WO2016059886A1

WO2016059886A1 - Vehicle deck garnish structure

Info

Publication number: WO2016059886A1
Application number: PCT/JP2015/074102
Authority: WO
Inventors: 昌史武居; 尚久井澤; 宏之小林
Original assignee: 三菱自動車工業株式会社
Priority date: 2014-10-17
Filing date: 2015-08-26
Publication date: 2016-04-21
Also published as: JP6468477B2; BR112017005623B1; BR112017005623A2; JP2016078697A

Abstract

The purpose of the present invention is to provide a deck garnish structure for an integrally shaped deck garnish to decrease manufacturing and assembly steps and reduce cost, while effectively achieving pedestrian protection. The deck garnish structure has a cross section in a vehicle front-rear direction including an upper wall portion (27) to which a weather strip (23) disposed between a lower surface of a front hood (5) and an upper surface of a deck garnish (1) is attached, a front wall portion (28) continuous from the upper wall portion (27) on the vehicle front side, a rear wall portion (29) continuous from the upper wall portion on the vehicle rear side, and an energy absorption chamber (31) enclosed by the upper wall portion (27), the front wall portion (28), and the rear wall portion (29) and formed with a lower opening, wherein the energy absorption chamber (31) extends in a vehicle width direction, with a link member (21) disposed at least at a center portion in the vehicle width direction bridging and linking the front wall portion (28) and the rear wall portion (29) so as to close the lower end portion of the energy absorption chamber 31.

Description

Vehicle deck garnish structure

The present disclosure relates to a deck garnish structure that absorbs an impact applied to a front hood of a vehicle.

Usually, in automobiles where an engine room is formed in the front part of the vehicle, a deck garnish extending across the width of the vehicle for decoration etc. is provided between the lower end of the windshield and the rear end of the front hood. It has been. The deck garnish is disposed above a cowl top, which is a skeleton member that supports the lower end of the front windshield, and is configured to cover the upper surface of the lower end of the front windshield and to be recessed below the rear end of the front hood.

The deck garnish configured as described above is made of, for example, resin and has a certain degree of rigidity. Therefore, when an impact is applied from above the front hood, the front hood is displaced downward by the impact and comes into contact with the deck garnish. At this time, the displacement of the front hood is prevented by the rigidity of the deck garnish. . As a result, the impact applied to the front hood tends not to be absorbed. In particular, when the deck garnish has a vertical wall portion as described above, this tendency can be conspicuous due to the rigidity of the vertical wall portion.

For this reason, in order to efficiently absorb the impact applied to the front hood from above, a structure for absorbing the impact with a deck garnish has been proposed.
For example, in Patent Document 1, the overall shape of the deck garnish in the vehicle width direction is configured by two upper and lower members of a deck garnish upper portion and a deck garnish lower portion. The cross-section is formed in a substantially U-shape that is open to either the front or rear, and extends in the vehicle width direction, and a plurality of ribs that are arranged at intervals in the vehicle width direction are erected inside. As a structure, it is shown that shock absorption is performed by an energy absorbing portion having a substantially U-shaped cross section.

Further, Patent Document 2 shows a structure in which a part of the deck garnish is used as a fragile portion (thin wall portion) and the impact applied to the front hood is absorbed by the fragile portion being destroyed.

JP 2008-30632 A Japanese Patent Laid-Open No. 2005-306086

However, since the deck garnish disclosed in the above-mentioned Patent Document 1 has a structure that is divided into two parts in the upper and lower directions, the structure becomes complicated, and there is a problem that the number of man-hours for manufacturing and assembly, or the manufacturing cost increases. Yes. In addition, energy absorption can be obtained by crushing a plurality of substantially U-shaped ribs provided inside the deck garnish lower, so depending on the size of the ribs or the arrangement of the ribs in the vehicle width direction, energy absorption effect may be obtained. It tends to be difficult to obtain.

In addition, the deck garnish disclosed in Patent Document 2 has a structure in which a portion of the deck garnish is made into a fragile portion due to a thin wall and the impact applied to the front hood is absorbed by the fragile portion being destroyed. Therefore, it is difficult to maintain the entire deck garnish in the vehicle width direction as an integrated shape, which causes a problem in handling during assembly.

Therefore, in view of these technical problems, the object of at least one embodiment of the present invention is to integrally form the deck garnish to reduce manufacturing and assembly man-hours and costs, and to effectively achieve pedestrian protection. An object is to provide a deck garnish structure.

