JPH0249172Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to a webbing guide mechanism that is used in a seat belt device for protecting an occupant in a vehicle emergency and is disposed between an occupant and a webbing retractor. [Problems to be solved by the prior art and the invention] In the webbing retractor, one end of the webbing for restraining an occupant is attached to a take-up shaft, and the take-up shaft is rotated by the biasing force of a mainspring spring to wind the webbing in layers. I'm starting to take it. Further, the webbing retractor is generally fixed to the side wall of the vehicle body, and the webbing pulled out from the retracting shaft is folded back at a slip joint provided above the vehicle and then used as shoulder webbing. In this type of seatbelt device, since the webbing is folded back at an acute angle at the slip joint, there is a problem in that the frictional resistance between the two members increases during movement. In order to solve this problem, conventional systems have been developed in which a webbing retractor is installed on the vehicle ceiling and the webbing is pulled out from a panel opening via a guide. The direction of the webbing can be changed slightly at the panel opening, but because the angle is gentle, the friction between the webbing and the opening is reduced. On the other hand, the above-mentioned guide position constitutes the upper anchor point of the webbing, and the further this anchor point is placed toward the rear of the vehicle, the better the webbing can be attached to the occupant. However, if the anchor point is placed at the rear, it not only becomes difficult for the front seat occupant to pull out the webbing, but also has the disadvantage that it obstructs the rear seat occupant from getting on and off the vehicle. There have been examples in which a belt reacher has been installed in order to allow the anchor point to be adjusted slightly and to make it easier for the occupant to pull out the webbing, but this only partially solves the above-mentioned drawbacks. The present invention was devised in view of the above circumstances, and its purpose is to provide a webbing guide mechanism that allows the upper anchor point of the webbing to be adjusted as necessary and that does not impede the ability of rear seat passengers to get on and off the webbing. There is a particular thing. [Means for Solving the Problem] In order to achieve the above object, the webbing guide mechanism according to the present invention is a webbing guide mechanism that guides the webbing pulled out from the webbing retractor housed on the ceiling side to the inside of the vehicle. an inner panel that is fixed to the ceiling to accommodate a webbing retractor and has an elongated opening extending in the longitudinal direction of the vehicle; and an inner panel that is movable along the length of the opening and that closes the opening. a guide plate provided with a through hole for guiding the webbing pulled out from the webbing retractor to the interior of the vehicle; a motor for moving the guide plate; and a motor for moving the guide plate when the webbing is attached. and control means for sending a signal to the motor to move the guide plate toward the rear of the vehicle and to move the guide plate toward the front of the vehicle when the rear seat door is opened. [Function] In the present invention, a through hole is formed in the guide plate to guide the webbing toward the interior of the vehicle, and the guide plate is moved toward the rear of the vehicle when the webbing is attached, and moved toward the front of the vehicle when the rear seat door is opened. The through hole acts as the upper anchor point of the webbing and is repositioned together with the guide plate. Therefore, when the front seat occupant is wearing the webbing, the webbing is in close contact with the occupant and a good wearing condition can be obtained, and when the rear seat occupant is getting on and off, the webbing can be carried out without any trouble. In addition, since the guide plate closes the opening formed in the inner panel, the part of the webbing between the guide plate and the webbing take-up device is stored inside the inner panel and is not exposed inside the vehicle. The appearance is improved, and problems such as the occupant getting caught in the webbing do not occur. [Example] FIG. 1 is a side view of a seat belt device to which a webbing guide mechanism according to the present invention is applied. This seat belt device is configured so that an occupant 14 seated on a seat 12 is fitted with a three-point seat belt using a webbing 16. One end of the webbing 16 is wound onto a winding device 10 installed inside a roof side inner panel 18, and the other end is folded back at a tongue plate 20 and then wound around an anchor plate 24 installed below a side wall 22 of the vehicle body. is connected to. The tongue plate 20 can be engaged with a buckle device 28 that is erected from a tunnel portion 26 located approximately at the center of the vehicle. Therefore, the occupant 14 is seated on the seat 12.
After sitting on the seat, the tongue plate 20 is folded into the buckling device 2.
8, the webbing portion between the tongue plate 20 and the anchor plate 24 is installed as a lap webbing, and the webbing portion between the tongue plate 20 and the take-up device 10 is installed as a shoulder webbing. 2 and 3 show the webbing guide mechanism of this embodiment. An elongated opening 30 extending in the longitudinal direction of the vehicle is formed in the roof side inner panel 18, and a pair of guide rails 32 are integrally fixed to both edges of the opening 30. An elongated guide plate 34 is fitted between both guide rails 32 so as to close the opening 30, and is movable along the guide rail 32, as also shown in FIG. A pair of legs 36 are provided on the upper surface of the guide plate 34.
protrudes, and both ends of the shaft 40 inserted into the guide roller 38 are fixed between both legs 36. A constriction 40A is formed at the end of the shaft 40, and a nut 42 for preventing the shaft from coming off is fitted into the constriction 40A. Therefore, the guide roller 38 can freely rotate relative to the shaft 40. Further, a through hole 44 for inserting webbing is formed in the guide plate 34 diagonally rearward of the guide roller. Furthermore, one rack 46 is fixed to one side of the guide plate 34 along the longitudinal direction, and a pinion 48 is engaged with the rack 46. The pinion 48 is fixed to the shaft 52 of the worm wheel 50,
The worm wheel 50 is pivotally supported by a support 54. A worm 58 supported by a bracket 56 engages with the worm wheel 50 in a perpendicular state, and the worm 58 is connected to the output shaft 62 of the motor 60.
