JPS6157221B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a passive seat belt device that is capable of automatically attaching restraint webbing to an occupant after the occupant is seated.

[Conventional technology]

Although passenger restraint webbing is extremely safe as it restrains and protects occupants in the event of a vehicle emergency, its installation rate is extremely low due to the complexity of wearing it and the feeling of pressure while wearing it. There is.

For this reason, various passive seat belt devices have been proposed in the past that are capable of automatically attaching webbing to an occupant after the occupant is seated.

In particular, a guide rail is provided on the roof side member of the vehicle in the longitudinal direction of the vehicle, and the outer end of the webbing is attached to a bogie that moves while being guided by the guide rail, and the driving force of the motor is connected to the bogie. The passive seatbelt device, which moves the dolly in the longitudinal direction of the vehicle to move the webbing toward and away from the passenger seat, automatically attaches and releases the webbing to the occupant seated on the seat, has been highly praised for its reliability. ing.

[Problem that the invention seeks to solve]

However, in this passive seat belt device, it is necessary to provide a truck, a guide rail to guide the truck, a transmission member to transmit the driving force of the motor to the truck, etc. on the roof side of the vehicle.
These protruded into the vehicle interior and narrowed the interior space. Furthermore, when the vehicle interior side of the truck is covered with a covering material, the truck itself becomes heavy, and there is a problem in that the seat belt cannot be smoothly attached or removed.

The present invention has been developed in consideration of the above-mentioned facts, and when the webbing automatic device is activated to release the webbing, the bogie or anchor part that moves the webbing in the longitudinal direction of the vehicle does not interfere with the passenger's head, and the bogie always runs smoothly. The purpose is to provide a passive seat belt device that guarantees the following.

[Means for solving problems]

The passive seatbelt device of the present invention has a seatbelt attachment part and a sliding part, and the seatbelt attachment part has a slider to which one end of the seatbelt for selectively restraining or unrestraining an occupant is fixed. a flexible driving force transmitting member that engages with the slider to transmit driving force; an interior material disposed on the side of the ceiling of the vehicle interior; and a sliding portion of the slider that extends in the longitudinal direction of the vehicle. The slider has a sliding groove and an interior material abutting portion to be slidably housed, and also includes a guide means interposed between the roof side member and the interior material, so that the guide means is connected to the roof side member. A slit is formed between the lower end of the interior material and the roof side member, and the seat belt fixed to the slider is passed through the slit in the longitudinal direction of the vehicle. It is movably arranged.

[Effect]

According to the above configuration, the guide means is covered with the interior material on the vehicle interior side, and the interior material is fixed to the interior material abutting part of the guide means, so that there is a gap between the interior material and the roof side member. The width of the running space (slit) of the slider formed in the slider is kept constant. Therefore, the sliding part of the slider is completely covered and protected by the interior material, so there is no interference with the passenger's head when the slider is operated, and the slider can always operate smoothly. .

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment of the present invention shown in FIGS. 1 and 2, the occupant restraint webbing 10 has an inner end 1
A winding device 1 that winds the webbing by applying force 2
4 to the vehicle floor 15. This winding device 14 is attached to a substantially central portion of the vehicle in the left-right direction. This inner end 12 is connected to the winding device 1.
It is also possible to lock directly to the floor part 15 without intervening 4.

On the other hand, the outer end 16 of the webbing 10 is attached to a truck 18 serving as a slider and is adapted to be moved in the longitudinal direction of the vehicle along the roof side member 20 of the vehicle. This movement brings the webbing 10 into contact with and away from the passenger seat 22, so that the passenger seated on the seat 22 can automatically release the webbing 10.

As shown in FIGS. 3 and 4, the bogie 18 is provided with a movable plate 24 as a sliding part, and a seatbelt attaching part which is an anchor part of the movable plate 24 that protrudes toward the vehicle floor. A long hole 28 is formed in the extension part 26 and locks the outer end part 16 of the webbing 10. Further, four shafts 30 are fixed to the moving plate 24 in parallel with each other, and these shafts 30
As shown in FIG. 4, a drum-shaped wheel 32 with a reduced diameter at the center is pivotally supported on each of the wheels. As shown in FIG. 4, this wheel 32 is held by a guide rail 34 having a U-shaped cross section, and is rotatably movable in the longitudinal direction of the guide rail 34, that is, in the longitudinal direction of the vehicle.

