WO2020149077A1 - Seat frame and method for manufacturing same, and seat - Google Patents

Seat frame and method for manufacturing same, and seat Download PDF

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Publication number
WO2020149077A1
WO2020149077A1 PCT/JP2019/049512 JP2019049512W WO2020149077A1 WO 2020149077 A1 WO2020149077 A1 WO 2020149077A1 JP 2019049512 W JP2019049512 W JP 2019049512W WO 2020149077 A1 WO2020149077 A1 WO 2020149077A1
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WO
WIPO (PCT)
Prior art keywords
seat
frame
net structure
seat frame
frame according
Prior art date
Application number
PCT/JP2019/049512
Other languages
French (fr)
Japanese (ja)
Inventor
坂口将一
窪田恒行
Original Assignee
テイ・エス テック株式会社
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 テイ・エス テック株式会社 filed Critical テイ・エス テック株式会社
Publication of WO2020149077A1 publication Critical patent/WO2020149077A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • 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
    • B60N2/68—Seat frames

Definitions

  • the present disclosure relates to a lightweight and highly rigid seat frame, a manufacturing method thereof, and a seat.
  • a vehicle seat has a seat frame configured by connecting metal pipes by welding or the like (see, for example, JP-A-2016-199241).
  • seats used for vehicles such as vehicles are required to be lightweight and have high rigidity.
  • seats other than vehicles as long as they are lightweight and highly rigid, they are easy to move and easy to use.
  • the present disclosure proposes to provide a lightweight and highly rigid seat frame, a manufacturing method thereof, and a seat.
  • a seat frame having a seat cushion frame and a seat back frame is disclosed. At least a part of the seat cushion frame and the seat back frame has an annular net structure having a net-like annular shape.
  • the seat frame having such a configuration, by having at least a part of the ring-shaped net structure portion having a net-like ring shape, it is possible to achieve high rigidity while being lightweight.
  • the ring-shaped net structure part has an isotrus structure.
  • a plurality of annular net structure portions may be provided, and each of the ring-shaped axis lines may be linear.
  • the ring-shaped network structure part By designing the ring-shaped network structure part so that the ring-shaped axis is straight, that is, in the shape of a straight pipe, the ring-shaped network structure part can be easily designed. Then, by connecting the plurality of ring-shaped network structure portions by the non-net-shaped connection portion, it is possible to easily connect the linear portion forming the net to the connection portion, so that the ring-shaped network structure portions are easily connected to each other. be able to.
  • connection part may connect a plurality of ring-shaped network structure parts in different directions.
  • the ring-shaped net structure can be formed into a straight pipe shape, and a bent shape can be formed at the connection part, which facilitates the design and manufacturing of the seat frame.
  • the ring-shaped net structure and the connecting part may be integrally molded.
  • the basic structural part having the ring-shaped net structure part and the connection part can be made into an integrated high-rigidity member.
  • the ring net structure part and the connection part may be made of different materials.
  • connection part may be a hollow pipe shape.
  • the connecting part is a hollow pipe shape, it is possible to easily connect the ring net structure parts while making the connecting part lightweight and highly rigid.
  • the ring network structure part and the connection part may be arranged alternately.
  • the seat frame described above may further include a first pressure receiving member that is provided on the seat cushion frame or the seat back frame and receives a load from a seated person.
  • the first pressure receiving member may include a ring portion and a plurality of connecting members extending from the ring portion and connected to the seat back frame or the seat cushion frame.
  • the connecting member may be connected to the connecting portion.
  • the connecting member can be easily connected to the basic structure portion including the ring-shaped network structure portion and the connection portion.
  • the seat frame described above may further include a second pressure receiving member that is provided on the seat cushion frame or the seat back frame and receives a load from a seated person.
  • the second pressure receiving member may have a mesh plate shape.
  • the net shape of the second pressure receiving member allows the seat cushion frame or the seat back frame to be reinforced with a lightweight structure to have high rigidity.
  • the seat cushion frame or the seat back frame may have a cross member extending in the left-right direction.
  • the second pressure receiving member may have a main body portion connected to the cross member, and a reinforcing connection portion that branches from the main body portion toward the side opposite to the occupant and is connected to the cross member. Good.
  • the second pressure receiving member is connected to the occupant side of the cross member, and has the reinforcing connection portion that branches and extends toward the side opposite to the occupant of the cross member and connects to the cross member, It is possible to strengthen the connection between the second pressure receiving member and the cross member.
  • At least the ring-shaped net structure may be heat treated after molding.
  • the ring-shaped network structure can have higher rigidity.
  • the seat frame described above may further include a first member and a second member that is non-separably engaged with the first member and is movable relative to the first member.
  • each seat frame described above is characterized in that at least the ring-shaped net structure is molded by a metal three-dimensional printer.
  • the ring-shaped network structure part can be easily manufactured.
  • the first member and the second member be simultaneously molded by a metal three-dimensional printer.
  • the first member and the second member can be molded at one time, and the step of assembling is unnecessary.
  • a seat can be configured by including the seat frame described above, a pad covered by the seat frame, and a skin member that covers the pad.
  • FIG. 3A is a perspective view of the slide mechanism when the seat back is erected and is seen from the rear, and FIG. It is an exploded perspective view of a seat cushion frame.
  • FIG. 1 It is the figure which looked at a seat cushion frame from the upper part, and the center sectional view of a seat cushion frame (b). It is a perspective view explaining the 1st modification of the fixing structure of a pressure receiving member. It is a figure (a)-(f) explaining the structure and assembly procedure of the 1st modification of the fixing structure of a pressure receiving member. It is a perspective view (a) explaining the 2nd modification of the fixed structure of a pressure receiving member, its enlarged view (b), and the figure (c) of the form which made the 2nd modification a double structure. It is the perspective view (a) explaining the 3rd modification of the fixing structure of a pressure receiving member, the enlarged view (b) before the assembly, and the enlarged view (c) after the assembly.
  • a seat ST according to the present embodiment includes a seat frame S, a pad 2 (see FIG. 2) that covers the seat frame S and includes a urethane cushion, and a skin member 3 that covers the pad 2 ( 2) (see FIG. 2).
  • the seat ST is, for example, a vehicle seat applied to a rear seat of an automobile.
  • the seat frame S includes a seat cushion frame S1 and a seat back frame S2 rotatably coupled to a rear end portion of the seat cushion frame S1.
  • the seat cushion frame S1 and the seat back frame S2 have an annular net structure portion having a net-like annular shape at least in part.
  • the ring-shaped net structure portion means a structure in which, in at least one cross section, the net-shaped portion has a ring shape (closed cross-section structure by net).
  • the ring-shaped net structure portion may have, for example, a pipe shape or a bag shape.
  • the seat back frame S2 includes a pair of side frames 110 arranged apart from each other on the left and right sides, an upper cross member 120 that connects upper ends of the pair of side frames 110, and a lower cross member 130 that connects lower ends of the pair of side frames 110. And a frame-shaped basic structure portion is constituted.
  • the seat back frame S2 is composed of a lower frame 10 constituting the lower half and an upper frame 20 constituting the upper half.
  • the upper frame 20 is rotatably connected to the upper end of the lower frame 10. Specifically, the upper frame 20 is rotatable with respect to the lower frame 10 about the rotation axis X10 in FIG.
  • the lower frame 10 and the upper frame 20 are respectively provided with first pressure receiving members 60 and 70 which receive a load from a seated person.
  • a slider 80 which is engaged with a fixed rail 90 in a vertically slidable manner, is integrally fixed to the first pressure receiving member 70 of the upper frame 20.
  • the seat cushion frame S1 is composed of a rear frame 30 forming the rear half and a front frame 40 forming the front half.
  • the rear frame 30 and the front frame 40 are supported by a pair of left and right seat slide rails 50.
  • the seat slide rail 50 includes a lower rail 51 that extends in the front-rear direction and an upper rail 52 that is slidably engaged with the lower rail 51.
  • the upper rail 52 can be locked in position or unlocked from the lower rail 51 by a lock mechanism (not shown).
  • the rear frame 30 and the front frame 40 are both fixed to the upper rail 52 so that they can move together with the upper rail 52.
  • the lower rail 51 is fixed to the floor F of the automobile by a bracket 53.
  • the fixed rail 90 is fixed to the back panel B of the automobile.
  • the seat back frame S2 shown in FIG. 2(b) is lifted from the seat back frame S2 shown in FIG. 2(a). It can be changed to a lying state.
  • the angle of the lower frame 10 with respect to the horizontal plane becomes smaller than that in the state of FIG.
  • the upper end of the lower frame 10 moves downward, and the upper frame 20 is pulled by the lower frame 10 and moves downward.
  • the upper frame 20 moves downward together with the slider 80, and the slider 80 slides downward with respect to the fixed rail 90.
  • the lower frame 10 has a pair of annular net structure portions 12 that form a part of the pair of side frames 110 and an annular net structure portion 11 that forms a part of the lower cross member 130. doing. That is, a plurality of annular network structure parts 11 and 12 are provided. In the ring-shaped net structure parts 11 and 12, the ring-shaped axes X2 and X3 are linear, respectively.
  • the lower frame 10 includes a bent pipe 13 that is an example of a non-net-like connecting portion that connects a plurality of annular net structure portions 11 and 12.
  • the bent pipe 13 is a hollow pipe that is bent so that the axis lines at one end and the other end form 90 degrees with each other.
  • the ring-shaped net structure 11 is connected to one end of the bent pipe 13, and the ring-shaped net structure 12 is connected to the other end of the bent pipe 13, whereby the bent pipe 13 is different from the plurality of ring-shaped net structures 11 and 12. Connect in the direction. Then, by connecting the plurality of annular net structure portions 11 and 12 with the bent pipe 13, the annular net structure portions 11 and 12 and the bent pipe 13 are alternately arranged along the longitudinal direction thereof.
  • the ring-shaped net structure portions 11 and 12 and the bent pipe 13 are integrally formed.
  • a connecting end portion 14, a shaft support portion 15, and a truss bar 16 connecting the connecting end portion 14 and the shaft support portion 15 are provided on the annular net structure portion 12.
  • the connection end portion 14 is formed of a pipe having a closed end and not a mesh shape, and is connected to the upper end of the ring-shaped mesh structure portion 12.
  • the shaft support portion 15 is made of a plate-shaped metal facing in the left-right direction and has a shaft support hole 15A penetrating in the left-right direction.
  • the truss bar 16 is a rod configured by three-dimensionally joining truss structures in which a triangle is formed by a thin metal wire.
  • the lower frame 10 is provided with a first pressure receiving member 60 that receives a load from a seated person inside a basic structural portion surrounded by the side frame 110 and the lower cross member 130.
  • the first pressure receiving member 60 includes a ring portion 61 and a plurality of connecting members 62 extending from the ring 61 portion and connected to the lower frame 10 of the seatback frame S2.
  • the plurality of connecting members 62 are connected to the connecting end portion 14 and the bent pipe 13 that is the connecting portion, and are not connected to the ring-shaped net structure portions 11 and 12.
  • the connecting member 62 that is another member or another portion, which is different from the ring-shaped net structure portions 11 and 12 and the bent pipe 13 that is the connection part, is connected to the bent pipe 13 while avoiding the ring-shaped net structure portions 11 and 12. It is connected to the connection end portion 14.
  • the connecting member 62 can be easily connected to the basic structural portion formed by the ring-shaped net structure portions 11 and 12 and the bent pipe 13.
  • the ring-shaped network structure part 11 includes a central part 11A, a right part 11B arranged on the right side of the central part 11A, and a left part 11C arranged on the left side of the central part 11A.
  • the central portion 11A and the right side portion 11B are connected by a connecting bar 17 extending downward.
  • the central portion 11A and the left side portion 11C are connected by another connecting bar 17 extending downward.
  • connection bar 17 has a shaft support hole 17A penetrating left and right at the lower end (see also FIG. 4A).
  • Each part of the lower frame 10, including the first pressure receiving member 60, is made of the same metal material. And the whole is integrally molded by the metal three-dimensional printer. Therefore, even a complicated shape can be easily manufactured.
  • at least the ring-shaped net structure portions 11 and 12 can be easily manufactured by molding with a metal three-dimensional printer.
  • the ring net structure portions 11 and 12 may be formed by a metal three-dimensional printer, the other portions may be formed separately, and the ring net structure portions 11 and 12 may be joined to the other portions by welding or the like. ..
  • Both of the ring-shaped net structure parts 11 and 12 have an isotrus structure.
  • the iso-truss structure will be described by taking the annular net structure portion 11 enlarged and shown in FIG. 4B as a representative.
  • the isotrus structure is configured by three-dimensionally joining a truss structure in which a triangle is formed by a thin metal wire.
  • the isotrus structure includes an axial line 111, a cross line 112, and a pyramid truss 113.
  • the axial direction line 111 is a metal line extending in the axial direction along which the ring-shaped axis line X2 extends.
  • a plurality of the axial lines 111 are arranged side by side at equal intervals in the circumferential direction of the annular net structure portion 11. Although the number of the axial lines 111 is arbitrary, eight lines are arranged here as an example.
  • the cross wire 112 is made of a metal wire crossed in an X shape, and connects adjacent axial lines 111. Each end of the metal wire of the cross wire 112 is connected to an adjacent axial wire 111. A plurality of X-shaped cross lines 112 are arranged at predetermined intervals in the axial direction.
  • Pyramid truss 113 is a truss structure in which thin lines are arranged at the positions of the four ridges that gather at the apex of the pyramid (square pyramid).
  • the pyramid truss 113 connects adjacent axial lines 111. Further, the pyramid truss 113 is arranged between the adjacent cross lines 112 in the axial direction.
  • the pyramid truss 113 is arranged so as to project outward in the radial direction of the ring-shaped net structure portions 11 and 12, and each leg is connected to a connection point between the axial line 111 and the cross line 112.
  • the upper frame 20 includes a pair of annular net structure portions 21 that form a part of the pair of side frames 110, a pair of headrest guides 22, a bending pipe 23, a connecting bar 24, and a connecting end portion. 25, a shaft support portion 26, and a truss bar 27.
  • the upper frame 20 is entirely formed by a metal three-dimensional printer.
  • the annular network structure portion 21 has the same isotrus structure as the annular network structure portions 11 and 12 of the lower frame 10.
  • the ring-shaped axis line X4 is linear.
  • the headrest guide 22 is a rectangular pipe. As shown in the cross-sectional view of FIG. 5, in the headrest guide 22, three rectangular holes 22A are formed in the front wall 22F, and holes 22B and notches 22C are formed in the rear wall 22R at positions displaced from the holes 22A. ing. Returning to FIG. 3, the pair of headrest guides 22 are connected by an X-shaped metal wire 22X.
  • the bent pipe 23 is a hollow pipe bent so that the axis lines at one end and the other end form 90 degrees with each other.
