JP3590713B2 - Airbag device for automobile side collision - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a side collision airbag device for an automobile.
[0002]
[Prior art]
2. Description of the Related Art In an airbag device for an automobile, there is an airbag device for a side collision in which an airbag is deployed forward from a side portion of a seat back at the time of a side collision of a vehicle and an occupant is protected by the airbag. As a technique, refer to JP-A-9-136598.
[0003]
In this type of airbag device, an airbag and an inflator are housed in a housing, and bolts of the inflator project from a rear end of the housing. Then, the rear end of the housing in a state where the bolts are projected is housed in a housing part of the base panel, and is attached to the seat back frame together with the base panel. The storage portion of the base panel has a sectional shape with an open front, receives a rearward reaction force of the inflator when the airbag is deployed forward, and is for reliably deploying the airbag forward. .
[0004]
Since the storage portion has a cross-sectional shape (for example, a semicircular cross-section) with an open front, a rear end portion of the housing, from which the bolt is projected, is inserted into the storage portion by a portion other than the storage portion in the base panel. A long hole along the front-rear direction is formed from the storage portion to the storage portion, a bolt is inserted into the long hole at a position other than the storage portion, and then the bolt in the long hole is moved rearward, whereby the rear end of the housing is formed. It is designed to be located in the storage section.
[0005]
[Problems to be solved by the invention]
In such a conventional technique, a long hole is formed in the base panel to allow the bolt to move forward and backward so that the rear end of the housing from which the bolt is projected is housed in the housing part of the base panel. Therefore, after the rear end portion of the housing is stored in the storage portion, the housing is not stabilized with respect to the base panel, and may be displaced forward before being finally mounted on the seat back frame. There is. For this reason, the work of mounting the housing and the base panel is troublesome, and the efficiency of the assembling work is reduced.
[0006]
The present invention has been made in response to such a demand, and an object of the present invention is to provide an airbag device for a side collision of an automobile, which can prevent a forward displacement of a housing with respect to a base panel.
[0007]
[Means for Solving the Problems]
According to the first aspect of the invention, the airbag and the inflator are housed in the housing, and the bolts of the inflator are protruded from the rear end of the housing to the outside, and the rear of the base panel fixed to the seat back frame from the vehicle outside. A storage section having a cross-sectional shape opened forward at the end is formed toward the outside of the vehicle, and an elongated hole is formed in the base panel so that a bolt of a housing can be freely moved back and forth. , The rear end of the housing is housed in the housing of the base panel, and the base panel and a vertically long bracket attached between the base panel and the seat back frame are attached to each other. A first engagement portion and a second engagement portion that are engaged in the front-rear direction to restrict forward movement of the bracket with respect to the base panel are formed, and It is inserted bolt housing bets, characterized in that the formation of the insertion hole for restricting the forward movement of the bolt.
[0008]
According to the first aspect of the present invention, the forward movement of the bracket with respect to the base panel is restricted by the engagement of the first engagement portion and the second engagement portion, and the bolt of the housing is inserted into the insertion hole of the bracket. Therefore, the forward displacement of the housing is prevented by the engagement between the insertion hole and the bolt. Therefore, the work of attaching the housing and the base panel to the seat back frame becomes easy.
[0009]
According to a second aspect of the present invention, there is provided the airbag device for a side collision of an automobile according to the first aspect, wherein a temporary fixing ring is attached to a bolt penetrating the insertion hole of the bracket.
[0010]
According to the second aspect of the present invention, since the temporary fixing ring is attached to the bolt penetrating the insertion hole of the bracket, the housing, the base panel, and the bracket are integrated, and the work of attaching these to the seat back is easy. become.
[0011]
According to a third aspect of the present invention, there is provided the side airbag device for an automobile according to the first or second aspect, wherein the first engaging portion is a notch portion and the second engaging portion is inside the notch portion. The front end of the bead engaging with the front end of the cutout portion is a vertical cut start end surface.
[0012]
According to the third aspect of the present invention, since the first engaging portion is the cutout portion and the second engaging portion is the bead portion, it can be formed simultaneously when each member is pressed.