The vehicle deck garnish structure according to at least one embodiment of the present invention is disposed across the vehicle width direction between the lower end of the front windshield of the vehicle and the rear end of the front hood of the vehicle, below the rear end of the front hood, And in the deck garnish structure provided with the energy absorbing portion arranged above the skeleton member of the vehicle,
The energy absorbing portion includes a top wall portion to which a weather strip is interposed between a lower surface of the front hood and an upper surface of the deck garnish, and a front wall on the front side of the vehicle connected from the upper wall portion. And an energy absorption chamber formed by opening the lower side surrounded by the upper wall portion, the front wall portion and the rear wall portion. The energy absorption chamber extends in the vehicle width direction, and bridges the front wall portion and the rear wall portion so as to close the lower end portion of the energy absorption chamber at least in the center portion in the vehicle width direction. And a connecting member for connecting is provided.

According to this configuration, the load applied to the rear end portion of the front hood of the vehicle acts on the energy absorption chamber formed by opening the lower side surrounded by the upper wall portion, the front wall portion, and the rear wall portion. The load can be absorbed by the energy absorption chamber being crushed or deformed.

In addition, since at least a central portion in the vehicle width direction includes a connecting member that bridges and connects the front wall portion and the rear wall portion so as to close the lower end portion of the energy absorption chamber, the energy absorption chamber Since the rigidity of the deck garnish in the center in the vehicle width direction can be secured without impairing the absorption effect of the deck garnish, the integrated shape of the deck garnish is maintained.

In some embodiments, the front wall portion and the rear wall portion forming the energy absorption chamber are formed to be inclined toward the front side of the vehicle, and the load acting on the lower side from the front hood causes the The front wall portion and the rear wall portion are each deformed to be inclined forward.

According to such a configuration, the front wall portion and the rear wall portion that form the energy absorption chamber are formed to be inclined toward the vehicle front side, and therefore, by a load acting downward from the front hood, The front wall portion and the rear wall portion are each further deformed so as to incline forward, whereby energy can be absorbed reliably.

In some embodiments, an opening to which a pivot shaft of a front window wiper is attached is formed at a center portion in the vehicle width direction of the deck garnish, and a peripheral flange of the opening is connected to a rear end portion of the connecting member. It is characterized by being.

According to such a configuration, since the peripheral flange of the opening is connected to the rear end portion of the connecting member, the rigidity of the connecting member is improved and the integrated shape of the deck garnish is further maintained.

In some embodiments, the connecting member is provided on the left and right sides with a space in the center in the vehicle width direction, and the connecting member bridges the front wall portion and the rear wall portion. It has a bridging portion to be connected and a rib portion that is integral with the bridging portion and extends to the upper wall portion along the rear wall portion.

According to such a configuration, when the connecting members are provided on the left and right sides with a gap in the center portion in the vehicle width direction of the deck garnish, the shock absorption is performed by the deformation of the energy absorption chamber in the central portion, and therefore, it is disposed on the left and right portions. In each of the connecting members, the rib portion can be provided to improve the rigidity rather than the energy absorption.

In some embodiments, the left and right positions are formed asymmetrically with respect to the center in the vehicle width direction.

According to such a configuration, it is possible to cope with the case where the connecting member is not arranged symmetrically due to the interference with the parts arranged inside the deck garnish, or when the connecting member cannot be installed in the center portion.

In some embodiments, both ends of the deck garnish in the vehicle width direction are closed by vertical walls.

According to such a configuration, since both ends of the deck garnish in the vehicle width direction are closed by the vertical walls, the rigidity of the deck garnish in the region of both ends can be maintained.

According to at least one embodiment of the present invention, the deck garnish has a rigidity capable of maintaining the shape even if the deck garnish is integrated, can reduce manufacturing and assembly man-hours, reduce costs, and can effectively achieve pedestrian protection. Deck garnish is obtained.

It is the schematic of the vehicle front part of a motor vehicle provided with the deck garnish which concerns on one Embodiment of this invention. It is the isometric view schematic diagram which looked at the deck garnish of FIG. 1 from A arrow of the vehicle width direction side inside an engine room. FIG. 3 is a partially enlarged explanatory view of a central portion of the deck garnish of FIG. FIG. 4 is a cross-sectional explanatory view taken along the line CC of FIG. 3. It is a partially expanded explanatory view of the center part of the deck garnish which shows other embodiment corresponding to FIG. FIG. 6 is a cross-sectional explanatory view taken along line DD (D′-D ′) in FIG. 5.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in these embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Only.