  • the ring-shaped net structure portion 21 is connected to one end of the bent pipe 23.
  • the other end of the bent pipe 23 faces inward in the left-right direction and is closed.
  • connection bar 24 is composed of a plurality of metal wires, for example, three metal wires, one end of each metal wire is connected to the other end (end portion on the inside of the left and right) of the bent pipe 23, and the other end of each metal wire is a headrest. It is connected to the guide 22.
  • connection end portion 25 is formed of a pipe having a closed end and not a mesh shape, and is connected to the lower end of the ring-shaped net structure portion 21.
  • the shaft support portion 26 is made of a plate-shaped metal facing in the left-right direction, and has a shaft support hole 26A penetrating in the left-right direction.
  • the shaft support portion 26 is arranged below the connection end portion 25.
  • the truss bar 27 is a rod configured by three-dimensionally joining truss structures in which a triangle is formed by a thin metal wire. The truss bar 27 connects the connection end portion 25 and the shaft support portion 26.
  • the upper frame 20 is provided with a first pressure receiving member 70, which receives a load from a seated person, inside the basic structural portion surrounded by the side frame 110 and the upper cross member 120.
  • the first pressure receiving member 70 includes a ring portion 71 and a plurality of connecting members 72 extending from the ring 71 portion and connected to the upper frame 20 of the seatback frame S2.
  • the ring portion 71 and each bent pipe 23 are connected by two connecting members 72, respectively.
  • the connection end portion 25 and the ring portion 71 are connected by one connecting member 72, respectively.
  • the shaft support portion 26 and the ring portion 71 are connected to each other by one connecting member 72.
  • the X-shaped metal wire 22X and the ring portion 71 are connected by a single connecting member 72.
  • the connecting member 72 is connected to a non-mesh-shaped portion that avoids the annular net structure portion 21, so that the connecting member 72 is easily connected to the basic structural portion formed by the annular net structure portion 21, the bent pipe 23, and the like. be able to.
  • the slider 80 has a main body 81 and a vertically extending engagement portion 82 that projects rearward from the main body 81.
  • the left and right side surfaces 82 ⁇ /b>A of the engaging portion 82 project in a mountain shape.
  • the fixed rail 90 has a pair of vertically extending rail bars 91 at the left and right ends.
  • the fixed rail 90 is an example of a first member.
  • the pair of rail bars 91 are arranged apart from each other on the left and right, and a V-shaped groove 92 is formed on the surfaces facing each other.
  • the shape of the groove 92 corresponds to the shape of each side surface 82A of the engaging portion 82, and the engaging portion 82 is engaged between the pair of grooves 92.
  • the slider 80 has the engagement portion 82 slid on the rail bar 91 and is positioned above the fixed rail 90 shown in FIG. 7A, and the fixed rail 90 shown in FIG. 7B.
  • the slider 80 can be slid up and down with respect to the fixed rail 90 between the state of being located at the lower part of the.
  • the slider 80 is an example of the second member. Walls 93 (see FIG. 6) that prevent the engaging portions 82 of the slider 80 from coming off are provided at the upper and lower ends of the pair of rail bars 91. Therefore, the slider 80 is irremovably engaged with the fixed rail 90 and is movable relative to the fixed rail 90. Since the fixed rail 90 and the slider 80 cannot be separated from each other, they can be managed as an integrated component, and component management during manufacturing is easy.
  • Each part of the upper frame 20, including the first pressure receiving member 70, the slider 80 and the fixed rail 90, is made of the same metal material. And the whole is integrally molded by the metal three-dimensional printer. That is, the slider 80 and the fixed rail 90 are simultaneously molded by the metal three-dimensional printer. Therefore, even a complicated shape can be easily manufactured. Further, the fixed rail 90 and the slider 80 can be molded at one time, and the step of assembling them together is unnecessary.
  • the annular net structure portion 21 can be easily manufactured by molding at least the annular net structure portion 21 with a metal three-dimensional printer.
  • the ring net structure portion 21 may be formed by a metal three-dimensional printer, the other portions may be formed separately, and the ring net structure portion 21 and other portions may be joined by welding or the like.
  • the upper frame 20 is moved from the rear portion to the front portion by a metal three-dimensional printer.
  • the support member 22S that supports the front wall 22F can be formed, and the front wall 22F can be supported by the support member 22S.
  • the rear frame 30 of the seat cushion frame S1 includes a pair of side frames 31, a rear cross member 32, a front cross member 33, a second pressure receiving member 35, and a pair of connection bars 37. It is equipped with.
  • the pair of side frames 31 are arranged so as to be separated from each other on the left and right sides.
  • Each side frame 31 is provided with a fixing portion 31A that projects inward in the left-right direction.
  • the fixing portion 31A is formed with a hole 31B that penetrates vertically.
  • the fixing portions 31A are arranged on each of the side frames 31 such that two of the fixing portions are spaced apart from each other in the front-rear direction.
  • the side frame 31 is fixed to the upper rail 52 by passing a bolt through the hole 31B in each fixing portion 31A.
  • the rear cross member 32 is an example of a cross member that extends in the left-right direction, and connects the rear end portions of the pair of side frames 31.
  • the rear cross member 32 has a central portion 32A made of an iso-truss structure similar to the ring net structure portion 11, a right side portion 32B, and a left side portion 32C.
  • the central portion 32A and the right side portion 32B are connected to each other by a connecting bar 37 that extends upward and has a non-mesh shape.
  • the central portion 32A and the left side portion 32C are connected by another connecting bar 37 that extends upward and has a non-mesh shape.
  • the front cross member 33 is an example of a cross member that extends in the left-right direction, and connects the front end portions of the pair of side frames 31.
  • the front cross member 33 has a main body portion 33A that is long in the left and right direction and has a right side portion 33B that is formed of an isotrus structure similar to the annular net structure portion 11.
  • the main body portion 33A and the right side portion 33B are connected to each other by a connection block 33X which is not mesh-shaped.
  • the second pressure receiving member 35 is a member that receives a load from a seated person.
  • the second pressure receiving member 35 has a net-like plate shape by having a plurality of through holes 35A arranged side by side in the front and rear and in the left and right.
  • the second pressure receiving member 35 extends in the front-rear direction, is connected to the rear cross member 32 and the front cross member 33, and is bridged between the rear cross member 32 and the front cross member 33.
  • the second pressure receiving member 35 has a main body portion 35B, a front reinforcing connection portion 35D, and a rear reinforcing connection portion 35F.
  • the main body portion 35B constitutes the upper surface of the second pressure receiving member 35, is connected to the passenger side of the front cross member 33, and is connected to the passenger side of the rear cross member 32.
  • the front reinforcing connecting portion 35D extends from the front portion of the main body portion 35B in a branching manner on the side opposite to the occupant, and is connected to the front cross member 33.
  • the rear reinforcing connection portion 35F extends from the rear portion of the main body portion 35B in a branching manner on the side opposite to the occupant, and is connected to the rear cross member 32.
  • the front reinforcing connection part 35D and the rear reinforcing connection part 35F are examples of the reinforcing connection part.
  • connection bar 37 has a shaft support hole 37A penetrating left and right at the upper end portion.
  • the pair of connection bars 37 are connected to each other by two X-shaped metal wires 37X.
  • a shaft (not shown) is passed through the shaft support hole 37A of the connection bar 37 and the shaft support hole 17A of the connection bar 17 of the lower frame 10, whereby a seat back is provided with respect to the rear frame 30 of the seat cushion frame S1.
  • the lower frame 10 of the frame S2 is rotatable.
  • the side frame 31 the rear cross member 32, the front cross member 33, the second pressure receiving member 35, and the connection bar 37 are all integrally formed of the same metal material by a metal three-dimensional printer.
  • the front frame 40 of the seat cushion frame S1 includes a pair of side frames 41, a rear cross member 42, a front cross member 43, and a second pressure receiving member 45.
  • the pair of side frames 41 are arranged so as to be separated from each other on the left and right.
  • Each side frame 41 is provided with a fixing portion 41A that projects inward in the left-right direction.
  • the fixing portion 41A is formed with a hole 41B that penetrates vertically.
  • two fixing portions 41A are arranged on each side frame 41 so as to be separated from each other in the front-rear direction.
  • the side frame 41 is fixed to the upper rail 52 by passing a bolt through the hole 41B in each fixing portion 41A.
  • the rear cross member 42 is an example of a cross member that extends in the left-right direction, and connects the rear end portions of the pair of side frames 41.
  • the rear cross member 42 has a main body portion 42A made of an annular net structure portion having the same iso-truss structure as the annular net structure portion 11, an inclined portion 42B inclined upward to the right, and a right side portion 42C.
  • the main body 42A, the inclined portion 42B, and the right side portion 42C have a ring-shaped axis line that is linear.
  • the main body portion 42A and the inclined portion 42B are connected by a connection pipe 42X which is an example of a non-netlike connection portion.
  • connection pipe 42Y that is an example of a non-mesh connection portion.
  • connection pipe 42Y that is an example of a non-mesh connection portion.
  • the front cross member 43 is an example of a cross member that extends in the left-right direction, and connects the front end portions of the pair of side frames 41.
  • the front cross member 43 has a main body portion 43A made of an annular net structure portion having an iso-truss structure similar to the annular net structure portion 11, an inclined portion 43B inclined upward to the right, and a right side portion 43C.
  • the main body 43A, the inclined portion 43B, and the right side portion 43C each have a linear ring-shaped axis.
  • the main body portion 43A and the inclined portion 43B are connected by a connection pipe 43X which is an example of a non-netlike connection portion.
  • connection pipe 43Y as an example of a non-mesh-shaped connection portion.
  • the ring-shaped net structure portion and the non-netted connection pipes 43X and 43Y are alternately arranged along the longitudinal direction thereof.
  • Each annular net structure portion of the front cross member 43 and the connection pipes 43X and 43Y are integrally formed.
  • the second pressure receiving member 45 is a member that receives a load from a seated person.
  • the second pressure receiving member 45 has a net-like plate shape by having a plurality of triangular or quadrangular through holes 45A.
  • the second pressure receiving member 45 extends to the left and right, is connected to the rear cross member 42 and the front cross member 43, and is bridged between the rear cross member 42 and the front cross member 43.
  • the side frame 41, the rear cross member 42, the front cross member 43, and the second pressure receiving member 45 are all integrally formed of the same metal material by a metal three-dimensional printer.
  • the seat frame S having the above configuration, the following effects can be obtained.
  • a ring-shaped ring-shaped net structure part (ring-shaped net structure parts 11, 12, 21, rear cross members 32, 42, front cross members 33, 43) in a part, it is lightweight and has high rigidity.
  • the design of the ring-shaped net structure parts 11 and 12 can be facilitated.
  • the plurality of annular net structure portions 11 and 12 With the bent pipe 13 that is not mesh-like, it is possible to easily connect the linear portions that form the net to the bent pipe 13, and thus the annular net structure portion 11 , 12 can be easily connected to each other.
  • the connecting portion is the bent pipe 13
  • the annular net structure portions 11 and 12 have a linear pipe shape, and the bent portion of the bent pipe 13 can be formed. It can be easily designed and manufactured.
  • the connecting member 62 can be easily connected to the basic structural portion of the seatback frame S2. ..
  • annular net structure portions 11 and 12 are integrally formed with the bent pipe 13, so that the basic structural portion including the annular net structure portions 11 and 12 and the bent pipe 13 is made into an integrally high-rigidity member. be able to.
  • each part of the rear cross member 32 (center part 32A, right part 32B, left part 32C) and the connection bar 37 are integrally molded, and each part of the front cross member 33 (main part 33A, right part 33B, connection block 33X). ) Is integrally molded, the rear frame 30 can be made as an integrated member having high rigidity.
  • the front frame 40 by integrally molding the annular net structure portion and the connection portion, it is possible to form an integrated member having high rigidity.
  • connection pipes 42X, 42Y, 43X, 43Y are hollow pipe shapes, the ring net structure parts can be easily connected to each other while the connection part is lightweight and highly rigid.
  • the seat cushion frame S1 can be reinforced with a lightweight structure to have high rigidity.
  • the second pressure receiving member 35 is connected to the occupant side of the rear cross member 32, and also branches and extends toward the side of the rear cross member 32 opposite to the occupant and is connected to the rear cross member 32.
  • the connection between the second pressure receiving member 35 and the rear cross member 32 can be strengthened.
  • the second pressure receiving member 35 is connected to the occupant side of the front cross member 33, and branches and extends toward the side of the front cross member 33 opposite to the occupant to connect to the front cross member 33.
  • the connecting portion 35D the connection between the second pressure receiving member 35 and the front cross member 33 can be strengthened. That is, the second pressure receiving member 35 has a two-layer structure in which a part is divided into an upper part and a lower part, and thus has high rigidity.
  • the lower frame 10, the upper frame 20, and the rear frame 30 and the front frame 40 of the seat back frame S2, which are formed of the same material, respectively, are integrally formed. It may be composed of different materials.
  • the annular net structure portion and the connection portion may be made of different materials. Thereby, an appropriate material can be selected for each part.
  • the annular net structure portion is made of aluminum alloy and the connection portion is made of steel material, whereby the rigidity can be secured and the weight can be further reduced.
  • At least the ring-shaped net structure portion may be heat-treated after molding.
  • the structure can be made finer and the annular net structure portion can be made more rigid.
  • the first pressure receiving member having the ring portion is provided on the seat back frame, but it may be provided on the seat cushion frame. Further, although the net pressure plate-shaped second pressure receiving member is provided in the seat cushion frame, it may be provided in the seat back frame.
  • the connecting members 62 and 72 are connected by being integrally formed with the basic structural portion of the seatback frame S2, but they may be connected by assembling.
  • 10 to 13 are diagrams for explaining modified examples of the connecting method. Since this connecting method itself can be applied to a seat frame having no annular net structure portion, the seat frame having no annular net structure portion is shown in the drawing.
  • a hinge-type assembling member 260 is used at the tip of the connecting member 72 in order to connect the connecting member 72 to the seat back frame SB.
  • the pipe frame 200 of the seat back frame SB has a U-shape having left and right side frames 220 and an upper cross member 210 that connects upper ends of the side frames 220.
  • the pipe frame 200 does not have a mesh shape, but is formed by bending a single pipe into a U-shape.
  • the connection end member 250 is connected to the lower end of the side frame 220.
  • connection end member 250 has a circular protrusion 251 corresponding to the inner diameter of the pipe frame 200, as shown by cutting the end of one side frame 220, and the protrusion 251 is attached to the lower end of the side frame 220. It is assembled to the pipe frame 200 by being pressed into.
  • the assembly member 260 has a fixed portion 261 and a movable portion 262.
