JP2024030606A - vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle seat including a pad material which enables improvement of rigidity of both side parts as seen in a seat width direction with a simple structure.

SOLUTION: A seat material 50 is provided along a seat width direction and a seat vertical direction, including expansion parts 30 of a seat back pad 18. The structure enables improvement of rigidity of peripheral parts (an outer part 32 and an inner part 34) including the expansion parts 30 and can inhibit collapse of the expansion parts 30, caused during covering of a seat back cover 20, with a simple structure. In other words, in an embodiment, rigidity of the side parts 24, 26 can be improved with the simple structure.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a vehicle seat.

Patent Document 1 listed below discloses a technology related to a cushion (pad material) provided in an automobile seat. In this prior art, a breathable sheet is integrally fixed to the parts of the foam corresponding to both sides of the inner body (pad material), and the overlapping parts of the foam and the breathable sheet are impregnated with a foaming agent. An impregnated layer is formed. This impregnated layer reinforces both sides of the midbody.

Japanese Patent Application Publication No. 2003-153762

However, if the surface of the pad material is soft, there is a possibility that the seat cover (seat skin) may collapse or fall on both sides in the width direction of the seat during covering.

The present invention has been made in consideration of the above facts, and an object of the present invention is to obtain a vehicle seat equipped with a pad material that can improve the rigidity of both sides in the width direction of the seat with a simple configuration.

The vehicle seat according to the invention according to claim 1 includes a pad material that supports an occupant seated on a seat body, and a seat skin that covers a surface of the pad material, and the pad material has a A main part that constitutes the center part in the seat width direction and supports the occupant along the thickness direction of the pad material, and a main part that constitutes the center part in the seat width direction and supports the occupant along the thickness direction of the pad material, and a main part that constitutes the center part in the seat width direction, and a main part that constitutes the center part in the seat width direction and supports the occupant along the thickness direction of the pad material, and a pair of side portions provided with bulges that protrude along the thickness direction of the padding material and support the occupant from the side; It is configured to include a pair of sheet members provided along substantially orthogonal directions and each integrated with the bulge.

The vehicle seat according to the first aspect of the invention includes a pad material and a seat skin, and the surface of the pad material that supports an occupant seated on the seat body is covered by the seat skin. Here, the pad material includes a main part, a pair of side parts, and a sheet material.

The main portion constitutes a central portion of the pad material in the seat width direction, and the main portion supports an occupant seated on the seat body along the thickness direction of the pad material. On the other hand, the pair of side parts constitute both sides of the pad material in the sheet width direction, and are provided with a bulge that protrudes from the surface of the main part along the thickness direction of the pad material. An occupant seated on the seat body is supported from the side by the portion.

Further, the pair of sheet materials are provided along the sheet width direction and a direction substantially perpendicular to the sheet width direction including bulges provided at the pair of side portions, and the bulges are integrated with each other. In this way, by integrating the sheet material in the pad material, it is possible to improve the rigidity of the pad material, compared to a case where no sheet material is provided.

As a comparative example, in a structure in which the side portion of the pad material protrudes from the surface of the main portion along the thickness direction of the pad material, if the rigidity of the tip of the side portion is low, the side portion of the pad material may be damaged when covering the seat skin. There is a concern that the tip of the tube may collapse.

However, in the present invention, since the sheet material is provided along the sheet width direction and the direction substantially perpendicular to the sheet width direction, including the bulge (the tip of the side part), the bulge It becomes possible to improve the rigidity of the peripheral part including the seat skin, and it becomes possible to suppress collapse of the bulge when covering the seat skin with a simple structure.

Note that the "pad material" includes, for example, a seat cushion that supports the buttocks of an occupant seated on the seat body, or a seat back that supports the back of the occupant. Furthermore, "including the bulge" means that not only the bulge but also the surrounding area of the bulge is included.

The vehicle seat according to the invention set forth in claim 2 is the vehicle seat according to the invention set forth in claim 1, wherein the sheet material further includes a continuous part connecting the main part and the side part. It is being

In the vehicle seat according to the invention as set forth in claim 2, the sheet material is provided further including a continuous part connecting the main part and the side part of the pad material, and the continuous part connects the main part and the side part of the pad material. It extends around the periphery of the section.

