JP2022104030A - Seat - Google Patents

Abstract

To provide a seat that has a large amount of deflection in a low-load condition and that comprises a pad hardly associated with a bottom touching feeling.SOLUTION: A vehicle seat S includes a seat frame (cushion frame F1), a pad (cushion pad 30) that covers the seat frame, and a skin material 40 that covers the pad. The pad has a first pad layer (urethane layer 31) that is made of a urethane foam, and a second pad layer (latex layer 32) that is arranged between the first pad layer and the skin material 40. The second pad layer is made of profile urethane, a net-like resin structure or a latex foam.SELECTED DRAWING: Figure 3

Description

The present invention relates to a seat with a pad that supports the seated person.

Conventionally, a seat provided with a seat frame and a pad to be put on the seat frame is known (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2020-157856

By the way, in order to improve the sitting comfort, it is desired that the pad has a large amount of deflection under a low load and has a property that it is difficult to feel a bottoming feeling.

Therefore, an object of the present invention is to provide a sheet provided with a pad having a large amount of deflection under a low load and a feeling of bottoming out.

In order to solve the above problems, the sheet according to the present invention includes a seat frame, a pad to be put on the seat frame, and a skin material to be put on the pad.
The pad has a first pad layer made of urethane foam and a second pad layer arranged between the first pad layer and the skin material.
The second pad layer is made of profile urethane, reticulated resin structure or latex foam.

According to this configuration, the second pad layer arranged between the skin material and the first pad layer made of urethane foam is made of profile urethane, reticulated resin structure or latex foam, so that the pad can be loaded with a low load. It is possible to create a structure that has a large amount of deflection and does not give a feeling of bottoming out.

Further, the pad has a third pad layer arranged between the second pad layer and the skin material, the second pad layer is made of latex foam, and the third pad layer is profile urethane. Alternatively, it may consist of a net-like resin structure.

Further, the pad has a fourth pad layer arranged between the third pad layer and the skin material, the third pad layer is made of a mesh resin structure, and the fourth pad layer is: It may be made of profile urethane.

Further, the pad may have a high hardness slab layer which is arranged between the second pad layer and the third pad layer and is harder than the urethane foam.

Further, the pad may have a soft slab layer softer than the urethane foam, which is arranged between the fourth pad layer and the skin material.

Further, the pad may have a low-resilience slab layer having a repulsive force lower than that of the urethane foam, which is arranged between the fourth pad layer and the soft slab layer.

Further, the seat may be an S spring spanned over the seat frame and may include an S spring that supports the first pad layer.

Further, the pad has a third pad layer arranged between the second pad layer and the skin material, the second pad layer is made of a mesh resin structure, and the third pad layer is: It may be made of profile urethane.

Further, the pad may have left and right side portions that sandwich the second pad layer from the left and right directions, and may have side portions that are harder than the second pad layer.

According to this configuration, since the second pad layer is sandwiched from the left-right direction by the left and right side portions that are harder than the second pad layer, it is possible to satisfactorily suppress the second pad layer from shifting to the left and right.

Further, the left and right side portions and the first pad layer may be integrally formed.

According to this configuration, the structure of the pad can be simplified as compared with the case where the side portion and the first pad layer are separate members.

According to the present invention, it is possible to provide a sheet provided with a pad having a large amount of deflection under a low load and a feeling of bottoming out.

Further, by making the left and right side portions sandwiching the first pad layer and the second pad layer from the left and right directions harder than the second pad layer, it is possible to satisfactorily suppress the displacement of each pad layer to the left and right by the side portions. can.

Further, by integrally forming the left and right side portions and the first pad layer, the structure of the pad can be simplified.

It is a perspective view of the sheet which concerns on 1st Embodiment of this invention. It is a perspective view of the seat frame built in the seat. It is sectional drawing which cut the seat cushion by the plane orthogonal to the left-right direction. It is sectional drawing which cut the seat cushion by the plane orthogonal to the front-rear direction. It is sectional drawing which shows the seat cushion which concerns on 2nd Embodiment. It is sectional drawing which shows the embodiment which changed a part of the seat cushion of 2nd Embodiment.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, front-back, left-right, and up-down are based on front-back, left-right, and up-down as seen from the person sitting on the seat.
As shown in FIG. 1, the seat of the present embodiment is configured as a vehicle seat S mounted on an automobile, and includes a seat cushion S1, a seat back S2, and a headrest S3.

The seat cushion S1 is configured by covering a cushion frame F1 (see FIG. 2) as an example of a seat frame with a cushion pad 30 as an example of a pad and a skin material 40. The seat back S2 is configured by covering the back frame F2 (see FIG. 2) with a pad and a skin material. Although not shown, the headrest S3 is also configured by covering the headrest frame with a pad and a skin material.