  • the fixing portion 261 includes a main body portion 261A having a semicircular groove 261G corresponding to the outer shape of the pipe frame 200 (upper cross member 210), and a hinge receiving portion 261B provided on one side of the groove 261G of the main body portion 261A. , And a lock portion 261D provided on the other side of the groove 261G.
  • the hinge receiving portion 261B has a hole 261C.
  • the lock portion 261D includes a semi-cylindrical shaft portion 261E and a semi-elliptical engagement portion 261F provided at the tip of the shaft portion 261E and having a diameter larger than that of the shaft portion 261E.
  • the movable portion 262 has a main body portion 262A having a semicircular groove 262G corresponding to the outer shape of the pipe frame 200 (upper cross member 210), a hinge portion 262B provided on one side of the groove 262G of the main body portion 262A, It has a lock portion 262D provided on the other side of the groove 262G.
  • the hinge portion 262B has a columnar shaft portion 262C corresponding to the hole 261C.
  • the lock part 262D has a semi-cylindrical shaft part 262E and a semi-elliptical engagement part 262F provided at the tip of the shaft part 262E and having a diameter larger than that of the shaft part 262E.
  • the assembling member 260 is assembled to the pipe frame 200 (upper cross member 210), first, as shown in FIG. 11A, the groove 261G of the fixing portion 261 is aligned with the outer periphery of the pipe frame 200. Then, as shown in FIG. 11B, the shaft portion 262C is inserted into the hole 261C. Further, as shown in FIG. 11C, the movable portion 262 is rotated to align the groove 262G with the pipe frame 200.
  • the shaft portion 261E and the shaft portion 262E are combined to form a columnar shape, and the engagement portion 261F and the engagement portion 262F are combined to form an elliptical shape.
  • the engaging portions 261F and 262F which are formed into an elliptical shape by being combined with each other, are passed through the elliptical through hole 263A formed in the lock plate 263. Then, by rotating the lock plate 263 by 90 degrees, the long axis of the elliptical through hole 263A and the long axes of the engaging portions 261F and 262F are orthogonal to each other as shown in FIG.
  • the movable part 262 is also fixed from the fixed part 261. In this way, the assembly member 260 can be assembled to the pipe frame 200.
  • a C-shaped assembling member 360 is provided at the tip of the connecting member 72. Can be used.
  • the assembling member 360 has a constant C-shaped cross section and has a slit 365.
  • Each tip on the slit 365 side of the assembling member 360 has a tapered surface 361 that expands toward the outside.
  • the assembling member 360 is made of a flexible material, and the slit 365 can elastically expand to the diameter of the pipe frame 200. Therefore, by pressing the tapered surface 361 against the pipe frame 200, the assembling member 360 elastically spreads and the assembling member 360 can be fitted to the outer periphery of the pipe frame 200.
  • the assembly member of the second modified example may have a double structure in which two C-shaped main body portions 362B are connected by a connection portion 363C as in an assembly member 360B shown in FIG. 12(c). it can. By doing so, the assembling member 360B can be more firmly assembled to the pipe frame 200.
  • a caulking type assembling member 460 is provided at the tip of the connecting member 72. Can be used.
  • the assembling member 460 is configured to have a main body portion 461 having a semicircular groove 461G and two deformation walls 462 extending from the main body portion 461 before the assembling. There is.
  • the two deformation walls 462 are parallel to each other.
  • a projection 462A and a groove 462B are formed at the tip of the deformation wall 462.
  • the protrusion 462A of the one deformation wall 462 is located at a position corresponding to the groove 462B of the other deformation wall 462 in the axial direction of the groove 461G.
  • the outer periphery of the pipe frame 200 is aligned with the semicircular groove 461G.
  • a caulking jig 465 having a semicircular groove 465G is prepared, and the groove 465G is pressed against the two deformation walls 462 from the tip side of the deformation wall 462.
  • the deformation wall 462 is deformed into a semi-cylindrical shape, and the deformation wall 462 is held and fixed to the pipe frame 200.
  • the protrusion 462A at the tip of the deformation wall 462 and the groove 462B are engaged with each other, so that the assembly member 460 is firmly fixed to the pipe frame 200.
  • the seat frame having the ring-shaped net structure part is applied to the vehicle seat of the rear seat has been described, but a similar seat frame may be applied to the front seat of the vehicle, It may be applied to vehicle seats other than vehicles. Further, it may be a seat other than a vehicle, for example, a seat installed in a general home or a welfare facility.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Provided are a lightweight and highly rigid seat frame (S) and seat (ST). The seat frame (S) has a seat cushion frame (S1) and a seat back frame (S2). The seat cushion frame (S1) and the seat back frame (S2) have, at least in part, an annular net structure (11, 12, 21, 32, 33, 42, 43) having a net-like annular shape. The annular net structure preferably comprises an Iso Truss structure.

Description

シートフレームおよびその製造方法ならびにシートSeat frame, manufacturing method thereof, and seat
　本開示は、軽量かつ高剛性なシートフレームおよびその製造方法ならびにシートに関する。 The present disclosure relates to a lightweight and highly rigid seat frame, a manufacturing method thereof, and a seat.
　一般に、車両のシートは、金属製のパイプを溶接等により接続してシートフレームが構成されている（例えば、特開２０１６－１９９２４１号公報参照）。 Generally, a vehicle seat has a seat frame configured by connecting metal pipes by welding or the like (see, for example, JP-A-2016-199241).
　ところで、車両等の乗物に用いられるシートは、軽量であるとともに、高い剛性を有することが求められる。また、乗物以外のシートにおいても、軽量かつ高剛性のシートであれば、動かしやすく、使い勝手が良い。 By the way, seats used for vehicles such as vehicles are required to be lightweight and have high rigidity. In addition, even for seats other than vehicles, as long as they are lightweight and highly rigid, they are easy to move and easy to use.
　そこで、本開示は、軽量かつ高剛性なシートフレームおよびその製造方法ならびにシートを提供することを提案する。 Therefore, the present disclosure proposes to provide a lightweight and highly rigid seat frame, a manufacturing method thereof, and a seat.
　また、軽量かつ高剛性なシートフレームの設計または製造を容易にする構成を提案する。 Also, we propose a configuration that facilitates the design or manufacture of a lightweight and highly rigid seat frame.
　シートクッションフレームと、シートバックフレームとを有するシートフレームを開示する。シートクッションフレームおよびシートバックフレームの少なくとも一部に、網状の環形状を有する環状網構造部を有する。 A seat frame having a seat cushion frame and a seat back frame is disclosed. At least a part of the seat cushion frame and the seat back frame has an annular net structure having a net-like annular shape.
　このような構成のシートフレームによれば、網状の環形状からなる環状網構造部を少なくとも一部に有することにより、軽量でありながら高剛性にすることができる。 According to the seat frame having such a configuration, by having at least a part of the ring-shaped net structure portion having a net-like ring shape, it is possible to achieve high rigidity while being lightweight.
　前記したシートフレームにおいて、環状網構造部は、アイソトラス構造からなっていることが望ましい。 ▽ In the seat frame described above, it is desirable that the ring-shaped net structure part has an isotrus structure.
　環状網構造部にアイソトラス構造を採用することで、軽量でありながら高剛性のシートフレームにすることができる。 By adopting an isotrus structure for the ring-shaped net structure, it is possible to make a seat frame that is lightweight yet highly rigid.
　前記したシートフレームにおいて、環状網構造部は、複数設けられ、それぞれ、環形状の軸線が直線状であってもよい。この場合に、複数の環状網構造部を接続する、網状ではない接続部をさらに備えることが望ましい。 In the seat frame described above, a plurality of annular net structure portions may be provided, and each of the ring-shaped axis lines may be linear. In this case, it is desirable to further include a non-mesh-shaped connecting portion that connects the plurality of annular net structure portions.
　環状網構造部を、環形状の軸線が直線状、つまり、直線状のパイプ形状とすることで、環状網構造部の設計を容易にすることができる。そして、網状ではない接続部によって複数の環状網構造部を接続することで、網を構成する線状部分を容易に接続部に接続することができるので、環状網構造部同士を容易に接続することができる。 　By designing the ring-shaped network structure part so that the ring-shaped axis is straight, that is, in the shape of a straight pipe, the ring-shaped network structure part can be easily designed. Then, by connecting the plurality of ring-shaped network structure portions by the non-net-shaped connection portion, it is possible to easily connect the linear portion forming the net to the connection portion, so that the ring-shaped network structure portions are easily connected to each other. be able to.
　接続部は、複数の環状網構造部を互いに異なる向きで接続してもよい。 The connection part may connect a plurality of ring-shaped network structure parts in different directions.
　このような構造によれば、環状網構造部は直線状のパイプ形状とし、接続部の部分で曲がった形状を作ることができ、シートフレームの設計と製造を容易にすることができる。 According to such a structure, the ring-shaped net structure can be formed into a straight pipe shape, and a bent shape can be formed at the connection part, which facilitates the design and manufacturing of the seat frame.
　前記した接続部を有するシートフレームにおいて、環状網構造部および接続部とは別の、他の部材または他の部分が、接続部に繋がり、環状網構造部には繋がっていないのが望ましい。 In the seat frame having the above-mentioned connecting portion, it is desirable that another member or another portion other than the annular net structure portion and the connecting portion is connected to the connecting portion and is not connected to the annular net structure portion.
　このようなシートフレームによれば、他の部材または他の部分を、環状網構造部と接続部により構成された基本構造部分に容易に繋ぐことができる。 According to such a seat frame, other members or other parts can be easily connected to the basic structure part composed of the ring-shaped net structure part and the connection part.
　環状網構造部と接続部とは一体に成形されていてもよい。 The ring-shaped net structure and the connecting part may be integrally molded.
　このような構成によれば環状網構造部と接続部を有してなる基本構造部分を一体的な高剛性の部材とすることができる。 According to such a configuration, the basic structural part having the ring-shaped net structure part and the connection part can be made into an integrated high-rigidity member.
　環状網構造部と接続部とは異なる材料からなっていてもよい。 　The ring net structure part and the connection part may be made of different materials.
　接続部は、中空のパイプ形状であってもよい。 The connection part may be a hollow pipe shape.
　接続部が中空のパイプ形状であることで接続部を軽量で高剛性としながら、環状網構造部同士を容易に接続することができる。 　Because the connecting part is a hollow pipe shape, it is possible to easily connect the ring net structure parts while making the connecting part lightweight and highly rigid.
　環状網構造部と接続部は、交互に配置されていてもよい。 ㆍThe ring network structure part and the connection part may be arranged alternately.
　前記したシートフレームは、シートクッションフレームまたはシートバックフレームに設けられた着座者からの荷重を受ける第１受圧部材をさらに備えていてもよい。この場合、第１受圧部材は、リング部と、リング部から延び、シートバックフレームまたはシートクッションフレームに繋がった複数の連結部材とを有することができる。 The seat frame described above may further include a first pressure receiving member that is provided on the seat cushion frame or the seat back frame and receives a load from a seated person. In this case, the first pressure receiving member may include a ring portion and a plurality of connecting members extending from the ring portion and connected to the seat back frame or the seat cushion frame.
　連結部材は、接続部に繋がっていてもよい。 The connecting member may be connected to the connecting portion.
　この構成によれば、連結部材を、環状網構造部と接続部により構成された基本構造部分に容易に繋ぐことができる。 According to this configuration, the connecting member can be easily connected to the basic structure portion including the ring-shaped network structure portion and the connection portion.
　前記したシートフレームは、シートクッションフレームまたはシートバックフレームに設けられた着座者からの荷重を受ける第２受圧部材をさらに備えていてもよい。この場合、第２受圧部材は、網状の板形状を有していてもよい。 The seat frame described above may further include a second pressure receiving member that is provided on the seat cushion frame or the seat back frame and receives a load from a seated person. In this case, the second pressure receiving member may have a mesh plate shape.
　第２受圧部材が網状の板形状であることで、シートクッションフレームまたはシートバックフレームを軽量な構造で補強し、高剛性にすることができる。 The net shape of the second pressure receiving member allows the seat cushion frame or the seat back frame to be reinforced with a lightweight structure to have high rigidity.
　前記したシートフレームにおいて、シートクッションフレームまたはシートバックフレームは、左右方向に延びるクロスメンバを有していてもよい。この場合、第２受圧部材は、クロスメンバに接続される本体部と、前記本体部から乗員とは反対側に向けて枝分かれして延び、クロスメンバに接続する補強接続部を有していてもよい。 In the above seat frame, the seat cushion frame or the seat back frame may have a cross member extending in the left-right direction. In this case, the second pressure receiving member may have a main body portion connected to the cross member, and a reinforcing connection portion that branches from the main body portion toward the side opposite to the occupant and is connected to the cross member. Good.
　このように、第２受圧部材が、クロスメンバの乗員側に接続されるとともに、クロスメンバの乗員とは反対側に向けて枝分かれして延び、クロスメンバに接続する補強接続部を有することで、第２受圧部材とクロスメンバの接続を強固にすることができる。 In this way, the second pressure receiving member is connected to the occupant side of the cross member, and has the reinforcing connection portion that branches and extends toward the side opposite to the occupant of the cross member and connects to the cross member, It is possible to strengthen the connection between the second pressure receiving member and the cross member.
　前記したシートフレームは、少なくとも環状網構造部が成形後に熱処理されていてもよい。 In the seat frame described above, at least the ring-shaped net structure may be heat treated after molding.
　このような構成によれば、環状網構造部をより高剛性にすることができる。 With such a configuration, the ring-shaped network structure can have higher rigidity.
　前記したシートフレームは、第１部材と、第１部材に対し離脱不能に係合して第１部材に対して相対移動可能な第２部材と、をさらに備えることができる。 The seat frame described above may further include a first member and a second member that is non-separably engaged with the first member and is movable relative to the first member.
　このような構成によれば、第１部材と第２部材とを、一体の部品として管理することができ、製造時の部品管理が容易である。 With such a configuration, it is possible to manage the first member and the second member as an integrated part, and it is easy to manage parts during manufacturing.
　前記した各シートフレームの製造方法は、少なくとも環状網構造部を金属３次元プリンタにより成形することを特徴とする。 The manufacturing method of each seat frame described above is characterized in that at least the ring-shaped net structure is molded by a metal three-dimensional printer.
　このような製造方法によれば、環状網構造部を容易に製造することができる。 According to such a manufacturing method, the ring-shaped network structure part can be easily manufactured.
　前記した第１部材および第２部材を備えるシートフレームの製造方法は、第１部材および第２部材を、金属３次元プリンタにより同時に成形することが望ましい。 In the method of manufacturing the seat frame including the first member and the second member described above, it is desirable that the first member and the second member be simultaneously molded by a metal three-dimensional printer.
　このような製造方法によれば、第１部材および第２部材を一度に成形でき、組み立てる工程が不要である。 According to such a manufacturing method, the first member and the second member can be molded at one time, and the step of assembling is unnecessary.
