Bracket holding structure

Abstract

A bracket holding structure comprises: a bracket provided with a first holding part that holds a retractor connected to one end of a webbing for restraining an occupant in a vehicle seat, and a second holding part that holds a wrap pretensioner connected to the other end of the webbing; a side sill reinforcement provided to a side sill of a vehicle body; and a side sill inner that is adjacent to the side sill reinforcement in the vehicle width direction and located inside the side sill reinforcement in the vehicle width direction. The lower part of the bracket is sandwiched and fixed from both sides in the vehicle width direction by the side sill reinforcement and the side sill inner.

Description

[Technical Field]

[0001] The present invention relates to a bracket holding structure in a vehicle seat belt device. [Background technology]

[0002] Typically, vehicles such as automobiles are provided with a seat belt device that uses webbing to restrain a seated occupant. Conventionally, seat belt devices equipped with a lap pretensioner have been known that pull and tension the webbing when the vehicle suddenly decelerates, thereby reducing the amount of occupant movement due to inertial force during a collision and quickly restraining and protecting the occupant.

[0003] Fig. 8 is a schematic diagram showing a state in which a lap pretensioner in Patent Document 1 is installed below a seat. As shown in Fig. 8, the mounting structure 108 for a lap pretensioner 120 in Patent Document 1 includes a retractor anchor 122 that supports, on a vehicle body 101, a retractor 104 to which one end 114a of a shoulder portion 114 of a webbing 112 is connected, and a lap anchor 126 that fixes, to a bracket 130, the lap pretensioner 120 to which one end 116a of a lap portion 116 of the webbing 112 is connected. The one end 114a of the shoulder portion 114 is inserted into a pillar portion 102 and connected to the retractor 104. The retractor 104 is fixed to the pillar portion 102.

[0004] The bracket 130 has a vertical portion 134 to which the lap pretensioner 120 is fixed, with one end being fixed to the side of the vehicle body 101 by a retractor anchor 122 and the other end being fixed to the floor portion 101a by a final anchor 124. The lap pretensioner 120 is fixed to the bracket 130 by a lap anchor 126, and is supported by the retractor anchor 122 and the final anchor 124 via the bracket 130. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2014-113931 Summary of the Invention [Problem to be solved by the invention]

[0006] According to the technology disclosed in Patent Document 1, it is possible to provide a lap pretensioner mounting structure 108 that allows for the placement of a lap pretensioner 120 with little modification to the vehicle body structure, a simple configuration, and no increase in cost, even in a vehicle in which the side sills are located below the floor portion 101a.

[0007] Thus, in addition to seat belt devices that hold the webbing with a stronger structure, there is always a demand for highly robust devices that can exhibit stable performance without variations in manufacturing and assembly, and research and development is being conducted to further improve safety.

[0008] The present invention has been made in view of the above problems, and an object of the present invention is to provide a bracket holding structure in a seat belt device that is capable of firmly holding the seat belt and has excellent robustness. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention has, for example, the following configuration. (1) A bracket including a first retaining portion that retains a retractor connected to one end of a webbing that restrains an occupant in a vehicle seat, and a second retaining portion that retains a lap pretensioner connected to the other end of the webbing; A side sill reinforcement provided on a side sill of a vehicle body; A side sill inner that is adjacent to the side sill reinforcement in the vehicle width direction and is arranged more inward in the vehicle width direction than the side sill reinforcement; Equipped with A lower portion of the bracket is sandwiched and fixed between the side sill reinforcement and the side sill inner from both sides in the vehicle width direction. Bracket holding structure. (2) A first joint portion is provided at which the lower portion of the bracket, the side sill reinforcement, and the side sill inner are joined. The bracket holding structure described in (1). (3) The first joint portion is located on an extension line of the lap pretensioner in the load input direction. (2) The bracket holding structure described above. (4) a center pillar inner lower section disposed between the side sill reinforcement and the side sill inner section in the vehicle width direction so as to be sandwiched together with the lower portion of the bracket; a second joint portion where the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with A bracket holding structure according to any one of (1) to (3). (5) a center pillar inner lower section disposed between the side sill reinforcement and the side sill inner section in the vehicle width direction so as to be sandwiched together with the lower portion of the bracket; a second joint portion where the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with The center pillar inner lower section is provided with an opening that penetrates the center pillar inner lower section in the vehicle width direction in order to provide the first joint portion. A bracket holding structure according to (2) or (3). (6) The first joint portion and the second joint portion are arranged side by side in the vehicle front-rear direction. (5) A bracket holding structure as described above. (7) The first joint portion and the second joint portion are configured by a plurality of welding points arranged in a line in the vehicle front-rear direction, The plurality of welding points are arranged such that adjacent welding points in the vehicle longitudinal direction are shifted from each other in the vehicle vertical direction. A bracket holding structure according to (5) or (6). (8) The second holding portion of the bracket is disposed on a lower side of the vehicle than the first holding portion of the bracket, The first joint portion is located below the second holding portion. A bracket holding structure according to any one of (2) and (5) to (7). (9) The bracket is a plurality of planar portions that are arranged in a shifted manner in the vehicle width direction and are parallel to each other; a curved portion provided between adjacent planar portions and curved in the vehicle width direction; Equipped with A bracket holding structure according to any one of (1) to (8). (10) The plurality of planar portions are a first flat portion on which the first holding portion is provided; a second flat surface portion located below the first flat surface portion on the vehicle and on which the second holding portion is provided; a third flat portion, which is the lower portion, located below the second flat portion and sandwiched and fixed by the side sill reinforcement and the side sill inner from both sides in the vehicle width direction; Including, (9) A bracket holding structure as described above. (11) The curved portion is a first curved portion and a second curved portion formed between the first flat surface portion and the second flat surface portion in the vehicle up-down direction; a third curved portion formed between the second flat surface portion and the third flat surface portion in the vehicle up-down direction; Including, the first curved portion defines a lower edge of the first planar portion, extends in the vehicle front-rear direction, and is connected to the second curved portion; the second curved portion defines an upper edge of the second flat portion, inclines downward as it extends in the vehicle front-rear direction, and has a lower end connected to the third curved portion, The third curved portion extends in the vehicle front-rear direction and defines a lower edge of the second flat surface portion and an upper edge of the third flat surface portion. (10) A bracket holding structure. (12) The third curved portion has a plurality of bent portions that incline the direction extending in the vehicle longitudinal direction toward the vehicle vertical direction and / or the vehicle width direction. The bracket holding structure according to (11). [Effects of the Invention]