More specifically, since the guide rail 34 has a U-shaped cross section as described above, the slider sliding groove 35 is formed in the U-shape, and the slider sliding groove 35, especially the relative orientation of the groove 35, is formed in the U-shape. The wheels 32 are rotatably guided by the edges. In this embodiment, a truck with wheels is used as the slider, but the present invention is not limited to this, and it goes without saying that, for example, a sliding member without wheels may be used as the slider.

The guide rail 34 has a U-shaped cross section and its center portion is fixed to the inside of the roof side member 20 by a plurality of mounting screws 36, and the guide rail 34 is arranged so that the opening faces toward the inside of the car.

Further, a flange piece 38 is extended to the upper part of this guide rail 34, and a flange piece 42 and mounting screws 44 are extended to the upper part of the slide rail 40.
, and the slide rail 40 is arranged parallel to the guide rail 34.

The slide rail 40 is provided with a flange piece 72 that is substantially parallel to the flange piece 42 and serves as a roof head lining support portion. The guide rail 34 and slide rail 40 constitute a guide means. A rectangular groove 46 is continuously formed between the flange pieces 42 and 72 of the slide rail 40 along the longitudinal direction, and from the intermediate depth portion of the rectangular groove 46, the groove width of the rectangular groove 46 is A slide groove 48 is bored as a groove for a driving force transmitting member, and a thick tape 50 as a flexible driving force transmitting member shown in FIG. 5 is inserted into this slide groove 48. It is accommodated so that it can slide in the longitudinal direction of the slide rail 40.

Note that in this embodiment, the guide rail 34 and the slide rail 40 are separate bodies, but the present invention does not need to be limited to this; for example, the guide rail 34
A guide means in which the slide rail 40 and the slide rail 40 are integrated may be adopted. Further, although the flange piece 72 is shown extending from the slide rail 40, the present invention is not limited to this, and for example, one extending from the guide rail 34 may be adopted.

As shown in FIG. 5, this thick tape 50 has a rectangular cross section perpendicular to the longitudinal direction, and has a large number of openings 51 formed at equal intervals along the longitudinal direction. Furthermore, the rectangular shape of this thick tape 50 has dimensions that correspond to the slide groove 48 of the slide rail 40.
By inserting it inside with a slight gap, not only tensile force but also compressive force can be transmitted. Moreover, it is preferable to use synthetic resin as the material of this tape 50,
Appropriate flexibility allows for bending with a small curvature.

A sliding block 54 is fixed to one end of this thick tape 50 by four rivets 52. A protrusion 56 protruding from the sliding block 54 in the direction of the moving plate 24 has a projection 56 that extends from the moving plate 24 to the sliding block 5.
A recess 59 is formed to accommodate the protrusion 58 projecting in four directions, and when the protrusion 58 is inserted into the recess 59 and the sliding block 54 moves in the longitudinal direction of the vehicle together with the thick tape 50, the bogie 18 can be moved in the longitudinal direction of the vehicle at the same time.

An elongated hole 60 is bored at the end of the movable plate 24 on the rear side of the vehicle, and one end of a narrow webbing 62 is locked therein. This narrow webbing 62
The other end is wound onto a winding shaft 68 of a winding device 66 which is fixed to the roof side member 20 by a mounting bolt 64 at the rear of the guide rail 34 of the vehicle.

This winding device 66 has the same structure as the winding device 14 that winds up the inner end portion 12, and is a well-known emergency robot that suddenly stops unwinding the webbing 62 only in case of a vehicle emergency. This is a king retractor, and the webbing 62 is normally wound up by the biasing force of a mainspring spring 70. Therefore, the movable plate 24, which is connected to the take-up device 66 via the webbing 62, is moved toward the rear of the vehicle by the biasing force of the mainspring spring 70, and in the event of a vehicle emergency, the webbing unwinding of the take-up device 66 is stopped. This makes it possible to prevent the outer end 16 of the occupant restraining webbing 10 from being pulled out toward the front of the vehicle.

