JPH02106455A - Seat belt device - Google Patents

Abstract

PURPOSE:To permit a driver to be surely restrained by installing a pretension mechanism for arbitrarily controlling the pulling-out quantity of a webbing and a webbing folding mechanism operated by sensing a shock. CONSTITUTION:In the mounting of a webbing 2, if the solenoid 4c of a pretension mechanism 4 is demagnetized when the webbing 2 is pulled out by a necessary quantity, brake arm 4b operates to a rubber sheet 4a side, and is press- attached onto the webbing 2, and pulling-out is suppressed. If a large impact is applied in this state, a taking-up mechanism 1 pulls out the webbing 2, and then the taking-up operation is suspended, and at the same time, the solenoid 5 of a webbing folding mechanism 5c is energized. Then, a rod 5n moves upwardly, and a hook 5b is demounted from a hooking pin 5g, and a turning arm 5a is turned in the counterclockwise direction by a return spring 5a until a hooking piece 5i is fitted into a cut part 6a formed on a base 6. Therefore, the webbing 2 is folded in the lengthwise direction.

Description

[Detailed description of the invention] [Purpose of the invention]

(Industrial Application Field) The present invention relates to a seat belt device used to restrain an occupant to a seat using webbing. (Prior art) Conventionally, the above-mentioned seatbelt device was developed in the Showa 5
Published on May 31, 2008 New edition Automotive engineering column Volume 7
Equipment There is one disclosed in Section 15, Section 3, and FIG. 4 shows a schematic diagram of the seat belt device described in the above-mentioned document. That is, the seat belt device shown in the figure is a three-point seat belt device, and is provided with a winding mechanism 100 fixed to the lower part of the center pillar (vehicle body side) B1 on the outer side of the seat S. One end of the webbing 101 is attached to the take-up mechanism 10G so that it can be taken up, and the other end of the webbing 101 pulled out from the take-up mechanism 100 is attached to a relay anchor Al fixed to the upper part of the center pillar B1 on the outer side of the sheet S. At the same time, an insertion tongue T slidably inserted through the webbing 101 is attached to an anchor A2 fixed to the floor (vehicle body side) B2 on the center side of the seat S. Furthermore, a buckle B for attaching and releasing the insertion tongue T is attached to the floor B2 on the center side of the seat S. Then, this winding mechanism 100 is set in a free state after pulling out the webbing 101. The webbing 101 is automatically wound up and, for example, when a large impact is detected,
The pulling out and winding of the webbing 101 is stopped and locked at the amount of pulling out (for example, ELR). Here, the winding force with which the winding mechanism 100 automatically winds up the webbing 101 is set to be so small that the occupant does not feel pressure when hanging the webbing 101. Therefore, after the crew member sat on the seat, webbing 101
The passenger is restrained to the seat S by pulling out the belt from the winding mechanism 100, hanging it diagonally from the shoulder to the chest of the passenger, holding the waist, and attaching the insertion tongue T to the buckle B. For example, when a large impact occurs, the first winding mechanism 100 stops pulling out and winding up the webbing 101 to keep the occupant restrained in the seat S. (Problems to be Solved by the Invention) However, in the conventional seat belt device described above, the force for winding up the webbing 101 by the winding mechanism 100 is small so that the occupant does not feel pressured.
When a passenger moves while seated in Seat S,
The webbing 101 is also adapted to the winding mechanism 10 in response to the movement of the occupant.
It is drawn from 0. For example, when the webbing 101 is pulled out more than the amount that can restrain the occupant to the sea seat S, when the webbing 101 stops being pulled out and taken up from the winding mechanism 100 due to an impact or the like, the webbing 101 Since the webbing 101 was pulled out more than the predetermined amount and remained loose, there was a problem that the occupant could not be restrained in the S, and even if the webbing 101 was pulled out more than the predetermined amount, there was a shock etc. There is a problem in that it is sometimes desirable to be able to restrain the occupant in the seat S. (Purpose of the Invention) This invention was made in view of the above-mentioned conventional problems, and even if the webbing is pulled out more than a predetermined amount, it is possible to reliably restrain the occupant in the seat in the event of an impact, etc. The purpose of this product is to provide a seat belt device, and its structure is highly ingenious.

