WO2020017401A1 - Vehicle seat support structure - Google Patents

Vehicle seat support structure Download PDF

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Publication number
WO2020017401A1
WO2020017401A1 PCT/JP2019/027221 JP2019027221W WO2020017401A1 WO 2020017401 A1 WO2020017401 A1 WO 2020017401A1 JP 2019027221 W JP2019027221 W JP 2019027221W WO 2020017401 A1 WO2020017401 A1 WO 2020017401A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
seat back
support structure
seat
shaft
Prior art date
Application number
PCT/JP2019/027221
Other languages
French (fr)
Japanese (ja)
Inventor
清 竹林
輝三 朝居
Original Assignee
デルタ工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デルタ工業株式会社 filed Critical デルタ工業株式会社
Publication of WO2020017401A1 publication Critical patent/WO2020017401A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/005—Arrangement or mounting of seats in vehicles, e.g. dismountable auxiliary seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/32—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use

Definitions

  • the present invention relates to a structure for supporting a vehicle seat such as an automobile, particularly, a vehicle seat suitable for a rear seat.
  • Vehicle rear seats which include a seat cushion and a seat back, and in which the luggage compartment can be expanded by tilting the seat back forward so as to be folded on the seat cushion.
  • Patent Document 1 is disclosed as an example of this type of rear seat.
  • the rear seat disclosed in Patent Document 1 is provided with a pair of left and right seatbacks that can be folded and split.
  • the left and right seatbacks are each supported by a vehicle body side pin fixed to a wheel house frame so as to protrude into the vehicle interior and a fixture fixed to a central portion of the vehicle body floor so as to be tiltable (swingable).
  • a through hole is formed in a side portion of the seat back frame on the vehicle outside (door side), and a vehicle body side pin is inserted into the through hole.
  • a seat-side pin is provided on a side portion of the seat back frame on the vehicle inner side (center side), and the seat-side pin is supported by a mounting tool.
  • a cylindrical resin cap is inserted into the through hole, and the vehicle body side pin is inserted accurately inside the resin cap (referred to as a mounting hole).
  • the outer peripheral surface of the resin cap has a cross-section having tapered surfaces formed on both sides in the width direction (both sides in the axial direction). This allows the resin cap to swing with respect to the side surface portion (through hole) of the seat back frame. Therefore, when assembling the seat back to the vehicle body, by tilting the resin cap with respect to the seat back frame, that is, by tilting the mounting hole, the seat back is tilted with respect to the vehicle body side pin.
  • Patent Document 1 describes that a vehicle body side pin can be inserted into a through hole (mounting hole) of a seat back frame, thereby simplifying an operation of assembling a seat back to a vehicle body.
  • the outer peripheral surface of the resin cap has a mountain shape, and the outer peripheral surface of the resin cap and the inner peripheral surface of the through hole are in a state close to line contact. Has become. For this reason, there is a possibility that the resin cap is deformed so as to crush the outer peripheral ridges due to the load of the occupant or the like. Such a deformation forms a gap between the resin cap and the inner peripheral surface of the through-hole in which the resin cap is inserted, causing rattling of the seat back, which is one of the factors that hinder ride comfort.
  • the present invention has been made in view of the above circumstances, and can improve the workability of assembling a seatback to a vehicle body without inducing rattling of the seatback. It is an object of the present invention to provide a support structure.
  • the present invention is a vehicle seat support structure having a retractable seat back, comprising: a shaft fixed to a vehicle body and extending in a vehicle width direction; and a vehicle provided on a side surface of the seat back.
  • a spherical body having a mounting hole extending in the width direction, and a holding portion having a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body and holding the spherical body so as to roll on the receiving surface,
  • the seat back is supported by the shaft body inserted into the mounting hole so as to be swingable in the front-rear direction with respect to the vehicle body with the shaft body as a fulcrum.
  • FIG. 1 is a perspective view of a vehicle seat (rear seat) according to an embodiment of the present invention.
  • FIG. 2A is a front view of a seat back frame, showing a support structure of a seat back of a vehicle seat.
  • FIG. 2B is a side view of the seat back frame, showing the support structure of the seat back of the vehicle seat.
  • FIG. 3 is a side view showing a support structure on the vehicle outside of the seat back frame.
  • FIG. 4 is an exploded perspective view showing a support structure on the vehicle outside of the seat back frame.
  • FIG. 5 is a cross-sectional view (a cross-sectional view taken along line VV in FIG. 3) showing a support structure of the seat back frame on the vehicle outside.
  • FIG. 6 is a perspective view illustrating a support structure of the seat back frame on the vehicle interior side.
  • FIG. 7 is an exploded perspective view for explaining a support structure on the vehicle inner side of the seat back frame.
  • FIG. 8 is an explanatory diagram illustrating a procedure for assembling the seat back to the vehicle body.
  • FIG. 9 is a cross-sectional view of the seat back frame showing the relationship between the spherical body (mounting hole) and the pin.
  • FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention.
  • the vehicle seat 1 shown in FIG. 1 is a rear seat used as a rear seat of the vehicle, and corresponds to a rear seat of a vehicle having two front and rear rows or a third row of a vehicle having three front and rear rows. Is what you do.
  • the vehicle seat 1 is a so-called splittable seat that can split and tilt the seatback.
  • the vehicle seat 1 includes a seat cushion 2 extending in a vehicle width direction, a left seat back 3 provided corresponding to a left area of the seat cushion 2,
  • the seat cushion 2 includes a right seat back 4 provided corresponding to a right region of the seat cushion 2, and headrests 3a, 4a provided in the right and left seat backs 3, 4, respectively.
  • the left seat back 3 and the right seat back 4 can be individually tilted in the front-rear direction, and are tilted forward so as to be folded on the seat cushion 2 as shown by a two-dot chain line in FIG.
  • the luggage space can be expanded.
  • the ratio of the left seat back 3 to the right seat back 4 in the vehicle width direction is 5: 5 in this example. However, this ratio is not limited to 5: 5, but may be 6: 4 or the like.
  • the seat cushion 2 of the vehicle seat 1 is fixedly supported by the floor 7 of the vehicle body.
  • the left seat back 3 and the right seat back 4 are respectively supported over a floor portion 7 of the vehicle body and an inner wall portion 6 of the vehicle body such as a wheel house frame.
  • FIG. 2A is a front view of the seat back frame 10 showing a support structure of the left seat back 3 of the vehicle seat 1
  • FIG. 2B is a side view of the seat back frame 10 showing the support structure.
  • the left seat back 3 includes a seat back frame 10 shown in FIGS. 2A and 2B, a seat back pad (not shown) attached to the seat back frame 10, a seat cover (not shown) that covers the seat back pad from the outside, and the like. It is configured.
  • the seat back frame 10 is a skeleton of the left seat back 3 formed by joining a plurality of metal members such as pipe members, and has a substantially rectangular shape in a front view.
  • a portion of the side portion 12 on the vehicle outside (left side) of the seat back frame 10 below the central portion in the vertical direction is located on the vehicle inside ( It is offset to the center in the vehicle width direction).
  • a holding portion 12a holding the spherical body 22 is provided near the lower end of the side portion 12 on the vehicle outside of the seat back frame 10.
  • a pin 6a (corresponding to a first shaft of the present invention) fixed to the inner wall 6 is inserted into a mounting hole 24 (see FIG. 5) provided in the spherical body 22.
  • the side portion 12 on the vehicle outside of the seat back frame 10 is supported by the pin 6a so as to be able to tilt (swing) in the front-rear direction.
  • FIGS. 3 to 5 show the supporting structure of the side portion 12 on the vehicle outside of the seat back frame 10 in detail.
  • 3 is a side view
  • FIG. 4 is an exploded perspective view
  • FIG. 5 is a cross-sectional view (a cross-sectional view taken along the line VV in FIG. 3) showing the support structure.
  • the side portion 12 on the vehicle exterior side of the seat back frame 10 has a bracket 20 made of a metal plate having a U-shaped cross section and a retainer 40 fixed to the bracket.
  • the bracket 20 has a circular opening 30 penetrating in the vehicle width direction.
  • the opening 30 is formed by, for example, burring, and an annular rising portion 32 that rises toward the inside (rightward) of the vehicle is formed around the opening 30.
  • the inner peripheral surface of the opening 30, that is, the inner peripheral surface 32 a of the rising portion 32 has a maximum inner diameter at the position of the outer side surface of the bracket 20 (left side surface / joining surface Fa of the retainer 40 described later), and the inner side of the vehicle ( It is tapered so that the inner diameter gradually decreases toward the right (in the right direction), specifically, an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22.
  • the spherical body 22 is inserted into the opening 30 from the vehicle outside (left side) of the bracket 20, and the retainer 40 is fixed to the vehicle exterior side surface (left side surface) of the bracket 20 from outside the spherical body 22. .
  • the retainer 40 is a metal plate-shaped member having a circular opening 42 penetrating in the vehicle width direction at the center.
  • the opening 42 is formed by, for example, burring, similarly to the opening 30 of the bracket 20, and an annular rising portion 44 that rises toward the vehicle outside (left side) is formed around the opening 42.
  • the inner peripheral surface of the opening 42 of the retainer 40 that is, the inner peripheral surface 44 a of the rising portion 44 is formed symmetrically with the inner peripheral surface 32 a of the rising portion 32 of the bracket 20.
  • the inner peripheral surface 44a is spherical in detail so that the inner diameter is maximized at the position of the joint surface Fa with the bracket 20 in the vehicle width direction and the inner diameter gradually decreases toward the outer side (left side) of the vehicle. It is tapered so as to have an arc-shaped cross section corresponding to the outer peripheral surface of the body 22.
  • the retainer 40 is integrally fixed to the bracket 20 with the spherical body 22 received in the opening 42. Specifically, the rivet R1 is inserted from the inside of the bracket 20 (right side) to the through hole 34 of the bracket 20 and the through hole 46 of the retainer 40, and is outside the retainer 40 (outside left). By caulking, the retainer 40 is fixed to the bracket 20. Thereby, the spherical body 22 is inserted into the inside of the rising part 32 of the bracket 20 and the inside of the rising part 44 of the retainer 40, and the spherical body 22 is prevented from falling in the vehicle width direction by the rising parts 32, 44. In this state, the spherical body 22 is held on the side portion 12 on the vehicle outside (left side) of the seat back frame 10.
  • the inner peripheral surface 32a of the rising portion 32 of the bracket 20 and the inner peripheral surface 44a of the rising portion 44 of the retainer 40 have an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22 as described above. Therefore, the spherical body 22 can roll with respect to the side surface part 12 of the seat back frame 10. That is, the holding portion 12 a is constituted by the rising portion 32 of the bracket 20 and the rising portion 44 of the retainer 40, and the holding portion 12 a has a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22. Then, the spherical body 22 is rotatably held by the receiving surface.