　また、前記したシートフレームと、シートフレームに被せられたパッドと、パッドを覆う表皮部材とを備えてシートを構成することもできる。 Also, a seat can be configured by including the seat frame described above, a pad covered by the seat frame, and a skin member that covers the pad.
　前記したシートフレームを備えるものとすることで、軽量かつ高剛性なシートを提供することができる。また、このような軽量かつ高剛性なシートの設計、製造を容易にすることができる。 By providing the seat frame described above, it is possible to provide a lightweight and highly rigid seat. Further, it is possible to easily design and manufacture such a lightweight and highly rigid sheet.
シートフレームの斜視図である。It is a perspective view of a seat frame. シートバックを立てた状態のシートフレームの側面図（ａ）と、シートバックを寝かせた状態のシートフレームの側面図（ｂ）である。It is the side view (a) of the seat frame in the state where the seat back was erected, and the side view (b) of the seat frame in the state where the seat back was laid down. シートバックフレームの分解斜視図である。It is an exploded perspective view of a seat back frame. ロアクロスメンバの拡大図（ａ）と、アイソトラス構造の拡大図（ｂ）である。It is an enlarged view of a lower cross member (a) and an enlarged view of an isotrus structure (b). ヘッドレストガイドの縦断面図である。It is a longitudinal cross-sectional view of a headrest guide. スライド機構の拡大断面図である。It is an expanded sectional view of a slide mechanism. シートバックを立てた状態におけるスライド機構を後から見た斜視図（ａ）と、シートバックを寝かせた状態におけるスライド機構を後から見た斜視図（ｂ）である。FIG. 3A is a perspective view of the slide mechanism when the seat back is erected and is seen from the rear, and FIG. シートクッションフレームの分解斜視図である。It is an exploded perspective view of a seat cushion frame. シートクッションフレームを上から見た図（ａ）と、シートクッションフレームの中央断面図（ｂ）である。It is the figure which looked at a seat cushion frame from the upper part, and the center sectional view of a seat cushion frame (b). 受圧部材の固定構造の第１変形例を説明する斜視図である。It is a perspective view explaining the 1st modification of the fixing structure of a pressure receiving member. 受圧部材の固定構造の第１変形例の構造と組立手順を説明する図（ａ）～（ｆ）である。It is a figure (a)-(f) explaining the structure and assembly procedure of the 1st modification of the fixing structure of a pressure receiving member. 受圧部材の固定構造の第２変形例を説明する斜視図（ａ）と、その拡大図（ｂ）と、第２変形例を二連構造にした形態の図（ｃ）である。It is a perspective view (a) explaining the 2nd modification of the fixed structure of a pressure receiving member, its enlarged view (b), and the figure (c) of the form which made the 2nd modification a double structure. 受圧部材の固定構造の第３変形例を説明する斜視図（ａ）と、その組付前の拡大図（ｂ）と、組付後の拡大図（ｃ）である。It is the perspective view (a) explaining the 3rd modification of the fixing structure of a pressure receiving member, the enlarged view (b) before the assembly, and the enlarged view (c) after the assembly.
　次に、一実施形態について、適宜図面を参照しながら詳細に説明する。
　図１に示すように、本実施形態のシートＳＴは、シートフレームＳと、シートフレームＳに被せられた、ウレタンクッションなどからなるパッド２（図２参照）と、パッド２を覆う表皮部材３（図２参照）とを備えて構成されている。シートＳＴは、一例として、自動車の後部座席に適用される車両用シートである。 Next, one embodiment will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, a seat ST according to the present embodiment includes a seat frame S, a pad 2 (see FIG. 2) that covers the seat frame S and includes a urethane cushion, and a skin member 3 that covers the pad 2 ( 2) (see FIG. 2). The seat ST is, for example, a vehicle seat applied to a rear seat of an automobile.
　シートフレームＳは、シートクッションフレームＳ１と、シートクッションフレームＳ１の後端部に回動可能に結合されたシートバックフレームＳ２とを有してなる。シートクッションフレームＳ１およびシートバックフレームＳ２は、少なくとも一部に網状の環形状を有する環状網構造部を有する。本明細書でいう環状網構造部は、少なくとも１の断面において、網状の部分が環形状（網による閉断面構造）を有している構造をいうものとする。環状網構造部は、例えば、パイプ状であってもよいし、袋状であってもよい。 The seat frame S includes a seat cushion frame S1 and a seat back frame S2 rotatably coupled to a rear end portion of the seat cushion frame S1. The seat cushion frame S1 and the seat back frame S2 have an annular net structure portion having a net-like annular shape at least in part. In the present specification, the ring-shaped net structure portion means a structure in which, in at least one cross section, the net-shaped portion has a ring shape (closed cross-section structure by net). The ring-shaped net structure portion may have, for example, a pipe shape or a bag shape.
　シートバックフレームＳ２は、左右に互いに離れて配置された一対のサイドフレーム１１０と、一対のサイドフレーム１１０の上端をつなぐアッパークロスメンバ１２０と、一対のサイドフレーム１１０の下端をつなぐロアクロスメンバ１３０とを有して、枠状の基本構造部分が構成されている。 The seat back frame S2 includes a pair of side frames 110 arranged apart from each other on the left and right sides, an upper cross member 120 that connects upper ends of the pair of side frames 110, and a lower cross member 130 that connects lower ends of the pair of side frames 110. And a frame-shaped basic structure portion is constituted.
　シートバックフレームＳ２は、下半分を構成するロアフレーム１０と、上半分を構成するアッパーフレーム２０とから構成されている。アッパーフレーム２０は、ロアフレーム１０の上端部に回動可能に連結されている。具体的に、アッパーフレーム２０は、ロアフレーム１０に対し、図１における回動軸Ｘ１０を中心に回動可能となっている。 The seat back frame S2 is composed of a lower frame 10 constituting the lower half and an upper frame 20 constituting the upper half. The upper frame 20 is rotatably connected to the upper end of the lower frame 10. Specifically, the upper frame 20 is rotatable with respect to the lower frame 10 about the rotation axis X10 in FIG.
　ロアフレーム１０およびアッパーフレーム２０は、それぞれ、着座者からの荷重を受ける第１受圧部材６０，７０が設けられている。アッパーフレーム２０の第１受圧部材７０には、固定レール９０に対して上下にスライド移動可能に係合したスライダ８０が一体に固定されている。 The lower frame 10 and the upper frame 20 are respectively provided with first pressure receiving members 60 and 70 which receive a load from a seated person. A slider 80, which is engaged with a fixed rail 90 in a vertically slidable manner, is integrally fixed to the first pressure receiving member 70 of the upper frame 20.
　シートクッションフレームＳ１は、後半分を構成するリアフレーム３０と、前半分を構成するフロントフレーム４０とから構成されている。リアフレーム３０とフロントフレーム４０は、左右一対のシートスライドレール５０により支持されている。具体的に、シートスライドレール５０は、前後に延びるロアレール５１と、ロアレール５１に対してスライド移動可能に係合したアッパーレール５２とを有してなる。アッパーレール５２は、公知のように、図示しないロック機構によってロアレール５１に対して、位置をロックし、またはそのロックを解除できるようになっている。リアフレーム３０およびフロントフレーム４０は、ともにアッパーレール５２に固定されることで、アッパーレール５２とともに移動するようになっている。 The seat cushion frame S1 is composed of a rear frame 30 forming the rear half and a front frame 40 forming the front half. The rear frame 30 and the front frame 40 are supported by a pair of left and right seat slide rails 50. Specifically, the seat slide rail 50 includes a lower rail 51 that extends in the front-rear direction and an upper rail 52 that is slidably engaged with the lower rail 51. As is well known, the upper rail 52 can be locked in position or unlocked from the lower rail 51 by a lock mechanism (not shown). The rear frame 30 and the front frame 40 are both fixed to the upper rail 52 so that they can move together with the upper rail 52.
　図２（ａ）に示すように、ロアレール５１は、ブラケット５３によって自動車のフロアＦに固定されている。また、固定レール９０は、自動車のバックパネルＢに固定されている。そして、アッパーレール５２をロアレール５１に対して前方にスライド移動させることで、図２（ａ）に示したシートバックフレームＳ２を立てた状態から、図２（ｂ）に示したシートバックフレームＳ２を寝かせた状態に変えることができるようになっている。このとき、ロアフレーム１０の下端が前方に移動することでロアフレーム１０が図２（ａ）の状態よりも水平面に対する角度が小さくなる。そして、ロアフレーム１０の上端は、下に移動し、アッパーフレーム２０は、ロアフレーム１０に引っ張られて下に移動する。アッパーフレーム２０は、スライダ８０とともに下に移動し、スライダ８０は、固定レール９０に対して下にスライド移動する。 As shown in FIG. 2A, the lower rail 51 is fixed to the floor F of the automobile by a bracket 53. The fixed rail 90 is fixed to the back panel B of the automobile. Then, by sliding the upper rail 52 forward with respect to the lower rail 51, the seat back frame S2 shown in FIG. 2(b) is lifted from the seat back frame S2 shown in FIG. 2(a). It can be changed to a lying state. At this time, since the lower end of the lower frame 10 moves forward, the angle of the lower frame 10 with respect to the horizontal plane becomes smaller than that in the state of FIG. Then, the upper end of the lower frame 10 moves downward, and the upper frame 20 is pulled by the lower frame 10 and moves downward. The upper frame 20 moves downward together with the slider 80, and the slider 80 slides downward with respect to the fixed rail 90.
　次にシートバックフレームＳ２とシートクッションフレームＳ１の詳細な構造について説明する。 Next, detailed structures of the seat back frame S2 and the seat cushion frame S1 will be described.
　図３に示すように、ロアフレーム１０は、一対のサイドフレーム１１０の一部を構成する一対の環状網構造部１２と、ロアクロスメンバ１３０の一部を構成する環状網構造部１１とを有している。すなわち、環状網構造部１１，１２は、複数設けられている。環状網構造部１１，１２は、それぞれ、環形状の軸線Ｘ２，Ｘ３が直線状である。 As shown in FIG. 3, the lower frame 10 has a pair of annular net structure portions 12 that form a part of the pair of side frames 110 and an annular net structure portion 11 that forms a part of the lower cross member 130. doing. That is, a plurality of annular network structure parts 11 and 12 are provided. In the ring-shaped net structure parts 11 and 12, the ring-shaped axes X2 and X3 are linear, respectively.
　ロアフレーム１０は、複数の環状網構造部１１，１２を接続する、網状ではない接続部の一例である屈曲パイプ１３を備える。屈曲パイプ１３は、一端と他端の軸線が、互いに９０度をなすように屈曲した中空のパイプである。屈曲パイプ１３の一端には、環状網構造部１１が接続され、他端には、環状網構造部１２が接続され、これにより、屈曲パイプ１３は、複数の環状網構造部１１，１２を異なる向きで接続している。そして、複数の環状網構造部１１，１２を屈曲パイプ１３が接続することで、環状網構造部１１，１２と屈曲パイプ１３はこれらの長手方向に沿って交互に配置されている。環状網構造部１１，１２と屈曲パイプ１３とは、一体に成形されている。 The lower frame 10 includes a bent pipe 13 that is an example of a non-net-like connecting portion that connects a plurality of annular net structure portions 11 and 12. The bent pipe 13 is a hollow pipe that is bent so that the axis lines at one end and the other end form 90 degrees with each other. The ring-shaped net structure 11 is connected to one end of the bent pipe 13, and the ring-shaped net structure 12 is connected to the other end of the bent pipe 13, whereby the bent pipe 13 is different from the plurality of ring-shaped net structures 11 and 12. Connect in the direction. Then, by connecting the plurality of annular net structure portions 11 and 12 with the bent pipe 13, the annular net structure portions 11 and 12 and the bent pipe 13 are alternately arranged along the longitudinal direction thereof. The ring-shaped net structure portions 11 and 12 and the bent pipe 13 are integrally formed.
　環状網構造部１２の上には、接続端部１４と、軸支部１５と、接続端部１４と軸支部１５を連結するトラスバー１６とが設けられている。
　接続端部１４は、網状ではない、一端が閉じたパイプからなり、環状網構造部１２の上端に接続されている。
　軸支部１５は、左右方向に向いた板形状の金属からなり、左右に貫通する軸支穴１５Ａを有している。
　トラスバー１６は、細い金属線で三角形を形成したトラス構造を立体的に接合することにより構成された棒である。 A connecting end portion 14, a shaft support portion 15, and a truss bar 16 connecting the connecting end portion 14 and the shaft support portion 15 are provided on the annular net structure portion 12.
The connection end portion 14 is formed of a pipe having a closed end and not a mesh shape, and is connected to the upper end of the ring-shaped mesh structure portion 12.
The shaft support portion 15 is made of a plate-shaped metal facing in the left-right direction and has a shaft support hole 15A penetrating in the left-right direction.
The truss bar 16 is a rod configured by three-dimensionally joining truss structures in which a triangle is formed by a thin metal wire.
　ロアフレーム１０は、サイドフレーム１１０とロアクロスメンバ１３０により囲まれる基本構造部分の内側に、着座者からの荷重を受ける第１受圧部材６０が設けられている。
　第１受圧部材６０は、リング部６１と、リング６１部から延び、シートバックフレームＳ２のロアフレーム１０に繋がった複数の連結部材６２とを有してなる。複数の連結部材６２は、接続端部１４と、接続部である屈曲パイプ１３に繋がり、環状網構造部１１，１２には繋がっていない。すなわち、環状網構造部１１，１２および接続部である屈曲パイプ１３とは別の、他の部材または他の部分である連結部材６２は、環状網構造部１１，１２を避けて屈曲パイプ１３と接続端部１４に繋がっている。これにより、連結部材６２を、環状網構造部１１，１２と屈曲パイプ１３により構成された基本構造部分に容易に繋ぐことができる。 The lower frame 10 is provided with a first pressure receiving member 60 that receives a load from a seated person inside a basic structural portion surrounded by the side frame 110 and the lower cross member 130.
The first pressure receiving member 60 includes a ring portion 61 and a plurality of connecting members 62 extending from the ring 61 portion and connected to the lower frame 10 of the seatback frame S2. The plurality of connecting members 62 are connected to the connecting end portion 14 and the bent pipe 13 that is the connecting portion, and are not connected to the ring-shaped net structure portions 11 and 12. That is, the connecting member 62 that is another member or another portion, which is different from the ring-shaped net structure portions 11 and 12 and the bent pipe 13 that is the connection part, is connected to the bent pipe 13 while avoiding the ring-shaped net structure portions 11 and 12. It is connected to the connection end portion 14. As a result, the connecting member 62 can be easily connected to the basic structural portion formed by the ring-shaped net structure portions 11 and 12 and the bent pipe 13.