As shown in FIG. 4, from the slide rail 40, a flange piece 72 as an abutting part of the roof lining 74 extends in the opposite direction to the flange piece 42, that is, toward the floor of the vehicle. A roof lining 74, which is a ceiling lining inside the vehicle interior, is secured to the roof lining 74 by mounting screws 75. Therefore, the guide rail 3 is provided between the roof lining 74 and the roof side member 20.
4. It has a structure in which the slide rail 40, the truck 18, etc. are held in place, and a running space (slit) for the slider is formed between the lower end 74A of the roof lining 74 and the roof side member 20, and the slider is guided into the vehicle interior. The rail 34, slide rail 40, and truck 18 are not exposed. In this embodiment, the roof lining 34 is brought into contact with the flange piece 72 as an interior material, but the present invention does not need to be limited to this. An interior material that can be covered may also be used. Especially trolley 18
The tape 50, which is the driving member of the slide rail 40, can transmit not only tensile force but also compressive force.
It is sufficient to simply form the grooves 46 and 48 for accommodating the tape 50, and the outer diameter is small, and the distance between the roof side member 20 and the roof lining 74 can be significantly reduced. On the other hand, conventional seatbelt devices that drive the webbing with wires that transmit only tensile force require two wires between the roof side member and the roof lining to drive the bogie toward the front and rear of the vehicle, respectively. In addition, it is necessary to accommodate pulleys to guide the ends of these wires, guide pulleys to bend the movement trajectory of the wires, and tension adjustment devices to maintain the tension of the wires within a predetermined range, so roof lining is necessary. bulged out into the cabin, reducing the passenger living space inside the cabin.

Note that the guide rail 34 and slide rail 40 are preferably made of aluminum material.

Further, as shown in FIGS. 6 and 7, a front L-shaped stopper 76 is fixed to the front end of the guide rail 34 with a mounting screw 77, and one side of the stopper 76 projects into the guide rail 34. Therefore, this front L-shaped stopper 76 is adapted to restrict the amount of movement when the moving plate 24 is moved the maximum amount forward of the vehicle, as shown by the two-dot chain line in FIG.

Further, as shown in FIGS. 3 and 8, a rear L-shaped stopper 78 is fixed to the slide rail 40 near the rear end of the vehicle of the guide rail 34 with a mounting screw 77, and one side of the rear L-shaped stopper 78 is fixed to the slide rail 40 near the rear end of the vehicle. It projects into the groove 46. Therefore, this rear L-shaped stopper 78 is designed to restrict the amount of rearward movement of the thick tape 50 within the slide groove 48, as shown in FIG.

As shown in FIGS. 9 and 10, the slide rail 40 is fixed to the interior side of a front pillar 79 of the vehicle with a mounting screw 44, and descends along this front pillar 79. The lower end of this slide rail 40 is attached to a sprocket housing 82 as shown in FIG.

This sprocket housing 82 is formed into a thick disk shape as shown in FIGS. 12 to 16, and has a sprocket foil 84 inside it.
The housing recess 86 is formed in a substantially circular shape, and is closed when the sprocket housing 82 and the lid member 88 are fixed.

Here, the sprocket housing 82 and the lid member 88 have a diameter smaller than the outer diameter of the housing recess 86 near the periphery of the housing recess 86;
An arcuate groove 90 deeper than 6 is formed to accommodate the engagement portion of the thick tape 50 to the sprocket foil 84. Although this arcuate groove is annular, it does not necessarily have to be connected in an annular manner. Further, a pair of tape insertion grooves 92 and 94 extending substantially tangentially are formed in this arcuate groove 90 at the same depth as the arcuate groove 90, and these are oriented in opposite directions and mesh with the sprocket foil 84. It is used for inserting and removing the thick tape 50. Therefore, the thick tape 50 is inserted into the tape insertion groove 92.
It enters into the arcuate groove 90 through the tape, and after engaging with the sprocket foil 84, exits to the outside of the sprocket housing 82 through the tape insertion groove 94.

Here, the sprocket housing 82 and the lid member 88 have a preliminary insertion groove 9 that contacts the arcuate groove 90 of the accommodation recess 86 similarly to the tape insertion grooves 92 and 94.
6, 98, 100, and 102 are formed so that the intersection angle (angle θ in FIG. 16) of the thick tape 50 bent by the sprocket housing 82 can be changed.

Furthermore, this sprocket housing 82 has three mounting flanges 104 protruding from the outer periphery at equal intervals, and by applying mounting screws 106, the sprocket housing 82 can be attached to the front of the vehicle via a bracket 107 as shown in FIG. A sprocket housing 82 is fixed to the pillar 79.

