CN105829173B - The seat belt apparatus of vehicle - Google Patents

Abstract

A seat belt pretensioner (20) for pulling in a seat belt (12) is connected to an anchor portion (4) provided on a floor member (6) of the vehicle body when a predetermined or greater impact force acts on the vehicle body.

Description

Vehicle seat belt device

technical field

The present invention relates to a seat belt device for a vehicle including a lap pretensioner, and more particularly, to a mounting structure of the lap pretensioner.

Background technique

The vehicle includes a seat belt arrangement for restraining an occupant seated in the seat. A common seat belt device is a three-point seat belt device for the front seat, wherein a retractor is provided on a pillar member, and the front end of the seat belt drawn from the retractor is fixed to, for example, a seat provided at the lower part of the pillar member. The anchor portion, and the tongue provided at the middle position of the seat belt are inserted and connected to the buckle beside the seat to restrain the passenger's waist with the lap belt part and the passenger's shoulder with the shoulder belt part.

In recent years, in order to further improve safety, it is known to install a device called a seat belt pretensioner between the anchor portion and the front end of the seat belt in the seat belt device.

The seat belt pretensioner is a device that pulls the seat belt in from the front end side when a predetermined impact force is applied to further restrain the occupant seated on the seat. Specifically, a seat belt pretensioner generally includes: a cylinder having a gas generating agent such as gunpowder, an ignition part, and a piston; and a relay part connected to the piston at one end of the cylinder. One end of the cylinder is fixed, and the front end of the relay unit is connected to the front end of the seat belt, so that the displacement of the piston that occurs when the gas is generated in the cylinder is transmitted to the seat belt, and the seat belt is pulled in (Patent Document 1).

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-359028

Contents of the invention

The problem to be solved by the invention

Since the beam member provided at the lower portion of the pillar member has high rigidity, the anchor portion fixing the front end of the seat belt is usually on the beam member, and as pointed out in Patent Document 1, the seat belt pretensioner is also fixed to the beam member .

However, many vehicles, such as pickup trucks including a body structure with a frame at the lower part of the body, do not have a beam member, and in this case, the problem is the fixed position of the seat belt pretensioners.

The present invention has been made to solve such problems, and an object of the present invention is to provide a seat belt device for a vehicle capable of securely fixing a seat belt pretensioner even if the vehicle does not include a beam member in the car body.

solution to the problem

A first aspect of the seat belt device for a vehicle of the present invention includes: an anchor portion provided on a floor member of a vehicle body; and a seat belt pretensioner connected to the anchor portion and linked The seat belt pretensioner is attached to the front end of the seat belt, and the seat belt pretensioner is pulled into the seat belt when an impact force above a predetermined value is applied to the vehicle body.

Regarding the second aspect of the present invention, in the first aspect, the anchor portion includes a mounting bracket connected to the floor member and having a rising surface, and the seat belt pretensioner is connected to the mounting bracket The rising surface of the bracket.

Regarding a third aspect of the present invention, in the first or second aspect, the anchor portion is provided near a pillar member of the vehicle body on the floor member.

Regarding the fourth aspect of the present invention, in the third aspect, the seat belt pretensioner includes: a cylinder accommodating a piston; having one end connected to the piston and the other end connected to the front end of the seat belt a wire part; an actuating part that actuates the piston to pull the wire part into the cylinder when an impact force greater than a predetermined value is applied to the vehicle body; and a fixing part that A fixing portion is provided at an end portion of the cylinder on the wire member side, wherein the cylinder has an orientation extending along the column member, and the fixing portion is coupled to the anchoring portion.

Beneficial Effects of the Invention

According to the first aspect of the seatbelt device for a vehicle of the present invention, the seatbelt pretensioner that pulls in the seatbelt is connected to the anchor portion provided on the floor member of the vehicle body, which makes even for a vehicle body that does not include a beam member, The seat belt pretensioner can also be securely fastened.

According to the second aspect of the present invention, the seat belt pretensioner is connected to the rising surface of the mounting bracket connected to the floor member and having the rising surface, which enables the seat belt pretensioner to be freely fixed to the floor member via the mounting bracket.

According to the third aspect of the present invention, the anchor portion is provided near the pillar member of the vehicle body on the floor member, which prevents the seat belt pretensioner from interfering with the passenger when the passenger enters or exits the vehicle.

