JP3965990B2 - Vehicle seat belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a front seat and a rear seat in a vehicle interior, and a single opening on the side of the vehicle body can be opened and closed by the front door and the rear door. The front portion of the front door is provided via a hinge and the rear portion of the rear door is The present invention relates to a vehicle seat belt device having a so-called Lee Style door that is supported by a vehicle body via a hinge so as to be opened and closed.
[0002]
[Prior art]
Generally, in a vehicle such as a passenger car, a retractor that winds up a webbing of a three-point seat belt device for a front seat, a shoulder anchor that slidably supports the webbing on the outer side of the passenger, and the webbing on the lower side of the outer side of the passenger. The lap anchor that is fixedly supported is usually arranged at the center pillar of the vehicle body.
[0003]
On the other hand, in a vehicle without a center pillar and having a so-called free-style door, the retractor, shoulder anchor, and lap anchor for these three-point seat belt devices for the front seats can be used for getting on and off passengers. In consideration of this, what is provided on the rear door is known (see Japanese Patent Application Laid-Open Nos. 2001-105864 and 2001-138864).
[0004]
In the conventional structure in which the lap anchor is disposed at the center pillar of the vehicle body, the position (anchor point) of the wrap anchor is disposed below the lower edge of the door, whereas the structure disclosed in each of the above publications As described above, when the lap anchor is arranged on the rear door, the lap anchor needs to be arranged above the lower edge of the door so as not to hinder the opening and closing of the rear door, and the anchor point becomes high. There is no particular problem with a vehicle with a high occupant seating position (so-called hip point), but there is a problem with a vehicle with a relatively low occupant seating position.
[0005]
In other words, when the lap anchor is placed on the rear door, the anchor point of the lap anchor is higher than the side sill, so in a vehicle with a low hip point, the occupant restraint position by webbing is relatively high when restraining the occupant by the seat belt. Thus, there is a problem that the occupant restraint is not properly executed, such as the abdomen of the occupant being pressed by the webbing.
[0006]
[Problems to be solved by the invention]
And a drive mechanism that drives the movable anchor downward when the rear door is opened and converts the movement when the rear door is closed into a driving force when the rear door is closed. By providing a vehicle-side anchor means that engages the movable anchor that has moved downward when the rear door is closed, and is fixed to the vehicle body, even if the vehicle has a relatively low occupant seating position (so-called hip point), The restraint of the seat occupant can be obtained, the safety of the front seat occupant and the ease of getting on and off the rear seat occupant can be achieved, and the movable anchor can be mechanically pulled out by closing the rear door, It is an object of the present invention to provide a vehicle seat belt device that can be improved in fail-safeness without failure.
[0007]
[Means for Solving the Problems]
The vehicle seat belt device according to the present invention includes front and rear seats in the vehicle interior, and a single opening on the side of the vehicle body can be opened and closed by a front door and a rear door, and the front portion of the front door is connected via a hinge, The rear part of the rear door is a vehicle seat belt device supported by a vehicle body through a hinge so as to be openable and closable, and the seat belt device is provided in the rear door and winds the webbing provided in the rear door. A retractor, a shoulder anchor provided at the upper part of the rear door for supporting the webbing, a tongue buckle member for attaching and detaching the webbing to and from the vehicle body, and a movable anchor for fixing and supporting the webbing at the lower part of the front seat occupant. When the rear door is opened, the movable anchor is driven upward to a position that does not hinder the opening and closing of the rear door. In both cases, when the rear door is closed, the movement when the rear door is closed is converted into driving force, and the drive mechanism that drives the movable anchor downward is engaged with the movable anchor that has moved downward when the rear door is closed, and is fixed to the vehicle body. And anchor means on the vehicle body side.
[0008]
The anchor means having the above configuration can be composed of an anchor pin, an anchor bracket, an anchor rail, or the like.
According to the above configuration, when the rear door is closed from the open state, the drive mechanism converts the movement when the rear door is closed into driving force, drives the above-mentioned movable anchor downward, and the movable anchor driven downward is Engages with anchor means on the vehicle body side.
[0009]
Since the engagement position between the movable anchor and the anchor means is an anchor point, appropriate front seat occupant restraint can be obtained even in a vehicle having a relatively low occupant seating position (so-called hip point).
[0010]
When the front seat occupant pulls out the webbing after the movable anchor and the anchor means are engaged and the tongue buckle member is mounted on the vehicle body side, the front seat occupant can be restrained by the three-point seat belt structure.
