JP2019034577A - Vehicle seat belt device - Google Patents

Abstract

To make it possible to restrict a submarine phenomenon while ensuring restraint of a chest part of an occupant by means of a shoulder belt.SOLUTION: A vehicle seat belt device 10 comprises: a shoulder belt 12 for restraining a chest part 24C of an occupant 24 seated in a vehicle seat 22; a lap belt 14 for restraining at least one of a waist part 24W and thigh parts 24L of the occupant 24; a buckle 16 fixed to the vehicle seat 22 or a vehicle body; and a tongue plate 18 engaged with the buckle 16 when the belts are attached by the occupant 24, and by which, when the belts are attached, the shoulder belt 12 is connected to the rear of the seat and the lap belt 14 is connected to the front of the seat, thus making it easy to restrain the upper surfaces of the thigh parts 24L of the occupant 24 by means of the lap belt 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat belt device.

  In the tongue, a shoulder side insertion hole (shoulder side folding engagement point) for folding and locking the shoulder belt and a lap side insertion hole (lap side folding locking point) for folding and latching the lap belt are mutually connected. A seat belt device arranged separately is disclosed (see Patent Document 1). According to this seat belt device, the sliding friction between the belt and the tongue is increased, and even when the shoulder belt tension is lowered, the tension of the lap belt can be maintained, and the restraint property of the lap belt can be improved. ing.

JP 2009-196508 A

  In the above-described conventional example, the shoulder-side folding engagement point of the tongue is arranged on the vehicle front side from the lap-side folding engagement point (FIG. 10 of Patent Document 1), so that the shoulder belt passing path (belt path) is set to the vehicle. It can be positioned forward. Accordingly, a gap can be created between the upper body of the occupant and the shoulder belt, and the comfort of the belt can be improved by reducing the feeling of pressure that the shoulder belt exerts on the upper body.

  However, on the other hand, it is conceivable that the restraint of the occupant's chest by the shoulder belt is weakened. In recent years, a seat belt device having a high effect of suppressing the submarine phenomenon has become necessary. For that purpose, it is necessary to improve the restraining performance of the waist than in the past. The submarine phenomenon is a phenomenon in which the occupant enters the lower side of the lap belt toward the front side of the seat.

  An object of the present invention is to make it possible to suppress the submarine phenomenon while securing the restraint of the occupant's chest by the shoulder belt.

  A vehicle seat belt device according to an aspect of the present invention includes a shoulder belt for restraining a chest of an occupant seated on a vehicle seat, and a lap belt for restraining at least one of the waist or thigh of the occupant. And a buckle provided on the vehicle seat or vehicle body, and a state in which the shoulder belt is connected to the rear of the seat and the lap belt is connected to the front of the seat when the belt is mounted by the occupant. And a tongue plate.

  In this vehicle seat belt device, the shoulder belt can restrain the occupant's chest by engaging the tongue plate with the buckle when the occupant seated on the vehicle seat is worn, and the lap belt is attached to the occupant's waist. Alternatively, at least one of the thighs can be restrained.

  At this time, since the lap belt is connected to the front of the tongue plate, it is easy to restrain the upper surface of the occupant's thigh by the lap belt. As a result, the submarine phenomenon is suppressed.

  On the other hand, since the shoulder belt is connected to the rear side of the tongue plate, the shoulder belt passing path (belt path) is the same as that of a normal shoulder belt. Therefore, the restraint of the occupant's chest is not affected.

  According to the vehicle seat belt device of the present invention, the submarine phenomenon can be suppressed while securing the restraint of the occupant's chest by the shoulder belt.

In the vehicle seat belt device according to the first embodiment, the belt wearing state is a perspective view as seen from the buckle side. In the vehicle seat belt device according to the first embodiment, the belt non-mounted state is a perspective view seen from the side opposite to the buckle. In the vehicle seatbelt apparatus which concerns on 2nd Embodiment, it is the perspective view which looked at the belt mounting state from the buckle side. In the vehicle seat belt apparatus according to the second embodiment, the belt mounted state is a perspective view as seen from the seat lower side opposite to the buckle. In the vehicle seat belt device according to the second embodiment, the belt non-mounted state is a perspective view seen from the seat lower side opposite to the buckle. In the vehicle seatbelt apparatus which concerns on 3rd Embodiment, it is the perspective view which looked at the belt mounting state from the buckle side. In the vehicle seatbelt apparatus which concerns on 3rd Embodiment, it is the perspective view which looked at the belt non-wearing state from the opposite side to the buckle. In the vehicle seatbelt apparatus which concerns on 4th Embodiment, it is the perspective view which looked at the belt mounting state from the buckle side. In the vehicle seatbelt apparatus which concerns on 4th Embodiment, it is the perspective view which looked at the belt mounting state from the seat downward side on the opposite side to a buckle. In the vehicle seatbelt apparatus which concerns on 4th Embodiment, it is the perspective view which looked at the belt non-wearing state from the seat lower side opposite to the buckle.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the drawings, arrow FR indicates the front of the seat (front of the vehicle), arrow UP indicates the upper side of the seat (upward of the vehicle), and arrow RH indicates the right direction of the seat (right direction of the vehicle).

