JP3545263B2 - Substructure of front pillar - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lower structure of a front pillar having a bent portion bent upward from a front end of a side sill.
[0002]
[Prior art]
FIG. 6 is a perspective view showing the inside of a pillar outer (not shown) of the front pillar 101, and a bent portion 103 having a closed cross-sectional shape bent upward from the front end of the side sill 102 is provided below the front pillar 101. It is formed by a reinforcement inner 104 and a reinforcement outer 105.
[0003]
A drain hose 111 for discharging rainwater to the sunroof is provided in the front pillar 101, and a work hole 112 is provided in the reinforcement 104 forming the bent portion 103. A urethane block 113 that is in close contact with the inner surface of the bent portion 103 is inserted below the work hole 112 in the bent portion 103, and generates a stone jumping sound generated at the side sill 102 and a vibration sound during traveling. Are not transmitted to the vehicle interior through the working hole 112.
[0004]
[Problems to be solved by the invention]
However, in the lower structure of the front pillar 101 described above, since the urethane block 113 formed in advance in the cross-sectional shape of the bent portion 103 is inserted, a gap is formed between the urethane block 113 and the inner surface of the bent portion 103. Is formed. In addition, the urethane block 113 has a cut-out portion 121 for the drain hose 111, and a gap is formed in the insert portion 121 as well. As a result, there is a problem that sound enters through these gaps.
[0005]
The present invention has been made in view of such a conventional problem, and has as its object to provide a lower structure of a front pillar that can prevent sound from entering from a side sill.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, in the lower structure of the front pillar according to the present invention, a bent portion 15 having a closed cross-sectional shape that is bent upward from the front end of the side sill 3 is provided below the front pillar 1. In the lower structure of the front pillar provided with the opening 18 that opens upward to the vehicle cabin I above the portion 15, the bent portion 15 is provided with a foamed plate 24 having a resin plate 31. A first foamed rubber , which extends in the front-rear direction of the vehicle below the opening 18 to partition the upper part and the lower part of the foamed plate 24, expands by heat in the resin plate 31. A layer 36 and a second foamed rubber layer 37 that expands due to heat are adhered, and the second foamed rubber layer 37 is set to have a lower expansion rate than the first foamed rubber layer 36. Round 34 is closed by the second foamed rubber layer 37, and the portion of the second foamed rubber layer 37 located on the circular hole 34 is more fragile than the general portion of the first foamed rubber layer 36. A fragile portion 38 is formed.
[0007]
That is, the foamed material provided at the bent portion below the front pillar is provided with a foamed material that expands by heat, and the foamed material is expanded by the heat applied in the painting process. Thereby, the expanded foam material is adhered to the inner surface of the bent portion formed in the closed cross-sectional shape, and the sound insulation between the upper portion and the lower portion defined by the foam material-added plate is enhanced.
[0008]
Further, the plate with the foam material is provided with a fragile portion which is more fragile than the general portion, and a drain hose extending into the front pillar is penetrated by the fragile portion. Furthermore, when the drain hose is penetrated through the plate with a foam material, since the plate with the foam material is provided with the fragile portion, the penetrating position is clarified. The foamed plate extending in the front-rear direction of the vehicle body at the bent portion is formed of a resin plate and a foamed material that expands due to heat, and is allowed to deform when an external force is input.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a vehicle 2 having a lower structure of a front pillar 1 according to the present embodiment. The front pillar 1 is connected to a front end of a side sill 3 of the vehicle 2.
[0010]
The vehicle 2 has a sunroof (not shown), and a drain hose 11 for discharging rainwater to the sunroof is provided in the front pillar 1. As shown in FIGS. 2 and 3, the front pillar 1 includes a pillar outer 12 (only FIG. 3 is shown), a reinforcement outer 13 provided on the vehicle cabin I side with respect to the pillar outer 12, and a reinforcement outer 13 together with the pillar outer 12. And a reinforce inner 14 having a closed cross-sectional shape. As shown in FIG. 2, a bent portion 15 having a closed cross-sectional shape bent upward from the front end of the side sill 3 is formed below the front pillar 1 by the reinforce outer 13 and the reinforce inner 14. (See FIG. 2). A floor panel 16 and a dash side inner 17 (only shown in FIG. 3) are welded to the upper end of the reinforcement inner 14, and a dash side located above the bent portion 15 and on the side of the vehicle cabin I. A work hole 18 as an opening for attaching a door hinge is provided in a portion of the inner 17.