[0011]
On the other hand, when the rear door is opened, the above-described drive mechanism drives the movable anchor upward to a position where there is no hindrance to opening and closing the rear door. As a result, the webbing does not remain at the foot of the rear seat occupant, and the webbing is mounted on the rear door.
[0012]
In this way, the safety of the front seat occupant and the ease of getting on and off the rear seat occupant can be achieved, and the movable anchor can be mechanically pulled out by closing the rear door, so there is no failure and there is no failure. Safety can be improved, and in addition, energy saving can be achieved for the configuration in which the movable anchor is pulled out by the electric motor.
[0013]
In one embodiment of the present invention, the drive mechanism drives the movable anchor by changing the distance between the rear door and the side sill adjacent to the rear door when the rear door is closed.
[0014]
According to the above configuration, since the movable anchor is driven by the change in the distance from the side sill when the rear door is closed, the movable anchor can be reliably moved down when the door is closed while effectively using the existing side sill.
[0015]
In one embodiment of the present invention, the drive mechanism is disposed in the rear door and the rear door trim.
According to the above configuration, the drive mechanism can be incorporated in the rear door and the rear door trim.
[0016]
In one embodiment of the present invention, the drive mechanism includes a detection unit that projects from the rear door toward the side sill and is displaced by contact with the side sill to detect a change in the distance between the rear door and the side sill, and the detection unit. A transmission unit that transmits the interval change detected by the transmission unit to the movable anchor, and a conversion unit that converts the displacement due to the interval change transmitted by the transmission unit into a downward movement of the movable anchor.
[0017]
The detection unit configured as described above can be configured by a detection member or a detection mechanism, the transmission unit can be configured by a transmission member or a transmission mechanism, and the conversion unit can be configured by a conversion member or a conversion mechanism. it can.
[0018]
According to the above configuration, the detecting unit detects a change in the distance between the rear door and the side sill, the transmitting unit transmits the detected interval change to the movable anchor, and the converting unit is based on the transmitted interval change. The displacement is converted into a downward movement of the movable anchor.
For this reason, the interval change can be reliably converted into the downward movement of the movable anchor.
[0019]
In one embodiment of the present invention, the drive mechanism or the movable anchor is provided with a biasing means for biasing the movable anchor upward or a damper for buffering the downward movement of the movable anchor.
[0020]
According to the above configuration, when the movable anchor is lowered, the damper can be buffered by the damper to protect the movable anchor, while the movable anchor is moved upward (when the door is opened). The anchor can be moved up as quickly as possible.
[0021]
【Example】
An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show a vehicle seat belt device. First, a vehicle body structure and a door structure will be described with reference to FIGS.
[0022]
As shown in FIGS. 1 and 2, a side door composed of a front door 2 and a rear door 3 is provided on the vehicle body side surface of the vehicle 1, and a front end portion of the front door 2 and a rear end portion of the rear door 3 are provided. A front door hinge 4 and a rear door hinge 5 as hinge portions are provided to form a so-called freestyle side door.
[0023]
The front door 2 and the rear door 3 constituting these side doors are respectively provided with door panels 6, 7, door sashes 8, 9, and window glasses 10, 11. A side impact bar (not shown) extending in the front-rear direction is provided.
[0024]
Further, the front door 2 is provided with a door outer handle (not shown) for opening and closing the front door 2 from the outside of the vehicle and a door mirror 12 for visually recognizing the rear of the vehicle.
[0025]
The door of the free style structure of this embodiment is configured such that the front door 2 is opened preferentially, and the rear door 3 is allowed to open after the front door 2 is opened.
[0026]
A front seat entrance 13a and a rear seat entrance 13b are formed as door openings (vehicle side openings) on the side of the side door. The front door 2 opens and closes, the rear seat entrance 13b is opened and closed by the rear door 3, and these entrances 13a and 13b are opened and closed by both doors 2 and 3 in a single continuous opening 13 (single A center pillar-less vehicle body is formed.
[0027]
As shown in FIG. 1, lock portions 14 and 15 for locking the rear door 3 with the body are provided above and below the front portion of the rear door 3, and the front door 2 is positioned between the front end portions of the rear door 3. A lock portion 17 for locking the striker 16 is provided.
[0028]
On the other hand, as shown in FIG. 2, a front seat 21 is attached to the floor panel 18 via a bracket 19 and a seat slide device 20.
The front seat 21 includes a seat cushion 22, a seat back 23, and a headrest 24. A buckle 25 (see FIG. 5) is provided on the tunnel portion side of the seat cushion 22 in the front seat 21, and the buckle 25 is a bracket. It is being fixed to the floor panel 18 via 26, or the seat cushion side via stalk.