According to a fourth aspect of the present invention, in the seat belt pretensioner including the cylinder, the cylinder has an orientation extending along the pillar member so as to connect the fixing portion of the seat belt pretensioner to the anchor portion, which prevents the Or the cylinder of the seat belt pretensioner interferes with the passenger when getting out of the vehicle.

Description of drawings

FIG. 1 is a perspective view of a mounting structure of a seat belt pretensioner in a seat belt device for a vehicle according to the present invention.

Fig. 2 is a longitudinal sectional view taken along line A-A in Fig. 1 .

List of Reference Marks

2 Center column (column part)

6 Floor (floor parts)

8 Reinforcement Department

10 retractor

12 seat belts

20 seat belt pretensioner

22 cylinders

26 Frame part (fixed part)

27 Fixing holes

40 Seat belt pretensioner mounting bracket (anchor part)

detailed description

Now, an embodiment of a seat belt device for a vehicle according to the present invention will be described with reference to FIGS. 1 and 2 .

For example, the vehicle to which the seat belt device for a vehicle according to the present invention is applied is a pickup truck that includes a vehicle frame at the lower portion of the vehicle body, includes front seats and rear seats, and includes front doors and rear doors on each side of the vehicle body , the center pillar is located between the front door and the rear door.

1 is a main part of a three-point seat belt device provided on a front seat in a vehicle, that is, a retractor 10 and a seat belt pretensioner 20 provided at a lower portion of a center pillar (pillar member) 2 as a vehicle body member. Perspective view of the mounting structure. For the sake of convenience, the trim parts covering the vehicle body parts are omitted here.

As shown in FIG. 1, the center column 2 includes a center column exterior 2a and a center column interior 2b welded together, and a retractor 10 is accommodated in the center column 2 from a lower opening 3 of the center column interior 2b, and is passed through bolts 4, 5 It is fixed inside the center column 2b.

The retractor 10 and the seat belt pretensioner 20 are connected by the seat belt 12, which enables the seat belt 12 to restrain the passenger sitting on the front seat to the front seat. Basic functions of the seat belt device of a vehicle and details of the construction of the retractor 10 are known, and description thereof will be omitted here.

The vehicle includes a frame at the lower portion of the body and thus does not include beam members at the lower portion of the sides of the body, and as shown in FIG. Thus, for a vehicle body that does not include a beam member, the seat belt pretensioner 20 cannot be fixed to the beam member having high rigidity as conventionally.

Thus, in the seat belt device for a vehicle according to the present invention, the seat belt pretensioner 20 is fixed to the floor panel 6 . Now, the configuration of the seat belt pretensioner 20 and the installation structure of the seat belt pretensioner 20 and the floor 6 will be described.

The seat belt pretensioner 20 is configured as a deflagration type device that is activated to pull in the seat belt 12 from its front end side when an impact force greater than a predetermined value is applied.

Specifically, the seat belt pretensioner 20 includes: an elongated cylinder 22; a piston accommodated in the cylinder 22 and a gas generating agent (actuating member) such as gunpowder (both are not shown); moving part) 24, which ignites the gas generating agent; a plate-shaped frame portion (fixed portion) 26, which is provided to protrude forward from one end of the cylinder 22, and has a fixing hole 27 at the center (see FIG. 2); wire insertion a passage 28 formed to surround substantially half the circumference of the fixing hole 27 in the frame portion 26 ; and a wire member 30 displaceably inserted through the wire insertion passage 28 . One end of the wire member 30 is linked to the piston in the cylinder 22 , and the other end of the wire member 30 is connected to the front end of the seat belt 12 via the belt connector 32 . The wire member 30 and the ribbon connector 32 are covered by a cover member 34 .

A seat belt pretensioner mounting bracket (hereinafter simply referred to as a mounting bracket) 40 located near the center pillar 2 to mount the seat belt pretensioner 20 to the floor 6 is connected to the floor 6 by bolts 50 . Thus, the anchor portion is configured to include the mounting bracket 40 that secures the seat belt pretensioner 20 to the floor 6 .

As shown in FIG. 2 , the mounting bracket 40 is bent into an L shape, and includes a bottom surface 41 having an outer surface abutting the floor 6 and a raised surface 42 having an outer surface facing the center pillar 2 . The mounting bracket 40 is configured such that the bottom surface 41 has a hat-shaped section and has a recess 43 drilled with a through hole 44 at the center, and the rising surface 42 has a through hole 45 at its center for connecting the seat belt pretensioner 20 , and The raised surface 42 has a weld nut 46 surrounding the through hole 45 on the outer surface.

