JP2002087208A - Installing structure of seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installing structure of a seat belt device capable of reducing force applied to a seat belt installing part from a seat belt at vehicle collision time. SOLUTION: In this installing structure of the seat belt 11 for installing a retractor 12 on a bracket 13 installed on a floor panel 5, upwardly turning the seat belt 11 pulled out backward from the retractor 12 along a back face 3a of a seat back 3 and fixing the end part 11a to the floor panel 5 side by passing through a front face 3c of the seat back 3 from an upper end part 3b of the seat back 3, the end part 11a of the seat belt 11 is fixed to a belt fixing part 13c formed in front of the bracket 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat belt mounting structure.

[0002]

2. Description of the Related Art A conventional seat belt mounting structure for a vehicle is disclosed in Japanese Patent Application Laid-Open No. H11-240414.

[0003] This seatbelt mounting structure is such that when the vehicle body strength member does not exist near the left and right sides of the occupant, the occupant can be seated three times.
When restrained by a point-type seat belt, place the retractor on the seat cushion frame below the seat cushion or on the floor panel at the approximate center of the vehicle in the front-rear direction below the seat cushion, and pull out the seat belt from the lower part of the seat back through the back through the upper part. It was done.

[0004]

However, according to the above-mentioned conventional structure, the seat belt pulled out from the retractor is first pulled out rearward and reaches the rear end of the seat cushion, and then the seat back is pulled out. The direction is largely changed upward along the back, inserted into the ring-shaped anchor provided at the upper end of the seat back, and pulled out forward from the upper part of the seat back,
The front end of the seat belt passing through the ring-shaped anchor is always fixed to an anchor portion separately provided on a frame or the like of a seat cushion which is a vehicle body strength member near the side of the occupant.

[0005] For this reason, at the time of a vehicle collision, all the tension acting on the retractor through the seat belt is applied to the mounting portion of the retractor. Therefore, it is necessary to increase the rigidity of the mounting portion of the retractor. Or measures such as enlarging the bracket are necessary,
There has been a problem that the weight and cost are increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat belt device mounting structure capable of reducing a force applied from a seat belt to a seat belt mounting portion in a vehicle collision.

[0007]

According to the first aspect of the present invention, a retractor is attached to a bracket attached to a floor panel, and a seat belt pulled rearward from the retractor is attached to the back of the seat back. In the seat belt mounting structure, which is fixed upward to the upper side of the seat back, passes through the front surface of the seat back, and is fixed to the belt fixing portion on the floor panel side, the belt fixing portion is formed on the bracket. It is characterized by:

According to a second aspect of the present invention, the retractor according to the first aspect is disposed near a lower portion of a seat back.

According to a third aspect of the present invention, a cover member is attached to the back of the seat back according to the first or second aspect, and a seat belt is disposed between the seat back and the cover member. It is characterized by:

According to a fourth aspect of the present invention, a vertically extending concave groove is formed on the back side of the seat back on which the seat belt according to the third invention is disposed, and a loop-shaped guide is formed in the concave groove. A guide member having a portion is fixed, and the seat belt is disposed so as to pass through the inside of the loop-shaped guide portion.

According to a fifth aspect of the present invention, there is provided an arc-shaped groove for turning a seat belt, which is disposed along a back surface of the seat back, above the seat frame of the seat back according to the third aspect. And a seat belt guided by the sliding member is extended forward from the finisher provided on the seat back to the front of the seat back.

[0012]

According to the first aspect of the present invention, the tension applied to the bracket from the seat belt at the time of collision of the vehicle depends on the direction of the tension applied from the end of the seat belt to the belt fixing portion and the direction of the tension applied to the retractor. Are almost opposite to each other, so that they are offset and a small resultant force due to each tension is applied to the mounting structure of the bracket and the floor panel. Therefore, since it is not necessary to provide a reinforcing structure separately at the mounting portion between the bracket and the floor panel or to take measures such as enlarging the bracket, the weight can be reduced and the cost can be advantageously obtained. .

According to the second aspect of the invention, the same operation and effect as those of the first aspect can be obtained.
Because the seat belt pulled out from the retractor is arranged along the back of the seat back without bending as it is,
The pull-out resistance of the seat belt from the retractor is reduced, and the operability of the seat belt is improved.

According to the third aspect of the present invention, the same operation and effect as those of the first or second aspect can be obtained, and the seat belt is covered with the cover on the back surface of the seat back. Therefore, the seat belt is not noticeable, and the appearance can be improved.

According to the fourth aspect of the invention, the same operation and effect as those of the third aspect can be obtained.
When luggage is placed behind the seat back, such as in a wagon, there is no risk of the seat belt coming into contact with or being pressed by the luggage, so that the user does not feel uncomfortable while wearing the vehicle and can also prevent damage to the seat belt. .

According to the fifth aspect of the invention, the same operation and effect as those of the third aspect of the invention can be obtained.
Since the tension from the seat belt is received by the strong seat frame, no excessive force is applied to the finisher and the finisher can be made smaller, so it does not give a feeling of protrusion to the upper part of the seat back and looks good Can be improved.

