JP2014198509A - Vehicle grill shutter structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle grill shutter structure capable of achieving both of fuel economy performance and repairability performance.SOLUTION: A grill shutter unit 30 of a vehicle V including the shutter unit 31 provided in a vehicle body rearward of a traveling wind introduction port provided on a front end of the vehicle body and including shutter members 35b to 35e, comprises a traveling wind guide member 32 extending to a forward side of the vehicle body from an outer peripheral edge of the shutter unit 31. The traveling wind guide member 32 includes: a hard synthetic resin guide frame part 37 provided in the vehicle body rearward of a bumper reinforcement provided on the front end of the vehicle body; and a soft synthetic resin seal part 38 continuous forward to a front end of this guide frame part 37 and having flexibility. At a time of crash of the vehicle V, the shutter unit 31 and the guide frame part 37 are protected from being damaged although the bumper reinforcement 3 moving backward deforms the seal part 38.

Description

  The present invention relates to a grill shutter structure for a vehicle, and more particularly to a grill shutter structure for a vehicle including a shutter unit having a shutter member that can be opened and closed, and a traveling wind guide member that extends forward from the outer peripheral edge of the shutter unit to the vehicle body.

Conventionally, a grille shutter unit capable of adjusting the amount of traveling air introduced into the engine room via a traveling air inlet such as a front grill provided at the front end of the vehicle in order to improve combustion failure due to overcooling of the engine, radiator, etc. It has been known.
The traveling wind introduced into the engine room is a factor that causes air turbulence around the vehicle by flowing backward through the tunnel part of the floor panel when the vehicle is traveling. In order to avoid a decrease in the fuel efficiency of the vehicle, there is a growing tendency to mount a grill shutter unit that can adjust the amount of travel air introduced into the engine room.

The grille shutter unit includes a shutter unit having a plurality of shutter members that can open and close the traveling wind inlet, a drive motor that can open and close the plurality of shutter members, and the like.
The movable grill shutter for a vehicle of Patent Document 1 is integrally installed at the opening portion of the front grill, and is provided with a left first fin (left shutter member) having a first support shaft and a second right side having a second support shaft. A fin (right shutter member), a first output shaft that opens and closes the first fin, a second output shaft that opens and closes the second fin, and an actuator disposed between the first and second fins. The first and second universal joints are provided between the first and second output shafts and the first and second support shafts, respectively.

In addition, to improve the layout of the grill shutter unit and the design freedom in the engine room, the grill shutter unit is mounted on the front wall of the shroud member that supports the radiator, condenser, etc., and formed on the grill shutter unit and the bumper face. Also known is a structure in which a traveling wind inlet such as a front grill is connected by a duct member.
The duct structure at the front part of the vehicle in Patent Document 2 includes a front grill formed on a bumper face and a traveling wind inlet formed on the lower side of the front grill. These front grill, traveling wind inlet and radiator core A duct device (grill shutter unit) attached to the radiator core support is provided between the support and the radiator supported by the shroud member, and this duct device transmits the traveling wind to the radiator from the front grill and the traveling wind inlet. A plurality of duct parts to be supplied and a shutter for passing or blocking the traveling wind in each duct part are provided.

Usually, a substantially rectangular frame-shaped shroud member is formed of a hard synthetic resin material containing glass fiber, etc., because it is necessary to reduce the weight while securing the rigidity as a radiator and a capacitor and the strength as a vehicle body component member. It is assembled to the vehicle body via a mounting bracket provided at the front end portion of the pair of left and right front side frames.
Crash cans extending forward are respectively installed at the front ends of the pair of left and right front side frames. A bumper reinforcement extending in the vehicle width direction is suspended at the front ends of these crash cans, and the front periphery thereof is covered with a bumper face. Therefore, during a normal vehicle collision, the crash can provided at the front end of the front side frame is crushed to absorb the collision load and ensure the safety of the occupant.

JP 2012-035829 A JP 2004-299522 A

The grill shutter unit of Patent Literature 2 is superior to the grill shutter unit of Patent Literature 1 in terms of layout and design freedom. In addition, the grill shutter unit of Patent Document 2 is separated from the traveling wind introduction port by a predetermined distance behind the vehicle wind introduction port, so that in the case of a light vehicle collision, the bumper reinforcement and the grill shutter unit Breakage of the grill shutter unit due to interference can be avoided.
However, in the case of a heavy collision with a large retraction amount of the bumper reinforcement, the separation distance between the bumper reinforcement and the front end of the front side frame approaches as the crash can compresses, and the grille shutter unit is damaged by the collision load. There is a risk of doing.
In the grill shutter unit of Patent Document 2, since the grill shutter unit including the shutter unit and the duct portion is configured as an integrally formed body, the grill shutter can be used even when a part of the front side portion of the duct portion is damaged. It becomes necessary to replace the entire unit, resulting in a problem that repair / repair costs are increased and repairability performance is degraded.