As shown in FIG. 2 , a through hole 7 is drilled in the floor 6 , and a reinforcement 8 thicker than the floor 6 is welded as a reinforcing member to the rear surface of the floor 6 so that the through hole 9 is aligned with the through hole 7 . Then, weld nuts 9 a are provided around the through holes 9 in the reinforcement 8 .

Thus, the mounting bracket 40 is connected to the floor 6 by means of bolts 50 screwed into weld nuts 9a through through holes 44 and through holes 7,9.

In the seat belt pretensioner 20 constructed as described above, the cylinder 22 is provided along the center pillar 2 approximately perpendicular to the floor 6, and the wire member 30 led out from the end of the wire insertion passage 28 has a direction toward the front and the front of the vehicle. Orientation that extends diagonally upward. The seat belt pretensioner 20 is attached to the mounting bracket 40 with the bolt 60 screwed into the weld nut 46 through the fixing hole 27 in the frame portion 26 , the washer 62 and the through hole 45 in the mounting bracket 40 .

In this way, the seat belt pretensioner 20 is securely fastened to the floor panel 6 via the mounting bracket 40 even for a vehicle body that does not include a beam member.

Therefore, even if the seat belt pretensioner 20 is fixed to the floor panel 6, when a predetermined or more impact force is applied to the vehicle body due to a collision or the like, the seat belt pretensioner 20 generates gas in the cylinder 22, and the expansion of the gas moves the piston. bit. The displacement of the piston is transmitted to the seat belt 12 via the wire member 30 and the belt connector 32 to pull in the seat belt 12 . Accordingly, the passenger sitting on the front seat is restrained to the front seat by the seat belt 12 .

As described above, according to the vehicle seat belt device of the present invention, the seat belt pretensioner 20 is fixed to the floor panel 6 via the mounting bracket 40, so that the seat belt pretensioner can be securely fixed even to a vehicle body that does not include a beam member. 20.

In particular, the anchoring portion includes a mounting bracket 40 , so that the seat belt pretensioner 20 can be freely fixed to the mounting bracket 6 in a desired orientation via the mounting bracket 40 .

In this case, the mounting bracket 40 is located near the center pillar 2 and connected to the floor 6 , and the cylinder 22 of the seat belt pretensioner 20 is arranged along the center pillar 2 approximately perpendicular to the floor 6 . This prevents the cylinder 22 and the seat belt pretensioner 20 from interfering with the occupants as they enter and exit the vehicle.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, in the above-mentioned embodiments, the three-point seat belt device of the front seat has been taken as an example, but the seat belt device is not limited to the device of the front seat but may be the device of the rear seat. Also, the seat belt device is not limited to a three-point seat belt device, but may be a two-point seat belt device or a four-point seat belt device.

In this embodiment, a pickup truck including a front seat and a rear seat has been taken as an example, but it is not limited thereto. For example, a vehicle without a rear seat in which the retractor 10 is accommodated in a rear pillar may also be applied as long as the vehicle does not include a beam member. Even in this case, as described above, the seat belt pretensioner 20 is fixed to the floor near the rear pillar, thereby achieving the same advantages as above.

Claims (4)

1. A safety belt device for a vehicle, comprising: an anchor portion provided on the floor member of the vehicle body; and a seat belt pretensioner connected to the anchor portion and joined to the front end of the seat belt, and pulled into the seat belt, in, the anchor portion includes a mounting bracket connected to the floor component, the mounting bracket is bent into an L shape and includes a bottom surface having an outer surface abutting the floor member and a raised surface having an outer surface facing the center pillar, and The seat belt pretensioner is connected to the rising surface of the mounting bracket and the floor member is connected to the bottom surface. 2. The seat belt apparatus for a vehicle according to claim 1, wherein the bottom surface has a hat-shaped cross-section as a whole. 3. The seat belt device for a vehicle according to claim 1 or 2, wherein the anchor portion is provided near a pillar member of the vehicle body on the floor member. 4. The seat belt device for a vehicle according to claim 3, wherein said seat belt pretensioner comprises: a cylinder accommodating a piston; having one end coupled to said piston and said front end coupled to said seat belt the other end of the wire part; an actuation part that actuates the piston to pull the wire part into the cylinder when an impact force above a predetermined value is applied to the vehicle body; and part, the fixing part is provided at the end part of the cylinder on the side of the line member, Wherein, the cylinder has an orientation extending along the column member, and the fixing part is connected to the anchoring part.