JP6825417B2 - Vehicle seatbelt guide structure - Google Patents

Description

The present invention relates to a vehicle seatbelt guide structure in which a three-point seatbelt is inserted into a belt guide provided on the shoulder of a vehicle seat back.

In the vehicle occupant restraint device described in FIGS. 10 to 13 of Patent Document 1 below, the intermediate portion of the shoulder belt in the three-point seat belt is inserted through the belt guide. This belt guide is movable in the vehicle width direction along a slide rail fixed to the shoulder opening (shoulder) of the seat back, is urged inward in the vehicle width direction by a spring, and is urged inward by a stopper. Movement is restricted. When this stopper is moved by the micro gas generator at the time of a frontal collision, the above regulation is released, and the belt guide is moved inward in the vehicle width direction by the spring. As a result, the belt path of the shoulder belt is changed to the inward side in the vehicle width direction to reduce the chest deflection when the occupant is restrained.

Further, in the vehicle occupant restraint device described in FIG. 14 of Patent Document 1 below, the belt guide, which is similarly movable in the vehicle width direction, is within the vehicle width direction by a micro gas generator (inflator) at the time of a frontal collision. Moved to the side. As a result, the same effect as described above is obtained.

Japanese Unexamined Patent Publication No. 2016-88335

However, each of the vehicle occupant restraint devices is complicated in configuration because it requires a control device for electrically controlling the operation of the micro gas generator.

In consideration of the above facts, an object of the present invention is to obtain a vehicle seatbelt guide structure capable of reducing chest deflection during occupant restraint with a simple configuration.

The vehicle seatbelt guide structure according to the first aspect of the invention is provided on the shoulder of the seatback of the vehicle seat, and has a belt insertion hole through which a three-point seatbelt for restraining an occupant is inserted. , The belt guide that supports the seatbelt in a state where the seatbelt is bent so as to be convex upward toward the vehicle with the insertion portion into the belt insertion hole as the apex, and the vehicle width direction toward the upper side of the vehicle. It has left and right legs that are inclined toward the direction, and a guide fixing portion that is bridged between the upper ends of the left and right legs and to which the belt guide is fixed, and the belt guide is fastened to the seat back. The belt guide is provided with a support member that moves the belt guide inward in the vehicle width direction by plastically deforming due to the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle . One end of the seat belt in the longitudinal direction is locked to a spool of a retractor arranged on the rear side of the vehicle of the seat back, and the belt guide is on the shoulder of the occupant and on the upper side of the vehicle with respect to the retractor. Have been placed .

In the invention according to claim 1, the three-point seat belt that restrains the occupant is inserted into the belt insertion hole of the belt guide provided on the shoulder of the seat back of the vehicle seat. This seat belt is bent so as to be convex toward the upper side of the vehicle with the insertion portion into the belt insertion hole as the apex. Therefore, the belt guide receives a downward load from the seat belt at the time of a frontal collision of the vehicle. That is, when the seat belt bent as described above receives a load from an occupant who is about to inertially move toward the front side of the vehicle and is extended, the belt guide receives a load downward from the vehicle. Further, for example, when the retractor of the seatbelt (retractor) is provided with a pretensioner mechanism, when the seat belt is wound on the retractor by the pretensioner mechanism also, the seat belt is stretched, the belt guide vehicle Receives a downward load.

Here, in the present invention, when the belt guide receives a load downward in the vehicle as described above, the support member supporting the belt guide on the seat back moves the belt guide inward in the vehicle width direction. As a result, the seat belt approaches the occupant's neck and wraps around the clavicle, which has a relatively high resistance value, so that the occupant's chest deflection is reduced. Moreover, since the belt guide is moved by using the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle, electrical control is not required and the configuration is simplified.

Further, in the invention of this, the belt guide is subjected to load of the vehicle lower direction from the seat belt, the support bracket is supported belt guide to the seat back is plastically deformed. As a result, the belt guide is moved inward in the vehicle width direction, so that the support member can be made simple.