[0010] According to the bracket holding structure of the present invention, it is possible to provide a bracket holding structure that is capable of firmly holding a seat belt device and has excellent robustness. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of the interior of a vehicle body to which a bracket holding structure according to an embodiment of the present invention can be applied; [Figure 2] 1 is a side view of a bracket holding structure according to an embodiment of the present invention. [Figure 3] 3 is an enlarged side view showing the lap pretensioner, the retractor, and the first and second holding portions from FIG. 2, with the lap pretensioner, the retractor, and the first and second holding portions omitted. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. [Figure 6A] FIG. 6A is a perspective view of the bracket when it is attached to the vehicle body, as viewed from the front and from the inside in the vehicle width direction. [Figure 6B] FIG. 6B is a side view of the bracket when it is attached to the vehicle body, as viewed from the inside in the vehicle width direction. [Figure 6C] FIG. 6C is a top view of the bracket as seen from above in a state where it is attached to the vehicle body. [Figure 6D] FIG. 6D is a front view of the bracket as seen from the front side in the state where it is attached to the vehicle body. [Figure 7] FIG. 4 is a side view showing the direction of a load in the bracket holding structure. [Figure 8] FIG. 1 is a schematic diagram showing a state in which a lap pretensioner is installed below a seat in Patent Document 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] A bracket holding structure according to one embodiment of the present invention will be described below with reference to the drawings. In Fig. 1 to Fig. 7, the front side of the vehicle is indicated as "front," the rear side of the vehicle as "rear," the upper side of the vehicle as "up," the lower side of the vehicle as "lower," the outer side in the vehicle width direction as "outside," and the inner side in the vehicle width direction (the center side in the vehicle width direction) as "inside." The type of vehicle to which the bracket holding structure of this embodiment is applicable is not particularly limited, and the structure can be applied to various types of vehicles, such as gasoline-powered vehicles, electric vehicles (EVs), hybrid vehicles (HEVs), and plug-in hybrid vehicles (PHEVs).

[0013] FIG. 1 is a perspective view of the inside of a vehicle body to which a bracket holding structure according to an embodiment of the present invention can be applied.

[0014] As shown in FIG. 1, the webbing 12 of the seat belt device 10 is composed of a shoulder portion 14 that is hung diagonally from the shoulder to the waist of an occupant seated in a vehicle seat 6, and a lap portion 16 that is hung laterally across the waist of the occupant.

[0015] One end 14a of the webbing 12 on the shoulder portion 14 side is inserted into the pillar portion 2 and connected to a retractor 40. The retractor 40 is attached to a bracket 30, which will be described later, and fixed to the vehicle body 1.

[0016] A tongue 19 is attached to the boundary between the shoulder portion 14 and the lap portion 16. The tongue 19 is secured to a buckle 18 when the occupant fastens the webbing 12. The other end 16a of the webbing 12 on the lap portion 16 side is connected to a lap pretensioner 20.

[0017] The lap pretensioner 20 is provided along the front-to-rear direction of the vehicle between the vehicle seat 6 and the entrance / exit door 1b in the vehicle width direction. A wire 20a of the lap pretensioner 20 is connected to the other end 16a of the lap portion 16 that restrains an occupant seated in the vehicle seat 6. The wire 20a pulls the webbing 12 to tighten the webbing 12 during sudden deceleration of the vehicle, thereby reducing the amount of movement of the occupant and quickly restraining and protecting the occupant. The lap pretensioner 20 burns explosives during sudden deceleration of the vehicle, generating high-pressure gas to actuate a piston that pulls in the webbing 12 connected to the wire 20a, thereby removing slack in the webbing 12 equivalent to the movement of the piston.

[0018] Fig. 2 is a side view of a bracket holding structure according to an embodiment of the present invention. Fig. 3 is an enlarged side view showing the lap pretensioner 20, the retractor 40, and the first and second holding portions 31, 32 omitted from Fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. Fig. 5 is a cross-sectional view taken along line VV in Fig. 3.

[0019] 2 to 5, the bracket holding structure of this embodiment includes a bracket 30, a side sill reinforcement 5 provided on a side sill 3 of the vehicle body, a side sill inner 4 adjacent to the side sill reinforcement 5 in the vehicle width direction and positioned more inward in the vehicle width direction than the side sill reinforcement 5, and a center pillar inner lower 7 provided at the bottom of the pillar portion 2. The side sill reinforcement 5 and the side sill inner 4 form the side sill 3 on the lower side of the entrance / exit door 1b (see FIG. 1).

[0020] The center pillar inner lower section 7 is a plate-shaped member that is disposed inside the lower section of the pillar section 2 in the vehicle width direction and extends in the vehicle up-down direction. As shown in Figures 2 and 3, the outer shape of the center pillar inner lower section 7 viewed from the vehicle width direction is substantially the same as the outer shape of the lower section of the pillar section 2, and has an upper section 7a provided on the pillar section 2, and a lower section 7b that is connected to the upper section 7a and extends downward between the side sill inner section 4 and the side sill reinforcement 5 in the vehicle width direction.

[0021] 4 and 5, the lower portion 7b of the center pillar inner lower portion 7, together with the lower portion 30b of the bracket 30, is arranged so as to be sandwiched between the side sill inner portion 4 and the side sill reinforcement portion 5 on both sides in the vehicle width direction. The arrangement order in the vehicle width direction is, from the inside, the side sill inner portion 4, the bracket 30, the center pillar inner lower portion 7, and the side sill reinforcement portion 5.

[0022] As shown in Fig. 2, the upper portion 7a of the center pillar inner lower portion 7 has a through-hole 7c in the center when viewed from the vehicle width direction. The retractor 40 is installed in the pillar portion 2 via the through-hole 7c. Furthermore, as shown in Figs. 2 and 3, the first holding portion 31 of the bracket 30 that holds the retractor 40 and the first flat portion 31a of the bracket 30 on which the first holding portion 31 is provided are positioned so as to overlap with the through-hole 7c of the center pillar inner lower portion 7 when viewed from the vehicle width direction.

