Seat structure for vehicle

Abstract

This invention provides a vehicle seat structure that, when the seat back is supported by a support member, reduces the installation space of the seat mechanism compared to the conventional design. A rear panel (70) serves as a partition, separating the interior and exterior of the vehicle. The seat support (60) includes a support column (62) as a mounting element and seat crossbeams (64A, 64B) as support members. The support column (62) is mounted on the rear panel (70). The seat crossbeams (64A, 64B) are supported on the rear panel (70) via a gap (L1) separated by the support column (62). The back of the seat back (30) is supported on the seat crossbeams (64A, 64B). A path for webbing (51) to pass from the retractor (52) to the shoulder anchor (53) is formed in the gap (L1) between the seat crossbeams (64A, 64B) and the rear panel (70).

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Japanese Patent Application No. 2022-046441, filed on March 23, 2022, the entire contents of which, including the description, claims, drawings and abstract, are incorporated herein by reference. Technical Field

[0003] This specification discloses a vehicle seat and a seat structure for a vehicle equipped with a seatbelt mechanism. Background Technology

[0004] The vehicle seats include a seat cushion as the seat, a seat back as the backrest, and a headrest located above the seat back. For example, Japanese Patent Application Publication No. 2003-25891 discloses a seat back frame and a headrest frame integrally formed. The upper end of this seat back is supported on a vertical wall of the vehicle body (e.g., a partition wall of the passenger compartment) located behind it. The lower end of the seat back is supported on the passenger compartment floor.

[0005] In addition to the webbing that serves as the seatbelt, the seatbelt mechanism also includes a retractor, shoulder anchors, belt anchors, buckles, and a tongue. The retractor is located behind the seat back and winds up the webbing. The webbing pulled upwards from the retractor folds back at the shoulder anchor and is pulled forward towards the seat back. The lower end of the pulled-out webbing is then secured to the belt anchor. A tongue is inserted through the webbing; when the seatbelt mechanism is worn, the front end of the tongue inserts into the buckle.

[0006] However, to ensure the rigidity of the seat back, a support member with higher rigidity than the vehicle body panels (such as a grid-like frame) is sometimes installed, and the seat back is supported on this support member. Furthermore, in addition to the seat back, the seat belt mechanism is sometimes also mounted on the support member. In this case, in order to arrange the path of the webbing from the retractor to the shoulder anchor (the so-called belt path) behind the seat back, a gap needs to be provided between the back of the seat back and the support member. To ensure this gap, the installation space for the seat mechanism may need to be increased (volume increased).

[0007] Therefore, this specification discloses a vehicle seat mechanism that, when the seat back is supported by a support member, can reduce the installation space of the seat mechanism compared to the conventional method. Summary of the Invention

[0008] This specification discloses a vehicle seat structure. The seat structure includes a partition, a seat support, a seat back, a retractor, and a shoulder anchor. The partition is vertically installed, separating the interior and exterior of the vehicle. The seat support includes a mounting member and a support component. The mounting member is mounted to the partition. The support component is supported by the partition through a gap separated by the mounting member. The back of the seat back is supported by the support component. The retractor is supported by the partition and winds up the webbing of the seatbelt mechanism. The shoulder anchor is supported by the partition above the support portion of the retractor, through which the webbing passes. Furthermore, a path for the webbing to pass from the retractor to the shoulder anchor is formed in the gap between the support component and the partition.

[0009] According to the above structure, the retractor and shoulder anchor are installed in the partition, and the gap provided for installing the support member in the partition is used as the belt path, so there is no need to provide a gap for the belt path between the support member and the seat back.

[0010] Furthermore, in the above structure, the support member includes a seat crossbeam extending along the vehicle width direction. This seat crossbeam is positioned between the shoulder anchor and the retractor in the vehicle height direction, near the retractor. The seat crossbeam has a cap-shaped cross-section, consisting of a main body with a Π-shaped cross-section opening facing the partition, an upper flange extending upward from the upper end of the main body, and a lower flange extending downward from the lower end of the main body. Moreover, at the portion of the lower flange opposite the webbing passing through the webbing path, a curved portion is provided, bent in a manner that cuts off from both sides in the vehicle width direction of that portion and separates from the webbing.

[0011] Based on the above structure, contact between the webbing and the edge of the lower flange is suppressed, which results in the suppression of damage to the webbing.