As shown in FIG. 2, the cushion frame F1 is installed on the floor of an automobile via a slide rail SL, whereby the front-rear position of the vehicle seat S can be adjusted. Further, the lower portion of the back frame F2 is rotatably connected to the rear portion of the cushion frame F1 via a reclining mechanism RL.

The back frame F2 is mainly composed of an upper frame 21, left and right seat back side frames 22, and a lower frame 23, and the upper frame 21, left and right seat back side frames 22 and lower frame 23 are welded or the like. It is formed in a frame shape integrally connected by.

The upper frame 21 is made of a pipe material that bends in a substantially U shape, and a pair of left and right support brackets 21B for attaching the headrest S3 are fixed to the front side of the horizontal pipe portion 21A extending in the left-right direction by welding. There is. Further, the left and right vertical pipe portions 21C extending in the vertical direction of the upper frame 21 are integrated with the plate-shaped left and right side frame main body portions 22A coupled to the lower portions thereof to form the left and right seat back side frames 22. is doing.

The cushion frame F1 is mainly composed of the left and right cushion side frames 11, the pan frame 12, and the rear connecting pipe 13, and the left and right cushion side frames 11, the pan frame 12, and the rear connecting pipe 13 are welded or the like. It is formed in a frame shape integrally connected by. Inside the frame-shaped cushion frame F1, a flexible and deformable S spring 14 that supports the occupant together with the cushion pad 30 (see FIG. 1) extends in the front-rear direction between the pan frame 12 and the rear connecting pipe 13. Has been done. In this embodiment, four S springs 14 are provided side by side in the left-right direction.

As shown in FIG. 3, the cushion pad 30 includes a urethane layer 31 as an example of a first pad layer, a latex layer 32 as an example of a second pad layer, a high hardness slab layer 33, and a soft slab layer 34. have. The urethane layer 31 is made of urethane foam in which polyurethane is foamed, and is in contact with the cushion frame F1.

As shown in FIGS. 3 and 4, the urethane layer 31 includes a base portion 31A having a predetermined thickness supported by the S spring 14 and front / rear / left / right side portions 31B to be integrally formed on the front / rear / left / right sides of the base portion 31A. It has 31E.

The front, rear, left and right side portions 31B to 31E project upward from the base portion 31A. The front and rear side portions 31B and 31C sandwich the base portion 31A, the latex layer 32, and the high hardness slab layer 33 from the front and rear directions. The upper surfaces of the front and rear side portions 31B and 31C are substantially flush with the upper surface of the high hardness slab layer 33.

The left and right side portions 31D and 31E sandwich the base portion 31A, the latex layer 32, the high hardness slab layer 33, and the soft slab layer 34 from the left and right directions. The left and right side portions 31D and 31E project above the soft slab layer 34.

The latex layer 32 is made of a latex foam in which natural rubber is foamed. The latex layer 32 has a plurality of holes 32A penetrating in the vertical direction. The latex layer 32 is laminated on the base portion 31A. The latex layer 32 is more elastic than the urethane layer 31. The hole of the latex layer does not have to be a through hole, and for example, a plurality of bottomed holes may be formed on the upper surface and the lower surface of the latex layer.

The high-hardness slab layer 33 is made of urethane foam that is harder than the urethane foam constituting the urethane layer 31. Specifically, the density of the urethane foam constituting the high hardness slab layer 33 is higher than the density of the urethane foam constituting the urethane layer 31. The high hardness slab layer 33 is laminated on the latex layer 32.

The soft slab layer 34 is made of urethane foam that is softer than the urethane foam constituting the urethane layer 31. Specifically, the density of the urethane foam constituting the soft slab layer 34 is smaller than the density of the urethane foam constituting the urethane layer 31. The soft slab layer 34 is laminated on the front and rear side portions 31B and 31C and the high hardness slab layer 33.

Regarding the relationship between the thickness of the base portion 31A, the latex layer 32, the high hardness slab layer 33 and the soft slab layer 34, the high hardness slab layer 33 is the thinnest, the base portion 31A is thicker than the high hardness slab layer 33, and the base portion 31A. The soft slab layer 34 is thicker than the soft slab layer 34, and the latex layer 32 is thicker than the soft slab layer 34. In the present embodiment, the thickness ratio of the base portion 31A, the latex layer 32, the high hardness slab layer 33, and the soft slab layer 34 is 2: 6: 1: 4.