If the side part protrudes beyond the surface of the main part along the thickness direction of the padding material, when covering the seat skin, in addition to the collapse of the tip of the side part, the side part may also collapse towards the center part in the seat width direction. There is a concern that the person may collapse.

However, in the present invention, since the sheet material is provided from the periphery of the bulge to the periphery of the continuous part, the rigidity is reduced from the periphery of the bulge to the periphery of the continuous part. This makes it possible to suppress the collapse of the bulge and the collapse of the bulge when covering the seat skin.

Note that "including the continuous part" means that not only the continuous part but also the peripheral part of the continuous part is included.

The vehicle seat according to the invention according to claim 3 is the vehicle seat according to the invention according to claim 1, wherein the seat skin is constituted by a plurality of skin pieces, and is a part of the plurality of skin pieces. Tension is applied to the sheet skin at a sewing part connecting the main skin covering the surface of the main part and the side skin forming another part of the plurality of skin pieces and covering the surface of the side part. It is set to be locked to the pad material side through a locking part provided on the sewn part in the sewn state.

In the vehicle seat according to the third aspect of the invention, the seat skin is composed of a plurality of skin pieces. In addition, the seat skin includes a main skin that forms part of the plurality of skin pieces and covers the surface of the main part of the pad material, and a main skin that forms part of the plurality of skin pieces and covers the surface of the main part of the pad material, and a side part of the pad material that forms another part of the plurality of skin pieces of the seat skin. The side skin covering the front surface is sewn (connected) at the sewing part. This sewn portion is configured to be locked to the pad material side via a locking portion provided in the sewn portion while tension is applied to the seat skin.

That is, when covering the seat skin, the sewing part side that connects the main skin and the side skin through the locking part is locked to the pad material side, and in this state, tension is applied to the seat skin. In the present invention, it is possible to improve the rigidity of the peripheral part including the continuous part from the bulge, so it is possible to suppress the collapse of the bulge and the collapse of the bulge when covering the seat skin. becomes.

The vehicle seat according to the invention set forth in claim 4 is the vehicle seat according to the invention set forth in claim 3, wherein a through hole is formed in the sheet material at a portion corresponding to the locking portion. .

In the vehicle seat according to the fourth aspect of the present invention, a through hole is formed in the sheet material. This through-hole is pre-formed in a corresponding part to the locking part provided in the sewn part of the seat skin, and when covering the seat skin, the locking part is locked to the pad material side through the through-hole. can be done.

The vehicle seat according to the invention set forth in claim 5 is the vehicle seat according to the invention set forth in claim 1, wherein the sheet material is provided with a fixing member fixed to a mold for molding the pad material. It is being

In the vehicle seat according to the fifth aspect of the invention, the sheet material is provided with a fixing member, and the sheet material is fixed to a mold for molding the pad material via the fixing member. Thereby, in the present invention, when molding the pad material, it is possible to integrally mold the sheet material with the pad material while being fixed to the mold. Therefore, compared to, for example, the case where the sheet material is bonded to the pad material and the sheet material is integrated with the pad material, in the present invention, the bonding work is reduced and work efficiency is improved.

A vehicle seat according to a sixth aspect of the present invention is a vehicle seat according to a first aspect of the invention, wherein the sheet material is made of the same material as the pad material.

In the vehicle seat according to the invention described in claim 6, since the sheet material is formed of the same material as the pad material, there is no need to separate the sheet material and the pad material during recycling, and recyclability is improved. do.

As described above, the vehicle seat according to the present invention has the excellent effect of improving the rigidity of both sides of the pad material in the seat width direction with a simple configuration.

