JP2020128190A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which can enhance rigidity of a shell using fiber-reinforced plastic.SOLUTION: A vehicle seat includes at least one shell for supporting a seated person. At least the one shell is structured of a plate-like core material and fiber-reinforced plastic, and includes a surface layer arranged on a surface of the core material. The core material has at least one recess part arranged on the surface with the surface layer arranged.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to vehicle seats.

A seat arranged in a vehicle such as an automobile is known in which a shell made of fiber reinforced plastic is used as a support material (see Patent Document 1). In the sheet of the above publication, the hard foam is arranged on the surface of the shell.

JP, 2009-66128, A

Since the shell is made of a plate material, it has relatively low rigidity. In the sheet of the above publication, the rigid foam is adhered or welded to the shell, and the rigid foam and the shell are not integrally molded. Therefore, the rigid foam does not contribute to improving the rigidity of the shell.

It is an object of one aspect of the present disclosure to provide a vehicle seat that can enhance the rigidity of a shell made of fiber reinforced plastic.

One aspect of the present disclosure is a vehicle seat (1) that includes at least one shell (4) that supports a occupant. At least one shell (4) has a plate-shaped core material (41) and a surface layer (42) made of fiber reinforced plastic and disposed on the surface (41A) of the core material (41). .. The core material (41) has at least one recess (41C) provided on the surface (41A) on which the surface layer (42) is arranged.

According to such a configuration, since the core material (41) has the concave portion (41C), a part of the resin forming the surface layer (42) can be poured into the concave portion (41C). Therefore, the joint strength between the core material (41) and the surface layer (42) can be increased. Thereby, the rigidity of the shell (4) can be increased.

In one aspect of the present disclosure, the core material (41) may have a plurality of recesses (41C) as at least one recess. According to such a configuration, since unevenness is formed on the surface of the core material (41), the effect of improving the bonding strength between the core material (41) and the surface layer (42) is promoted.

In one aspect of the present disclosure, the core material (41) may have a band-shaped region (41D) having a larger thickness than other regions of the core material (41). At least one recess (41C) may be arranged in the strip-shaped region (41D). According to such a configuration, the rigidity of the shell (4) can be increased by the band-shaped region (41D). On the other hand, in the band-shaped region (41D), the shear strength decreases due to the increase in the thickness of the core material (41), but the recessed portion (41C) improves the bonding strength between the core material (41) and the surface layer (42). Therefore, the decrease in shear strength is suppressed. As a result, the rigidity of the entire shell (4) is improved.

One aspect of the present disclosure may include a seat cushion (2) and a seat back (3) having at least one shell (4). The strip region (41D) may extend from above the first end portion in the seat width direction of the seat back (3) to below the second end portion in the seat width direction. With such a configuration, the rigidity (that is, the magnitude of the second moment of area) of the shell (4) with respect to the twist (that is, the bending moment) in which stress is generated in the thickness direction of the shell (4) can be increased.

In one aspect of the present disclosure, the core material (41) may have a plurality of recesses (41C) arranged in the band-shaped region (41D) as at least one recess. With such a configuration, it is possible to efficiently increase the rigidity of the shell (4) with respect to the twist in which the stress is generated in the thickness direction of the shell (4).

Note that the reference numerals in the above parentheses are examples showing the correspondence with the specific configurations and the like described in the embodiments described later, and the present disclosure is limited to the specific configurations and the like indicated by the reference numerals in the parentheses. Not something.

1A and 1B are schematic perspective views of a vehicle seat according to an embodiment. FIG. 2 is a schematic plan view of a shell included in the seat back of the vehicle seat of FIG. 1. FIG. 3 is a schematic partial cross-sectional view taken along the line III-III in FIG. FIG. 4 is a schematic partial cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a schematic plan view of a shell in an embodiment different from FIG. 1.

Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
The vehicle seat 1 shown in FIGS. 1A and 1B includes a seat cushion 2 and a seat back 3.

The vehicle seat 1 of the present embodiment is used as a seat seat of a passenger car. In addition, the direction in the following description and each drawing means the direction in a state in which the vehicle seat 1 is assembled to a vehicle (that is, a passenger car). Further, in this embodiment, the seat width direction corresponds to the left-right direction of the vehicle, and the seat front corresponds to the front of the vehicle.

<Seat back>
The seat back 3 is a part for supporting the back of a seated person. The seat back 3 is connected to the seat cushion 2 described later by the two connecting portions 10 and 11 at both ends in the seat width direction.

The seat back 3 has a shell 4 curved in a concave shape so as to support a seated person, and a pad 5 covering the shell 4. The pad 5 has a cushion material such as urethane resin and a skin. As shown in FIG. 2-4, the shell 4 has a plate-shaped core material 41, a first surface layer 42, a second surface layer 43, and a plurality of joint portions 44.

(Core material)
The core member 41 is arranged in at least a portion of the seat back 3 that supports a seated person. The material of the core material 41 is not particularly limited, and resin, woven fabric, non-woven fabric, woven fabric, or the like can be used.

