JP2006282122A - Retractor mounting structure of seat belt for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retractor mounting structure of a seat belt for an automobile such as a one-box car to mount the retractor by the use of a high stiffness part of a body panel using a simple structure assuring a high strength against the tensile load from seat belt. <P>SOLUTION: The retractor 6 of the seat belt 7 is installed on the intra-cabin side of the body panel 1 behind the door opening to be opened and closed by a slide door on the side of the car body, and the top of the retractor 6 is coupled with a center rail 2 for the slide door having a high stiffness installed on the body panel 1 while the bottom of the retractor 6 is coupled with a rear wheel house 4 installed under the center rail of the body panel 1, and the retractor 6 is supported from above and below by the center rail 2 and the rear wheel house 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a retractor mounting structure for an automobile seat belt, and more particularly to a retractor mounting structure for a three-point seat belt for a rear center seat such as a one-box vehicle having a sliding door.

  Recently, the left and right sides of the three-seat rear seats installed in the rear row of a one-box type wagon car, etc., from the viewpoint of ensuring the safety of a passenger seated in the center in the event of a vehicle collision A three-point seat belt is also installed in the central seat as well as the part seat. Conventionally, in order to install a three-point seat belt in the center seat of the rear seat, a seat belt retractor is installed on the back of the seat back of the center seat and pulled out from the retractor to the front side. A seat that is restrained by the occupant, or a seat that is retracted from the retractor by installing a retractor on a roof header having a closed cross-sectional structure extending in the vehicle width direction along the passenger compartment ceiling slightly behind the rear seat. There is something that restrains the occupant with a belt.

  By the way, in the type in which the retractor is installed in the seat back, when the seat belt restrains the occupant in an emergency such as a vehicle collision, a large tensile load from the seat belt acts on the retractor. The strength and the strength of the installation part where the seat is installed on the floor of the passenger compartment are required, and the mass increase due to the reinforcement of the seat and the mass increase due to the reinforcement of the installation floor are large and uneconomical. In addition, in the type where the retractor is installed on the roof header, the roof header is enlarged to secure the strength against the tensile load from the seat belt, and the passenger compartment head and the passenger compartment ceiling are lowered accordingly. There arises a problem that a sufficient head clearance cannot be secured.

  In addition, when trying to install a three-point seat belt retractor for the central seat on the rear pillar on the side of the passenger compartment, the rear pillar generally already has a three-point seat belt retractor for the left and right side seats of the rear seat. It is difficult to install a retractor for the center seat, and even if it can be installed, the rear pillars are subject to tensile loads from the two seat belts. There is a problem that strength is required and mass is increased by pillar reinforcement.

  In passenger car type station wagons and the like, as described in Patent Document 1 below, as a retractor mounting structure for a three-point seat belt in the rear center seat, a fuel flap opening formed in the rear quarter portion of the vehicle body The rear quarter panel (panel side outer), the rear arch inner forming the rear wheel house, and the rear quarter inner form a closed section, and a retractor is mounted on the vehicle interior side of the rear quarter inner. Some seat belts pulled out from the retractor restrain the occupant seated in the rear center seat.

However, in the one box type wagon car, the rear quarter part has a larger vertical dimension than the passenger car type and the plate assembly shape is different, so a closed cross section is formed on the vehicle interior side of the rear quarter part of the one box car. In order to install the retractor, it is necessary to change the shape of the plate significantly, and the number of added parts increases accordingly.
JP 2001-310703 A

  Therefore, in view of the above circumstances, the present invention can attach a retractor of a three-point seat belt for a rear center seat of a one-box type wagon vehicle with a simple structure using a high-rigidity portion of a vehicle body panel. An object of the present invention is to provide a retractor mounting structure for a seatbelt for automobiles, which has a high strength against the tensile load.

  The present invention provides a vehicle body panel behind a door opening that is opened and closed by a slide door provided on a side of a vehicle body, and a center rail that supports and guides the slide door is provided, and a rear wheel house is provided below the center rail. In a vehicle such as a box vehicle, a seat belt retractor for a rear seat is arranged at a vertically intermediate position between the center rail and the rear wheel house on the vehicle interior side of the vehicle body panel, and the upper end of the retractor is The center rail is coupled and supported, and the lower end of the retractor is coupled to the rear wheel house. Since the upper end of the retractor is supported by the rigid center rail and the lower end is supported by the wheel house, it is possible to mount the retractor with high strength against the tensile load from the seat belt.

  The vehicle body panel has a concave rail installation portion for installing the center rail on the outer surface of the vehicle, and is fastened integrally with a fastening portion between the rail installation portion and the center rail on the vehicle interior side of the rail installation portion. An upper bracket is provided, and the upper end of the retractor is fastened to the upper bracket. A tensile load from the seat belt acting on the retractor is received by the center rail via the upper bracket.