Further, in the grill shutter unit of Patent Document 2, a shutter that can be opened and closed is disposed at the rear of the vehicle body from the traveling wind introduction port, and a duct portion that extends in the front-rear direction for flowing the traveling wind from the traveling wind introduction port to the shutter unit. Therefore, the traveling wind flows into the engine room from the gap between the front end of the duct portion and the traveling wind introduction port, and there is a risk of causing a combustion failure due to overcooling and a reduction in fuel consumption performance due to an increase in traveling resistance.
As a design condition, it is conceivable that the duct tip and the running wind inlet are brought into close contact with each other, but in that case, the grille shutter unit is easily damaged by interference with the bumper reinforcement even in a light collision. There is also a risk of becoming.

  An object of the present invention is to provide a grill shutter structure for a vehicle that can achieve both fuel efficiency and repairability.

  The vehicle grill shutter structure according to claim 1 is a vehicle grill shutter structure provided with a shutter unit disposed at the rear of the vehicle body and openable and closable with respect to the traveling wind introduction port provided at the front end of the vehicle body. A rigid synthetic resin frame provided with a traveling wind guide member extending from the outer peripheral edge of the shutter unit to the front of the vehicle body, the traveling wind guide member being disposed at the rear of the vehicle body relative to a bumper reinforcement provided at a front end of the vehicle body And a seal portion made of a soft synthetic resin that is continuous from the front end of the frame portion and has flexibility.

  In this vehicle grill shutter structure, since the traveling wind guide member extending from the outer peripheral edge of the shutter unit to the front of the vehicle body is provided, the shutter unit can be used even in a layout in which the shutter unit is disposed rearward of the traveling wind inlet. The amount of traveling air introduced into the engine room can be adjusted while suppressing the traveling air introduced into the engine room without passing through the engine.

  According to a second aspect of the present invention, in the first aspect of the invention, the traveling wind guide member is configured as an integral different resin molded body, and the frame portion is configured to be attachable to an outer peripheral edge portion of the shutter unit. It is characterized by.

  The invention of claim 3 is the invention of claim 1 or 2, wherein the vehicle includes a shroud member held by the bumper reinforcement, the shutter unit is disposed in the vicinity of the front side of the shroud member, and the shroud member It is characterized by being fixed to the front wall.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the lower end portion of the bumper reinforcement is formed close to the upper surface of the upper wall portion of the seal portion of the traveling wind guide member. It is characterized by having.

  The invention of claim 5 is the invention according to any one of claims 1 to 4, wherein the vehicle includes a leg-pasting member provided at a lower part of the front end of the vehicle body, and the leg-pasting member is a seal portion of the traveling wind guide member. It is characterized by being formed in contact with the lower surface of the lower wall portion.

According to the first aspect of the present invention, since the traveling wind introduced into the engine room can be suppressed without passing through the shutter unit, it is possible to avoid a decrease in fuel efficiency due to overcooling or increased traveling resistance.
In addition, the shutter unit and the frame part are arranged behind the bumper reinforcement, and the flexible seal part is provided at the front end of the frame part. Although the seal portion is deformed, the shutter unit and the frame portion can be protected from damage. Further, when the collision load is large and the frame portion is damaged, it is only necessary to replace the traveling wind guide member, and the repairability performance can be improved.

  According to the second aspect of the present invention, since the traveling wind guide member having a high coupling force between the frame portion and the seal portion can be manufactured in one molding process, the productivity of the traveling wind guide member can be increased. Further, since the workability of assembling the traveling wind guide member can be improved, the repairability performance can be further improved.

  According to the third aspect of the present invention, the shroud member moves backward in synchronization with the backward movement of the bumper reinforcement at the time of a normal collision of the vehicle, so that the traveling wind guide member can be further prevented from being damaged. After the shutter unit and the shroud member are assembled in advance to the bumper reinforcement as the assembly body, the traveling wind guide member can be assembled to the shutter unit in a later process, so that the assembling workability can be further improved.

  According to the fourth aspect of the present invention, the seal portion of the traveling wind guide member is pressed against the lower end of the bumper reinforcement by the traveling wind pressure blocked by the shutter, so that it enters the engine room without passing through the shutter unit. Introduced traveling wind can be prevented, and deterioration in fuel efficiency due to overcooling and increased traveling resistance can be reliably avoided.

  According to the invention of claim 5, since the seal portion of the traveling wind guide member is pressed against the leg fixing member by the traveling wind pressure blocked by the shutter member, it is introduced into the engine room without passing through the shutter unit. Driving wind can be prevented, and deterioration in fuel efficiency due to overcooling and increased driving resistance can be reliably avoided.