[0023] 2 to 4, an opening 7d that penetrates the center pillar inner lower 7 in the vehicle width direction is provided in the lower portion 7b of the center pillar inner lower 7 at a position where the bracket 30, the side sill inner 4, and the side sill reinforcement 5 overlap when viewed from the vehicle width direction. This opening 7d is formed to provide a first joint portion 51 (first welding point 51b) where the lower portion 30b of the bracket 30, the side sill reinforcement 5, and the side sill inner 4 are overlapped and joined by welding or the like, as will be described later with reference to FIG.

[0024] In addition, with respect to the portion of the lower portion 7b of the center pillar inner lower portion 7 where the opening 7d is not provided, as will be described later with reference to Figure 5, a second joint portion 52 (second welding point 52b) is provided in which the lower portion 7b of the center pillar inner lower portion 7 and the lower portion 30b of the bracket 30 are overlapped and joined by welding or the like.

[0025] The side sill inner 4 is a plate-like member that is disposed inside the bracket 30 in the vehicle width direction and extends in the vehicle vertical direction. The side sill inner 4 has an upper plate portion 4a that forms the upper part of the side sill inner 4 and extends in a substantially flat shape in the vertical direction, a lower plate portion 4b that forms the lower part of the side sill inner 4 and extends in a substantially flat shape in the vertical direction, and a bulging portion 4c that connects the upper plate portion 4a and the lower plate portion 4b and bulges inward in the vehicle width direction.

[0026] The side sill reinforcement 5 is a plate-like member that is disposed outside the center pillar inner lower 7 in the vehicle width direction and extends in the vehicle vertical direction. The side sill reinforcement 5 has an upper plate portion 5a that forms the upper part of the side sill reinforcement 5 and extends in a substantially flat shape in the vertical direction, a lower plate portion 5b that forms the lower part of the side sill reinforcement 5 and extends in a substantially flat shape in the vertical direction, and a bulging portion 5c that connects the upper plate portion 5a and the lower plate portion 5b and bulges outward in the vehicle width direction.

[0027] The upper plate portions 4a, 5a of the side sill inner 4 and the side sill reinforcement 5 constitute the upper flange of the side sill 3 and sandwich the lower portion 30b of the bracket 30 and the center pillar inner lower 7 from both sides in the vehicle width direction. Then, at the first joint portion 51, the upper plate portions 4a, 5a of the side sill inner 4 and the side sill reinforcement 5 and the lower portion 30b of the bracket 30 are joined in a stacked manner.

[0028] The lower plate portions 4b, 5b of the side sill inner 4 and the side sill reinforcement 5 constitute a lower flange of the side sill 3, and sandwich the center pillar inner lower 7 from both sides in the vehicle width direction.

[0029] The bulging portions 4c, 5c of the side sill inner 4 and the side sill reinforcement 5 bulge out in directions away from each other on both sides in the vehicle width direction, increasing the closed cross-sectional shape of the side sill 3 and enhancing rigidity.

[0030] Fig. 6A is a perspective view of the bracket 30 when attached to the vehicle body, as seen from the front and inside in the vehicle width direction. Fig. 6B is a side view of the bracket 30 when attached to the vehicle body, as seen from the inside in the vehicle width direction. Fig. 6C is a top view of the bracket 30 when attached to the vehicle body, as seen from above. Fig. 6D is a front view of the bracket 30 when attached to the vehicle body, as seen from the front side.

[0031] 2 to 6D, the bracket 30 is a plate-like member that extends substantially perpendicular to the vehicle width direction when attached. The bracket 30 has a shape in which the front-rear width is greatest at the lower portion 30b and narrows toward the upper portion 30a. By increasing the front-rear width of the lower portion 30b in this way, the area of ​​the lower portion 30b (third flat portion 33a) that is sandwiched and fixed from both sides in the vehicle width direction by the side sill reinforcement 5 and the side sill inner panel 4 is increased, making it possible to provide a bracket joint portion 50 consisting of a first joint portion 51 and a second joint portion 52 on the lower portion 30b (third flat portion 33a).

[0032] 2, the bracket 30 includes a first retaining portion 31 that retains the retractor 40 connected to one end 14a of the webbing 12, and a second retaining portion 32 that retains the lap pretensioner 20 connected to the other end 16a of the webbing 12. In this embodiment, the first retaining portion 31 is located forward and above the second retaining portion 32.

[0033] The lower portion 30b of the bracket 30 is sandwiched and fixed from both sides in the vehicle width direction between the upper plate portion 5a of the side sill reinforcement 5 and the upper plate portion 4a of the side sill inner 4. More specifically, the lower portion 30b of the bracket 30 is joined to the center pillar inner lower 7, the side sill inner 4, and the side sill reinforcement 5 by bracket joint portions 50 (first joint portion 51, second joint portion 52) while being sandwiched between the upper plate portion 5a of the side sill reinforcement 5 and the upper plate portion 4a of the side sill inner 4.

[0034] In this way, by holding the retractor 40 and the lap pretensioner 20 with the bracket 30, which is the same member, attachment accuracy is improved compared to when they are held with separate brackets, and occupant restraint performance and robustness can be enhanced. Also, because the lower part 30b of the bracket 30 is sandwiched and fixed between the side sill reinforcement 5 and the side sill inner panel 4, the load applied to the bracket 30 (for example, force during a vehicle collision) can be distributed and transmitted from both the front and back sides of the bracket 30 to the side sill reinforcement 5 and the side sill inner panel 4. Also, because the side sill reinforcement 5 and the side sill inner panel 4 are relatively thick and strong, support for the bracket 30 can be made even stronger.

[0035] As described above, the second retaining portion 32 of the bracket 30 is disposed further down the vehicle than the first retaining portion 31, and the bracket joint portion 50 (first joint portion 51, second joint portion 52) is disposed further down the vehicle than the second retaining portion 32. In this way, by positioning the bracket joint portion 50 at the lowest position and positioning the first and second retaining portions 31, 32 that hold the retractor 49 and lap pretensioner 20 connected to the webbing 12 at the upper position, handling of the webbing 12 becomes easier.