[Structure of the invention]

(Means for Solving the Problems) A seat belt device according to the present invention includes a webbing whose one end side is attached to a retracting mechanism so as to be retractable, and whose other end side is pulled out from the retracting mechanism and attached to the vehicle body. In seatbelt devices. A webbing detecting means for detecting the amount of the webbing being pulled out is provided near the winding mechanism, and a pretensioning mechanism is provided for arbitrarily restraining the amount of the webbing being pulled out, and further, the webbing detecting means causes the webbing to be pulled out by a predetermined amount. A webbing folding mechanism operates by sensing an impact while detecting that the webbing has been pulled out by a larger amount to fold the webbing in its length direction, thereby creating the same state as if the webbing had been pulled out by a smaller amount. The present invention is characterized by having a configuration in which a seatbelt device is provided with such a configuration as a means for solving the above-mentioned conventional problems. (Function) According to the seat belt device according to the present invention, the webbing is provided with an end side attached to the retracting mechanism so as to be retractable, and the other end side is pulled out from the retracting mechanism and attached to the vehicle body side, and the webbing is pulled out from the webbing. amount is detected by the webbing detection means, the webbing is stopped by a pretension mechanism at an arbitrary amount of withdrawal, and while the webbing detection means detects that the webbing is pulled out by more than a predetermined amount. , the webbing folding mechanism operates upon sensing the impact and folds the webbing in its length direction, so that the webbing is pulled out by a smaller amount than the predetermined amount. In the event of an impact, etc., the actual amount of webbing to be pulled out is adjusted to the extent that the occupant is restrained by the seat. (Example) Hereinafter, a first example of the seat belt device according to the present invention will be described.
This will be explained based on the drawings to FIG. That is, in the seat belt device shown in the figure, the symbol 1
is winding machine a (FER), code 2 is webbing,
One end of the webbing 2 is attached to the winding mechanism 1 so that it can be wound up, and the other end (not shown) is attached to the upper part of the center pillar Bl on the outer side of the sheet S in the same manner as shown in FIG. The insertion tongue T supported by the fixed relay anchor A1 and slidably inserted is attached to the anchor A2 fixed to the floor B2 on the center side of the seat S. Moreover, the code 3 is the webbing 2
a webbing detection means for detecting the amount of pullout of the webbing 2; numeral 4 indicates a pretension mechanism for arbitrarily restricting the amount of the webbing 2 being pulled out; numeral 5 indicates that the webbing 2 has been pulled out by the webbing detection means 3 by more than a predetermined amount; This is a webbing folding mechanism that is activated by sensing an impact while detecting the webbing 2 and brings the webbing 2 into the same state as if the amount of pullout of the webbing 2 was reduced. The webbing detection means 3 is a reed switch, and includes a switch section 3b that turns on and off when a detection section (magnet) 3a attached to a predetermined position of the webbing 2 approaches or separates. It is provided with an external connection connector 3C for outputting a signal to the outside. The webbing detection means 3 is fixed near the upper end of a vertically elongated base 6 in FIG. The detection signal is output to the outside via the external connection connector 3C. On the other hand, the pretension mechanism 4 arbitrarily restricts the amount of the webbing 2 being pulled out from the winding mechanism 1 or wound up by the winding mechanism 1. This pretension mechanism 4 includes a rubber sheet 4a that slides into contact with the webbing 2 on the right side in FIG. 1, and a braking arm 4b that presses against and separates from the webbing 2 on the left side in FIG. 1 corresponding to the rubber sheet 4a. For example, an electromagnetic solenoid 4C that demagnetizes the excitation m by switching a reset switch (not shown) provided on the driver's seat and operates the braking arm 4b to separate and press the webbing 2, and a predetermined electromagnetic solenoid 4C that It is provided with an external 1 connection connector 4d for supplying power. The pretension mechanism 4 is fixed at a substantially intermediate position of the base 6 during the first IA, and by switching the reset switch, the electromagnetic solenoid 4
C is excited and demagnetized to operate the brake arm 4b, and when the electromagnetic solenoid 4c is excited, the brake arm 4b separates from the webbing 2 to make the webbing 2 free, and when the electromagnetic solenoid 4C is demagnetized. The braking arm 4b presses against the webbing 2 and arbitrarily stops the amount of the webbing 2 to be pulled out. On the other hand, the webbing folding mechanism 5 is actuated by sensing an impact when the webbing detection means 3 detects that the webbing 2 has been pulled out more than a predetermined amount, and folds the webbing 2 to its length. The webbing 2 is folded in the same direction as if the amount of the webbing 2 to be pulled out was reduced. This webbing folding mechanism 5 includes a rotating arm 5a rotatably provided on a base 6, a hook 5b that locks and unlocks the rotating arm 5a, and an electromagnetic solenoid 5C that operates the hook 5b. There is. The rotating arm 5a has a base 6 on the lower side in FIG.
