JP4206729B2 - Seat belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat belt device for a vehicle, and more particularly to an improvement in the aerial stretch shape of a seat belt body.
[0002]
[Prior art]
Conventionally, a vehicle is equipped with a seat belt device for the purpose of protecting an occupant seated on the seat.
[0003]
The seat belt device includes a seat belt body (webbing) having a buckle, a belt retractor that is attached to the vehicle body and winds up the seat belt body, and a seat belt that is provided in the vehicle interior and pulled out from the belt retractor. And a shoulder side anchorage having a through ring for changing a drawing direction.
[0004]
In a general three-point seat belt device, one end side of the seat belt body is fastened to the floor panel, and the buckle is slidable between one end side of the seat belt body and the shoulder side anchorage. Is provided.
[0005]
Also, the shoulder side anchorage is provided on the side or rear pillar trim of the seat, the rear parcel trim at the rear of the passenger compartment, etc.When the seat belt is not used, the seat belt is wound around the belt retractor. The buckle is pulled back to the vicinity of the shoulder side anchorage.
[0006]
On the other hand, when using the seat belt, the occupant seated on the seat grips the buckle in a state where it is pulled back to the vicinity of the shoulder side anchorage, and pulls the buckle so that the seat belt body is put on the shoulder of the occupant itself. The belt body is pulled out of the belt retractor while passing through the shoulder anchorage slewing ring, and the occupant pulls the buckle until the seat belt body passes over his shoulder and is passed over the front of the body. A seat belt is mounted by engaging a buckle with a fitting that extends from the floor (Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-112204
[Problems to be solved by the invention]
By the way, the seat belt body of the above-described seat belt device is in a state where a portion extending from the shoulder side anchorage to the occupant's shoulder is stretched in the air when the seat belt is used.
[0009]
The part stretched in the air (the part stretched in the air) is stretched to some extent because of the tension applied by the belt retractor, but it runs with the vehicle window and sunroof open. Then, the air outside the vehicle flows into the vehicle interior, and the air flow that is directly or directly entrained in the vehicle interior hits the air stretched portion of the seat belt body, and this portion may be beaten and fluttered. .
[0010]
In particular, when the distance between the shoulder side anchorage and the seat is long, the overhanging portion in the air becomes long and is easily affected by this.
[0011]
In addition, in so-called open cars (cars with roofs folded or removed) called so-called convertibles, cabriolet, etc., the amount of air passing through the passenger compartment is so large that this fluttering becomes prominent. .
[0012]
Furthermore, some of these open cars do not have pillars themselves. In such cars, the shoulder side anchorage is provided at the rear of the vehicle, such as the rear parcel trim, and the overhanging part in the air may be considerably long. Tend to be even more intense.
[0013]
Such fluttering of the seat belt main body is transmitted as unpleasant vibration to the occupant's body where the seat belt main body is in close contact with the body.
[0014]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a seat belt device that can suppress fluttering that occurs in an airborne portion of a seat belt body.
[0015]
[Means for Solving the Problems]
In order to solve the above-described problems, a seat belt device according to the present invention is a device in which the rigidity of the belt main body is enhanced by curving the aerial stretch portion of the seat belt main body.
[0016]
That is, the seat belt device according to the present invention has a seat belt body that extends from a shoulder side anchorage attached to a vehicle body, passes through a shoulder portion of an occupant seated on the seat, and is stretched over the front surface of the occupant. the belt device, the seat belt body, at least a portion of the aerial clad spanning portions ranging from the shoulder side anchor portion to the shoulder portion of the occupant, with curved section for curving the width direction of the seat belt body, said curved The means is a seat belt guide, and the seat belt guide has a slit between the shoulder side anchorage and the seat that passes through the seat belt body and curves in the width direction of the seat belt body. A mounting portion attached to the vehicle body, and an arm connecting the mounting portion and the guide. Characterized in that it comprises a part.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of a seat belt device according to the present invention will be described with reference to the drawings.
[0018]
As shown in FIG. 2A, the seat belt device 10 according to the present embodiment extends from the shoulder side anchorage 20 attached to the rear portion 120 of the vehicle body, and shoulders the occupant 200 seated on the seat 110. 210, and has a seat belt main body 80 which is stretched over the front surface of the occupant 210, and at least a part of the aerial stretch portion of the seat belt main body 80 from the shoulder side anchor portion 20 to the shoulder portion 210 of the occupant 200. Is provided with a bending means for bending the seat belt main body 80 in the width direction.