[0036] As shown in Figures 6A to 6D, bracket 30 has a plurality of planar portions 31a, 32a, 33a that are arranged offset in the vehicle width direction and parallel to each other, and curved portions 31c, 32c, 33c that are beads provided between adjacent planar portions 31a, 32a, 33a and curved in the vehicle width direction.

[0037] In this way, bracket 30 has multiple flat portions 31a, 32a, 33a and multiple curved portions 31c, 32c, 33c, which improves rigidity. Also, bracket 30 has multiple independent flat portions 31a, 32a, 33a whose area is divided, which reduces the size of each flat portion 31a, 32a, 33a, improving the surface precision of each flat portion 31a, 32a, 33a, and improving the surface precision of bracket 30 as a whole.

[0038] Each of the plurality of flat surfaces 31a, 32a, 33a has a generally planar shape generally perpendicular to the vehicle width direction. The plurality of flat surfaces 31a, 32a, 33a includes a first flat surface 31a on which the first retaining portion 31 (see FIG. 2) is provided, a second flat surface 32a located below the first flat surface 31a and on which the second retaining portion 32 (see FIG. 2) is provided, and a third flat surface 33a which is a lower portion 30b located below the second flat surface 32a and sandwiched and fixed between the upper plate portion 5a of the side sill reinforcement 5 and the upper plate portion 4a of the side sill inner 4 from both sides in the vehicle width direction.

[0039] The first retaining portion 31 is formed by a fastening member such as a bolt that passes through a first retaining portion hole 30c provided in the first flat portion 31a of the bracket 30 in the vehicle width direction. As shown in Fig. 2, the first retaining portion 31 is screwed into a hole (not shown) provided in the lower end portion of the retractor 40, and holds the lower end portion of the retractor 40.

[0040] The second retaining portion 32 is configured by a fastening member such as a bolt that passes through a second retaining portion hole 30d in the vehicle width direction, the second retaining portion hole 30d being provided in the second flat portion 32a of the bracket 30. As shown in Fig. 2, the second retaining portion 32 is threadedly engaged with a hole (not shown) provided in the rear end portion of the lap pretensioner 20, and holds the rear end portion of the lap pretensioner 20.

[0041] In the bracket 30 of this embodiment, the first flat portion 31a, the second flat portion 32a, and the third flat portion 33a are arranged in this order from above the vehicle. In addition, the second flat portion 32a, the first flat portion 31a, and the third flat portion 33a are arranged in this order from the inside in the vehicle width direction.

[0042] The positional relationship between the second flat surface portion 32a and the first flat surface portion 31a in the vehicle width direction is based on the positional relationship between the lap pretensioner 20 and the retractor 40 in the vehicle width direction. In other words, the lap pretensioner 20 is disposed on the inner side of the bracket 30 in the vehicle width direction, and the retractor 40 is disposed on the outer side of the bracket 30 in the vehicle width direction, so the second flat surface portion 32a on which the second retaining portion 32 that retains the lap pretensioner 20 is provided is disposed more inward in the vehicle width direction than the first flat surface portion 31a on which the first retaining portion 31 that retains the retractor 40 is provided. This makes it easy to fix the lap pretensioner 20 and the retractor 40 by the bracket 30.

[0043] As described above, the bracket 30 has a plurality of independent flat surfaces 31a, 32a, 33a with its area divided, which reduces the size of each of the flat surfaces 31a, 32a, 33a, resulting in excellent surface precision of each of the flat surfaces 31a, 32a, 33a. The first and second retaining portions 31, 32 that retain the retractor 40 and the lap pretensioner 20 are provided on the first and second flat surfaces 31a, 32a, which have excellent surface precision, and the third flat surface 33a, which has excellent surface precision, is sandwiched and fixed between the side sill reinforcement 5 and the side sill inner panel 4 from both sides in the vehicle width direction, thereby improving installation precision.

[0044] Furthermore, the first and second flat portions 31a, 32a, on which the first and second retaining portions 31, 32 are provided, are located on the same side (upper side) of the third flat portion 33a (lower portion 30b), on which the bracket joint portion 50 (first joint portion 51, second joint portion 52) is provided. Therefore, the load applied to the first and second retaining portions 31, 32 during a collision is on one side of the bracket joint portion 50 (first joint portion 51, second joint portion 52). Therefore, it is only necessary to increase the joint strength of the third flat portion 33a (lower portion 30b), on which the bracket joint portion 50 (first joint portion 51, second joint portion 52) is provided, resulting in a structure that is easy to reinforce. Furthermore, because the first to third flat portions 31a, 32a, 33a are configured as parallel surfaces, the load acting on the bracket 30 can be received in the high-strength direction (planar direction) of the bracket 30, resulting in a structure with high load-bearing capacity.

[0045] The multiple curved portions 31c, 32c, 33c include a first curved portion 31c and a second curved portion 32c formed between the first flat portion 31a and the second flat portion 32a in the vertical direction of the vehicle, and a third curved portion 33c formed between the second flat portion 32a and the third flat portion 33a in the vertical direction of the vehicle.

[0046] The first curved portion 31c defines the lower edge of the first flat portion 31a and extends in the vehicle longitudinal direction from the front end to the rear end of the bracket 30. The first curved portion 31c is a curved surface that curves inward in the vehicle width direction as it moves away from the lower edge of the first flat portion 31a. The first curved portion 31c also slopes downward as it moves toward the rear of the vehicle. The rear end of the first curved portion 31c connects to the rear end (upper end) of the second curved portion 32c.

[0047] The second curved portion 32c defines the upper edge of the second flat portion 32a, slopes downward as it extends forward from the rear end (upper end) of the second curved portion 32c, and its lower end connects to the third curved portion 33c. The second curved portion 32c is a curved surface that curves outward in the vehicle width direction as it moves away from the upper edge of the second flat portion 32a.

[0048] The third curved portion 33c defines the lower edge of the second flat portion 32a, the upper edge of the third flat portion 33a, and the lower edge of a flat surface 34 described below, and extends in the vehicle longitudinal direction from the front end to the rear end of the bracket 30.