  • the spherical body 22 is integrally formed of a resin material such as a POM (polyacetal resin) material or a material having excellent strength and durability such as an oil-impregnated sintered metal.
  • the spherical body 22 is provided with a plurality of concave portions on its surface, so that the sliding resistance between the rising portions 32 and 44 and the inner peripheral surfaces 32a and 44a of the rising portions 32 and 44 is reduced while maintaining strength and durability. It is configured.
  • the spherical body 22 has a mounting hole 24 at the center thereof, which penetrates in the vehicle width direction.
  • the pin 6a extends straight (without leaning back and forth) and horizontally from the inner wall portion 6 of the vehicle body in the vehicle width direction.
  • the spherical body 22 has an annular boss 26 along each opening edge of the mounting hole 24.
  • the bosses 26 are configured such that the tip 32b of the rising portion 32 of the bracket 20 (corresponding to the regulating portion of the present invention) and the tip 44b of the rising portion 44 of the retainer 40 (the present invention). (Corresponding to the regulating portion).
  • the inclination angle (rolling range) of the spherical body 22 is regulated within a certain range.
  • the inclination angle of the spherical body 22 is regulated so that the angle ⁇ between the central axis Ax1 of the mounting hole 24 and the central axis Ax2 of the pin 6a does not exceed 30 ° (FIG. 9). reference).
  • the spherical body 22 is allowed to be inclined when the angle ⁇ is in the range of 0 ° to 30 °.
  • FIGS. 6 and 7 show the support structure of the side portion 13 on the vehicle interior (right side) of the seat back frame 10 in detail.
  • FIG. 6 is a perspective view
  • FIG. 7 is an exploded perspective view, each showing the support structure.
  • the side portion 13 on the vehicle interior side of the seat back frame 10 has a bracket 50 made of a metal plate.
  • the bracket 50 is provided with a pin 52 (corresponding to a second shaft body of the present invention) extending inward (rightward) of the vehicle.
  • the pin 52 is supported by a support member 60 provided on the floor 7 of the vehicle body.
  • the side surface portion 13 on the vehicle interior side of the seat back frame 10 is supported by the support member 60 so as to be able to tilt (swing) in the front-rear direction.
  • the support member 60 includes a plate-shaped base portion 62 fixed to the floor portion 7 by bolts or the like (not shown), a pin support portion 64 erected at the center of the base portion 62, and fixed to the pin support portion 64. And a cover member 66 to be formed.
  • the portion of the support member 60 other than the cover member 66 is integrally formed of a metal material.
  • the pin support 64 includes a pair of pin support plates 64a (corresponding to the support of the present invention) facing each other at a predetermined interval in the vehicle width direction.
  • the pin support plates 64a support the pins 52
  • the left pin support plate 64a supports the pins 52 of the left seat back 3
  • the right pin support plate 64a supports the pins of the right seat back 4. 52 is supported.
  • the pin support plate 64a is provided with bearings 65 formed of U-shaped cutouts that open upward and are viewed from the side, and the bearings 65 support the pins 52. More specifically, a peripheral groove 52a having a groove width slightly larger than the thickness of the pin support plate 64a is formed in the pin 52.
  • the pin 52 is supported by the bearing 65 with a pin support plate 64a interposed in the circumferential groove 52a. Thus, the pin 52 is rotatably supported by the bearing 65 in a state where the displacement in the vehicle width direction is restricted.
  • the cover member 66 is a box-shaped member made of, for example, resin and has an opening at the bottom, and is fixed to the upper end portion of the pin support portion 64 so that each pin support plate 64a (bearing portion 65) as shown in FIG. ), The pins 52 of the left and right seatbacks 3 and 4 are integrally covered from above. This prevents the pins 52 of the respective seatbacks 3 and 4 from unintentionally falling off the bearing 65.
  • the cover member 66 is detachably fixed to the pin support 64 by bolts B1. In FIG. 2A, the right seat back 4 is omitted.
  • the support structure of the left seat back 3 of the vehicle seat 1 has been described in detail here, the support structure of the right seat back 4 is also symmetrical left and right (that is, the right side of the right seat back 4 is on the outside of the vehicle). And the left side is the side portion 13 on the inside of the vehicle), and is basically the same as the left seat back 3. Therefore, a detailed description of the support structure of the right seat back 4 is omitted.
  • FIG. 8 is an explanatory diagram illustrating a procedure for assembling the left seat back 3 to the vehicle body.
  • Sections (a) to (c) of FIG. 8 are sectional views corresponding to the section taken along line VIII-VIII of FIG.
  • the left seat back 3 To incorporate the left seat back 3 into the vehicle body, first, it is necessary to insert a pin 6 a protruding from the inner wall portion 6 of the vehicle body into the mounting hole 24 of the spherical body 22. In this case, when the pin 6a is inserted into the mounting hole 24 along the vehicle width direction, the pin support portion 64 of the support member 60 and the left seat back 3 interfere. Therefore, as shown in section (a) of FIG. 8, the left seat back 3 is inclined such that the side portion 13 on the inside of the vehicle is located behind the side portion 12 on the outside of the vehicle. The pin 6a is inserted into the mounting hole 24 by moving the pin 6a to the outside (left side) of the vehicle.
  • the spherical body 22 is rotatably held on the side surface portion 12, even if the center axis Ax1 of the mounting hole 24 and the center axis Ax2 of the pin 6a are not parallel as shown in FIG. If the front end of 6a abuts against the entrance of the mounting hole 24 and the left seat back 3 is pressed to the left in this state, the center axis Ax1 of the mounting hole 24 and the center axis Ax2 of the pin 6a naturally coincide with each other. The spherical body 22 rolls.
  • the pin 6a is inserted into the mounting hole 24. That is, the pin 6a can be inserted into the mounting hole 24 with the left seat back 3 inclined with respect to the pin 6a.
  • a tapered tapered portion 70 is provided at the tip of the pin 6a, and the tapered portion 24a is provided on the inner peripheral surface of the entrance portion of the mounting hole 24 as described above. It can be inserted smoothly while guiding to.
  • the side surface portion 13 on the vehicle interior side of the left seat back 3 is moved forward as shown in section (b) of FIG.
  • the pin 52 provided on the side surface portion 13 is supported by the pin support portion 64 of the support member 60.
  • the pin 52 is supported by the bearing 65 such that the pin support plate 64a is interposed in the circumferential groove 52a of the pin 52.
  • the left seat back 3 has been described, but the right seat back 4 can be incorporated into the vehicle body in the same procedure as the left seat back 3 except that the left and right sides are different.
  • the cover member 66 is attached and fixed to the pin support portion 64 of the support member 60. This completes the work of attaching the seat backs 3 and 4 to the vehicle body.
  • the seatbacks 3 and 4 are tilted such that the side portion 13 on the inside of the vehicle is located behind the side portion 12 on the outside of the vehicle.
  • the seatbacks 3 and 4 are tilted up and down so that the side portion 13 on the inside of the vehicle is located above the side portion 12 on the outside of the vehicle. , 4 may be avoided.
  • the position of the support member may be provided further inside the vehicle (center side in the vehicle width direction) so that the seat back does not interfere with the support member of the floor portion. Conceivable. That is, it is conceivable that the seatback pin is placed on the support member inside the vehicle and the seatback is moved outward to insert the bearing bush of the seatback into the pin fixed to the inner wall of the vehicle body.
  • play is required in the vehicle width direction by the amount of movement in order to position the seat back at the final assembly position.
  • the play in the width direction of the seat corresponding to the moving amount is not required, and the seat back can be easily positioned inside the vehicle. Therefore, for example, it is also possible to suppress the variation in the position between the left and right seatbacks, to improve the appearance and to stabilize the forward leaning operation.
  • the receiving surface of the holding portion 12 a that holds the spherical body 22 (that is, the inner peripheral surface 32 a of the rising portion 32 of the bracket 20 and the inner peripheral surface 44 a of the rising portion 44 of the retainer 40) is formed on the outer peripheral surface of the spherical body 22. It is formed in a corresponding arc-shaped cross section. Therefore, even if a load of an occupant or the like acts, the load is easily dispersed, and the spherical body 22 is unlikely to be deformed. Therefore, the spherical body 22 is deformed and a gap is formed between the receiving surface (the inner peripheral surfaces 32a and 44a) of the holding portion 12a, whereby rattling of the seatbacks 3 and 4 is effectively suppressed. You.
  • a boss 26 is formed on the spherical body 22, and the boss 26 is engaged with the holding part 12 a (ie, the rising part 32 of the bracket 20 and the rising part 44 of the retainer 40), so that the spherical body 22 is formed.
  • Rolling range is regulated. Therefore, while the range of the inclination angle of the mounting hole 24 is relatively large, the mounting hole 24 is reliably prevented from being unintentionally hidden by the holding portion 12a.
  • a pin 52 is provided on the inner side surface portion 13 of each of the seat backs 3 and 4, and the pin 52 is connected to a support member 60 (pin support plate 64a) fixed to the floor portion 7. ) Is supported by the bearing 65.
  • a peripheral groove 52a is formed in the pin 52, and the pin 52 is supported by the bearing portion 65 in a state in which a pin support plate 64a is interposed in the peripheral groove 52a, thereby restricting axial displacement. . Therefore, according to the support structure of the vehicle seat 1, although the side surfaces 12 on the vehicle outside of the seat backs 3, 4 are supported by the pins 6a inserted into the mounting holes 24, the seat back 3, 4 4 can be appropriately positioned at a specific position in the vehicle width direction. That is, the seat backs 3, 4 are prevented from rattling in the vehicle width direction.
  • the support structure of the vehicle seat 1 described above is an example of a preferred embodiment of the support structure of the vehicle seat according to the present invention, and the specific structure of the vehicle seat 1 and the specific structure of the vehicle seat 1 are described.
  • the general support structure can be appropriately changed without departing from the gist of the present invention. For example, the following embodiment may be adopted.
  • the holding part 12 a that holds the spherical body 22 so as to rollably includes the rising part 32 of the bracket 20 and the rising part 44 of the retainer 40, which constitute the side part 12 of the seat back frame 10.
  • the configuration of the holding unit 12a is not limited to this.
  • the holding portion 12a may be a member provided separately from the bracket 20 so as to rollably hold the spherical body 22, and may be configured by a member assembled to the bracket 20 together with the spherical body 22. .
  • the peripheral groove 52a is provided in the pin 52 that supports the side portion 13 (bracket 50) on the vehicle interior side of the seatbacks 3 and 4, and the pin supporting plate 64a is interposed in the peripheral groove 52a.
  • the structure for regulating the axial displacement of the pin 52 is not limited to this.