　環状網構造部１１は、中央部１１Ａと、中央部１１Ａの右側に配置された右側部１１Ｂと、中央部１１Ａの左側に配置された左側部１１Ｃとを含んでなる。中央部１１Ａと右側部１１Ｂとは、下方に延びる接続バー１７により接続されている。中央部１１Ａと左側部１１Ｃとは、下方に延びる他の接続バー１７により接続されている。 The ring-shaped network structure part 11 includes a central part 11A, a right part 11B arranged on the right side of the central part 11A, and a left part 11C arranged on the left side of the central part 11A. The central portion 11A and the right side portion 11B are connected by a connecting bar 17 extending downward. The central portion 11A and the left side portion 11C are connected by another connecting bar 17 extending downward.
　接続バー１７は、下端部に、左右に貫通する軸支穴１７Ａを有している（図４（ａ）も参照）。 The connection bar 17 has a shaft support hole 17A penetrating left and right at the lower end (see also FIG. 4A).
　ロアフレーム１０を構成する各部分は、第１受圧部材６０を含めて、すべて同じ金属材料により形成されている。そして、全体が、金属３次元プリンタにより一体に成形されている。このため、複雑な形状であっても、容易に製造することができる。特に、少なくとも環状網構造部１１，１２を金属３次元プリンタにより成形することで環状網構造部１１，１２を容易に製造することができる。例えば、環状網構造部１１，１２を、金属３次元プリンタにより成形し、他の部分は、それぞれ別に成形し、環状網構造部１１，１２と他の部分とを溶接等により接合してもよい。 Each part of the lower frame 10, including the first pressure receiving member 60, is made of the same metal material. And the whole is integrally molded by the metal three-dimensional printer. Therefore, even a complicated shape can be easily manufactured. In particular, at least the ring-shaped net structure portions 11 and 12 can be easily manufactured by molding with a metal three-dimensional printer. For example, the ring net structure portions 11 and 12 may be formed by a metal three-dimensional printer, the other portions may be formed separately, and the ring net structure portions 11 and 12 may be joined to the other portions by welding or the like. ..
　環状網構造部１１，１２は、ともに、アイソトラス構造からなる。ここで、アイソトラス構造について、図４（ｂ）に拡大して示した環状網構造部１１を代表させて説明する。
　図４（ｂ）に示すように、アイソトラス構造は、細い金属線で三角形を形成したトラス構造を立体的に接合することにより構成されている。詳しくは、アイソトラス構造は、軸方向線１１１と、クロス線１１２と、ピラミッドトラス１１３とを有してなる。
　軸方向線１１１は、環形状の軸線Ｘ２が延びる軸方向に延びる金属線である。軸方向線１１１は、環状網構造部１１の周方向に複数本、等間隔で並んで配置されている。軸方向線１１１の本数は任意であるが、ここでは、一例として８本配置されている。 Both of the ring-shaped net structure parts 11 and 12 have an isotrus structure. Here, the iso-truss structure will be described by taking the annular net structure portion 11 enlarged and shown in FIG. 4B as a representative.
As shown in FIG. 4B, the isotrus structure is configured by three-dimensionally joining a truss structure in which a triangle is formed by a thin metal wire. Specifically, the isotrus structure includes an axial line 111, a cross line 112, and a pyramid truss 113.
The axial direction line 111 is a metal line extending in the axial direction along which the ring-shaped axis line X2 extends. A plurality of the axial lines 111 are arranged side by side at equal intervals in the circumferential direction of the annular net structure portion 11. Although the number of the axial lines 111 is arbitrary, eight lines are arranged here as an example.
　クロス線１１２は、Ｘ字状にクロスした金属線からなり、隣接する軸方向線１１１を接続している。クロス線１１２の金属線の各端部は、隣接する軸方向線１１１にそれぞれ接続されている。Ｘ字状のクロス線１１２は、軸方向に所定間隔離間して複数配列している。 The cross wire 112 is made of a metal wire crossed in an X shape, and connects adjacent axial lines 111. Each end of the metal wire of the cross wire 112 is connected to an adjacent axial wire 111. A plurality of X-shaped cross lines 112 are arranged at predetermined intervals in the axial direction.
　ピラミッドトラス１１３は、ピラミッド（四角錘）の頂点に集まる４本の稜線の位置に細い線が配置されたトラス構造である。ピラミッドトラス１１３は、隣接する軸方向線１１１を接続している。また、ピラミッドトラス１１３は、軸方向において、隣接するクロス線１１２の間に配置されている。ピラミッドトラス１１３は、環状網構造部１１，１２の径方向外側に突出するように配置され、各脚が、軸方向線１１１とクロス線１１２の接続点に接続されている。 　Pyramid truss 113 is a truss structure in which thin lines are arranged at the positions of the four ridges that gather at the apex of the pyramid (square pyramid). The pyramid truss 113 connects adjacent axial lines 111. Further, the pyramid truss 113 is arranged between the adjacent cross lines 112 in the axial direction. The pyramid truss 113 is arranged so as to project outward in the radial direction of the ring-shaped net structure portions 11 and 12, and each leg is connected to a connection point between the axial line 111 and the cross line 112.
　このようなアイソトラス構造を採用することで、軽量でありながら、軸方向にも曲げ方向にも高い剛性のロアフレーム１０とすることができる。 By adopting such an isotrus structure, it is possible to obtain a lower frame 10 that is lightweight and has high rigidity in both the axial direction and the bending direction.
　図３に戻り、アッパーフレーム２０は、一対のサイドフレーム１１０の一部を構成する一対の環状網構造部２１と、一対のヘッドレストガイド２２と、屈曲パイプ２３と、接続バー２４と、接続端部２５と、軸支部２６と、トラスバー２７とを有して構成されている。アッパーフレーム２０も、ロアフレーム１０と同様に、全体が金属３次元プリンタにより成形されている。 Returning to FIG. 3, the upper frame 20 includes a pair of annular net structure portions 21 that form a part of the pair of side frames 110, a pair of headrest guides 22, a bending pipe 23, a connecting bar 24, and a connecting end portion. 25, a shaft support portion 26, and a truss bar 27. Like the lower frame 10, the upper frame 20 is entirely formed by a metal three-dimensional printer.
　環状網構造部２１は、ロアフレーム１０の環状網構造部１１，１２と同様のアイソトラス構造からなる。環状網構造部２１は、環形状の軸線Ｘ４が直線状である。 The annular network structure portion 21 has the same isotrus structure as the annular network structure portions 11 and 12 of the lower frame 10. In the ring-shaped net structure portion 21, the ring-shaped axis line X4 is linear.
　ヘッドレストガイド２２は、矩形のパイプからなる。図５の断面図に示すように、ヘッドレストガイド２２は、前面壁２２Ｆに３つの矩形の孔２２Ａが形成され、後面壁２２Ｒの、孔２２Ａとずれた位置に孔２２Ｂおよび切欠き２２Ｃが形成されている。
　図３に戻り、一対のヘッドレストガイド２２は、Ｘ字状の金属線２２Ｘにより接続されている。 The headrest guide 22 is a rectangular pipe. As shown in the cross-sectional view of FIG. 5, in the headrest guide 22, three rectangular holes 22A are formed in the front wall 22F, and holes 22B and notches 22C are formed in the rear wall 22R at positions displaced from the holes 22A. ing.
Returning to FIG. 3, the pair of headrest guides 22 are connected by an X-shaped metal wire 22X.
　屈曲パイプ２３は、一端と他端の軸線が、互いに９０度をなすように屈曲した中空のパイプである。屈曲パイプ２３の一端には、環状網構造部２１が接続されている。屈曲パイプ２３の他端は、左右方向内側を向き、閉じている。 The bent pipe 23 is a hollow pipe bent so that the axis lines at one end and the other end form 90 degrees with each other. The ring-shaped net structure portion 21 is connected to one end of the bent pipe 23. The other end of the bent pipe 23 faces inward in the left-right direction and is closed.
　接続バー２４は、複数の金属線、例えば３本の金属線からなり、各金属線の一端が屈曲パイプ２３の他端（左右内側の端部）に接続され、各金属線の他端がヘッドレストガイド２２に接続されている。 The connection bar 24 is composed of a plurality of metal wires, for example, three metal wires, one end of each metal wire is connected to the other end (end portion on the inside of the left and right) of the bent pipe 23, and the other end of each metal wire is a headrest. It is connected to the guide 22.
　接続端部２５は、網状ではない、一端が閉じたパイプからなり、環状網構造部２１の下端に接続されている。
　軸支部２６は、左右方向に向いた板形状の金属からなり、左右に貫通する軸支穴２６Ａを有している。軸支部２６は、接続端部２５の下方に配置されている。
　トラスバー２７は、細い金属線で三角形を形成したトラス構造を立体的に接合することにより構成された棒である。トラスバー２７は、接続端部２５と軸支部２６を連結している。 The connection end portion 25 is formed of a pipe having a closed end and not a mesh shape, and is connected to the lower end of the ring-shaped net structure portion 21.
The shaft support portion 26 is made of a plate-shaped metal facing in the left-right direction, and has a shaft support hole 26A penetrating in the left-right direction. The shaft support portion 26 is arranged below the connection end portion 25.
The truss bar 27 is a rod configured by three-dimensionally joining truss structures in which a triangle is formed by a thin metal wire. The truss bar 27 connects the connection end portion 25 and the shaft support portion 26.
　アッパーフレーム２０は、サイドフレーム１１０とアッパークロスメンバ１２０により囲まれる基本構造部分の内側に、着座者からの荷重を受ける第１受圧部材７０が設けられている。 The upper frame 20 is provided with a first pressure receiving member 70, which receives a load from a seated person, inside the basic structural portion surrounded by the side frame 110 and the upper cross member 120.
　第１受圧部材７０は、リング部７１と、リング７１部から延び、シートバックフレームＳ２のアッパーフレーム２０に繋がった複数の連結部材７２とを有してなる。リング部７１と各屈曲パイプ２３とは、それぞれ２本の連結部材７２により連結されている。接続端部２５とリング部７１とは、それぞれ１本の連結部材７２により連結されている。軸支部２６とリング部７１とは、それぞれ１本の連結部材７２により連結されている。Ｘ字状の金属線２２Ｘとリング部７１とは、１本の連結部材７２により連結されている。
　連結部材７２は、環状網構造部２１を避けた、網状でない部分に接続されることにより、連結部材７２を、環状網構造部２１と屈曲パイプ２３等により構成された基本構造部分に容易に繋ぐことができる。 The first pressure receiving member 70 includes a ring portion 71 and a plurality of connecting members 72 extending from the ring 71 portion and connected to the upper frame 20 of the seatback frame S2. The ring portion 71 and each bent pipe 23 are connected by two connecting members 72, respectively. The connection end portion 25 and the ring portion 71 are connected by one connecting member 72, respectively. The shaft support portion 26 and the ring portion 71 are connected to each other by one connecting member 72. The X-shaped metal wire 22X and the ring portion 71 are connected by a single connecting member 72.
The connecting member 72 is connected to a non-mesh-shaped portion that avoids the annular net structure portion 21, so that the connecting member 72 is easily connected to the basic structural portion formed by the annular net structure portion 21, the bent pipe 23, and the like. be able to.
　図６に示すように、スライダ８０は、本体部８１と、本体部８１から後に突出した、上下に延びる係合部８２を有している。係合部８２は、左右の各側面８２Ａが山形に突出している。 As shown in FIG. 6, the slider 80 has a main body 81 and a vertically extending engagement portion 82 that projects rearward from the main body 81. The left and right side surfaces 82</b>A of the engaging portion 82 project in a mountain shape.
　固定レール９０は、左右の端部に、上下に延びる一対のレールバー９１を有している。固定レール９０は、第１部材の一例である。一対のレールバー９１は、左右に離間して配置され、互いに対抗する面にＶ字状の溝９２が形成されている。溝９２の形状は、係合部８２の各側面８２Ａの形状に対応し、一対の溝９２の間に係合部８２が係合している。これにより、スライダ８０は、係合部８２がレールバー９１と摺動して、図７（ａ）に示す、固定レール９０の上部に位置する状態と、図７（ｂ）に示す、固定レール９０の下部に位置する状態との間で、固定レール９０に対して上下にスライド移動できるようになっている。なお、スライダ８０は、第２部材の一例である。
　一対のレールバー９１の上端および下端には、スライダ８０の係合部８２が外れるのを防止する壁９３（図６参照）が設けられている。このため、スライダ８０は、固定レール９０に対し離脱不能に係合して固定レール９０に対して相対移動可能である。固定レール９０とスライダ８０とは、互いに離脱不能なので、一体の部品として管理することができ、製造時の部品管理が容易である。 The fixed rail 90 has a pair of vertically extending rail bars 91 at the left and right ends. The fixed rail 90 is an example of a first member. The pair of rail bars 91 are arranged apart from each other on the left and right, and a V-shaped groove 92 is formed on the surfaces facing each other. The shape of the groove 92 corresponds to the shape of each side surface 82A of the engaging portion 82, and the engaging portion 82 is engaged between the pair of grooves 92. As a result, the slider 80 has the engagement portion 82 slid on the rail bar 91 and is positioned above the fixed rail 90 shown in FIG. 7A, and the fixed rail 90 shown in FIG. 7B. It can be slid up and down with respect to the fixed rail 90 between the state of being located at the lower part of the. The slider 80 is an example of the second member.
Walls 93 (see FIG. 6) that prevent the engaging portions 82 of the slider 80 from coming off are provided at the upper and lower ends of the pair of rail bars 91. Therefore, the slider 80 is irremovably engaged with the fixed rail 90 and is movable relative to the fixed rail 90. Since the fixed rail 90 and the slider 80 cannot be separated from each other, they can be managed as an integrated component, and component management during manufacturing is easy.
　アッパーフレーム２０を構成する各部分は、第１受圧部材７０、スライダ８０および固定レール９０を含めて、すべて同じ金属材料により形成されている。そして、全体が、金属３次元プリンタにより一体に成形されている。つまり、スライダ８０と固定レール９０とは、金属３次元プリンタにより同時に成形されている。このため、複雑な形状であっても、容易に製造することができる。また、固定レール９０およびスライダ８０を一度に成形でき、これらを互いに組み立てる工程が不要である。
　特に、少なくとも環状網構造部２１を金属３次元プリンタにより成形することで環状網構造部２１を容易に製造することができる。例えば、環状網構造部２１を、金属３次元プリンタにより成形し、他の部分は、それぞれ別に成形し、環状網構造部２１と他の部分とを溶接等により接合してもよい。 Each part of the upper frame 20, including the first pressure receiving member 70, the slider 80 and the fixed rail 90, is made of the same metal material. And the whole is integrally molded by the metal three-dimensional printer. That is, the slider 80 and the fixed rail 90 are simultaneously molded by the metal three-dimensional printer. Therefore, even a complicated shape can be easily manufactured. Further, the fixed rail 90 and the slider 80 can be molded at one time, and the step of assembling them together is unnecessary.