[0049] In this way, because the first to third curved portions 31c, 32c, and 33c are all connected, as will be described later with reference to Fig. 7, stress generated on the first holding portion 31 side can be efficiently transmitted via the ridges of the first to third curved portions 31c, 32c, and 33c and received by the first joint portion 51 and the second joint portion 52, which have high strength. Furthermore, while the first curved portion 31c slopes downward toward the rear of the vehicle, the second curved portion 32c slopes downward toward the front of the vehicle, so that the connected two portions form a substantially V-shape, which can effectively increase the rigidity of the bracket 30 in the vertical direction. This can prevent deformation such as bending of the bracket 30.

[0050] The third curved portion 33c extends in the vehicle longitudinal direction and has a plurality of bent portions 33d that incline the direction of extension in the vehicle longitudinal direction toward the vehicle vertical direction and / or the vehicle width direction. In this embodiment, the third curved portion 33c has a pair of bent portions 33g, 33h that incline the upper ridge 33e and the lower ridge 33f of the third curved portion 33c extending in the vehicle longitudinal direction upward and outward in the vehicle direction.

[0051] In the illustrated example, the front bent portion 33g of the pair of bent portions 33g, 33h is provided at the same position as or slightly forward of the connection portion of the third bent portion 33c with the second bent portion 32c. The rear bent portion 33h of the pair of bent portions 33d is provided between the first joint portion 51 and the rearmost second joint portion 52 in the vehicle longitudinal direction, as shown in Figures 3 and 7.

[0052] In this way, the third curved portion 33c extending in the vehicle longitudinal direction has the plurality of bent portions 33h, which improves the rigidity of the third curved portion 33c, thereby preventing deformation due to resonance caused by vibrations while the vehicle is running, for example.

[0053] Furthermore, by providing the rear bent portion 33h, the upper ridge line 33e and the lower ridge line 33f of the third curved portion 33c are substantially perpendicular to a lap pretensioner side direction line EL2, which is an extension line in the load input direction from the lap pretensioner 20 side, as will be described later with reference to Figure 7. This prevents the bracket 30 from breaking when a collision input occurs.

[0054] The bracket 30 has a flat surface 34 between the first flat portion 31a and the third flat portion 33a in the up-down direction and in front of the second flat portion 32a. The flat surface 34 is located outward of the second flat portion 32a and inward of the first and third flat portions 31a, 33a in the vehicle width direction. The flat surface 34 is surrounded and defined by the first curved portion 31c, the second curved portion 32c, and the third curved portion 33c.

[0055] As described above, the lower portion 30b of the bracket 30 is fixed to the side sill 3 by being sandwiched from both sides in the vehicle width direction between the side sill reinforcement 5 and the side sill inner panel 4. Here, the lower portion 30b of the bracket 30 is joined to the center pillar inner lower 7, the side sill inner panel 4, and the side sill reinforcement 5 by bracket joints 50 (first joint 51, second joint 52) ​​while being sandwiched between the upper plate portion 5a of the side sill reinforcement 5 and the upper plate portion 4a of the side sill inner panel 4.

[0056] The bracket joint portion 50 includes a first joint portion 51 and a second joint portion 52 provided side by side in the vehicle front-rear direction on the lower portion 30b (third flat portion 33a) of the bracket 30.

[0057] 2 and 3, the first joint 51 and the second joint 52 are configured with a plurality of welding points 51b, 52b arranged side by side in the vehicle longitudinal direction. In this embodiment, the first joint 51 includes one first welding point 51b, and the second joint 52 includes three second welding points 52b.

[0058] The welding forms of the first welding point 51b and the second welding point 52b are different from each other. As shown in Fig. 4, the first welding point 51b is formed by welding together three pieces, namely, the lower part 30b (third flat portion 33a) of the bracket 30, the upper plate portion 5a of the side sill reinforcement 5, and the upper plate portion 4a of the side sill inner panel 4, in the vehicle width direction. As shown in Fig. 5, the second welding point 52b is formed by welding together two pieces, namely, the center pillar inner lower 7 and the lower part 30b of the bracket 30, in the vehicle width direction, between the upper plate portion 5a of the side sill reinforcement 5 and the upper plate portion 4a of the side sill inner 4.

[0059] As described above, the center pillar inner lower part 7 has, for example, a circular opening 7d that penetrates the center pillar inner lower part 7 in the vehicle width direction to provide the first joint portion 51 (first welding point 51b). As shown in Fig. 4, the upper plate portion 5a of the side sill reinforcement 5 enters the opening 7d and abuts against the lower portion 30b (third flat portion 33a) of the bracket 30. The first joint portion 51 is formed by welding together the lower portion 30b (third flat portion 33a) of the bracket 30, the upper plate portion 5a of the side sill reinforcement 5, and the upper plate portion 4a of the side sill inner panel 4.

[0060] In this way, the first joint portion 51 is formed by joining three pieces: the bracket 30, the side sill reinforcement 5, and the side sill inner panel 4, and can firmly fix the bracket 30. In particular, the side sill reinforcement 5 and the side sill inner panel 4 are usually thicker and stronger than the center pillar inner lower panel 7, so the bracket 30 can be supported more firmly.

[0061] Furthermore, the second joint 52, like the first joint 51, is provided on the lower part 30b of the bracket 30, so that the load during a collision, etc., can be distributed and transmitted not only to the side sill reinforcement 5 and the side sill inner 4 via the first joint 51, but also to the center pillar inner lower 7 via the second joint 52.

[0062] In addition, by forming an opening 7d that penetrates the center pillar inner lower 7 in the vehicle width direction, the bracket 30 can be directly joined to the side sill reinforcement 5 and the side sill inner 4 at the first joint portion 51 without being joined to the center pillar inner lower 7.

[0063] Furthermore, because the first joint portion 51 and the second joint portion 52 are provided along the vehicle fore-and-aft direction (bracket width direction), it is possible to form a wide bracket joint portion 50 that fixes the bracket 30. As a result, the fixing area of ​​the bracket 30 can be provided over a large area substantially across the entire width of the bracket 30, and a bracket holding structure that can withstand a high load can be provided.