  • a portion (engaging portion) that protrudes radially outward such as a flange portion is provided on the pin 52, and a portion that sandwiches the protruding portion from both sides in the vehicle width direction is provided on the pin support portion 64 of the support member 60, so that May be restricted in the axial direction.
  • the pin 52 provided on the side portion 13 (bracket 50) inside the vehicle of the seat back 3 is supported by the pin support portion 64 of the support member 60 fixed to the floor portion 7.
  • the reverse structure may be adopted. That is, a support member having a pin extending in the vehicle width direction is arranged on the floor portion 7 side, and a supported portion having a cutout portion for receiving the pin is provided on the side surface portion 13 of the seat back 3. Thereby, the left seat back 3 may be supported by the pin so as to be able to tilt (swing).
  • the present invention is a support structure for a vehicle seat having a retractable seat back, comprising: a shaft fixed to a vehicle body and extending in a vehicle width direction; A spherical body having a mounting hole extending in the direction, and a holding portion having a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body, and holding the spherical body so as to roll on the receiving surface.
  • the seatback is supported by the shaft body inserted into the mounting hole so as to be swingable in the front-rear direction with respect to the vehicle body with the shaft body serving as a fulcrum.
  • the shaft body fixed to the vehicle body and extending in the vehicle width direction refers to both the case where the shaft body is directly fixed to the vehicle body and the case where the shaft body is fixed via a member such as a bracket. Including.
  • the side surface of the seat back is supported by a shaft fixed to the vehicle body.
  • the shaft is inserted into a mounting hole provided in a spherical body that is rollably held on the side surface of the seat back. Therefore, the allowable range of the inclination angle of the mounting hole is relatively large. Therefore, when the seatback is incorporated into the vehicle body, the shaft body can be inserted into the mounting hole with the seatback tilted further.
  • the spherical body is received by the receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface, even if a load of the occupant or the like is applied, the load is easily dispersed, and therefore, the spherical body is unlikely to be deformed (severed). Therefore, it is possible to effectively suppress a gap from being formed between the spherical body and the holding portion (receiving surface) and causing rattling of the seat back.
  • the spherical body includes a boss formed along an opening edge of the mounting hole, and the holding portion engages with the boss to define a rolling range of the spherical body. It is preferable to provide a regulating unit for regulating.
  • an inner peripheral surface of an end portion of the mounting hole which is an entrance side of the shaft body, has a tapered portion whose inner diameter decreases from the outside to the inside of the mounting hole. Is preferably provided.
  • the tip of the shaft body is easily guided to the mounting hole, which contributes to the improvement of the workability of assembling the seat back.
  • the seat back when the side portion of the seat back is defined as a first side portion and the shaft body is defined as a first shaft portion, the seat back is in contact with the first side portion in the vehicle width direction. Is provided on a second side surface on the opposite side with a second shaft extending outward from the second side along the same axis as the first shaft, and the second portion is provided on a floor portion of the vehicle body.
  • a support portion rotatably supporting the shaft body, wherein the second shaft portion is engaged with the support portion to restrict the second shaft portion from being displaced in the axial direction; Is preferably provided.
  • the first shaft body extends from the inner wall portion of the vehicle body toward the vehicle interior, and the support portion is, on the floor portion, the center of the vehicle interior in the vehicle width direction or the center thereof. It is provided in the vicinity position.
  • Such a structure is often used for a rear row of two-row seats and a third row of three-row seats. In such a structure, it may be required to assemble the vehicle body with the seat back inclined with respect to the first shaft body. Therefore, the support structure of each aspect described above is particularly useful when the first shaft body is provided on the inner wall portion of the vehicle body and the support portion is provided on the floor portion of the vehicle body.

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  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

This vehicle seat support structure is provided with: a shaft body affixed to a vehicle body and extending in a vehicle width direction; and holding sections each provided to one of the side surfaces of a seat back, the holding section having a spherical body which has a mounting hole extending in the vehicle width direction, and also having a circular arc cross-sectioned receiving surface which corresponds to the outer peripheral surface of the spherical body, the holding section holding, on the receiving surface thereof, the spherical body in a rollable manner. The shaft body is inserted in the mounting holes, and as a result, the seat back is supported so as to be rockable about the shaft body in a front-rear direction relative to the vehicle body.

Description

車両用シートの支持構造Vehicle seat support structure
　本発明は、自動車などの車両用シート、特に、リヤシートに適した車両用シートの支持構造に関する。 The present invention relates to a structure for supporting a vehicle seat such as an automobile, particularly, a vehicle seat suitable for a rear seat.
　シートクッションとシートバックとを備え、シートクッションに折り重なるようにシートバックを前傾させることにより、荷室を拡張できるようにした車両用のリヤシートが知られている。この種のリヤシートの一例として特許文献１が開示されている。 リ ヤ Vehicle rear seats are known which include a seat cushion and a seat back, and in which the luggage compartment can be expanded by tilting the seat back forward so as to be folded on the seat cushion. Patent Document 1 is disclosed as an example of this type of rear seat.
　特許文献１に開示されるリヤシートは、分割可倒式の左右一対のシートバックを備えている。左右のシートバックは、各々、車内側に突出するようにホイルハウスフレームに固定された車体側ピンと、車体フロアの中央部に固定された取付具とによって傾倒（揺動）可能に支持されている。詳しくは、シートバックフレームの車外側（ドア側）の側面部に貫通穴が形成され、この貫通穴に車体側ピンが挿入されている。また、シートバックフレームの車内側（センター側）の側面部にシート側ピンが設けられ、このシート側ピンが取付具に支持されている。この構成により、左右のシートバックが、各々、車体側ピンとシート側ピンとを支点として、車体に対して前後方向に傾倒可能に支持されている。 リ ヤ The rear seat disclosed in Patent Document 1 is provided with a pair of left and right seatbacks that can be folded and split. The left and right seatbacks are each supported by a vehicle body side pin fixed to a wheel house frame so as to protrude into the vehicle interior and a fixture fixed to a central portion of the vehicle body floor so as to be tiltable (swingable). . Specifically, a through hole is formed in a side portion of the seat back frame on the vehicle outside (door side), and a vehicle body side pin is inserted into the through hole. In addition, a seat-side pin is provided on a side portion of the seat back frame on the vehicle inner side (center side), and the seat-side pin is supported by a mounting tool. With this configuration, the left and right seatbacks are supported so as to be tiltable in the front-rear direction with respect to the vehicle body with the vehicle-side pin and the seat-side pin as fulcrums.
　なお、前記貫通穴には筒状の樹脂キャップが挿着されており、車体側ピンは、正確には、この樹脂キャップの内側（取付穴という）に挿入されている。樹脂キャップの外周面は、幅方向両側（軸方向両側）にテーパ面が形成された断面山型を成している。これにより、樹脂キャップは、シートバックフレームの側面部（貫通穴）に対して揺動可能となっている。従って、車体へのシートバックの組み付けの際には、シートバックフレームに対して樹脂キャップを傾ける、すなわち取付穴を傾けることにより、車体側ピンに対してシートバックを傾けた状態のままで、当該車体側ピンをシートバックフレームの貫通穴（取付穴）に挿入することができ、これにより、車体へのシートバックの組付作業が簡便になると、特許文献１には記載されている。 筒 A cylindrical resin cap is inserted into the through hole, and the vehicle body side pin is inserted accurately inside the resin cap (referred to as a mounting hole). The outer peripheral surface of the resin cap has a cross-section having tapered surfaces formed on both sides in the width direction (both sides in the axial direction). This allows the resin cap to swing with respect to the side surface portion (through hole) of the seat back frame. Therefore, when assembling the seat back to the vehicle body, by tilting the resin cap with respect to the seat back frame, that is, by tilting the mounting hole, the seat back is tilted with respect to the vehicle body side pin. Patent Document 1 describes that a vehicle body side pin can be inserted into a through hole (mounting hole) of a seat back frame, thereby simplifying an operation of assembling a seat back to a vehicle body.
　しかし、特許文献１に開示される従来の車両用シートでは、樹脂キャップの外周面が山型であって、当該樹脂キャップの外周面と前記貫通穴の内周面とが線接触に近い状態となっている。そのため、乗員の荷重などによって外周の山部を押し潰すように樹脂キャップが変形するおそれがある。このような変形は、樹脂キャップとこれが挿着された貫通穴の内周面との間に隙間を形成してシートバックのガタツキを誘発し、ひいては乗り心地を阻害する要因の１つとなる。 However, in the conventional vehicle seat disclosed in Patent Document 1, the outer peripheral surface of the resin cap has a mountain shape, and the outer peripheral surface of the resin cap and the inner peripheral surface of the through hole are in a state close to line contact. Has become. For this reason, there is a possibility that the resin cap is deformed so as to crush the outer peripheral ridges due to the load of the occupant or the like. Such a deformation forms a gap between the resin cap and the inner peripheral surface of the through-hole in which the resin cap is inserted, causing rattling of the seat back, which is one of the factors that hinder ride comfort.
　また、筒状の樹脂キャップの一端に、車体側ピンを取付穴に誘導するためのフランジ部が設けられているため、樹脂キャップを傾けると、このフランジ部がシートバックフレームの側面部に当たってしまう。そのため、樹脂キャップ（取付穴）を傾かせることができる角度の範囲は比較的小さく、シートバックを、車体側ピンに対して大きく傾けた状態で車体に組み付けることは難しい。よって、従来の車両用シートは、組付作業性の向上に充分に寄与するものとは言えなかった。 た め Furthermore, since a flange portion for guiding the vehicle body side pin to the mounting hole is provided at one end of the cylindrical resin cap, if the resin cap is tilted, this flange portion hits a side surface portion of the seat back frame. Therefore, the range of angles at which the resin cap (mounting hole) can be tilted is relatively small, and it is difficult to mount the seat back to the vehicle body in a state where the seat back is largely tilted with respect to the vehicle body side pin. Therefore, it cannot be said that the conventional vehicle seat sufficiently contributes to the improvement of the assembling workability.
特許第５８９５７４３号公報Japanese Patent No. 5895743
　本発明は、上記の事情に鑑みてなされたものであって、シートバックのガタツキを誘発するようなことなく、車体へのシートバックの組付作業性をより向上させることができる、車両用シートの支持構造を提供することを目的とする。 The present invention has been made in view of the above circumstances, and can improve the workability of assembling a seatback to a vehicle body without inducing rattling of the seatback. It is an object of the present invention to provide a support structure.