In particular, the annular net structure portion 21 can be easily manufactured by molding at least the annular net structure portion 21 with a metal three-dimensional printer. For example, the ring net structure portion 21 may be formed by a metal three-dimensional printer, the other portions may be formed separately, and the ring net structure portion 21 and other portions may be joined by welding or the like.
　また、ヘッドレストガイド２２の前面壁２２Ｆと後面壁２２Ｒとに、互い違いに孔２２Ａ，２２Ｂが配置されていることにより、例えば、アッパーフレーム２０を金属３次元プリンタにより後側の部分から前側の部分へ向けて順に積層して成形する場合、孔２２Ｂや切欠き２２Ｃを通す形で前面壁２２Ｆを支持するサポート材２２Ｓを成形して、このサポート材２２Ｓにより前面壁２２Ｆを支えることができる。 Further, since the holes 22A and 22B are alternately arranged on the front wall 22F and the rear wall 22R of the headrest guide 22, for example, the upper frame 20 is moved from the rear portion to the front portion by a metal three-dimensional printer. In the case where the front wall 22F and the cutout 22C are passed through, the support member 22S that supports the front wall 22F can be formed, and the front wall 22F can be supported by the support member 22S.
　図８に示すように、シートクッションフレームＳ１のリアフレーム３０は、一対のサイドフレーム３１と、リアクロスメンバ３２と、フロントクロスメンバ３３と、第２受圧部材３５と、一対の接続バー３７とを備えて構成されている。 As shown in FIG. 8, the rear frame 30 of the seat cushion frame S1 includes a pair of side frames 31, a rear cross member 32, a front cross member 33, a second pressure receiving member 35, and a pair of connection bars 37. It is equipped with.
　一対のサイドフレーム３１は、互いに左右に離間して配置されている。各サイドフレーム３１には、左右内側に突出する固定部３１Ａが設けられている。固定部３１Ａには、上下に貫通する孔３１Ｂが形成されている。固定部３１Ａは、図９（ａ）に示すように、各サイドフレーム３１に、前後に離れて２つずつ配置されている。サイドフレーム３１は、各固定部３１Ａにおいて、孔３１Ｂにボルトを通すなどしてアッパーレール５２に固定されている。 The pair of side frames 31 are arranged so as to be separated from each other on the left and right sides. Each side frame 31 is provided with a fixing portion 31A that projects inward in the left-right direction. The fixing portion 31A is formed with a hole 31B that penetrates vertically. As shown in FIG. 9A, the fixing portions 31A are arranged on each of the side frames 31 such that two of the fixing portions are spaced apart from each other in the front-rear direction. The side frame 31 is fixed to the upper rail 52 by passing a bolt through the hole 31B in each fixing portion 31A.
　図８に戻り、リアクロスメンバ３２は、左右方向に延びるクロスメンバの一例であり、一対のサイドフレーム３１の後端部を連結している。リアクロスメンバ３２は、環状網構造部１１と同様のアイソトラス構造からなる中央部３２Ａと、右側部３２Ｂと、左側部３２Ｃとを有している。中央部３２Ａと右側部３２Ｂとは、上方に延びる網状ではない接続バー３７により接続されている。中央部３２Ａと左側部３２Ｃとは、上方に延びる網状ではない他の接続バー３７により接続されている。 Returning to FIG. 8, the rear cross member 32 is an example of a cross member that extends in the left-right direction, and connects the rear end portions of the pair of side frames 31. The rear cross member 32 has a central portion 32A made of an iso-truss structure similar to the ring net structure portion 11, a right side portion 32B, and a left side portion 32C. The central portion 32A and the right side portion 32B are connected to each other by a connecting bar 37 that extends upward and has a non-mesh shape. The central portion 32A and the left side portion 32C are connected by another connecting bar 37 that extends upward and has a non-mesh shape.
　フロントクロスメンバ３３は、左右方向に延びるクロスメンバの一例であり、一対のサイドフレーム３１の前端部を連結している。フロントクロスメンバ３３は、環状網構造部１１と同様のアイソトラス構造からなる左右に長い本体部３３Ａと、右側部３３Ｂとを有している。本体部３３Ａと右側部３３Ｂとは、網状ではない接続ブロック３３Ｘにより接続されている。 The front cross member 33 is an example of a cross member that extends in the left-right direction, and connects the front end portions of the pair of side frames 31. The front cross member 33 has a main body portion 33A that is long in the left and right direction and has a right side portion 33B that is formed of an isotrus structure similar to the annular net structure portion 11. The main body portion 33A and the right side portion 33B are connected to each other by a connection block 33X which is not mesh-shaped.
　第２受圧部材３５は、着座者からの荷重を受ける部材である。第２受圧部材３５は、前後および左右に並ぶ複数の貫通孔３５Ａを有していることで網状の板形状を有している。第２受圧部材３５は、前後に長く延び、リアクロスメンバ３２とフロントクロスメンバ３３のそれぞれに接続され、リアクロスメンバ３２とフロントクロスメンバ３３に架け渡されている。 The second pressure receiving member 35 is a member that receives a load from a seated person. The second pressure receiving member 35 has a net-like plate shape by having a plurality of through holes 35A arranged side by side in the front and rear and in the left and right. The second pressure receiving member 35 extends in the front-rear direction, is connected to the rear cross member 32 and the front cross member 33, and is bridged between the rear cross member 32 and the front cross member 33.
　図９（ｂ）に示すように、第２受圧部材３５は、本体部３５Ｂと、フロント補強接続部３５Ｄと、リア補強接続部３５Ｆとを有して構成されている。本体部３５Ｂは、第２受圧部材３５の上面を構成し、フロントクロスメンバ３３の乗員側に接続されるとともに、リアクロスメンバ３２の乗員側に接続されている。フロント補強接続部３５Ｄは、本体部３５Ｂの前部から、乗員とは反対側に枝分かれして延び、フロントクロスメンバ３３に接続している。リア補強接続部３５Ｆは、本体部３５Ｂの後部から、乗員とは反対側に枝分かれして延び、リアクロスメンバ３２に接続している。フロント補強接続部３５Ｄおよびリア補強接続部３５Ｆは、補強接続部の一例である。 As shown in FIG. 9B, the second pressure receiving member 35 has a main body portion 35B, a front reinforcing connection portion 35D, and a rear reinforcing connection portion 35F. The main body portion 35B constitutes the upper surface of the second pressure receiving member 35, is connected to the passenger side of the front cross member 33, and is connected to the passenger side of the rear cross member 32. The front reinforcing connecting portion 35D extends from the front portion of the main body portion 35B in a branching manner on the side opposite to the occupant, and is connected to the front cross member 33. The rear reinforcing connection portion 35F extends from the rear portion of the main body portion 35B in a branching manner on the side opposite to the occupant, and is connected to the rear cross member 32. The front reinforcing connection part 35D and the rear reinforcing connection part 35F are examples of the reinforcing connection part.
　図８に戻り、接続バー３７は、上端部に、左右に貫通する軸支穴３７Ａを有している。一対の接続バー３７は、２つのＸ字状の金属線３７Ｘにより互いに接続されている。 Returning to FIG. 8, the connection bar 37 has a shaft support hole 37A penetrating left and right at the upper end portion. The pair of connection bars 37 are connected to each other by two X-shaped metal wires 37X.
　接続バー３７の軸支穴３７Ａと、ロアフレーム１０の接続バー１７の軸支穴１７Ａには、図示しない軸が通されており、これにより、シートクッションフレームＳ１のリアフレーム３０に対してシートバックフレームＳ２のロアフレーム１０が回動可能となっている。 A shaft (not shown) is passed through the shaft support hole 37A of the connection bar 37 and the shaft support hole 17A of the connection bar 17 of the lower frame 10, whereby a seat back is provided with respect to the rear frame 30 of the seat cushion frame S1. The lower frame 10 of the frame S2 is rotatable.
　リアフレーム３０は、サイドフレーム３１、リアクロスメンバ３２、フロントクロスメンバ３３、第２受圧部材３５および接続バー３７が、すべて、金属３次元プリンタにより同じ金属材料により一体に成形されている。 In the rear frame 30, the side frame 31, the rear cross member 32, the front cross member 33, the second pressure receiving member 35, and the connection bar 37 are all integrally formed of the same metal material by a metal three-dimensional printer.
　シートクッションフレームＳ１のフロントフレーム４０は、一対のサイドフレーム４１と、リアクロスメンバ４２と、フロントクロスメンバ４３と、第２受圧部材４５とを備えて構成されている。 The front frame 40 of the seat cushion frame S1 includes a pair of side frames 41, a rear cross member 42, a front cross member 43, and a second pressure receiving member 45.
　一対のサイドフレーム４１は、互いに左右に離間して配置されている。各サイドフレーム４１には、左右内側に突出する固定部４１Ａが設けられている。固定部４１Ａには、上下に貫通する孔４１Ｂが形成されている。固定部４１Ａは、図９（ａ）に示すように、各サイドフレーム４１に、前後に離れて２つずつ配置されている。サイドフレーム４１は、各固定部４１Ａにおいて、孔４１Ｂにボルトを通すなどしてアッパーレール５２に固定されている。 The pair of side frames 41 are arranged so as to be separated from each other on the left and right. Each side frame 41 is provided with a fixing portion 41A that projects inward in the left-right direction. The fixing portion 41A is formed with a hole 41B that penetrates vertically. As shown in FIG. 9A, two fixing portions 41A are arranged on each side frame 41 so as to be separated from each other in the front-rear direction. The side frame 41 is fixed to the upper rail 52 by passing a bolt through the hole 41B in each fixing portion 41A.
　図８に戻り、リアクロスメンバ４２は、左右方向に延びるクロスメンバの一例であり、一対のサイドフレーム４１の後端部を連結している。リアクロスメンバ４２は、環状網構造部１１と同様のアイソトラス構造の環状網構造部からなる本体部４２Ａと、右上がりに傾斜した傾斜部４２Ｂと、右側部４２Ｃとを有している。本体部４２Ａ、傾斜部４２Ｂ，右側部４２Ｃは、環形状の軸線が直線状である。本体部４２Ａと傾斜部４２Ｂとは、網状ではない接続部の一例としての接続パイプ４２Ｘにより接続されている。傾斜部４２Ｂと右側部４２Ｃとは、網状ではない接続部の一例としての接続パイプ４２Ｙにより接続されている。これにより、リアクロスメンバ４２は、環状網構造部と網状ではない接続パイプ４２Ｘ，４２Ｙがこれらの長手方向に沿って交互に配置されている。リアクロスメンバ４２の各環状網構造部と接続パイプ４２Ｘ，４２Ｙとは、一体に成形されている。 Returning to FIG. 8, the rear cross member 42 is an example of a cross member that extends in the left-right direction, and connects the rear end portions of the pair of side frames 41. The rear cross member 42 has a main body portion 42A made of an annular net structure portion having the same iso-truss structure as the annular net structure portion 11, an inclined portion 42B inclined upward to the right, and a right side portion 42C. The main body 42A, the inclined portion 42B, and the right side portion 42C have a ring-shaped axis line that is linear. The main body portion 42A and the inclined portion 42B are connected by a connection pipe 42X which is an example of a non-netlike connection portion. The inclined portion 42B and the right side portion 42C are connected by a connection pipe 42Y that is an example of a non-mesh connection portion. As a result, in the rear cross member 42, the ring-shaped net structure portion and the non-netted connection pipes 42X and 42Y are alternately arranged along the longitudinal direction thereof. Each annular net structure portion of the rear cross member 42 and the connection pipes 42X and 42Y are integrally molded.
　フロントクロスメンバ４３は、左右方向に延びるクロスメンバの一例であり、一対のサイドフレーム４１の前端部を連結している。フロントクロスメンバ４３は、環状網構造部１１と同様のアイソトラス構造の環状網構造部からなる本体部４３Ａと、右上がりに傾斜した傾斜部４３Ｂと、右側部４３Ｃとを有している。本体部４３Ａ、傾斜部４３Ｂ，右側部４３Ｃは、環形状の軸線が直線状である。本体部４３Ａと傾斜部４３Ｂとは、網状ではない接続部の一例としての接続パイプ４３Ｘにより接続されている。傾斜部４３Ｂと右側部４３Ｃとは、網状ではない接続部の一例としての接続パイプ４３Ｙにより接続されている。これにより、フロントクロスメンバ４３は、環状網構造部と網状ではない接続パイプ４３Ｘ，４３Ｙがこれらの長手方向に沿って交互に配置されている。フロントクロスメンバ４３の各環状網構造部と接続パイプ４３Ｘ，４３Ｙとは、一体に成形されている。 The front cross member 43 is an example of a cross member that extends in the left-right direction, and connects the front end portions of the pair of side frames 41. The front cross member 43 has a main body portion 43A made of an annular net structure portion having an iso-truss structure similar to the annular net structure portion 11, an inclined portion 43B inclined upward to the right, and a right side portion 43C. The main body 43A, the inclined portion 43B, and the right side portion 43C each have a linear ring-shaped axis. The main body portion 43A and the inclined portion 43B are connected by a connection pipe 43X which is an example of a non-netlike connection portion. The inclined portion 43B and the right side portion 43C are connected by a connection pipe 43Y as an example of a non-mesh-shaped connection portion. As a result, in the front cross member 43, the ring-shaped net structure portion and the non-netted connection pipes 43X and 43Y are alternately arranged along the longitudinal direction thereof. Each annular net structure portion of the front cross member 43 and the connection pipes 43X and 43Y are integrally formed.
　第２受圧部材４５は、着座者からの荷重を受ける部材である。第２受圧部材４５は、三角形または四角形の複数の貫通孔４５Ａを有していることで網状の板形状を有している。第２受圧部材４５は、左右に長く延び、リアクロスメンバ４２とフロントクロスメンバ４３のそれぞれに接続され、リアクロスメンバ４２とフロントクロスメンバ４３に架け渡されている。 The second pressure receiving member 45 is a member that receives a load from a seated person. The second pressure receiving member 45 has a net-like plate shape by having a plurality of triangular or quadrangular through holes 45A. The second pressure receiving member 45 extends to the left and right, is connected to the rear cross member 42 and the front cross member 43, and is bridged between the rear cross member 42 and the front cross member 43.
　フロントフレーム４０は、サイドフレーム４１、リアクロスメンバ４２、フロントクロスメンバ４３および第２受圧部材４５が、すべて、金属３次元プリンタにより同じ金属材料により一体に成形されている。 In the front frame 40, the side frame 41, the rear cross member 42, the front cross member 43, and the second pressure receiving member 45 are all integrally formed of the same metal material by a metal three-dimensional printer.