[First Embodiment]
1 and 2, the vehicle seat belt device 10 according to the present embodiment includes a shoulder belt 12, a lap belt 14, a buckle 16, and a tongue plate 18.

  In FIG. 2, the shoulder belt 12 is a non-stretchable belt-like member for restraining a chest 24 </ b> C of an occupant 24 seated on a vehicle seat 22. The shoulder belt 12 is coupled to, for example, a retractor (not shown) provided on the left side of the vehicle seat 22 and is urged in the winding direction by the retractor. This retractor may be provided in the vehicle seat 22 itself, or may be provided in a vehicle body part near the vehicle seat 22.

  The lap belt 14 is a non-stretchable belt-like member for restraining at least one of the waist 24W or the thigh 24L of the occupant 24. In FIG. 2, the end of the lap belt 14 is coupled to the seat frame (not shown) on the same side as the retractor, that is, the left side of the vehicle seat 22. The seat frame is provided below the seat cushion 26 and is covered by the left side cover 29 or exposed from the left side cover 29. The lap belt 14 is coupled to the seat frame through a belt through hole 29 </ b> A provided in the left side cover 29.

  In the present embodiment, the shoulder belt 12 and the lap belt 14 constitute a continuous webbing 15. As shown in FIG. 2, when the belt is not attached, the webbing 15 extends in the seat vertical direction along the left side portion of the vehicle seat 22 by winding the retractor. As shown in FIG. 1, when the belt is worn, a portion of the webbing 15 that restrains the chest 24 </ b> C of the occupant 24 becomes the shoulder belt 12, and at least one of the waist 24 </ b> W or the thigh 24 </ b> L of the webbing 15 is restrained. The portion becomes the lap belt 14.

  In FIG. 1, the buckle 16 is provided on the vehicle seat 22 or the vehicle body, and is configured to be able to engage the tongue plate 18. The buckle 16 is provided at a position on the opposite side of the seat frame in the seat width direction from the coupling side of the lap belt 14 with respect to the seat frame. In this embodiment, since the coupling side of the lap belt 14 is the left side, the buckle 16 is provided on the right seat frame (not shown) of the vehicle seat 22. Reference numeral 59 in the drawing denotes a right side cover of the seat cushion 26.

  In FIG. 2, the tongue plate 18 is a member that is engaged with the buckle 16 (FIG. 1) when the occupant 24 wears the belt, and the handle-like belt passing portion 32 and the insertion portion 34 to the buckle 16 are integrated. Have. The insertion part 34 protrudes from the center part in the longitudinal direction of the belt passing part 32 in a direction perpendicular to the longitudinal direction.

  The belt threading portion 32 is formed in a long rectangle whose longitudinal direction is the front-rear direction of the seat when the belt is attached (the insertion portion 34 of the tongue plate 48 is inserted into and engaged with the buckle 16) (FIG. 1). . Further, the belt passing portion 32 integrally includes an outer frame portion 32A and belt folded portions 32B and 32C. The belt folding portions 32B and 32C are linear rail portions that are passed between the upper side 32A1 and the lower side 32A2 of the outer frame portion 32A facing each other with an inclination of, for example, 45 ° with respect to the upper side 32A1 and the lower side 32A2.

  In FIG. 1, the belt folding portion 32B is formed on the seat rear side from the longitudinal center of the outer frame portion 32A, and extends toward the seat rear side as it goes upward. In the belt passing portion 32, a shoulder side passing portion 36 is formed in a portion surrounded by the belt folded portion 32B and a portion of the outer frame portion 32A that is on the rear side of the seat with respect to the belt folded portion 32B.