It is the perspective view which looked at the vehicle provided with the grille shutter unit concerning Example 1 of the present invention from the front upper part. It is a front view of FIG. It is the III-III sectional view taken on the line of FIG. It is a figure which shows the state which removed the bumper face from FIG. FIG. 5 is a front view of FIG. 4. FIG. 5 is a plan view of FIG. 4. It is the perspective view which looked at the state which removed the bumper rain from Drawing 4 from the front lower part. It is a figure which shows the state which removed the bumper rain from FIG. It is a perspective view of the shroud member which assembled | attached the grill shutter unit. It is a perspective view of a grill shutter unit. FIG. 9 is an exploded perspective view of FIG. 8. It is a principal part longitudinal cross-sectional view when a shutter member drives closed. It is a principal part longitudinal cross-sectional view when a shutter member drives open.

  Hereinafter, modes for carrying out the present invention will be described based on examples. In the figure, the arrow F direction is described as the front side of the vehicle body, and the arrow L direction is described as the left side of the vehicle body.

Embodiment 1 of the present invention will be described below with reference to FIGS.
The vehicle V to which the present invention is applied includes a pair of left and right front side frames 1 extending in the front-rear direction, a pair of left and right crash cans 2 fixed to the front ends of the pair of left and right front side frames 1, and these A bumper reinforcement 3 (hereinafter abbreviated as a bumper rain 3) connected to the front ends of the left and right crash cans 2 and a rectangular frame-shaped shroud member 20 fixed to the bumper rain 3; A grill shutter unit 30 fixed to the shroud member 20, a bumper face 4 disposed at the front end of the vehicle body, and the like are provided.

First, main body components of the vehicle V will be described.
As shown in FIGS. 1, 3, 4, and 6, the pair of left and right front side frames 1 are disposed at a predetermined distance in the vehicle width direction, and the front ends of the pair of left and right front side frames 1 are arranged. The flanges 1a projecting vertically and horizontally are welded to each other.
The pair of left and right crush cans 2 are formed in a rectangular tube shape, and flanges 2a projecting in the vertical and horizontal directions are welded to the rear ends of the crush cans 2 and are connected to the flanges 1a by a plurality of bolts b1, respectively. These crash cans 2 are sized and shaped to absorb the collision energy by collapsing while being compressed and deformed by a collision load acting from the front via the bumper rain 3 in the event of a vehicle collision, and to achieve the desired energy absorption function. It is configured.

As shown in FIGS. 3 to 6, 12, and 13, a bumper rain 3 is connected to the front ends of the pair of left and right crash cans 2, and the bumper rain 3 is closed in a front-convex curved shape in the left-right direction. It is configured in a cross-sectional shape. The bumper rain 3 has a base plate 6 having a substantially hat-shaped cross section and a plate-shaped closing plate 7.
The base plate 6 includes a main body portion 6a having a substantially U-shaped cross section, an upper flange portion 6b extending upward from the upper end portion of the main body portion 6a, and an upper horizontal portion extending rearward by bending from the upper end portion of the upper flange portion 6b. The wall portion 6c, a lower flange portion 6d extending downward from the lower end portion of the main body portion 6a, and a lower horizontal wall portion 6e extending backward from the lower end portion of the lower flange portion 6d are provided.
The rear wall portion of the main body portion 6a is connected to the front end portions of the pair of left and right crash cans 2.
As shown in FIGS. 4 and 6 to 8, in order to support the shroud member 20 on the bumper rain 3 at a predetermined distance between the rear side of the bumper rain 3 and between the pair of left and right crash cans 2. A pair of left and right mounting brackets 25 are joined together. The pair of left and right mounting brackets 25 extends rearward from the rear wall portion of the main body 6a, and a pair of upper and lower bolt holes h6 are respectively provided in the side wall portions.

As shown in FIGS. 3, 12, and 13, the closing plate 7 is welded to the upper flange portion 6 b and the lower flange portion 6 d, and forms a closed cross-sectional portion that extends in the vehicle width direction in cooperation with the base plate 6. To do. On the front side of the closing plate 7, an impact absorber 8 formed of a foamed resin molded body such as urethane is disposed. The lower wall portion 8a of the shock absorber 8 is disposed at substantially the same height so as to be substantially flush with the lower horizontal wall portion 6e in the front-rear direction.
The shock absorber 8 absorbs collision energy by compressing and deforming due to a collision load applied from the front via the bumper face 4 and the bumper rain 3 at the time of a vehicle collision, and can achieve an intended energy absorption function. It is configured.

  3 and 4, a pair of left and right front subframes 9 extending in the front-rear direction are provided below the pair of left and right front side frames 1, and the front ends of the pair of left and right front subframes 9 are provided. A front cross member 10 that extends and connects in the vehicle width direction so as to span each other is disposed. The pair of left and right front sub-frames 9 are connected to a pair of left and right extension portions 11 in the form of a rectangular tube extending forward at positions corresponding to the pair of left and right crash cans 2 in plan view, respectively. A leg wiper member 12 extending in the vehicle width direction is attached to the front ends of the pair of extension portions 11.

