JP2012131425A - Retractor attachment structure for rear-seat seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the fixing strength of a retractor without causing an increase of vehicle weight and the narrowing of a cabin, in a hatchback vehicle.SOLUTION: This retractor attachment structure for a rear center-seat seat belt of the hatchback vehicle having a backdoor includes: a roof back member 112 attached to the rear end of a roof; a rear pillar reinforcement 118 fixed to the upper end of a rear pillar panel 116 which is located at the rear end of a vehicle side face; a rear combination lamp housing 120 which is arranged at the upper corner of a vehicle back face, and to which a rear combination lamp is attached; a roof back reinforcement 114 which straddles the roof back member, the rear pillar reinforcement and the vehicle outside of the rear combination lamp housing, and is fixed to all of them; and the retractor fixed to the roof back reinforcement via one or both of the roof back member and the rear pillar reinforcement from the inside of the vehicle.

Description

  The present invention relates to a mounting structure for a retractor for a rear seat belt of a hatchback vehicle having a back door.

  A three-point seat belt for a vehicle rear seat is widely used (for example, Patent Document 1). The three-point seat belt for the rear seat is wound around a seat belt retractor (hereinafter also simply referred to as “retractor”) in the same manner as that for the front seat. The retractor pulls out or winds up the seat belt in accordance with the movement of the occupant, and always keeps the seat belt in close contact with the occupant's body. In an emergency such as a sudden stop or collision of the vehicle, the retractor locks the seat belt, and the seat belt cannot be pulled out from the retractor. As a result, the occupant is instantly restrained by the seat belt without looseness.

  When the seat belt restrains the occupant in an emergency, a large force is applied to the retractor that locks the seat belt that has received the occupant's body. However, an occupant seat belt seated on the left and right sides of the rear seat of the vehicle is generally attached to the left and right rear pillars having high strength. Therefore, the retractor that winds up these seat belts can be fixed in its fixed position without moving even when a large force is applied.

  On the other hand, a two-point seat belt that holds the waist of the occupant has been adopted for the occupant sitting in the rear center seat of the vehicle. However, in recent years, the use of a safer three-point seat belt is being adopted also in the rear central seat of the vehicle. For example, according to Patent Document 1, the other end of a bracket having a retractor fixed to one end is applied to the lower surface of the roof corner reinforcing member and fixed with a bolt and a nut. The retractor retracts the three-point seat belt.

  In general, when a three-point seat belt is employed in the rear center seat of a hatchback vehicle having a back door opening, the retractor that winds up the seat belt is fixed to the roof back member located at the rear end of the roof of the vehicle. . Therefore, a large force acts on the cross section of the roof back member by the tension acting on the seat belt at the time of a vehicle collision.

JP 2002-302012 A

  However, the opening of the back door is generally designed widely, and the roof back member to which the retractor is attached extends long in the vehicle width direction. If such a large force acts on the roof back member having such an elongated shape, there is a risk that the cross-sectional deformation will occur. If the cross-sectional deformation occurs, the occupant's body to be restrained moves forward of the vehicle even though the seat belt is locked. Therefore, it is necessary to take measures to prevent the cross-sectional deformation of the roof back member.

  As the above measures, for example, a method in which a retractor is installed at a place where the rear pillar reinforcement and the roof back member overlap, and a reinforcing reinforcement is further added to the part. If the retractor is supported by these three parts, it is considered that the cross-sectional deformation of the roof back member can be prevented to some extent.

  However, when such a configuration is used, it is necessary to extend the dimensions of both the rear pillar reinforcement and the roof back member in order to overlap each other. Further, since reinforcement for reinforcement is added to the pillar portion, the weight of the vehicle body is inevitably increased. Furthermore, this structure also has a drawback that the roof protrudes toward the vehicle interior side by the reinforcement reinforcement provided in the pillar portion, and the vehicle interior becomes narrow.

  In view of such a problem, the present invention is a hatchback vehicle having a back door, wherein the fixing strength of the retractor is improved without increasing the weight of the vehicle body or narrowing the passenger compartment. Its purpose is to provide a structure.