FIG. 1 is a perspective view showing an outline of a front portion of a vehicle 3 including a deck garnish 1 according to an embodiment of the present invention.
As shown in FIGS. 1 and 4, the deck garnish 1 is mounted between a front hood (engine hood) 5 and a front window 7 and extends along the vehicle width direction. ing. The deck garnish 1 is arranged such that a front portion 1F is recessed below a rear end edge portion of the front hood 5, and a rear portion 1R sandwiches a lower end edge portion 7a of the front window 7. A deck panel 9 that is a vehicle structure is disposed below the deck garnish 1.

FIG. 2 shows a schematic view of the deck garnish 1 as viewed from the direction of arrow A in FIG. That is, a schematic diagram of the back side surface of the deck garnish 1 is shown in FIG.

Circular openings

11 and 13 are formed at the center portion in the vehicle width direction (position shifted to the right side from the center position Q in the vehicle width direction) and the right end portion in FIG. These are openings through which a pivot shaft (not shown) constituting the wiper device of the front window 7 passes. A ventilation duct 15 having a plurality of communication holes for communicating the engine room side, which is the inside of the deck garnish, and the outside air, is formed on the left side of the center portion.

Further,

vertical walls

17 and 19 are formed at both end portions in the vehicle width direction so as to be orthogonal to the vehicle width direction, respectively, and the whole is formed by the

vertical walls

17 and 19 at both ends in the vehicle width direction of the deck garnish 1. Since the shape is closed, the rigidity of the deck garnish 1 can be ensured in the region of both ends.

FIG. 3 is a partially enlarged explanatory view of the center portion of the deck garnish of FIG.
As shown in FIGS. 2 and 3, a peripheral flange 11 a that forms the opening edge of the opening 11 in the central portion is connected to a rear end portion of a connecting member 21 described later. A cross-sectional shape of the deck garnish 1 cut along a cutting line CC passing through the connecting member 21 is shown in FIG.

4, the front hood 5 is a steel plate lid member that covers the upper surface of the engine room, and is formed by joining an inner hood panel 5a and an ata hood panel 5b. A weather strip 23 is interposed between the inner hood panel 5a and the front portion 1F of the deck garnish 1 to prevent rainwater and foreign matter from entering the engine room.

The deck garnish 1 is provided with an energy absorbing portion 25 on the front 1F of the deck garnish. The energy absorbing portion 25 is disposed below the rear end 5c of the front hood 5 and above the deck panel 9 of the vehicle.

The energy absorption part 25 has a cross-sectional shape in the vehicle front-rear direction, an upper wall part 27 for attaching the weather strip 23 to the upper surface, a front wall part 28 on the vehicle front side connected from the upper wall part 27, and an upper wall part 27. Energy absorption formed by having a rear wall portion 29 on the vehicle rear side connected to the vehicle and surrounded by the upper wall portion 27, the front wall portion 28, and the rear wall portion 29 and having an opening 30 on the lower side. A chamber 31 is provided.
And the shape of the energy absorption part 25 which has this energy absorption chamber 31 is extended in the vehicle width direction whole region of the deck garnish 1. As shown in FIG.
Further, a harness or pipe support 33 is integrally formed on the inner wall surface of the front wall 28 at an arbitrary position in the vehicle width direction.

The energy absorption chamber 31 formed in the vehicle width direction has a lower end portion of the front wall portion 28 and a rear wall portion 29 so as to close the opening 30 at the lower end portion of the energy absorption chamber 31 in the center portion in the vehicle width direction. A connecting member 21 that bridges and connects the lower ends is provided.
The connecting member 21 is formed integrally with the front wall portion 28 and the rear wall portion 29. As described above, the deck garnish 1 is integrally formed with each part of the resin material by injection molding.
Therefore, since the deck garnish shape can be formed with an integral structure, the manufacturing and assembly man-hours can be reduced and the cost can be further reduced as compared with a complicated structure or a divided shape.

Further, as described above, the opening 11 to which the pivot shaft of the front window wiper is attached is formed on the rear side of the connecting member 21.
And the peripheral flange 11a of this opening 11 is formed so that it may connect with the rear-end part of the connection member 21. FIG. For this reason, the rigidity of the connecting member 21 is improved by the connection of the opening 11 with the peripheral flange 11a.