  The rear wheel house is provided with a lower bracket for connecting the lower end of the retractor, and the lower bracket has a lower end between the upper edge of the wheel house inner panel and the upper edge of the wheel house outer panel constituting the rear wheel house. The lower end of the retractor is fastened to the upper end of the lower bracket that is integrally welded and protruded upward from the upper end of the rear wheel house. The rear wheel house receives a pulling load from the seat belt to pull the retractor upward.

  According to the present invention, a retractor for a seat belt for an automobile such as a one-box type wagon car uses a high-rigidity portion including a center rail for a sliding door, the upper end of which is installed on a vehicle body panel on the side of the vehicle body. Since the lower end is connected to the rear wheel house, the structure is simple, and a retractor mounting structure with high strength against the tensile load acting on the retractor from the seat belt can be realized.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a door opening 9 that is opened and closed by a sliding door is formed in the front and rear middle of a vehicle body side portion of a one-box type wagon vehicle. A quarter window opening 10 is formed in the upper half of the rear quarter panel 1 behind the door opening 9. A quarter inner panel 12 is provided on the periphery of the quarter window opening 10 on the vehicle compartment side of the rear quarter panel 1 to form a double panel structure. A center rail 2 that supports the sliding door and guides the door when the door is opened and closed is provided along the lower edge of the quarter window opening 10.

  The lower edge of the quarter window opening 10 has a substantially U-shaped concave section that opens toward the outside of the vehicle by the rear quarter panel 1 and the quarter inner panel 12 provided on the passenger compartment side along the longitudinal direction of the vehicle body. A rail installation portion 13 is formed.

  The center rail 2 is a long rail body having a substantially square C-shaped cross section that opens toward the outside of the vehicle and has high rigidity. The center rail 2 is installed in the rail installation portion 13 from the outside, and a plurality of stud bolts B1 fixed to the back surface of the center rail 2 at a predetermined interval in the longitudinal direction are attached to the rear wall of the rail installation portion 13. While penetrating into the mounting hole, a nut member is fastened and fixed to each stud bolt B1 from the passenger compartment side.

  Three points for the center seat of a three-seat seat (not shown) installed in the last row of the passenger compartment at a position near the rear end of the rail installation part 13 at the lower edge of the quarter window opening 10 An upper bracket 3 for attaching the retractor 6 of the seat belt is attached. The upper bracket 3 is a press-formed product made of a thick metal plate. The upper vertical wall 31 extends along the inner wall of the rail installation portion 13 and extends along the lower wall of the rail installation portion 13 from the lower edge of the upper vertical wall 31. A horizontal wall 32 bent outwardly of the vehicle and a lower vertical wall 33 bent from the end edge of the horizontal wall 32 and extending downward are integrally formed. The longitudinal length of the upper bracket 3 is made larger than the pitch between a plurality of, for example, two stud bolts B1 and B1 on the back surface of the center rail 2.

  The upper bracket 3 has an upper vertical wall 31 sandwiched between the rear quarter panel 1 and the quarter inner panel 12 constituting the rail installation portion 13, and stud bolts of a plurality of center rails 2 passing through both the panels 1 and 12. B1 and B1 are integrally fastened and fixed. The lower vertical wall 33 of the upper bracket 3 extends downward from the rail installation portion 13 and overlaps with a lower edge flange extending downward of the inner panel 12. A bolt through hole is formed at an intermediate position in the overlapping portion between the lower edge flange of the inner panel 12 and the lower vertical wall 33 of the upper bracket 3.

  A rear wheel house 4 is provided at a position directly below the center rail 2 on the lower compartment side of the rear quarter panel 1. The rear wheel house 4 includes a wheel house inner panel 41 and a wheel house outer panel 42, and the upper edge flanges 411 and 421 are coupled to each other. In the upper part of the rear wheel house 4, an oil supply pipe (not shown) extending from an oil supply port 15 formed at an intermediate position of the rear quarter panel 1 is disposed in the wheel house 4 through the wheel house outer panel 42. A bulging portion 43 bulging upward and obliquely rearward is formed. At the upper end of the rear wheel house 4, a lower bracket 5 for attaching the retractor 6 is attached to the rear position of the bulging portion 43 so as to face the upper bracket 3.

  The lower bracket 5 is a thick metal plate, and the lower end is integrally joined to the joint portion between the upper edge flanges 411 and 421 of both the panels 41 and 42 of the rear wheel house 4 and protrudes upward and slightly obliquely rearward. I'm clumsy. In this case, the upper edge flange 411 of the wheel house inner panel 41 is formed wider toward the inner peripheral side of the wheel house than the upper edge flange 421 of the wheel house outer panel 42, and the lower end of the lower bracket 5 is located between the flanges 411, 421. And is spot welded integrally with both flanges 411 and 421 on the outer peripheral side of the wheel house (SP1 in FIGS. 2 and 3) and overlaps only with the upper edge flange 411 of the wheel house inner panel 41 on the inner peripheral side of the wheel house. Matching spot welding is performed (SP2 in FIGS. 2 and 3). According to this, the spot welding points SP1 and SP2 are increased to strengthen the bond strength.