[0019]
Here, since the seat belt device 10 of this embodiment is attached to a convertible vehicle having, for example, a two-seater, which does not have a pillar, the shoulder side anchorage 20 is attached to the rear portion (rear tray panel or the like) 120 of the passenger compartment. Although it is attached, the present invention is not limited to this form, and any form other than a convertible car or a convertible car may have a form attached to a pillar or the like if it has a pillar.
[0020]
Needless to say, even in the case of a vehicle type having pillars or the like, a form attached to a rear panel or the like can be adopted as in FIG.
[0021]
The seat belt device 10 further includes a belt retractor 70 that is fixed inside the passenger compartment rear portion 120 and winds up the seat belt main body 80, and a coupling fitting (passage through the seat belt main body 80) provided on the floor beside the seat 110. A buckle (not shown) is provided which is engaged with a not shown.
[0022]
As shown in FIG. 1, the seat belt main body 80 is changed in direction so that the pull-out direction from the belt retractor 70 is directed forward of the vehicle by the slit 23 formed in the through ring 22 of the shoulder side anchorage 20. .
[0023]
Further, the bending means is provided between the shoulder side anchorage 20 and the shoulder portion 210 of the occupant 200, and the air belt extending portion of the seat belt main body 80 (the portion floating in the air without touching the other) is provided. The slit 31 is a seat belt guide 30 that has a slit 31 that passes therethrough and is curved upwardly (in the z direction in FIG. 2B) into a convex mountain shape.
[0024]
The seat belt guide 30 is made of resin, but may incorporate a metal core as needed. Specifically, as shown in FIG. 3, a mounting portion 34 to the vehicle rear portion 120 and the slit 31 are formed. The structure includes a guide portion 33 and an arm portion 37 that connects the attachment portion 34 and the guide portion 33.
[0025]
As shown in the exploded view of FIG. 4, the attachment portion 34 of the seat belt guide 30 includes a rotation hole 35 that inscribes the cylindrical spacer 25 of the shoulder side anchorage 20, and includes a fastening bolt 122, a paper washer 27, and a weld. The nut 121 is fastened together with the through ring 22 of the shoulder side anchorage 20 to the rear portion 120 of the passenger compartment.
[0026]
The paper washer 27 is dropped from the shoulder-side anchorage 20 when an assembly process is performed in which the seatbelt guide 30 is assembled with the shoulder-side anchorage 20 in advance and then attached to the rear portion 120 of the passenger compartment. Can be prevented and assembly workability can be improved.
[0027]
The seat belt guide 30 and the through ring 22 are rotatable about the axis of the fastening bolt 122 according to the movement of the seat belt main body 80 passed through the belt hole 38 and the slit 23.
[0028]
The head of the fastening bolt 122 is obscured by the cover 21 of the shoulder side anchorage 20 after fastening.
[0029]
The front end surface 32 of the guide portion 33 has an angle θ (0 ° <0 ° <0 °) so that the outer portion in the vehicle width direction (Y direction) is more forward of the vehicle than the inner portion in the state where the seat belt body 80 is attached to the occupant 200. It is formed so as to be inclined by θ <90 ° (see FIG. 1C).
[0030]
Accordingly, the slit 31 of the guide portion 33 is also inclined with respect to the width direction (Y direction) of the seat belt main body 80 from the shoulder side anchorage 80 to the slit 31.
[0031]
The arm portion 37 is formed in such a length that the slit 31 of the guide portion 33 is positioned approximately in the middle between the shoulder side anchorage 30 and the shoulder portion 210 of the occupant 200.
[0032]
Next, the operation of the seat belt device according to the present embodiment will be described.
[0033]
First, when the occupant 200 is not in use of the seat belt, the seat belt main body 80 is wound around the belt retractor 70, and accordingly, the buckle is pulled back to the guide portion 33 of the seat belt guide 30.
[0034]
On the other hand, when the seat belt is in use, the occupant 200 seated on the seat 110 grips the buckle that is pulled back to the guide portion 33 of the seat belt guide 30, and the seat belt main body 80 is placed on the shoulder portion 210 of the occupant 200 itself. By pulling the buckle so as to hang, the seat belt body 80 passes through the slit 31 of the seat belt guide 30, the slit 23 of the through ring 22 of the shoulder side anchorage 20, and the belt hole 38 of the seat belt guide 30. Pulled out from the retractor 70, the occupant 200 pulls the buckle until the seat belt main body 80 passes over the shoulder 210 of the seat belt and is passed over the front of the body, and engages the buckle with the joint fitting provided on the floor next to the seat. At the same time, the seat belt main body 80 is attached.