Further, the rear portion 1R of the deck garnish 1 on the rear side of the opening 11 is formed in a substantially U-shaped cross section in the vehicle front-rear direction, and the open side of the U-shape is arranged facing rearward and upward. The lower end edge portion 7a of the front window 7 is inserted from the U-shaped open side and is attached to the rear portion 1R of the deck garnish.

The lower end portion of the front window 7 is fixed to the upper surface of the deck panel 9 of the vehicle structure disposed below the lower end portion of the front window 7 with an adhesive.
Further, the flange portion 35 of the front portion 1F of the deck garnish is fixed to the upper surface of the deck panel 9 of the vehicle structure portion disposed below the deck garnish 1 with a screw member (not shown).

As shown in FIG. 4, the deck garnish 1 is attached so as to be inclined so that the front of the vehicle is positioned downward when attached to the vehicle. Therefore, the front wall portion 28 and the rear wall portion 29 that form the energy absorption chamber 31 are formed in a state inclined toward the vehicle front side.

Next, the case where the deck garnish 1 having the above-described configuration is provided in a vehicle and the impact load P acts from the upper side of the front hood 5 to the lower side will be described.
When an impact load P acts on the upper surface of the front hood 5, the load is transmitted to the weather strip 23 via the inner hood panel 5 a of the front hood 5, and is transmitted to the upper wall portion 27 of the energy absorption chamber 31 via the weather strip 23. Load is transmitted.
At this time, since the front wall portion 28 and the rear wall portion 29 of the energy absorption chamber 31 are formed in a state inclined toward the vehicle front side, the front wall portion 28 and the rear wall portion 29 are moved forward by the action of the impact load P as shown by a two-dot chain line in FIG. The wall portion 28 and the rear wall portion 29 are crushed and further deformed while being greatly inclined forward. This absorbs impact energy.

As shown by a two-dot chain line in FIG. 4, when the front wall portion 28 and the rear wall portion 29 are further greatly inclined and deformed forward by the action of the impact load P, the connecting member 21 has the energy absorption chamber 31. Therefore, energy absorption is effectively performed without affecting the forward deformation.

On the other hand, the shape of the entire deck garnish 1 in the vehicle width direction is such that the front wall portion 28 and the rear wall portion 29 are bridged so as to close the opening 30 at the lower end portion of the energy absorption chamber 31 at the center portion in the vehicle width direction. The connecting member 21 to be connected is provided, so that the rigidity in the center portion of the deck garnish 1 in the vehicle width direction can be secured without impairing the absorption effect of the energy absorbing chamber 31, and both end portions are defined by the

vertical walls

17 and 19. Combined with the closing, the rigidity of the deck garnish 1 is ensured and the integral shape is maintained.
Thus, the deck garnish 1 that achieves both pedestrian protection and cost reduction due to the integral shape is obtained.

Next, another embodiment of the connecting member will be described with reference to FIGS.
The connecting

members

61 and 61 shown in FIG. 5 are provided on the left and right sides of the center portion in the vehicle width direction with a distance L between the center position Q ′. FIG. 5 shows a structure that is horizontally reversed from the deck garnish 1 of FIG.

As shown in FIG. 6, the cross-sectional shapes of the front portion 53F and the rear portion 53R of the deck garnish 53 are the same as those in the above-described embodiment, but the shape of the intermediate portion 53M is different. It has the shape which has the convex-shaped part 55 which protruded.

Since the shape of the intermediate portion 53M is raised in a convex shape, the rear wall portion 60 of the energy absorption chamber 57 is shorter than the rear wall portion 29 of the embodiment. The energy absorption chamber 57 is formed by an upper wall portion 58, a front wall portion 59, and a rear wall portion 60.

The connecting member 61 is formed integrally with the bridging portion 63, which bridges and connects the front wall portion 59 and the rear wall portion 60. The bridging portion 63 is connected to the rear wall portion 60 from the rear end portion of the bridging portion 63. And a rib portion 65 extending to the upper wall portion 58.

As shown in FIG. 6, when the impact load P acts from the upper side to the lower side of the front hood 5, the load is transmitted to the weather strip 23 via the inner hood panel 5a of the front hood 5, and the weather A load is transmitted to the upper wall portion 58 of the energy absorption chamber 57 via the strip 23. Since the front wall portion 59 and the rear wall portion 60 of the energy absorption chamber 57 are formed to be inclined toward the front side of the vehicle, the front wall portion 59 is acted upon by the impact load P as shown by a two-dot chain line in FIG. Further, the rear wall portion 60 is crushed and further deformed by being greatly inclined forward. This absorbs impact energy.