[0012] According to the vehicle seat structure disclosed in this specification, when the seat back is supported by the support member, the installation space of the seat mechanism can be reduced compared to the past. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating a vehicle equipped with the seat structure described in this embodiment.

[0014] Figure 2 This is a perspective view illustrating the seat structure involved in this embodiment.

[0015] Figure 3 It means from Figure 2 A 3D view of an example with the seat removed.

[0016] Figure 4 This is a diagram illustrating the back structure of a seat back.

[0017] Figure 5 yes Figure 3The enlarged 3D view is an illustration of the seat support structure and seat belt mechanism.

[0018] Figure 6 yes Figure 5 AA sectional view.

[0019] Figure 7 This is a three-dimensional view illustrating the structure surrounding the take-up retractor. Detailed Implementation

[0020] The seat structure of the vehicle according to the embodiment will now be described using the accompanying drawings. The shapes, materials, quantities, and values ​​described below are illustrative and may be varied depending on the specifications of the seat structure. Furthermore, the same symbols will be used to denote equivalent elements in all the accompanying drawings.

[0021] In addition, Figures 1 to 7 In this system, an orthogonal coordinate system consisting of the FR axis, RW axis, and UP axis is used to represent the position and orientation of each structure. The FR axis is the vehicle's front-to-rear direction axis with the front of the vehicle as the positive direction. The RW axis is the vehicle's width direction axis with the right side of the vehicle as the positive direction. The UP axis is the vehicle's vertical direction axis with the top as the positive direction.

[0022] Figure 1 An example of the appearance of a vehicle 10 equipped with the seat structure according to this embodiment is shown. The vehicle 10 is, for example, a bus or other shared vehicle. For example, the seat structure of the vehicle according to this embodiment is applied to the seat 20 at the very end of the vehicle compartment. However, the seat structure of the vehicle according to this embodiment is not limited to the seat 20 at the very end of the vehicle compartment. As will be described later, the seat structure of the vehicle according to this embodiment can be applied as long as a support is provided in front of the vertically erected partition separating the interior and exterior of the vehicle compartment, and the seat back is supported by the support.

[0023] Figure 2 The illustration shows a seat 20 and a seatbelt mechanism 50 installed in the vehicle interior. The seat structure of the vehicle according to this embodiment, for example, in addition to the seat 20 and seatbelt mechanism 50, also includes a seat support 60 (see reference). Figure 5 ) and next door (in Figure 5 (70 examples are shown in the middle as the rear panel).

[0024] Reference Figure 2 At the very end of the vehicle compartment, there is, for example, a seat 20 with three seats. However, any number of seats 20 can be placed at the very end of the vehicle compartment, depending on the width of the vehicle compartment, the width of the seat 20, etc.

[0025] <Next door>

[0026] The carriage is divided by a partition separating the interior and exterior. Figure 2The rear panel 70 and floor panel 80 are shown as adjacent to each other. The floor panel 80 is the floor of the vehicle compartment, for example, a low-floor structure to allow wheelchairs to enter the vehicle 10.

[0027] The rear panel 70 is vertically positioned at the rear of the vehicle compartment. The lower end of the rear panel 70 is connected to the rear end of the floor panel 80. For example, the rear panel 70 may have a stepped structure, and the seat 20 may be installed together with this stepped structure.

[0028] The rear panel 70 includes a leg rest 71 and a backrest 73, which serve as upright mounting platforms. Additionally, the rear panel 70 includes a seat 72 and a top panel 74, which serve as horizontal mounting platforms. The lower end of the leg rest 71 is connected to the rear end of the floor panel 80 and is erected. The leg rest 71 is positioned opposite the legs of the passenger sitting on the seat 20.

[0029] Furthermore, vertical installation generally refers to an installation extending in the vertical direction, but it is not limited to this method. For example, the case where the installation angle is within the specified assembly tolerance is also included in the vertical installation method below. Additionally, curved surface machining can be applied locally to the board surface, or surface stiffeners with concave and convex machining can be applied to improve surface rigidity. Figures 1 to 7 To simplify the illustration, these processing structures have been omitted.

[0030] Reference Figure 2 , Figure 3 The seat plate 72 is located below the seat cushion 24. For example, the drive equipment of the vehicle 10, such as the transmission and rotary motor, is stored in the space below the seat plate 72 (outdoor space of the vehicle).