[0013]
According to a fourth aspect of the present invention, there is provided the side airbag device for an automobile according to any one of the first to third aspects, wherein a bent portion toward the outside of the vehicle is integrally formed at an upper end or a lower end of the bracket. A harness of an inflator is locked to the bent portion.
[0014]
According to the fourth aspect of the present invention, since the harness can be locked using the bent portion formed integrally with the bracket, a dedicated bracket for locking the harness is not required, and the number of parts can be reduced. Can be planned.
[0015]
According to a fifth aspect of the present invention, there is provided an air bag device for a side collision of an automobile according to any one of the first to fourth aspects, wherein a front end of the bracket is inclined to the outside of the vehicle, and the front end of the vehicle is attached to the outside of the vehicle. A convex bead is formed along the vertical direction.
[0016]
According to the fifth aspect of the present invention, since a bead projecting outward from the vehicle is formed along the vertical direction at the inclined front end of the base panel, interference between the deployed airbag and the terminal of the front end is avoided. can do.
[0017]
【The invention's effect】
According to the first aspect of the present invention, the forward movement of the bracket with respect to the base panel is restricted by the engagement of the first engagement portion and the second engagement portion, and the bolt of the housing is inserted into the insertion hole of the bracket. Therefore, the forward displacement of the housing is prevented by the engagement between the insertion hole and the bolt. Therefore, the work of attaching the housing and the base panel to the seat back frame becomes easy.
[0018]
According to the second aspect of the present invention, since the temporary fixing ring is attached to the bolt penetrating the insertion hole of the bracket, the housing, the base panel, and the bracket are integrated, and the work of attaching these to the seat back is easy. become.
[0019]
According to the third aspect of the present invention, since the first engaging portion is the cutout portion and the second engaging portion is the bead portion, it can be formed simultaneously when each member is pressed.
[0020]
According to the fourth aspect of the present invention, since the harness can be locked using the bent portion formed integrally with the bracket, a dedicated bracket for locking the harness is not required, and the number of parts can be reduced. Can be planned.
[0021]
According to the fifth aspect of the present invention, since a bead projecting outward from the vehicle is formed along the vertical direction at the inclined front end of the base panel, interference between the deployed airbag and the terminal of the front end is avoided. can do.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. In the drawings, Y1 indicates the front, Y2 indicates the rear, X1 indicates the inside of the vehicle compartment, and X2 indicates the outside of the vehicle.
[0023]
FIG. 1 is a diagram of a seat back 1 of a front seat on a driver's seat side (right side) viewed from a left side (inside a vehicle compartment). At the right end of the seat back 1, a housing 2 is housed. In the housing 2, a folded airbag 3 and an inflator 4 for ejecting gas G for deploying the airbag 3 are housed. I have. A pair of upper and lower bolts 5 formed on the inflator 4 project outside from the rear end of the housing 2. An ejection port 6 for ejecting gas G is provided at the lower end of the side surface of the inflator 4, and a harness 7 extends from the upper end of the inflator 4. A clip 8 is provided in the middle of the harness 7.
[0024]
The airbag 3 has a substantially L shape, and is provided with a partition cloth 9 that divides an internal space into a lower chest protection portion A and an upper head protection portion B. A ventilation hole 10 is formed on the rear side of the partition cloth 9. Therefore, the gas G ejected from the ejection port 6 of the inflator first enters the chest protection part A and deploys the chest protection part A forward. And is introduced into the head protection part B to expand the head protection part B upward.
[0025]
The housing 2 including the airbag 3 and the inflator 4 is attached to a seat back frame 13 (see FIG. 4) from the outside of the vehicle via a base panel 11 and a bracket 12.
[0026]
The base panel 11 is formed by deep-drawing a metal panel, and has a storage portion 14 having a semicircular cross section that is open forward at the rear end. The front end 15 of the base panel 11 is slightly inclined to the outside of the vehicle in order to control the deployment direction of the airbag 3, and a bead 16 protruding outward from the front end 15 is formed along the vertical direction. Is formed. The bead 16 avoids interference between the airbag 3 deployed forward and the terminal edge of the front end 15.