The skin material 40 has a surface layer 41 made of cloth, leather, or the like, and a back layer 42 made of a sponge-like wading material. The surface layer 41 has a seat surface 41A that supports the occupant. The back layer 42 is in contact with the urethane layer 31 and the soft slab layer 34. The skin material 40 has a plurality of hooks 43 on the peripheral edge.

The skin material 40 is attached to the cushion frame F1 by engaging a plurality of hooks 43 with the cushion frame F1 in a state of being covered with the cushion pad 30. The latex layer 32, the high hardness slab layer 33, and the soft slab layer 34 described above are arranged in this order from the bottom between the seat surface 41A and the base portion 31A of the skin material 40.

Based on the above, the following effects can be obtained in the present embodiment.
Since the latex layer 32 made of latex foam is arranged between the skin material 40 and the urethane layer 31, the cushion pad 30 has a structure in which the amount of deflection under a low load is large and the feeling of bottoming is hard to be felt. be able to. In addition, the elasticity of the latex layer 32 disperses and supports the body pressure, and it is possible to reduce the feeling of bottoming out when sitting (the bottom suddenly feels hard after sinking).

Since the left and right side portions 31D and 31E, which are harder than the latex layer 32, sandwich the layers 32 to 34 from the left and right directions, it is possible to satisfactorily prevent the layers 32 to 34 from shifting to the left and right.

Since the left and right side portions 31D and 31E are integrally formed with the base portion 31A of the urethane layer 31, the structure of the cushion pad 30 is compared with the case where the left and right side portions and the base portion of the urethane layer are separate members, for example. Can be simplified.

[Second Embodiment]
Next, the second embodiment of the present invention will be described in detail with reference to the drawings as appropriate. Since this embodiment is a modification of the structure of a part of the cushion pad 30 according to the first embodiment described above, the same components as those of the first embodiment are designated by the same reference numerals. , The explanation will be omitted.

As shown in FIG. 5, the cushion pad 130 according to the second embodiment has layers 31 to 34 substantially the same as those of the first embodiment, and also includes a resin spring layer 35 as an example of the third pad layer. It further has a profile layer 36 as an example of the fourth pad layer and a memory foam slab layer 37.

The resin spring layer 35, the profile layer 36, and the low-resilience slab layer 37 are arranged between the high-hardness slab layer 33 and the soft slab layer 34. Specifically, each layer is arranged in the order of the base portion 31A of the urethane layer 31, the latex layer 32, the high hardness slab layer 33, the resin spring layer 35, the profile layer 36, the low resilience slab layer 37, and the soft slab layer 34 from the bottom. 31 to 37 are arranged.

That is, the resin spring layer 35 is arranged between the latex layer 32 and the seat surface 41A of the skin material 40. The high hardness slab layer 33 is arranged between the latex layer 32 and the resin spring layer 35. The profile layer 36 is arranged between the resin spring layer 35 and the seat surface 41A of the skin material 40. The soft slab layer 34 is arranged between the profile layer 36 and the seat surface 41A of the skin material 40. The memory foam slab layer 37 is arranged between the profile layer 36 and the soft slab layer 34.

The resin spring layer 35 is made of a net-like resin structure in which synthetic resin fibers are intricately entwined in a three-dimensional manner. The resin spring layer 35 has a larger elastic force than the urethane layer 31. The resin spring layer 35 is laminated on the high hardness slab layer 33.

The profile layer 36 is made of profile urethane. Profile urethane is a urethane foam having a corrugated surface composed of a plurality of convex portions 36A. The plurality of convex portions 36A project toward the occupant. The profile layer 36 is laminated on the resin spring layer 35.

The latex layer 32, the high hardness slab layer 33, the resin spring layer 35, and the profile layer 36 are sandwiched from the front-rear direction by the front-rear side portions 31B and 31C.

The low-resilience slab layer 37 is a urethane foam having a lower repulsive force than the urethane foam constituting the urethane layer 31. Specifically, the density of the urethane foam constituting the low-resilience slab layer 37 is smaller than the density of the urethane foam constituting the urethane layer 31, and is higher than the density of the urethane foam constituting the soft slab layer 34. That is, the relationship of the density of the urethane foam is as follows: soft slab layer 34 <low repulsion slab layer 37 <urethane layer 31 <high hardness slab layer 33.

The memory foam slab layer 37 is laminated on the front and rear side portions 31B and 31C and the profile layer 36. A soft slab layer 34 is laminated on the low-resilience slab layer 37.

