JP6642276B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat mounted on vehicles such as automobiles, airplanes, ships, and trains. More particularly, it relates to a vehicle seat having a shell-type frame.

  In the case of a vehicle seat having a shell-type frame, the shell-type frame, which is a structural body, is made of a fiber-reinforced composite resin material mainly containing resin and containing glass or carbon fiber as a reinforcing material. A seat pad as a cushioning material is placed on a shell-type frame for imparting a cushion feeling when the occupant is seated and for absorbing a shock at the time of a rear collision of the vehicle, and a seat cover as a skin material is placed thereon. Is covered. The shell-type frame has high rigidity and is hardly deformed, so that the seat pad mainly has a function of providing a cushion feeling when the occupant is seated and a function of absorbing a shock at the time of a rear collision of the vehicle. The vehicle seat provided with the shell-type frame described in Patent Document 1 has such characteristics.

JP 2008-545584 A

  In the technique of Patent Document 1, in order to increase the cushion feeling when the occupant is seated or to improve the shock absorbing performance at the time of a rear collision of the vehicle, it is necessary to increase the thickness of the seat pad in the front-rear direction. . When the thickness of the seat pad is increased, the thickness of the seat back or the seat cushion is increased, which may cause a problem in the layout of the cabin.

  In view of such a problem, an object of the present invention is to suppress the increase in the thickness of a seat back or a seat cushion in a vehicle seat having a shell-type frame, thereby ensuring cushioning when an occupant is seated and shock absorption during a vehicle collision. It is an object of the present invention to provide a vehicle seat that can be used.

  A first invention of the present invention relates to a vehicle seat, which is a shell-type seat frame, a seat pad serving as a cushion material placed on the seat frame, and covered from above to cover the seat pad. A seat cover which is a skin material, wherein the seat frame is provided with a through hole in a region sandwiched between side support portions that support the left and right sides of the body of the seated occupant, and from the peripheral edge of the through hole to the seating surface side. A planar elastic member covering the through hole is disposed at a separated position with its end fixed to the seat frame, and the planar elastic member is seated on the seat occupant via the seat pad placed thereon. When a force from is applied, a part thereof can enter the through hole.

  According to the first invention, the sheet pad is supported by the planar elastic member. As a result, the elasticity of the seat pad can be compensated for by the planar elastic member, so that a desired cushioning property can be ensured even if the thickness of the seat pad is reduced. Further, when a strong force is applied to the planar elastic member from the seated occupant via the seat pad at the time of a vehicle collision or the like, a part of the planar elastic member can enter the through hole. Thus, the shock absorbing property of the seat pad can be supplemented by the sheet elastic member without the seat pad being attached to the seat frame, so that the desired shock absorbing property can be ensured even if the thickness of the seat pad is reduced.

  According to a second aspect of the present invention, in the first aspect, the seat frame is a back frame, and the left and right ends of the planar elastic member extending in a vertical direction are fixed to the back frame. The end of the portion of the elastic member corresponding to the waist of the seated occupant is directly fixed to an upper arm which is a connecting member of the back frame to the cushion frame.

  According to the second aspect, the end of the portion of the planar elastic member corresponding to the waist of the seated occupant is a connecting member to the cushion frame and is fixed to the upper arm having high strength and rigidity. Large load that can be received.

  According to a third aspect of the present invention, in the second aspect, the end of a portion corresponding to the waist of a seated occupant of the planar elastic member includes a linear engagement member attached along the end. It is characterized by being fixed to the upper arm by engaging a linear engaged portion provided on the upper arm.

  According to the third aspect, the end of the portion corresponding to the waist of the seated occupant of the planar elastic member is linearly fixed to the upper arm, so that a large load applied at the time of a vehicle collision can be firmly received. .

  According to a fourth aspect of the present invention, in the third aspect, the linear engaging member is a plate-like member having a bead-shaped bulging portion, and the linear engaged portion is a cutting member having a linear opening. It is a raising part.

  According to the fourth invention, a simple structure can be achieved.

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects of the present invention, the length in the left-right direction between the end portions is increased from a portion corresponding to the waist of a seated occupant upward. It is characterized by being formed in.

  According to the fifth invention, the end fixed to the back frame of the planar elastic member corresponding to the waist of the seated occupant where the greatest force is applied to the planar elastic member from the seated occupant via the seat pad at the time of a vehicle collision. It is formed so that the length in the left-right direction between the portions is short and becomes longer as it goes upward. As a result, the portion of the planar elastic member corresponding to the waist of the seated occupant has a higher elastic modulus than the other portions, so that the waist can be firmly supported.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which looked at the vehicle seat which concerns on embodiment of this invention from diagonally front. FIG. 3 is an exploded perspective view of a seat back in the embodiment. The back cover is omitted. FIG. 3 is a sectional view taken along line III-III of FIG. 1. FIG. 4 is a sectional view taken along line IV-IV of FIG. 1. FIG. 5 is a sectional view taken along line VV of FIG. 1. It is VI-VI arrow line sectional drawing of FIG. FIG. 7 is an enlarged view of a portion VII in FIG. 3. FIG. 6 is an enlarged view of a portion VIII in FIG. 5.