[0029]
A kick-up portion is formed integrally or integrally with the rear portion of the floor panel 18 described above, and a seat cushion of a rear seat 27 (see FIG. 1) is attached to the top deck surface (upper surface) of the kick-up portion. That is, as shown in FIG. 1, a plurality of rows of seats 21 and 27 are arranged in the front and rear of the vehicle 1.
[0030]
FIG. 2 is a partial front view showing the front seat 21 and the rear door 3 described above, and is provided with a webbing 28 of a seat belt device for restraining a front seat occupant seated on the front seat 21.
[0031]
The webbing 28 is configured to be wound up by a retractor 31 disposed in an inner lower region of a door front structure having rigidity equivalent to a center pillar in a rear door 3 having a door outer panel 29 and a door inner panel 30. ing. The retractor 31 winds the webbing 28 so that it can be held in the event of a collision.
[0032]
A shoulder anchor 32 is attached to the upper portion of the door front structure on the vehicle compartment side so as to correspond to the position of the headrest 24 of the front seat 21.
[0033]
The webbing 28 fed out from the retractor 31 is led out into the vehicle interior via the opening portion of the door inner panel 30 and the upper opening 34 of the door trim 33 provided in the rear door 3, and then the shoulder anchor 32. The intermediate portion is supported and extends to the passenger compartment side.
[0034]
A tongue buckle member 36 is movably provided at an extended intermediate portion of the webbing 28 (an intermediate portion led out toward the passenger compartment), and an extended end portion of the webbing 28, that is, a lower end portion of the webbing 28 is a movable anchor 37. It is connected to the lower part of the so-called lap anchor.
[0035]
On the other hand, a side sill closed section 41 having a side sill inner 38, a side sill outer 39, and a side sill reinforcement 40 is provided on both the left and right sides of the floor panel 18 (only one is shown in the drawing). A side sill 42 as a vehicle body rigid member is provided, and an anchor means is provided so that a portion (high rigidity portion) where the side sill inner 38 and the side sill reinforcement 40 are superposed on the side sill 42 protrudes toward the vehicle compartment side. As an anchor pin 43 (fixed anchor means on the vehicle body side) is provided. The anchor pin 43 is attached to the side sill 42 so as to be lower than the position of the lower edge portion of the rear door 3.
[0036]
Here, the vehicle compartment side end of the anchor pin 43 described above is supported by a bracket 44 provided on the floor panel 18, while the anchor pin 43 and the bracket 44 are covered by a cover member 45 to improve the appearance. Yes. Further, the upper joint portion of the side sill inner 38 and the side sill outer 39 and the contact portion of the cover member 45 are covered with a scarf plate 46 made of synthetic resin. The above-described cover member 45 is provided with an opening for taking in and out the movable anchor and for avoiding interference with the lower end of the webbing 28.
[0037]
As shown in FIGS. 2, 3, and 4, the movable anchor 37 described above is supported by a support member 47 so as to be movable in the vertical direction, and the movable anchor 37 is moved upward on the movable anchor 37. A coil spring 48 as a biasing means for biasing, and a damper 49 for buffering the downward movement of the movable anchor 37 are provided.
[0038]
A drive mechanism 50 for driving the movable anchor 37 is provided inside the rear door 3 and the rear trim 33 described above.
The drive mechanism 50 drives the movable anchor 37 upward when the rear door 3 is opened to a position that does not hinder the opening and closing of the rear door 3, and converts the movement of the rear door 3 when the rear door 3 is closed into a driving force. Thus, the movable anchor 37 is driven downward along the support member 47.
[0039]
Specifically, the drive mechanism 50 described above has a substantially L-shaped link 52 supported by an intermediate portion or a support shaft 51 (fulcrum) and a long hole 52a formed at one end (lower end) of the link 52. On the other hand, a link 54 is connected as a detection unit that is linked via a pin 53, protrudes from the rear door 3 toward the side sill 42, and is displaced by contact with the side sill 42 to detect a change in the distance between the rear door 3 and the side sill 42. And a spring 25 (linking means) provided between the other end (upper end) of the link 52 and the upper portion of the movable anchor 37.
[0040]
That is, the drive mechanism 50 drives the movable anchor 37 by changing the distance between the rear door 3 and the side sill 42 to which the lower portion of the rear door 3 is close when the rear door 3 is closed. A detecting unit (see link 54) that detects the change in the distance between the rear door 3 and the side sill 42 by projecting toward the side sill 42 and being displaced by contact with the side sill 42, and the interval change detected by the detecting unit. A transmission unit (refer to each of the elements 51, 52, 53, and 55) that transmits to the movable anchor 37, and a conversion unit (link 52) that converts the displacement due to the change in distance transmitted by the transmission unit into movement below the movable anchor 37 Reference). In this embodiment, the above-described link 52 is configured to serve as both a transmission unit and a conversion unit.