FIG. 1 is a perspective view of the vehicle seat according to the present embodiment, viewed diagonally from the left front and above. 2 is a sectional view of the seat back taken along line A-A' shown in FIG. 1. FIG. FIG. 2 is a plan view showing a sheet material forming part of a seat back pad applied to the vehicle seat of the present embodiment. FIG. 2 is an exploded perspective view showing a lower die of a mold for molding a sheet material constituting a part of a seat back pad applied to the vehicle seat of the present embodiment and the seat back pad. FIG. 3 is a cross-sectional view showing a lower die of a mold for molding a seat back pad applied to a vehicle seat according to the present embodiment. FIG. 2 is a cross-sectional view showing a state in which a sheet material is inserted into the lower mold of a mold for molding a seat back pad applied to a vehicle seat according to the present embodiment. FIG. 2 is a cross-sectional view showing a state in which urethane is injected into the lower mold of a mold for molding a seat back pad applied to a vehicle seat according to the present embodiment. FIG. 2 is a sectional view showing a state in which an upper mold is set in a lower mold of a mold for molding a seat back pad applied to a vehicle seat according to the present embodiment. FIG. 2 is a cross-sectional view showing a state in which urethane in a mold for molding a seat back pad applied to a vehicle seat of the present embodiment is foamed and a seat back pad is molded. FIG. 3 is a cross-sectional view corresponding to FIG. 2 as a comparative example.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to an embodiment of the present invention will be described below with reference to the drawings. In addition, in the following explanation, when referring to the front, rear, left, right, top, and bottom directions, the directions are meant to indicate the front, rear, left, right, top, and bottom directions as seen from the passenger seated in the vehicle seat, and the arrow FR shown as appropriate in each figure indicates the forward direction. , arrow UP indicates upward direction, and arrow RH indicates right direction. Further, the left and right direction coincides with the sheet width direction.

(Configuration of vehicle seat)
First, the configuration of the vehicle seat according to this embodiment will be described.

As shown in FIG. 1, the vehicle seat (seat body) 10 of the present embodiment includes a seat cushion 12 that supports the buttocks and thighs of an occupant, a seat back 14 that supports the upper body of the occupant, and a seat back 14 that supports the occupant's upper body. The headrest 16 supports the head of the person.

Here, the seat back 14 in this embodiment includes a seat back frame 17 (see FIG. 2) which is a skeletal member of the seat back 14, a seat back pad (pad material) 18 that elastically supports the occupant, A seat back skin (seat skin) 20 that covers the seat back pad 18 is provided.

The seat back frame 17 is made of, for example, a steel plate, an aluminum alloy, or the like. Further, the seat back pad 18 is made of a foam material such as urethane foam, for example.

On the other hand, the seat back skin 20 is formed of, for example, cloth material, leather, synthetic leather, PVC, etc., and a plurality of skin pieces (a main skin 36, side skins 38, 40, etc. to be described later) are sewn together. It is integrally formed by. The seat back pad 18 is covered with this seat back skin 20. Although not shown, the seat back skin 20 may be formed of a single skin piece.

Here, as shown in FIG. 2, the seat back pad 18 includes a main part 22 provided at the center in the seat width direction, and side parts 24 provided on both sides in the seat width direction with the main part 22 in between. , 26. The main part 22 and the side parts 24 and 26 are connected to each other via a continuous part 28, and the continuous part 28 has a groove 28A recessed along the thickness direction (seat front-rear direction) of the seat back pad 18. is formed.

The main portion 22 has a substantially rectangular plate shape and supports the upper body of the occupant from the back side along the thickness direction of the seat back pad 18. On the other hand, the side portions 24 and 26 include a bulge portion 30 that protrudes forward from the surface 22A of the main portion 22, and the bulge portion 30 supports the upper body of the occupant from the side. do.

Note that the bulging portion 30 is formed in an arc shape, and the side portions 24 and 26 are connected to the bulging portion 30 and an outer portion 32 located on the outside in the seat width direction and extending toward the rear side of the seat. and an inner portion 34 located on the inner side in the seat width direction and extending toward the rear side of the seat. That is, strictly speaking, the bulging portion 30 includes a portion of the outer portion 32 and the inner portion 34.

On the other hand, the seat back skin 20 includes a main skin (skin piece) 36 that covers the surface of the main part 22 of the seat back pad 18, a side skin (skin piece) 38 that covers the surface of the side parts 24 and 26 of the seat back pad 18, 40. The main skin 36 and the side skins 38 and 40 are connected to each other via a sewn part 42, and the sewn part 42 can be accommodated in a groove 28A provided in the continuous part 28 of the seat back pad 18. Ru.