[0011]
A shelf portion 22 is formed on the reinforcement inner 14 by a bulging portion 21 bulging out toward the outside O of the vehicle. A portion of the reinforcement outer 13 facing the bulging portion 21 includes: Mounting holes 23 are formed (see FIG. 2). Clips 25, 25 protruding from a plate with a foam material 24 are locked in the mounting holes 23, and the plate with a foam material 24 extends below the work holes 18 in the vehicle longitudinal direction. The inside of the bent portion 15 is partitioned into an upper portion and a lower portion of the foamed plate 24.
[0012]
The foamed plate 24 includes a resin plate 31. The plate 31 is formed in a rectangular plate shape extending from the front F side of the vehicle body to the rear R side of the vehicle body, and has a width. , And has a dimension to reach above the shelf 22 when attached to the bent portion (see FIG. 3). A bent portion 32 bent upward is formed on the plate 31 at an end on the rear R side of the vehicle body. A flange 33 is formed on the periphery of the plate 31 and one of the long sides is formed. The clips 25, 25 protrude from a flange 33 formed on the side. Further, as shown in FIG. 4, the plate 31 is provided with a circular hole 34 and three long holes 35 for withdrawing the electrodeposition liquid at the time of electrodeposition coating. The long holes 35 are closed by a first foamed rubber layer 36 as a foam material adhered to the plate 31 with an adhesive. Further, the circular hole 34 is closed by a second foam rubber layer 37 which is a foam material, and a portion of the second foam rubber layer 37 located on the circular hole 34 is more fragile than a general portion. A weak part 38 is formed.
[0013]
The first and second foamed rubber layers 36 and 37 are made of foamed rubber which foams and expands due to the heat applied in the painting process. The rubber layer 37 is configured to expand about 1.6 times. The first foamed rubber layer 36 is also adhered to the flange 33 except for the surface where the clip 25 protrudes, and when the bent portion 32 of the plate 31 is expanded, The front end is in close contact with the upper surface of the rear R side, and the front end is in close contact with the front surface of the front F side in the bent portion 15. Further, as shown in FIG. 5, in an expanded state, while being in close contact with the inner side surface of the bent portion 15, it reaches the shelf 22 so that the foamed plate 24 can be supported by the shelf 22. It is configured.
[0014]
In the present embodiment according to the above configuration, the first and second foam rubber layers 36 and 37 which expand by heat are attached to the foamed plate 24 provided in the bent portion 15 below the front pillar 1. As shown in FIG. 5, these foamed rubber layers 36 and 37 are expanded by the heat applied in the painting process, and are brought into close contact with the inner surface of the bent portion 15 having a closed cross section. Can be. Therefore, because of the structure in which the urethane block formed in advance in the cross-sectional shape of the bent portion 15 is inserted, a sound insulating property is improved as compared with the conventional case where a gap is formed between the urethane block and the inner surface of the bent portion 15. Therefore, it is possible to reliably prevent the sound generated by the side sill 3 from entering the vehicle interior I.
[0015]
In the plate 24 with the foam material, a weak portion 38 which is weaker than a general portion is formed by the circular hole 34 and a second foamed rubber layer 37 closing the circular hole 34. For this reason, as shown in FIG. 5, the drain hose 11 extending into the front pillar 1 can be penetrated through the fragile portion 38 and can extend downward from the foamed plate 24. At this time, the expanded first and second foamed rubber layers 36 and 37 are in close contact with the peripheral surface of the drain hose 11, so that the insertion portion of the drain hose 11 is sound-insulated by the urethane block which has been cut in advance. Compared with a conventional structure having a structure in which a gap formed between the drain hose 11 and the insertion portion cannot be filled, even in a sunroof type vehicle having a sunroof as in the present embodiment, the sound insulation is improved. The drain hose 11 can be prevented from rattling.
[0016]
Further, the second foamed rubber layer 37 for closing the circular hole 34 of the foamed plate 24 is made of foamed rubber having a lower expansion coefficient than the first foamed rubber layer 36. In a state where 37 is expanded, the position of the fragile portion 38 in the second foamed rubber layer 37 located on the circular hole 34 can be clarified. Thereby, workability at the time of penetrating the drain hose 11 can be improved.