On the other hand, the lower part of the above-mentioned movable anchor 37 projects downward from the opening 35 at the lower part of the door trim 33.
[0041]
Further, as shown in FIG. 4, an engaging recess 37 a that engages with the anchor pin 43 on the vehicle body side and a fixing portion 37 b that fixes the end of the webbing 28 are formed at the lower portion of the above-described movable anchor 37.
[0042]
The operation of the vehicle seat belt apparatus configured as described above will be described in detail below.
When the rear door 3 is closed as shown in FIG. 3 from the opened state of the rear door 3 shown in FIG. 2, the distance between the lower portion of the rear door 3 and the side sill 42 changes from large to small. The contact link 54 (the link on the driving side) is immersed in the rear door 3, and the movement of the link 54 is transmitted to the link 52 (the link on the driven side) via the pin 53.
[0043]
Since the above-described link 52 rotates around the support shaft 51 in the clockwise direction in the figure, the movable anchor 37 connected to the other end of the link 52 via a spring 55 is guided by the support member 47 while being lowered. It moves and engages with the anchor pin 43 on the vehicle body side.
[0044]
The moving speed of the movable anchor 37 is buffered by the damper 49.
After the engagement between the two 37 and 43, the front seat occupant pulls out the webbing 28 and the tongue buckle member 36 is attached to the buckle 25 shown in FIG. 5, thereby restraining the front seat occupant with a three-point seat belt structure. The load applied to the webbing 28 can be received on the vehicle body side via the anchor pin 43.
[0045]
On the other hand, when the front seat occupant removes the tongue buckle member 36 from the buckle 25 when getting off the vehicle, the webbing 28 is wound up by the retractor 31 as shown in FIG. 3, and thereafter, from the state shown in FIG. 3 as shown in FIG. When the rear door 3 is opened, the movable anchor 37 moves upward while being guided by the support member 47 by the spring force of the coil spring 48 as the urging means, so that the engagement between the movable anchor 37 and the anchor pin 43 is released. The movable anchor 37 is driven upward to a position that does not hinder the opening and closing of the rear door 3, and the drive mechanism 50 returns to the normal position shown in FIG. Thus, since the webbing 28 is mounted on the rear door 3 side, the webbing 28 does not remain at the feet of the rear seat occupant, and convenience when getting off can be improved.
[0046]
As described above, the vehicle seat belt device of the embodiment shown in FIGS. 1 to 5 includes front and rear seats (see the front seat 21 and the rear seat 27) in the vehicle interior, and the single opening 13 on the side of the vehicle body has the front. A vehicle seat that can be opened and closed by a door 2 and a rear door 3, the front portion of the front door 2 being supported by the vehicle body via a hinge 4, and the rear portion of the rear door 3 being supported by the vehicle body via a hinge 5. A belt device, in which the seat belt device restrains the front seat occupant, a retractor 31 provided in the rear door 3 to wind up the webbing 28, and a shoulder provided on the rear door 3 to support the webbing 28. An anchor 32, a tongue buckle member 36 for attaching / detaching the webbing 28 to / from the vehicle body, and the webbing 28 at the lower part on the outer side of the front seat occupant With the movable anchor 37 that is fixedly supported, when the rear door 3 is opened, the movable anchor 37 is driven upward to a position that does not hinder the opening and closing of the rear door 3, and when the rear door 3 is closed, the rear door 3 is closed. A vehicle-side anchor means for converting the movement into a driving force and engaging the driving mechanism 50 that drives the movable anchor 37 downward with the movable anchor 37 that has moved downward when the rear door 3 is closed and fixed to the vehicle body ( An anchor pin 43).
[0047]
According to this configuration, when the rear door 3 is closed from the open state, the drive mechanism 50 converts the movement when the rear door 3 is closed into driving force, and drives the movable anchor 37 downward, and is driven downward. The movable anchor 37 engages with anchor means (see anchor pin 43) on the vehicle body side.
[0048]
Since the engagement position between the movable anchor 37 and the anchor means (see the anchor pin 43) is an anchor point, even if the vehicle has a relatively low occupant seating position (so-called hip point), the front seat occupant is appropriately restrained. can get.
[0049]
When the front seat occupant pulls out the webbing 28 and engages the tongue buckle member 36 on the vehicle body side (see the buckle 25) after the engagement of the movable anchor 37 and the anchor means (see the anchor pin 43), the three-point seat belt. The front seat occupant can be restrained by the structure.