  The leg displacing member 12 is a mechanism that protects the pedestrian by paying the pedestrian's leg when in contact with the pedestrian, and is a synthetic resin molded body having a substantially front convex curve that moves to the rear side toward the outside in the vehicle width direction. The left end portion and the right end portion that are formed by the above and are extended to the rear side are respectively fixed to the lower ends of the pair of extension portions 11. As shown in FIGS. 3 to 9, the leg member 12 includes a plate portion 12 a formed in a substantially horizontal shape at the center in the vehicle width direction and in the vicinity thereof, and a front side of the plate portion 12 a and a center portion in the vehicle width direction. Are provided with a V-shaped groove 12b having a substantially V-shaped cross section formed so as to extend in the vehicle width direction, and a plurality of lattice-shaped rib portions 12c formed on the lower surface (rear surface) of the leg fixing member 12.

The leg disposing member 12 is disposed at substantially the same height as the front cross member 10 in a front view, and is formed such that the rear end portion of the plate portion 12a is slightly lower than the front portion. It is arrange | positioned so that the front wall part of the cross member 10 may be opposed.
The V-shaped groove 12b collects water that flows down from shutter members 35a to 35e, which will be described later, and stays on the plate portion 12a, and collects water collected from a plurality of drain holes 12f formed in the bottom. Discharging to the (lower body).

  As shown in FIGS. 1 to 3, the bumper face 4 is disposed in front of the bumper rain 3, the shock absorber 8, the leg-pasting member 12, and the like, and is external to the vehicle V by a hard synthetic resin material (for example, PP). A surface is formed, and the bumper rain 3 and the grill shutter unit 30 are covered. The bumper face 4 includes a front grille 4a penetrating front and rear so as to face the shock absorber 8 at a central portion in the vehicle width direction, a front and rear bumper grille 4b provided below the front grille 4a, and left and right 1 A pair of headlight mounting openings 4c and a pair of left and right turn signal mounting openings 4d are provided.

As shown in FIG. 2, the bumper grill 4b is formed in a substantially flat shape having substantially the same vehicle width direction length as the front grill 4a in front view and extending in the vehicle width direction. The lower edge portion of the bumper grill 4 b is set at a height position substantially the same as the front wall portion of the front cross member 10.
In the present embodiment, the lower wall portion 8a and the lower horizontal wall portion 6e correspond to the upper outer peripheral wall surface of the ventilation introduction port of the grill shutter unit 30, and the upper surface of the lower edge portion of the bumper grill 4b and the front portion of the plate portion 12a. This corresponds to the lower outer peripheral wall surface of the ventilation introduction port of the grill shutter unit 30.

Next, the shroud member 20 will be described.
As shown in FIGS. 1 to 9 and 11, the shroud member 20 is arranged in a substantially vertical posture at a rear position of the bumper rain 3, and a radiator 15, a condenser (not shown) and the like are attached. The shroud member 20 is formed of a hard synthetic resin material, and extends in the left-right direction to support the upper portion of the radiator 15, the lower member 22 that extends in the left-right direction to support the lower portion of the radiator 15, and the upper member 21. And a pair of left and right stays for connecting the middle part of the upper member 21 and the middle part of the lower member 22 in the vertical direction. The unit 24 is provided and is configured as an integrally molded body in a substantially rectangular frame shape when viewed from the front.

As shown in FIGS. 1 to 9 and 11, the upper member 21 has a substantially L-shaped cross section, and includes a front wall portion 21 a and an upper wall portion 21 b extending rearward from the upper end of the front wall portion 21 a. ing.
A pair of left and right support openings (not shown) for supporting the upper portion of the radiator 15 are provided at the left end portion and the right end portion of the upper wall portion 21b. As shown in FIGS. 3, 9, and 11 to 13, the lower member 22 is disposed in the vicinity of the front side of the front cross member 10, and rearward from the upper front wall portion 22 a and the lower end of the upper front wall portion 22 a. A middle step portion 22b extending horizontally, a lower front wall portion 22c extending vertically downward from the rear end of the middle step portion 22b, and a lower wall portion 22d extending rearward from the lower end of the lower front wall portion 22c. Yes.

  As shown in FIG. 11, a pair of left and right bolt holes h1 for attaching the grill shutter unit 30 are formed at positions near the left end and right end of the lower front wall portion 22c. The lower wall portion 22d is disposed on the rear end portion of the plate portion 12a formed at a low height, and a pair of left and right support openings for supporting the lower portion of the radiator 15 are provided at the left end portion and the right end portion thereof. 22e are provided.