Moreover, in the invention of this, the belt guide is subjected to load of the vehicle lower direction from the seat belt, the left and right legs vehicle width of the support bracket is inclined towards the higher vehicle width direction inner side toward the vehicle upper side It collapses inward in the direction. As a result, the guide fixing portion bridged between the upper ends of the left and right legs is moved inward in the vehicle width direction together with the belt guide fixed to the guide fixing portion. In this case, since the left and right legs function like parallel links, the guide fixing portion and the belt guide can be moved inward in the vehicle width direction in a horizontal or substantially horizontal posture.
The vehicle seatbelt guide structure according to the second aspect of the invention is provided on the shoulder of the seatback of the vehicle seat, and has a belt insertion hole through which a three-point seatbelt for restraining an occupant is inserted. , The belt guide that supports the seatbelt in a state in which the seatbelt is bent so as to be convex upward toward the vehicle with the insertion portion into the belt insertion hole as the apex, and the vehicle width direction toward the upper side of the vehicle. It has left and right legs that are inclined toward the direction, and a guide fixing portion that is bridged between the upper ends of the left and right legs and to which the belt guide is fixed, and the belt guide is fastened to the seat back. The belt guide is provided with a support member for moving the belt guide inward in the vehicle width direction by plastically deforming the belt guide due to the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle. One end of the seatbelt in the longitudinal direction is locked to the spool of the retractor fixed to the lower end of the B pillar, and the portion of the seatbelt between the belt guide and the retractor is the B pillar. It is wound around a shoulder anchor attached to the upper part, and the belt guide is a virtual straight line connecting the seat belt winding portion of the shoulder anchor and the shoulder portion of the occupant when viewed from the vehicle width direction. It is located above the vehicle.
In the invention according to claim 2, the three-point seat belt that restrains the occupant is inserted into the belt insertion hole of the belt guide provided on the shoulder of the seat back of the vehicle seat. This seat belt is bent so as to be convex toward the upper side of the vehicle with the insertion portion into the belt insertion hole as the apex. Therefore, the belt guide receives a downward load from the seat belt at the time of a frontal collision of the vehicle. That is, when the seat belt bent as described above receives a load from an occupant who is about to inertially move toward the front side of the vehicle and is extended, the belt guide receives a load downward from the vehicle. Further, for example, when the seatbelt winding device (retractor) is provided with a pretensioner mechanism, the seatbelt is stretched and the belt guide is used as a vehicle when the seatbelt is wound around the retractor by the pretensioner mechanism. Receives a downward load.
Here, in the present invention, when the belt guide receives a load downward in the vehicle as described above, the support member supporting the belt guide on the seat back moves the belt guide inward in the vehicle width direction. As a result, the seat belt approaches the occupant's neck and wraps around the clavicle, which has a relatively high resistance value, so that the occupant's chest deflection is reduced. Moreover, since the belt guide is moved by using the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle, electrical control is not required and the configuration is simplified.
Further, in the present invention, when the belt guide receives a load downward from the seat belt to the vehicle, the support bracket that supports the belt guide on the seat back is plastically deformed. As a result, the belt guide is moved inward in the vehicle width direction, so that the support member can be made simple.
Moreover, in the present invention, when the belt guide receives a load downward from the seat belt of the vehicle, the left and right legs of the support bracket inclined so as to move inward in the vehicle width direction toward the vehicle upper side are in the vehicle width direction. Fall inward. As a result, the guide fixing portion bridged between the upper ends of the left and right legs is moved inward in the vehicle width direction together with the belt guide fixed to the guide fixing portion. In this case, since the left and right legs function like parallel links, the guide fixing portion and the belt guide can be moved inward in the vehicle width direction in a horizontal or substantially horizontal posture.

The vehicle seatbelt guide structure according to the third aspect of the present invention includes, in the first or second aspect of the present invention, a stopper that limits the movement of the belt guide to a predetermined range.

In the invention according to claim 3 , the movement of the belt guide inward in the vehicle width direction is restricted to a predetermined range by the stopper. This makes it possible to prevent, for example, the seat belt inserted into the belt insertion hole of the belt guide from getting too close to the neck of the occupant.
In the vehicle seatbelt guide structure according to the fourth aspect of the present invention, in any one of claims 1 to 3 , the belt guide is arranged on the upper side of the vehicle with respect to the neck of the occupant. ..

As described above, in the vehicle seatbelt guide structure according to the present invention, chest deflection during occupant restraint can be reduced with a simple configuration.

