JPS6144054A - Seat belt device - Google Patents

Abstract

PURPOSE:To prevent a seat belt attaching position from dislocating, by engaging an anchor plate, supporting one end of a seat belt in a normal application mode, with a slider free of sliding motion along a guide rail, while making the engagement releasable in time of emergency. CONSTITUTION:An inner side end part 4 of a webbing 1 is attached to a car floor part 5 via a takeup roller 6, while an outer side end part 7 is connected to a slider 9 via an anchor plate 8. The slider is moved and guide along a guide rail 13 laid down along pillars 10, 11 and a roof guide 11, and further moved with rotation of a sprocket wheel 44 by a driving tape 24. In this case, a projection part 29 is formed in one end part of a leg part to which the anchor plate 8 of the slider 9 is attached with a bolt 27 and a nut 28, while a concave part 30, where the projection part 29 is engaged or disengaged, is formed in the anchor plate 8, and at usual time, with the engagement between them 29 and 30, unwilling turning motion in the anchor plate 8 is checked.

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, and particularly relates to a seat belt device that automatically attaches restraint webbing to the occupant after the occupant is seated. The present invention relates to a seat belt device that allows a person to wear a seat belt.

[Conventional technology]

The seat belt device protects the occupant by restraining the occupant using the webbing in the event of a vehicle emergency, so the occupant is safely protected without colliding with the steering wheel or the like.

However, in general, the rate of attachment of restraint webbing is extremely low due to factors such as the complexity of attachment.

Conventionally, seatbelt devices have been proposed that are capable of automatically attaching restraint 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 the 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 automatically released. is possible.

[Problem that the invention seeks to solve]

In such a seatbelt device, the slider needs to move 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 for the slider and guide rail to have sufficient strength to ensure safety. Further, the slider and the guide rail are arranged in a single chamber, and it is desirable that the volume thereof be 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 facts, and includes:
An object of the present invention is to provide a seat belt device that can always toss a seat belt to a fixed position for an occupant.

[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 which is rotatably supported on the leg of the slider and to which the seat belt is locked; The slider is provided with a locking mechanism that allows the slider to rotate by releasing the lock from the leg portion thereof, 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, preventing the seat belt from shifting in its attachment position relative to the occupant, and reliably restraining the occupant.

〔Example〕

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

In FIG. 1, the occupant restraint webbing 1 is diagonally wrapped around the body of an occupant 3 seated on an occupant seat 2.
The webbing is attached. The inch side end portion 4 of this 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, the outer end 7 of the webbing 1 is connected to a slider 9 via an anchor plate 8. Slider 91 is installed along the front pillar 10, roof side 11 and center pillar 12 of the vehicle.
It is inserted into the slider groove 14 of the guide rail 13 as shown in FIG. 2B (showing a part of the center pillar), FIG. 2B (showing the roof side part), and FIG. 3. This slider groove 14 extends along the longitudinal direction of the guide rail 13, and the slider 9 can move along this slider groove 14. The slider 9 is shown in FIGS. 4A and 4B. As shown in FIG.
It is formed from a body part 16 that extends vertically in a substantially T-shape from the center of the cross section of the body part 16, and leg parts 17 that extend 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 that forms 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 the same as that of the first shoe of the guide rail 13.
The radius of curvature R2 is set smaller than the radius of curvature R2 of the head groove 19 of the slider groove 14 in the curved portion 13A shown in the figure.
In the entire area where the guide rail 13 is provided, the first shoe 18
Both ends of the inner sliding surface 18A in the running direction are the head groove portion 1.
9 to ensure stable sliding contact.