The pair of left and right side members 23 are formed in a substantially L-shaped cross section, and each includes a front wall portion 23a and a lateral wall portion 23b extending rearward from the outer end in the vehicle width direction of the front wall portion 23a.
Since the pair of left and right side members 23 are symmetrical structures, the left side member 23 will be mainly described.
A pair of upper and lower bolt holes h2 for supporting the shroud member 20 on the bumper rain 3 and a grill shutter unit 30 at a position below the pair of upper and lower bolt holes h2 are attached to the middle step of the front wall portion 23a. A pair of upper and lower bolt holes h3 are formed. A bolt hole h6 (see FIGS. 7 and 8) of the mounting bracket 25 previously joined to the bumper rain 3 and a pair of upper and lower bolt holes h2 (see FIGS. 9 and 11) of the side member 23 are connected to a bolt b4 (FIG. 4). , See FIG. 5), the shroud member 20 is fixed to the bumper rain 3. Thereby, since the shroud member 20 is integrally connected to the bumper rain 3, when the bumper rain 3 moves backward, the shroud member 20 moves backward synchronously with the bumper rain 3.

Next, the grill shutter unit 30 will be described.
The grill shutter unit 30 allows traveling wind entering the engine room when the vehicle V is in a predetermined driving state, and travels into the engine room when the vehicle V is in other states (for example, a state before warm-up). This is a travel air volume adjusting mechanism that restricts wind.
As shown in FIG. 3, the grill shutter unit 30 is disposed so as to overlap a part of the lower portion of the front grill 4a and the bumper grill 4b at a position above the plate portion 12a of the leg disposing member 12 in a front view. Located below the bumper rain 3. As shown in FIG. 11, the grill shutter unit 30 includes a pair of left and right bolt holes h1 formed in the lower front wall portion 22c of the shroud member 20 and an upper and lower portion 1 formed in the pair of left and right front wall portions 23a. It is attached to the pair of bolt holes h3 via bolts b2 and b3.

As shown in FIGS. 3 to 13, the grille shutter unit 30 is configured in a rectangular tube shape with a shutter unit 31 and a traveling wind guide member 32 that can be attached to the outer peripheral edge of the shutter unit 31. .
The shutter unit 31 is equipped with a rectangular tube-shaped unit frame 33, a plurality of pivot shafts 34a to 34e that are pivotally supported by the unit frame portion 33 and extend in the left-right direction, and the plurality of pivot shafts 34a to 34e, respectively. And a plurality of shutter members 35a to 35e that can be opened and closed, a link mechanism (not shown) that opens and closes the plurality of shutter members 35a to 35e, and an opening / closing drive means 36 including an actuator.

As shown in FIGS. 8 to 11, the unit frame portion 33 is formed of a hard synthetic resin material (for example, PP), an upper wall portion 41, a lower wall portion 42, a pair of left and right side wall portions 43, a vehicle A shaft support portion 44 that can pivotally support a plurality of rotating shafts 34 a to 34 e while connecting the upper wall portion 41 and the lower wall portion 42 at the intermediate position in the width direction is provided.
The lower wall portion 42 is disposed at a lower position than the middle step portion 22b, and is recessed downward from a unit-side concave portion 45 that is recessed downward in the center portion in the vehicle width direction, and a position near the rear end and left and right ends of the lower wall portion 42. A pair of left and right mounting flange portions 46 are provided.

The unit-side recess 45 is set to a length that is approximately half the vehicle width direction length of the lower wall portion 42 so as to correspond to the V-shaped groove 12b in plan view, and is higher than the other left and right side portions. It is formed so that the position is lowered.
Bolt holes h4 for attaching the shutter unit 31 to the shroud member 20 are formed in the pair of left and right mounting flange portions 46 at positions corresponding to the pair of left and right bolt holes h1 formed in the lower front wall portion 22c. Has been.

As shown in FIGS. 8 to 11, the pair of left and right side wall portions 43 includes a pair of left and right mounting flange portions 48 projecting outward from the rear end portion in the vehicle width direction, and a pair of left and right mounting flange portions 48. A pair of upper and lower bolt portions 47 extending forward from the upper and lower portions of the head are provided. The pair of left and right mounting flange portions 48 are formed with a pair of upper and lower bolt holes h5 for mounting the shutter unit 31 to the shroud member 20 at positions corresponding to the upper and lower pair of bolt holes h3.
On the right side wall 43, an opening / closing driving means 36 capable of opening / closing the plurality of shutter members 35a to 35e is mounted.