[0050]
On the other hand, when the rear door 3 is opened, the drive mechanism 50 described above drives the movable anchor 37 upward to a position where there is no hindrance to opening and closing the rear door 3. As a result, the webbing 28 does not remain at the foot of the rear seat occupant, and the webbing 28 is mounted on the rear door 3.
[0051]
Thus, both the safety of the front seat occupant and the ease of getting on and off of the rear seat occupant can be achieved, and the movable anchor 37 can be mechanically pulled out by closing the rear door 3, so that there is no failure. Further, the fail-safe property can be improved, and in addition, energy saving can be achieved with respect to the configuration in which the movable anchor 37 is pulled out by the electric motor.
[0052]
The drive mechanism 50 drives the movable anchor 37 when the rear door 3 is closed by changing the distance between the lower part of the rear door 3 and the adjacent side sill 42.
[0053]
According to this configuration, since the movable anchor 37 is driven by a change in the distance between the rear door 3 and the side sill 42 when the door 3 is closed, the movable anchor 37 is reliably used when the door 3 is closed while effectively using the existing side sill 42. Can be moved down.
[0054]
Further, the drive mechanism 50 is disposed in the rear door 3 and the rear door trim 33.
According to this configuration, the drive mechanism 50 can be incorporated in the rear door 3 and the rear door trim 33.
[0055]
In addition, the drive mechanism 50 projects from the rear door 3 toward the side sill 42 and is displaced by contact with the side sill 42 to detect a change in the distance between the rear door 3 and the side sill 42 (see link 54). A transmission unit (see each of the elements 51, 52, 53, and 55) that transmits the interval change detected by the detection unit to the movable anchor 37, and the displacement due to the interval change transmitted by the transmission unit. And a conversion section (see link 52) for converting the movement downward.
[0056]
According to this configuration, the detection unit (see the link 54) detects a change in the distance between the rear door 3 and the side sill 42, and the transmission unit (see the elements 51, 52, 53, and 55) is detected. The change in the distance is transmitted to the movable anchor 37, and the converter (see the link 52) converts the displacement due to the transmitted distance change into the downward movement of the movable anchor 37.
For this reason, the interval change can be reliably converted into the downward movement of the movable anchor 37.
[0057]
The drive mechanism 50 or the movable anchor 37 is provided with a biasing means (see the coil spring 48) for biasing the movable anchor 37 upward or a damper 49 for buffering the downward movement of the movable anchor 37. It is.
[0058]
According to this configuration, when the movable anchor 37 is moved downward, the damper 49 can buffer the downward movement to protect the movable anchor 37, while the movable anchor 37 is moved upward (when the door is opened). The movable anchor 37 can be moved up as quickly as possible by the biasing force of the coil spring 48.
[0059]
FIG. 6 shows another embodiment of the seat belt device for a vehicle, which is provided with a rigid cover member 56 that supports the end portion of the anchor pin 43 on the side opposite to the side sill and also serves as a cover member, and between the side sill inner 38 and the floor panel 18. The anchor pins 43 are both supported by the rigid cover member 56 joined therebetween.
If comprised in this way, reduction of a number of parts and an assembly man-hour can be aimed at.
[0060]
7, 8 and 9 show still another embodiment of a vehicle seat belt apparatus.
In this embodiment, a drive mechanism 57 is constituted by a parallel link mechanism, and when the rear door 3 is opened (see FIG. 7), the drive mechanism 57 drives the movable anchor 37 upward to a position that does not hinder the opening and closing of the rear door 3. At the same time, when the rear door 3 is closed (see FIG. 8), the movement when the rear door 3 is closed is converted into a driving force to drive the movable anchor 37 downward.
[0061]
The drive mechanism 57 based on the parallel link mechanism described above includes an upper link 59 pivotally supported by the support shaft 58 and a lower link 61 pivotally supported by the support shaft 60. One end of each of the links 59 and 61 is pinned. The movable anchor 37 is connected via 62 and 63.
[0062]
However, in this embodiment, the above-mentioned movable anchor 37 is formed in an L-shaped cross section.
Further, the lower link 61 is formed in a bowl shape, and the other end of the lower link 61 protrudes from the rear door 3 toward the side sill 42 and is displaced by contact with the side sill 42 to be spaced between the rear door 3 and the side sill 42. It is set to a detection unit that detects a change.