　そして、本発明は、可倒式のシートバックを有する車両用シートの支持構造であって、車体に固定されて車幅方向に延びる軸体と、前記シートバックの側面部に設けられた、車幅方向に延びる取付穴を有した球状体、および前記球状体の外周面に対応する断面円弧状の受け面を有しかつ当該受け面で前記球状体を転動可能に保持する保持部と、を備え、前記シートバックは、前記取付穴に前記軸体が挿入されることにより、当該軸体を支点として前記車体に対して前後方向に揺動可能に支持されているものである。 The present invention is a vehicle seat support structure having a retractable seat back, comprising: a shaft fixed to a vehicle body and extending in a vehicle width direction; and a vehicle provided on a side surface of the seat back. A spherical body having a mounting hole extending in the width direction, and a holding portion having a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body and holding the spherical body so as to roll on the receiving surface, The seat back is supported by the shaft body inserted into the mounting hole so as to be swingable in the front-rear direction with respect to the vehicle body with the shaft body as a fulcrum.
図１は、本発明の実施形態に係る車両用シート（リヤシート）の斜視図である。FIG. 1 is a perspective view of a vehicle seat (rear seat) according to an embodiment of the present invention. 図２Ａは、車両用シートのシートバックの支持構造を示す、シートバックフレームの正面図である。FIG. 2A is a front view of a seat back frame, showing a support structure of a seat back of a vehicle seat. 図２Ｂは、車両用シートのシートバックの支持構造を示す、シートバックフレームの側面図である。FIG. 2B is a side view of the seat back frame, showing the support structure of the seat back of the vehicle seat. 図３は、シートバックフレームの車外側の支持構造を示す側面図である。FIG. 3 is a side view showing a support structure on the vehicle outside of the seat back frame. 図４は、シートバックフレームの車外側の支持構造を示す分解斜視図である。FIG. 4 is an exploded perspective view showing a support structure on the vehicle outside of the seat back frame. 図５は、シートバックフレームの車外側の支持構造を示す断面図（図３のＶ－Ｖ線断面図）である。FIG. 5 is a cross-sectional view (a cross-sectional view taken along line VV in FIG. 3) showing a support structure of the seat back frame on the vehicle outside. 図６は、シートバックフレームの車内側の支持構造を説明するための斜視図である。FIG. 6 is a perspective view illustrating a support structure of the seat back frame on the vehicle interior side. 図７は、シートバックフレームの車内側の支持構造を説明するための分解斜視図である。FIG. 7 is an exploded perspective view for explaining a support structure on the vehicle inner side of the seat back frame. 図８は、車体に対するシートバックの組付手順を説明する説明図である。FIG. 8 is an explanatory diagram illustrating a procedure for assembling the seat back to the vehicle body. 図９は、球状体（取付穴）とピンとの関係を示すシートバックフレームの断面図である。FIG. 9 is a cross-sectional view of the seat back frame showing the relationship between the spherical body (mounting hole) and the pin.
　以下、本発明の実施形態について図面を参照しつつ詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
　［車両用シートの全体構成］
　図１は、本発明の実施形態に係る車両用シートの斜視図である。同図に示す車両用シート１は、車両の後部席として用いられるリヤシートであり、前後２列のシートを有する車両のリヤシート、或いは前後３列のシートを有する車両の第３列目のシートに相当するものである。 [Overall configuration of vehicle seat]
FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention. The vehicle seat 1 shown in FIG. 1 is a rear seat used as a rear seat of the vehicle, and corresponds to a rear seat of a vehicle having two front and rear rows or a third row of a vehicle having three front and rear rows. Is what you do.
　なお、以下の説明で使用する「方向」に関する用語（前後左右等）は、車両に搭載された状態の車両用シート１を基準とする。 用語 Note that the terms (direction, front and rear, left and right, etc.) used in the following description regarding the “direction” are based on the vehicle seat 1 mounted on the vehicle.
　車両用シート１は、シートバックを分割して傾倒することが可能な、いわゆる分割可倒式のシートである。詳しくは、図１に示すように、車両用シート１は、車幅方向に亘って延在するシートクッション２と、シートクッション２の左側の領域に対応して設けられた左側シートバック３と、シートクッション２の右側の領域に対応して設けられた右側シートバック４と、右側及び左側のシートバック３、４の各々に設けられたヘッドレスト３ａ、４ａとを備えている。左側シートバック３および右側シートバック４は、前後方向に個別に傾倒可能とされ、図１の二点鎖線に示すように、シートクッション２に折り重なるように前傾させることで、車両用シート後方の荷室空間などを拡張できるようになっている。 The vehicle seat 1 is a so-called splittable seat that can split and tilt the seatback. Specifically, as shown in FIG. 1, the vehicle seat 1 includes a seat cushion 2 extending in a vehicle width direction, a left seat back 3 provided corresponding to a left area of the seat cushion 2, The seat cushion 2 includes a right seat back 4 provided corresponding to a right region of the seat cushion 2, and headrests 3a, 4a provided in the right and left seat backs 3, 4, respectively. The left seat back 3 and the right seat back 4 can be individually tilted in the front-rear direction, and are tilted forward so as to be folded on the seat cushion 2 as shown by a two-dot chain line in FIG. The luggage space can be expanded.
　左側シートバック３と右側シートバック４との車幅方向の比率は、当例では５：５である。但し、この比率は５：５に限定されるものではなく６：４などであってもよい。 比率 The ratio of the left seat back 3 to the right seat back 4 in the vehicle width direction is 5: 5 in this example. However, this ratio is not limited to 5: 5, but may be 6: 4 or the like.
　車両用シート１のうち、シートクッション２は、車体のフロア部７に固定的に支持されている。一方、左側シートバック３及び右側シートバック４は、各々、車体のフロア部７と、ホイルハウスフレーム等の車体の内壁部６とに跨って支持されている。 シ ー ト The seat cushion 2 of the vehicle seat 1 is fixedly supported by the floor 7 of the vehicle body. On the other hand, the left seat back 3 and the right seat back 4 are respectively supported over a floor portion 7 of the vehicle body and an inner wall portion 6 of the vehicle body such as a wheel house frame.
　［車両用シート（シートバック）の支持構造］
　図２Ａは、車両用シート１の左側シートバック３の支持構造を示す、シートバックフレーム１０の正面図、図２Ｂは、前記支持構造を示す、シートバックフレーム１０の側面図である。左側シートバック３は、図２Ａ及び図２Ｂに示すシートバックフレーム１０と、このシートバックフレーム１０に組付けられる図外のシートバックパッドと、シートバックパッドを外側から覆う図外のシート表皮などによって構成されている。 [Support structure for vehicle seat (seat back)]
FIG. 2A is a front view of the seat back frame 10 showing a support structure of the left seat back 3 of the vehicle seat 1, and FIG. 2B is a side view of the seat back frame 10 showing the support structure. The left seat back 3 includes a seat back frame 10 shown in FIGS. 2A and 2B, a seat back pad (not shown) attached to the seat back frame 10, a seat cover (not shown) that covers the seat back pad from the outside, and the like. It is configured.
　シートバックフレーム１０は、パイプ部材等の金属製の複数の部材が接合されることにより構成された、左側シートバック３の骨組みであり、正面視で略矩形を成している。シートバックフレーム１０の車外側（左側方）には、車室内に向かって膨出するホイルハウスフレーム等の内壁部６が存在している。シートバックフレーム１０の車外側（左側）の側面部１２のうち、上下方向中央部よりも下側の部分は、この膨出した内壁部６を避けるように、上側の部分に比べて車内側（車幅方向中央側）にオフセットされている。 The seat back frame 10 is a skeleton of the left seat back 3 formed by joining a plurality of metal members such as pipe members, and has a substantially rectangular shape in a front view. On the outside (left side) of the seat back frame 10, there is an inner wall portion 6 such as a wheel house frame swelling toward the vehicle interior. A portion of the side portion 12 on the vehicle outside (left side) of the seat back frame 10 below the central portion in the vertical direction is located on the vehicle inside ( It is offset to the center in the vehicle width direction).
　シートバックフレーム１０の車外側の側面部１２の下端の近傍位置には、球状体２２を保持した保持部１２ａが設けられている。そして、内壁部６に固定されたピン６ａ（本発明の第１軸体に相当する）が、この球状体２２に設けられた取付穴２４（図５参照）に挿入されている。これによって、シートバックフレーム１０の車外側の側面部１２が、ピン６ａにより前後方向に傾倒（揺動）可能に支持されている。 保持 A holding portion 12a holding the spherical body 22 is provided near the lower end of the side portion 12 on the vehicle outside of the seat back frame 10. A pin 6a (corresponding to a first shaft of the present invention) fixed to the inner wall 6 is inserted into a mounting hole 24 (see FIG. 5) provided in the spherical body 22. Thereby, the side portion 12 on the vehicle outside of the seat back frame 10 is supported by the pin 6a so as to be able to tilt (swing) in the front-rear direction.
　図３～図５は、このようなシートバックフレーム１０の車外側の側面部１２の支持構造を詳細に示している。図３は側面図で、図４は分解斜視図で、図５は断面図（図３のＶ－Ｖ線断面図）で各々前記支持構造を示している。 FIGS. 3 to 5 show the supporting structure of the side portion 12 on the vehicle outside of the seat back frame 10 in detail. 3 is a side view, FIG. 4 is an exploded perspective view, and FIG. 5 is a cross-sectional view (a cross-sectional view taken along the line VV in FIG. 3) showing the support structure.
　図３～図５に示すように、シートバックフレーム１０の車外側の側面部１２は、断面コ字型の金属プレートからなるブラケット２０と、これに固定されるリテーナ４０とを有している。 ～ As shown in FIGS. 3 to 5, the side portion 12 on the vehicle exterior side of the seat back frame 10 has a bracket 20 made of a metal plate having a U-shaped cross section and a retainer 40 fixed to the bracket.
　ブラケット２０には、車幅方向に貫通する円形の開口部３０が形成されている。この開口部３０は、例えばバーリング加工により形成されており、その周囲には車内側（右方）に向かって立ち上がる円環状の立ち上がり部３２が形成されている。開口部３０の内周面、すなわち立ち上がり部３２の内周面３２ａは、ブラケット２０の車外側の側面（左側面／後記リテーナ４０の接合面Ｆａ）の位置で内径が最大とされ、車内側（右方）に向かって内径が徐々に小さくなるように、詳しくは、球状体２２の外周面に対応した断面円弧状となるように先窄まりに形成されている。 The bracket 20 has a circular opening 30 penetrating in the vehicle width direction. The opening 30 is formed by, for example, burring, and an annular rising portion 32 that rises toward the inside (rightward) of the vehicle is formed around the opening 30. The inner peripheral surface of the opening 30, that is, the inner peripheral surface 32 a of the rising portion 32 has a maximum inner diameter at the position of the outer side surface of the bracket 20 (left side surface / joining surface Fa of the retainer 40 described later), and the inner side of the vehicle ( It is tapered so that the inner diameter gradually decreases toward the right (in the right direction), specifically, an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22.