  In the retractor 6, a tongue-like upper mounting portion 61 protruding upward from the upper edge is superposed on the lower vertical wall 33 of the upper bracket 3 and the lower edge flange of the quarter inner panel 12, and these are integrally fastened by a bolt member B2. In addition, a tongue-like lower mounting portion 62 protruding downward from the lower edge is superposed on the upper end of the lower bracket 5 and fastened by a bolt member B3.

  As shown in FIGS. 1, 2, and 4, the seat belt webbing 7 pulled out from the retractor 6 extends slightly rearward and upward from the retractor 6, and the upper end of the rear pillar 81, the rear end of the roof side rail 82, and the roof An intermediate position of the roof header 83 is hung around the first belt anchor 71 provided in the vicinity of the joint with the side end of the header 83, and is routed toward the center in the vehicle width direction along the lower surface of the roof header 83. The passenger is pulled out to the passenger compartment side via the second belt anchor 72 provided in the vehicle, and restrains the passenger who is pulled out and seated on the rear center seat. The retractor 6 and the seat belt webbing 7 are covered with a side wall trim 86 that constitutes a side wall of the passenger compartment, a pillar garnish 87 that covers the rear pillar 81, and a ceiling trim 88 that covers the roof header 83. A passenger seated on both the left and right sides of the rear seat is restrained by a seat belt drawn from a retractor (not shown) attached to the left and right rear pillars 81. In FIG. 1, 84 represents an intermediate pillar, and 85 represents reinforcement for reinforcing the inner surface of the quarter panel 1.

  According to the present embodiment, the upper end and the lower end of the retractor 6 are supported vertically by the high-rigidity center rail 2 installed on the rear quarter panel 1 of the vehicle body and the rear wheel house 4 via the brackets 3 and 5, respectively. Therefore, even if a strong tensile load (white arrow F in FIG. 2) is applied to the retractor 6 from the seat belt 7, the center rail 2 and the rear wheel house 4 receive the tensile load F while the retractor 6 is received. The mounting strength of the retractor 6 with respect to the supporting and pulling load F is high.

  In particular, on the upper end side of the retractor 6, the upper bracket 3 is fastened integrally with the fastening portion between the center rail 2 and the rear quarter panel 1, and further fastened at the fastening portions at a plurality of locations. A sufficient strength can be secured, and a high support force of the retractor 6 by the center rail 2 can be exhibited. Further, at the lower end side of the retractor 6, the lower bracket 5 is linearly projected from the rear wheel house 4 along the direction of the action of the tensile load F (FIG. 2), and the lower end of the retractor 6 is supported thereby. The lower bracket 5 is not deformed by the tensile load F, and the rear wheel house 4 can receive the tensile load F linearly. Further, since the lower end of the lower bracket 5 is sandwiched and welded between the upper edge flanges 411 and 421 of the inner and outer panels 41 and 42 of the rear wheel house 4, welding does not peel off due to the tensile load F.

  Further, only the upper bracket 3 and the lower bracket 5 are added, and the structure is simple and the increase in mass is minimal.

It is the principal part perspective view seen from the compartment side which shows the retractor attachment structure of the three-point seat belt for the rear center seats of the vehicle of this invention. It is the principal part side view seen from the vehicle interior side of the said retractor attachment structure. It is sectional drawing in the position which follows the III-III line | wire of FIG. 1 is a schematic explanatory diagram of a three-point seat belt for a rear center seat of a vehicle.

Explanation of symbols

1 Rear quarter panel (body panel)
13 rail installation part 2 center rail 3 upper bracket 4 rear wheel house 41 wheel house inner panel 42 wheel house outer panel 5 lower bracket 6 retractor 7 seat belt 9 door opening

Claims (3)

A one-box vehicle in which a center rail that supports and guides the sliding door is provided on the vehicle body panel behind the door opening that is opened and closed by the sliding door provided on the side of the vehicle body, and a rear wheel house is provided below the center rail. Vehicle
On the vehicle interior side of the vehicle body panel, a seat belt retractor for the rear seat is arranged at an intermediate position between the center rail and the rear wheel house,
A retractor mounting structure for an automobile seat belt, wherein the upper end of the retractor is coupled and supported to the center rail, and the lower end of the retractor is coupled to the rear wheel house.   The vehicle body panel has a concave rail installation portion for installing the center rail on the outer surface of the vehicle, and is fastened integrally with a fastening portion between the rail installation portion and the center rail on the vehicle interior side of the rail installation portion. 2. The retractor mounting structure for an automobile seat belt according to claim 1, wherein an upper bracket is provided and the upper end of the retractor is fastened to the upper bracket.   The rear wheel house is provided with a lower bracket for connecting the lower end of the retractor, and the lower bracket has a lower end between the upper edge of the wheel house inner panel and the upper edge of the wheel house outer panel constituting the rear wheel house. The retractor mounting structure for an automobile seat belt according to claim 1 or 2, wherein a lower end of the retractor is fastened to an upper end of the lower bracket that is integrally welded and protruded upward from an upper end of the rear wheel house. .

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