  In order to solve the above-described problems, a representative configuration of the present invention includes a roof back member provided at a rear end of a roof in a mounting structure of a rear center seat belt retractor of a hatchback vehicle having a back door, and a rear side of the vehicle. Rear pillar reinforcement fixed at the upper end of the rear pillar located at the end, rear combination lamp housing provided at the upper rear corner of the vehicle to which the rear combination lamp is mounted, roof back member, rear pillar reinforcement and rear combination lamp housing A roof back reinforcement that is fixed to all over the outside, and a rear center seat belt retractor that is fixed to the roof back reinforcement from one or both of the roof back member and the rear pillar reinforcement from the inside of the vehicle. It is characterized by having

  According to the above configuration, the roof back reinforcement that is pulled forward of the vehicle under the load from the seat belt has three members: a roof back member, a rear pillar reinforcement, and a rear combination lamp housing fixed to the inside of the vehicle. Disperse the load on Therefore, the retractor can be securely fixed in its fixed position without causing the cross-sectional deformation of the roof back member that occurs in the prior art in which the retractor is attached only to the roof back member.

  In addition, since the retractor is fixed to a member that has existed in the past, the roof back reinforcement, it is not necessary to newly provide some reinforcing reinforcement. Therefore, although the fixing strength of the retractor is increased, the vehicle body weight is not increased and the passenger compartment is not narrowed.

  The rear pillar reinforcement may be connected to the rear end of the roof side panel provided on the roof side and the end of the roof back member.

  According to the above configuration, the rear pillar reinforcement, which is one member for distributing the load by the roof back reinforcement, is further connected to a total of three members, that is, the rear pillar, the roof back member, and the roof side panel.

  Conventionally, in order to improve the fixing strength of the retractor, these three members were extended and directly overlapped. Therefore, the weight has increased. In the present invention, this is solved, and a common rear pillar reinforcement is connected to all three members that do not overlap with each other, so that the load received from the roof back reinforcement can be further distributed.

  In particular, the roof back reinforcement is not directly connected to the two members of the roof side panel and the rear pillar. Therefore, the force can be transmitted to these two members only through the rear pillar reinforcement.

  Said roof back reinforcement is good to have the seat surface for back door hinges which opens and closes a back door on the back. By providing a back door hinge for attaching a back door to an existing member called a roof back reinforcement, it is possible to open and close the back door without providing additional parts and increasing the number of parts and the weight of the vehicle body.

  The roof back member has a convex portion toward the inside of the vehicle, the roof back reinforcement is separated from the convex portion of the roof back member, and the roof back member and the roof back reinforcement are on the vehicle side of both A closed curve may be formed by a cross section in a perspective view.

  According to said structure, the rigidity of the roof back reinforcement to which a rear center seat seatbelt retractor is fixed improves, and a retractor is fixed more firmly.

  According to the present invention, in a hatchback vehicle having a back door, it is possible to provide a retractor mounting structure for a rear center seat seat belt that improves the fixing strength of the retractor without causing an increase in vehicle body weight or a narrowing of the passenger compartment. is there.

It is a top view of the vehicle body rear part of the hatchback vehicle to which the embodiment of the mounting structure of the retractor for the rear center seat seat belt according to the present invention is applied. It is the figure which removed the roof panel from FIG.1 (b). FIG. 3 is a view in which a side body outer is removed from FIG. 2. It is a figure which shows the state which removed the roof back reinforcement from FIG. 3, and was attached with the retractor. It is the figure which looked at the retractor before fixing like FIG. 4 from the vehicle interior side. It is the figure which looked at the retractor of FIG. 4 from the vehicle interior side. It is the figure which looked at FIG. 3 from the vehicle back. It is AA sectional drawing of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Hatchback vehicle)
FIG. 1 is a plan view of a rear part of a vehicle body of a hatchback vehicle to which an embodiment of a mounting structure for a rear center seat belt retractor according to the present invention is applied. FIG. 1A is a plan view of the rear part of the vehicle body, and FIG. 1B is a partially enlarged view of FIG. FIG. 1B is an enlarged view of the rear portion of the right side surface of the hatchback vehicle 100, but the illustration is omitted because the rear portion of the left side surface is symmetrical with the rear portion of the right side surface.

  The hatchback vehicle 100 is a vehicle having a back door 102. The back door 102 is rotated and opened / closed by a hinge mechanism (not visible in FIG. 1) provided at the upper end of the back door glass 104. More specifically, the back door glass 104 side rotates with the thick line 108 shown in FIG. 1B as a boundary, and the roof panel 106 constituting the top surface of the vehicle and the side body outer 110 constituting the vehicle side surface are stationary. Yes.

(Roofback reinforcement)
FIG. 2 is a view in which the roof panel 106 is removed from FIG. Under the roof panel 106, a roof back member 112 provided at the rear end of the roof extends in the vehicle width direction. A roof back reinforcement 114 that reinforces the roof back member 112 is mounted on the end of the roof back member 112.