It is a side view which looked at the peripheral structure including the seat belt guide structure for a vehicle which concerns on 1st Embodiment of this invention from the outside in the vehicle width direction. It is an enlarged front view which looked at a part of the structure shown in FIG. 1 from the front side of a vehicle. It is a front view corresponding to FIG. 2 which shows the state which the belt guide was moved inward in the vehicle width direction. It is a front view for demonstrating the belt path of a seat belt changed by the movement of a belt guide. It is a front view corresponding to FIG. 2 which shows an example of the fixing method of a belt guide and a support bracket. FIG. 5 is an enlarged cross-sectional view showing a cut surface along the line F6-F6 of FIG. It is a front view corresponding to FIG. 2 which shows another example of the fixing method of a belt guide and a support bracket. FIG. 5 is an enlarged cross-sectional view showing a cut surface along the line F8-F8 of FIG. 7. It is a figure for demonstrating the relationship between the length of a leg of a support bracket, and the amount of movement of a belt guide inward in a vehicle width direction. It is a front view which looked at the peripheral structure including the seat belt guide structure for a vehicle which concerns on 2nd Embodiment of this invention from the front side of a vehicle. It is a front view corresponding to FIG. 10 which shows the state which the belt guide was moved inward in the vehicle width direction. It is a front view corresponding to FIG. 10 which shows an example of a regulation member. It is a front view corresponding to FIG. 12 which shows the state which the belt guide was moved inward in the vehicle width direction. It is a front view corresponding to FIG. 10 which shows another example of a regulation member. It is a front view corresponding to FIG. 14 which shows the state which the belt guide was moved inward in the vehicle width direction. It is a side view which looked at the peripheral structure including the seat belt guide structure for a vehicle which concerns on 3rd Embodiment of this invention from the outside in the vehicle width direction. It is a front view which shows the 1st modification of a support bracket. It is a front view which shows the 2nd modification of a support bracket.

<First Embodiment>
The vehicle seatbelt guide structure 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 9. The arrows FR, UP, and OUT, which are appropriately described in each figure, indicate the front (traveling direction), the upper side, and the outer side in the vehicle width direction of the vehicle, respectively. Hereinafter, when the explanation is simply made using the front-rear, left-right, and up-down directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the left-right direction of the vehicle left-right direction (vehicle width direction), and the up-down direction of the vehicle up-down direction are shown. To do. Further, in each drawing, some reference numerals may be omitted in order to make the drawings easier to see.

(Constitution)
As shown in FIGS. 1 to 3, the vehicle seatbelt guide structure 10 according to the present embodiment includes a belt guide 40 and a support bracket 50 as a support member. The belt guide 40 and the support bracket 50 are provided on the shoulder portion (shoulder opening portion) 22A on the outer side in the vehicle width direction of the seat back 22 of the vehicle seat 20. The belt guide 40 and the support bracket 50 form a part of the vehicle seat 20 and the vehicle three-point seat belt device 30. First, a schematic overall configuration of the vehicle seat 20 and the vehicle three-point seatbelt device 30 will be described, and then the configurations of the belt guide 40 and the support bracket 50 will be described.

(Structure of vehicle seat 20)
The vehicle seat 20 is regarded as the rear seat of the vehicle here, and is arranged on the right side of the vehicle interior. The front-rear, left-right, up-down directions of the vehicle seat 20 coincide with the front-rear, left-right, up-down directions of the vehicle. When the vehicle seat 20 is arranged on the left side of the vehicle interior, the configuration is symmetrical with that of the present embodiment. In the vehicle seat 20, the lower end of the seat back 22 is connected to the rear end of a seat cushion (not shown), and the headrest 24 is connected to the upper end of the seat back 22.

The seat back 22 covers the seat back frame 26 (see FIGS. 2 and 3), which is a skeleton member, the seat back pad (cushion material) (not shown) covered on the seat back frame 26, and the seat back pad. It has a seat back skin 28. The seat back frame 26 includes left and right side frames 26A extending in the vertical direction of the seat back 22 on the left and right sides of the seat back 22 (the left side frame 26A is not shown in FIGS. 2 and 3) and left and right sides. It is provided with an upper frame 26B in which the upper end portion of the side frame 26A is connected in the vehicle width direction. The configuration of the seat back frame 26 is not limited to the above, and can be changed as appropriate.

(Structure of 3-point seatbelt device 30 for vehicles)
As shown in FIG. 1, the vehicle three-point seatbelt device 30 is configured to restrain the occupant P seated on the vehicle seat 20 by a three-point seatbelt (webbing) 32. The occupant P has a physique equivalent to, for example, a dummy of AM50 (50th percentile of an American adult male). One end of the seat belt 32 in the longitudinal direction is locked to a spool 36 of a retractor (webbing take-up device) 34 fixed to a vehicle body (not shown) on the rear side of the vehicle of the seat back 22. The retractor 34 is conventionally known and includes a pretensioner mechanism (not shown). This pretensioner mechanism is, for example, an explosive type, and when a frontal collision of a vehicle is detected, the spool 36 is rotated by the ignition of the explosive to forcibly wind the seat belt 32 around the spool 36 by a predetermined amount. It is configured to take.