[0064] Furthermore, the multiple welds 51b, 52b that make up the first joint 51 and the second joint 52 are arranged side by side in the vehicle longitudinal direction, and are arranged in a staggered pattern with adjacent welds in the vehicle longitudinal direction displaced in the vehicle vertical direction. This allows the area of ​​the bracket joint 50 provided on the lower part 30b of the bracket 30 to be expanded both longitudinally and vertically, thereby increasing the rigidity of the bracket 30. In particular, expanding the area of ​​the bracket joint 50 vertically increases the rigidity of the bracket 30 in the vertical direction, increasing the resistance to loads applied to the first retaining part 31 and the second retaining part 32 in the thickness direction (vehicle width direction) of the bracket 30, and making it possible to prevent deformation such as bending of the upper part of the bracket 30 in the vehicle width direction.

[0065] Next, the function of the bracket 30 when a load is generated will be described. Fig. 7 is a side view showing the direction of the load in the bracket holding structure. Although the first holding portion 31 and the second holding portion 32 are not shown in Fig. 7, the reference numerals of the first holding portion 31 and the second holding portion 32 are attached to the center positions of the first holding portion hole 30c and the second holding portion hole 30d where the first holding portion 31 and the second holding portion 32 are provided.

[0066] As shown in Figure 7, when a vehicle collision or the like occurs, a retractor-side load F40 is applied from the retractor 40 to the first retaining portion 31 in an upward and rearward direction of the vehicle along a retractor-lateral line EL1. The retractor-side load F40 can be decomposed into an upward load component F41 and a rearward load component F42. Furthermore, a lap-pretensioner-side load F20 is applied from the lap pretensioner 20 to the second retaining portion 32 in an upward and forward direction of the vehicle along a lap-pretensioner-lateral line EL2 that is aligned with the wire 20a. The lap-pretensioner-side load F20 can be decomposed into an upward load component F21 and a forward load component F22.

[0067] As described above, the direction of the retractor-side load F40 applied to the first retaining portion 31 and the direction of the lap pretensioner-side load F20 applied to the second retaining portion 32 intersect. The rearward load component F42 of the retractor-side load F40 and the forward load component F22 of the lap pretensioner-side load F20 cancel each other out as loads in opposite directions, with moments originating from the bracket joint 50 side, resulting in zero or an extremely small load in the vehicle longitudinal direction. As a result, the load component in the vehicle longitudinal direction is handled within the bracket 30. This simplifies the reinforcement structure by focusing on the remaining tensile direction toward the vehicle, other than the canceled direction, when designing the strength of the bracket 30. From the perspective of efficiently canceling out the load in the vehicle longitudinal direction, it is preferable to dispose the first retaining portion 31 and the second retaining portion 32 so that they are offset in the vehicle longitudinal direction, as in the illustrated example.

[0068] Furthermore, the stress generated by the load of the first holding portion 31 (input from the retractor 40) is, for example, a first bending portion stress f1 that acts to pull both front and rear ends of the first bending portion 31c, which is transmitted through the second bending portion 32c and becomes a second bending portion stress f2. The second bending portion stress is transmitted to the third bending portion 33c and becomes a third bending portion stress f3. The third bending portion stress f3 is further transmitted to the third flat portion 33a below, and is ultimately effectively borne by the bracket joint portion 50 (first joint portion 51, second joint portion 52), which is a high-strength portion.

[0069] Additionally, the first joint portion 51 is located on a lap pretensioner side direction line EL2, which is an extension line of the load input direction from the lap pretensioner 20 side. Therefore, the load from the lap pretensioner 20 can be reliably received by the first joint portion 51.

[0070] Additionally, the upper ridge line 33e and the lower ridge line 33f of the third curved portion 33c intersect the lap pretensioner side direction line EL2 so as to be substantially perpendicular to the lap pretensioner side direction line EL2. This makes the third curved portion 33c prone to elastic deformation in the stretching direction due to the load on the lap pretensioner side direction line EL2, thereby preventing breakage of the first joint portion 51 and its surroundings.

[0071] Although one embodiment of the present invention has been described above, the present invention can be modified as appropriate within the scope of its technical concept. For example, the shape of the bracket 30 is not limited to that shown in the drawings and can be modified as appropriate.

[0072] Furthermore, the first joint portion 51 and the second joint portion 52 in the above embodiment are described as being joined by welding, but this is not limiting, and they may also be joined by riveting, bolting, or the like.

[0073] As explained above, this specification describes at least the following items. Note that the elements in parentheses correspond to the above-mentioned aspects, but are not limited to these.

[0074] (1) A bracket (bracket 30) including a first retaining portion (first retaining portion 31) that retains a retractor (retractor 40) connected to one end (one end 14a) of a webbing (webbing 12) that restrains an occupant to a vehicle seat (vehicle seat 6), and a second retaining portion (second retaining portion 32) that retains a lap pretensioner (lap pretensioner 20) connected to the other end of the webbing; A side sill reinforcement (side sill reinforcement 5) provided on a side sill (side sill 3) of the vehicle body; A side sill inner that is adjacent to the side sill reinforcement in the vehicle width direction and is arranged more inward in the vehicle width direction than the side sill reinforcement; Equipped with The lower portion of the bracket (lower portion 30b) is sandwiched and fixed between the side sill reinforcement and the side sill inner from both sides in the vehicle width direction. Bracket holding structure.

[0075] According to (1), by holding the retractor and lap pretensioner with the same bracket, installation accuracy is improved compared to when they are held with separate brackets, and occupant restraint performance and robustness can be enhanced. Furthermore, the structure in which the lower part of the bracket is sandwiched and fixed between the side sill reinforcement and the side sill inner panel effectively distributes the load applied to the bracket (force during a vehicle collision) so that it is transmitted from both the front and back sides of the bracket to the side sill reinforcement and the side sill inner panel. As a result, the bracket can be supported more firmly. Furthermore, the side sill reinforcement and the side sill inner panel are relatively thick and strong, which further strengthens the bracket's support.

[0076] (2) The bracket holding structure described in (1) includes a first joint (first joint 51) where the lower part of the bracket, the side sill reinforcement, and the side sill inner are joined.