is connected to. Therefore, when the motor 60 operates, the power is transmitted to the worm 58, the worm wheel 50, and the pinion 48.
transmitted to the rack 46 and the guide plate 34.
will move along the guide rail 32. In this embodiment, since the motor 60 can be rotated in forward and reverse directions, the guide plate 34 can be reciprocated by switching the direction of rotation of the motor. A winding device 10 for the webbing 16 is arranged behind the guide plate 34 (on the right side in FIG. 2).
A frame 64 of the winding device 10 is attached to the roof side outer panel by bolts 66 via a birth plate (not shown). A winding shaft 68 is pivotally supported between the leg plates of the frame 64, and one end of the webbing 16 is wound onto the winding shaft 68 by the biasing force of a mainspring spring or the like. Further, the winding device 10 has an inertia lock mechanism built in, and in the event of a vehicle emergency, an inertia weight 70 (Fig. 2) operates a pawl (not shown), and the pawl engages a ratchet wheel 72 (Fig. 3). This prevents the webbing 16 from being pulled out. The webbing 16 pulled out from the take-up shaft 68 is
After being wrapped around the guide roller 38 on the guide plate 34, it passes through the through hole 44 and extends into the vehicle. The guide plate 34 therefore acts as an upper anchor point for the webbing 16. Micro switches 74 and 76 are installed at the front and rear ends of the opening 30 formed in the roof side inner panel 18 and the guide rail 32, respectively.
Each microswitch 74, 76 detects the front end position and rear end position of the guide plate 34, and sends an on/off signal to the motor 60 through the control circuit. FIG. 5 shows a control circuit 77 for the motor 60, in which the motor 60 is controlled by a combination of switches and relays arranged in parallel.
control. door switch 78
is a normally open contact provided in a part of the rear seat door, and turns on only when the door is opened, and when the relay coil 80 is energized, the contact 82 is opened and the contact 84 is closed. The buckle switch 86 is a normally open contact located within the buckle device 28 (see FIG. 1) and is turned on when the passenger engages the tongue plate 20 with the buckle device 28. When buckle switch 86 is turned on, relay coil 88 is energized and contacts 90 are closed.
Contact 91 is opened. The micro switch 76 is a normally closed contact and turns off only when the guide plate 34 moves rearward. Therefore, it is normally in the on state, and the contact 90
When the relay coil 92 is closed, the relay coil 92 is energized, and the contacts 94 and switches 96 and 98 of the motor drive circuit are interlocked. At this time, the motor 60 has an arrow A in FIG.
A current flows in the direction to move the guide plate 34 backward. The micro switch 74 is also a normally open contact and turns off only when the guide plate 34 moves forward and comes into contact with it. Therefore, the micro switch 74 is normally in the on state, and when the door switch 78 is turned on, the contact 84 is closed, and the excitation current flows through the relay coil 100, causing the contact 102 to hear. Therefore, a current flows through the motor 60 in the direction of arrow B in FIG.
This will move the guide plate 34 forward. The webbing guide mechanism of this embodiment configured as described above operates as follows. First, the driver sits on the seat and webbing 1.
6, the guide plate 34 and guide roller 38 are in the front position, that is, the position shown in FIG. Therefore, the driver can easily pull out the webbing 16 by extending his hand while sitting. At this time, the motor drive circuit (Fig. 5)
Since the contacts 94 and 102 are open, the motor 60 remains stopped. Next, when the occupant engages the tongue plate 20 with the buckle device 28, the buckle switch 86 is turned on and the relay coil 88 closes the contact 90. Subsequently, the relay coil 92 closes the contact 94 and connects the switches 96 and 98 to the terminal A side. Therefore, a current flows through the motor 60 in the direction of arrow A in FIG. 5, and moves the guide plate 34 backward (in the direction of A in FIG. 2). When the rear end of the guide plate 34 comes into contact with the micro switch 76, the excitation current of the relay coil 92 is cut off, so the contact 94 is turned off and the motor 60 is stopped. Therefore, when the passenger wears the webbing,
The upper anchor point of the webbing 16 moves rearward, improving the closeness of the webbing 16 and ensuring a correct wearing posture. If you are in an emergency situation while driving,
The safety of the occupant is ensured by detecting acceleration by the inertial weight 70 of the retracting device 10 and activating the lock mechanism to stop pulling out the webbing 16. On the other hand, when not only the driver but also a passenger is in the rear seat, when the passenger opens the rear seat door, the upper anchor point of the webbing 16 temporarily moves forward. That is, when the door switch 78 is turned on by opening the door, the relay coil 80 opens the contact 82 and closes the contact 84. Therefore, the excitation current of the relay coil 92 is cut off, the contacts 94 are opened, and the switches 96,
98 returns to the terminal B side. Furthermore, since the excitation current flows through the relay coil 100 due to the closure of the contact 84, the contact 102 is closed. As a result, the motor 60
A current flows in the direction of arrow B in FIG. 5, causing the guide plate 34 and guide roller 38 to move forward. When the front end of the guide plate 34 comes into contact with the micro switch 74 after movement, the motor 60
stops. Since the above-mentioned operation is performed in a short time, the webbing 16 does not become an obstacle when the passenger gets into the rear seat. When the occupant sits in the rear seat and closes the door, the guide plate 34 moves rearward again. When a rear seat passenger exits the vehicle, the guide plate 34 is moved forward when the door is opened, and the operating order is exactly the same as when the passenger gets in the vehicle. When the vehicle finishes driving and the driver releases the webbing, that is, pulls out the tongue plate 20 from the buckle device 28, the buckle switch 86 is turned off. As a result, contact 90 is opened, but contact 91 is closed, so that relay coil 100 and contact 101 are activated and motor current flows in the direction of arrow B in FIG. Therefore, the guide plate 34 moves forward and stops at a position where the driver can easily take it out at any time. Even if a rear seat occupant gets on the vehicle before the driver has attached the webbing, if the occupant opens the door, the motor 60 can move the guide plate 34 forward using the control circuit shown in FIG. The table below shows the cases in which the above-mentioned motor 60 operates.

[Effect of idea]

As explained above, in this invention, when the webbing is attached, the guide plate is moved to the rear of the vehicle, and when the rear seat door is opened, the guide plate is moved to the front of the vehicle, so that rear seat passengers can get in and out of the vehicle without any hindrance. In addition, since the guide plate closes the opening formed in the inner plate, it looks good and has excellent effects in that there are no problems such as the passenger getting caught in the webbing.

[Brief explanation of the drawing]

Fig. 1 is a side view of a seat belt device to which the webbing guide mechanism according to the present invention is applied, Fig. 2 is a vertical side view of the webbing guide mechanism, Fig. 3 is an exploded perspective view thereof, and Fig. 4 is a guide plate and a side view of the webbing guide mechanism. FIG. 5 is a cross-sectional view showing the fitted state of the guide rail, and FIG. 5 is a control circuit diagram of the motor. 10... Winding device, 16... Webbing, 18
... Roof side inner panel, 34 ... Guide plate, 38 ... Guide roller, 46 ... Rack, 48 ... Pinion, 60 ... Motor, 74,
76...Micro switch, 77...Control circuit,
78...door switch, 86...buckle switch.

Claims (1)

[Scope of utility model registration request] A webbing guide mechanism that guides webbing pulled out from a webbing take-up device stored on the ceiling side to the inside of the vehicle interior, and is fixed to the ceiling side so as to accommodate the webbing take-up device and is elongated and extends in the longitudinal direction of the vehicle. an inner panel in which an opening is formed; a through hole that is movable along the length of the opening, is provided to close the opening, and guides the webbing pulled out from the webbing take-up device to the inside of the vehicle interior; A guide plate having a hole formed therein, a motor for moving the guide plate, and a signal sent to the motor to move the guide plate toward the rear of the vehicle when the webbing is attached, and to move the guide plate toward the front of the vehicle when the rear seat door is opened. a webbing guide mechanism having a control means;