The other end of the seat belt 32 in the longitudinal direction is locked to an anchor member (not shown) fixed to the vehicle body near the lower end of the C-pillar (not shown), and is shown in the middle portion of the seat belt 32 in the longitudinal direction. No tongue plate is slidably attached. This tongue plate is connected to a buckle (not shown) provided on the center side of the vehicle seat 20 in the vehicle width direction. As a result, the occupant P seated on the vehicle seat 20 is in a state of wearing the seat belt 32 (a state in which the occupant P is restrained by the vehicle seat 20 by the seat belt 32).

(Structure of belt guide 40 and support bracket 50)
As described above, the belt guide 40 is provided on the shoulder portion 22A of the seat back 22 of the vehicle seat 20. The belt guide 40 is formed of, for example, resin, and is formed in a substantially block shape having a longitudinal direction in the vehicle width direction. The belt guide 40 is formed with a belt insertion hole 40A that penetrates the belt guide 40 in the front-rear direction of the vehicle. The belt insertion hole 40A is formed in a long shape having a longitudinal direction in the vehicle width direction. An intermediate portion (a portion between the retractor 34 and the tongue plate) of the seat belt 32 in the longitudinal direction is slidably inserted into the belt insertion hole 40A.

When the seatbelt of the occupant P is fastened, the portion of the seatbelt 32 between the belt guide 40 and the tongue plate becomes the shoulder belt 32S that restrains the shoulder portion S and the chest C of the occupant P, and the tongue on the seatbelt 32. The portion between the plate and the anchor member is a lap belt (not shown) that restrains the abdomen B and the waist L (see FIG. 4) of the occupant P.

A support bracket 50 is arranged below the belt guide 40 and at the upper end of the seat back 22. The support bracket 50 is attached to the upper frame 26B of the seat back frame 26 via a mounting bracket 52 arranged below the support bracket 50. The mounting bracket 52 is made of metal, for example, and has a rectangular parallelepiped outer shape having a longitudinal direction in the vehicle width direction. The mounting bracket 52 is fixed to the upper surface of the upper frame 26B described above by means such as welding. The mounting bracket 52 may be omitted, and the support bracket 50 may be mounted directly on the seat back frame 26.

The support bracket 50 is formed by, for example, bending a sheet metal, and has a substantially hat shape when viewed from the front-rear direction of the vehicle. Specifically, the support bracket 50 includes left and right legs 50A and 50B extending substantially in the vertical direction of the vehicle, and guide fixing portions 50C bridged between the upper ends of the left and right legs 50A and 50B. The left and right flange portions 50D and 50E are provided so as to extend from the lower ends of the left and right leg portions 50A and 50B to opposite sides.

The left and right flange portions 50D and 50E are overlapped on the upper surface of the mounting bracket 52, and are fixed to the mounting bracket 52 by means such as welding and bolt fastening. The left and right legs 50A and 50B are slightly inclined with respect to the vehicle vertical direction so as to move inward in the vehicle width direction toward the upper side of the vehicle, and the guide fixing portion 50C is horizontal or horizontal in the vehicle width direction. It extends almost horizontally. The belt guide 40 described above is fixed to the guide fixing portion 50C. As a result, the belt guide 40 is supported by the seat back frame 26 via the support bracket 50. The belt guide 40 projects from the upper surface of the seat back 22 to the upper side of the seat, and the portion where the belt insertion hole 40A is formed is located on the outer side (upper side) of the seat back 22. The method of fixing the belt guide 40 and the guide fixing portion 50C (support bracket 50) will be described later.

A stopper 60 is arranged on the inner side of the support bracket 50 in the vehicle width direction (center side in the vehicle width direction) and on the upper surface side of the mounting bracket 52. The stopper 60 is made of metal, for example, and has a rectangular parallelepiped outer shape. The stopper 60 is fixed to the mounting bracket 52 by means such as welding. The stopper 60 faces the left leg 50D of the support bracket 50 from the inner side in the vehicle width direction, and is arranged apart from the left leg 50D. The stopper 60 may be formed integrally with the mounting bracket 52, or the stopper 60 may be fixed to the upper frame 26B (seat back frame 26).

Here, in the present embodiment, as shown in FIG. 1, the retractor 34 located on the vehicle rear side of the seat back 22 is arranged on the vehicle lower side than the belt guide 40. The belt guide 40 is arranged on the upper side of the vehicle with respect to the shoulder portion S of the occupant P. Therefore, the longitudinal intermediate portion of the seat belt 32 inserted into the belt insertion hole 40A of the belt guide 40 is bent so as to be convex upward on the vehicle side with the insertion portion 32A into the belt insertion hole 40A as the apex. That is, the belt guide 40 supports the intermediate portion of the seat belt 32 in the longitudinal direction in a bent state as described above.