Therefore, this sprocket housing 82 can be assembled after wrapping the thick tape 50 around the sprocket foil 84, thereby making it possible to significantly improve work efficiency. The relative position of the thick tape 50 and the sprocket foil 84 at the time of assembly is such that the thick tape 50 is attached to the sprocket foil 84 with the movable plate 26 in contact with the front L-shaped stopper 76 as shown in FIG. All you have to do is wrap it around the body, and positioning is extremely easy.

Additionally, six thick support protrusions 108, which have the same shape as the mounting flange portion 104, are fixed to the outer periphery of the sprocket housing 82.
A mounting piece 110 extending from the end of the slide rail 40 is screwed onto the support protrusion 108 . Therefore, this support protrusion 108 corresponds to any of the support protrusions 1 corresponding to the preliminary insertion grooves 96 to 102 when changing the insertion position and ejection position of the thick tape 50 into the sprocket housing 82.
08 is now selected.

A drive shaft 114 of a reversible motor 112, which is inserted into the sprocket housing 82 through a center hole 111 of the cover member 88, is fixed to the front sprocket wheel 84. This motor 112 is inserted into the front pillar 79 through a notch 116 formed in the front pillar 79, and is fixed inside the front pillar 79 with a bracket 118 and mounting screws 120. This motor is connected to a vehicle power supply (not shown) and driven, but this drive is used to open and close the entrance/exit door (not shown) and to operate a seat switch embedded in the passenger seat that detects when the passenger is seated. It is designed to be started by actuation.

The direction of rotation of the motor is such that when the occupant opens the door when getting on or off the vehicle, the sprocket wheel 84 is rotated counterclockwise in FIGS. 1 and 13, and clockwise when the door is closed. The number of rotations is determined before the truck 18 comes into contact with the front L-shaped stopper 76 at the front end of the guide rail 34, and the truck 18 moves toward the rear of the vehicle and the thick tape 50 is rotated to the rear L-shaped stopper 76 as shown in FIG. It is designed to stop before contacting the mold stopper 78.

A second slide rail 122 is fixed to the sprocket housing 82 with mounting screws 106 similarly to the slide rail 40, and this second slide rail 122 is attached to the front pillar 79.
The lower end of the sprocket wheel 8 is inserted into the rocker panel 124 of the vehicle through an opening 125 as shown in FIG.
4 is rotated counterclockwise, the thick tape 50 pushed out from the second slide rail 122 is pushed out into the rocker panel 124.

Note that the thick tape 50 has a length extending at least from the sprocket housing 82 to the movable carriage 18, so that the sprocket wheel 84 can be driven by the carriage 1.
8 is always transmitted.

Note that 15A in FIG. 9 is a front pillar garnish, 15B in FIG. 10 is a cowl side trim, and 15C and 15D in FIG. 17 are a carpet and a scuff plate, respectively.

To explain the operation of the first embodiment of the present invention configured as described above, FIG. The occupant has been moved to the rear end by the maximum amount and is now wearing the webbing. Since the webbing can be unwound from the take-up device 14 in this webbing-attached state, the driving posture can be changed.

In addition, when the vehicle is in an emergency situation such as a collision, the inertia lock mechanism built in the winding devices 14 and 66 locks the webbing 10 and the narrow webbing 62.
Since the unwinding of the webbing is abruptly stopped, the trolley 18 reliably prevents the outer end 16 of the webbing 10 from being pulled out toward the front of the vehicle, and the occupant is restrained and safety is guaranteed.

Next, when the passenger exits the vehicle, when the door is opened, the motor 112 rotates the sprocket wheel 84 counterclockwise in FIG. A
moved in the direction. As a result, the truck 18, which is locked via the sliding block 54, is moved forward of the vehicle along the guide rail 34, so that the outer end 16 of the webbing 10 is moved as shown by the two-dot chain line in FIG. is moved significantly toward the front of the vehicle. Therefore, the webbing 10 is used as the passenger seat 2.
A space for passengers to get off the vehicle is formed between the two and 2, so that the passengers can easily get off the vehicle.