[0077] According to (2), the first joint is formed by joining three members: the bracket, the side sill reinforcement, and the side sill inner, so the bracket can be firmly fixed. In particular, the side sill reinforcement and the side sill inner are usually thick and strong, so the bracket can be supported more firmly.

[0078] (3) The bracket holding structure according to (2), wherein the first joint portion is located on an extension line (a line EL2 in the lap pretensioner side direction) from the lap pretensioner in the load input direction.

[0079] According to (3), the first joint portion is located on an extension line of the load input direction from the lap pretensioner, so that the load from the lap pretensioner can be reliably received by the first joint portion.

[0080] (4) a center pillar inner lower part (center pillar inner lower part 7) disposed between the side sill reinforcement and the side sill inner part in the vehicle width direction so as to be sandwiched together with the lower part of the bracket; a second joint portion (second joint portion 52) at which the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with A bracket holding structure according to any one of (1) to (3).

[0081] According to (4), since the second joint portion is provided where the lower part of the bracket and the inner lower center pillar are joined, the load during a collision can be distributed to the inner lower center pillar via the second joint portion. In addition, since the first joint portion and the second joint portion are both provided on the lower part of the bracket, the load can be concentrated on the lower part of the bracket.

[0082] (5) a center pillar inner lower section disposed between the side sill reinforcement and the side sill inner section in the vehicle width direction so as to be sandwiched together with the lower portion of the bracket; a second joint portion where the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with The center pillar inner lower section is provided with an opening (opening 7d) that penetrates the center pillar inner lower section in the vehicle width direction in order to provide the first joint portion. A bracket holding structure according to (2) or (3).

[0083] According to (5), an opening penetrating the center pillar inner lower in the vehicle width direction allows for the provision of a first joint portion that is directly connected to the side sill reinforcement and side sill inner without being joined to the center pillar inner lower. As a result, load can be distributed not only from the second joint portion that joins the bracket to the center pillar inner lower, but also from the first joint portion that directly joins the bracket to the thick and strong side sill reinforcement and side sill inner. As a result, a bracket holding structure that can withstand higher loads in a vehicle collision can be provided.

[0084] (6) The first joint portion and the second joint portion are arranged side by side in the vehicle front-rear direction. (5) A bracket holding structure as described above.

[0085] According to (6), the first and second joints are provided along the vehicle longitudinal direction (bracket width direction), so that the joint area for fixing the bracket can be formed widely. As a result, the fixing area of ​​the bracket can be made large in the bracket width direction, and a bracket holding structure that can withstand high loads can be provided.

[0086] (7) The first joint portion and the second joint portion are configured by a plurality of welding points (first welding points 51b, second welding points 52b) arranged side by side in the vehicle longitudinal direction, The plurality of welding points are arranged such that adjacent welding points in the vehicle longitudinal direction are shifted from each other in the vehicle vertical direction. A bracket holding structure according to (5) or (6).

[0087] According to (7), the first and second joints are configured with a plurality of welding points aligned in the vehicle longitudinal direction, thereby making it possible to enlarge the area of ​​the joint in the vehicle longitudinal direction, and furthermore, by arranging adjacent welding points with a positional offset in the vehicle vertical direction, it is possible to enlarge the area of ​​the joint in the vehicle vertical direction as well. As a result, the large joint area expanded in the vehicle longitudinal direction and vertical direction by the first and second joints results in a bracket holding structure that can withstand extremely high loads. In addition, by increasing the welding width in the vertical direction of the bracket, the rigidity of the bracket in the vertical direction is increased, and the resistance to loads applied to the first retaining portion and the second retaining portion in the bracket thickness direction is increased, preventing deformation such as bending of the upper part of the bracket in the vehicle width direction, for example.

[0088] (8) The second holding portion of the bracket is disposed on a lower side of the vehicle than the first holding portion of the bracket, The first joint portion is located below the second holding portion. A bracket holding structure according to any one of (2) and (5) to (7).

[0089] According to (8), by positioning the bracket joint at the lowest position and positioning the first and second holding portions that hold the retractor and lap pretensioner connected to the webbing at the upper position, it becomes easier to handle the webbing.

[0090] (9) The bracket is a plurality of planar portions that are arranged in a shifted manner in the vehicle width direction and are parallel to each other; a curved portion provided between adjacent planar portions and curved in the vehicle width direction; Equipped with A bracket holding structure according to any one of (1) to (8).

[0091] According to (9), the bracket has a curved portion with multiple parallel flat surfaces in the thickness direction, which improves its rigidity. Also, the bracket has multiple independent flat surfaces divided into multiple areas, which reduces the size of each flat surface, improving the surface precision of each flat surface and the overall surface precision of the bracket.

[0092] (10) The plurality of planar portions are a first flat surface portion (first flat surface portion 31a) on which the first holding portion is provided; a second flat surface portion (second flat surface portion 32a) located below the first flat surface portion on the vehicle and on which the second holding portion is provided; a third flat surface portion (33a) which is the lower portion and is located below the second flat surface portion of the vehicle and is sandwiched and fixed by the side sill reinforcement and the side sill inner from both sides in the vehicle width direction; Including, (9) A bracket holding structure as described above.

[0093] According to (10), the first and second holding portions for holding the retractor and the lap pretensioner are provided on the first and second flat portions with excellent surface precision, and the third flat portion with excellent surface precision is sandwiched and fixed between the side sill reinforcement and the side sill inner from both sides in the vehicle width direction, thereby improving installation precision. Furthermore, since the first and second flat portions on which the first and second retaining portions are provided are located on the same side (upper side) of the third flat portion of the bracket having the first joint portion, the load applied to the first and second retaining portions during a collision is on one side of the first joint portion. Therefore, it is only necessary to increase the joint strength of the third flat portion of the bracket on which the first joint portion is provided, resulting in a structure that is easy to reinforce. Furthermore, since the first to third flat portions are configured as parallel surfaces, the load acting on the bracket can be received in the bracket's high strength direction (planar direction), resulting in a structure with high load-bearing capacity.