　球状体２２は、ブラケット２０の車外側（左方）から開口部３０に挿入されており、リテーナ４０がこの球状体２２の外側からブラケット２０の車外側の側面（左側面）に固定されている。 The spherical body 22 is inserted into the opening 30 from the vehicle outside (left side) of the bracket 20, and the retainer 40 is fixed to the vehicle exterior side surface (left side surface) of the bracket 20 from outside the spherical body 22. .
　リテーナ４０は、車幅方向に貫通する円形の開口部４２を中央に備えた金属製のプレート状の部材である。開口部４２は、ブラケット２０の開口部３０と同様に、例えばバーリング加工で形成されており、その周囲には、車外側（左方）に向かって立ち上がる円環状の立ち上がり部４４が形成されている。リテーナ４０の開口部４２の内周面、すなわち立ち上がり部４４の内周面４４ａは、ブラケット２０の前記立ち上がり部３２の内周面３２ａと左右対称に形成されている。つまり、当該内周面４４ａは、車幅方向におけるブラケット２０との接合面Ｆａの位置で内径が最大とされ、車外側（左方）に向かって内径が徐々に小さくなるように、詳しくは球状体２２の外周面に対応した断面円弧状となるように先窄まりに形成されている。 The retainer 40 is a metal plate-shaped member having a circular opening 42 penetrating in the vehicle width direction at the center. The opening 42 is formed by, for example, burring, similarly to the opening 30 of the bracket 20, and an annular rising portion 44 that rises toward the vehicle outside (left side) is formed around the opening 42. . The inner peripheral surface of the opening 42 of the retainer 40, that is, the inner peripheral surface 44 a of the rising portion 44 is formed symmetrically with the inner peripheral surface 32 a of the rising portion 32 of the bracket 20. That is, the inner peripheral surface 44a is spherical in detail so that the inner diameter is maximized at the position of the joint surface Fa with the bracket 20 in the vehicle width direction and the inner diameter gradually decreases toward the outer side (left side) of the vehicle. It is tapered so as to have an arc-shaped cross section corresponding to the outer peripheral surface of the body 22.
　リテーナ４０は、前記球状体２２を開口部４２に受け入れた状態で、ブラケット２０に一体的に固定されている。具体的には、リベットＲ１が、ブラケット２０の車内側（右方）から、当該ブラケット２０の貫通穴３４とリテーナ４０の貫通穴４６とに亘って挿通され、リテーナ４０の外側（左外側）でカシメられることにより、リテーナ４０がブラケット２０に固定されている。これにより、ブラケット２０の立ち上がり部３２の内側とリテーナ４０の立ち上がり部４４の内側とに各々球状体２２が挿入され、かつ、当該立ち上がり部３２、４４によって球状体２２が車幅方向に抜け止めされた状態で、球状体２２がシートバックフレーム１０の車外側（左側方）の側面部１２に保持されている。 The retainer 40 is integrally fixed to the bracket 20 with the spherical body 22 received in the opening 42. Specifically, the rivet R1 is inserted from the inside of the bracket 20 (right side) to the through hole 34 of the bracket 20 and the through hole 46 of the retainer 40, and is outside the retainer 40 (outside left). By caulking, the retainer 40 is fixed to the bracket 20. Thereby, the spherical body 22 is inserted into the inside of the rising part 32 of the bracket 20 and the inside of the rising part 44 of the retainer 40, and the spherical body 22 is prevented from falling in the vehicle width direction by the rising parts 32, 44. In this state, the spherical body 22 is held on the side portion 12 on the vehicle outside (left side) of the seat back frame 10.
　ブラケット２０の立ち上がり部３２の内周面３２ａおよびリテーナ４０の立ち上がり部４４の内周面４４ａは、上記の通り、球状体２２の外周面に対応した断面円弧状である。よって、球状体２２は、シートバックフレーム１０の側面部１２に対して転動可能である。つまり、上記保持部１２ａは、ブラケット２０の立ち上がり部３２及びリテーナ４０の立ち上がり部４４によって構成されており、当該保持部１２ａは、球状体２２の外周面に対応する断面円弧状の受け面を有し、当該受け面で球状体２２を転動可能に保持する。 The inner peripheral surface 32a of the rising portion 32 of the bracket 20 and the inner peripheral surface 44a of the rising portion 44 of the retainer 40 have an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22 as described above. Therefore, the spherical body 22 can roll with respect to the side surface part 12 of the seat back frame 10. That is, the holding portion 12 a is constituted by the rising portion 32 of the bracket 20 and the rising portion 44 of the retainer 40, and the holding portion 12 a has a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body 22. Then, the spherical body 22 is rotatably held by the receiving surface.
　球状体２２は、ＰＯＭ（ポリアセタール樹脂）材などの樹脂材料、或いは含油の燒結金属など、強度および耐久性に優れた材料により全体が一体に成型されている。球状体２２は、その表面に複数の凹部を備えており、これにより、強度や耐久性を保ちつつ、前記立ち上がり部３２、４４の内周面３２ａ、４４ａとの摺動抵抗を低減させるように構成されている。 The spherical body 22 is integrally formed of a resin material such as a POM (polyacetal resin) material or a material having excellent strength and durability such as an oil-impregnated sintered metal. The spherical body 22 is provided with a plurality of concave portions on its surface, so that the sliding resistance between the rising portions 32 and 44 and the inner peripheral surfaces 32a and 44a of the rising portions 32 and 44 is reduced while maintaining strength and durability. It is configured.
　図４及び図５に示すように、球状体２２は、その中心に、車幅方向に貫通する取付穴２４を有している。上記の通り、この取付穴２４に前記ピン６ａが挿入されることによって、シートバックフレーム１０の車外側（左側）の側面部１２が、ピン６ａにより前後方向に傾倒（揺動）可能に支持されている。ピン６ａは、車体の内壁部６から車幅方向に沿って真っ直ぐに（前後に傾くことなく）かつ水平に延びている。 球状 As shown in FIGS. 4 and 5, the spherical body 22 has a mounting hole 24 at the center thereof, which penetrates in the vehicle width direction. As described above, by inserting the pin 6a into the mounting hole 24, the side portion 12 on the vehicle outside (left side) of the seat back frame 10 is supported by the pin 6a so as to be able to tilt (swing) in the front-rear direction. ing. The pin 6a extends straight (without leaning back and forth) and horizontally from the inner wall portion 6 of the vehicle body in the vehicle width direction.
　球状体２２は、取付穴２４の各開口縁部に沿って環状のボス部２６を備えている。これらのボス部２６は、球状体２２が一定角度以上傾くと、ブラケット２０の立ち上がり部３２の先端３２ｂ（本発明の規制部に相当する）及びリテーナ４０の立ち上がり部４４の先端４４ｂ（本発明の規制部に相当する）に各々当接するように設けられている。これにより、球状体２２の傾き角度（転動範囲）が一定範囲内に規制されるようになっている。当例では、取付穴２４の中心軸Ａｘ１とピン６ａの中心軸Ａｘ２との成す角度θが３０°を超えないように、球状体２２の傾き角度が規制されるようになっている（図９参照）。換言すると、球状体２２は前記角度θが０°～３０°の範囲内で傾くことが許容される。 The spherical body 22 has an annular boss 26 along each opening edge of the mounting hole 24. When the spherical body 22 is tilted by a certain angle or more, the bosses 26 are configured such that the tip 32b of the rising portion 32 of the bracket 20 (corresponding to the regulating portion of the present invention) and the tip 44b of the rising portion 44 of the retainer 40 (the present invention). (Corresponding to the regulating portion). Thereby, the inclination angle (rolling range) of the spherical body 22 is regulated within a certain range. In this example, the inclination angle of the spherical body 22 is regulated so that the angle θ between the central axis Ax1 of the mounting hole 24 and the central axis Ax2 of the pin 6a does not exceed 30 ° (FIG. 9). reference). In other words, the spherical body 22 is allowed to be inclined when the angle θ is in the range of 0 ° to 30 °.
　図６及び図７は、シートバックフレーム１０の車内側（右側）の側面部１３の支持構造を詳細に示している。図６は斜視図で、図７は分解斜視図で各々前記支持構造を示している。 FIGS. 6 and 7 show the support structure of the side portion 13 on the vehicle interior (right side) of the seat back frame 10 in detail. FIG. 6 is a perspective view, and FIG. 7 is an exploded perspective view, each showing the support structure.
　シートバックフレーム１０の車内側の側面部１３は、金属プレートからなるブラケット５０を有している。このブラケット５０には、車内側（右方）に延びるピン５２（本発明の第２軸体に相当する）が設けられており、図２Ａ、図２Ｂ、図６及び図７に示すように、このピン５２が、車体のフロア部７に設けられた支持部材６０により支持されている。これにより、シートバックフレーム１０の車内側の側面部１３が、支持部材６０によって前後方向に傾倒（揺動）可能に支持されている。 側面 The side portion 13 on the vehicle interior side of the seat back frame 10 has a bracket 50 made of a metal plate. The bracket 50 is provided with a pin 52 (corresponding to a second shaft body of the present invention) extending inward (rightward) of the vehicle. As shown in FIGS. 2A, 2B, 6 and 7, The pin 52 is supported by a support member 60 provided on the floor 7 of the vehicle body. Thus, the side surface portion 13 on the vehicle interior side of the seat back frame 10 is supported by the support member 60 so as to be able to tilt (swing) in the front-rear direction.
　支持部材６０は、図外のボルト等によってフロア部７に固定されるプレート状のベース部６２と、このベース部６２の中央に立設されたピン支持部６４と、このピン支持部６４に固定されるカバー部材６６とを含む。支持部材６０のうち、カバー部材６６を除く部分は金属材料により一体に構成されている。 The support member 60 includes a plate-shaped base portion 62 fixed to the floor portion 7 by bolts or the like (not shown), a pin support portion 64 erected at the center of the base portion 62, and fixed to the pin support portion 64. And a cover member 66 to be formed. The portion of the support member 60 other than the cover member 66 is integrally formed of a metal material.
　ピン支持部６４は、車幅方向に所定間隔を隔てて対面する一対のピン支持プレート６４ａ（本発明の支持部に相当する）を備えている。これらのピン支持プレート６４ａは前記ピン５２を支持するものであり、左側のピン支持プレート６４ａは、左側シートバック３のピン５２を支持し、右側のピン支持プレート６４ａは、右側シートバック４のピン５２を支持するものである。 The pin support 64 includes a pair of pin support plates 64a (corresponding to the support of the present invention) facing each other at a predetermined interval in the vehicle width direction. The pin support plates 64a support the pins 52, the left pin support plate 64a supports the pins 52 of the left seat back 3, and the right pin support plate 64a supports the pins of the right seat back 4. 52 is supported.
