JPS6149131B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a seat belt device that restrains and protects an occupant in the event of a vehicle emergency such as a collision. The present invention relates to a seat belt device that can be worn.

[Conventional technology]

The seat belt device protects the occupant by restraining the occupant with the webbing in the event of a vehicle emergency, so the occupant is safely protected from colliding with the steering wheel or the like.

However, in general, the rate of attachment of restraining webbings is extremely low due to the fact that it is complicated to attach them.

Conventionally, seatbelt devices have been proposed that are capable of automatically attaching restraining webbing to the body of an occupant after the occupant is seated. This seatbelt device installs a guide rail on the vehicle body, and by running a slider to which the end of the webbing is attached along the guide rail, the webbing is moved toward and away from the seated occupant and is automatically released. It is possible.

[Problem that the invention seeks to solve]

In such a seatbelt device, the slider needs to be moved quickly and smoothly along the guide rail when the occupant gets on or off the vehicle, and it is also necessary to securely restrain the occupant in the event of a vehicle emergency. It is necessary that the slider and guide rail have sufficient strength to protect them from damage.

It is an object of the present invention to provide a seat belt device in which the strength of the slider and the guide rail is sufficiently ensured, and the slider and the guide rail do not interfere with each other when the slider runs. There is a particular thing.

[Means for Solving the Problems] The seat belt device of the present invention includes a guide rail that is laid in a vehicle body and has a head groove and a body groove that communicates with the head groove, and a seat belt that slides into the head groove of the guide rail. A head part that can be freely loaded; a body part connected to the head part and arranged with a predetermined gap in the body groove part of the guide rail; and one end of the webbing for occupant restraint located outside the guide rail. A slider comprising a webbing attachment part connected to each other, a body part shoe fixed to the body part and slidingly in contact with the inner surface of the body groove part of the guide rail, and a slider driving means for moving the slider along the guide rail. It is equipped with

[Effect]

According to the above configuration, when the webbing is attached or released, the slider moves while being guided by the head groove of the guide rail.
At that time, between the webbing attachment part and the head part,
Since there is a body shoe that slides in contact with the inner surface of the body groove of the guide rail, lateral vibration of the slider is restricted, and the head is always positioned in the correct fitted state with respect to the head groove.
Smooth running is guaranteed.

〔Example〕

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

In FIG. 1, a webbing 1 for restraining an occupant is obliquely wrapped around the body of an occupant 3 seated on an occupant seat 2, so that the occupant 3 is in a webbing-attached state. The inner end portion 4 of the webbing 1 is wound onto a winding device 6 attached to a floor member 5 of a vehicle. This winding device 6 is disposed approximately in the center of the vehicle, winds up the webbing 1 with a biasing force, and incorporates an inertia lock mechanism that abruptly stops unwinding the webbing 1 in the event of a vehicle emergency.

On the other hand, an outer end 7 of the webbing 1 is connected to a slider 9 via an anchor plate 8. The slider 9 is the front pillar 10 of the vehicle,
The guide rails 13 as shown in FIG. 2A (showing the center pillar part), FIG. 2B (showing the roof side part), and FIG. 3 are laid along the roof side 11 and the center pillar 12. It is inserted into the slider groove 14. This slider groove 14 extends along the longitudinal direction of the guide rail 13, and the slider 9 is movable along this slider groove 14.

As shown in FIGS. 4A and 4B, the slider 9 includes a head portion 15, a body portion 16 extending vertically from the center of the cross section of the head portion 15 so as to form a substantially T-shape; The leg portion 17 extends from the lower end of the body portion 16. The head portion 15 of the slider 9 is covered with a pair of first shoes 18 from both sides, and the first shoes 18 slide into a head groove 19 formed with the innermost part of the guide groove 14 of the guide rail 13. It is housed in a movable manner. The radius of curvature R1 of the inner sliding surface 18A of the first shoe 18 is set smaller than the radius of curvature R2 of the head groove 19 of the slider groove 14 in the curved portion of the guide rail 13 shown by 13A in FIG. Both ends of the inner sliding surface 18A of the first shoe 18 are in stable sliding contact with the head groove 19 in the entire area where the guide rail 13 is disposed.