Next, when the occupant re-enters the vehicle, the driver closes the door (not shown) after seating, and the motor 112 is rotated in the opposite direction to apply compressive force to the thick tape 50, causing it to move in the direction opposite to the direction of arrow A. Therefore, since the sliding block 54 moves in the direction of the winding device 66, the carriage 18 is also moved in the direction of the winding device 66, that is, toward the rear of the vehicle with the biasing force of the mainspring spring 70, as shown in FIG. The webbing can be automatically attached to the occupant.

Further, in this embodiment, the lower end 74A of the roof lining 74 is disposed between the lower end 20A of the roof side member 20 and the extension 26 of the movable plate 24.
Since only a narrow slit is formed through which the moving plate 24 can be moved in the longitudinal direction of the vehicle, the slit and the protruding moving plate 24 are visible to the passenger.
Since the trolley 18 and the tape 50 that move in the longitudinal direction of the vehicle are not visible, they do not move near the occupant's head and the occupant does not feel frightened. Furthermore, this slit continues along the lateral end of the vehicle interior, that is, along the window glass, in the longitudinal direction of the vehicle, and extends through the extension portion 2 of the movable plate 24.
6 also moves in the longitudinal direction of the vehicle along the window glass, so it passes through the farthest position from the occupant. In addition, since the slit faces toward the floor rather than toward the occupant's face, there is no interference with the occupant's head when the trolley 18 moves.

Next, FIG. 18 shows another embodiment of the means for locking the thick tape 50 and the movable plate 24. In FIG.

Here is the protrusion 56 of the sliding block 54.
is in contact with a protrusion 58A protruding from the moving plate 24 in the direction of the thick tape 50 from the rear side of the vehicle, that is, from the winding device 66 side, allowing the two to be separated. Therefore, when the sliding block 54 is moved to the front of the vehicle by the thick tape 50, the moving plate 24 is moved to the front of the vehicle via the protrusion 58A, but the moving plate 24 cannot be moved to the front of the vehicle by itself. I'm starting to be able to do it.

Accordingly, in this embodiment, even if the occupant changes his or her driving posture while wearing the webbing 10, the movable plate 24 moves toward the front of the vehicle while unwinding the narrow webbing 62, increasing the degree of freedom for the occupant. Furthermore, if the occupant grasps the webbing 10 while moving the outer end 16 by driving the thick tape 50, or if the occupant intentionally moves his/her body, the carriage 18 will be difficult to move due to the sliding block 56. This can prevent damage to each part. The other configurations are the same as those in the above embodiment,
It is now possible to obtain similar effects.

Next, in FIGS. 19 to 22, a wire 150 is used as a transmission member for transmitting the driving force of the motor 122 to the cart 18, unlike the above embodiments.

This wire 150 is capable of transmitting compressive force as well as tensile force applied in the longitudinal direction, and one end is shown in FIG.
Sliding block 5 as shown in Figure 21
4A, and the intermediate portion is arranged in a sliding groove 48A having a substantially circular cross section, which is bored in the slide rail 40, so that it slides in this sliding groove 48A.

The other end of the wire 150 is wound around a wire winding device 152 attached to the roof side member 20 in front of the guide rail 34 of the vehicle. As shown in detail in FIG. 22, this wire winding device 152 has a saucer-shaped base 154 that is fastened to the roof side member 20 with mounting bolts 156, and a shaft 158 is fixed to the center of the base 154. ing.

A worm wheel 160 is pivotally supported on this shaft 158, and a worm 162 is pivotally supported on the base 154.
It's meshing with. This worm 162 is driven by a motor 122 attached to a bracket roof side member 20 (not shown).

A pressure receiving disc 164 is rotatably supported on the shaft 158, and a compression coil spring 1 is connected between the ring 166 and the ring 166, which is secured to the shaft 158 by a C-shaped ring 166.
70 are interposed. Therefore, this pressure receiving disk 16
4 is the worm wheel 1 due to the biasing force of the spring 170.
60, and the worm foil 1 is pressed by the frictional force.
It is designed to rotate together with 60.

A thin rotating plate 174 having an annular groove 172 having a U-shaped cross section is fixed to the pressure receiving disk 164. One side of a tapered winding drum 176 is fixed to the bottom of the annular groove 172, and a wire accommodating portion 1 having a tapered cross section is connected to the peripheral edge of the rotary plate 174.
78 is formed.