Further, since the seat belt slides with respect to the seat frame via a sliding member having good slidability, the operability of the seat belt and the durability can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a sectional explanatory view of the embodiment, FIG. 3 is a front view of the embodiment, FIG. 4 is a plan view of the embodiment, and FIG. FIG. 6 is a perspective view showing the sliding member of FIG. 5, and FIG.
7 is a cross-sectional view taken along the line VII-VII of FIG. 2, and FIG. 8 is an exploded perspective view showing a mounted state of the guide member of FIG.

Reference numeral 1 denotes a rear seat 1 disposed behind a front row seat constituting a driver seat and a passenger seat of the vehicle. The rear seat 1 includes a seat cushion 2, a seat back 3, and a headrest 4 attached to an upper end 3b of the seat back 3. The seat cushion 2 is attached to a seat frame (not shown) provided on the floor panel 5.

The seat back 3 is configured to be swingable in the front-rear direction with respect to the seat cushion 2 by a reclining mechanism (not shown).

The rear seat 1 has a width of 3 in the vehicle width direction.
The seatbelt device 10 according to the present invention is applied to an occupant (P) who is seated at the center of the seatbelt. The seat belt device 10 is a so-called three-point seat belt.

The retractor 1 is located below the seat back 3.
2 is attached to the floor panel 5 via the bracket 13.

The bracket 13 is formed by bending and formed so as to be positioned above the floor panel 5 in a state of being floated upward in parallel with the surface of the floor panel 5, and is formed continuously with the retractor mounting portion 13 a and mounted on the floor panel 5. A belt fixing portion 13c for connecting the end 11a of the seat belt 11 is formed at the front end of the retractor mounting portion 13a.

The vehicle body mounting portion 13b of the bracket 13 is fastened to the floor panel 5 by two bolts 14.

Further, the retractor 12 is disposed so as to extend the seat belt 11 toward the rear. In this embodiment, in particular, in the present embodiment, the seat belt 11 pulled out from the retractor 12 is
It is installed at a position where it can extend upward along the back surface 3a of the camera.

A groove 21a is formed in the seat back panel 21 on the back surface 3a side of the seat back 3 as a passage for the seat belt 11, and a loop-shaped guide portion 22a of a guide member 22 installed in the groove 21a. , A seat belt 11 is inserted. The guide member 22 is the seat back panel 21
Is fixed by engaging the engaging claw 22b with the engaging hole 21b.

A seat back board 24 as a cover member is attached to the back surface 3a of the seat back 3. The seat back panel 21 and the seat back board 2
4, a seat belt 11 is provided.

A sliding member 23 having an arc-shaped groove 23a is installed above the seat back frame 20 in the seat back 3. After extending upward along the back surface 3a of the seat back 3, the seat belt 11 is turned forward and upward by the sliding member 23.

A finisher 15 having a guide hole 15a is fixed to the upper end 3b of the seat back 3 in the vicinity of the side of the headrest 4 for the central seat, and the finisher 15 is formed by an engaging claw 15b extending downward. Thus, it is engaged with the upper end 3 b of the seat back 3. The finisher 15 has a guide hole 15a penetrating from the lower rear to the upper front.

The seat belt 11 extending from the sliding member 23 is inserted through the guide hole 15a of the finisher 15,
It extends outside the seat back 3. The end portion 11 a of the seat belt 11 that has passed through the finisher 15 is connected to a belt fixing portion 13 c of the bracket 13.

The seat belt 11, as shown in FIG.
From below the seat back 3, the retractor 12 is positioned in the vehicle width direction.
The finisher 15 is disposed upward along the back surface 3a of the seat back 3 while maintaining a position substantially the same as the position of the finisher 15 at the upper end 3b of the seat back 3.
Guide hole 15a is positioned.

Reference numeral 17 denotes a buckle fixed to the floor panel 5 through a gap between the seat cushion 2 and the seat back 3 near the right side of the occupant (P).

The finisher 15 of the seat belt 11
The tongue 16 is provided between the and the belt fixing portion 13c so that the seat belt 11 is inserted through the insertion hole 16a of the tongue 16. The engaging projection 16b formed on the tongue 16 is removably inserted into the locking hole 17a of the buckle 17, and holds the occupant (P) by the seat belt 11.

The buckle 17 has a built-in lock mechanism (not shown). When the engagement projection 16b of the tongue 16 is locked, the buckle 17 is automatically locked, and the engagement projection 16b of the tongue 16 is locked. By operating a lock release button (not shown) provided on the buckle 17, the lock is released, and the tongue 16 can be pulled out from the buckle 17.

Next, the operation of the present embodiment will be described.

The load of the occupant (P) applied to the seat belt 11 at the time of a vehicle collision is expressed as the tension of the seat belt 11 as
Belt fixing portion 13c of bracket 13 and retractor 1
2 is input to the retractor mounting portion 13a to which the 2 is mounted and the buckle 17.