[0094] (11) The curved portion is a first curved portion (first curved portion 31c) and a second curved portion (second curved portion 32c) formed between the first flat portion and the second flat portion in the vehicle up-down direction; a third curved portion (third curved portion 33c) formed between the second flat portion and the third flat portion in the vehicle up-down direction; Including, the first curved portion defines a lower edge of the first planar portion, extends in the vehicle front-rear direction, and is connected to the second curved portion; the second curved portion defines an upper edge of the second flat portion, inclines downward as it extends in the vehicle front-rear direction, and has a lower end connected to the third curved portion, The bracket holding structure according to (10), wherein the third curved portion extends in the vehicle longitudinal direction and defines a lower edge of the second flat portion and an upper edge of the third flat portion.

[0095] According to (11), since the curved portions that define the flat portions provided on the bracket are all connected to form a continuous configuration, the load from the retractor side of the first flat portion can be efficiently transmitted via the ridges of the curved portions and transmitted to the first and second joint portions. As a result, the load can be reliably received by the robust first and second joint portions. Furthermore, since the second curved portion extends so as to be inclined downward as it extends in the vehicle longitudinal direction, compared to the first and third curved portions which extend in the vehicle longitudinal direction, the rigidity of the bracket can be effectively increased.

[0096] (12) The third curved portion has a plurality of bent portions that incline the direction extending in the vehicle longitudinal direction toward the vehicle vertical direction and / or the vehicle width direction. (11) A bracket holding structure.

[0097] According to (12), the third curved portion extending in the vehicle longitudinal direction has a plurality of bent portions, which increases the rigidity of the third curved portion and the bracket, thereby preventing the bracket from being deformed. [Explanation of symbols]

[0098] 1. Body 1b Entrance gate 2 Pillar section 3 Side sill 4 Side sill inner 4a Upper plate 4b Lower plate part 4c bulge 5 Side sill reinforcement 5a Upper plate 5b Lower plate part 5c bulge 6 Vehicle seats 7 Center pillar inner lower 7a top 7b bottom 7c through hole 7d aperture 10 Seatbelt device 12 Webbing 14 Shoulder section 14a One end 16 Wrap section 16a Other end 20 Lap Pretensioner 20a wire 30 Bracket 30a upper 30b bottom 30c Hole for first holding part 30d Hole for second holding part 31 1st holding part 31a 1st plane part (plane part) 31c First curved section (curved section) 32 Second holding part 32a 2nd plane part (plane part) 32c Second curved section (curved section) 33a 3rd plane part (plane part) 33c Third curved section (curved section) 33e Upper ridge 33f Lower ridge 33g,33h bent part 40 Retractor 50 Bracket joint 51 First joint (welding point) 51b First welding point 52 Second joint (welding point) 52b Second welding point EL1 Retractor lateral direction line EL2 Lap pretensioner side direction line f1 First curved part stress f2 Second curved part stress f3 Third curved part stress

Claims

1. a bracket including a first holding portion that holds a retractor connected to one end of a webbing that restrains an occupant in a vehicle seat, and a second holding portion that holds a lap pretensioner connected to the other end of the webbing; A side sill reinforcement provided on a side sill of a vehicle body; A side sill inner that is adjacent to the side sill reinforcement in the vehicle width direction and is arranged more inward in the vehicle width direction than the side sill reinforcement; Equipped with The lower portion of the bracket is sandwiched and fixed between the side sill reinforcement and the side sill inner from both sides in the vehicle width direction, A first joint portion is provided where the lower portion of the bracket, the side sill reinforcement, and the side sill inner are joined together in three layers. Bracket holding structure.

2. the first joint portion is located on an extension line of the lap pretensioner in a load input direction. The bracket holding structure according to claim 1 .

3. a center pillar inner lower portion disposed between the side sill reinforcement and the side sill inner portion in the vehicle width direction so as to be sandwiched together with the lower portion of the bracket; a second joint portion where the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with The bracket holding structure according to claim 1 .

4. a center pillar inner lower portion disposed between the side sill reinforcement and the side sill inner portion in the vehicle width direction so as to be sandwiched together with the lower portion of the bracket; a second joint portion where the lower portion of the bracket and the center pillar inner lower section are joined; Equipped with an opening penetrating the center pillar inner lower section in a vehicle width direction is provided in the center pillar inner lower section to provide the first joint portion; The bracket holding structure according to claim 1 .

5. The first joint portion and the second joint portion are arranged side by side in the vehicle front-rear direction. The bracket holding structure according to claim 4.

6. the first joint portion and the second joint portion are configured by a plurality of welding points arranged side by side in a vehicle front-rear direction, The plurality of welding points are arranged such that adjacent welding points in the vehicle longitudinal direction are shifted from each other in the vehicle vertical direction. The bracket holding structure according to claim 4.

7. the second holding portion of the bracket is disposed on a lower side of the vehicle than the first holding portion of the bracket, The first joint portion is located below the second holding portion. The bracket holding structure according to claim 1 .

8. The bracket is a plurality of planar portions that are arranged in a shifted manner in the vehicle width direction and are parallel to each other; a curved portion provided between adjacent planar portions and curved in the vehicle width direction; Equipped with The bracket holding structure according to any one of claims 1 to 7.

9. The plurality of planar portions are a first flat portion on which the first holding portion is provided; a second flat surface portion located below the first flat surface portion on the vehicle and on which the second holding portion is provided; a third flat portion, which is the lower portion, located below the second flat portion and sandwiched and fixed by the side sill reinforcement and the side sill inner from both sides in the vehicle width direction; Including, The bracket holding structure according to claim 8.

10. The curved portion is a first curved portion and a second curved portion formed between the first flat portion and the second flat portion in the vehicle up-down direction; a third curved portion formed between the second flat surface portion and the third flat surface portion in the vehicle up-down direction; Including, the first curved portion defines a lower edge of the first planar portion, extends in the vehicle front-rear direction, and is connected to the second curved portion; the second curved portion defines an upper edge of the second flat portion, inclines downward as it extends in the vehicle front-rear direction, and has a lower end connected to the third curved portion, the third curved portion extends in the vehicle front-rear direction and defines a lower edge of the second planar portion and an upper edge of the third planar portion; The bracket holding structure according to claim 9.

11. The third curved portion has a plurality of bent portions that incline a direction extending in the vehicle front-rear direction toward the vehicle up-down direction and / or the vehicle width direction. The bracket holding structure according to claim 10.

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