　ピン支持プレート６４ａには、上向きに開口する側面視Ｕ字型の切欠からなる軸受部６５が設けられており、これら軸受部６５により前記ピン５２が支持されている。詳しくは、ピン５２には、ピン支持プレート６４ａの厚み寸法よりも僅かに大きい溝幅の周溝５２ａが形成されている。ピン５２は、この周溝５２ａ内にピン支持プレート６４ａを介在させた状態で前記軸受部６５によって支持されている。これにより、ピン５２は、車幅方向への変位が規制された状態で軸受部６５によって回動可能に支持される。 軸 受 The pin support plate 64a is provided with bearings 65 formed of U-shaped cutouts that open upward and are viewed from the side, and the bearings 65 support the pins 52. More specifically, a peripheral groove 52a having a groove width slightly larger than the thickness of the pin support plate 64a is formed in the pin 52. The pin 52 is supported by the bearing 65 with a pin support plate 64a interposed in the circumferential groove 52a. Thus, the pin 52 is rotatably supported by the bearing 65 in a state where the displacement in the vehicle width direction is restricted.
　カバー部材６６は、下方が開口した例えば樹脂製の箱形の部材であり、ピン支持部６４の上端部に固定されることにより、図６に示すように、各ピン支持プレート６４ａ（軸受部６５）に支持された左右のシートバック３、４のピン５２を一体に上方から覆う。これにより、各シートバック３、４のピン５２が軸受部６５から意図せず脱落することが防止されるようになっている。カバー部材６６は、ボルトＢ１によりピン支持部６４に着脱可能に固定されている。なお、図２Ａでは、右側シートバック４は省略されている。 The cover member 66 is a box-shaped member made of, for example, resin and has an opening at the bottom, and is fixed to the upper end portion of the pin support portion 64 so that each pin support plate 64a (bearing portion 65) as shown in FIG. ), The pins 52 of the left and right seatbacks 3 and 4 are integrally covered from above. This prevents the pins 52 of the respective seatbacks 3 and 4 from unintentionally falling off the bearing 65. The cover member 66 is detachably fixed to the pin support 64 by bolts B1. In FIG. 2A, the right seat back 4 is omitted.
　なお、ここでは、車両用シート１の左側シートバック３の支持構造について詳細に説明したが、右側シートバック４の支持構造も、左右が対称となる（すなわち、右側シートバック４の右側が車外側の側面部１２となり、左側が車内側の側面部１３となる）だけで基本的には左側シートバック３と同じである。従って、右側シートバック４の支持構造についての詳細な説明は省略する。 Although the support structure of the left seat back 3 of the vehicle seat 1 has been described in detail here, the support structure of the right seat back 4 is also symmetrical left and right (that is, the right side of the right seat back 4 is on the outside of the vehicle). And the left side is the side portion 13 on the inside of the vehicle), and is basically the same as the left seat back 3. Therefore, a detailed description of the support structure of the right seat back 4 is omitted.
　［車体に対する車両用シート（シートバック）の組付］
　図８は、車体に対する左側シートバック３の組付手順を説明する説明図である。図８のセクション（ａ）～（ｃ）は、図２ＢのＶＩＩＩ－ＶＩＩＩ線断面に相当する断面図で各左側シートバック３の組付手順を示している。 [Assembling of vehicle seat (seat back) to vehicle body]
FIG. 8 is an explanatory diagram illustrating a procedure for assembling the left seat back 3 to the vehicle body. Sections (a) to (c) of FIG. 8 are sectional views corresponding to the section taken along line VIII-VIII of FIG.
　左側シートバック３を車体に組み込むには、まず、球状体２２の取付穴２４に、車体の内壁部６から突出しているピン６ａを挿入する必要がある。この場合、車幅方向に沿って取付穴２４にピン６ａを挿入しようとすると、支持部材６０のピン支持部６４と左側シートバック３とが干渉する。そのため、図８のセクション（ａ）に示すように、車内側の側面部１３が車外側の側面部１２よりも後方に位置するように左側シートバック３を傾け、この状態で左側シートバック３を車外側（左方）に移動させることにより、取付穴２４にピン６ａを挿入する。 To incorporate the left seat back 3 into the vehicle body, first, it is necessary to insert a pin 6 a protruding from the inner wall portion 6 of the vehicle body into the mounting hole 24 of the spherical body 22. In this case, when the pin 6a is inserted into the mounting hole 24 along the vehicle width direction, the pin support portion 64 of the support member 60 and the left seat back 3 interfere. Therefore, as shown in section (a) of FIG. 8, the left seat back 3 is inclined such that the side portion 13 on the inside of the vehicle is located behind the side portion 12 on the outside of the vehicle. The pin 6a is inserted into the mounting hole 24 by moving the pin 6a to the outside (left side) of the vehicle.
　この際、球状体２２は側面部１２に転動可能に保持されているので、図９に示すように、取付穴２４の中心軸Ａｘ１とピン６ａの中心軸Ａｘ２とが平行でない場合でも、ピン６ａの先端部を取付穴２４の入口部分に突き当て、この状態で左側シートバック３を左方に押圧すれば、自ずと取付穴２４の中心軸Ａｘ１とピン６ａの中心軸Ａｘ２とが一致するように球状体２２が転動する。これにより取付穴２４にピン６ａが挿入される。つまり、左側シートバック３をピン６ａに対して傾けた状態で、取付穴２４にピン６ａを挿入することができる。この場合、ピン６ａの先端には先細りのテーパ部７０が設けられ、取付穴２４の入口部分の内周面には上記の通りテーパ部２４ａが設けられているので、ピン６ａを取付穴２４内に誘導しながら円滑に挿入することができる。 At this time, since the spherical body 22 is rotatably held on the side surface portion 12, even if the center axis Ax1 of the mounting hole 24 and the center axis Ax2 of the pin 6a are not parallel as shown in FIG. If the front end of 6a abuts against the entrance of the mounting hole 24 and the left seat back 3 is pressed to the left in this state, the center axis Ax1 of the mounting hole 24 and the center axis Ax2 of the pin 6a naturally coincide with each other. The spherical body 22 rolls. Thus, the pin 6a is inserted into the mounting hole 24. That is, the pin 6a can be inserted into the mounting hole 24 with the left seat back 3 inclined with respect to the pin 6a. In this case, a tapered tapered portion 70 is provided at the tip of the pin 6a, and the tapered portion 24a is provided on the inner peripheral surface of the entrance portion of the mounting hole 24 as described above. It can be inserted smoothly while guiding to.
　取付穴２４にピン６ａを挿入したら、次に、図８のセクション（ｂ）に示すように、左側シートバック３の車内側の側面部１３を前方に移動させ、図８のセクション（ｃ）に示すように、当該側面部１３に設けられたピン５２を支持部材６０のピン支持部６４に支持させる。詳しくは、ピン５２の周溝５２ａ内にピン支持プレート６４ａが介在するように、ピン５２を軸受部６５によって支持させる。このようにピン５２を軸受部６５に支持させると、ピン支持プレート６４ａによってピン５２の軸方向（車幅方向）への変位が規制され、これによって車幅方向の特定位置に左側シートバック３が位置決めされる。 After the pin 6a is inserted into the mounting hole 24, the side surface portion 13 on the vehicle interior side of the left seat back 3 is moved forward as shown in section (b) of FIG. As shown, the pin 52 provided on the side surface portion 13 is supported by the pin support portion 64 of the support member 60. Specifically, the pin 52 is supported by the bearing 65 such that the pin support plate 64a is interposed in the circumferential groove 52a of the pin 52. When the pin 52 is supported by the bearing portion 65 in this manner, the displacement of the pin 52 in the axial direction (vehicle width direction) is restricted by the pin support plate 64a, whereby the left seat back 3 is positioned at a specific position in the vehicle width direction. Positioned.
　ここでは、左側シートバック３について説明したが、右側シートバック４についても、左右が異なるだけで、左側シートバック３と同様の手順で車体に組み込むことができる。 Here, the left seat back 3 has been described, but the right seat back 4 can be incorporated into the vehicle body in the same procedure as the left seat back 3 except that the left and right sides are different.
　左側シートバック３及び右側シートバック４を各々車体に組み込んだ後は、支持部材６０のピン支持部６４にカバー部材６６を装着、固定する。これにより、車体へのシートバック３、４の組付作業が完了する。 After the left seat back 3 and the right seat back 4 are assembled into the vehicle body, the cover member 66 is attached and fixed to the pin support portion 64 of the support member 60. This completes the work of attaching the seat backs 3 and 4 to the vehicle body.
　なお、図８のセクション（ａ）～（ｃ）では、車内側の側面部１３が車外側の側面部１２よりも後方に位置するようにシートバック３、４を傾ける例について説明した。しかし、例えば、車内側の側面部１３が車外側の側面部１２よりも上方に位置するようにシートバック３、４を上下に傾け、これにより支持部材６０（ピン支持部６４）とシートバック３、４との干渉を避けるようにしてもよい。 In the sections (a) to (c) of FIG. 8, an example has been described in which the seatbacks 3 and 4 are tilted such that the side portion 13 on the inside of the vehicle is located behind the side portion 12 on the outside of the vehicle. However, for example, the seatbacks 3 and 4 are tilted up and down so that the side portion 13 on the inside of the vehicle is located above the side portion 12 on the outside of the vehicle. , 4 may be avoided.
　［作用効果等］
　以上説明した車両用シート１の支持構造では、シートバック３、４の車外側の側面部１２は、車体の内壁部６に固定されたピン６ａによって支持されるが、このピン６ａはシートバックフレーム１０に転動可能に保持された球状体２２の取付穴２４に挿入される。そのため、許容される取付穴２４の傾き角度の範囲が比較的大きく、シートバック３、４を車体に組み込む際には、シートバック３、４をより大きく傾けて、支持部材６０（ピン支持部６４）を確実に避けることができる。従って、シートバック３、４と支持部材６０とが干渉しないように注意を払うといった労力が軽減され、その分、左側シートバック３を車体に組み付ける際の作業性が向上する。 [Effects, etc.]
In the support structure of the vehicle seat 1 described above, the outer side surface portions 12 of the seat backs 3 and 4 are supported by pins 6a fixed to the inner wall portion 6 of the vehicle body. 10 is inserted into the mounting hole 24 of the spherical body 22 which is held so as to be able to roll. For this reason, the allowable range of the inclination angle of the mounting hole 24 is relatively large, and when the seatbacks 3 and 4 are incorporated in the vehicle body, the seatbacks 3 and 4 are tilted more greatly to support the support member 60 (the pin support portion 64). ) Can be reliably avoided. Therefore, the labor for paying attention so that the seatbacks 3, 4 and the support member 60 do not interfere with each other is reduced, and the workability when assembling the left seatback 3 to the vehicle body is improved.