[0031] A support frame 44 is supported on the seat plate 72. The support frame 44 is a support component that extends along the front-rear direction of the vehicle. For example, the support frame 44 has a Π-shaped cross-section, and a pair is provided for each seat 20. As shown, the seat cushion 24 is supported on the support frame 44 via the seat cushion bracket 25.

[0032] The backrest 73 is an upright plate installed on the back of the seat back 30. The lower end of the backrest 73 is connected to the rear end of the seat plate 72. For example, a rear crossbeam 82, which serves as a frame component, is provided on the upper part of the back of the backrest 73 (exposed surface outside the vehicle) along the vehicle width direction. The rear crossbeam 82 is connected to pillars (not shown) provided on both sides of the vehicle 10 in the vehicle width direction.

[0033] A seat support body 60 for supporting the seat back 30 is installed on the back panel 73, and the seat back 30 is supported on the seat support body 60. The detailed structure of the seat support body 60 and the seat back 30 will be described later.

[0034] Reference Figure 5A headrest bracket 40 is supported on the upper part of the surface 73A (exposed surface inside the vehicle) of the back panel 73. Furthermore, a support rod 42 extends upward from the headrest bracket 40, and the lower end of the headrest 22 is connected to its upper end.

[0035] For example, the front surface of the headrest 22, which is the contact surface with the passenger, and the seat back 30 (see reference) Figure 2 The front surface of the headrest 22 is aligned. For example, the strut 42 is connected to the lower end of the rear surface of the headrest 22. In addition, the front-rear thickness of the headrest 22 is determined such that the distance from the strut 42 to the front surface of the headrest 22 is equal to or slightly shorter than the distance from the strut 42 to the front surface of the seat back 30.

[0036] By supporting the headrest 22 on the rear panel 70, which serves as a partition, rather than on the seat back 30, the support rigidity of the seat back 30 can be reduced. Thus, for example, as described later... Figure 4 In this way, the seat back 30 can be a simple structure consisting of the back panel 31 and the locking plate 34.

[0037] return Figure 5 The back panel 73 of the rear panel 70 supports a seat belt mechanism 50, which is part of the seat structure according to this embodiment. In addition to the webbing 51 that serves as the seat belt, the seat belt mechanism 50 also includes a retractor 52, a shoulder anchor 53, a belt anchor 54, a buckle 55, and a tongue plate 56. Their detailed structures will be described later.

[0038] <Seat support>

[0039] Reference Figure 3 , Figure 5 The seat support body 60 includes a support frame 44, support columns 62 (mounting parts), and seat crossbeams 64A and 64B (support components). These components are all made of rigid materials such as aluminum square bars. A grid-like support frame is erected in front of the back panel 73 of the rear panel 70 via the support columns 62 as longitudinal columns and the seat crossbeams 64A and 64B as transverse columns.

[0040] As described above, the support frame 44 is mounted on the seat plate 72 of the rear panel 70 and extends along the vehicle's longitudinal direction. The support frame 44 has a Π-shaped cross-section with its opening facing downwards. The support frame 44, for example, is located on the seat cushion 24 (see reference...). Figure 2 A pair is provided at the corresponding positions on both sides of the vehicle width direction.

[0041] Fastening holes 44A are provided in the side wall of the support frame 44 along its thickness direction (see reference). Figure 5 ). In the fastening hole 44A and seat bracket 25 (refer to Figure 2After the fastening holes (not shown) are aligned, the seat cushion bracket 25 is fastened to the support frame 44 by bolts and nuts. Thus, the seat cushion 24 is supported by the support frame 44.

[0042] Support column 62 is a mounting component installed on the back plate 73 of the rear panel 70, which serves as a partition. The upper end of support column 62 is supported, for example, on the rear crossbeam 82. For example, support column 62 and rear crossbeam 82 are joined by welding. Support column 62 is erected along the back plate 73. For example, support column 62 extends along the entire height of the back plate 73 (the full length of the UP axis dimension).

[0043] The support column 62 is, for example, a longitudinal column component with a cap-shaped cross-section, and its opening faces the back panel 73. In addition, multiple support columns 62 are provided along the vehicle width direction. For example, the support columns 62 are installed on the back panel 73 of the rear panel 70 in a manner that avoids the headrest bracket 40, shoulder anchor 53, and buckle 55.