[0035]
At this time, the slit 31 of the seat belt guide 30 that is a bending means is three-dimensionally such that at least a part of the air belt extending portion of the seat belt main body 80 has a cross-sectional mountain shape in the width direction of the seat belt main body 80. Curve.
[0036]
Further, the stretched portion that is curved three-dimensionally has rigidity higher than that of the conventional stretched plane, and air flows into the vehicle interior due to the traveling of the vehicle. It is possible to reduce the occurrence of flapping when hitting the stretched portion.
[0037]
Further, since the seat belt device 10 of the present embodiment realizes the bending means with a simple configuration that is simply formed by bending the slit 31 of the seat belt guide 30 into a mountain shape, the seat belt guide 30 itself Is already existing, it is only necessary to change the shape of the slit of the existing seat belt guide so that the above-mentioned cross section in the width direction becomes a mountain shape, and the increase in manufacturing cost is minimized. Can do.
[0038]
In the seat belt device 10 according to the present embodiment, the aerial stretch portion of the seat belt main body 80 is formed in a cross-sectional mountain shape and is curved three-dimensionally, but this three-dimensional curved shape is a mountain shape. It is not limited, and various curved shapes such as a cross-sectional arc shape, a cross-sectional wave shape, and a U-shaped cross-section can be adopted in the width direction of the seat belt main body 80, and the slit of the seat belt guide 30 that is a bending means. It can implement | achieve by forming the shape of 31 in these shapes.
[0039]
Further, the seat belt device 10 of the present embodiment is disposed so that the seat belt guide 30 and the slit 31 are positioned approximately in the middle between the shoulder side anchorage 20 and the shoulder portion 210 of the occupant 200. The center of the swing of the main body 80 is held by the guide portion 33 of the seat belt guide 30, and the flutter can be most effectively suppressed.
[0040]
Further, since the slit 31 of the seat belt guide 30 is inclined by θ with respect to the width direction of the seat belt main body 80 from the shoulder side anchorage 20 to the slit 31, the bending of the seat belt main body 80 by the slit 31 is performed. Even when R is set to a size that does not reduce the winding property of the seat belt main body 80, the rigidity can be increased more than that in which the slit 31 is not inclined with respect to the width direction of the seat belt main body 80. .
[0041]
That is, when the seat belt main body 80 is formed in a mountain shape, the rigidity of the seat belt main body 80 can be increased as the bend R at the apex of the mountain shape is smaller. The sliding resistance of the seat belt main body 80 with respect to 31 increases, and the winding property of the seat belt main body 80 decreases. However, by forming the slit 31 to be inclined with respect to the width direction of the seat belt main body 80, the bending R is increased. Even if it is set large, if the slit 31 is projected in the width direction of the seat belt main body 80 from the shoulder side anchorage 20 to the slit 31, the bending R becomes small on this projection plane.
[0042]
This is because the bending direction component of the seat belt main body 80 in the bending direction R on the slit 31 forming surface, that is, the component contributing to increase the rigidity of the seat belt main body 80 is large. It means that it contributes as bending R smaller than this.
[0043]
Therefore, even when the bending R on the surface on which the slit 31 is formed is set to a size that does not lower the winding property, the rigidity of the seat belt body 80 can be increased without causing deterioration of the winding property. The rigidity can be improved.
[0044]
In the present embodiment, the bend R is formed to 30 to 40 mm when projected onto the cross section in the width direction of the seat belt main body 80, and the bend R of 40 mm or more can be formed on the formation surface of the slit 31. .
[0045]
In this embodiment, if the bending R of the widthwise component of the seat belt main body 80 is smaller than 30 mm, the winding property is lowered, and if it is larger than 40 mm, the effect of improving the rigidity is lowered. It is preferable to set the range.
[0046]
Further, since the seat belt guide 30 is disposed between the shoulder side anchorage 20 and the seat 110 behind the seat 110, the seat 110 is moved rearward or the back portion (seat back) of the seat 110 is moved backward. It is conceivable that the rear surface 111 of the seat 110 interferes with the seat belt guide 30 when it is tilted down.