  Further, the belt folding portion 32C is formed on the front side of the seat with respect to the center in the longitudinal direction of the outer frame portion 32A, and extends toward the front side of the seat as it goes upward of the seat. In the belt passing portion 32, a wrap side passing portion 38 is formed in a portion surrounded by the belt folded portion 32C and a portion of the outer frame portion 32A that is on the front side of the seat with respect to the belt folded portion 32C.

  In the belt passing portion 32, a light hole 42 is formed in a central portion surrounded by the belt folding portions 32B and 32C and the upper side 32A1 and the lower side 32A2 of the outer frame portion 32A. The light hole 42 may be closed.

  As shown in FIG. 1, when the belt is mounted, the shoulder belt 12 is connected to the rear side of the tongue plate 18 and the lap belt 14 is connected to the front side of the tongue plate 18. Specifically, the shoulder belt 12 is connected to the belt folding portion 32B at the rear of the seat, and the lap belt 14 is configured to be connected to the belt folding portion 32C at the front of the seat. Here, “connected” means that the continuous webbing 15 is folded at the belt folding portions 32B and 32C, so that the shoulder belt 12 is caught by the belt folding portion 32B, and the lap belt 14 is caught by the belt folding portion 32C. Say.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the vehicle seat belt device 10 according to the present embodiment, the tongue plate 18 is engaged with the buckle 16 when the occupant 24 seated on the vehicle seat 22 is belted. As a result, the shoulder belt 12 can restrain the chest 24C of the occupant 24, and the lap belt 14 can restrain at least one of the waist 24W or the thigh 24L of the occupant 24.

  At this time, since the lap belt 14 is connected to the front of the tongue plate 18 (belt folding portion 32C), the upper surface of the thigh 24L of the occupant 24 is easily restrained by the lap belt 14. As a result, the submarine phenomenon at the time of a vehicle collision is suppressed. The submarine phenomenon means that the pelvis (not shown) of the occupant 24 rotates backward in the vehicle collision and the lap belt 14 is detached from the pelvis, so that the occupant 24 moves the lower side of the lap belt 14 to the front side of the seat. It is a phenomenon that sinks.

  On the other hand, since the shoulder belt 12 is connected to the rear side of the tongue plate 18 (belt folding portion 32B), the passage route (belt path) of the shoulder belt 12 is the same as that of a normal shoulder belt. Therefore, the restraint property of the chest 24C of the occupant 24 is not affected.

  Thus, according to the vehicle seat belt device 10, the submarine phenomenon can be suppressed while securing the restraint of the chest 24 </ b> C of the occupant 24 by the shoulder belt 12.

[Second Embodiment]
3 to 5, in the vehicle seat belt device 20 according to the present embodiment, the end 14A of the lap belt 14 passes under the seat cushion 26 and the seat frame 44 on the buckle 16 side (FIGS. 4 and 5). Is bound to. When the belt is worn, the lap belt 14 is folded in a U shape at the left side portion of the seat cushion 26, and therefore a belt guide (not shown) for guiding the lap belt 14 may be provided on the left side portion.

  As shown in FIGS. 3 and 4, in the vehicle seat belt device 20, the lap belt 14 is in a state of winding the thigh 24 </ b> L of the occupant 24 from the bottom to the top when the belt is worn. For this reason, a passenger | crew restraint property can be improved more.

  The lap belt 14 may pass under the seat cushion 26 after passing through the left side cover 29 of the seat cushion 26.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

[Third Embodiment]
6 and 7, in the vehicle seat belt device 30 according to the present embodiment, the shoulder belt 12 and the lap belt 14 are separated from each other and are connected via a tongue plate 48. The control for winding the shoulder belt 12 and the like and the control for winding the lap belt 14 are performed separately. Specifically, as shown in FIG. 7, the lap belt 14 is coupled to, for example, a retractor 46 provided on the rear left side of the vehicle seat 22 and is urged by the retractor 46 in the winding direction. The retractor 46 may be provided in the vehicle seat 22 itself, or may be provided in a vehicle body part near the vehicle seat 22.

  A belt guide 50 is provided at the rear portion of the left side portion of the seat cushion 26. The lap belt 14 is inserted through the belt guide 50. When the lap belt 14 is wound around the retractor 46 when the belt is not attached, the tongue plate 48 is caught by the belt guide 50, so that further winding of the lap belt 14 is suppressed. That is, the belt guide 50 also serves as a stopper for the tongue plate 48.