The return spring 5e is rotatably attached to a pivot shaft 5d fixed to the pivot shaft 5d, and the other end of the return spring 5e, which has one end attached to the pivot shaft 5d, is hooked. The webbing 2 is biased in the direction, and the pivot shaft 5d has the webbing 2
The roller 5f that hangs is rotatably attached. Further, a roller 5h is attached to the rotating arm 5a, which is spaced apart from the roller 5f on the upper side in FIG. 1 and rotatably hangs the webbing 2 on the lock pin 5g. There is provided a locking piece 5j that locks the rotating arm 5a by fitting into a notch 6a provided in the base 6 when the rotating arm 5a is rotated counterclockwise. As shown in FIG. 3, the hook 5b is rotatably attached to a support shaft 5j fixed to the base 6, and the other end is hooked to the return spring 5, which has one end attached to the support shaft 5j. The roller 5m is stopped and is energized counterclockwise in FIG.
It is installed so that it can rotate freely. The hook 5b is also provided with an opening 5p on the left side in FIG. 1 for attaching a rod 5n connected to an electromagnetic solenoid 5C, which will be described later. The electromagnetic solenoid 5C is supplied with a predetermined power when the impact sensing means (not shown) senses an impact while the webbing detection means 3 detects that the webbing 2 is pulled out more than a predetermined amount. A rod 5n which is designed to be energized and which operates upward and downward in the figure when the electromagnetic solenoid 5C is energized and demagnetized;
The electromagnetic solenoid 5C is provided with an external connection connector 5q for supplying a predetermined power source. Then, the rod 5n is inserted into the opening 5P provided in the hook 5b.
When the electromagnetic solenoid 5C is energized and demagnetized, the hook 5b is rotated clockwise and counterclockwise in FIG. That is, the force [Fl] by which the pretension mechanism 4 restrains the webbing 2 and the rotation 7-m 5a of the webbing folding mechanism 5 rotate counterclockwise in FIG. 1 with the webbing 2 hanging. Move to fold webbing 2 [F2
] and the force with which the winding mechanism 1 winds up the webbing 2 [F3
] What is the relationship with? [F3] < [Ft] < [F2]. Here, as shown in FIG. 1, the other end of the webbing 2 pulled out from the first winding mechanism 1 is hung on one roller 5f attached to the rotating arm 5a of the webbing folding mechanism 5, and then Rotating arm 5a crosses from 5f
It is hooked to the other roller 5h attached to the hook 5h, and then hooked to the roller 5m attached to the hook 5b by crossing it from the roller 5h. Furthermore, after passing it between the rubber seam 4a of the pretension mechanism 4 and the brake arm 4a, it is attached to the vehicle body through the webbing detection means 3 in the same manner as shown in FIG. The print tension mechanism 4 also includes an electromagnetic solenoid 4C.
The webbing folding mechanism 5 is connected to a power source through an external connection connector 4d and a reset switch (not shown), and the webbing folding mechanism 5 is connected to a power source through an external connection connector 5q to the electromagnetic solenoid 5C. The hook 5b of the webbing folding mechanism 5 is hooked to the lock pin 5g of the rotating arm 5a, so that the first rotating arm 5a is locked in the non-operating position shown in FIG. Then, after the occupant sits on the seat in the same manner as shown in Figure 4,
The webbing 2 is pulled out from the winding mechanism 1, and the webbing 2 is attached to the vehicle body in the same manner as shown in FIG. 4, and the occupant is restrained on the seat. For example, if the occupant feels pressured by the force with which the winding mechanism 1 winds up the webbing 2, or if the occupant wants to move his body away from the seat so that his hands can reach it, the webbing 2 is pulled out as much as necessary. Now, when the reset switch (not shown) of the pretension mechanism 4 is switched to demagnetize the electromagnetic solenoid 4C, the braking arm 4b operates toward the rubber sheet 4a side, presses against the webbing 2, and stops the webbing 2 by the amount that it is pulled out. Thereby, the webbing detection means 3 detects that the webbing 2 has been pulled out by more than the predetermined amount. In this state, for example, if there is a large impact, the winding mechanism 1 stops pulling out and winding the webbing 2, and at the same time, a predetermined power is supplied to the electromagnetic solenoid 5C of the webbing folding mechanism 5 through a shock sensing means (not shown). When supplied, the electromagnetic solenoid 5C is energized. As a result, as shown in Fig. 2, the electromagnetic solenoid 5C
Since the rod 5n moves upward in the figure, the hook 5b
is removed from the lock bin 5g, and the rotating arm 5a is rotated counterclockwise in the drawing by the return spring 5e until the locking piece 51 is fitted into the notch 6a provided in the base 6. By rotating the rotating arm 5a, the other roller 5
h is separated from the roller 5m attached to the hook 5b, and the winding mechanism 1 stops pulling out and winding up the webbing 2 at one end side, so the webbing 2 is connected to the brake arm 4b of the pretension mechanism 4 and the rubber sheet. 4a, the webbing is folded in the length direction by the webbing folding mechanism 5 to reduce the amount of pullout, that is, from the pretension mechanism 4 side to the webbing folding mechanism 5 side (upper side in Fig. 2). (in the direction of the arrow shown). In other words, by creating the same state as when the amount of webbing 2 pulled out is reduced, the occupant is reliably restrained to the seat and safety is ensured. Although not shown in the drawings, in order to release the seat belt device, use a wrench or the like to remove the latch piece 51 fitted into the notch 6a provided in the base 6, and then release the rotating arm 5.
a can be easily returned to the state shown in FIG.