For example, the seat back pad 18 has an insert wire 45 embedded in the groove 28A. On the other hand, on the side of the seat back skin 20, a locking part (not shown) is provided in the sewn part 42, and when covering the seat back skin 20, a hog ring or the like is provided in a state where tension is applied to the seat back skin 20. The locking portion is locked to the insert wire 45 by a fixture.

Here, in this embodiment, from the bulging part 30 of the seat back pad 18 and its surrounding parts (outer part 32, inner part 34) to the continuous part 28 (groove part 28A) and its surrounding part (end face 22B of the main part 22). ), the sheet material 50 is provided along the sheet width direction and the sheet up-down direction (direction substantially orthogonal to the sheet width direction).

The sheet material 50 is preferably made of substantially the same material as the seat back pad 18. For example, in this embodiment, the sheet material 50 is a urethane film material having a thickness of about 0.5 to 3 mm.

Further, as shown in FIG. 3, the sheet material 50 has a substantially rectangular shape, and magnets (fixing members) 52 are provided at the corners of the sheet material 50. Furthermore, in the sheet material 50, a rectangular through hole whose longitudinal direction is along the width direction of the sheet material 50 is provided at one end 50A side in the longitudinal direction of the sheet material 50 arranged along the sheet width direction. A plurality of (here, three) 54 are formed.

A magnet (fixing member) 56 is provided on the opposite side of the magnet 52 provided at the corner on the one end 50A side of the sheet material 50 in the longitudinal direction with this through hole 54 in between. Furthermore, magnets (fixing members) 58 are provided at one end 50A and the other end 50B of the sheet material 50 in the longitudinal direction, respectively, between the magnets 52 provided at the corners of the sheet material 50. These magnets 52, 56, and 58 can be magnetically attached to a mold 60 (see FIG. 4), which will be described later, for foam-molding the seat back pad 18.

(Functions and effects of vehicle seats)
First, a method for forming the seat back pad 18 will be explained.

As shown in FIG. 9, the mold 60 includes a lower mold 62 and an upper mold 64. As shown in FIGS. 5 and 6, in this embodiment, the sheet material 50 is inserted into the lower mold 62, and the sheet material 50 is placed at a predetermined position with respect to the lower mold 62.

As mentioned above, the seat back skin 20 is covered with the seat back pad 18 using a fixing tool such as a hog ring, but at that time, a special jig is attached to the insert wire 45 side provided on the seat back pad 18. It is necessary to enter. For this reason, a mounting portion 66 (see FIG. 2) is recessed in the groove portion 28A of the seat back pad 18.

Therefore, as shown in FIG. 4, the lower die 62 is provided with a protruding portion 68 for forming the attachment portion 66. The protruding portion 68 has a substantially rectangular parallelepiped shape. On the other hand, as shown in FIG. 3, the sheet material 50 is formed with a through hole 54 through which the protrusion 68 can be inserted. Therefore, in this embodiment, the sheet material 50 is positioned with respect to the lower mold 62 with the protrusion 68 shown in FIG. 4 inserted into the through hole 54 formed in the sheet material 50.

Here, as shown in FIG. 4, the sheet material 50 is formed in the lower die 62 along the shape for forming the bulge 30 and the groove 28A on the design surface side of the seat back pad 18 shown in FIG. Pre-formed. Since the sheet material 50 is provided with magnets 52, 56, and 58, the sheet material 50 can be magnetically attached to the lower die 62.

On the lower mold 62 side, a positioning part 70 is provided in advance at a position where the magnets 52, 56, 58 are magnetically attached, and by magnetically attaching the magnets 52, 56, 58 to the positioning part 70, the sheet material is The outer edge of the mold 50 can be fixed to the lower mold 62 . In addition, regarding the positioning part 70, it is sufficient if a mark is simply shown so that the position can be recognized.

As shown in FIG. 6, in this embodiment, the seat back pad 18 is formed in the lower mold 62 as shown in FIG. 7, with the sheet material 50 fixed to the lower mold 62. Inject urethane 72.

Next, as shown in FIG. 8, the upper mold 64 is set on the lower mold 62. When the injected urethane 72 foams after a predetermined period of time has elapsed, the sheet material 50 and the seat back pad 18 are integrated with each other in this embodiment, as shown in FIG. 9 . Although not shown, the upper die 64 is opened and the seat back pad 18 with the sheet material 50 is removed from the lower die 62.