As shown in FIG. 3, the core material 41 has a plurality of recesses 41C provided on a first surface 41A on which a first surface layer 42 described later is arranged. The recess 41C is recessed in the thickness direction of the core material 41 (that is, in the direction away from the first surface 41A).

The planar shape of the recess 41C is not particularly limited, and may be a polygon (for example, a rectangle), a circle, an ellipse, or the like. The depth and area of the recess 41C and the interval between the plurality of recesses 41C are not particularly limited.

In addition, the core material 41 has a first strip-shaped region 41D and a second strip-shaped region 41E that are thicker than the other regions of the core material 41. As shown in FIG. 2, the first belt-shaped region 41D is located above the right end portion of the seat back 3 (that is, the right shoulder portion or the right shoulder peak point) to below the left end portion (that is, the connection portion with the seat cushion 2). ) Linearly extending toward. The second strip-shaped region 41E linearly extends from above the left end portion of the seat back 3 (that is, the left shoulder portion or left shoulder peak point) toward the bottom of the right end portion (that is, the connection portion with the seat cushion 2). ing.

Each of the first strip-shaped region 41D and the second strip-shaped region 41E has a constant width along the longitudinal direction. The first strip-shaped region 41D and the second strip-shaped region 41E overlap each other in the central portion of the seat back 3 in the seat width direction.

As shown in FIG. 4, the first band-shaped region 41D projects more toward the first surface layer 42 side (that is, the front of the seat) than the other regions of the core material 41. The surface of the first strip-shaped region 41D on which the second surface layer 43 is arranged (that is, the surface behind the seat) is flush with the surface of the other region of the core material 41. The shape of the second strip-shaped region 41E is the same as that of the first strip-shaped region 41D.

A plurality of recesses 41C are arranged in the first strip-shaped region 41D and the second strip-shaped region 41E. Of the plurality of recesses 41C included in the core material 41, all the recesses 41C may be arranged in the first strip-shaped region 41D and the second strip-shaped region 41E, or some of the recesses 41C may be disposed in the first strip-shaped region 41D. It may be arranged in the second strip region 41E.

That is, the plurality of recesses 41C may be arranged only in the first strip-shaped region 41D and the second strip-shaped region 41E, or the first strip-shaped region 41D and the second strip-shaped region 41E, and the first strip-shaped region 41D and the second strip-shaped region 41E. It may be arranged in both areas other than the area 41E.

The planar shape of the recess 41C arranged in the first strip-shaped region 41D and the second strip-shaped region 41E may be a rectangle having long sides parallel to the width direction of each strip-shaped region. By forming the recess 41C in such a planar shape, it is possible to increase the number of the recesses 41C arranged along the longitudinal direction of each strip-shaped region.

(surface)
The first surface layer 42 is disposed on the first surface 41A of the core material 41 in front of the seat. The second surface layer 43 is arranged on the second surface 41B (that is, the surface behind the seat) opposite to the first surface 41A on which the first surface layer 42 of the core material 41 is arranged. That is, the shell 4 has a sandwich structure in which the core material 41 is sandwiched between two surface layers.

The first surface layer 42 and the second surface layer 43 are each made of fiber reinforced plastic (FRP). The fiber reinforced plastic constituting each surface layer is a composite material obtained by impregnating a woven or knitted fabric of fibers with a resin.

As the fibers contained in the fiber-reinforced plastic, carbon fibers, glass fibers, metal fibers, resin fibers (for example, aramid fibers) and the like can be used. As the resin contained in the fiber reinforced plastic, a thermoplastic resin (eg, polyethylene, polypropylene, polyamide, polyphenylene sulfide, polyether ether ketone, etc.), a thermosetting resin (eg, unsaturated polyester, epoxy resin, polyimide, etc.), etc. Can be used.

The first surface layer 42 is bent along the first strip-shaped region 41D and the second strip-shaped region 41E of the core material 41 to form a step. Therefore, in the shell 4, the thickness of the portion of the core member 41 that overlaps the first strip-shaped region 41D and the second strip-shaped region 41E is made larger than the thickness of the other portions.

(Joint part)
The joint portion 44 is disposed in the recess 41C of the core material 41. The joint portion 44 is formed by filling the recess 41</b>C with the resin contained in the fiber-reinforced plastic forming the first surface layer 42.

The joining portion 44 joins the recess 41C with a portion of the first surface layer 42 that faces the recess 41C (that is, covers the recess 41C). In addition, a part of the fibers included in the fiber-reinforced plastic forming the first surface layer 42 may be present in the joint portion 44.

<Seat cushion>
The seat cushion 2 is a part for supporting the buttocks of a seated person. The seat cushion 2 is connected to the seat back 3 by the connecting portions 10 and 11.