[0044] Seat crossbeams 64A and 64B are horizontal column members extending along the vehicle width direction and serve as support members for the seat back 30. For example, seat crossbeams 64A and 64B extend along the entire width of the back panel 73 in the vehicle width direction. Seat crossbeams 64A and 64B are positioned between the shoulder anchor 53 and the retractor 52 in the vehicle height direction. Furthermore, seat crossbeams 64A and 64B are spaced apart along the vehicle height direction (vertically). For example, as... Figure 7 As illustrated by welding point 67B2, seat beams 64A and 64B are joined to support column 62 by welding.

[0045] Reference Figure 5 The seat crossbeams 64A and 64B are formed in a hat-shaped cross section. More specifically, the seat crossbeams 64A and 64B have main body portions 65A and 65B with a Π-shaped cross section. The openings of the main body portions 65A and 65B face the back panel 73, which serves as a partition. Furthermore, the seat crossbeams 64A and 64B have upper flanges 66A and 66B extending upward from the upper end of the main body portions 65A and 65B, and lower flanges 67A and 67B extending downward from the lower end of the main body portions 65A and 65B.

[0046] As described later, it is located on the seat back 30 (refer to...). Figure 4 The locking claws 32 on the back of the seat 64A 30B hook onto the upper flange 66A of the seat crossbeam 64A, which is positioned opposite above. Due to this hook-and-support structure, the seat crossbeam 64A (and seat crossbeam 64B) becomes a (floating) structure separated from the back panel 73 of the rear panel 70. In other words, the seat crossbeams 64A and 64B are separated by a gap L1 (see reference 64A) via support posts 62, which serve as mounting members. Figure 7 It is supported on the back plate 73.

[0047] That is, the support column 62 functions as a spacer that separates the seat crossbeams 64A and 64B from the back panel 73. From this point of view, the seat crossbeams 64A and 64B can also be supported on the back panel 73 of the rear panel 70 via a bracket that is a small piece, instead of the support column 62.

[0048] Furthermore, as described later, the gap L1 provided by the hook structure of the seat back 30 becomes a path for the webbing 51 to pass from the retractor 52 to the shoulder anchor 53. A bend 67B is provided on the lower flange 67B of the seat crossbeam 64B, located between and near the retractor 52, at a position opposite to the webbing 51 passing through the aforementioned path. By providing this bend 67B1, contact between the lower flange 67B and the webbing 51 is suppressed, preventing damage to the webbing 51 caused by the edge of the lower flange 67B. This detailed structure will be described later.

[0049] <Seating back>

[0050] Reference Figure 4 The seat back 30 includes, for example, a backrest portion 31 and a latching plate 34. As described above, the headrest 22 is supported by the rear panel 70 (see reference). Figure 5 Instead of being supported on the seat back 30, the support rigidity of the seat back 30 is reduced accordingly, and the structure becomes simpler.

[0051] For example, the seat back 30 is composed of two parts: a back panel 31 and a snap-fit ​​plate 34. The back panel 31 is, for example, made of resin, and has a structure with a specified elasticity on the surface 30A. For example, the back panel 31 may also have a rectangular frame and a mesh portion provided in the frame.

[0052] A latching plate 34 is provided on the backrest 30B of the seat back 30. The latching plate 34 is, for example, located in the upper portion of the backrest 30B of the seat back 30. The latching plate 34 is a plate member that extends substantially vertically from the backrest 30B of the seat back 30. Furthermore, a latching claw 32 is provided at the rear end of the latching plate 34. A pair of latching claws 32 are provided, for example, along the vehicle width direction. The latching plate 34 and the latching claws 32 are, for example, integrally formed.

[0053] For example, the vehicle's fore-and-aft dimension L5 of the card plate 34 is set as the seat crossbeams 64A and 64B (refer to...). Figure 5 , Figure 7 The front-to-rear dimension L4 or greater of the main body parts 65A and 65B of the seat beam 64A is such that the engaging claw 32 can be hooked onto the upper flange 66A of the seat beam 64A.

[0054] Additionally, refer to Figure 4A fastening hole 36 is provided in the center of the lower part of the back panel 31, extending from the surface 30A to the back surface 30B. After the engaging claw 32 hooks onto the upper flange 66A of the seat crossbeam 64A, the fastening hole 36 of the back panel 31 and the seat back bracket 68 (see reference) Figure 5 The fastening holes of the seat back 30 are aligned with the shaft, and the back panel 31 is then fastened to the seat back bracket 68 with bolts and nuts. As a result, the back side 30B of the seat back 30 is supported by the seat crossbeams 64A and 64B, which serve as support components.