The seat back pad 18 with the sheet material 50 formed as described above is covered with the seat back skin 20 and attached to the seat back frame via the seat back skin 20, as shown in FIG.

Next, the functions and effects of the vehicle seat according to this embodiment will be explained.

In this embodiment, as shown in FIG. 2, the seat back pad 18 and the seat back skin 20 are provided, and the seat back skin is composed of a plurality of skin pieces (main skin 36, side skins 38, 40, etc.). 20 covers the surface of the seat back pad 18 that supports the occupant seated on the vehicle seat 10.

Here, the seat back pad 18 is configured to include a main part 22, a pair of side parts 24 and 26, and a sheet material 50, and the pair of side parts 24 and 26 have a lower surface than the surface 22A of the main part 22. A bulge 30 is provided that protrudes along the thickness direction of the seat back pad 18. The sheet material 50 is provided along the sheet width direction and the sheet up-down direction including the bulge 30, and is integrated with the bulge 30.

In this way, by integrating the sheet material 50 in the seat back pad 18, it is possible to improve the rigidity of the seat back pad 18 with a simple configuration compared to a case where the sheet material 50 is not provided. becomes.

By the way, in this embodiment, the main skin 36 and the side skins 38 and 40 of the seat back skin 20 are sewn at the sewing part 42. In this sewn portion 42, the seat back skin 20 is secured to the seat back pad 18 side via a locking portion (not shown) provided in the sewn portion 42 while tension is applied to the seat back skin 20. It is set.

That is, when covering the seat back skin 20, the sewing part 42 side that connects the main skin 36 and the side skins 38, 40 via the locking part is locked to the seat back pad 18 side, and in this state, the seat back skin 20 is applied with tension.

As a comparative example, as shown in FIG. 10, in the seat back pad 100, when the rigidity of the tip 102A of the side portion 102 is low, when covering the seat back skin 104, the tip 102A of the side portion 102 has low rigidity. There is a concern that it may collapse (see the two-dot chain line).

On the other hand, in the present embodiment, as shown in FIG. It becomes possible to improve the rigidity of the peripheral parts including the outer part 32 and the inner part 34, and it becomes possible to suppress collapse of the bulging part 30 when covering the seat back skin 20 with a simple configuration. .

Here, to specifically explain the range in which the sheet material 50 is provided, in this embodiment, the sheet material 50 includes, in addition to the bulge portion 30 of the seat back pad 18, the main portion 22, the side portion 24, It further includes a connecting part 28 connecting the parts 26.

In other words, in the present embodiment, the seatback pad 18 includes the bulge 30 and the groove 28A from the outer side 32 (periphery of the bulge 30) of the side portions 24, 26, and the end surface 22B (continuously connected) of the main portion 22. It is provided over the periphery of the portion 28).

As a comparative example, as shown in FIG. 10, when the rigidity of the tip 102A of the side portion 102 is low, the tip 102A of the side portion 102 collapses (indicated by a chain double-dashed line) when covering the seat back skin 104. In addition, the side portion 102 falls down toward the center in the seat width direction starting from the groove portion 106 (as shown by the arrow), and wrinkles occur on the surface of the seat back skin 104 (particularly on the inner side 102B side of the side portion 102). there's a possibility that.

On the other hand, in the present embodiment, as shown in FIG. This makes it possible to improve the rigidity of the peripheral part including the groove part 28A, and it becomes possible to suppress collapse of the bulge part 30 and collapse of the bulge part 30 when covering the seat back skin 20.

Further, in this embodiment, as shown in FIG. 4, the sheet material 50 has a locking portion (not shown) that locks the insert wire 45 provided on the seat back pad 18 side in advance at a corresponding portion. A through hole 54 is formed. Therefore, when covering the seat back skin 20, the locking portion can be locked to the seat back pad 18 side through the through hole 54.

Furthermore, in this embodiment, as shown in FIG. It is fixed to a mold 60 (see FIG. 4) for molding. Accordingly, in this embodiment, when molding the seat back pad 18, the sheet material 50 can be integrally molded with the seat back pad 18 while being fixed to the mold 60, as shown in FIG. It becomes possible.