【Effect of the invention】

As explained above, the seatbelt device according to the present invention includes a seatbelt that includes a webbing that is attached at one end to a winding mechanism so as to be windable, and whose other end is pulled out from the winding mechanism and attached to the vehicle body. In the device. A webbing detecting means for detecting the amount of the webbing pulled out is provided near the winding mechanism, and a pretension mechanism is provided for arbitrarily restraining the amount of the webbing being pulled out, and the webbing detecting means detects when the webbing is pulled out. A webbing folding mechanism operates by sensing an impact while detecting that the webbing has been pulled out more than a fixed amount and folds the webbing in its length direction, thereby making it the same as if the webbing was pulled out by a smaller amount. Even if the webbing is pulled out more than the predetermined amount, if there is an impact, etc., the amount of webbing pulled out is forcibly reduced to ensure that the occupant is seated securely in the seat. It has the excellent effect of being able to be restrained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a seatbelt device according to an embodiment of the present invention when it is not in operation, FIG. 2 is a partially cutaway side view of the seatbelt device shown in FIG. 1 when it is in operation, and FIG. This figure is a schematic diagram of the appearance of the seat belt device shown in FIG. 1 when it is not in operation, and FIG. 4 is an appearance diagram of the conventional seat belt device. DESCRIPTION OF SYMBOLS 1... Winding mechanism, 2... Webbing, 3... Webbing detection means, 4... Pretension mechanism. 5...Webbing folding mechanism.

Claims (1)

[Claims] (1) In a seat belt device including a webbing whose one end is attached to a retracting mechanism so as to be retractable and whose other end is pulled out from the retracting mechanism and attached to the vehicle body, the webbing is disposed near the retracting mechanism. A webbing detection means is provided to detect the amount of the webbing being pulled out, and a pretension mechanism is provided to arbitrarily restrict the amount of the webbing being pulled out, and the webbing detection means detects that the webbing is pulled out by more than a predetermined amount. A seat belt device comprising: a webbing folding mechanism which is activated by sensing an impact to fold the webbing in its length direction while the webbing is being pulled out, thereby reducing the amount of the webbing pulled out. .