JP2538149B2 - Seat pad structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat pad structure.

[0002]

2. Description of the Related Art A seat used in a vehicle or a building includes a seat cushion portion for sitting down and a seat back portion as a backrest, and an inner seat pad is covered with a seat cover on the front side. Structure.

The seat pad is of a type in which a large number of pieces of feather are sprayed with an adhesive paste and laminated in a block shape (Japanese Utility Model Publication No. 38-27880), or a seat portion with which a human body comes into contact is relatively large. There is known a layered hard structure type in which pads having different hardnesses are joined via an impregnation layer in order to make the other side portions hard and soft.

[0004]

However, in the former pad using feathers, although the hygroscopicity and feel characteristics of the feathers can be expected, the feather block alone has a problem in maintaining the shape of the pad. . Further, in the latter layered pad having a different hardness structure, since a harder impregnated layer is formed between layers, there is a problem that a bottoming feeling is generated between the upper layer portion and the lower layer portion.

The present invention has been made by paying attention to such a conventional technique, and intends to provide a structure of a seat pad which has good shape retention and does not have a feeling of bottoming while making the best use of the characteristics of feathers. It is a thing.

[0006]

In the structure of the seat pad according to the present invention, in order to achieve the above object, the seat portion is formed of a feather molding material and the other side portions are formed of a urethane foam material. It was done.

[0007]

[Function] Since the seat is made of a feather molding material,
It excels in various properties such as hygroscopicity, water vaporization, touch and restoration. Further, since the side portions other than the seat portion are formed of the urethane foam material, the shape when the outer skin is stuck is good, and the finish and the holding property are good. Further, the urethane foam material and the feather molding material have few impregnated parts and do not have a feeling of bottoming.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of the present invention. FIG. 2 shows a seat 1 of an automobile, which includes a seat cushion 2 and a seat back 3. And the seat cushion 2 and the seat back 3
Has a structure in which the inner seat pad 4 is covered with an outer skin (seat cover) 5.

FIG. 1 shows the structure of the seat pad 4 on the side of the seat cushion 2. That is, the seat pad 4 according to this embodiment includes a seat portion 6 on which a person is seated, and a side portion 7 that holds so as to surround the bottom surface 6a and the side surface 6b of the seat portion 6. The seat portion 6 is formed of a feather molding material obtained by molding 90% down and 10% feather with a urethane elastomer binder, and the side portion 7 is formed of expanded polyurethane foam (urethane foam material). . The feather molding material and the foamed polyurethane foam are integrated via the impregnating portion 8.

As described above, since the seat portion 6 which comes into contact with the human body is made of the feather molding material and the other side portions 7 are made of the foamed polyurethane foam, the shape of the seat pad 4 is surely maintained and the seat 1 is finished. Good and good hold.

Further, since the feather molding material and the foamed polyurethane foam are integrated, the seat pad 4 has a kind of laminated composite structure, and vibration absorption and sitting comfort can be improved.

Furthermore, since the feather molding material is used for the seat portion 6, various characteristics of the seat pad 4 are improved. Below, changing the ratio of down D and feather F of the feather molding material,
The result of each performance test compared with slab urethane is shown.

The results of each performance test comparing the slab urethane with the down D and feather F ratios of the feathers are shown below.

Moisture absorption test: 100 × 100 × 20 (mm)
Was left in an atmosphere at a temperature of 50 ° C. and a humidity of 90%, and the moisture absorption was determined from the weight change of the sample. The moisture absorption rate (%) was calculated by the following formula. In addition, S means a sample. Moisture absorption (%) = [(S weight after elapse of moisture absorption test time) g-
(Blank S weight) g] ÷ [(Blank S weight) g] ×
100 As shown in the table below, the feather mold material exhibited a higher hygroscopicity than the slab urethane. Therefore, the seat portion (feather molding material) 6 immediately absorbs moisture such as sweat, which is comfortable without causing stuffiness.

[0015]

[Table 1]

Moisture evaporation test: 100 × 100 × 20 (m
The sample of m) is immersed in water, air in the sample is removed, and the sample is left in water for 2 hours. Then take out 2k
Press twice with g roller. Thereafter, the sample was put in an oven at 50 ° C., and the weight after the passage of time was measured to determine the water removal rate. The water removal rate (%) was determined by the following equation. In addition, S means a sample. Moisture removal rate (%) = [(hydrated S-blank S) g- (S-blank S) g after lapse of time] ÷ [(hydrated S-blank S) g] × 100 The results are as shown in the table below. The mold material showed higher water evaporation than the slab urethane. Therefore, even if the seat portion (feather molding material) 6 absorbs moisture such as sweat, it immediately evaporates it, which is comfortable without causing stuffiness.

[0017]

[Table 2]

Thermal storage test: 100 × 100 × 20 (m
In m), a sample having a basis weight of 700 g / m ² was left in an atmosphere at 100 ° C. for 2 hours, taken out, and the temperature of the central portion and the outer wall portion was measured at room temperature. As shown in the table below, the feather mold material showed higher heat storage than the slab urethane. Therefore, the seat portion (feather molding material) 6 has good heat retention and is comfortable.