Here, a U-shaped wire guide wall 180 is formed on the base 154, and the inside thereof is used as a wire guide groove 182, which is arranged in the tangential direction of the maximum diameter portion 178A of the annular wire accommodating portion 178. 178 and the sliding groove 48A of the slide rail 40 are connected. Also wire 150
The end portion of the winding drum 176 is fixed to the smallest diameter portion 178B.

Therefore, the winding drum 178 gradually winds up the wire 150 from the smallest diameter part by the rotation of the motor 112, moving the sliding block 54 toward the front of the vehicle, and gradually unwinds the wire 150 from the largest diameter part by the reverse rotation of the motor 122. The sliding block 54 is moved toward the rear of the vehicle by a compression force of 150 mm.

The configuration other than the above is the same as that of the second embodiment, and the sliding block 54 is in contact with the projection 58A of the movable plate 24 from the rear side of the vehicle.

Also in this embodiment configured in this way, the slide rail 40, guide rail 34, etc. are arranged between the roof side member 20 and the roof lining 74, and it is possible to obtain the same effects as in each of the above embodiments. It is.

〔Effect of the invention〕

As described above, according to the present invention, the interior material disposed toward the inside of the vehicle interior is fixed to the interior material abutting portion of the guide means, and the interior material is arranged substantially downwardly between the lower end of the interior material and the half side member. Since the slit is formed to open at the same time, the sliding portions of the guide means and the slider are not exposed to the passenger compartment side. Further, since the roof lining is supported by the guide means, a running space for the slider is secured, and stable operation of the seat belt device is always guaranteed.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the passive seat belt device according to the present invention (however, the interior lining, such as the garnish and lining, are omitted), and FIG. 2 is a side view of the vehicle shown in FIG. 1. Figure 3 is a partially enlarged view of Figure 1, Figure 4 is a sectional view taken along the line of Figure 3, Figure 5 is a partial perspective view showing the thick tape, Figure 6 is a front stopper. Fig. 7 is a partial view of Fig. 1 showing the
The figure is Fig. 3 - Line cross-sectional view, Fig. 9 is Fig. 1 -
Line sectional view, Figure 10 is a line sectional view of Figure 1,
Figure 11 is a partial perspective view of the arrangement from the front pillar to the rocker panel as seen from the inside of the vehicle;
2 is a sectional view taken along line XII-XII in FIG. 11, FIG. 13 is a front view showing the sprocket housing, FIG. 14 is an exploded perspective view of FIG. 13, and FIG. 15 is an assembled perspective view of FIG. 14. Fig. 16 is a back view of the sprocket housing, Fig. 17 is a sectional view taken along the line of Fig. 1, Fig. 18 is a side view corresponding to Fig. 3 showing another embodiment of the locking means, and Fig. 19 is a A side view corresponding to FIG. 1 showing another embodiment of the transmission member, and FIG.
A partially enlarged view of Figure 9, Figure 21 is Figure 19 XI-
22 is a cross-sectional view taken along the line XII--XII in FIG. 19. 10...Webbing, 116...Outer side end, 1
8...Slider, 20...Roof side member,
24...Moving plate (sliding part), 32...Wheel, 3
4...Guide rail, 35...Slider sliding groove,
40... Slide rail, 48... Groove for driving force transmission member, 50... Thick tape (driving force transmission member), 51
...Opening, 72...Flange piece (roof lining contact part), 74...Roof lining (interior material), 82
... Sprocket housing, 84... Sprocket foil, 88... Lid member, 92, 94... Tape insertion groove, 112... Reversible motor.

Claims (1)

[Claims] 1. The seatbelt attachment part has a seatbelt attachment part and a sliding part, and the seatbelt attachment part has a slider to which one end of the seatbelt for selectively restraining or unrestrainting the occupant is fixed, and a slider that engages with the slider and is driven. A flexible driving force transmitting member that transmits force, an interior material disposed on the side of the ceiling, and a slider sliding groove that accommodates the sliding portion of the slider so as to be slidable in the longitudinal direction of the vehicle. The guide means has an interior material contacting part and is interposed between the roof side member and the interior material, so that the guide means holds the roof side member and the interior material separated for a predetermined period, An opening slit is formed between the lower end of the interior material and the roof side member, and a seat belt fixed to the slider is disposed within the slit so as to be movable in the longitudinal direction of the vehicle. Passive seat belt device.