and fixed to a corresponding part of a heat exchanger or a radiator core support (not shown), and then mounted on the vehicle.

  When the vehicle is stopped or idling, the stoppers 7b to 7d of the vehicle flap 5 come into contact with the surroundings of the ventilation openings 6 and cover the ventilation openings 6 due to their own weight. It passes through the entire area of the radiator not shown.

  Moreover, the stopper parts 7b-7d of the flap 5 for vehicles contact | abut to the circumference | surroundings of the ventilation port 6, the rotation to the front of the flap 5 for vehicles is suppressed, and the hot air by the rear engine side is a heat exchanger outside a figure. It serves as a stopper that prevents ventilation.

  On the other hand, as shown in FIG. 8, when the vehicle traveling wind (illustrated by a broken line arrow) passing through a heat exchanger (not shown) presses the vehicle flap 5 backward while the vehicle is traveling, the vehicle flap 5 is hinged. The vehicle 9 is rotated rearward about the portion 9 to open the ventilation opening 6, and as a result, the vehicle traveling wind efficiently passes rearward.

Further, the vehicle flap 5 returns to its original position due to its own weight and closes the air vent as the vehicle speed decreases.
At this time, the flap 9 can be rotated with a small force through the hinge portion 9, and the ventilation opening 6 can be opened and closed smoothly.

Next, the effect will be described.
As described above, in the vehicle flap structure according to the first embodiment, the ventilation opening 6 is formed in the resin fan shroud 1 and the opening edge of the ventilation opening 6 is formed inside the ventilation opening 6. After forming a flap preforming portion 10 that protrudes three-dimensionally from a part of the portion in the vehicle front-rear direction, the flap preforming portion 10 is developed in a substantially plate shape behind the ventilation port 6 and the ventilation port 6 Since the vehicle flap 5 having an area larger than the opening area is formed, the fan shroud 1 and the vehicle flap 5 can be easily integrally formed at a low cost, and at the same time, a vehicle flap structure having a stopper function can be realized.

  Moreover, since the thin hinge part 9 was formed in the opening upper edge part of the ventilation port 6 compared with the other site | part, the opening / closing of the vehicle flap 5 can be performed smoothly.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.
For example, the shape of the air vent is not limited to a square shape, but may be a circle or polygonal shape including an ellipse, and the shape change of the vehicle flap, the flap preforming part, and the front and rear molds performed according to the shape of the air vent is All are within the scope of the present invention.

  Further, in the first embodiment, the flap preforming portion is formed in a state of protruding rearward of the air vent, but after being formed in a state of projecting forward, the flap is preliminarily projected rearward through the air vent, and thereafter It may be unfolded to form a flap.

  In addition, when the air vent is formed in an inclined portion that becomes lower as it goes to the rear of the fan shroud, the air vent is similarly formed even if it is formed with the vehicle flap protruding from the opening side edge of the air vent. Can be opened and closed.

It is a whole perspective view which shows the fan shroud of Example 1 of this invention. It is a principal part enlarged front view of the present Example 1. FIG. FIG. 3 is an enlarged perspective view of a main part of the first embodiment. It is sectional drawing in the S4-S4 line | wire of FIG. It is a figure explaining manufacture of a flap. It is a figure explaining manufacture of a flap. It is a figure explaining manufacture of a flap. It is a figure explaining an effect | action.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fan shroud 2a Fixing hole 2 Fixing part 3 Fan ring part 3a Fan stay 3b Fan fixing part 4 Fan 5 Vehicle flap 6 Ventilation hole 7a Flap main body 7b, 7c, 7d Stopper part 8a, 8b, 8c, 8d Connecting part 9 Hinge Part 10 Flap preforming part 11, 12, 20, 21

Claims (2)

  A vent hole is formed in the resin fan shroud, and a flap pre-molded portion that is three-dimensionally projected from a part of the opening edge of the vent hole in the vehicle front-rear direction is formed inside the vent hole, and then the flap is formed. A flap structure for a vehicle, characterized in that a preformed portion is developed in a substantially plate shape at the rear of a vehicle through a vent to form a flap having an area larger than the opening area of the vent. In the vehicle flap structure according to claim 1,
A flap structure for a vehicle, wherein a thin hinge portion is formed in a part of an opening edge portion of the vent hole as compared with a peripheral portion.

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