[0019]

[Table 3]

Deflection test under load: FIG. 3 is a diagram showing a deflection curve under load when a load of 70 kg was applied to an integrated product of a feather molding material and polyurethane foam and a slab urethane as a comparative example. As a result, as shown in FIG. 3, the feather molding material + foamed polyurethane foam has a better load deflection property than the slab urethane, so that the feel is soft and comfortable.

Further, in the case of the integral product of the feather molding material and the foamed polyurethane foam, since one of them is the feather molding material, the impregnating portion 8 for integrating the two is thick and hard like conventional slab urethanes. It does not become a thing, but becomes thin and soft. Therefore, when the user sits down, the feeling of bottoming is eliminated, and the sitting comfort is further enhanced.

Restorability test: A 50 × 50 × 20 (mm) sample was compressed by 50% and then in a dry atmosphere (DRY) at a temperature of 70 ° C. and in a humid atmosphere (WET) at a temperature of 50 ° C. and a humidity of 95%. Then, each sample was allowed to stand for 22 hours and the compression set of the sample was measured. As a result, as shown in the table below, the feather mold material generally showed better resilience than the slab urethane.

[0023]

[Table 4]

As described above, the feather molding material of this embodiment is excellent in hygroscopicity, water vaporization, heat storage, deflection characteristics under load (feeling), and restoring ability. The performance of the seat pad 4 itself used as 6 is also improved.

Further, since the down mold material and the feather F are made by binding urethane D with the urethane elastomer, the rigidity is improved and the seat pad 4 is finished neatly. Furthermore, it is easy to handle, and there is no scattering of the blades, and workability and workability are good.

FIG. 4 is a diagram showing a second embodiment of the present invention. In the following description, the same material parts as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted. In the seat pad 9 according to this embodiment, the slit S is provided between the side surface 6b of the seat portion 6 and the side portion 7. In addition, the pulling portion 5a on the skin 5
Was formed, and the pulling portion 5a was hooked on the wire 10 provided at the bottom of the slit S.

As described above, since the slit S is provided in the side portion 7 of the seat portion 6, the softness of the feather molding material can be further increased. Further, air when sitting on the seat portion 6 easily escapes from the slit S, damping is eliminated, and sitting comfort is improved. Furthermore, since the pulling portion 5a of the skin 5 is pulled into the slit S, the degree of freedom in design is increased.

FIG. 5 is a diagram showing a third embodiment of the present invention. In the following description, the same parts as those of the first and second embodiments are designated by the same reference numerals, and the duplicated description will be omitted. In the seat pad 9 according to this embodiment, the foamed slab urethane 12 is provided on the bottom surface 6a and the side portion 7 of the seat portion 6. Therefore,
The seat pad 9 has a three-layer structure, which improves the sitting comfort. Further, the air bubbles in the side portion (polyurethane foam) 7 enter the slab urethane 12 to form the elastic impregnated portion 13. Therefore, the impregnated portion 13 becomes a kind of spring body, and the cushioning property of the seat portion 6 is enhanced. The slab urethane 12 and the seat portion 6 are fixed by the binder of the feather molding material forming the seat portion 6.

In the above description, the seat pad of the seat cushion is described as an example, but the present invention is not limited to this.
It goes without saying that the present invention is also applied to a seat pad of a seat back.

[0030]

The structure of the seat pad according to the present invention is as described above, in which the seat portion is made of a feather molding material and the side portions other than the seat portion are made of urethane foam material. Therefore, the shape retainability when the skin is stuck is good, and the finish and hold are also good.

Further, since the urethane foam material and the feather molding material have few impregnated portions and do not have a feeling of bottoming, the sitting comfort is improved.

Further, since the seat portion is made of the feather molding material, it is excellent in various properties such as hygroscopicity, water vaporization, touch and restoration.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line SA-SA in FIG. 2 showing the structure of a seat pad according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a seat.

FIG. 3 is a graph showing a load deflection curve.

FIG. 4 is a sectional view showing a structure of a seat pad according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a structure of a seat pad according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Seat 4, 9, 11 Seat Pad 5 Skin 6 Seat 6a Bottom 6b Side 7 Side S Slit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-253011 (JP, A) JP-A-61-213087 (JP, A) Actual Kaihei 1-104247 (JP, U) Actual Kaihei 2- 101727 (JP, U)

Claims (6)

(57) [Claims] 1. A structure of a seat pad, characterized in that the seat portion is made of a feather molding material and the other side portions are made of urethane foam material. 2. The structure of the seat pad according to claim 1, wherein the feather molding material and the urethane foam material are integrated. 3. The structure of the seat pad according to claim 1, wherein a bottom surface of the feather molding material is bonded to the urethane foam material, and side surfaces of the feather molding material are not bonded to each other through the slit portion. 4. The structure of the seat pad according to claim 2 or 3, wherein the bottom surface of the feather molding material and the urethane foam material are joined together via a foam slab urethane. 5. The structure of the seat pad according to claim 1, wherein the down-molding material is molded by mixing down and feather. 6. The structure of the seat pad according to claim 1, wherein the molding material of the feather portion is formed by molding down and feather with a urethane elastomer binder.