A second shoe 21 is attached to a mounting seat 20 from the front and back on the lower end side of the body portion 16 of the slider 9, and is fixed by a lippet 22. The second shoe 21 is slidably guided on the inner surface of the opening of the body groove 23 which forms a substantially T-shape with the head groove 19 in the slider groove 14 .

These first shoes 18 and second shoes 21
is molded from a synthetic resin such as nylon, which has extremely low frictional resistance, good abrasion resistance, and excellent heat and cold resistance, and whose physical properties do not change. Therefore,
The slider 9, which is slidably guided in the slider groove 14 via the first shoe 18 and the second shoe 21, can run smoothly along the longitudinal direction of the guide rail 13.

An intermediate portion of the body portion 16 of the slider 9 between the head portion 15 and the crowned position of the second shoe 21 is inserted into a mounting hole portion 25 opened at the end side of the drive tape 24. This drive tape 24 is perpendicular to both sides of the middle part of the body groove part 23 of the slider groove 14 of the guide rail 13, and
The tape is movably inserted through a tape groove 26 extending in the longitudinal direction of the tape. That is, the driving tape 24 is moved along the tape groove 26 to the guide rail 13.
By moving the slider 9 in the longitudinal direction,
The guide rail 13 can move from a vertical backward end side 13C along the center pillar 12 to an inclined forward end side 13B along the front pillar 10. Slider 9
The leg portion 17 of the body portion 16 is
It is bent at an angle θ as shown in
An anchor plate 8 is connected to its lower end side by bolts 27 and nuts 28. Since the leg portion 17 is bent in this way with respect to the body portion 16, the anchor plate 8
Webbing tension F acting on the end of the slider 9 through the arm length L relative to the corner of the head 15
1 is smaller than the arm length L2 when the leg portion 17 is straight with respect to the body portion 16 as shown by the two-dot chain line in FIG. 4B, and therefore the angle of the head portion 15 is The rotational force exerted by the webbing tension F on the guide rail 13 is reduced, and the effect of forcing the slider groove 14 of the guide rail 13 open is reduced.

Further, although the bolts 27 and nuts 28 attach the anchor plate 8 to the slider 9 so as to be able to rotate relative to the slider 9, the protrusion 29 protruding from the edge of the slider 9 is provided on the anchor plate 8. engaged with the recessed portion 30;
The relative position of the anchor plate 8 with respect to the slider 9 under normal use conditions is fixed, and the webbing 1 is oriented in a direction that does not cause discomfort to the occupant 3. Note that when the webbing tension F is applied during a vehicle emergency, the protrusion 29 is destroyed and the anchor plate 8 rotates around the bolt 27 to the position shown by the two-dot chain line in FIG. 3's body is now securely restrained. In the figure, 31 indicates a cover.

The guide rail 13 is provided with continuous or
Mounting grooves 32 are formed intermittently, and these mounting grooves 32
A pair of lips 3 are provided to cover the opening side of the slider groove 14 of the guide rail 13 to improve the aesthetic appearance.
The base end side of 3 is housed and held. Since this pair of lips 33 always seals the slider groove 14 where the slider 9 is not parked, it not only improves the aesthetic appearance but also improves the appearance of the guide rail 18.
The sliding sound of the slider 9 inside is not transmitted directly into the passenger compartment.
It is possible to prevent rainwater from entering the guide rail 13 and to prevent rail components from deteriorating due to sunlight. The guide rail 13 and the lip 33 on the inside of the vehicle are covered by a side garnish 34, and the lip 33 on the vehicle body side is held between the center pillar inner or the roof side inner and the side surface of the guide rail 13. There is. The mounting groove 32 can accommodate not only the lip 33 but also a guide rail covering member such as a side garnish 34.

As shown in FIGS. 5 and 6, an anchor pin 35 that can be engaged with the tip end side of the head portion 15 of the slider 9 is fixed to the end of the retreating end side 13C of the guide rail 13 by a washer 36. ing. The anchor pin 35 is disposed so as to pass through the body groove 23 between the head groove 19 and the tape groove 26 of the guide rail 13, and improves the strength of the guide rail 13 against the action of the webbing tension F in the event of a vehicle emergency. At the same time, the tip end of the head portion 15 of the slider 9 can finally be locked and held.