The seat cushion 2 has a shell structure similar to that of the seat back 3. That is, the seat cushion 2 includes the shell 4 having at least the core material 41 and the first surface layer 42, and the pad 6 covering the shell 4. However, the shell 4 used for the seat cushion 2 does not have the first strip-shaped region 41D and the second strip-shaped region 41E.

[1-2. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1a) Since the core material 41 has the recess 41C, a part of the resin forming the first surface layer 42 can be poured into the recess 41C. Therefore, the bonding strength between the core material 41 and the first surface layer 42 can be increased. As a result, the rigidity of the shell 4 can be increased.

(1b) Since the unevenness is formed on the first surface 41A of the core material 41 by providing the plurality of recesses 41C in the core material 41, the effect of improving the bonding strength between the core material 41 and the first surface layer 42 is promoted. To be done.

(1c) Increasing the rigidity (that is, the magnitude of the second moment of inertia of area) of the shell 4 against torsion (that is, bending moment) in which stress is generated in the thickness direction of the shell 4 by the first strip-shaped region 41D and the second strip-shaped region 41E You can On the other hand, in the first strip-shaped region 41D and the second strip-shaped region 41E, the shear strength decreases due to the increase in the thickness of the core material 41, but the recessed portion 41C improves the bonding strength between the core material 41 and the first surface layer 42. Therefore, the decrease in shear strength is suppressed. As a result, the rigidity of the entire shell 4 is improved.

(1d) By disposing the plurality of recesses 41C in the first strip-shaped region 41D and the second strip-shaped region 41E, it is possible to efficiently increase the rigidity of the shell 4 with respect to the twist in which stress is generated in the thickness direction of the shell 4.

[2. Other Embodiments]
Although the embodiments of the present disclosure have been described above, it is needless to say that the present disclosure is not limited to the above embodiments and can take various forms.

(2a) In the vehicle seat 1 of the above embodiment, the core material 41 may have only one recess 41C. The recess 41C may be provided on the second surface 41B in addition to the first surface 41A, or may be provided only on the second surface 41B.

(2b) The shape and position of the belt-shaped region of the core material 41 in the vehicle seat 1 of the above embodiment are examples. For example, as shown in FIG. 5, the core member 41 has a third belt-shaped region 41F that linearly extends downward from above the right end portion of the seat back 3 (that is, from the right shoulder portion or the right shoulder peak point). The seat back 3 may have a fourth strip-shaped region 41G that linearly extends downward from above the left end portion (that is, the left shoulder or the left acromion point).

(2c) In the vehicle seat 1 of the above-described embodiment, the strip-shaped region of the core material 41 may project to the second surface layer 43 side (that is, the seat rear side). Further, the core material 41 does not necessarily have to have the band-shaped region.

(2d) In the vehicle seat 1 of the above embodiment, one of the seat cushion 2 and the seat back 3 may not have the shell 4. That is, only the seat cushion 2 may have the shell 4, or only the seat back 3 may have the shell 4.

(2e) The vehicle seat 1 of the above-described embodiment can be applied not only to the above-described seats for automobiles but also for seats for vehicles other than automobiles, such as railway vehicles, ships, and aircraft.

(2f) The functions of one constituent element in the above-described embodiment may be distributed as a plurality of constituent elements, or the functions of a plurality of constituent elements may be integrated into one constituent element. Moreover, you may omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above-described embodiment may be added to or replaced with the configuration of the other above-described embodiment. It should be noted that all aspects included in the technical idea specified by the wording recited in the claims are embodiments of the present disclosure.

1... Vehicle seat, 2... Seat cushion, 3... Seat back, 4... Shell,
5, 6... Pads, 10, 11... Connecting portions, 41... Core material, 41A... First surface,
41B... 2nd surface, 41C... recessed part, 41D... 1st strip|belt-shaped area|region, 41E... 2nd strip|belt-shaped area|region,
41F... 3rd strip|belt-shaped area|region, 41 G... 4th strip|belt-shaped area|region, 42... 1st surface layer, 43... 2nd surface layer,
44... Joint.

Claims (5)

Comprises at least one shell for supporting a seated person,
The at least one shell is
A plate-shaped core material,
A surface layer composed of fiber reinforced plastic and arranged on the surface of the core material,
Have
The said core material is a vehicle seat which has at least 1 recessed part provided in the surface in which the said surface layer is arrange|positioned. The vehicle seat according to claim 1,
The said core material is a vehicle seat which has several recessed part as said at least 1 recessed part. The vehicle seat according to claim 1 or 2, wherein
The core material has a band-shaped region having a larger thickness than other regions in the core material,
The vehicle seat, wherein the at least one recess is arranged in the band-shaped region. The vehicle seat according to claim 3, wherein:
Seat cushion,
A seat back having the at least one shell,
Equipped with
The vehicle seat, wherein the belt-like region extends from above a first end portion in the seat width direction of the seat back to below a second end portion in the seat width direction. The vehicle seat according to claim 3 or 4, wherein:
The vehicle seat, wherein the core member has a plurality of recesses arranged in the strip-shaped region as the at least one recess.

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