  FIG. 3 is a view in which the side body outer 110 is removed from FIG. A rear pillar reinforcement 118 that reinforces the rear pillar panel 116 is fixed to the upper end of the rear pillar panel 116 that constitutes the rear pillar located at the rear end of the side surface of the vehicle. A rear combination lamp housing 120 to which a rear combination lamp (not shown) is attached is provided at the upper rear corner of the vehicle.

  As shown in FIG. 3, the roof back reinforcement 114 is fixed to all the three members not only on the roof back member 112 but also across the rear pillar reinforcement 118 and the rear combination lamp housing 120. .

(Retractor)
FIG. 4 is a view showing a state in which the roof back reinforcement 114 is removed from FIG. 3 and a rear center seat belt retractor 122 (hereinafter also simply referred to as “retractor 122”) is attached to the vehicle body. Since the roof back reinforcement 114 has been removed for convenience of illustration, the retractor 122 can be seen through the opening 126 provided in the roof back member 112.

  In practice, however, the retractor 122 shown in FIG. 4 is fixed to the roof back reinforcement 114 located at the position shown in FIG. 3 from the inside of the vehicle via either or both of the roof back member 112 and the rear pillar reinforcement 118. Yes.

  The retractor 122 is a device that pulls out or winds up a seat belt 124 for a rear central seat (not shown) in accordance with the movement of the occupant. FIG. 4 also shows an occupant seat belt 128 seated on the right side of the rear seat of the vehicle.

(Retractor mounting structure)
FIG. 5 is a view of the retractor 122 before being fixed as shown in FIG. The rear center seat belt retractor 122 has claw portions 130 and 132 for positioning. The claw portions 130 and 132 are inserted into positioning holes 134 and 136 formed in the rear pillar reinforcement 118 and the roof back member 112, respectively.

  When the claw portions 130 and 132 are slightly slid rearward along the shape of the positioning holes 134 and 136, the positioning of the retractor 122 is completed. When the positioning is completed, the bolts 138 and 140 are inserted into the bolt holes 142 and 144 of the retractor 122 and further inserted into the bolt holes 146 and 148 provided in the rear pillar reinforcement 118 and the roof back member 112.

  The bolt hole 146 passes through the overlapped rear pillar reinforcement 118 and the roof back member 112, and the bolt 138 inserted into the bolt hole 146 has a leg portion exposed outside the passenger compartment as shown in FIG. On the other hand, the bolt hole 148 penetrates only the roof back member 112, and the bolt 140 inserted into the bolt hole 148 also has a leg exposed outside the vehicle compartment as shown in FIG.

  When the leg portions of the bolts 138 and 140 in FIG. 4 are also passed through the bolt holes provided in the roof back reinforcement 114 and fastened and fixed by the nuts 150 and 152, the state shown in FIG. In FIG. 3, the retractor 122 is not shown.

  6 is a view of the retractor 122 of FIG. 4 as viewed from the passenger compartment side. Actually, the retractor 122 is covered by roof lining (not shown) laid on the passenger compartment side of the roof panel 106 and a seat belt cover 154 (not shown in FIG. 6) in FIG. 5 and is not visible from the passenger compartment side. .

  In an emergency such as a sudden stop or collision of the vehicle 100, the retractor 122 locks the seat belt 124, and the seat belt 124 cannot be pulled out from the retractor 122. As a result, the occupant is instantly restrained by the seat belt 124 without looseness. When the seat belt 124 restrains the occupant in an emergency, a large force is applied to the retractor 122 that locks the seat belt 124 that has received the occupant's body.

  When the roof back reinforcement 114 receives a load from the retractor 122, the roof back reinforcement 114 is pulled forward of the vehicle. However, according to the configuration of the present embodiment, the load is distributed to the three members of the roof back member 112, the rear pillar reinforcement 118, and the rear combination lamp housing 120 that are fixed to the inside of the roof back reinforcement 114.

  Therefore, the retractor 122 can be securely fixed in its fixed position without causing the cross-sectional deformation of the roof back member 112 that occurs in the prior art in which the retractor 122 is attached only to the roof back member 112.

  In addition, since the retractor 122 is fixed to the existing member, the roof back reinforcement 114, there is no need to provide any reinforcement reinforcement. Therefore, although the fixing strength of the retractor 122 is increased, the vehicle body weight is not increased and the passenger compartment is not narrowed.

(Rear pillar reinforcement)
For example, as shown in FIG. 4, the rear pillar reinforcement 118 is connected to a rear end of a roof side panel 156 (also called a roof side rail) provided on the side of the roof panel 106 and an end of the roof back member 112. ing. The rear pillar reinforcement 118 is one member that disperses the load that the roof back reinforcement 114 receives from the retractor 122.