The position of the bolt 27 for attaching the anchor plate 8 to the slider 9 is such that the line of action of the webbing tension F passing through the center axis of the bolt 27 passes through the center axis of the anchor pin 35. The head portion 1 of the slider 9 is arranged close to each other so that the distance E between the sliders 9 and 1 is small.
When the tip end side of the head part 5 is locked and held by the anchor pin 35, the effect W exerted on the head groove part 19 of the guide rail 13 by the other end side of the head part 15 can be reduced.

Also, the rearward end side 13C of this guide rail 13
A stop switch 38 is disposed at the end of the guide rail 13 via a mounting bracket 37, and an actuator 39 of the stop switch 38 is connected to the head groove 1 of the guide rail 13.
A damper rubber 40 is provided on the opening side of the head groove 19. That is, when the slider 9 reaches the retreating end side 13C of the guide rail 13, the tip of the first shoe 18, which is crowned by the head portion 15, touches the attituent 39.
is pushed in to stop the movement of the drive tape 24, and the movement inertia is absorbed by the damper rubber 40, so that the drive tape 24 is stopped in a quiet state near the anchor pin 35.

Furthermore, a tape guide 41 as shown in FIG. 7 is connected and arranged on the rearward end side 13C of the guide rail 13, and a tape track 42 is connected therein to the tape groove 26 of the guide rail 13. It is formed. The lower end of this tape guide 41 communicates with a sprocket housing 43 attached to the lower part of the center pillar 12.
A rectangular opening 45 of the drive tape 24 is adapted to engage with a sprocket wheel 44 which is pivotally supported within the sprocket housing 43.

A tape guide 46 is further connected to the sprocket housing 43, through which the drive tape 24 is pushed out after being engaged with the sprocket wheel 44. A sprocket wheel 44 in the sprocket housing 43 is rotated by an output shaft of a motor 48 passing through a cap 47, and the rotation of the sprocket wheel 44 causes the drive tape 24 to be moved along the guide rail. 13, move the slider 9 along the tape guides 41 and 46 to the rear end side 1 of the guide rail 13 as described above.
3C and the forward end side 13B.

The motor 48 is activated by detecting the passenger's getting on and off. For example, when the passenger closes the door after seating, the sprocket wheel 44 is rotated clockwise in FIG. Slider 9
is moved toward the rearward end side 13C of the guide rail 13, and at the rearward end, the aforementioned stop switch 3 is activated.
When the passenger opens the door, the sprocket wheel 44 is rotated in the opposite direction to move the slider 9 to the guide rail 1.
3 toward the forward end side 13B.

Next, the operation of the above embodiment will be explained. When a passenger enters the vehicle and closes the door after seating,
By driving the motor 48, the drive tape 24
In order to move the slider 9 and anchor plate 8 toward the rearward end side 13C of the guide rail 13, the occupant moves the webbing 1 as shown in FIG.
It is said that it is installed. Head portion 15 of slider 9
The first shoe 18 attached to the body part 16
With the guide rail 1 protruding from both sides,
Since the slider 9 is slidably supported in the head groove 19 of the guide rail 13, the slider 9 is stably supported in the cross-sectional width direction of the guide rail 13, and can be smoothly moved. Further, the radius of curvature R1 of the inner sliding surface 18A of the first shoe 18 is the curved portion 1 of the guide rail 13.
3A is set smaller than the radius of curvature R2 of the slider groove 14, the curved portion 13A is supported at two points at both ends in the running direction, and therefore the slider 9 is always stable and smooth in the running direction. It becomes possible to move to. Furthermore, since the slider 9 slides in the slider groove 14 of the guide rail 13 via the first shoe 18 and the second shoe 21 made of a material with extremely low frictional resistance,
Frictional resistance during movement is reduced, allowing smooth movement. At this time, even if a force is applied to the slider in a direction perpendicular to the running direction of the slider, the body of the slider is supported by the body shoe that contacts the inner surface of the body groove of the guide rail. Lateral vibration of the slider is regulated, and the body of the slider comes into contact with the guide rail, allowing smooth running at all times without impairing running.

