JPH06344865A - Structure to mount retractor device with pretensioner mechanism - Google Patents

Abstract

PURPOSE:To provide structure of mount a retractor device with a pretensioner mechanism capable of reducing the longitudinal width of a center pillar. CONSTITUTION:Since a cylinder 24 is tilted to the side of the longitudinal center line S of a retractor body 9, and the front edge or rear edge of a center pillar 26 and the cylinder 24 become hard to interfere with each other, a front edge 27a or rear edge on the side corresponding to the cylinder 24 of the center pillar 26 can be positioned near the longitudinal center line S, and the longitudinal width P2 of the center pillar 26 can be reduced. Since a guide cylinder 25 formed bent downward for insertion of wires is provided in the lower end part of the cylinder 24, a wire 18 can be smoothly pulled up even when the cylinder 24 is tilted. Therefore, the performance of a pretensioner mechanism itself is surely maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a retractor device with a pretensioner mechanism.

[0002]

2. Description of the Related Art As a conventional mounting structure for a retractor device with a pretensioner mechanism, for example, ones shown in FIGS.
-240405).

Reference numeral 1 is a center pillar, and a pillar garnish 2 is provided inside the vehicle interior. This center pillar 1
Has a front door 3 on the front side and a rear door 4 on the rear side
Is provided. The lower portion 5 of the center pillar 1 has a shape that expands downward, and a retractor device 6 is installed in the lower portion 5.

The main part of the retractor device 6 is a retractor body 9 which is attached to the center pillar 1 and has a bobbin 8 for winding the seat belt webbing 7 therein. The webbing 7 pulled out from the bobbin 8 of the retractor body 9 is taken out from the slit 10 in the upper portion of the pillar garnish 2 to the inside of the vehicle compartment, and again through the through ring 11 in the upper portion of the center pillar 1, the lower slit 12 again.
Enter the pillar garnish 2 from the floor panel 13
It is connected to the anchor portion 14 provided in the. A tongue 15 is passed through the webbing 7. The webbing 7 is pulled out and the tongue 15 is engaged with a buckle (not shown) on the seat side to restrain the occupant on the seat with the webbing 7. be able to.

The retractor device 6 is equipped with a pretensioner mechanism. That is, when a sudden load is applied to the occupant on the seat, such as during a vehicle collision, the webbing 7 can be instantly wound up by a fixed amount to enhance the restraint of the occupant. . As a mechanism therefor, a bobbin 8 for winding the webbing 7 is integrally provided with a pulley 16, and a wire 18 is wound around the pulley 16. On the other hand, an upward cylinder 17 is vertically formed at a corner portion on the vehicle interior side at the upper front end of the retractor body 9, and a piston 19 movable upward is housed in the cylinder 17. A gas generator 20 for generating a gas for pushing the piston 19 upward is provided at a lower part of 17
Are formed. The end of the wire 18 is inserted through the hole 21 at the lower end of the cylinder 17 and connected to the internal piston 19.

With such a structure, if a vehicle should collide, a sensor installed on the vehicle body detects the collision and sends a signal to the gas generator 20. When the gas generating unit 20 receives a signal, the gas generating agent inside explodes, and nitrogen gas is instantaneously pumped to the lower side of the cylinder 17 and pushes the piston 19 upward. Then, the wire 18 is pulled upward, and the bobbin 8 rotates in the direction of winding the webbing 7. Then, when the bobbin 8 rotates and a certain amount of the webbing 7 is wound up, the webbing 7 is locked by a known locking mechanism provided in the retractor body 9, and the withdrawal of the webbing 7 is restricted. ing.

[0007]

As described above, in order to pull up the wire 18 right above and rotate the pulley 16 efficiently, the cylinder 17 must be provided on the upper portion of the retractor body 9 in a vertical state. However, when the retractor device 6 in which the cylinder 17 is vertically erected is housed in the lower portion 5 of the center pillar 1, the cylinder 1
Since the upper end 17a of 7 reaches the general portion 22 of the center pillar 1, the front-rear width P ₁ of the general portion 22 of the center pillar ₁
Must be increased. As described above, when the front-rear width P ₁ of the center pillar 1 is increased, the weight of the vehicle body is increased and the appearance of the vehicle body is deteriorated accordingly. When the cylinder 17 is provided at the front end of the retractor body 9 as in the conventional example, the front edge 22a of the center pillar 1 is moved backward to improve the passenger's getting on / off property. It is not possible to increase the front-rear width D ₁ of the door 3.

The present invention has been made by paying attention to such a conventional technique, and provides a mounting structure of a retractor device with a pretensioner mechanism which can reduce the front-rear width of a center pillar.

[0009]

In the mounting structure for a retractor device with a pretensioner mechanism according to the present invention, the cylinder is tilted toward the front-rear center line of the retractor body and is bent downward at the lower end of the cylinder. A guide tube for inserting a wire is provided.

[0010]

According to the present invention, the cylinder is tilted toward the front-rear center line of the retractor body, and the front edge or the rear edge of the center pillar and the cylinder are less likely to interfere with each other. The front edge or the rear edge on the side can be located closer to the front-rear centerline, and the front-rear width of the center pillar can be reduced. Therefore, it is advantageous in terms of weight and appearance. Also, if the front edge of the center pillar is retracted, the front-rear width of the front door can be expanded, and if the rear edge of the center pillar is located on the front side, the front-rear width of the rear door can be expanded. It is possible to improve the entry / exitability of the door having the wider front-rear width.

Further, a guide tube for inserting a wire bent downward is provided at the lower end of the cylinder so that the wire can be pulled up smoothly even when the cylinder is tilted as described above. Since it can be performed, the performance of the pretensioner mechanism itself is reliably maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the prior art are designated by the same reference numerals, and a duplicate description will be omitted.