　以上のような構成のシートフレームＳによれば、次のような効果を奏することができる。
　環形状からなる環状網構造部（環状網構造部１１，１２，２１、リアクロスメンバ３２，４２、フロントクロスメンバ３３，４３）を一部に有することにより、軽量でありながら高剛性にすることができる。特に、環状網構造部にアイソトラス構造を採用することで、シートフレームＳを軽量でありながら高剛性にすることができる。 According to the seat frame S having the above configuration, the following effects can be obtained.
By having a ring-shaped ring-shaped net structure part (ring-shaped net structure parts 11, 12, 21, rear cross members 32, 42, front cross members 33, 43) in a part, it is lightweight and has high rigidity. You can Particularly, by adopting the isotrus structure for the annular net structure portion, the seat frame S can be made lightweight while having high rigidity.
　環状網構造部１１，１２を、環形状の軸線が直線状、つまり、直線状のパイプ形状とすることで、環状網構造部１１，１２の設計を容易にすることができる。そして、網状ではない屈曲パイプ１３によって複数の環状網構造部１１，１２を接続することで、網を構成する線状部分を容易に屈曲パイプ１３に接続することができるので、環状網構造部１１，１２同士を容易に接続することができる。 By designing the ring-shaped net structure parts 11 and 12 into a pipe shape in which the ring-shaped axis is linear, that is, a straight pipe shape, the design of the ring-shaped net structure parts 11 and 12 can be facilitated. By connecting the plurality of annular net structure portions 11 and 12 with the bent pipe 13 that is not mesh-like, it is possible to easily connect the linear portions that form the net to the bent pipe 13, and thus the annular net structure portion 11 , 12 can be easily connected to each other.
　そして、接続部を曲がった屈曲パイプ１３とすることで、環状網構造部１１，１２は直線状のパイプ形状とし、屈曲パイプ１３の部分で曲がった形状を作ることができるため、シートフレームＳの設計と製造を容易にすることができる。 Further, since the connecting portion is the bent pipe 13, the annular net structure portions 11 and 12 have a linear pipe shape, and the bent portion of the bent pipe 13 can be formed. It can be easily designed and manufactured.
　さらに、環状網構造部１１，１２を避けて、連結部材６２を屈曲パイプ１３や接続端部１４に接続することで、容易に連結部材６２をシートバックフレームＳ２の基本構造部分に繋ぐことができる。 Further, by avoiding the ring-shaped net structure portions 11 and 12 and connecting the connecting member 62 to the bent pipe 13 and the connecting end portion 14, the connecting member 62 can be easily connected to the basic structural portion of the seatback frame S2. ..
　また、環状網構造部１１，１２を屈曲パイプ１３と一体に成形することで、環状網構造部１１，１２と屈曲パイプ１３を有してなる基本構造部分を一体的な高剛性の部材とすることができる。同様に、リアクロスメンバ３２の各部（中央部３２Ａ、右側部３２Ｂ、左側部３２Ｃ）および接続バー３７を一体に成形し、フロントクロスメンバ３３の各部（本体部３３Ａ、右側部３３Ｂ、接続ブロック３３Ｘ）を一体に成形することで、リアフレーム３０を一体的な高剛性の部材とすることができる。フロントフレーム４０についても同様、環状網構造部と接続部を一体に成形することで、一体的な高剛性の部材とすることができる。 In addition, the annular net structure portions 11 and 12 are integrally formed with the bent pipe 13, so that the basic structural portion including the annular net structure portions 11 and 12 and the bent pipe 13 is made into an integrally high-rigidity member. be able to. Similarly, each part of the rear cross member 32 (center part 32A, right part 32B, left part 32C) and the connection bar 37 are integrally molded, and each part of the front cross member 33 (main part 33A, right part 33B, connection block 33X). ) Is integrally molded, the rear frame 30 can be made as an integrated member having high rigidity. Similarly, with respect to the front frame 40, by integrally molding the annular net structure portion and the connection portion, it is possible to form an integrated member having high rigidity.
　また、屈曲パイプ１３、接続パイプ４２Ｘ，４２Ｙ，４３Ｘ，４３Ｙが中空のパイプ形状であることで接続部を軽量で高剛性としながら、環状網構造部同士を容易に接続することができる。 Further, since the bent pipe 13 and the connection pipes 42X, 42Y, 43X, 43Y are hollow pipe shapes, the ring net structure parts can be easily connected to each other while the connection part is lightweight and highly rigid.
　また、第２受圧部材３５，４５が網状の板形状であることで、シートクッションフレームＳ１を軽量な構造で補強し、高剛性にすることができる。 Further, since the second pressure receiving members 35 and 45 are in the shape of a net-like plate, the seat cushion frame S1 can be reinforced with a lightweight structure to have high rigidity.
　また、第２受圧部材３５が、リアクロスメンバ３２の乗員側に接続されるとともに、リアクロスメンバ３２の乗員とは反対側に向けて枝分かれして延び、リアクロスメンバ３２に接続するリア補強接続部３５Ｆを有することで、第２受圧部材３５とリアクロスメンバ３２の接続を強固にすることができる。
　同様に、第２受圧部材３５が、フロントクロスメンバ３３の乗員側に接続されるとともに、フロントクロスメンバ３３の乗員とは反対側に向けて枝分かれして延び、フロントクロスメンバ３３に接続するフロント補強接続部３５Ｄを有することで、第２受圧部材３５とフロントクロスメンバ３３の接続を強固にすることができる。
　すなわち、第２受圧部材３５は、一部が上下に分かれた２層構造となっており、これにより、高い剛性を有している。 Also, the second pressure receiving member 35 is connected to the occupant side of the rear cross member 32, and also branches and extends toward the side of the rear cross member 32 opposite to the occupant and is connected to the rear cross member 32. By including the portion 35F, the connection between the second pressure receiving member 35 and the rear cross member 32 can be strengthened.
Similarly, the second pressure receiving member 35 is connected to the occupant side of the front cross member 33, and branches and extends toward the side of the front cross member 33 opposite to the occupant to connect to the front cross member 33. By having the connecting portion 35D, the connection between the second pressure receiving member 35 and the front cross member 33 can be strengthened.
That is, the second pressure receiving member 35 has a two-layer structure in which a part is divided into an upper part and a lower part, and thus has high rigidity.
　以上に一実施形態について説明したが、前記実施形態は適宜変形して実施することができる。 Although one embodiment has been described above, the above embodiment can be appropriately modified and implemented.
　例えば、前記実施形態において、シートバックフレームＳ２のロアフレーム１０、アッパーフレーム２０、シートクッションフレームＳ１のリアフレーム３０、フロントフレーム４０は、それぞれ、同一材料により一体に成形されていたが、一部を異なる材料から構成してもよい。例えば、金属３次元プリンタにより一体に成形する場合においても、環状網構造部と接続部とは異なる材料からなっていてもよい。これにより、部分ごとに適切な材料を選択することができる。例えば、環状網構造部をアルミニウム合金とし、接続部を鋼材とすることで、剛性を確保しつつ、さらに軽量化することができる。 For example, in the above-described embodiment, the lower frame 10, the upper frame 20, and the rear frame 30 and the front frame 40 of the seat back frame S2, which are formed of the same material, respectively, are integrally formed. It may be composed of different materials. For example, even in the case of integrally molding with a metal three-dimensional printer, the annular net structure portion and the connection portion may be made of different materials. Thereby, an appropriate material can be selected for each part. For example, the annular net structure portion is made of aluminum alloy and the connection portion is made of steel material, whereby the rigidity can be secured and the weight can be further reduced.
　また、シートフレームＳは、少なくとも環状網構造部が成形後に熱処理されていてもよい。環状網構造部に熱処理をすることにより、例えば、組織を微細化して環状網構造部をより高剛性にすることができる。 Further, in the seat frame S, at least the ring-shaped net structure portion may be heat-treated after molding. By heat-treating the annular net structure portion, for example, the structure can be made finer and the annular net structure portion can be made more rigid.
　前記実施形態においては、リング部を有する第１受圧部材をシートバックフレームに設けていたが、シートクッションフレームに設けてもよい。また、網状の板形状の第２受圧部材をシートクッションフレームに設けていたが、シートバックフレームに設けてもよい。 In the above embodiment, the first pressure receiving member having the ring portion is provided on the seat back frame, but it may be provided on the seat cushion frame. Further, although the net pressure plate-shaped second pressure receiving member is provided in the seat cushion frame, it may be provided in the seat back frame.
　また、前記実施形態においては、連結部材６２，７２を、シートバックフレームＳ２の基本構造部分に一体に成形することで連結していたが、組立により連結してもよい。図１０から図１３は、この連結方法の変形例を説明する図である。なお、この連結方法自体は、環状網構造部を有さないシートフレームにも適用可能であるので、図においては、環状網構造部を有さないシートフレームを示している。 Further, in the above-described embodiment, the connecting members 62 and 72 are connected by being integrally formed with the basic structural portion of the seatback frame S2, but they may be connected by assembling. 10 to 13 are diagrams for explaining modified examples of the connecting method. Since this connecting method itself can be applied to a seat frame having no annular net structure portion, the seat frame having no annular net structure portion is shown in the drawing.
　図１０に示すように、受圧部材の固定構造の第１変形例では、シートバックフレームＳＢに連結部材７２を連結するために、連結部材７２の先端にヒンジ式の組付部材２６０を用いることができる。なお、シートバックフレームＳＢのパイプフレーム２００は、左右のサイドフレーム２２０と、サイドフレーム２２０の上端同士を繋ぐアッパークロスメンバ２１０とを有してＵ字形状を有している。パイプフレーム２００は、網状ではなく、一本のパイプをＵ字形に屈曲してなる。サイドフレーム２２０の下端には、接続端部部材２５０が接続されている。接続端部部材２５０は、一方のサイドフレーム２２０の端部を切断して示したように、パイプフレーム２００の内径に対応した円形の突起２５１を有しており、突起２５１をサイドフレーム２２０の下端に圧入することでパイプフレーム２００に組付けられている。 As shown in FIG. 10, in the first modification of the pressure receiving member fixing structure, a hinge-type assembling member 260 is used at the tip of the connecting member 72 in order to connect the connecting member 72 to the seat back frame SB. it can. The pipe frame 200 of the seat back frame SB has a U-shape having left and right side frames 220 and an upper cross member 210 that connects upper ends of the side frames 220. The pipe frame 200 does not have a mesh shape, but is formed by bending a single pipe into a U-shape. The connection end member 250 is connected to the lower end of the side frame 220. The connection end member 250 has a circular protrusion 251 corresponding to the inner diameter of the pipe frame 200, as shown by cutting the end of one side frame 220, and the protrusion 251 is attached to the lower end of the side frame 220. It is assembled to the pipe frame 200 by being pressed into.
　図１１（ａ）に示すように、組付部材２６０は、固定部２６１と可動部２６２とを有してなる。
　固定部２６１は、パイプフレーム２００（アッパークロスメンバ２１０）の外形に対応した半円形の溝２６１Ｇを有する本体部２６１Ａと、本体部２６１Ａの、溝２６１Ｇの一方側に設けられたヒンジ受け部２６１Ｂと、溝２６１Ｇの他方側に設けられたロック部２６１Ｄとを有している。ヒンジ受け部２６１Ｂは、穴２６１Ｃを有している。ロック部２６１Ｄは、半円柱形状の軸部２６１Ｅと、軸部２６１Ｅの先端に設けられた、軸部２６１Ｅよりも拡径した半楕円形状の係合部２６１Ｆを有している。 As shown in FIG. 11A, the assembly member 260 has a fixed portion 261 and a movable portion 262.
The fixing portion 261 includes a main body portion 261A having a semicircular groove 261G corresponding to the outer shape of the pipe frame 200 (upper cross member 210), and a hinge receiving portion 261B provided on one side of the groove 261G of the main body portion 261A. , And a lock portion 261D provided on the other side of the groove 261G. The hinge receiving portion 261B has a hole 261C. The lock portion 261D includes a semi-cylindrical shaft portion 261E and a semi-elliptical engagement portion 261F provided at the tip of the shaft portion 261E and having a diameter larger than that of the shaft portion 261E.
　可動部２６２は、パイプフレーム２００（アッパークロスメンバ２１０）の外形に対応した半円形の溝２６２Ｇを有する本体部２６２Ａと、本体部２６２Ａの、溝２６２Ｇの一方側に設けられたヒンジ部２６２Ｂと、溝２６２Ｇの他方側に設けられたロック部２６２Ｄとを有している。ヒンジ部２６２Ｂは、穴２６１Ｃに対応した円柱形状の軸部２６２Ｃを有している。ロック部２６２Ｄは、半円柱形状の軸部２６２Ｅと、軸部２６２Ｅの先端に設けられた、軸部２６２Ｅよりも拡径した半楕円形状の係合部２６２Ｆを有している。 The movable portion 262 has a main body portion 262A having a semicircular groove 262G corresponding to the outer shape of the pipe frame 200 (upper cross member 210), a hinge portion 262B provided on one side of the groove 262G of the main body portion 262A, It has a lock portion 262D provided on the other side of the groove 262G. The hinge portion 262B has a columnar shaft portion 262C corresponding to the hole 261C. The lock part 262D has a semi-cylindrical shaft part 262E and a semi-elliptical engagement part 262F provided at the tip of the shaft part 262E and having a diameter larger than that of the shaft part 262E.
　組付部材２６０をパイプフレーム２００（アッパークロスメンバ２１０）に組み付ける場合、まず、図１１（ａ）のように、固定部２６１の溝２６１Ｇにパイプフレーム２００の外周に合わせる。そして、図１１（ｂ）のように、軸部２６２Ｃを穴２６１Ｃに挿入する。さらに、図１１（ｃ）のように、可動部２６２を回動させて溝２６２Ｇをパイプフレーム２００に合わせる。 When the assembling member 260 is assembled to the pipe frame 200 (upper cross member 210), first, as shown in FIG. 11A, the groove 261G of the fixing portion 261 is aligned with the outer periphery of the pipe frame 200. Then, as shown in FIG. 11B, the shaft portion 262C is inserted into the hole 261C. Further, as shown in FIG. 11C, the movable portion 262 is rotated to align the groove 262G with the pipe frame 200.