As shown in FIGS. 12 and 13, the plurality of rotating shafts 34 a to 34 e are respectively connected to the central portions in the vertical direction of the plurality of shutter members 35 a to 35 e, and are rotated about the axis by the link mechanism. The plurality of shutter members 35a to 35e are rotated synchronously.
Of the plurality of shutter members 35a to 35e, the lowermost shutter member 35e has an upper edge portion formed substantially linearly so as to correspond to the unit-side recess 45, and a lower edge portion recessed downward in the vehicle width direction central portion. The vertical width of the central portion in the vehicle width direction is formed so as to be wider than the vertical width of the other portions. The shutter members 35a to 35d are uniformly formed in a rectangular shape.

Next, the traveling wind guide member 32 will be described.
As shown in FIGS. 8 to 13, the traveling wind guide member 32 integrally includes a rectangular tube-shaped guide frame portion 37 and a rectangular tube-shaped seal portion 38 that extends forward from the front end of the guide frame portion 37. I have.
The guide frame portion 37 is formed of a hard synthetic resin material (for example, PP), and the seal portion 38 is formed of a flexible thermoplastic elastomer (TPE: for example, silicon rubber) that has flexibility. .
In this embodiment, a hard synthetic resin material is injected into a primary molding space formed in a pair of molds to form a guide frame portion 37, and a primary structure in which the guide frame portion 37 is continuously arranged. The one-piece running wind guide member 32 is manufactured by a different resin molding method in which a thermoplastic elastomer is injected into a secondary molding space in which the molding space is expanded to mold the seal portion 38.
As a result, the traveling wind guide member 32 made of two types of synthetic resins of different materials is manufactured in a single molding process, and the engagement force between the guide frame portion 37 and the seal portion 38 is increased.

As shown in FIGS. 8 to 13, the guide frame portion 37 is formed so as to be able to be fitted onto the front outer peripheral portion of the unit frame portion 33 by setting the inner peripheral size slightly larger than the unit frame portion 33. A part 51, a lower wall part 52, a pair of left and right side wall parts 53, a plurality of engaging parts 54, two pairs of upper and lower pairs of leg parts 56, and the like are integrally provided.
The upper wall portion 51 is formed in a front convex curved shape so that the front end shape thereof follows the rear end portion of the bumper rain 3 in a plan view, and is disposed on the rear side of the rear end portion of the bumper rain 3.

  The lower wall portion 52 is provided with a guide-side concave portion 55 that is recessed downward in the center portion in the vehicle width direction so as to correspond to the unit-side concave portion 45, and the height position is lower than the other left-side portion and right-side portion. It is formed to become. On the lower surface of the upper wall portion 51 and the upper surface of the lower wall portion 52, a plurality of engaging portions 54 having a substantially L-shaped cross section that can be engaged with the front portion of the unit frame portion 33 from the inside are formed. Thereby, when the traveling wind guide member 32 is assembled to the shutter unit 31 from the front, the rear inner peripheral portion of the guide frame portion 37 is fitted on the front end portion of the outer peripheral portion of the unit frame portion 33, and the plurality of engaging portions 54 are engaged. Engages with the front end portion of the inner peripheral portion of the unit frame portion 33.

  As shown in FIGS. 8 to 11, the pair of left and right side wall portions 53 of the guide frame portion 37 are a pair of upper and lower legs slightly extending rearward from the upper end portion and the lower end portion thereof and projecting outward in the vehicle width direction. Each part 56 is provided. Bolt holes h7 for fixing the traveling wind guide member 32 to the shutter unit 31 are formed in the leg portions 56 at positions corresponding to the respective bolt portions 47 of the unit frame portion 33.

  As shown in FIGS. 8 to 13, the seal portion 38 is integrally formed so as to be continuous forward from the front end of the guide frame portion 37. The seal portion 38 is formed from an upper seal portion 61, a lower seal portion 62 (lower wall portion), a pair of left and right side seal portions 63, and a front end portion of the pair of left and right side seal portions 63. A pair of left and right projecting seal portions 64 projecting outward in the width direction is provided.

The upper seal portion 61 has an upper center seal portion 66 extending to a position near the lower wall portion 8a of the shock absorber 8 in the vehicle width direction center portion, and a left side portion and a right side portion of the upper center seal portion 66 are notched rearward. And a pair of left and right cutouts 67.
The upper center seal portion 66 is formed so that the front portion moves upward rather than the rear portion, and when assembled (when the vehicle V is stopped), the upper surface of the upper center seal portion 66 is the lower wall portion 8a of the shock absorber 8. And the lower horizontal wall portion 6e of the bumper rain 3 are arranged close to each other so as to form a gap S (see FIG. 13). The upper central seal portion 66 is elastically deformed upward as the pressure in the lower space of the upper central seal portion 66 rises due to traveling wind (arrow) that is blocked when the shutter members 35a to 35e are opened and closed. It is configured to be possible (see FIG. 12).