Therefore, as a comparative example, although not shown, in this embodiment, the bonding work is is reduced and work efficiency is improved.

Further, in this embodiment, the sheet material 50 is made of the same material as the seat back pad 18. This eliminates the need to separate the sheet material 50 and the seat back pad 18 during recycling, improving recyclability.

In addition, in this embodiment, although the seat back 14 was demonstrated, it may be applied to the seat cushion 12.

In addition, the present invention can be implemented with various modifications without departing from the gist thereof. Further, it goes without saying that the scope of the rights of the present invention is not limited to the above-described embodiments or each of the above-described modifications.

<Additional notes>
Note that the vehicle seat according to the present invention may be made by appropriately combining the following configurations.

(Configuration 1)
The vehicle seat includes a pad material that supports an occupant seated on a seat body, and a seat skin that covers a surface of the pad material, and the pad material constitutes a central portion of the pad material in the seat width direction. , comprising a main part that supports the occupant along the thickness direction of the pad material, and both sides of the pad material in the seat width direction, and protrudes beyond the surface of the main part along the thickness direction of the pad material. a pair of side parts provided with bulges that support the occupant from the lateral side; and a pair of side parts each including the bulges and extending along a seat width direction and a direction substantially orthogonal to the seat width direction. , and a pair of sheet materials each of which is integrated with the bulge.

(Configuration 2)
The sheet material further includes a continuous portion connecting the main portion and the side portion.

(Configuration 3)
The seat skin is composed of a plurality of skin pieces, a main skin forming a part of the plurality of skin pieces and covering the surface of the main part, and a main skin forming another part of the plurality of skin pieces and covering the surface of the side part. A sewing part that connects the side skin covering the surface is set to be locked to the pad material side through a locking part provided in the sewing part while tension is applied to the seat skin. has been done.

(Configuration 4)
A through hole is formed in the sheet material at a portion corresponding to the locking portion of Structure 3.

(Configuration 5)
The sheet material is provided with a fixing member that is fixed to a mold for molding the pad material.

(Configuration 6)
The sheet material is made of the same material as the pad material.

10 Vehicle seat (seat body)
12 Seat cushion 14 Seat back 17 Seat back frame 18 Seat back pad (pad material)
20 Seat back skin 22 Main part 22A Surface (Surface of main part)
24 Side part 26 Side part 28 Continuous part 28A Groove part (continuous part)
30 Swelling part 36 Main epidermis (epidermal piece)
38 Side epidermis (epidermis piece)
40 Side skin (skin piece)
42 Sewing part 50 Sheet material 52 Magnet (fixing member)
54 Through hole 56 Magnet (fixing member)
58 Magnet (fixed member)
60 Mold

Claims (6)

A pad material that supports an occupant seated on the seat body;
a sheet skin covering the surface of the pad material;
Equipped with
The pad material is
a main portion that constitutes a central portion of the pad material in the seat width direction and supports the occupant along the thickness direction of the pad material;
A pair of sides forming both sides of the pad material in the seat width direction, and provided with a bulge portion that protrudes from the surface of the main portion along the thickness direction of the pad material and supports the occupant from the side. Department and
a pair of sheet materials that are provided along the sheet width direction and a direction substantially orthogonal to the sheet width direction, each including the bulge, and are each integrated with the bulge;
A vehicle seat that includes: The vehicle seat according to claim 1, wherein the sheet material further includes a continuous portion connecting the main portion and the side portion. The seat skin is composed of a plurality of skin pieces, a main skin forming a part of the plurality of skin pieces and covering the surface of the main part, and a main skin forming another part of the plurality of skin pieces and covering the surface of the side part. A sewing part that connects the side skin covering the surface is set to be locked to the pad material side through a locking part provided in the sewing part while tension is applied to the seat skin. The vehicle seat according to claim 1, wherein the vehicle seat is The vehicle seat according to claim 3, wherein the sheet material has a through hole formed in a portion corresponding to the locking portion. The vehicle seat according to claim 1, wherein the sheet material is provided with a fixing member that is fixed to a mold for molding the pad material. The vehicle seat according to claim 1, wherein the sheet material is made of the same material as the pad material.