When the occupant changes his or her driving posture with the webbing 1 attached in this manner, the inner end 4 of the webbing 1 can be moved by moving the occupant's upper body.
can be unwound from the winding device 6 against the winding force, and in this case, the anchor plate 8
Since the slider 9 is inserted into the vertically retracted end side 13C of the guide rail 13, movement in both front and rear directions of the chamber is prevented. In addition, in such an attached state, the attachment direction of the anchor plate 8 to the slider 9 is restricted to a predetermined direction by the uneven engagement between the protrusion 29 of the slider 9 and the recess 30 of the anchor plate 8. Even when the webbing 1 is attached, the occupant does not feel discomfort.

Next, when the vehicle is in an emergency situation such as a collision, the inertia lock mechanism of the winding device 6 suddenly stops unwinding the webbing 1, so that the occupant is securely restrained by the webbing 1. be able to. That is, the outer end 7 of the webbing 1 is engaged with the anchor plate 8, and the anchor plate 8 is housed in the vertically receding end side 13C of the guide rail 13, so that movement of the vehicle in the longitudinal direction is prevented. . Here, since a large webbing tension F acts on the anchor plate 8, the protrusion 29 of the slider 9 is destroyed and disengaged from the recess 30, and the anchor plate 8 rotates relative to the slider 9, allowing the passenger to The webbing 1 is moved in a direction in which the webbing 1 can be surely restrained.

When the vehicle finishes its normal running state and the occupant exits the vehicle, the motor 48 is driven by opening the door, and the slider 9 is activated by moving the drive tape 24.
is moved toward the forward end side 13B of the guide rail 13, and the webbing 1 is stopped in the state shown by the two-dot chain line in FIG. 1, so that the occupant can easily get off the vehicle.
In this case as well, the slider 9 is moved from the guide rail 1 to the rear end side 13C of the guide rail 13, as in the case where the rider gets on the vehicle and the slider 9 is moved to the rearward end side 13C of the guide rail 13.
It is possible to move smoothly along 3.

In addition, in the above embodiment, the drive tape 24
was directly inserted into the body part 16 between the head part 15 and the second shoe 21, but as shown in FIG.
1C, and the drive tape 24 is inserted into the stepped portion 21C between the head portion 15 and the sliding portion 21B of the second shoe 21, and the drive tape 24 is inserted into the second shoe made of nylon or the like. You may make it contact the step part 21C of 21A.

〔Effect of the invention〕

As described above, according to the present invention, the bed portion and the body portion of the slider move while slidingly contacting at least two places: the head groove portion of the guide rail and the body groove opening portion, so that rattling in the left and right direction can be prevented and the slider Since the body part does not interfere with the body groove of the guide rail, smooth running is possible at all times, and the running resistance due to lateral vibration when running the slider can be reduced.
The driving force of the slider can be reduced, and the drive section including the motor can be made smaller and more energy efficient.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the seat belt device according to the present invention, FIG. 2A is an enlarged sectional view of the center pillar portion, and FIG. 2B is an enlarged view of the roof side portion. 3 is an exploded perspective view of the main parts of Figure 2, Figure 4A is a front view of the slider, Figure 4B is a side view of Figure 4A, and Figure 5 is a guide. 6 is a sectional view taken along line - in FIG. 5; FIG. 7 is an exploded perspective view showing the combination of the drive tape and the sprocket foil; FIG. 8 is a side view showing another method of inserting the drive tape into the slider. 1...Webbing, 8...Anchor plate, 9...
Slider, 13...Guide rail, 13C...Retreat end side guide rail, 14...Slider groove, 15...Head part, 16...Body part, 17...Legs, 18...First
Shoe, 18A...Inner sliding surface, 21...Second shoe, 23...Body groove, 24...Drive tape, 26
...Tape groove, 29...Protrusion, 30...Recess, 32
...Mounting groove, 35...Anchor pin.

Claims (1)

[Claims] 1. A guide rail that is laid in a vehicle body and has a head groove and a body groove that communicates with the head groove, a head that is slidably inserted into the head groove of the guide rail, and the guide that is connected to the head. a slider consisting of a body part arranged with a predetermined gap in a body groove part of the rail; a webbing attachment part located outside the guide rail to which one end of the occupant restraint webbing is connected; and a lower end of the body. A seat belt device comprising: a body shoe that is fixed to a side of the guide rail and slides into contact with an inner surface of an opening of a body groove of the guide rail; and a slider drive means that moves the slider along the guide rail.