JPS6146355B2 - - 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.

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

However, in general, the rate of attachment of restraining webbings is extremely low due to factors such as the complexity of the device.

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. Further, the slider and the guide rail are arranged inside the vehicle interior, and it is desirable that their volume be made as small as possible. Furthermore, when wearing a seatbelt, it is necessary that the seatbelt does not make the user feel uncomfortable.

This invention was made in view of the above-mentioned fact, and an object of the present invention is to provide a seatbelt device that can always keep the seatbelt attached to the occupant at a constant position.

[Means for solving problems]

In order to achieve the above object, the seat belt device of the present invention includes a slider having a sliding part and a leg part, a guide rail having a slider groove for slidably housing the sliding part of the slider, and a guide rail having a slider groove that slidably accommodates the sliding part of the slider. an anchor plate that is rotatably supported on the leg of the slider and to which the seat belt is fixed; and the anchor plate is fixed by being fixed to the leg of the slider when the seat belt is normally worn; The slider includes a locking mechanism that releases the slider from the leg portion and allows the slider to rotate, and a drive unit that moves the slider along the guide rail.

[Effect]

According to the above configuration, when the seat belt is fastened or released, the drive section is activated and the slider moves along the guide rail. At this time, since the anchor plate is fixed to the slider at a predetermined angle by the locking mechanism, the seat belt is regulated in a predetermined direction via the anchor plate and is locked to the slider. Therefore, the anchor plate does not rotate each time the seat belt is worn, and the position of the seat belt relative to the occupant does not shift, so that the seat belt is always worn on a predetermined body part. Further, in a vehicle emergency, when a large tension of the seat belt acts on the slider, the anchor plate fixed to the slider is released and becomes rotatable. As a result, the anchor plate is oriented in the tension direction of the seat belt, thereby preventing the seat belt from shifting in its attachment position relative to the occupant, thereby reliably restraining the occupant.

〔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 the 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 has a head portion 15 as a sliding portion and is vertically disposed in a substantially T-shape from the center of the cross section of the head portion 15. It is formed from a body part 16 and leg parts 17 extending from the lower end of the body part 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 the head groove 19 forming the innermost part of the slider 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 of the curved portion of the guide rail 13 shown by 13A in FIG. Guide rail 13
Both ends of the inner sliding surface 18A of the first shoe 18 in the running direction are in stable sliding contact with the head groove 19 in the entire area where the first shoe 18 is disposed.

A mounting seat 20 is provided on the lower end side of the body portion 16 of the slider 9, and a second shoe 21 is attached to the mounting seat 20 from the front and back, and is fixed by a rivet 22. This second show 2
1 is the head groove portion 1 in the slider groove 14.
9 and is slidably guided to the opening side of a body groove 23 having a substantially T-shape.

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 driving tape 24 is attached to a body groove portion 23 in the slider groove 14 of the guide rail 13.
A tape groove 26 extends in the longitudinal direction of the guide rail 13 and is perpendicular to both sides of the intermediate portion of the guide rail 13.
It is inserted so that it can move inside. That is, as the drive tape 24 moves in the longitudinal direction of the guide rail 13 along the tape groove 26, the slider 9 moves from the vertical rearward end side 13C along the center pillar 12 of the guide rail 13 to the front pillar 10. It is now possible to move to the forward end side 13B which is inclined along the forward direction. The leg portion 17 of the slider 9 is bent at an angle θ with respect to the body portion 16, as shown in FIG.
Anchor plates 8 are connected by.
Since the leg portion 17 is bent with respect to the body portion 16 in this manner, the webbing tension F acting on the end of the slider 9 via the anchor plate 8 and the arm force against the corner of the head portion 15 are The length L1 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. The rotational force exerted by the webbing tension F on the corner of the guide rail 13 is reduced, and the effect of trying to pry open the slider groove 14 of the guide rail 13 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.