  1 to 8 show one embodiment of the present invention. As shown in FIG. 1, the vehicle seat 10 of the present embodiment includes a seat cushion 20 serving as a seat surface and a seat back 30 serving as a backrest. The seat cushion 20 elastically supports the load of the occupant with a cushion pad placed on an iron cushion frame and covered with a skin. The seat back 30 supports a back surface of a seated person by placing a back pad 34 as a cushion material on a shell-type back frame 31 and covering the back pad 34 from above with a back cover 35 as a skin. is there. In each of the drawings, arrows indicate the directions of the automobile and the automobile seat 10 when the automobile seat 10 is attached to the automobile. In the following description, directions are described with reference to this direction. The vehicle seat 10 corresponds to a “vehicle seat” in the claims.

  As shown in FIG. 1, the seat cushion 20 is mounted on a floor F via a slide rail 21. The slide rail 21 is assembled so that the upper rail 21b can slide in the front-rear direction with respect to the lower rail 21a fixed to the floor F. A cushion frame (not shown) is attached to the upper rail 21b, and a lower arm 22 is attached to the rear end of the cushion frame. A cushion pad (not shown) made of urethane foam as a cushion material is placed on the cushion frame, and a cushion cover 23 as a skin is put on the cushion pad 23 to constitute the seat cushion 20. The position of the seat cushion 20 can be adjusted in the front-rear direction by the action of the slide rail 21.

  As shown in FIGS. 1 and 2, the seat back 30 includes a shell-type back frame 31, a back pad 34 placed thereon, and a back cover 35 placed thereon. The back frame 31 includes a back pan 32 and an upper arm 33. A back pan 32 is attached to an upper arm 33 attached to the lower arm 22 via a recliner 40 with bolts and nuts. The inclination of the seat back 30 with respect to the seat cushion 20 can be adjusted by the function of the recliner 40. The seat back 30 includes a seating surface portion 30A with which the back of the seated occupant abuts, a bank portion 30B that supports the upper body side of the seated occupant, and a headrest portion 30C that supports the head of the seated occupant. Here, the back frame 31, the back pad 34, and the back cover 35 correspond to “seat frame”, “seat pad”, and “seat cover” in the claims, respectively.

  As shown in FIG. 2, the back pan 32 is formed in a concave shape as viewed from the seating surface side so as to conform to the upper body shape of the seated person. A main part 32A that supports the back pad 34 of the seating surface part 30A from the back, a side part 32B that supports the back pad 34 of the bank part 30B from the back and the side, a headrest part 32C that supports the back pad 34 of the headrest part 30C from the back, Is provided. In the main portion 32A, an opening 32a is formed from a portion corresponding to the waist portion of the seated occupant to a slightly upper portion in the vertical direction. The opening 32a has a pentagonal shape when viewed from the front, and the portion corresponding to the waist of the seated occupant has the longest length in the left-right direction. The back pan 32 at the periphery of the opening 32a is slightly folded back toward the seating surface side to form a standing wall. As shown in FIG. 3 to FIG. 6, the side portion 32B of the back pan 32 and the terminal portion of the headrest portion 30C have a folded portion 32b which is folded around the entire periphery except for the lower portion in the surface direction opposite to the seating surface. Is formed. This is for inserting and fixing the epidermal terminal to the narrowed portion 32c formed between the folded portion 32b and the main body. Here, the opening 32a corresponds to a "through hole" in the claims. The side portion 32B corresponds to a “side support portion” in the claims.

  The back pan 32 is a panel-shaped member made of a so-called fiber-reinforced composite resin, and is formed by, for example, laminating a plurality of carbon fiber fabrics and compounding an epoxy resin as a matrix resin. The method of molding is such that when the upper and lower molds are closed, a predetermined number of carbon fiber fabrics are stacked and arranged in a cavity of a mold that forms a cavity having the same shape as the back pan 32, and a liquid hardening is performed there. Injecting a pre-epoxy resin, curing it by reaction, and removing it from the mold.