　ここで、例えば、シートバックの組み付け方法（構造）としては、シートバックとフロア部の支持部材とが干渉しないように、支持部材の位置をより車内側（車幅方向中央側）に設けることも考えられる。すなわち、車内側の支持部材にシートバックのピンを載せた状態で、シートバックを車外側に動かして、車体の内壁部に固定されたピンにシートバックの軸受ブッシュを挿入することも考えられる。しかし、こうした構造をとる場合、最終的な組み付け位置にシートバックを位置決めするために、その移動量分だけ、車幅方向に遊びが必要となる。本発明では、その移動量分に相当するシート車幅方向の遊びが不要となり、車内側で容易にシートバックの位置決めが可能となる。そのため、例えば、左右のシートバックの間の位置のばらつきを抑えて、外観の向上や前傾作動の安定化を図ることも可能である。 Here, for example, as an assembling method (structure) of the seat back, the position of the support member may be provided further inside the vehicle (center side in the vehicle width direction) so that the seat back does not interfere with the support member of the floor portion. Conceivable. That is, it is conceivable that the seatback pin is placed on the support member inside the vehicle and the seatback is moved outward to insert the bearing bush of the seatback into the pin fixed to the inner wall of the vehicle body. However, when such a structure is employed, play is required in the vehicle width direction by the amount of movement in order to position the seat back at the final assembly position. According to the present invention, the play in the width direction of the seat corresponding to the moving amount is not required, and the seat back can be easily positioned inside the vehicle. Therefore, for example, it is also possible to suppress the variation in the position between the left and right seatbacks, to improve the appearance and to stabilize the forward leaning operation.
　しかも、球状体２２を保持する保持部１２ａの受け面（すなわち、ブラケット２０の立ち上がり部３２の内周面３２ａ及びリテーナ４０の立ち上がり部４４の内周面４４ａ）は、球状体２２の外周面に対応した断面円弧状に形成されている。そのため、乗員等の荷重などが作用しても当該荷重が分散され易く、球状体２２が変形し（ヘタリ）難い。従って、球状体２２が変形して保持部１２ａの受け面（内周面３２ａ、４４ａ）との間に隙間が形成され、これによってシートバック３、４にガタツキが生じることが効果的に抑制される。 Moreover, the receiving surface of the holding portion 12 a that holds the spherical body 22 (that is, the inner peripheral surface 32 a of the rising portion 32 of the bracket 20 and the inner peripheral surface 44 a of the rising portion 44 of the retainer 40) is formed on the outer peripheral surface of the spherical body 22. It is formed in a corresponding arc-shaped cross section. Therefore, even if a load of an occupant or the like acts, the load is easily dispersed, and the spherical body 22 is unlikely to be deformed. Therefore, the spherical body 22 is deformed and a gap is formed between the receiving surface (the inner peripheral surfaces 32a and 44a) of the holding portion 12a, whereby rattling of the seatbacks 3 and 4 is effectively suppressed. You.
　また、前記球状体２２にはボス部２６が形成され、このボス部２６が保持部１２ａ（すなわち、ブラケット２０の立ち上がり部３２及びリテーナ４０の立ち上がり部４４）に係合することによって、球状体２２の転動範囲が規制される。従って、取付穴２４の傾き角度の範囲を比較的大きくしながらも、取付穴２４が意図せず保持部１２ａに隠れてしまうことが確実に防止される。 A boss 26 is formed on the spherical body 22, and the boss 26 is engaged with the holding part 12 a (ie, the rising part 32 of the bracket 20 and the rising part 44 of the retainer 40), so that the spherical body 22 is formed. Rolling range is regulated. Therefore, while the range of the inclination angle of the mounting hole 24 is relatively large, the mounting hole 24 is reliably prevented from being unintentionally hidden by the holding portion 12a.
　また、車両用シート１の支持構造では、シートバック３、４の車内側の側面部１３にピン５２が設けられ、このピン５２が、フロア部７に固定された支持部材６０（ピン支持プレート６４ａ）の軸受部６５によって支持される。ピン５２には周溝５２ａが形成されており、ピン５２は、この周溝５２ａ内にピン支持プレート６４ａが介在し、これにより軸方向の変位が規制された状態で軸受部６５によって支持される。従って、この車両用シート１の支持構造によれば、シートバック３、４の車外側の側面部１２を、取付穴２４に挿入されたピン６ａによって支持する構成でありながらも、シートバック３、４の全体を車幅方向の特定の位置に適切に位置決めすることができる。つまり、シートバック３、４が車幅方向にガタツクことが防止される。 Further, in the support structure of the vehicle seat 1, a pin 52 is provided on the inner side surface portion 13 of each of the seat backs 3 and 4, and the pin 52 is connected to a support member 60 (pin support plate 64a) fixed to the floor portion 7. ) Is supported by the bearing 65. A peripheral groove 52a is formed in the pin 52, and the pin 52 is supported by the bearing portion 65 in a state in which a pin support plate 64a is interposed in the peripheral groove 52a, thereby restricting axial displacement. . Therefore, according to the support structure of the vehicle seat 1, although the side surfaces 12 on the vehicle outside of the seat backs 3, 4 are supported by the pins 6a inserted into the mounting holes 24, the seat back 3, 4 4 can be appropriately positioned at a specific position in the vehicle width direction. That is, the seat backs 3, 4 are prevented from rattling in the vehicle width direction.
　［変形例等］
　以上説明した車両用シート１の支持構造は、本発明に係る車両用シートの支持構造の好ましい実施形態の例示であって、車両用シート１の具体的な構造や、当該車両用シート１の具体的な支持構造は、本発明の要旨を逸脱しない範囲で適宜変更可能である。例えば、以下のような態様であってもよい。 [Modifications, etc.]
The support structure of the vehicle seat 1 described above is an example of a preferred embodiment of the support structure of the vehicle seat according to the present invention, and the specific structure of the vehicle seat 1 and the specific structure of the vehicle seat 1 are described. The general support structure can be appropriately changed without departing from the gist of the present invention. For example, the following embodiment may be adopted.
　（１）実施形態では、球状体２２を転動可能に保持する保持部１２ａは、シートバックフレーム１０の側面部１２を構成する、ブラケット２０の立ち上がり部３２とリテーナ４０の立ち上がり部４４とで構成されている。しかし、保持部１２ａの構成はこれに限定されない。例えば保持部１２ａは、球状体２２を転動可能に保持するように、ブラケット２０とは別に設けられた部材であって、球状体２２と共にブラケット２０に組付けられる部材により構成されていてもよい。 (1) In the embodiment, the holding part 12 a that holds the spherical body 22 so as to rollably includes the rising part 32 of the bracket 20 and the rising part 44 of the retainer 40, which constitute the side part 12 of the seat back frame 10. Have been. However, the configuration of the holding unit 12a is not limited to this. For example, the holding portion 12a may be a member provided separately from the bracket 20 so as to rollably hold the spherical body 22, and may be configured by a member assembled to the bracket 20 together with the spherical body 22. .
　（２）実施形態では、シートバック３、４の車内側の側面部１３（ブラケット５０）を支持するピン５２に周溝５２ａが設けられており、この周溝５２ａにピン支持プレート６４ａを介在させることによってピン５２の軸方向の変位を規制する（シートバック３、４を車幅方向に位置決めする）ように構成されている。すなわち、周溝５２ａの両側の側壁部分が、ピン５２（第２軸体）の軸方向の変位を規制する本発明の「係合部」に相当する。しかし、ピン５２の軸方向の変位を規制するための構造はこれに限定されない。例えばピン５２に鍔部など径方向外側に突出する部分（係合部）を設ける一方、この突出部分を車幅方向両側から挟み込む部分を支持部材６０のピン支持部６４に設けることにより、ピン５２の軸方向の変位を規制してもよい。 (2) In the embodiment, the peripheral groove 52a is provided in the pin 52 that supports the side portion 13 (bracket 50) on the vehicle interior side of the seatbacks 3 and 4, and the pin supporting plate 64a is interposed in the peripheral groove 52a. This restricts the axial displacement of the pin 52 (positions the seatbacks 3, 4 in the vehicle width direction). That is, the side wall portions on both sides of the circumferential groove 52a correspond to the “engaging portions” of the present invention that regulate the axial displacement of the pin 52 (second shaft body). However, the structure for regulating the axial displacement of the pin 52 is not limited to this. For example, a portion (engaging portion) that protrudes radially outward such as a flange portion is provided on the pin 52, and a portion that sandwiches the protruding portion from both sides in the vehicle width direction is provided on the pin support portion 64 of the support member 60, so that May be restricted in the axial direction.
　（３）実施形態では、シートバック３の車内側の側面部１３（ブラケット５０）に設けられたピン５２を、フロア部７に固定された支持部材６０のピン支持部６４によって支持しているが、逆の構造であってもよい。すなわち、フロア部７側に車幅方向に延びるピンを備えた支持部材を配置する一方で、シートバック３の側面部１３に、前記ピンを受け入れる切欠部を備えた被支持部を設ける。これにより、前記ピンにより左側シートバック３を傾倒（揺動）可能に支持するようにしてもよい。 (3) In the embodiment, the pin 52 provided on the side portion 13 (bracket 50) inside the vehicle of the seat back 3 is supported by the pin support portion 64 of the support member 60 fixed to the floor portion 7. , And the reverse structure may be adopted. That is, a support member having a pin extending in the vehicle width direction is arranged on the floor portion 7 side, and a supported portion having a cutout portion for receiving the pin is provided on the side surface portion 13 of the seat back 3. Thereby, the left seat back 3 may be supported by the pin so as to be able to tilt (swing).
　以上説明した本発明についてまとめると以下の通りである。 The present invention described above is summarized as follows.
　すなわち、本発明は、可倒式のシートバックを有する車両用シートの支持構造であって、車体に固定されて車幅方向に延びる軸体と、前記シートバックの側面部に設けられ、車幅方向に延びる取付穴を有した球状体と、この球状体の外周面に対応する断面円弧状の受け面を有し、当該受け面で前記球状体を転動可能に保持する保持部と、を備え、前記シートバックは、前記取付穴に前記軸体が挿入されることにより、当該軸体を支点として前記車体に対して前後方向に揺動可能に支持されているものである。なお、「車体に固定されて車幅方向に延びる軸体」とは、軸体が車体に対して直接固定されている場合の他、ブラケット等の部材を介して固定されている場合の双方を含む。 That is, the present invention is a support structure for a vehicle seat having a retractable seat back, comprising: a shaft fixed to a vehicle body and extending in a vehicle width direction; A spherical body having a mounting hole extending in the direction, and a holding portion having a receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface of the spherical body, and holding the spherical body so as to roll on the receiving surface. The seatback is supported by the shaft body inserted into the mounting hole so as to be swingable in the front-rear direction with respect to the vehicle body with the shaft body serving as a fulcrum. In addition, "the shaft body fixed to the vehicle body and extending in the vehicle width direction" refers to both the case where the shaft body is directly fixed to the vehicle body and the case where the shaft body is fixed via a member such as a bracket. Including.