At this time, as shown in FIG. 2, the tension A from the substantially rearward direction input to the retractor 12 via the seat belt along the back surface 3a of the seat back 3 and the input from the belt fixing portion 13c are applied to the bracket 13. The force is transmitted as the tension of the seat belt 11 from two directions of the tension B substantially from the front direction, and the resultant force C is applied to the mounting bolt 14 of the bracket 13 as a combined force of the tensions A and B.

Further, since these tensions A and B act in directions substantially opposite to the vehicle longitudinal direction, they cancel each other, and the angle formed by these tensions A and B is largely open in the longitudinal direction. The resultant force C is a value smaller than the value obtained by adding the tension A and the tension B.

Therefore, according to the structure of the above embodiment,
Since the mounting portion of the bracket 13 to the floor panel 5 does not require any special measures for increasing the rigidity, it is possible to avoid an increase in weight and an increase in the size of the bracket due to the reinforcement of the bracket 13 and the floor panel 5 and to reduce the cost. it can.

Further, in this embodiment, the position of the retractor 12 and the position of the guide hole 15a of the finisher 15 are set to substantially coincide with each other in the vehicle width direction. No bending force or the like in the vehicle width direction acts between the retractor 12 and the finisher 15.

Further, since the seat belt 11 pulled out from the retractor 12 is disposed along the back surface 3a of the seat back 3 without bending at the lower portion of the seat back 3, the seat belt 11 is pulled out from the retractor 12 of the seat belt 11. Of the seat belt 11 can be reduced, and the operability of the seat belt 11 can be improved.

Further, on the back surface 3a of the seat back 3, since the seat belt 11 is covered by the seat back board 24, the seat belt 11 is not noticeable, and the appearance can be improved.

Also, even if the luggage placed behind the seat back 3 moves forward due to inertia during traveling of the vehicle, the seat belt 11 is kept in the loop-shaped guide portion 22a of the guide member 22 disposed in the groove 21a. , The seat belt 11 does not come into contact with or is pressed by the luggage, and the seat belt 11 does not feel uncomfortable when worn.
Without damaging it.

Further, since the guide member 22 is mounted on the seat back panel 21 by the engagement claws 22b, the mounting workability is good.

Further, since the strong tension from the seat belt 11 is received by the strong seat back frame 20, the finisher 15 is not subjected to excessive force from the seat belt 11, and the finisher 15 is made compact. The appearance can be improved without a feeling of protrusion.

In addition, since the seat belt 11 slides with respect to the seat back frame 20 through the sliding member 23 having good slidability by the arc-shaped groove 23a, the operability of the seat belt 11 is improved. The durability can be improved, and the sliding member 23 is mounted on the seat back frame 20 by the engagement claws 23b, so that the mounting workability is good.

Although this embodiment shows an example in which the present invention is applied to a seatbelt for a central occupant of the rear seat 1, the present invention is not limited to this, and is applicable to a front seat or a side seat. Needless to say.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an explanatory sectional view of the embodiment.

FIG. 3 is a front view of the embodiment.

FIG. 4 is a plan view of the embodiment.

FIG. 5 is an enlarged view of a main part of FIG. 2;

FIG. 6 is a perspective view showing the sliding member of FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 2;

FIG. 8 is an exploded perspective view showing an attached state of the guide member of FIG. 7;

[Explanation of symbols]

 Reference Signs List 3 seat back 3a back 3b upper end 3c front 5 floor panel 10 seat belt device 11 seat belt 11a end 12 retractor 13 bracket 13c belt fixing portion 20 seat back frame 21 seat back panel 21a groove 22 guide member 22a guide portion 23 slide Moving member 23a Groove

Claims (5)

[Claims] 1. A retractor is attached to a bracket attached to a floor panel, and a seat belt pulled rearward from the retractor faces upward along a back surface of the seat back, and the seat back is pulled from an upper end portion of the seat back. In a seat belt mounting structure fixed to a belt fixing portion on a floor panel side through a front surface, the belt fixing portion is formed on the bracket. 2. The seat belt mounting structure according to claim 1, wherein the retractor is disposed near a lower portion of a seat back. 3. The invention according to claim 1, wherein a cover member is attached to a back surface of the seat back, and a seat belt is disposed between the seat back and the cover member. Characteristic seat belt mounting structure. 4. The invention according to claim 3, wherein a concave groove extending in the vertical direction is formed on the back side of the seat back on which the seat belt is provided, and a loop-shaped guide portion is formed in the concave groove. A seat belt mounting structure, wherein a guide member having the seat belt is fixed and disposed so that the seat belt is inserted through the loop-shaped guide portion. 5. The invention according to claim 3, further comprising an arc-shaped groove formed in an upper portion of the seat frame of the seat back for turning a seat belt disposed along a back surface of the seat back forward. A seat belt mounting structure, wherein a sliding member is provided, and a seat belt guided by the sliding member extends forward of the seat back from a finisher provided on an upper portion of the seat back.