  As shown in FIG. 2, an upper arm 33 is attached to the lower end side of the side portion 32 </ b> B of the back pan 32 in contact with the inner surface of the seat by fastening bolts and nuts. The upper arm 33 is a press-formed part made of a steel plate, and includes a board portion 33a extending vertically along a surface inside the sheet of the side portion 32B, and a standing wall erected from the outer peripheral end portion of the board portion 33a toward the seat inside. A portion 33b. A cut-and-raised portion 33c having a substantially U-shaped cross section faces the opening 33c1 (see FIG. 8) toward the inside of the seat, and the opening 33c1 corresponds to the side portion 32B of the back pan 32 on the upper front end side of the substrate portion 33a. It is formed so as to be parallel to the front end outline. The cut-and-raised portion 33c engages and supports left and right ends of a planar elastic member 50 described later. The recliner 40 is attached to the outer surface of the seat at the lower end of the upper arm 33, and the lower arm 22 is attached to the outer surface of the seat of the recliner 40. The left and right recliners 40 are connected by a connecting rod 33d so that the left and right sides are synchronously locked and unlocked. Here, the cut-and-raised portion 33c corresponds to a “linear engaged portion” in the claims.

  As shown in FIG. 2, the planar elastic member 50 is a fabric having a strength for supporting a seated occupant and transmitting the load to the back frame 31, and a woven fabric or a knitted fabric made of polyester fiber is preferably used. The planar elastic member 50 is formed in a substantially inverted equilateral trapezoidal shape when viewed from the front. A resin plate-like member 51 having a bead-shaped bulging portion 51a at the tip is attached to the left and right ends of the lower portion 50A of the planar elastic member 50 by sewing S (see FIG. 7). Hook-shaped members 52 made of resin and having hook portions 52a at the ends are attached to both left and right ends of the upper portion 50B of the member 50 by sewing S. The attachment of the planar elastic member 50 to the back frame 31 is performed as follows. First, with respect to the lower portion 50A, the base of the bead-shaped bulge 51a of the plate-shaped member 51 is passed through the opening 33c1 of the cut-and-raised portion 33c of the upper arm 33 so that the bead-shaped bulge 51a is formed around the opening 33c1. This is done by locking it inside the part. Next, for the upper part 50B, the hook portion 52a of the hook-shaped member 52 is engaged with the folded portion 32b of the side portion 32B of the back pan 32. In a state where the lower portion 50A and the upper portion 50B of the planar elastic member 50 are attached to the back pan 32, the distance between the locking portions of the lower portion 50A is smaller than the distance between the locking portions of the upper portion 50B. I have. That is, the distance between the left and right ends of the lower part 50A corresponding to the waist of the seated occupant is shorter than that of the upper part 50B. Here, the plate member 51 corresponds to a “linear engagement member” in the claims. Further, the lower portion 50A corresponds to “a portion corresponding to the waist of a seated occupant” in the claims.

  As shown in FIG. 8, the plate-shaped member 51 is formed by forming a bead-shaped bulging portion 51a having a circular cross section on one end side of a flat plate portion 51b of a resin plate material such as polyethylene. The flat plate portion 51b is attached to the end of the planar elastic member 50 by sewing S. The flat plate portion 51b is cut and raised to pass through the opening 33c1 of the portion 33c from above or below, and is attached by locking the flat plate portion 51b side of the bead-shaped bulging portion 51a inside the peripheral portion of the opening 33c1.

  As shown in FIG. 7, the hook-shaped member 52 is a member having a constant cross section made of resin such as polyethylene, and has a hook portion 52a having a hook-like cross section formed on one end side of a flat plate portion 52b. The flat plate portion 52b is attached to the end of the planar elastic member 50 by sewing S. The hook 52a is attached by hooking the hook portion 52a on the folded portion 32b of the back pan 32.

  As shown in FIG. 2, the back pad 34 is made of urethane foam, and is slightly larger than the back pan 32 when viewed from the front. As shown in FIGS. 4 to 6, the large portion is a covering portion 34 a that covers the folded portion 32 b of the back pan 32 from the outside of the sheet. The thickness of the back pad 34 in the seating surface portion 30A is about 20 to 30 mm, which is about 20 to 30 mm smaller than the thickness of a pad normally used in an automobile seat having a shell type seat frame of this type. When the back pad 34 is placed on the back frame 31 on which the planar elastic member 50 is stretched, the covering portion 34a covers the folded portion 32b of the back pan 32 and is positioned. In this state, when the back cover 35 is put on the back pad 34 and the terminal of the back cover 35 is inserted into the narrowed portion 32c of the back pan 32, the seat back 30 is completed. The opening 32a of the back pan 32 may be configured to be covered from behind by a skin material different from the back cover 35 so that the inside is not visible.