The cylinder 2 formed at the upper front end of the retractor body 9 of the retractor device 23 according to this embodiment.
Reference numeral 4 indicates a state in which the retractor body 9 is inclined toward the front-rear centerline S side, that is, the rear side by an angle θ. A piston 19 that rises due to the gas pressure of the gas generating unit 20 is provided in the cylinder 24, and the end of the wire 18 is connected to the piston 19. Since the wire 18 is wound around the pulley 16 on a surface along the vehicle width direction X, the end of the wire 18 wound around the pulley 16 is tilted rearward in the front-rear direction Y to the cylinder 24. Pulling along ensures that the path of the wire 18 bends at the lower end of the cylinder 24. Therefore, in this embodiment, a guide tube 25 having a constant length L bent downward from the lower end of the cylinder 24 is provided at the lower end of the cylinder 24 at which the wire 18 is introduced, and the wire 18 is guided by the guide tube 25. The structure is such that it is inserted into the cylinder 25 and introduced into the cylinder 24. Moreover, the guide tube 25 is bent in a gently curved state so that no load is applied to the wire 18. Therefore, although the path of the wire 18 is bent near the lower end of the cylinder 24, the wire 18 can be pulled up smoothly, and the energy of the piston 19 rising due to the gas pressure is reliably transmitted to the pulley 16. The pulley 16 can be rotated in the winding direction of the webbing 7.

Since the cylinder 24 is tilted to the rear side as described above, the front edge 27a of the general portion 27 of the center pillar 26 in this embodiment is at a position retracted from the conventional one. That is, even if the front edge 27a is retracted in this manner, there is no risk of interfering with the upper end 24a of the cylinder 24. Therefore, the front-rear width P ₂ of the center pillar 26 becomes smaller than in the conventional case, and the weight of this portion can be reduced and the appearance can be improved. In addition, the center pillar 2
Since the front-back width D ₂ of the front door 28 can be increased by the amount by which the front edge 27a of 6 is retracted, the front passenger's occupancy is improved.

In particular, since the front edge 29a of the lower portion 29 of the center pillar 26 is continuously connected to the front edge 27a of the general portion 27, there is no reduction in strength at the boundary between the lower portion 29 and the general portion 27. Further, since the guide tube 25 having the constant length L in which the wire 18 is inserted is provided at the lower end portion of the cylinder 24, the structure in which only the hole for introducing the wire 18 is simply formed at the lower end of the cylinder as in the conventional case. In comparison, it is possible to more reliably prevent the gas from the gas generating unit 20 from escaping downward. Therefore, it is possible to efficiently use the pressure of the gas emitted from the gas generating unit 20.

In the above description, the cylinder 24 is formed at the front end of the retractor body 9 and the cylinder 24 is tilted rearward. However, the cylinder 24 is formed at the rear end of the retractor body 9, and The cylinder 24 may be tilted forward. In that case, the front-rear width of the rear door 4 can be increased, and the occupancy of the rear seat occupants is improved.

[0017]

The mounting structure of the retractor device with the pretensioner mechanism according to the present invention has the contents as described above, and the cylinder is tilted toward the front-rear centerline side of the retractor main body, and the front edge of the center pillar or Since the rear edge and the cylinder are less likely to interfere with each other, the front edge or the rear edge of the center pillar that corresponds to the cylinder can be positioned closer to the front-rear centerline, and the front-rear width of the center pillar can be reduced. be able to. Therefore, it is advantageous in terms of weight and appearance. Also, if the front edge of the center pillar is retracted, the front-rear width of the front door can be expanded, and if the rear edge of the center pillar is located on the front side, the front-rear width of the rear door can be expanded. It is possible to improve the entry / exitability of the door having the wider front-rear width.

Further, a guide tube for inserting a wire bent downward is provided at the lower end of the cylinder so that the wire can be pulled up smoothly even when the cylinder is tilted as described above. Since it can be performed, the performance of the pretensioner mechanism itself is reliably maintained.

[Brief description of drawings]

FIG. 1 is a side view showing a mounting structure of a retractor device with a pretensioner mechanism according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view as seen from the direction of arrow DA in FIG.

FIG. 3 is a perspective view showing a mounting structure of a conventional retractor device with a pretensioner mechanism.

FIG. 4 is a side view showing a mounting structure of a conventional retractor device with a pretensioner mechanism.

5 is a cross-sectional view as seen from the direction indicated by the arrow DB in FIG.

[Explanation of symbols]

7 webbing 8 bobbin 9 retractor body 18 wire 19 the piston 20 under P ₁ of the gas generator 23 retractor 24 cylinder 25 the guide tube 26 center pillar 29 center pillar, P ₂ longitudinal width D ₁ of the center pillar, D ₂ front front and back doors Width θ Cylinder tilt angle S Front-rear centerline X Vehicle width direction Y Front-rear direction

Claims (1)

[Claims] 1. A cylinder is formed upward at a front end or a rear end of a retractor body having a bobbin for winding a webbing therein, and a gas generating portion is provided at a lower portion of the cylinder, and a gas is generated in the cylinder. A retractor with a pretensioner mechanism is attached to the lower part of the center pillar, in which a retractor device with a pretensioner mechanism is provided, which is provided with a piston that moves upward by the gas pressure from the section and is connected with a wire for rotating the bobbin in the winding direction. In the mounting structure of the device, the pretensioner mechanism is characterized in that the cylinder is tilted toward the front-rear centerline side of the retractor body, and a guide tube for inserting a wire bent downward is provided at the lower end of the cylinder. Retractor device mounting structure.