[0047]
However, the seat belt guide 30 has a mounting portion 34 that is rotatable about the shoulder side anchorage 20, and the front end surface 32 of the seat belt guide 30 is located outside in the vehicle width direction when mounted on the occupant 200. Since the portion is inclined at an angle θ so as to be in front of the vehicle body with respect to the inner portion in the vehicle width direction (FIG. 1 (c)), as shown in the plan view of FIG. Even if the rear surface 111 moves and interferes with the seat belt guide 30, the seat belt guide 30 slips between the front end surface 32 of the seat belt guide 30 and the rear surface 111 of the seat 110 so as to release the pressure received from the seat 110. The seat belt guide 30 rotates so as to swing its head toward the vehicle outer side Ot ((b) in the figure).
[0048]
Therefore, the pressure from the seat 110 does not act on the seat belt guide 30 as it is, and damage to the seat belt guide 30 can be prevented.
[0049]
Further, the seat belt guide 30 is attached to the rear part 120 of the passenger compartment with the attachment portion 34 being fastened together with the shoulder side anchorage 20, so that it is necessary to provide a new attachment structure on the rear part 120 of the passenger compartment. In addition, the cost on the vehicle body side can be reduced.
[0050]
Furthermore, it can be retrofitted to existing vehicles.
[0051]
Further, the existing shoulder side anchorage 20 generally has a rotatable structure at the attachment portion with the rear portion 120 of the passenger compartment, and by using a joint fastening structure that shares this attachment portion. As with the shoulder side anchorage 20, the seat belt guide 30 can easily form a structure that can rotate with respect to the rear portion 120 of the vehicle compartment.
[0052]
[Modification 1]
FIG. 6 is a main part perspective view showing a first modification in which the seat belt guide 30 is attached to the rear part 120 of the vehicle compartment separately from the shoulder side anchorage 20, and the attachment part 34 is the shoulder side anchorage 20. Is attached to the passenger compartment rear portion 120 by a fastening bolt 125 that is separate from the fastening bolt 122 that is attached to the passenger compartment rear portion 120.
[0053]
According to the seat belt device 10 according to the first modified example, since it is not fastened together with the shoulder side anchorage 20, the degree of freedom of the mounting position of the seat belt guide 30 can be increased.
[0054]
[Modification 2]
FIG. 7 is a perspective view showing a principal part of a modification 2 in which the attachment portion 34 of the seat belt guide 30 is formed integrally with the cover 21 of the shoulder side anchorage 20, and covers the attachment portion 34 of the seat belt guide 30. Since the seat belt guide 30 is formed integrally with the cover 21 in common with the cover 21, the number of parts can be reduced as compared with the case where the seat belt guide 30 is formed separately from the cover 21. Cost in terms of surface can be reduced.
[0055]
[Modification 3]
FIG. 8 is a perspective view of a principal part showing a third modification example in which the seat belt guide 30 as the bending means is formed on the side shoulder 115 of the seat 110. Thus, the seat belt guide 30 is fixed to the shoulder 115 of the seat 110. Accordingly, the seat belt guide 30 does not need to adopt a structure in consideration of interference with the seat 110 (FIG. 5), and the seat belt main body 80 is wound in the state where the seat belt main body 80 is wound. However, since the occupant 200 seated on the seat 110 can easily remove the buckle, the seat belt mounting operability can be improved.
[0056]
[Modification 4]
FIG. 9 is a perspective view showing a principal part of a modification 4 in which the bending means is formed in the through ring 22 of the shoulder side anchorage 20, and the edge 24 of the slit 23 formed in the through ring 22 is formed in a mountain shape. It is formed in a curved shape.
[0057]
As described above, according to the fourth modification in which the bending means is formed by forming the slit edge 24 of the through ring 22 in a mountain shape, the bending means can be realized with a simple configuration. It is not necessary to provide the seat belt guide 30 of each embodiment, and the number of parts and the manufacturing cost can be reduced as compared with the case where the seat belt guide 30 is provided.
[0058]
Furthermore, the slit 23 of the through ring 22 is provided with a notch for allowing the seat belt main body 80 to pass through later, so that the existing seat belt device can be used in place of the through ring 22 of the fourth modification. can do.
[0059]
In addition, instead of the seat belt device of the present invention, the shoulder side anchorage is arranged at a low position in the vehicle interior, and it is also possible to exert the effect of reducing the influence of the wind flowing into the vehicle interior, in this case, Since the buckle is pulled back to the vicinity of the low position where the shoulder side anchorage is arranged, it becomes difficult to perform an operation of gripping the buckle and pulling out the seat belt, so that the seat belt mounting operability is deteriorated.