  The embodiment configured as described above has the following operational effects. The back pad 34 is supported by the planar elastic member 50. Since the planar elastic member 50 has elasticity in the in-plane direction, the elasticity in the thickness direction of the back pad 34 can be supplemented, and a desired cushioning property can be ensured even when the thickness of the back pad 34 is reduced. . Further, when a strong force is applied to the sheet elastic member 50 from the seated occupant via the back pad 34 at the time of a car collision or the like, a part of the sheet elastic member 50 can enter the opening 32 a of the back pan 32. Have been. Accordingly, the shock absorption of the back pad 34 can be compensated for by the sheet elastic member 50 without the back pad 34 bottoming on the back pan 32. Therefore, a desired shock absorption can be ensured even when the thickness of the back pad 34 is reduced. can do.

  The portion where the largest force is applied to the planar elastic member 50 from the seated occupant via the back pad 34 at the time of a vehicle collision or the like is a portion corresponding to the waist of the seated occupant. The length of the planar elastic member 50 in this portion, that is, the length of the lower portion 50A of the planar elastic member 50 between the ends fixed to the back frame 31 in the left-right direction is short and becomes longer as it goes upward. Have been. As a result, the lower portion 50A, which is a portion of the planar elastic member 50 corresponding to the waist of the seated occupant, has a higher elastic modulus than the other portions and can firmly support the waist. Further, since the end of the lower portion 50A of the planar elastic member 50 is a connecting member to the cushion frame and is fixed to the upper arm 33 having high strength and rigidity, it can securely receive a large load applied at the time of an automobile collision. be able to.

  Further, the end of the lower portion 50A of the planar elastic member 50 is fixed to the linear cut-and-raised portion 33c of the upper arm 33 by the linear plate-shaped member 51, so that a large voltage applied at the time of a vehicle collision is applied. Load can be received firmly. In addition, the plate-shaped member 51 is a resin-made plate-shaped member having a bead-shaped bulging portion 51a, and the cut-and-raised portion 33c can be simultaneously formed at the time of press-forming the upper arm 33, so that the structure is simple.

  Although the specific embodiments have been described above, the present invention is not limited to the external appearance and the configuration, and various changes, additions, and deletions can be made without departing from the spirit of the present invention. For example, the following are mentioned.

  1. In the above-described embodiment, a carbon fiber woven fabric is used as the reinforcing material and a polypropylene resin is used as the matrix resin as the material of the back pan 32. However, the present invention is not limited to this. Etc. may be used. Further, a fiber-reinforced resin composited with a thermoplastic resin such as polypropylene or polyamide using short fibers such as carbon or glass as a reinforcing material may be injection-molded.

  2. In the above embodiment, the present invention is applied to the back pan 32 of the vehicle seat. However, the present invention is not limited to this, and may be applied to a shell-type cushion pan of the vehicle seat, or the cushion and the back may be integrated. It may be applied to a full bucket shell type frame.

  3. In the above embodiment, the end of the lower portion 50 </ b> A of the planar elastic member 50 is fixed to the cut-and-raised portion 33 c of the upper arm 33 by the plate-shaped member 51. However, the present invention is not limited to this, and may be fixed to the back pan 32 similarly to the upper part 50B.

  4. In the above embodiment, the present invention is applied to a seat for an automobile, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

10 Automotive seats (vehicle seats)
30 seat back 31 back frame (seat frame)
32 Back pan 32B Side part (side support part)
32a Opening (through hole)
33 Upper arm 33c Cut-and-raised portion (linear engaged portion)
34 back pad (seat pad)
35 Back cover (seat cover)
50 Lower part of 50A elastic member (part corresponding to the waist of a seated occupant)
51 plate member (linear engagement member)
51a Beaded bulge

Claims (4)

A vehicle seat,
A shell type seat frame, a seat pad as a cushion material placed on the seat frame, and a seat cover as a skin material covered from above covering the seat pad,
The seat frame is provided with a through hole in a region sandwiched between side support portions that support the left and right sides of the body of the seated occupant,
A planar elastic member that covers the through hole is disposed at a position separated from the peripheral edge of the through hole toward the seating surface with its end fixed to the seat frame,
When the force from the seated occupant is applied through the seat pad placed thereon, the planar elastic member is capable of partially entering the through hole ,
The seat frame is a back frame, and the left and right ends of the planar elastic member extending in the vertical direction are fixed to the back frame, and the end of a portion corresponding to the waist of a seated occupant of the planar elastic member. The vehicle seat is directly fixed to an upper arm which is a connecting member of the back frame to the cushion frame . 2. The linear engagement member according to claim 1, wherein the upper end of the planar elastic member has a linear engagement member attached to the upper arm at a portion corresponding to a waist of a seated occupant. A vehicle seat fixed to the upper arm by engaging the joint . 3. The vehicle seat according to claim 2, wherein the linear engaging member is a plate-like member having a bead-shaped bulging portion, and the linear engaged portion is a cut-and-raised portion having a linear opening . 4. The vehicle seat according to claim 2, wherein a length in the left-right direction between the end portions is increased from a portion corresponding to a waist portion of the seated occupant upward . 5.

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