[0027]
An elongated hole 17 is formed in the base panel 11 at a position near the storage section 14 so as to extend vertically in the front-rear direction. The long hole 17 is formed for inserting the bolt 5 so as to be able to move back and forth, and its front end is located on the front side of the storage part 14, and its rear end is aligned with the opening position of the storage part 14. I do. Above and below the long hole 17, slit-shaped notches 18 as "first engagement portions" are formed along the front-rear direction. The rear end of the notch 18 is located forward of the rear end of the elongated hole 17 by a distance d (see FIG. 2). When the base panel 11 is formed, the storage portion 14 is press-formed after forming the long hole 17 and the cutout portion 18. However, when the rear end of the cutout portion 18 is too close to the storage portion 14, the storage portion 14 is formed. At the time of press molding, the notch 18 is bent and deformed, and the alignment with the bead 22 of the bracket 12 is deteriorated, and positioning becomes difficult. For this reason, the rear end of the notch 18 is positioned ahead of the rear end of the long hole 17 by the dimension d so as not to be affected by the press forming of the storage section 14.
[0028]
The bracket 12 is attached between the base panel 11 and the seat back frame 13, has a vertically long shape as a whole, and has upper and lower bent portions 19, 20 directed toward the outside of the vehicle. . A locking hole 21 is formed in the upper bent portion 19 so that the clip 8 provided in the middle of the harness 7 can be locked in the locking hole 21.
[0029]
The bracket 12 has a bead portion 22 as a “second engagement portion” corresponding to the cutout portion 18 of the base panel 11. Since the bead portion 22 and the notch portion 18 can be simultaneously formed when the bracket 12 and the base panel 11 are pressed, respectively, the bead portion 22 and the notch portion 18 are easily formed. It is also conceivable to provide the function of the notch 18 to the long hole 17. That is, it is conceivable that the bead portion 22 and the insertion hole 24 of the bracket 12 are formed so as to be offset in a straight line in the front-rear direction, and the front and rear portions of the long hole 17 are used as notches. However, in this case, if the bead portion 22 and the insertion hole 24 are close to each other, the portion of the bead portion 22 on the insertion hole 24 side may be pulled during press forming, and the insertion hole 24 may be deformed. Also, since it is desired to make the width of the bracket 12 as small as possible for miniaturization and weight reduction, it is desirable that the long hole 17 and the notch 18 are formed in different parts by being shifted laterally as in this embodiment.
[0030]
The bead portion 22 is of a size that can be engaged in the cutout portion 18, and has a front cut end surface 23 at the front end. In the base panel 11, an insertion hole 24 is formed at a position corresponding to the rear end of the elongated hole 17 in a state where the cut end surface 23 of the bead portion 22 is engaged with the front end of the notch 18. I have. The insertion hole 24 has a diameter matching the bolt 5, and the bolt 5 cannot move in the insertion hole 24. It is desirable that the cut and raised end surface 23 of the bead portion 22 be cut and raised in order to engage with the front end of the cutout portion 18. The end surface of the bead portion 22 opposite to the cut and raised end surface 23 is damaged by the housing 2. It is desirable to have a curved surface so as not to add a mark.
[0031]
Next, an operation procedure for attaching the housing 2 to the seat back frame 13 using the base panel 11 and the bracket 12 will be described.
[0032]
First, the bolt 5 of the housing 2 is inserted into the front end of the long hole 17 formed in the base panel 11. Then, the bolt 5 is moved to the rear end position in the long hole 17, and the rear end of the housing 2 is stored in the storage section 14.
[0033]
Next, the bracket 12 is applied to the base panel 11 from the inside of the vehicle. Then, the bolt 5 protruding from the rear end of the long hole 17 is passed through the insertion hole 24 of the bracket 12, and the bead 22 of the bracket 12 is engaged with the notch 18. In this state, the cut-and-raised end face 23 of the bead portion 22 engages with the front end of the notch portion 18, so that the forward movement of the bracket 12 with respect to the base panel 11 is restricted, and at the same time, the bolt 5 is inserted into the through-hole 24 of the bracket 12. Is also restricted from moving forward.
[0034]
Therefore, in this state, the housing 2, the base panel 11, and the bracket 12 may be held by hand and attached to the seat back frame 13, but in this embodiment, the temporary fixing ring 25 having a star-shaped hole is bolted. 5, the housing 2, the base panel 11, and the bracket 12 are temporarily fixed integrally. In this way, by temporarily fixing the three members together, the mounting workability when mounting to the seat back frame 13 is improved.