  As shown in FIG. 12, the pair of left and right cutout portions 67 are formed so as to cut out from the front end of the upper seal portion 61 toward the vicinity of the rear end, and when the plurality of shutter members 35a to 35e are opened and closed. The front end of the upper center seal portion 66 is configured to be pressed in close contact with the lower wall portion 8a of the shock absorber 8 and the lower horizontal wall portion 6e of the bumper rain 3.

  As shown in FIGS. 12 and 13, the lower seal portion 62 is formed in an inclined shape so as to move downward toward the front side, and the front end lower surface extends over the entire region in the vehicle width direction. It is comprised so that it may be pressed on the upper surface of 12a in close contact. The lower seal portion 62 is provided with a seal-side recess 65 that is recessed downward in the center portion in the vehicle width direction corresponding to the guide-side recess 55, and is lower in height than the other left and right portions. It is formed to become. The seal-side recess 65 is formed in an inclined shape so as to move downward toward the front side, and a front end of the seal-side recess 65 abuts against the upper surface of the plate portion 12a at a position near the rear upper end of the V-shaped groove 12b.

The pair of left and right side seal portions 63 are formed to be longer in the front-rear length than the upper center seal portion 66 and the seal-side recess 65, and are always pressed in close contact with the back surfaces of the left and right portions of the bumper face 4. It is configured as follows. Overhang seal portions 64 that move outward in the vehicle width direction are formed on the outer sides in the vehicle width direction of the pair of left and right side seal portions 63, respectively.
The pair of left and right side seal portions 63 are provided with a plurality of rib portions 68 that protrude inward in the vehicle width direction and extend in the front-rear direction.

Next, a procedure for assembling the grill shutter unit 30 will be described.
First, the shroud member 20 is assembled to the bumper rain 3 to which the crash can 2 and the mounting bracket 25 are connected to form a shroud assembly.
The bolt b4 (see FIGS. 4 and 5) is formed by superimposing the bolt hole h6 (see FIGS. 7 and 8) of the mounting bracket 25 provided on the bumper rain 3 and the bolt hole h2 (see FIGS. 9 and 11) of the shroud member 20. ) And tighten with a fastening tool. At this time, the shroud member 20 is preliminarily equipped with a member (such as the radiator 15) other than the grill shutter unit 30.
Next, the flange 1a of the front side frame 1 and the flange 2a of the crush can 2 are fastened by a plurality of bolts b1, and the shroud assembly is assembled to the front side frame 1.

A grill shutter unit 30 in which the traveling wind guide member 32 is assembled to the shutter unit 31 from the front is prepared.
As shown in FIG. 11, after engaging the plurality of engaging portions 54 with the front end portion of the inner peripheral portion of the unit frame portion 33, the shutter is inserted into the bolt hole h <b> 7 of the leg portion 56 provided in the traveling wind guide member 32. The grille shutter unit 30 is created by inserting the bolt part 47 of the unit 31 and fastening with the nut n1.

Next, the shock absorber 8 is attached to the front surface of the closing plate 7 of the bumper rain 3, and the grill shutter unit 30 is assembled to the front lower portion of the shroud member 20.
As shown in FIG. 11, after the bolt holes h4 and h5 of the shutter unit 31 are superimposed on the bolt holes h1 and h3 of the shroud member 20, the bolts b2 and b3 are inserted into the bolt holes h1, h3, h4 and h5 and fastened. Fastened with a tool (not shown).
Since the seal portion 38 of the traveling wind guide member 32 has flexibility, when the grill shutter unit 30 is assembled to the rear of the vehicle body from the traveling wind introduction port such as the front grill 4a or the bumper grill 4b, members around the traveling wind introduction port Damage due to contact with (for example, the shock absorber 8 projecting downward) can be avoided, and assembly workability can be improved.
Finally, after attaching the leg-wiping member 12, the bumper face 4 is assembled and the process ends.

Next, functions and effects of the grill shutter unit 30 of the vehicle V will be described.
According to the grill shutter unit 30 of the vehicle V, since the traveling wind introduced into the engine room without passing through the shutter unit 31 can be suppressed, it is possible to avoid the deterioration in fuel efficiency due to overcooling or increased traveling resistance. Further, since the shutter unit 31 and the guide frame portion 37 are disposed behind the bumper rain 3 and the flexible seal portion 38 is provided at the front end of the guide frame portion 37, the vehicle V moves backward when the vehicle V collides. The bumper rain 3 that deforms the seal portion 38 can protect the shutter unit 31 and the guide frame portion 37 from damage. Further, when the collision load is large and the guide frame portion 37 is damaged, it is only necessary to replace the traveling wind guide member 32, and the repairability performance can be improved.

  The traveling wind guide member 32 is configured as an integral different type resin molded body, and the guide frame portion 37 is configured to be attachable to the outer peripheral edge portion of the shutter unit 31. As a result, the traveling wind guide member 32 having a high thermal welding force between the guide frame portion 37 and the seal portion 38 can be manufactured in a single molding process, so that the productivity of the traveling wind guide member 32 can be increased. Further, since the workability of assembling the traveling wind guide member 32 can be improved, the repairability performance can be further improved.