[0063]
Moreover, in this embodiment, as in the previous embodiment, the drive mechanism 57 drives the movable anchor 37 by changing the distance between the lower portion of the rear door 3 and the adjacent side sill 42 when the rear door 3 is closed. .
[0064]
That is, the drive mechanism 57 includes the above-described detection unit (see the lower link 61), a transmission unit (see the lower link 61) that transmits the interval change detected by the detection unit to the movable anchor 37, and the transmission unit. And a conversion section (see the upper and lower links 59 and 61) for converting the displacement due to the change in the distance transmitted by the movement into the downward movement of the movable anchor 37, and driving the parallel link configuration composed of the elements 58 to 63 described above. The mechanism 57 is disposed in the rear door 3 and the rear trim 33.
[0065]
In this embodiment, since the parallel link mechanism also serves as a support member for the movable anchor 37, the support member 47 as in the previous embodiment is omitted. Also in this embodiment, a coil spring 48 is provided as a biasing means for biasing the above-mentioned movable anchor 37 upward. In the figure, reference numeral 64 denotes a stopper.
[0066]
The operation of the vehicle seat belt apparatus configured as described above will be described in detail below.
When the rear door 3 is closed as shown in FIG. 8 from the opened state of the rear door 3 shown in FIG. 7, the distance between the lower portion of the rear door 3 and the side sill 42 changes from large to small. The contacted lower link 61 is immersed in the rear door 3, and the lower link 61 rotates around the support shaft 60 in the clockwise direction shown in the figure.
[0067]
Similarly, the upper link 59 that constitutes the parallel link also rotates in the clockwise direction shown in the figure about the support shaft 58, so that the movable anchor 37 connected to one end side of both the links 59 and 61 moves downward, Engages with the anchor pin 43 on the vehicle body side.
[0068]
After the engagement between the two 37 and 43, the front seat occupant pulls out the webbing 28 and the tongue buckle member 36 is attached to the buckle 25 shown in FIG. 5, thereby restraining the front seat occupant with a three-point seat belt structure. The load applied to the webbing 28 can be received on the vehicle body side via the anchor pin 43.
[0069]
On the other hand, when the front seat occupant removes the tongue buckle member 36 from the buckle 25 when getting off the vehicle, the webbing 28 is wound up by the retractor 31 and becomes as shown in FIG. 8, and thereafter, from the state shown in FIG. 8 as shown in FIG. When the rear door 3 is opened, the movable anchor 37 is moved upward by the spring force of the coil spring 48 as an urging means, so that the engagement between the movable anchor 37 and the anchor pin 43 is disengaged, and the movable anchor 37 is moved to the rear door. 3 is driven upward to a position where there is no hindrance to opening and closing 3, and the drive mechanism 57 returns to the normal position shown in FIG. 7. Thus, since the webbing 28 is mounted on the rear door 3 side, the webbing 28 does not remain at the feet of the rear seat occupant, and convenience when getting off can be improved.
[0070]
In the embodiment shown in FIGS. 7, 8, and 9 described above, other configurations, operations, and effects are almost the same as those in the previous embodiment. The same parts are denoted by the same reference numerals, and detailed description thereof is omitted.
[0071]
10, FIG. 11, FIG. 12, and FIG. 13 show still another embodiment of a vehicle seat belt device.
In this embodiment, an anchor rail 65 is fixed to a predetermined portion of the side sill inner 38 instead of the anchor pin 43. The anchor rail 65 is substantially concave as shown in FIGS. 11 and 12, and has a stopper 66 at the lower end thereof.
[0072]
The movable anchor 37 includes an upper slider 68 having a pin 67, a lower slider 71 to which the anchor bracket 70 is fixed by a bolt 69, and a leaf spring member 72 (flexible rigid member) that connects the upper and lower sliders 68 and 71 to each other. ), And the leading end of the webbing 28 is fixed to the webbing attachment 70b of the anchor bracket 70.
[0073]
Here, the above-described anchor rail 65 fixes the lower slider 71 in the movable anchor 37 to the position of the stopper 66 (see FIG. 13), and the lower slider 71 on the rear door 3 side closes the anchor rail on the vehicle body side when the rear door is closed. The anchor rail 65 is configured to have a tapered shape in which the upper portion of the anchor rail 65 is large and the lower portion of the anchor rail 65 is small so that the transfer to the 65 can be surely performed.
[0074]
In addition, a drive mechanism 73 is provided. When the rear door 3 is opened (see FIG. 10), the drive mechanism 73 drives the movable anchor 37 upward to a position that does not hinder the opening and closing of the rear door 3, and closes the rear door 3. In some cases (see FIG. 13), the movement when the rear door 3 is closed is converted into a driving force so that the movable anchor 37 is driven downward.