　この車両用シートの支持構造では、シートバックの側面部は、車体に固定された軸体によって支持される。この軸体は、シートバックの側面部に転動可能に保持された球状体に設けられた取付穴に挿入される。そのため、許容される取付穴の傾き角度の範囲が比較的大きい。よって、シートバックを車体に組み込む際には、シートバックをより大きく傾けた状態で、軸体を取付穴に挿入することが可能となる。しかも、球状体は、その外周面に対応する断面円弧状の受け面で受けられているので、乗員の荷重などが作用しても当該荷重が分散され易く、よって変形し（ヘタリ）難い。従って、球状体と保持部（受け面）との間に隙間が形成されてシートバックのガタツキを誘発することが効果的に抑制される。 In the vehicle seat support structure, the side surface of the seat back is supported by a shaft fixed to the vehicle body. The shaft is inserted into a mounting hole provided in a spherical body that is rollably held on the side surface of the seat back. Therefore, the allowable range of the inclination angle of the mounting hole is relatively large. Therefore, when the seatback is incorporated into the vehicle body, the shaft body can be inserted into the mounting hole with the seatback tilted further. In addition, since the spherical body is received by the receiving surface having an arc-shaped cross section corresponding to the outer peripheral surface, even if a load of the occupant or the like is applied, the load is easily dispersed, and therefore, the spherical body is unlikely to be deformed (severed). Therefore, it is possible to effectively suppress a gap from being formed between the spherical body and the holding portion (receiving surface) and causing rattling of the seat back.
　この支持構造において、前記球状体は、前記取付穴の開口縁部に沿って形成されたボス部を備え、前記保持部は、前記ボス部と係合することにより前記球状体の転動範囲を規制する規制部を備えるのが好適である。 In this support structure, the spherical body includes a boss formed along an opening edge of the mounting hole, and the holding portion engages with the boss to define a rolling range of the spherical body. It is preferable to provide a regulating unit for regulating.
　この構造によれば、取付穴の傾き角度の範囲を比較的大きく確保しながら、球状体が転動して取付穴が保持部に隠れてしまうことを防止することができる。そのため、シートバックの組付作業性の向上に寄与するものとなる。 According to this structure, it is possible to prevent the spherical body from rolling and the mounting hole from being hidden by the holding portion, while securing a relatively large range of the inclination angle of the mounting hole. This contributes to the improvement of the workability of assembling the seat back.
　上記の各支持構造において、前記取付穴の端部であって、前記軸体の入口側となる端部の内周面には、当該取付穴の外側から内側に向かって内径が小さくなるテーパ部が設けられているのが好適である。 In each of the above support structures, an inner peripheral surface of an end portion of the mounting hole, which is an entrance side of the shaft body, has a tapered portion whose inner diameter decreases from the outside to the inside of the mounting hole. Is preferably provided.
　この構造によれば、取付穴に対して軸体の先端を誘導し易くなるため、シートバックの組付作業性の向上に寄与するものとなる。 According to this structure, the tip of the shaft body is easily guided to the mounting hole, which contributes to the improvement of the workability of assembling the seat back.
　上記の各支持構造においては、前記シートバックの側面部を第１側面部、前記軸体を第１軸体と各々定義したときに、前記シートバックは、車幅方向における前記第１側面部とは反対側の第２側面部に、前記第１軸体と同一軸線上に沿って当該第２側面部から外向きに延びる第２軸体を備え、前記車体のフロア部には、前記第２軸体を回動可能に支持する支持部が備えられ、前記第２軸部には、前記支持部と係合することにより当該第２軸部が軸方向に変位することを規制する係合部が設けられているのが好適である。 In each of the above support structures, when the side portion of the seat back is defined as a first side portion and the shaft body is defined as a first shaft portion, the seat back is in contact with the first side portion in the vehicle width direction. Is provided on a second side surface on the opposite side with a second shaft extending outward from the second side along the same axis as the first shaft, and the second portion is provided on a floor portion of the vehicle body. A support portion rotatably supporting the shaft body, wherein the second shaft portion is engaged with the support portion to restrict the second shaft portion from being displaced in the axial direction; Is preferably provided.
　この構造によれば、球状体（取付穴）に挿入された第１軸体によってシートバックを支持しながら、当該シートバックを車幅方向の特定位置に位置決めすることが可能となる。 According to this structure, it is possible to position the seatback at a specific position in the vehicle width direction while supporting the seatback with the first shaft inserted into the spherical body (mounting hole).
　上記の各支持構造において、前記第１軸体は、車体の内壁部から車室内に向かって延びるものであり、前記支持部は、前記フロア部のうち、車幅方向における車室の中央又はその近傍位置に設けられているものである。 In each of the above support structures, the first shaft body extends from the inner wall portion of the vehicle body toward the vehicle interior, and the support portion is, on the floor portion, the center of the vehicle interior in the vehicle width direction or the center thereof. It is provided in the vicinity position.
　このような構造は、２列シートのリヤシートや、３列シートの第３列目のシートについて多く採用される。このような構造では、第１軸体に対してシートバックを傾けた状態で車体に組み付けることが求められる場合がある。従って、上述した各態様の支持構造は、このように第１軸体が車体の内壁部に設けられ、支持部が車体のフロア部に備えられる場合に特に有用となる。 構造 Such a structure is often used for a rear row of two-row seats and a third row of three-row seats. In such a structure, it may be required to assemble the vehicle body with the seat back inclined with respect to the first shaft body. Therefore, the support structure of each aspect described above is particularly useful when the first shaft body is provided on the inner wall portion of the vehicle body and the support portion is provided on the floor portion of the vehicle body.

Claims (5)

  1. 　可倒式のシートバックを有する車両用シートの支持構造であって、
    　車体に固定されて車幅方向に延びる軸体と、
    　前記シートバックの側面部に設けられた、車幅方向に延びる取付穴を有した球状体、および前記球状体の外周面に対応する断面円弧状の受け面を有しかつ当該受け面で前記球状体を転動可能に保持する保持部と、を備え、
    　前記シートバックは、前記取付穴に前記軸体が挿入されることにより、当該軸体を支点として前記車体に対して前後方向に揺動可能に支持されている、ことを特徴とする車両用シートの支持構造。     A vehicle seat support structure having a retractable seat back,
    A shaft fixed to the vehicle body and extending in the vehicle width direction;
    A spherical body provided on a side surface of the seat back and having a mounting hole extending in a vehicle width direction; and a receiving surface having an arc-shaped cross section corresponding to an outer peripheral surface of the spherical body, and the receiving surface having the spherical shape. A holding portion that holds the body so that it can roll,
    The vehicle seat, wherein the seatback is supported by the shaft body inserted into the mounting hole so as to be swingable in the front-rear direction with respect to the vehicle body with the shaft body serving as a fulcrum. Support structure.
  2. 　請求項１に記載の車両用シートの支持構造であって、
    　前記球状体は、前記取付穴の開口縁部に沿って形成されたボス部を備え、
    　前記保持部は、前記ボス部と係合することにより前記球状体の転動範囲を規制する規制部を備える、ことを特徴とする車両用シートの支持構造。     It is a support structure of the vehicle seat of Claim 1, Comprising:
    The spherical body includes a boss formed along an opening edge of the mounting hole,
    The support structure for a vehicle seat, wherein the holding portion includes a regulating portion that regulates a rolling range of the spherical body by engaging with the boss portion.
  3. 　請求項１又は２に記載の車両用シートの支持構造であって、
    　前記取付穴の端部であって、前記軸体の入口側となる端部の内周面には、当該取付穴の外側から内側に向かって内径が小さくなるテーパ部が設けられている、ことを特徴とする車両用シートの支持構造。     The vehicle seat support structure according to claim 1 or 2,
    At the end of the mounting hole, an inner peripheral surface of the end on the inlet side of the shaft body is provided with a tapered portion having an inner diameter that decreases from the outside to the inside of the mounting hole. A support structure for a vehicle seat, characterized in that:
  4. 　請求項１乃至３の何れか一項に記載の車両用シートの支持構造であって、
    　前記シートバックの側面部を第１側面部、前記軸体を第１軸体と各々定義したときに、
    　前記シートバックは、車幅方向における前記第１側面部とは反対側の第２側面部に、前記第１軸体と同一軸線上に沿って当該第２側面部から外向きに延びる第２軸体を備え、
    　前記車体のフロア部には、前記第２軸体を回動可能に支持する支持部が備えられ、
    　前記第２軸部には、前記支持部と係合することにより当該第２軸部が軸方向に変位することを規制する係合部が設けられている、ことを特徴とする車両用シートの支持構造。     It is a support structure of the vehicle seat according to any one of claims 1 to 3,
    When the side portion of the seatback is defined as a first side portion and the shaft body is defined as a first shaft body,
    The seat back has a second shaft extending outwardly from the second side surface along a same axis as the first shaft body on a second side surface opposite to the first side surface in the vehicle width direction. Equipped with a body,
    A support portion for rotatably supporting the second shaft body is provided on a floor portion of the vehicle body,
    The second shaft portion is provided with an engagement portion that regulates displacement of the second shaft portion in the axial direction by engaging with the support portion. Support structure.
  5. 　請求項４に記載の車両用シートの支持構造であって、
    　前記第１軸体は、車体の内壁部から車室内に向かって延びるものであり、
    　前記支持部は、前記フロア部のうち、車幅方向における車室の中央又はその近傍位置に設けられている、ことを特徴とする車両用シートの支持構造。     It is a support structure of the vehicle seat of Claim 4, Comprising:
    The first shaft body extends from the inner wall portion of the vehicle body toward the vehicle interior,
    The support structure for a vehicle seat, wherein the support portion is provided at a center or a position near the center of a vehicle room in a vehicle width direction on the floor portion.
PCT/JP2019/027221 2018-07-17 2019-07-09 Vehicle seat support structure WO2020017401A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014029178A (en) * 2012-07-31 2014-02-13 Ntn Corp Spherical slide bearing and method of manufacturing the same
JP5895743B2 (en) * 2012-07-04 2016-03-30 トヨタ紡織株式会社 Vehicle seat

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5895743B2 (en) * 2012-07-04 2016-03-30 トヨタ紡織株式会社 Vehicle seat
JP2014029178A (en) * 2012-07-31 2014-02-13 Ntn Corp Spherical slide bearing and method of manufacturing the same

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JP2020011578A (en) 2020-01-23

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