Further, the retractor 34 is provided with a pretensioner mechanism as described above. When this pretensioner mechanism operates during a frontal collision (during sudden deceleration) of the vehicle, the seatbelt 32 is forcibly wound around the spool 36 by a predetermined amount (see arrow R in FIG. 1). At this time, the longitudinal intermediate portion of the seatbelt 32 is extended between the shoulder portion S of the occupant P and the spool 36, so that the belt guide 40 receives an excessive load downward from the seatbelt 32. It has a configuration (see arrow F in FIGS. 1 and 3).

Further, at the time of a frontal collision of the vehicle, the seat belt 32 is pulled by the occupant P (see the arrow D in FIG. 1) because the occupant P tries to inertially move to the front side of the vehicle (see the arrow M in FIG. 1). As a result, when the seatbelt 32 is stretched, the belt guide 40 is configured to receive an excessive load downward from the seatbelt 32 (see arrow F in FIG. 1). That is, in the present embodiment, the belt guide 40 is configured to receive an excessive load downward from the seat belt 32 even when the retractor 34 is not provided with the pretensioner mechanism. Therefore, the retractor 34 may be configured not to have a pretensioner mechanism. In the present embodiment, when the belt guide 40 receives the above-mentioned excessive load, for example, the seat belt 32 receives a load of 100 kN or more due to a frontal collision of the vehicle.

Then, as described above, when the belt guide 40 receives an excessive load downward from the vehicle, the support bracket 50 is plastically deformed. In this case, as shown in FIG. 3, the support bracket 50 has the left and right legs 50A and 50B tilted inward in the vehicle width direction, so that the guide fixing portion 50C is inside the vehicle width direction together with the belt guide 40. It is moved to the side (for details, the inner side in the vehicle width direction and the lower side of the vehicle) (see the arrow ID in FIG. 3). As a result, as shown in FIGS. 3 and 4, the belt path of the shoulder belt 32S is moved inward in the vehicle width direction (see arrow A in FIGS. 3 and 4), and the shoulder belt 32S (seat belt 32). Is configured to approach the neck N of the occupant P. In addition, in FIG. 4, in order to make the explanation easy to understand, the amount of movement of the seat belt 32 is exaggerated and greatly described.

Further, in the present embodiment, when the left and right legs 50A and 50B fall inward in the vehicle width direction as described above, the left leg 50A comes into contact with the stopper 60. As a result, the left leg portion 50A is restricted from falling down, and further plastic deformation of the support bracket 50 is prevented. As a result, the movement of the belt guide 40 inward in the vehicle width direction is restricted to a predetermined range (preset range).

The belt guide 40 and the support bracket 50 may be regarded as a constituent member of the vehicle three-point seatbelt device 30 or a constituent member of the vehicle seat 20. Further, the belt guide 40 and the support bracket 50 may be regarded as constituent members of the vehicle occupant restraint device including the vehicle seat 20 and the vehicle three-point seat belt device 30.

When the belt guide 40 and the support bracket 50 are delivered to the vehicle manufacturing site together with other components of the vehicle three-point seatbelt device 30 and retrofitted to the seat back of the vehicle seat 20, for example, the figure. The configuration is as shown in 5 and 6. In the examples shown in FIGS. 5 and 6, the belt guide 40 is integrally molded with the support bracket 50, so that the guide fixing portion 50C is embedded in the belt guide 40. Further, the left and right flange portions 50D and 50E of the support bracket 50 are configured to be fixed to the mounting bracket 52 by means such as bolt fastening. In this example, when the support bracket 50 is plastically deformed, the upper side (the portion on the belt guide 40 side) of the support bracket 50 is mainly deformed.

On the other hand, when the belt guide 40 and the support bracket 50 are pre-attached to the seat back 22 of the vehicle seat 20 and delivered to the vehicle manufacturing site together with the vehicle seat 20, for example, they are shown in FIGS. 7 and 8. It is configured like this. In the examples shown in FIGS. 7 and 8, the left and right flange portions 50D and 50E of the support bracket 50 are omitted, and the lower ends of the left and right leg portions 50A and 50B are directly fixed to the mounting bracket 52 by means such as welding. Has been done. Further, the belt guide 40 is fixed to the guide fixing portion 50C by a fastener 41 such as a bolt or a rivet. In this example, when the support bracket 50 is plastically deformed, the lower side (the portion on the mounting bracket 52 side) of the support bracket 50 is mainly deformed.