On the other hand, when the connecting

members

61 and 61 are provided on the left and right sides with a distance L in the center portion in the vehicle width direction of the deck garnish 53, the impact energy is absorbed mainly at the center position Q ′ in the vehicle width direction. In the connecting

members

61 and 61 arranged in the left and right portions, even if the rib portion 65 is provided in the energy absorbing chamber 57, the energy absorbing property is not deteriorated. It is possible to contribute to the improvement of the overall rigidity of the deck garnish 53.

When the connecting

members

61 and 61 are provided on the left and right sides as described above, the rib portions 65 are formed in the connecting

members

61 and 61, respectively, so that the energy absorption chamber 57 for absorbing energy is located at the center position Q ′ in the vehicle width direction. As a result, the pedestrian can be protected and the rigidity of the central portion of the deck garnish 53 can be secured, so that the integrated shape can be maintained.

The positions where the connecting

members

61 and 61 are provided on the left and right sides need not be provided symmetrically with respect to the center position Q ′, and may be arranged so as to avoid interference with components arranged inside the deck garnish 53. . This is suitable when interference with other parts or a connecting member cannot be installed at the center.

Moreover, it is good also as embodiment which combined the connection member 21 of the said one embodiment, and the

connection members

61 and 61 of other embodiment. In this case, the connection member 21 is provided in the center part, and the connection member is provided. It is good also as a deck garnish structure which further provides the

connection members

61 and 61 on the both sides of 21. FIG.

According to an embodiment of the present invention, the deck garnish is formed in an integrated shape, and the deck garnish capable of effectively achieving pedestrian protection is obtained while reducing the manufacturing and assembly man-hours and costs, and thus the deck garnish of the vehicle can be obtained. It is effective for application to structures.

DESCRIPTION OF

SYMBOLS

1, 53 Deck garnish 1F Front part of deck garnish 1R Rear part of deck garnish 3 Vehicle 5 Front hood 5a Inner hood panel 5b Outer hood panel 5c Front hood rear end 7 Front window glass 7a Front window lower

end edge parts

21, 61 Member 23 Weather strip 25

Energy absorbing portion

27, 58

Upper wall portion

28, 59

Front wall portion

29, 60 Rear wall portion 30

Open port

31, 57 Energy absorbing chamber

Claims

An energy absorbing portion is disposed across the vehicle width direction between the lower end of the front windshield of the vehicle and the rear end of the front hood of the vehicle, and is disposed below the rear end of the front hood and above the skeleton member of the vehicle. In the deck garnish structure,
The energy absorbing portion includes a top wall portion to which a weather strip is interposed between a lower surface of the front hood and an upper surface of the deck garnish, and a front wall on the front side of the vehicle connected from the upper wall portion. And an energy absorption chamber formed by opening the lower side surrounded by the upper wall portion, the front wall portion and the rear wall portion. ,
The energy absorption chamber is extended in the vehicle width direction, and at least a central portion in the vehicle width direction is formed by bridging the front wall portion and the rear wall portion so as to close a lower end portion of the energy absorption chamber. A deck garnish structure for a vehicle, wherein a connecting member for connection is provided.
The front wall portion and the rear wall portion forming the energy absorption chamber are formed to be inclined toward the front side of the vehicle, and the front wall portion and the rear wall are formed by a load acting downward from the front hood. 2. The vehicle deck garnish structure according to claim 1, wherein each of the portions is deformed to be inclined forward.
An opening to which a pivot shaft of a front window wiper is attached is formed at a center portion of the deck garnish in the vehicle width direction, and a peripheral flange of the opening is connected to a rear end portion of the connecting member. Item 3. A vehicle deck garnish structure according to Item 1 or 2.
The connecting member is provided on the left and right sides with a space in the center portion in the vehicle width direction, and the connecting member includes a bridging portion that bridges and connects the front wall portion and the rear wall portion. The deck garnish structure for a vehicle according to any one of claims 1 to 3, further comprising a rib portion that is integral with the portion and extends to the upper wall portion along the rear wall portion.
The vehicle deck garnish structure according to claim 4, wherein the left and right positions are formed asymmetrically with respect to the center in the vehicle width direction.
The vehicle deck garnish structure according to any one of claims 1 to 5, wherein both ends of the deck garnish in the vehicle width direction are closed by vertical walls.