[0060]
On the other hand, in the seat belt device according to each of the above-described embodiments, the shoulder side anchorage is not arranged at a low position in the vehicle interior, so that such mounting operability is not deteriorated.
[0061]
【The invention's effect】
As described above, according to the seatbelt device of the present invention, the rigidity of the air belt extending portion of the seatbelt body is improved, and fluttering due to airflow collision is suppressed.
[0062]
That is, according to the seat belt device of the present invention, the bending means bends at least a part of the air belt extending portion of the seat belt main body in the width direction of the seat belt main body. Rigidity is increased, and flapping of the seat belt body due to air flowing into the vehicle interior can be suppressed.
[Brief description of the drawings]
FIG. 1 is a diagram showing a specific embodiment of a seat belt device according to the present invention, in which (a) is a perspective view, (b) is a side view, and (c) is a plan view.
2A and 2B are views showing a state where the seat belt device shown in FIG. 1 is mounted on a vehicle body, in which FIG. 2A is a side view of a main part, and FIG. 2B is a cross-sectional view showing a cross section taken along line AA in FIG. .
FIG. 3 is a perspective view showing a detailed structure of a seat belt guide.
FIG. 4 is an exploded view showing a state in which the seat belt guide and the shoulder side anchorage are attached to the rear part of the passenger compartment.
FIG. 5 is a plan view for explaining the operation of the seat belt guide when the seat is moved rearward and the rear surface of the seat interferes with the seat belt guide.
FIG. 6 is a perspective view showing a principal part of a modification 1 in which a seat belt guide attaching portion is attached to a rear portion of a passenger compartment separately from a shoulder side anchorage;
FIG. 7 is a perspective view showing a principal part of a second modified example in which a seat belt guide mounting portion is formed integrally with a shoulder side anchorage cover;
FIG. 8 is a main part perspective view showing a third modification in which a seat belt guide as a bending means is formed on a side shoulder portion of a seat.
FIG. 9 is a main part perspective view showing a fourth modification in which the bending means is formed on the through-hole of the shoulder side anchorage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Seat belt apparatus 20 Shoulder side anchorage 21 Cover 22 Through ring 23 Slit 24 Slit edge 25 Spacer 27 Paper washer 30 Seat belt guide 31 Slit 32 Front end surface 33 Guide part 34 Mounting part 35 Turning hole 37 Arm part 38 For belt Hole 70 Belt retractor 80 Seat belt main body 110 Seat 111 Rear surface 115 Shoulder 120 Rear tray panel 121 Weld nut 122 Fastening bolt 125 Fastening bolt 200 Passenger 210 Shoulder Bk Rear of vehicle Fr Front of vehicle Ot Center of rotation O Inclination angle X Longitudinal Direction Y Width direction

Claims (7)

In a seat belt device having a seat belt body extending from a shoulder side anchorage attached to a vehicle body, passing through a shoulder portion of an occupant seated on a seat, and spanned on the front surface of the occupant,
A curving means for curving at least a part of an aerial stretch portion extending from the shoulder side anchor portion of the seat belt main body to the shoulder of the occupant in the width direction of the seat belt main body ;
The bending means is a seat belt guide, and the seat belt guide is
A guide portion having a slit between the shoulder side anchorage and the seat that passes through the seat belt body and curves in the width direction of the seat belt body;
A mounting part to be attached to the vehicle body;
A seat belt device comprising: an arm portion that connects the mounting portion and the guide . The seat belt device according to claim 1, wherein the slit is curved in a mountain shape in a width direction of the seat belt main body .   The seat belt device according to claim 2, wherein the seat belt guide is disposed so that the slit is positioned approximately in the middle between the shoulder side anchorage and the shoulder portion of the occupant.   4. The seat belt device according to claim 2, wherein the slit of the seat belt guide is formed to be inclined with respect to the width direction of the seat belt main body from the shoulder side anchorage to the slit. 5.   The seat belt guide has a mounting portion that is rotatable about the shoulder side anchorage, and the front end surface of the seat belt guide has a vehicle width direction outer portion in a vehicle width direction when mounted on the occupant. The seatbelt device according to any one of claims 2 to 4, wherein the seatbelt device is inclined so as to be in front of the vehicle body relative to the inner portion in the direction.   6. The seat belt device according to claim 2, wherein the seat belt guide includes an attachment portion that is attached to the vehicle body by being fastened together with the shoulder side anchorage. .   6. The seat belt device according to claim 2, wherein the seat belt guide is formed integrally with a cover that covers a body fastening member of the shoulder side anchorage.

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