In the above support bracket 50, as shown schematically in FIG. 9, the left and right legs 50A and 50B are shorter when the left and right legs 50A and 50B are longer (see the left side of FIG. 9). The amount of plastic deformation of the support bracket 50 inward in the vehicle width direction (the amount of movement of the belt guide 40 inward in the vehicle width direction) can be made larger than in the case (see the right side of FIG. 9). That is, when the amount of movement U of the upper ends 51 of the left and right legs 50A and 50B to the lower side of the vehicle is the same on the left and right sides of FIG. 9, the upper ends 51 of the left and right legs 50A and 50B are long. The amount of movement A1 inward in the vehicle width direction is larger than the amount of movement A2 of the upper end 51 inward in the vehicle width direction when the left and right legs 50A and 50B are short (A1> A2). Therefore, in the present embodiment, the lengths of the left and right legs 50A and 50B are set to be somewhat longer. Then, by providing the stopper 60, the support bracket 50 is plastically deformed within a range in which the left and right legs 50A and 50B do not fall too much inward in the vehicle width direction. As a result, the amount of movement of the belt guide 40 inward in the vehicle width direction is efficiently secured.

(Action and effect)
Next, the operation and effect of the first embodiment will be described.

In the vehicle seatbelt guide structure 10 having the above configuration, the three-point seatbelt 32 that restrains the occupant P seated on the vehicle seat 20 is inserted into the belt of the belt guide 40 provided on the shoulder portion 22A of the seatback 22. It is inserted through the hole 40A. The seat belt 32 is bent so as to be convex upward of the vehicle with the insertion portion 32A into the belt insertion hole 40A as the apex. Therefore, the belt guide 40 receives a load downward from the seat belt 32 at the time of a frontal collision of the vehicle (see arrow F in FIGS. 1 and 3).

When the belt guide 40 receives a load downward from the vehicle as described above, the support bracket 50 supporting the belt guide 40 on the seat back 22 is plastically deformed. In this case, the left and right legs 50A and 50B of the support bracket 50, which are inclined toward the inward side in the vehicle width direction toward the upper side of the vehicle, fall inward in the vehicle width direction. As a result, the guide fixing portion 50C bridged between the upper ends of the left and right leg portions 50A and 50B is moved inward in the vehicle width direction together with the belt guide 40 fixed to the guide fixing portion 50C. .. As a result, the seat belt 32 approaches the neck portion N of the occupant P and is wrapped around the clavicle having a relatively high resistance value, so that the chest deflection of the occupant P is reduced. Moreover, since the belt guide 40 is moved by utilizing the downward load of the vehicle received from the seat belt 32 at the time of a frontal collision, electrical control is not required and the configuration is simplified.

Further, in the present embodiment, the support bracket 50 is plastically deformed to move the belt guide 40 inward in the vehicle width direction, so that the support member can be made simple. Moreover, when the support bracket 50 is plastically deformed, the left and right legs 50A and 50B fall inward in the vehicle width direction. At this time, since the left and right legs 50A and 50B function like parallel links, the guide fixing portion 50C and the belt guide 40 can be moved inward in the vehicle width direction in a horizontal or substantially horizontal posture. ..

Further, in the present embodiment, the movement of the belt guide 40 inward in the vehicle width direction is restricted to a predetermined range by the stopper 60. Thereby, for example, it is possible to prevent the seat belt 32 inserted into the belt insertion hole 40A of the belt guide 40 from getting too close to the neck portion N of the occupant P.

Next, other embodiments of the present invention will be described. The same components and operations as those of the first embodiment are designated by the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

<Second embodiment>
10 and 11 show a front view of the peripheral configuration including the vehicle seatbelt guide structure 70 according to the second embodiment of the present invention as viewed from the front side of the vehicle. This embodiment is used as a reference example. This embodiment includes a movement guide member 72 as a support member instead of the support bracket 50 according to the first embodiment. The movement guide member 72 is formed of, for example, resin, and is formed in a long substantially block shape having a longitudinal direction in the vehicle width direction. The movement guide member 72 is fixed to the upper surface of the mounting bracket 52 by means such as bolting, and is arranged below the belt guide 40. The upper surface of the movement guide member 72 is an inclined surface 72A having a downward slope toward the inward side in the vehicle width direction, and the lower surface of the belt guide 40 is inclined along the inclined surface 72A. The belt guide 40 is mounted on the inclined surface 72A, and can be moved (sliding) along the inclined surface 72A to the inward side in the vehicle width direction (specifically, the inward side in the vehicle width direction and the lower side of the vehicle). Is connected to the movement guide member 72. That is, the inclined surface 72A has a function of guiding the movement of the belt guide 40 inward in the vehicle width direction.

However, the belt guide 40 is restricted from sliding (moving) by a regulating member (not shown in FIGS. 10 and 11), and is normally held at the initial position shown in FIG. The above-mentioned regulation member releases the above-mentioned regulation when the belt guide 40 receives an excessive load downward from the seat belt 32 at the time of a frontal collision of the vehicle. As a result, the belt guide 40 is configured to slide inward in the vehicle width direction while sliding with the inclined surface 72A.