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 with a rivet 22. This 27th 2-21 is a body groove portion 23 forming a substantially T-shape with the head groove portion 19 in the slider groove 14.
It is designed to be slidably guided toward the opening side of the

These first shoes 18 and second shoes 21 are molded from a synthetic resin such as nylon, which has extremely low frictional resistance, good wear 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 on the end side of the drive tape 24 . The drive tape 24 is movably inserted into a tape groove 26 extending in the longitudinal direction of the guide rail 13 and perpendicular to both sides of the middle part of the body groove 23 in the slider groove 14 of the guide rail 13. has been done. 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 inclined forward end side 13B along the . 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. has been done. Since the leg portion 17 is bent in this manner relative to the body portion 16, the webbing tension F acting on the end portion of the slider 9 via the anchor plate 8 and the arm portion against the corner portion of the head portion 15 are The length LIVi of the head portion 15 is smaller than the length L2 of the arm 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. The anchor plate 8 is engaged with the recess 30, and the relative position of the anchor plate 8 with respect to the slider 9 under normal use is fixed, and the occupant 3
The webbing 1 is oriented in a direction that does not cause discomfort to the wearer. In addition, in the event of a vehicle emergency, the webbing tension F
When this occurs, 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. 5, thereby reliably restraining the body of the occupant 3. It looks like this.

Note that the arrangement of the protrusions 29 and recesses 30 is not limited to the above embodiment, and the protrusions 29 may be formed on the anchor grate 8 and the recesses 30 may be formed on the leg portions 17. Here, the locking mechanism is composed of a protrusion and a recess. In the figure, 31 is a cover.

Attachment grooves 3 are formed continuously or intermittently in the longitudinal direction on both sides of the guide rail 13 on the inside and on the vehicle body side.
A guide rail 13 is formed in this mounting groove 32.
It covers the opening side of the slider groove 14 and stores and holds the base end sides of a pair of lips 33 for improving the aesthetic appearance. 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 into the guide rail 13, and also to prevent the rail components from deteriorating due to sunlight. In addition, the guide rail 13 and the lip 33 on the inside of the passenger compartment
is covered by a side garnish 34, and the lip 33 on the vehicle body side is held between the center pillar inner or the side inner of the roof 7 and the side surface of the guide rail 13. Note that the mounting groove 32 can accommodate not only the lip 33 but also a guide rail covering member such as a side garnish 34.

At the end of the guide rail 13 on the retreating end side 13C, there is a 1
As shown in FIGS. 5 and 6, an anchor pin 35 that can hold the distal end side of the head portion 15 of the slider 9 is fixed by a washer 36. As shown in FIGS.

This anchor/35 is disposed so as to penetrate through the body groove 23 between the head groove 19 and the tape groove 26 of the guide rail 13, and completely 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 portion of the head portion 15 of the slider 9 can finally be locked and held. Note that the anchor plate 8 is placed on the slider 9 with respect to the placement position of the anchor pin 35.
F) The bolt 27 is installed in such a way that the distance E between the line of action of the webbing tension F passing through the central axis of the bolt 27 and the central axis of the anchor pin 35 is small.
By arranging them close together, when the distal end side of the head section 15 of the slider 9 is locked and held by the anchor pin 35, it is possible to reduce the effect W exerted on the other end side of the head section 15 or the head groove section 19 of the guide rail 13. .

Further, a stop switch 38 is disposed at the rearward end @13C of the guide rail 13 via a mounting bracket 37, and an actuator 39 of the stop switch 38 is arranged so as to be able to enter into the head groove 19 of the guide rail 13. established,
A damper rubber 40 is provided on the opening side of the head groove portion 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 that is crowned by the head portion 15 pushes the actuator 39 to stop the movement of the drive tape 24, and The moving inertia force is absorbed by the damper rubber 40, and it stops in a quiet state near the anchor pin 35.

Furthermore, a seventh
A tape guide 41 as shown in the figure is arranged in a connected manner, and a tape track 42 is formed therein so as to be continuous with the tape groove 26 of the guide rail 13. The lower end of this tape guide 41 is communicated with a sprocket housing 43 attached to the lower part of the center pillar 12, and a rectangular opening 45 of the drive tape 24 is engaged with a sprocket wheel 44 pivotally supported within this sprocket housing 43. It looks like this.

A tape guide 46 is further connected to the sprocket housing 43, from which the drive chive 24 is pushed out after being engaged with the sprocket wheel 44. The sprocket wheel 44 inside the sprocket wheel 43 is rotated by the output shaft of a motor 48 that passes through the cap 47.
4 rotates the drive tape 24 to the guide rail 13,
The slider 9 is moved along the tape guides 41 and 46 between the backward end side 13C and the forward end side 13B of the guide rail 13 as described above. It is activated by detecting the condition. For example, when the passenger closes the door after seating, the sprocket wheel 4 is moved clockwise in Figure 1.
4 is rotated, 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 mentioned above. The slider 9 is moved toward the forward end side 13B of the guide rail 13 by rotating the hesproceratofoil 44 in the opposite direction.