[0055] <Seatbelt mechanism>

[0056] Reference Figure 5 The seat belt mechanism 50 includes a webbing 51, a retractor 52, a shoulder anchor 53, a belt anchor 54, a buckle 55, and a tongue 56. The webbing 51 is the seat belt, which is pulled up from the retractor 52 behind the seat back 30, folds back at the shoulder anchor 53, and extends towards the front surface and under the seat back 30, whereby its end is fixed to the belt anchor 54.

[0057] The retractor 52 winds up and stores the webbing 51. For example, the retractor 52 can be a known winding device with a locking mechanism. The retractor 52 is supported by a rear panel 70, which serves as a partition. See, for example, [reference needed]. Figure 2 , Figure 5 The retractor 52 is disposed between adjacent seats 20, 20. In addition, the retractor 52 is disposed below the seat crossbeam 64B.

[0058] The shoulder anchor 53 has a through hole 53A for the webbing 51 to pass through. The shoulder anchor 53 is supported on the rear panel 70 above the support portion of the retractor 52. For example, the shoulder anchor 53 is supported and fixed to the top plate 74 of the rear panel 70.

[0059] The strap anchor 54 is supported, for example, at the lower end of the back panel 73 of the rear panel 70. A tongue 56 is inserted into the webbing 51 such that it is positioned between the shoulder anchor 53 and the strap anchor 54. Additionally, a buckle 55 is supported on the back panel 73 of the rear panel 70 on the side opposite the strap anchor 54, across the seat 20.

[0060] The path for the webbing 51 to pass from the retractor 52 to the shoulder anchor 53 is provided in the gap L1 between the seat crossbeams 64A and 64B, which serve as support members, and the back panel 73, which serves as a partition.

[0061] Reference Figure 6For example, the gap L1 between the seat crossbeams 64A and 64B and the back panel 73 of the rear panel 70, the spacing L2 between the through hole 53A of the shoulder anchor 53 and the back panel 73, and the spacing L3 between the outer peripheral surface 52A1 of the winding roller 52A of the retractor and the back panel 73 have the relationship L1 > L3 > L2.

[0062] By making the gap L1 greater than both the interval distances L2 and L3, the webbing path of the webbing 51 from the retractor 52 to the shoulder anchor 53 is ensured to be within the gap L1. Additionally, by making the interval distance L2 less than the interval distance L3, as... Figure 6 , Figure 7 As illustrated, the lower end of the webbing 51, i.e. the portion around the retractor 52, is wound around the seat crossbeam 64B.

[0063] Therefore, in the seat structure according to this embodiment, a curved portion 67B1 is provided on the lower flange 67B of the seat crossbeam 64B (see reference). Figure 7 A bend 67B1 is provided at the portion of the lower flange 67B opposite to the webbing 51. The bend 67B1 is cut off from both sides in the width direction and bends in a manner that separates it from the webbing 51. Assuming that the webbing 51 moves erratically when wound to the take-up unit 52, the width dimension of the bend 67B1 is, for example, set to be more than twice the width dimension of the webbing 51.

[0064] This disclosure is not limited to the above-described embodiments, but includes all changes and modifications without departing from the technical scope or essence of the invention as defined by the claims.

Claims

1. A seat structure of a vehicle, comprising: a partition wall erected to separate an inside and an outside of a cabin; a seat support body having a mounting member mounted to the partition wall and a support member supported to the partition wall with a gap via the mounting member; a seat back supported to the support member with a back surface; a retractor supported to the partition wall and windingly accommodating a webbing of a safety belt mechanism; and a shoulder anchor supported to the partition wall at a position higher than a support position of the retractor for the webbing to be threaded therethrough, wherein the gap between the support member and the partition wall forms a belt path through which the webbing passes from the retractor to the shoulder anchor, wherein the support member includes a seat cross beam extending in a vehicle width direction, the seat cross beam being disposed between the shoulder anchor and the retractor in a vehicle height direction and at a position closer to the retractor among the shoulder anchor and the retractor, wherein the seat cross beam has a main body portion having a Π-shaped cross section with an opening facing the partition wall, an upper flange extending upward from an upper end of the main body portion, and a lower flange extending downward from a lower end of the main body portion, and wherein a bent portion is provided at a position of the lower flange opposite to the webbing passing through the belt path, the bent portion being bent to be separated from both sides of the position in the vehicle width direction and to be separated from the webbing. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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