Further, at the end of the movement guide member 72 on the inward side in the vehicle width direction, a stopper 72B protruding upward on the vehicle is provided, and the belt guide 40 sliding inward in the vehicle width direction as described above is provided. , Contact the stopper 72B (see FIG. 11). As a result, the sliding of the belt guide 40 inward in the vehicle width direction is restricted to a predetermined range.

As the above-mentioned regulating member, for example, the spring 74 (here, the compression coil spring) shown in FIGS. 12 and 13, the share pin 76 shown in FIGS. 14 and 15, and the like can be applied. In the examples shown in FIGS. 12 and 13, a pair of left and right legs 40B and 40C project from the lower surface of the belt guide 40, and a spring 74 is provided between the legs 40B and the stopper 72B on the inner side in the vehicle width direction. It is sandwiched. The spring 74 normally holds the belt guide 40 in the initial position shown in FIG. 12, but when the belt guide 40 receives an excessive load downward from the vehicle, it is compressed as shown in FIG. As a result, the belt guide 40 is configured to be allowed to slide inward in the vehicle width direction.

On the other hand, in the examples shown in FIGS. 14 and 15, the share pin 76 is attached to a portion of the movement guide member 72 on the inner side in the vehicle width direction. The lower side of the share pin 76 is embedded in the movement guide member 72, and the upper side projects upward from the inclined surface 72A. The end face of the belt guide 40 on the inner side in the vehicle width direction is in contact with the share pin 76. As a result, the belt guide 40 is normally held at the initial position shown in FIG. 14, but when the belt guide 40 receives an excessive load downward from the vehicle, the share pin 76 breaks as shown in FIG. .. As a result, the belt guide 40 is configured to be allowed to slide inward in the vehicle width direction. The share pin 76 may be integrally formed with the movement guide member. In this embodiment, the configurations other than the above are the same as those in the first embodiment.

In this embodiment, when the belt guide 40 receives a load downward from the seat belt 32 at the time of a frontal collision of the vehicle, the slide restriction of the belt guide 40 by the regulating member is released, and the belt guide 40 is moved inward in the vehicle width direction. Moved to. As a result, the belt path of the shoulder belt 32S is moved (changed) inward in the vehicle width direction, so that the chest deflection at the time of occupant restraint can be reduced with a simple configuration as in the first embodiment. Moreover, the belt guide 40 moves by adjusting the inclination angle of the inclined surface 72A of the movement guide member 72, the strength of the regulation by the regulating member (for example, the compressive load of the spring 74, the breaking strength of the share pin 76), and the like. The characteristics (movement direction, movement timing, etc.) can be easily adjusted. Further, when the regulating member is the spring 74, the belt guide 40 is returned to the initial position by the spring 74 after the frontal collision of the vehicle, so that there is no need for repair and repeated use is possible.

<Third embodiment>
FIG. 16 shows a side view of the periphery including the vehicle seatbelt guide structure 80 according to the third embodiment of the present invention as viewed from the right side of the vehicle. The vehicle seatbelt guide structure 80 is applied to the vehicle seat 82, which is the front seat of the vehicle. The vehicle seat 82 includes a seat cushion 84, a seat back 86, and a headrest 88, and is arranged on the right side of the vehicle interior. A belt guide 40, a support bracket 50, and a mounting bracket 52 are provided on the shoulder portion 86A on the outer side of the seat back 86 in the vehicle width direction as in the first embodiment. Further, in this embodiment, the retractor 34 is fixed to the lower end portion of the B pillar (not shown), and the shoulder anchor 90 attached to the upper portion of the B pillar has a longitudinal intermediate portion (belt guide 40) of the seat belt 32. The part between the retractor 34 and the retractor 34) is wound around. In FIG. 16, the wrap belt of the seat belt 32 is not shown.

Further, in this embodiment, the belt guide 40 is more than a virtual straight line VL connecting the wound portion of the seat belt 32 in the shoulder anchor 90 and the upper end of the shoulder portion S of the occupant P when viewed from the vehicle width direction. It is located on the upper side of the vehicle. Therefore, the seatbelt 32 is bent so as to be convex upward of the vehicle with the insertion portion 32A of the belt guide 40 into the belt insertion hole 40A (not shown in FIG. 16) as the apex. As a result, in the event of a frontal collision of the vehicle, the belt guide 40 is configured to receive a load downward from the seat belt 32 of the vehicle. Also in this embodiment, basically the same effect as that of the first embodiment can be obtained. Although FIG. 16 shows the case where the support bracket 50 according to the first embodiment is a support member, the support member may be the movement guide member 70 according to the second embodiment.