Note that the arrangement of the protrusion 29 and the recess 30 is as follows:
The present invention is not limited to the above-mentioned embodiment, and the anchor plate 8 may be provided with a protrusion 29 and the leg portion 17 may be provided with a recess 30. Here, the locking mechanism is composed of a protrusion and a recess. In the figure, 31 is a cover.

Attachment grooves 32 are formed continuously or intermittently in the longitudinal direction on both the outer side portions of the guide rail 13 on the vehicle interior side and the vehicle body side. A pair of lips 33 to cover the opening side and improve the aesthetic appearance.
It is designed to store and hold the proximal end of the Since this pair of lips 33 always seals the slider groove 14 where the slider 9 is not parked, it not only improves the appearance but also directly transmits the sliding sound of the slider 9 inside the guide rail 18 into the vehicle interior. First, it is possible to prevent rainwater from entering the guide rail 13, and also to prevent the 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. In addition, with respect to the installation position of the anchor pin 35, the installation 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 central axis of the bolt 27 is the central axis of the anchor pin 35. When the distal end side of the head section 15 of the slider 9 is locked and held by the anchor pin 35, the other end side of the head section 15 acts on the head groove section 19 of the guide rail 13. This makes it possible to reduce W.

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 covered with the head portion 15, touches the actuator 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 that passes 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 whether the occupant is getting on or off the vehicle. For example, when the occupant closes the door after seating, the sprocket wheel 44 is rotated clockwise in FIG. , the slider 9 is moved toward the rearward end side 13C of the guide rail 13, and is stopped at the rearward end by the operation of the stop switch 38, and when the occupant opens the door, the slider 9 is moved in the opposite direction. The slider 9 is moved toward the forward end side 13B of the guide rail 13 by rotating the sprocket wheel 44.

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. Here, since the sliding portion of the slider 9 is accommodated in the slider groove 14 of the guide rail, the slider 9 can always move smoothly in a stable state.

The slider 9 and anchor plate 8 are
Since it is fixed and integrated by the locking of the protrusion 29 and the recess 30 as a locking mechanism, the dynamic form of the seatbelt is stabilized, and the position of the seatbelt attached to the occupant is always constant. .

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 vertical rearward end side 13C of the guide rail 13, movement in the longitudinal direction of the vehicle is prevented.

Next, when the vehicle is in an emergency situation such as a collision, the inertia lock mechanism in the winding device 6 suddenly stops unwinding the webbing 1, so that the occupant can be securely restrained by the webbing 1. can become. 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. It may be made to contact the stepped portion 21C of 21A.

〔Effect of the invention〕

As described above, according to the present invention, the anchor plate is fixed and integrated with the slider in usage modes other than vehicle emergencies, so that the anchor plate is prevented from inadvertently rotating due to movement of the slider. This eliminates discomfort by ensuring that the seat belt is always attached to the optimal body part.In addition, in the event of a vehicle emergency, the slider and anchor plate are unlocked, allowing the anchor plate to follow the occupant's movements. It rotates to securely restrain the occupants.

[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, 14...
...Slider groove, 15... Head portion, 17... Leg portion, 24... Drive tape, 26... Tape groove, 2
9... Protrusion, 30... Recess.

Claims (1)

[Scope of Claims] 1. A slider having a sliding part and a leg part, a guide rail having a slider groove that slidably accommodates the sliding part of the slider, and a rotatably supported pivot on the leg part of the slider. and an anchor plate to which the seat belt is locked, and the anchor plate is locked and fixed to the leg of the slider when the seat belt is normally worn, and released from the leg of the slider in the event of a vehicle emergency. A seat belt device comprising: a locking mechanism for rotating the slider; and a drive section for moving the slider along the guide rail. 2. The sheet according to claim 1, wherein the locking mechanism is constituted by a protrusion formed on one member and a recess formed on the other member and engaged with the protrusion. belt device. 3. The seat belt device according to claim 2, wherein the protrusion of the locking mechanism is constructed to be destroyed by the action of the tension of the seat belt in the event of a vehicle emergency.