[0017]
The foamed plate 24 extending in the longitudinal direction of the vehicle body at the bent portion 15 is formed by a resin plate 31 and first and second foamed rubber layers 36 and 37 expanded by heat. The configuration is such that deformation when an external force is input is allowed. For this reason, compared with the case where a metal plate extending in the front-rear direction of the vehicle body is provided in the bent portion 15 to divide the upper and lower portions, the collapse at the bent portion 15 can be allowed. Thereby, at the time of an offset collision, as shown in FIG. 1, an allowance for intrusion of the front tire 41 moved to the rear R of the vehicle body can be secured in the bent portion 15, and it is possible to contribute to absorbing the collision energy. . Further, the deformation is further ensured by the elongated holes 35 provided in the plate 31.
[0020]
【The invention's effect】
As described above, in the lower structure of the front pillar of the present invention, the foamed material of the plate with the foamed material provided at the bent portion of the lower part of the front pillar is expanded by the heat applied in the painting process, and the closed cross-sectional shape is increased. Can be brought into close contact with the inner surface of the bent portion formed at the bottom. Therefore, because of the structure in which the urethane block molded into the cross-sectional shape of the bent portion is inserted in advance, the sound insulation is improved as compared with the conventional case where a gap is formed between the urethane block and the inner surface of the bent portion. Thus, it is possible to reliably prevent the sound generated from entering the side sill.
[0021]
Further, the foamed plate is provided with a fragile portion which is more fragile than a general portion, and in a sunroof type vehicle in which a drain hose for discharging rainwater to the sunroof is provided in a front pillar, The drain hose can be penetrated through the fragile portion of the foamed plate, and can extend downward from the foamed plate. At this time, since the expanded foam material is in close contact with the peripheral surface of the drain hose, the insertion portion of the drain hose has a structure in which sound is blocked by a urethane block that has been cut in advance. Compared with a conventional vehicle in which a gap formed therebetween cannot be filled, even in a sunroof type vehicle, sound insulation can be improved and fluttering of a drain hose can be prevented. Further, when the drain hose penetrates through the plate with the foam material, since the fragile portion is provided, the penetrating position can be clarified, and the workability can be improved.
[0022]
The plate with a foam material that extends in the front-rear direction of the vehicle body at the bent portion and that partitions the upper and lower portions is formed of a resin plate and a foam material. For this reason, compared with the case where the bent portion is provided with a metal plate extending in the vehicle longitudinal direction, it is possible to allow the bent portion to collapse. Thereby, at the time of an offset collision, an allowance for intrusion of the front tire moved rearward of the vehicle body can be secured in the bent portion, so that it is possible to contribute to absorbing the collision energy.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a part A of FIG.
FIG. 3 is a sectional view showing a lower portion of a front pillar corresponding to line BB in FIG. 1;
FIG. 4 is a plan view showing the plate with a foam material according to the embodiment.
FIG. 5 is a cross-sectional view of a main part showing a state where first and second foam rubber layers are expanded in the foamed plate according to the embodiment.
FIG. 6 is a perspective view showing a lower portion of a conventional front pillar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front pillar 3 Side sill 11 Drain hose 12 Pillar outer 13 Reinforce outer 14 Reinforce inner 15 Bend 17 Dash side inner 18 Work hole (opening)
24 Plate 31 with foam material Plate 36 First foam rubber layer (foam material)
37 Second foamed rubber layer (foamed material)
38 Vulnerable part

Claims (1)

A bent portion 15 having a closed cross-sectional shape bent upward from the front end of the side sill 3 is provided at a lower portion of the front pillar 1, and an opening 18 is provided above the bent portion 15 and opens toward the vehicle cabin I side. In the lower structure of the front pillar,
A plate 24 with a foam material provided with a plate 31 made of resin is provided in the bent portion 15 in the longitudinal direction of the vehicle below the opening 18, and an upper part and a lower part of the plate 24 with a foam material are connected. While partitioning,
A first foamed rubber layer 36 expanded by heat and a second foamed rubber layer 37 expanded by heat are adhered to the resin plate 31, and the second foamed rubber layer 37 is formed of the first foamed rubber layer 37. The expansion coefficient is set to be lower than that of the foamed rubber layer 36, and the circular hole 34 of the plate 31 is closed by the second foamed rubber layer 37 and the second foamed rubber layer located on the circular hole 34 37. A lower structure of a front pillar, wherein a weak portion 38 which is weaker than a general portion by the first foamed rubber layer 36 is formed at a portion 37 .

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