<Supplementary explanation of the embodiment>
In the first embodiment, the entire left and right legs 50A and 50B of the support bracket 50 are inclined so as to be inclined inward in the vehicle width direction toward the upper side of the vehicle. Not limited. For example, as shown in FIG. 17, the left and right legs 50A and 50B may be bent so as to be convex inward in the vehicle width direction when viewed in the vehicle front-rear direction. In this case, the lengths of the lower portions 50A2 and 50B2 (see the arrow b in FIG. 17) of the left and right legs 50A and 50B, which are inclined toward the inward side in the vehicle width direction toward the upper side of the vehicle, are set above the vehicle. It is preferable that the length is longer than the lengths of the upper portions 50A1 and 50B1 (see the arrow a in FIG. 17) that are inclined toward the outer side in the vehicle width direction toward the side. That way, the amount of movement of the belt guide 40 inward in the vehicle width direction can be increased.

Further, for example, as shown in FIG. 18, of the left and right legs 50A and 50B, only the leg 50B on the outer side in the vehicle width direction is convex inward in the vehicle width direction when viewed in the vehicle front-rear direction. The configuration may be bent to. In this configuration, when the support bracket 50 is plastically deformed by a load downward in the vehicle, the belt guide 40 tends to tilt downward in the vehicle width direction, so that the shoulder belt 32S is the shoulder portion of the occupant P. It becomes easy to maintain the inclined state along the inclination of S.

In addition, the present invention can be implemented with various modifications without departing from the gist thereof. Further, it goes without saying that the scope of rights of the present invention is not limited to each of the above embodiments.

10 Vehicle seat belt guide structure 20 Vehicle seat 22 Seat back 22A Shoulder 32 Seat belt 40 Belt guide 40A Belt insertion hole 50 Support bracket (support member)
50A, 50B Left and right legs 50C Guide fixing part 60 Stopper 70 Vehicle seatbelt guide structure 72 Movement guide member 72A Inclined surface 72B Stopper 74 Spring (regulatory member)
76 Share pin (regulatory member)
80 Vehicle seat belt guide structure 82 Vehicle seat 86 Seat back 86A Shoulder P Crew

Claims (4)

A belt insertion hole is formed on the shoulder of the seat back of the vehicle seat and into which a three-point seat belt that restrains the occupant is inserted, and the seat belt has the insertion portion into the belt insertion hole as the apex of the vehicle. A belt guide that supports the seat belt in a bent state that is convex upward, and
The left and right legs that are inclined toward the inward side in the vehicle width direction toward the upper side of the vehicle, and the guide fixing portion that is bridged between the upper ends of the left and right legs and to which the belt guide is fixed. The belt guide is supported by the seat back, and the belt guide is plastically deformed by the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle, so that the belt guide is inward in the vehicle width direction. With the support member to move to
With
One end of the seat belt in the longitudinal direction is locked to a spool of a retractor arranged on the vehicle rear side of the seat back.
The belt guide has a vehicle seatbelt guide structure that is arranged above the shoulder of the occupant and the retractor. A belt insertion hole is formed on the shoulder of the seat back of the vehicle seat and into which a three-point seat belt that restrains the occupant is inserted, and the seat belt has the insertion portion into the belt insertion hole as the apex of the vehicle. A belt guide that supports the seat belt in a bent state that is convex upward, and
The left and right legs that are inclined toward the inward side in the vehicle width direction toward the upper side of the vehicle, and the guide fixing portion that is bridged between the upper ends of the left and right legs and to which the belt guide is fixed. The belt guide is supported by the seat back, and the belt guide is plastically deformed by the downward load of the vehicle received from the seat belt at the time of a frontal collision of the vehicle, so that the belt guide is inward in the vehicle width direction. With the support member to move to
With
One end of the seat belt in the longitudinal direction is locked to the spool of the retractor fixed to the lower end of the B pillar.
The portion of the seat belt between the belt guide and the retractor is wound around a shoulder anchor attached to the upper part of the B pillar.
The belt guide is a vehicle seat belt arranged above the virtual straight line connecting the wound portion of the seat belt and the shoulder portion of the occupant in the shoulder anchor when viewed from the vehicle width direction. Guide structure. The vehicle seatbelt guide structure according to claim 1 or 2, further comprising a stopper that limits the movement of the belt guide to a predetermined range . The vehicle seatbelt guide structure according to any one of claims 1 to 3, wherein the belt guide is arranged on the upper side of the vehicle with respect to the neck of the occupant .