  The vehicle V includes a shroud member 20 held by the bumper rain 3, and a shutter unit 31 is disposed in the vicinity of the front side of the shroud member 20 and is fixed to the front wall portion 23 a of the shroud member 20. As a result, the shroud member 20 moves backward in synchronism with the backward movement of the bumper rain 3 at the time of the forward collision of the vehicle V, so that the traveling wind guide member 32 can be further prevented from being damaged. After the shutter unit 31 and the shroud member 20 are assembled to the bumper rain 3 in advance as an assembly, the traveling wind guide member 32 can be assembled to the shutter unit 31 in a later process, so that the assembly workability can be further improved. .

  A lower horizontal wall portion 6e of the bumper rain 3 is formed in proximity to the upper surface of the upper seal portion 61 of the seal portion 38 of the traveling wind guide member 32. Accordingly, the seal portion 38 of the traveling wind guide member 32 is pressed against the lower horizontal wall portion 6e of the bumper rain 3 by the traveling wind pressure blocked by the shutter members 35a to 35e. Driving wind introduced into the engine room can be prevented, and fuel consumption performance degradation due to overcooling and increased driving resistance can be reliably avoided.

  The vehicle V includes a leg cleaning member 12 provided at a lower portion of the front end of the vehicle body. The leg cleaning member 12 is formed in contact with the lower surface of the lower seal portion 62 of the seal portion 38 of the traveling wind guide member 32. As a result, the seal portion 38 of the traveling wind guide member 32 is pressed against the leg removing member 12 by the traveling wind pressure blocked by the shutter members 35a to 35e, so that it is introduced into the engine room without passing through the shutter unit 31. Driving airflow can be prevented, and deterioration in fuel efficiency due to overcooling and increased driving resistance can be reliably avoided.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above embodiment, an example of a grille shutter unit having a plurality of shutter members has been described. However, when the front and rear lengths of the grille shutter unit can be secured, the traveling wind inlet is opened and closed by a single shutter member. Also good. In addition, although the example of the rectangular cylindrical grill shutter unit has been described, any shape is applicable.

2) In the above-described embodiment, the example in which the grill shutter unit is fixed to the shroud member supported by the bumper rain has been described. However, the grill shutter unit may be fixed to the shroud member supported by the front side frame. Instead of the shroud member, it may be fixed to the bumper rain or the front side frame via a mounting bracket.

3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  The present invention relates to a vehicle shutter shutter structure having a shutter unit having an openable / closable shutter member and a traveling wind guide member extending forward from the outer peripheral edge of the shutter unit to the front of the vehicle body. By providing a flexible synthetic resin-made seal portion, both fuel efficiency and repairability can be achieved.

V Vehicle 3 Bumper rain 4b Bumper grill 12 Leg wiper member 15 Radiator 20 Shroud member 23a (Side portion) Front wall portion 30 Grill shutter unit 31 Shutter unit 32 Traveling wind guide members 35a to 35e Shutter member 37 Guide frame portion 38 Seal portion 61 Upper seal 62 Lower seal part

Claims (5)

In a grill shutter structure of a vehicle provided with a shutter unit having a shutter member that is disposed at the rear of the vehicle body and can be opened and closed with respect to a traveling wind introduction port provided at the front end of the vehicle body,
A traveling wind guide member extending forward from the outer peripheral edge of the shutter unit to the vehicle body;
The traveling wind guide member has a frame portion made of a hard synthetic resin disposed at the rear of the vehicle body relative to a bumper reinforcement provided at the vehicle body front end, and is flexible from the front end of the frame portion to the front. A vehicular grill shutter structure comprising a seal portion made of soft synthetic resin. The traveling wind guide member is configured as a one-piece dissimilar resin molded body,
The vehicle grill shutter structure according to claim 1, wherein the frame portion is configured to be attachable to an outer peripheral edge portion of the shutter unit. The vehicle includes a shroud member held by the bumper reinforcement;
The grill shutter structure for a vehicle according to claim 1 or 2, wherein the shutter unit is disposed in the vicinity of the front side of the shroud member and is fixed to a front wall portion of the shroud member.   The vehicle according to any one of claims 1 to 3, wherein a lower end portion of the bumper reinforcement is formed close to an upper surface of an upper wall portion of the seal portion of the traveling wind guide member. Grill shutter structure.   The vehicle includes a leg wiping member provided at a lower portion of a front end of a vehicle body, and the leg wiping member is formed in contact with a lower surface of a lower wall portion of a seal portion of the traveling wind guide member. Item 5. A vehicle grill shutter structure according to any one of Items 1 to 4.