  The tongue plate 48 includes a shoulder side coupling portion 52 to which the shoulder belt 12 is coupled, a lap side coupling portion 54 to which the lap belt 14 is coupled, a grip portion 56, and an insertion portion 34 to the buckle 16. Yes. When the belt is attached (when the insertion portion 34 of the tongue plate 48 is inserted and engaged with the buckle 16), as shown in FIG. 6, the shoulder side coupling portion 52, the grip portion 56, and the lap side coupling portion 54 are They are arranged in series in the longitudinal direction of the seat. Specifically, the shoulder side coupling portion 52 is located on the seat rear side of the grip portion 56, and the lap side coupling portion 54 is located on the seat front side of the grip portion 56. As a result, when the belt is mounted, the shoulder belt 12 is connected to the rear of the tongue plate 48 and the lap belt 14 is connected to the front of the tongue plate 48.

  In FIG. 6, the shoulder belt 12 is coupled to the upper side of the shoulder side coupling portion 52, and the lap belt 14 is coupled to the lower side of the lap side coupling portion 54. Accordingly, as shown in FIG. 7, the insertion portion 34 of the tongue plate 48 is easily positioned below the grip portion 56 when the belt is not attached. In FIG. 6, the shoulder belt 12 may be coupled to the lower side of the shoulder side coupling portion 52. Further, the lap belt 14 may be coupled to the upper side of the lap side coupling portion 54.

  In the vehicle seat belt device 30, the shoulder belt 12 is pulled out from the retractor (not shown) and the lap belt 14 is pulled out from the retractor 46 (FIG. 7) when the occupant 24 seated on the vehicle seat 22 is belted. At this time, since the lap belt 14 is connected to the front of the tongue plate 48 (the lap side coupling portion 54), the lap belt 14 can easily restrain the upper surface of the thigh 24L of the occupant 24. As a result, the submarine phenomenon at the time of a vehicle collision is suppressed.

  On the other hand, since the shoulder belt 12 is connected to the rear side of the tongue plate 48 (shoulder side coupling portion 52), the passage route (belt path) of the shoulder belt 12 is the same as that of a normal shoulder belt. Therefore, the restraint property of the chest 24C of the occupant 24 is not affected.

  Thus, the vehicle seat belt device 30 can also suppress the submarine phenomenon while securing the restraint of the chest 24C of the occupant 24 by the shoulder belt 12.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

[Fourth Embodiment]
8 to 10, in the vehicle seat belt device 40 according to the present embodiment, the end of the lap belt 14 passes under the seat cushion 26 and is coupled to the retractor 58 on the buckle 16 side. The lap belt 14 enters under the seat cushion 26 from a belt through hole 29 </ b> B (FIG. 9) provided in the left side cover 29 of the seat cushion 26. The lap belt 14 extends under the seat cushion 26 from the left side of the seat to the right side of the seat and exits to the right side of the seat cushion 26 through a belt through hole 59A (FIG. 8) provided in the right side cover 59. Are combined.

  As shown in FIGS. 8 and 9, in the vehicle seat belt device 40, the lap belt 14 is in a state where the thigh 24 </ b> L of the occupant 24 is wound from the bottom to the top when the belt is worn. For this reason, a passenger | crew restraint property can be improved more.

  As shown in FIG. 10, when the belt is not attached, the tongue plate 48 is held on the left side of the seat by winding the shoulder belt 12 by a retractor (not shown) and winding the lap belt 14 by the retractor 58. .

  Since other parts are the same as those in the first embodiment, the second embodiment, or the third embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is. For example, you may combine the said embodiment suitably.

DESCRIPTION OF SYMBOLS 10 Vehicle seat belt apparatus 12 Shoulder belt 14 Lap belt 16 Buckle 18 Tang plate 20 Vehicle seat belt apparatus 22 Vehicle seat 24 Crew 24C Chest 24L Thigh 24W Lumbar 30 Vehicle seat belt apparatus 40 Vehicle seat belt apparatus 48 Tongue plate

Claims (1)

A shoulder belt for restraining the chest of an occupant seated in a vehicle seat;
A lap belt for restraining at least one of the waist or thigh of the occupant;
A buckle provided on the vehicle seat or the vehicle body;
A tongue plate that is engaged with the buckle when the belt is worn by the occupant, the shoulder belt is connected to the rear of the seat when the belt is attached, and the lap belt is connected to the front of the seat;
A vehicle seat belt apparatus comprising: