JPS61155039A - Sheet belt device - Google Patents

Abstract

PURPOSE:To prevent strong force to be loaded to the mounting portion of a webbing by locking the webbing with a through plate when tension more than a predetermined level is loaded between the webbing and a line-shaped reinforcement. CONSTITUTION:In a normal operation wherein a retractor 16 is not locked, strong force is not loaded between a webbing 8 and a line-shaped reinforcement 15. Therefore, since the axis 14'c of a through plate 14 is pulled by means of a spring 14'b and roller 14'a is rotatable, the webbing 8 is slidable with respect to the through plate 14'. On one hand, when large acceleration is applied to a vehicle body in case of collision or the like, the retractor 16 comes in locked state and the reinfocement 15 cannot be pulled out from the retractor 16. When the movement of the through plate 14' is stopped and strong force is loaded between the webbing 8 and the reinfocement 15, the spring 14'b extends and the webbing 8 is sandwiched between the roller 14'a and the through plate body 14'a.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a seatbelt storage structure of a seatbelt device for restraining and pulling an occupant.

(Prior Art) As a conventional seat belt device, the one shown in FIG. 6 has been proposed (Utility Model Application Publication No. 51-7F1319). That is, the end of the waving 8 is wound around the winding shaft of the retractor 16. This retractor 16 is equipped with an emergency locking device, and is supported on the vehicle body by a share bin 8 inserted into an elongated hole (not shown), and a withdrawal prevention device 4 is fixed near the retractor 16. The pull-out prevention device 4 includes a brake roller 5 that is in sliding contact with the waving 8, and a brake arm 6 that is disposed opposite to the brake roller 5. The end portion 6a of the brake arm 6 is urged toward the brake roller 5 by a spring 7, and the brake arm 6 is biased toward the brake roller 5 by a spring 7.
) is in contact with the support member 2 protruding from the tractor 16. When a shock of a predetermined value or more is generated on the vehicle body, the locking mechanism of the retractor 16 is activated to prevent rotation of the winding shaft. Therefore, the load generated on the waving that restrains the occupant's body is transmitted to the retractor 16. When the load applied to this belt exceeds a predetermined value, the share bin 8
is broken, and the retractor 2 moves in the direction of the pull-out prevention device 4 as shown in FIG. 6 iBl.

As a result, the braking arm 6 climbs over the support member 2, rotates, and clamps the waving 8 between it and the braking roller 5 to perform braking. Therefore, even if the waving 8 remains on the winding shaft of the retractor 2, the waving 8 wound around the retractor 16 is tightened after the emergency lock is activated, and the slack inside the retractor 16 is pulled out. It is possible to suppress "tightness of winding".

However, this seat belt device has a structure that prevents the belt from running idle due to "tightening" by pinching the waving 8 between the brake arm 6 and the roller 5 by breaking the shear pin 8 that fixes the tractor 16. As a result, the retractor lacks stability due to plastic phenomena such as breakage, is difficult to design, cannot be reused, and has the problem of increasing the size of the retractor.

As a device for solving these problems, the applicant previously proposed an arrangement as shown in FIG. In FIG. 7, one end of the waving 8 is fixed through an upper anchor plate 11 to a mounting hole 17 in the upper part of the center pillar 10 together with a through anchor 12 by an anchor bolt 18. The other end of the waving 8 is fixed to the mounting hole 18 of the sill 28 with an anchor bolt 20 via a lower anchor plate 19 together with an ELR type retractor 6 equipped with an emergency locking device. The through plate 14 and the upper anchor plate 11 are located in the middle of the through anchor 12 and are movably attached to the waving 8. This through plate 14
A linear strength member 15 is attached to the ELR type retractor 6, and this strength member 15 is wound around the ELR type retractor 6.

In this seat belt device, when the ELR type retractor 6 is locked in the event of a collision, the strength member 15 is linear,
Since the winding can be horizontally wound on the winding drum of the retractor 16, there is almost no winding tightening, so there is no need to provide a locking mechanism to prevent the winding from tightening, and the above-mentioned problems in the conventional example are almost solved. .

(Problem to be Solved by the Invention) However, in this seat belt device, when a load F (1191) is applied to the webbing 8 as shown in FIG. The strength member is pulled with a force of 2F (kg+), and this force acts on the attachment parts of the anchor bolts 13 and the like, so there is a problem in that the anchor bolts 18 and the vehicle body must be reinforced.

(Means for solving the 8m point) The purpose of the present invention is to obtain a seat belt device that solves the problems in conventional seat belt devices, and in order to achieve this purpose, the seat belt device of the present invention is provided. a waving whose one end is fixed to the vehicle body, and an upper anchor plate which fixes the other end of the waving to the vehicle body;
A through anchor fixed to the vehicle body and through which the waving is slidably inserted; a retractor with an emergency locking device fixed to the vehicle body; a linear strength member that can be wound around the retractor; the upper anchor plate and the through anchor; The waving is slidably inserted between the waving and one end of the linear strength member is held, and when a tension of a predetermined value or more is applied between the waving and the linear strength member, the waving It is characterized by comprising a through plate adapted to be locked.

(Function) According to this configuration, when a tension of a predetermined value or more is applied between the waving and the linear strength member, the through 7' L
/ -) When the sea lion plate is locked, no load acts on the waving on the side of the sea lion anchor plate, and the tension applied to the waving becomes the same as the tension applied to the linear strength member, which makes it difficult to install the sea lion plate and the through anchor. Only the same load as the tension applied to the waving will act on the part.

(Example) The seat belt device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. In Figure 1, the webbing 8 - one end of which is connected to the upper sea lion plate 1.
1, and is fixed together with a through anchor 12 to a mounting hole 17 in the upper part of the center pillar IO by an anchor bolt 13. The other end of the waving 8 is fixed to the mounting hole 18 of the sill 28 by an anchor bolt 20 together with an ELR type retractor 6 equipped with an emergency locking device via a lower anchor plate 19. A through plate 14' with a locking mechanism is located between the upper anchor plate 11 and the through anchor 12, and is movably attached to the waving 8. This through plate 14' has a linear strength member 15.
is installed, and this strength member 15 is an ELR type IJ)
It is wound around rafter 16. As shown in FIGS. 2 to 4, the through plate 14' includes a through plate main body 14''a, a shaft 14'C urged downward by a spring 14'b, and a roller 14' rotatably attached to the shaft 14'C. It has a.

Next, the effect will be explained. In the normal state where the retractor 16 is not locked, no large force acts between the waving 8 and the linear strength member 15. Since the roller 14'a is in a state of being pulled downward by 'b' and is rotatable, the waving 8 can freely slide on the through plate 14'. Therefore, by moving the through plate 14' up and down, it is possible to store and draw out the waving.

On the other hand, if large acceleration is applied to the vehicle body, such as in a collision, EL
When the R-type retractor 16 is locked, the rotation of the internal winding shaft is restricted, and the linear strength member 15 cannot be pulled out from the retractor 16. As a result, when the movement of the through plate 14' is stopped, a large force acts between the waving 8 and the linear strength member 15 due to the inertia of the occupant. Then the fourth
As shown in the figure, since the spring 14'b extends, the waving 8 also extends to the through plate body 14.
'a.

In such a state, as shown in Fig. 5, no load will be applied to the waving 8 on the anchor plate 11 side, and therefore, only the same load F as the tension F applied to the waving 8 will be applied to the anchor bolt, etc. on the vehicle body side. .

Therefore, there is no need to reinforce the attachment portion of the anchor bolt 18.

(Effects) As described in detail above, the seat belt device of the present invention arranges the waving by folding it back along the center villa, inserting the waving at the folding point, and winding it around the rafter with an emergency locking device attached to the vehicle body. The configuration includes a through plate that holds one end of the linear strength member and locks the waving when a predetermined tension or more is applied between the waving and the linear strength member. This makes it possible to prevent a large force from being applied to the attachment portion of the waving to the upper part of a heavy body while taking advantage of the winding prevention effect, which is an advantage of a seat belt device that is wound around an emergency lock device.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the configuration of an embodiment of the seat belt device of the present invention, Fig. 2 is an enlarged perspective view of the through plate with a locking mechanism shown in Fig. 1, and Fig. 8 is a through plate with a locking mechanism. A-AM sectional view of FIG. 2 showing the unlocked state, and FIG. 4 shows the locking mechanism through plate in the locked state.
Figure 5 is a side view showing the action of the seat belt device shown in Figure 1, Figure 6 is a side view showing the action of the seat belt device shown in Figure 1. Figure 7 is a perspective view showing the JR configuration of the seatbelt device that can prevent belt tightening, which was previously proposed by the applicant, and Figure 8 is a side view showing the operation of the device shown in Figure 7. 8... Waving 10... Center pillar 11
... Upper anchor plate 12 ... Through anchor 13 ... Anchor bolt 14
...Through plate 14'...Through plate with lock mechanism 14'a...
・Through plate body 14'b...Spring 14'C...Shaft 14
'd... Roller 15... Linear strength member 16... Retractor 17, 18... Mounting hole 19.
... Lower anchor plate 20 ... Anchor bolt 21 ... Tongue plate 22 ... Buckle Patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 0A2 (21A-A*m) Figure 5 Figure 7 Figure 8 F

Claims (1)

[Claims] 1. A waving whose one end is fixed to the vehicle body, an anchor plate which fixes the other end of the waving to the vehicle body, a through anchor which is fixed to the vehicle body and allows the waving to be slidably inserted, and an emergency anchor fixed to the vehicle body. A retractor with a locking device, a linear strength member that can be wound around the retractor, and the waving is slidably inserted between the upper anchor plate and the through anchor, and one end of the linear strength member is held. A seat belt device comprising: a through plate configured to lock the waving when a tension of a predetermined value or more is applied between the waving and the linear strength member.