　すると、図１１（ｄ）のように、軸部２６１Ｅと軸部２６２Ｅが合わさって円柱形状となり、係合部２６１Ｆと係合部２６２Ｆが合わさって楕円形状となる。この合わさって楕円形状となった係合部２６１Ｆ，２６２Ｆを、図１１（ｅ）のように、ロック板２６３に形成された楕円形状の貫通孔２６３Ａに通す。そして、ロック板２６３を９０度回転させることで、図１１（ｆ）のように楕円形状の貫通孔２６３Ａの長軸と係合部２６１Ｆ，２６２Ｆの長軸が直交してロック板２６３が外れなくなり、可動部２６２も固定部２６１から動かなくなる。このようにして、組付部材２６０をパイプフレーム２００に組み付けることができる。 Then, as shown in FIG. 11D, the shaft portion 261E and the shaft portion 262E are combined to form a columnar shape, and the engagement portion 261F and the engagement portion 262F are combined to form an elliptical shape. As shown in FIG. 11E, the engaging portions 261F and 262F, which are formed into an elliptical shape by being combined with each other, are passed through the elliptical through hole 263A formed in the lock plate 263. Then, by rotating the lock plate 263 by 90 degrees, the long axis of the elliptical through hole 263A and the long axes of the engaging portions 261F and 262F are orthogonal to each other as shown in FIG. The movable part 262 is also fixed from the fixed part 261. In this way, the assembly member 260 can be assembled to the pipe frame 200.
　図１２（ａ）に示すように、受圧部材の固定構造の第２変形例では、シートバックフレームＳＢに連結部材７２を連結するために、連結部材７２の先端にＣ字形の組付部材３６０を用いることができる。 As shown in FIG. 12A, in the second modification of the pressure receiving member fixing structure, in order to connect the connecting member 72 to the seat back frame SB, a C-shaped assembling member 360 is provided at the tip of the connecting member 72. Can be used.
　図１２（ｂ）に示すように、組付部材３６０は、一定のＣ字断面の形状を有し、スリット３６５を有している。組付部材３６０のスリット３６５側の各先端は、外側に行くにつれ互いに広がるテーパー面３６１を有している。組付部材３６０は、可撓性を有する材料から構成され、スリット３６５がパイプフレーム２００の直径程度に弾性的に広がることができるようになっている。
　このため、テーパー面３６１をパイプフレーム２００に押し付けることで、組付部材３６０が弾性的に広がって、組付部材３６０をパイプフレーム２００の外周に合わせることができるようになっている。 As shown in FIG. 12B, the assembling member 360 has a constant C-shaped cross section and has a slit 365. Each tip on the slit 365 side of the assembling member 360 has a tapered surface 361 that expands toward the outside. The assembling member 360 is made of a flexible material, and the slit 365 can elastically expand to the diameter of the pipe frame 200.
Therefore, by pressing the tapered surface 361 against the pipe frame 200, the assembling member 360 elastically spreads and the assembling member 360 can be fitted to the outer periphery of the pipe frame 200.
　第２変形例の組付部材は、図１２（ｃ）に示す組付部材３６０Ｂのように、２つのＣ字形状の本体部３６２Ｂを連結部３６３Ｃにより連結して、二連構造にすることもできる。このようにすれば、よりしっかりと組付部材３６０Ｂをパイプフレーム２００に組み付けることができる。 The assembly member of the second modified example may have a double structure in which two C-shaped main body portions 362B are connected by a connection portion 363C as in an assembly member 360B shown in FIG. 12(c). it can. By doing so, the assembling member 360B can be more firmly assembled to the pipe frame 200.
　図１３（ａ）に示すように、受圧部材の固定構造の第３変形例では、シートバックフレームＳＢに連結部材７２を連結するために、連結部材７２の先端にカシメ式の組付部材４６０を用いることができる。 As shown in FIG. 13A, in the third modified example of the pressure receiving member fixing structure, in order to connect the connecting member 72 to the seat back frame SB, a caulking type assembling member 460 is provided at the tip of the connecting member 72. Can be used.
　図１３（ｂ）に示すように、組付部材４６０は、組付前において、半円形の溝４６１Ｇを有する本体部４６１と、本体部４６１から延びる２つの変形壁４６２を有して構成されている。２つの変形壁４６２は、互いに平行である。また、変形壁４６２の先端には、突起４６２Ａと、溝４６２Ｂが形成されている。一方の変形壁４６２の突起４６２Ａは、溝４６１Ｇの軸方向において、他方の変形壁４６２の溝４６２Ｂと対応した位置に位置している。 As shown in FIG. 13B, the assembling member 460 is configured to have a main body portion 461 having a semicircular groove 461G and two deformation walls 462 extending from the main body portion 461 before the assembling. There is. The two deformation walls 462 are parallel to each other. Further, a projection 462A and a groove 462B are formed at the tip of the deformation wall 462. The protrusion 462A of the one deformation wall 462 is located at a position corresponding to the groove 462B of the other deformation wall 462 in the axial direction of the groove 461G.
　このような組付部材４６０をパイプフレーム２００に組み付ける場合、まず、半円形の溝４６１Ｇにパイプフレーム２００の外周を合わせる。そして、半円形状の溝４６５Ｇを有するカシメ冶具４６５を用意し、溝４６５Ｇを２つの変形壁４６２に対し、変形壁４６２の先端側から押し付ける。すると、図１３（ｃ）に示すように、変形壁４６２が半円筒形に変形し、パイプフレーム２００に抱き付いて固定される。この時、変形壁４６２の先端の突起４６２Ａと溝４６２Ｂが係合して、組付部材４６０が強固にパイプフレーム２００に固定される。 When assembling such an assembly member 460 to the pipe frame 200, first, the outer periphery of the pipe frame 200 is aligned with the semicircular groove 461G. Then, a caulking jig 465 having a semicircular groove 465G is prepared, and the groove 465G is pressed against the two deformation walls 462 from the tip side of the deformation wall 462. Then, as shown in FIG. 13C, the deformation wall 462 is deformed into a semi-cylindrical shape, and the deformation wall 462 is held and fixed to the pipe frame 200. At this time, the protrusion 462A at the tip of the deformation wall 462 and the groove 462B are engaged with each other, so that the assembly member 460 is firmly fixed to the pipe frame 200.
　前記実施形態においては、環状網構造部を有するシートフレームが後部座席の車両用シートに適用される場合について説明したが、同様のシートフレームを、車両の前部座席に適用してもよいし、車両以外の乗物用シートに適用してもよい。また、乗物以外のシート、例えば、一般家庭や福祉施設に設置されるシートであってもよい。 In the above embodiment, the case where the seat frame having the ring-shaped net structure part is applied to the vehicle seat of the rear seat has been described, but a similar seat frame may be applied to the front seat of the vehicle, It may be applied to vehicle seats other than vehicles. Further, it may be a seat other than a vehicle, for example, a seat installed in a general home or a welfare facility.
　また、本明細書に記載した各実施形態および各変形例で説明した各要素は、適宜組み合わせて実施することが可能である。 Also, each element described in each embodiment and each modification described in this specification can be implemented in an appropriate combination.

Claims (18)

  1. 　シートクッションフレームと、シートバックフレームとを有するシートフレームであって、
    　前記シートクッションフレームおよび前記シートバックフレームの少なくとも一部に、網状の環形状を有する環状網構造部を有することを特徴とするシートフレーム。     A seat frame having a seat cushion frame and a seat back frame,
    A seat frame, wherein at least a part of the seat cushion frame and the seat back frame has an annular net structure having a net-like annular shape.
  2. 　前記環状網構造部は、アイソトラス構造からなることを特徴とする請求項１に記載のシートフレーム。 The seat frame according to claim 1, wherein the ring-shaped net structure portion has an isotrus structure.
  3. 　前記環状網構造部は、複数設けられ、それぞれ、前記環形状の軸線が直線状であり、
    　複数の前記環状網構造部を接続する、網状ではない接続部をさらに備えることを特徴とする請求項１または請求項２に記載のシートフレーム。     The annular net structure portion is provided in plurality, each of the annular axis is linear,
    The seat frame according to claim 1 or 2, further comprising a non-net-like connecting portion that connects a plurality of the annular net structure portions.
  4. 　前記接続部は、複数の前記環状網構造部を互いに異なる向きで接続することを特徴とする請求項３に記載のシートフレーム。 The seat frame according to claim 3, wherein the connecting portion connects the plurality of annular network structure portions in different directions.
  5. 　前記環状網構造部および前記接続部とは別の、他の部材または他の部分が、前記接続部に繋がり、前記環状網構造部には繋がっていないことを特徴とする請求項３または請求項４に記載のシートフレーム。 4. Another member or another part other than the annular net structure portion and the connection portion is connected to the connection portion and is not connected to the annular net structure portion. The seat frame described in 4.
  6. 　前記環状網構造部と前記接続部とは一体に成形されていることを特徴とする請求項３から請求項５のいずれか１項に記載のシートフレーム。 The seat frame according to any one of claims 3 to 5, wherein the annular net structure portion and the connection portion are integrally molded.
  7. 　前記環状網構造部と前記接続部とは異なる材料からなることを特徴とする請求項６に記載のシートフレーム。 The seat frame according to claim 6, wherein the annular net structure portion and the connection portion are made of different materials.
  8. 　前記接続部は、中空のパイプ形状を有することを特徴とする請求項３から請求項７のいずれか１項に記載のシートフレーム。 The seat frame according to any one of claims 3 to 7, wherein the connecting portion has a hollow pipe shape.
  9. 　前記環状網構造部と前記接続部は、交互に配置されていることを特徴とする請求項３から請求項８のいずれか１項に記載のシートフレーム。 The seat frame according to any one of claims 3 to 8, wherein the annular net structure portion and the connection portion are arranged alternately.
  10. 　前記シートクッションフレームまたは前記シートバックフレームに設けられた着座者からの荷重を受ける第１受圧部材をさらに備え、
    　前記第１受圧部材は、
    　リング部と、
    　前記リング部から延び、前記シートバックフレームまたは前記シートクッションフレームに繋がった複数の連結部材とを有することを特徴とする請求項３から請求項９のいずれか１項に記載のシートフレーム。     Further comprising a first pressure receiving member provided on the seat cushion frame or the seat back frame and receiving a load from a seated person,
    The first pressure receiving member,
    The ring part,
    The seat frame according to any one of claims 3 to 9, further comprising a plurality of connecting members extending from the ring portion and connected to the seat back frame or the seat cushion frame.
  11. 　前記連結部材は、前記接続部に繋がっていることを特徴とする請求項１０に記載のシートフレーム。 The seat frame according to claim 10, wherein the connecting member is connected to the connecting portion.
  12. 　前記シートクッションフレームまたは前記シートバックフレームに設けられた着座者からの荷重を受ける第２受圧部材をさらに備え、
    　前記第２受圧部材は、網状の板形状を有することを特徴とする請求項１から請求項１１のいずれか１項に記載のシートフレーム。     Further comprising a second pressure receiving member provided on the seat cushion frame or the seat back frame for receiving a load from a seated person,
    The seat frame according to any one of claims 1 to 11, wherein the second pressure receiving member has a mesh plate shape.
  13. 　前記シートクッションフレームまたは前記シートバックフレームは、左右方向に延びるクロスメンバを有し、
    　前記第２受圧部材は、前記クロスメンバに接続される本体部と、前記本体部から乗員とは反対側に向けて枝分かれして延び、前記クロスメンバに接続する補強接続部を有することを特徴とする請求項１２に記載のシートフレーム。     The seat cushion frame or the seat back frame has a cross member extending in the left-right direction,
    The second pressure receiving member includes a main body portion connected to the cross member, and a reinforcing connection portion that branches from the main body portion toward the side opposite to the occupant and extends to connect to the cross member. The seat frame according to claim 12.
  14. 　少なくとも前記環状網構造部が成形後に熱処理されていることを特徴とする請求項１から請求項１３のいずれか１項に記載のシートフレーム。 The seat frame according to any one of claims 1 to 13, wherein at least the annular net structure portion is heat treated after molding.
  15. 　第１部材と、前記第１部材に対し離脱不能に係合して前記第１部材に対して相対移動可能な第２部材と、をさらに備えることを特徴とする請求項１から請求項１４のいずれか１項に記載のシートフレーム。 The first member, and a second member that is engaged with the first member in a non-separable manner and is movable relative to the first member, further comprising: The seat frame according to any one of items.
  16. 　請求項１から請求項１５のいずれか１項に記載のシートフレームの製造方法であって、
    　少なくとも前記環状網構造部を金属３次元プリンタにより成形することを特徴とするシートフレームの製造方法。     A method of manufacturing a seat frame according to any one of claims 1 to 15,
    A method for manufacturing a seat frame, characterized in that at least the annular net structure portion is molded by a metal three-dimensional printer.
  17. 　請求項１５に記載のシートフレームの製造方法であって、前記第１部材および前記第２部材を、金属３次元プリンタにより同時に成形することを特徴とする製造方法。 The method for manufacturing a seat frame according to claim 15, wherein the first member and the second member are simultaneously molded by a metal three-dimensional printer.
  18. 　請求項１から請求項１５のいずれか１項に記載のシートフレームと、
    　前記シートフレームに被せられたパッドと、
    　前記パッドを覆う表皮部材とを備えることを特徴とするシート。     A seat frame according to any one of claims 1 to 15,
    A pad put on the seat frame,
    A seat comprising a skin member covering the pad.
PCT/JP2019/049512 2019-01-17 2019-12-18 Seat frame and method for manufacturing same, and seat WO2020149077A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004520539A (en) * 2000-07-28 2004-07-08 ブリガム・ヤング・ユニバーシティ Iso-truss structure
JP2007008272A (en) * 2005-06-29 2007-01-18 Asahi Tec Corp Seat frame
JP2014051155A (en) * 2012-09-06 2014-03-20 Toyota Boshoku Corp Seat flame for vehicle
JP2014088133A (en) * 2012-10-31 2014-05-15 Ts Tech Co Ltd Side frame equipped with air bag module and vehicle seat including the same
WO2015029131A1 (en) * 2013-08-27 2015-03-05 Ykk株式会社 Clip and cord
JP2015160457A (en) * 2014-02-26 2015-09-07 トヨタ自動車株式会社 vehicle seat
WO2017125492A1 (en) * 2016-01-20 2017-07-27 Intelprop S.A. Pivoting lifting ring for lifting loads

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004520539A (en) * 2000-07-28 2004-07-08 ブリガム・ヤング・ユニバーシティ Iso-truss structure
JP2007008272A (en) * 2005-06-29 2007-01-18 Asahi Tec Corp Seat frame
JP2014051155A (en) * 2012-09-06 2014-03-20 Toyota Boshoku Corp Seat flame for vehicle
JP2014088133A (en) * 2012-10-31 2014-05-15 Ts Tech Co Ltd Side frame equipped with air bag module and vehicle seat including the same
WO2015029131A1 (en) * 2013-08-27 2015-03-05 Ykk株式会社 Clip and cord
JP2015160457A (en) * 2014-02-26 2015-09-07 トヨタ自動車株式会社 vehicle seat
WO2017125492A1 (en) * 2016-01-20 2017-07-27 Intelprop S.A. Pivoting lifting ring for lifting loads

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