[0075]
The above-described drive mechanism 73 supports the movable anchor 37 and a substantially L-shaped link 74 in which a long hole 74a is formed in an upper portion, an intermediate portion is pivotally supported by a support shaft 75, and a lower portion is set as a detection portion. A guide rail 76 having a substantially U-shaped cross section that also serves as a support member and a curved shape is provided, and a pin 67 of the upper slider 68 slidably inserted into the guide rail 76 is inserted from the guide groove 76a of the guide rail 76. It protrudes outward and is inserted into the long hole 74a of the link 74 described above.
[0076]
The lower portion of the link 74 is set as a detection unit that protrudes from the rear door 3 toward the side sill 42 and is displaced by contact with the side sill 42 to detect a change in the distance between the rear door 3 and the side sill 42. Yes.
[0077]
Also in this embodiment, like the previous embodiments, the drive mechanism 73 described above drives the movable anchor 37 by changing the distance between the rear door 3 and the side sill 42 to which the lower portion of the rear door 3 is close when the rear door 3 is closed.
[0078]
That is, the drive mechanism 73 includes the above-described detection unit (see the link 74), a transmission unit (see the long hole 74a) that transmits the interval change detected by the detection unit to the above-described movable anchor 37, and the transmission unit. And a conversion section (see guide rail 76) for converting the displacement due to the change in the distance transmitted by the movement into the downward movement of the movable anchor 37, and a drive mechanism 73 comprising the above-described elements 74, 74a, 75, 76, 76a. Are disposed in the rear door 3 and the rear trim 33.
[0079]
In this embodiment, a coil spring 48 as an urging means for urging the movable anchor 37 upward is provided on the link 74 side, and a stopper 64 for restricting the normal position of the link 74 is provided.
Further, a concave notch 76 b that holds the lower slider 71 is formed on the upper side of the curved lower end side of the guide rail 76 described above.
[0080]
The operation of the vehicle seat belt apparatus configured as described above will be described in detail below.
When the rear door 3 is closed as shown in FIG. 13 from the opened state of the rear door 3 shown in FIG. 10, the distance between the lower portion of the rear door 3 and the side sill 42 changes from large to small. The contacted link 74 is immersed in the door 3 and the movement of the link 74 rotating clockwise with the support shaft 75 as a fulcrum is transmitted to the upper slider 68 of the movable anchor 37 through the long hole 74a and the pin 67. Is done.
[0081]
The movable anchor 37 moves downward while the leaf spring member 72 connecting the upper and lower sliders 68 and 71 is appropriately displaced by the guide rail 76, so that the lower slider 71 of the movable anchor 37 moves to the rear door 3 side. From the vehicle body side to the anchor rail 65, and the lower slider 71 is engaged and fixed to the anchor rail 65 at the position of the stopper 66 of the anchor rail 65.
[0082]
After the engagement of both 37 and 65, when the front seat occupant pulls out the webbing 28 and the tongue buckle member 36 is attached to the buckle 25 shown in FIG. 5, the front seat occupant is restrained by the three-point seat belt structure. The load applied to the webbing 28 can be received on the vehicle body side via the anchor rail 65.
[0083]
On the other hand, when the front seat occupant removes the tongue buckle member 36 from the buckle 25 when getting off the vehicle, the webbing 28 is wound up by the retractor 31 and becomes as shown in FIG. 13, and thereafter, from the state shown in FIG. 13 as shown in FIG. When the rear door 3 is opened, the movable anchor 37 moves upward while being guided by the guide rail 76 via the link 74 by the spring force of the coil spring 48 as the urging means, so that the movable anchor 37 and the anchor rail 65 are Is disengaged, and the movable anchor 37 is driven upward to a position where there is no hindrance to the opening and closing of the rear door 3, and the drive mechanism 73 moves back to the normal position shown in FIG. Thus, since the webbing 28 is mounted on the rear door 3 side, the webbing 28 does not remain at the feet of the rear seat occupant, and convenience when getting off can be improved.
[0084]
In the embodiment shown in FIGS. 10 to 13 described above, the other configurations, functions, and effects are almost the same as those in the previous embodiments. Therefore, in FIGS. The same reference numerals are assigned and detailed description thereof is omitted.
[0085]
In the correspondence between the configuration of the present invention and the above-described embodiment,
The front and rear seats of the present invention correspond to the front seat 21 and the rear seat 27 of the embodiment,
Similarly,
The anchor means corresponds to the anchor pin 43 or the anchor rail 65,
The detection unit corresponds to the link 54, the lower link 61, and the link 74,
The transmission portion corresponds to the support shaft 51, the link 52, the pin 53, the spring 55, the lower link 61, and the long hole 74a.