Regarding the relationship of the thickness of each layer 31 (31A) to 37, the soft slab layer 34, the low-resilience slab layer 37 and the high-hardness slab layer 33 are the thinnest, and the base portion 31A and the resin spring layer 35 are more than the high-hardness slab layer 33. The profile layer 36 is thicker than the resin spring layer 35, and the latex layer 32 is thicker than the profile layer 36. In this embodiment, the thickness ratio of the base portion 31A, the latex layer 32, the high hardness slab layer 33, the resin spring layer 35, the profile layer 36, the low resilience slab layer 37, and the soft slab layer 34 is 2: 6: 1. : 2: 3.5: 1: 1.

As described above, according to the second embodiment, in addition to exhibiting the same effect as that of the first embodiment, the body pressure dispersibility can be improved by having the profile layer 36. Further, by having the resin spring layer 35, the cushion pad 130 can have an appropriate repulsive force.

The present invention is not limited to each of the above embodiments, and can be used in various forms as illustrated below. In the following description, members having substantially the same structure as each of the above embodiments are designated by the same reference numerals, and the description thereof will be omitted.

The positional relationship between the latex layer 32, the resin spring layer 35, and the profile layer 36 is not limited to the second embodiment and can be set arbitrarily. Further, the cushion pad may have at least one of a latex layer 32, a resin spring layer 35, and a profile layer 36.

For example, like the cushion pad 230 shown in FIG. 6, the latex layer 32, the resin spring layer 35, and the profile layer 36 may have the resin spring layer 35 and the profile layer 36, and may not have the latex layer 32. .. Specifically, in the cushion pad 230 shown in FIG. 6, the base portion 31A is formed so as to fill the region where the latex layer 32 of the cushion pad 130 shown in FIG. 5 is arranged. In this embodiment, the resin spring layer 35 corresponds to the second pad layer, and the profile layer 36 corresponds to the third pad layer. In the form shown in FIG. 6, by exchanging the positions of the resin spring layer 35 and the profile layer 36, the second pad layer may be the profile layer 36 and the third pad layer may be the resin spring layer 35.

In each of the above embodiments, the S spring 14 is exemplified as a member that supports the cushion pad, but the present invention is not limited to this, and the cushion pad may be supported by, for example, a wire frame.

In each of the above embodiments, the cushion frame F1 has been exemplified as an example of the seat frame, but the present invention is not limited to this, and the seat frame may be, for example, the back frame F2.

In each of the above-described embodiments, the vehicle seat S mounted on an automobile is exemplified as a seat, but the present invention is not limited to this, and the seat is not limited to this, and is a vehicle seat mounted on a vehicle other than an automobile, for example, a railroad vehicle, a ship, or an aircraft. There may be. Further, the seat is not limited to a seat for vehicles, and may be a seat used at home, for example.

Each element described in the above-described embodiment and modification may be arbitrarily combined and carried out.

30 Cushion pad 31 Urethane layer 32 Latex layer 40 Skin material F1 Cushion frame S Vehicle seat

Claims (10)

A sheet comprising a seat frame, a pad to be covered on the seat frame, and a skin material to be covered on the pad.
The pad is
The first pad layer made of urethane foam and
It has a second pad layer arranged between the first pad layer and the skin material, and has.
The second pad layer is a sheet made of profile urethane, a reticulated resin structure or latex foam. The pad has a third pad layer disposed between the second pad layer and the skin material.
The second pad layer is made of latex foam and is made of latex foam.
The sheet according to claim 1, wherein the third pad layer is made of a profile urethane or a reticulated resin structure. The pad has a fourth pad layer disposed between the third pad layer and the skin material.
The third pad layer is made of a reticulated resin structure.
The sheet according to claim 2, wherein the fourth pad layer is made of profile urethane. The sheet according to claim 3, wherein the pad has a high hardness slab layer which is arranged between the second pad layer and the third pad layer and is harder than the urethane foam. The sheet according to claim 4, wherein the pad has a soft slab layer softer than the urethane foam, which is arranged between the fourth pad layer and the skin material. The sheet according to claim 5, wherein the pad has a low-resilience slab layer having a repulsive force lower than that of the urethane foam, which is arranged between the fourth pad layer and the soft slab layer. The sheet according to any one of claims 1 to 6, wherein the S spring is spanned over the seat frame and includes an S spring that supports the first pad layer. The pad has a third pad layer disposed between the second pad layer and the skin material.
The second pad layer is made of a reticulated resin structure.
The sheet according to claim 1, wherein the third pad layer is made of profile urethane. The pad is
The aspect according to any one of claims 1 to 8, wherein the left and right side portions sandwiching the second pad layer from the left-right direction and having a side portion harder than the second pad layer. Sheet. The sheet according to claim 9, wherein the left and right side portions and the first pad layer are integrally formed.

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