  Therefore, the rear pillar reinforcement 118 to which the load is transmitted further distributes the load to the following three members and transmits the same. The three members are a rear pillar panel 116, a roof back member 112, and a roof side panel 156.

  Conventionally, in order to improve the fixing strength of the retractor 122, these three members are extended and directly overlapped. Therefore, the weight of the vehicle body has increased. In the present embodiment, this is solved, and the common rear pillar reinforcement 118 is connected to all the three members that do not overlap with each other, so that the load received from the roof back reinforcement 114 can be further dispersed.

  In particular, the roof back reinforcement 114 is not directly connected to the two members of the roof side panel 156 and the rear pillar panel 116. Therefore, the force can be transmitted to these two members only through the rear pillar reinforcement 118.

  As shown in FIG. 4, in this embodiment, the rear pillar reinforcement 118 is also connected to the upper end of the rear combination lamp housing 120. Therefore, the load can be distributed and transmitted to the rear combination lamp housing 120 as well.

(Seat for back door hinge)
FIG. 7 is a view of FIG. 3 as viewed from the rear of the vehicle. A back door hinge 160 for opening and closing the back door 102 is attached to the roof back reinforcement 114. That is, a seat surface 162 for the back door hinge 160 is provided in advance on the back surface of the roof back reinforcement 114.

  Thus, in the present embodiment, the roof back reinforcement 114 not only distributes the load from the retractor 122. A back door hinge 160 for attaching the back door 102 can be attached to a seating surface 162 provided on an existing member called the roof back reinforcement 114. Thereby, it is not necessary to provide a separate part for attaching the back door hinge 160, and the back door 102 can be opened and closed without increasing the number of parts and the weight of the vehicle body.

(Closed curve by cross section)
8 is a cross-sectional view taken along the line AA in FIG. The roof back member 112 has a convex portion 112A toward the inside of the vehicle. On the other hand, the roof back reinforcement 114 is separated from the convex portion 112 A of the roof back member 112. Therefore, the roof back member 112 and the roof back reinforcement 114 form a closed curve between the joint portions 166 and 168 in FIG.

  According to said structure, the rigidity of the roof back reinforcement 114 to which the rear center seat seatbelt retractor 122 is fixed improves, and the retractor 122 is fixed more firmly.

  A two-dot chain line 164 shown in FIG. 8 shows a shape when the roof back reinforcement 114 does not deviate from the convex portion 112A of the roof back member 112 as a comparative example with the present embodiment. In such a comparative example, the high rigidity of the roof back reinforcement 114 as in this embodiment forming a closed curve cannot be obtained.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a mounting structure for a rear seat belt retractor for a hatchback vehicle having a back door.

DESCRIPTION OF SYMBOLS 100 ... Hatchback vehicle 102 ... Back door 104 ... Back door glass 106 ... Roof panel 110 ... Side body outer 112 ... Roof back member 112A ... Convex part 114 ... Roof back reinforcement 116 ... Rear pillar panel 118 ... Rear pillar reinforcement 120 ... Rear Combination lamp housing 122 ... Rear central seat seat belt retractors 124, 128 ... Seat belt 126 ... Opening part 130, 132 ... Claw part 156 ... Roof side panel 160 ... Back door hinge

Claims (4)

In the mounting structure of the rear center seat belt retractor of the hatchback vehicle having the back door,
A roof back member provided at the rear end of the roof;
A rear pillar reinforcement fixed to the upper end of the rear pillar located at the rear end of the vehicle side surface;
A rear combination lamp housing provided at the upper rear corner of the vehicle to which a rear combination lamp is attached;
The roof back member, the rear pillar reinforcement, and the roof back reinforcement that is fixed to all over the vehicle outside of the rear combination lamp housing;
A rear central seat seat belt retractor, which is fixed to the roof back reinforcement from one or both of the roof back member and the rear pillar reinforcement from the inside of the vehicle. Mounting structure.   2. The rear center seat belt according to claim 1, wherein the rear pillar reinforcement is connected to a rear end of a roof side panel provided on a roof side portion and an end portion of the roof back member. Retractor mounting structure.   The mounting structure for a rear center seat belt retractor according to claim 1 or 2, wherein the roof back reinforcement has a seat surface for a back door hinge for opening and closing the back door on a back surface thereof. The roof back member has a convex portion toward the vehicle interior;
The roof back reinforcement is separated from the convex portion of the roof back member,
The rear center seat belt retractor according to any one of claims 1 to 3, wherein the roof back member and the roof back reinforcement form a closed curve by a cross section of the vehicle in a lateral view. Mounting structure.

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