Next, the operation of the above embodiment will be explained. When the occupant closes the door after seating, the motor 48 drives the drive tape 24 to move the slider 9 and the anchor plate 8 toward the rearward end side 13C of the guide rail 13, so that the occupant is seated in the vehicle and then closes the door. As shown in the figure, the webbing 1 is in the attached state. 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.

Since the slider 9 and the anchor plate 8 are 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 seatbelt for the occupant is stabilized. The mounting position is always constant.

When the occupant changes the driving position with the webbing 1 attached in this manner, by moving the occupant's upper body, the inner end 4 of the webbing 1 is applied to the winding force from the winding device 6. It is possible to unwind it against the resistance, and in this case,
The anchor plate 8 is prevented from moving in the longitudinal direction of the vehicle because the slider 9 is inserted into the vertical rearward end side 13C of the guide rail 13.

Next, when the vehicle is in an emergency situation such as a collision, the inertia lock mechanism in the winding device i16 suddenly stops unwinding the webbing 1 and the webbing 1.
This allows for a secure restraint state. That is, the outer end 7 of the webbing 1 is connected to the anchor plate 8.
This anchor plate 8 is engaged with the guide rail 1
3, the vehicle is prevented from moving in the longitudinal direction. 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 occupant to The webbing 1 is moved in a direction in which the webbing 1 can be reliably 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 moved toward the forward end side 13B of the guide rail 13 through movement of the drive tape 24. However, the webbing 1 is stopped in the state shown by the two-dot chain line in FIG. 1, and the occupant can easily get off the vehicle.

In this case as well, the slider 9 can be smoothly moved along the guide rail 13, as in the case where the slider 9 is moved to the rearward end side 13C of the guide rail 13 after a passenger gets on the vehicle.

In the above embodiment, the drive tape 24 was directly inserted into the body part 16 between the head section 15 and the 27th shoe 21, but as shown in FIG.
The ATM moving part 21B is formed to have a step 521C, and the driving chive 24 is inserted into the step 21C between the head part 15 and the 27th 2-21st sliding part 21B,
The drive tape 24 is attached to a second shoe 21A made of nylon or the like.
It may be made to contact the stepped portion 21C.

[Effect of the Invention] As described above, according to the present invention, the anchor plate is fixed to and integrated with the slider in usage modes other than vehicle emergencies, so that the anchor plate can be inadvertently moved due to movement of the slider. The seatbelt no longer rotates, and the seatbelt is always attached to the optimal body part, eliminating discomfort.In addition, in the event of a vehicle emergency, the slider and anchor plate are unlocked and follow the occupant's movements. The anchor plate rotates to securely restrain the occupant.

[Brief explanation of drawings]

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 a part of the center pillar, and Fig. 2B is an enlarged view of the roof side part. FIG. 3 is an exploded perspective view of the main parts of FIG. 2, FIG. 4A is a front view of the slider, and FIG.
Figure A is a side view, Figure 5 is a side view showing the state in which the slider is stopped at the retreating end of the guide rail, and Figure 6 is a side view of the slider shown in Figure 5.
FIG. 7 is a sectional view taken along line -Vl, FIG. 7 is an oblique view showing an exploded combination of the drive tape and sprocket foil, and 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 part,
17... Leg portion, 24... Drive tape, 26...
- Tape groove, 29... Protrusion, 30... Recess.

Claims (3)

[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 seat belt rotatably supported by the leg part of the slider. An anchor plate to which is locked, and the anchor plate is locked and fixed to the leg of the slider when the seat belt is normally worn, and is released from the leg of the slider and rotated in the event of a vehicle emergency. a locking mechanism;
A seat belt device comprising: a drive section for moving the slider along the guide rail. (2) Claim 1, wherein the locking mechanism is constituted by a protrusion formed on one member and a recess formed on the other member and locked by the protrusion. seat belt device. (3) The seat belt device according to claim 2, wherein the protruding portion 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.