The conversion unit corresponds to the link 52, the upper and lower links 59 and 61, and the guide rail 76,
The biasing means corresponds to the coil spring 48,
The present invention is not limited to the configuration of the above-described embodiment.
【The invention's effect】
According to the present invention, when the rear door is opened, the movable anchor is driven up to a position that does not hinder the opening and closing of the rear door, and when the rear door is closed, the movement when the rear door is closed is converted into driving force to drive the movable anchor downward. Since the mechanism and the anchor means on the vehicle body side that engages the movable anchor that moved downward when the rear door is closed and fixed to the vehicle body are provided, it is suitable even for vehicles with relatively low occupant seating positions (so-called hip points) The front seat occupant can be restrained, the safety of the front seat occupant and the ease of getting on and off the rear seat occupant can be achieved, and the movable anchor can be mechanically pulled out by closing the rear door. Thus, there is no failure and the fail-safe property can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a vehicle provided with a seat belt device of the present invention.
FIG. 2 is a front view showing a seat belt device of a vehicle.
FIG. 3 is an explanatory diagram when the rear door is closed.
4 is a schematic side view of FIG. 3. FIG.
FIG. 5 is a front view of a front seat.
FIG. 6 is a sectional view showing another embodiment of the anchor pin support structure.
FIG. 7 is a front view showing another embodiment of a seat belt device for a vehicle.
FIG. 8 is an explanatory diagram when the rear door is closed.
9 is a schematic side view of FIG. 8. FIG.
FIG. 10 is a partially enlarged front view showing still another embodiment of the seat belt device for a vehicle.
11 is a schematic side view of FIG.
FIG. 12 is an exploded perspective view of a main part.
FIG. 13 is an explanatory diagram when the rear door is closed.
[Explanation of symbols]
2 ... Front door
3 ... Rear door
13 ... Opening
21 ... Front seat (front seat)
27 ... Rear seat (rear seat)
28 ... Webbing
31 ... Retractor
32 ... Shorda Anka
36 ... tongue buckle member
37 ... Moveable anchor
42 ... side sills
43 ... Ankapin (anchor means)
48 ... Coil spring (biasing means)
49 ... Damper
50 ... Drive mechanism
51 ... support shaft
52, 54 ... Links
53 ... pin
55 ... Spring
57 ... Drive mechanism
59,61 ... link
65. Anchor rail (anchor means)
73 ... Drive mechanism
74 ... Link
74a ... Long hole
76 ... Guide rail

Claims (5)

Front and rear seats are provided in the passenger compartment, and a single opening on the side of the vehicle body can be opened and closed by a front door and a rear door. The front portion of the front door is connected via a hinge and the rear portion of the rear door is connected via a hinge. A vehicle seat belt device supported to be openable and closable,
A webbing in which the seat belt device restrains the front seat occupant;
A retractor that is provided in the rear door and winds up the webbing;
A shoulder anchor provided at the upper part of the rear door to support the webbing,
A tongue buckle member for attaching and detaching the webbing to the vehicle body;
With a movable anchor that fixedly supports the webbing in the lower part of the vehicle exterior of the front seat occupant,
A driving mechanism that drives the movable anchor upward to a position that does not hinder the opening and closing of the rear door when the rear door is open, and converts the movement when the rear door is closed into driving force when the rear door is closed, and drives the movable anchor downward; ,
A vehicle seat belt device comprising vehicle body-side anchor means for engaging a movable anchor that has moved downward when the rear door is closed and fixing it to the vehicle body. 2. The seat belt device for a vehicle according to claim 1, wherein the drive mechanism drives the movable anchor when the rear door is closed by changing a distance between the lower side of the rear door and a side sill adjacent thereto. 3. The vehicle seat belt apparatus according to claim 2, wherein the drive mechanism is disposed in a rear door and a rear door trim. The drive mechanism protrudes from the rear door toward the side sill and is displaced by contact with the side sill to detect a change in the distance between the rear door and the side sill, and the change in the distance detected by the detection unit is movable. A transmission section for transmitting to the anchor;
The vehicle seat belt device according to claim 3, further comprising: a conversion unit that converts the displacement due to the change in distance transmitted by the transmission unit into a downward movement of the movable anchor. 5. The vehicle seat according to claim 1, wherein the driving mechanism or the movable anchor is provided with a biasing means for biasing the movable anchor upward or a damper for buffering the downward movement of the movable anchor. Belt device.

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