[0035]
The harness 7 of the inflator 4 is locked via a clip 8 in a locking hole 21 of a bent portion 19 formed at the upper end of the bracket 12. Since the bent portion 19 integral with the bracket 12 is used for locking the harness 7, the number of components does not increase.
[0036]
Thereafter, if the bolt 5 protruding from the insertion hole 24 of the base panel 11 is passed through the seat back frame 13 and fixed with a nut 26, the mounting of the housing 2, the base panel 11, and the bracket 12 is completed.
[0037]
According to this embodiment, the forward movement of the bracket 12 with respect to the base panel 11 is restricted by the engagement between the notch portion 18 and the bead portion 22, and the bolt 5 of the housing is inserted into the insertion hole 24 of the bracket 12. The forward displacement of the housing 2 is prevented. Therefore, the work of attaching the housing 2 and the base panel 11 to the seat back frame 13 becomes easy.
[0038]
In the above description, an example in which the cutout portion 18 is formed in the base panel 11 and the bead portion 22 is formed in the bracket 12 is shown. However, the shape may be reversed or may be different from each other. In short, it is sufficient if there are first and second engagement portions that can engage with each other in the front-rear direction and restrict the forward movement of the bracket 12 with respect to the base panel 11.
[Brief description of the drawings]
FIG. 1 is a side view showing a side collision airbag device according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a state before assembling a harness, a base panel, and a bracket.
FIG. 3 is a perspective view showing a state after assembling a harness, a base panel, and a bracket.
FIG. 4 is a cross-sectional view taken along the line SA-SA shown in FIG.
FIG. 5 is a sectional view taken along the line SB-SB shown in FIG.
FIG. 6 is a sectional view taken along the line SC-SC shown in FIG. 3;
[Explanation of symbols]
2 Housing 3 Airbag 4 Inflator 5 Bolt 7 Harness 11 Base panel 12 Bracket 13 Seat back frame 14 Storage section 15 Front end 16 Bead 17 Long hole 18 Notch (first engagement section)
19 Bent part 22 Bead part (second engagement part)
23 Cut and raised end surface 24 Insertion hole 25 Temporary fixing ring

Claims (5)

A cross-section in which an airbag and an inflator are housed in a housing, and bolts of the inflator are projected outward from a rear end of the housing, and are opened forward at a rear end of a base panel fixed to a seat back frame from the vehicle outside. By forming a housing portion having a shape toward the outside of the vehicle and forming a long hole in the base panel into which a bolt of the housing can be freely moved back and forth, and moving the bolt in the long hole backward, the housing of the housing is formed. The rear end portion is stored in the storage portion of the base panel,
A first engagement portion and a second engagement portion that engage with the base panel and a vertically long bracket attached between the base panel and the seat back frame in the front-rear direction to restrict forward movement of the bracket with respect to the base panel; An airbag device for a side collision of an automobile, wherein a joining portion is formed, and an insertion hole for restricting a forward movement of the bolt by inserting a bolt of the housing into the bracket is formed. It is a side collision airbag apparatus of the automobile of Claim 1, Comprising:
A side collision airbag device for an automobile, wherein a temporary fixing ring is attached to a bolt passing through an insertion hole of a bracket. An automobile side collision airbag device according to claim 1 or claim 2,
The first engaging portion is a notch portion, the second engaging portion is a bead portion engaged in the notch portion, and the front end of the bead portion engaging with the front end of the notch portion is a vertical cut start end surface. A side collision airbag device for an automobile. An automobile side collision airbag device according to any one of claims 1 to 3,
An airbag device for a side collision of an automobile, wherein a bent portion toward the outside of the vehicle is integrally formed at an upper end or a lower end of a bracket, and a harness of an inflator is locked to the bent portion. An automobile side collision airbag device according to any one of claims 1 to 4,
An airbag device for a side collision of an automobile, wherein a front end portion of a bracket is inclined outwardly of a vehicle, and a bead projecting outwardly of the vehicle is formed in the front end portion along a vertical direction.

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