TH38808B - upholstery body parts, seats and methods of manufacture thereof - Google Patents

Abstract

DC60 to provide a seat body section, which can ensure both a soft touch feeling and durability. And methods of manufacturing them The fuselage section 11 is formed by overlaying a low fiber density 4a sheet-like structure in which fiber 2 is superimposed until their stand-out direction. Corresponding to the direction according to the thickness T of the fuselage section, the cushion and the 4b-sheet-like fibrous structure, with the high density of the bend degree, the load in the direction along the thickness T is smaller than that of the structure that It is a 4a sheet-like fiber with low density. The low density 4a sheet-like fibrous structure was positioned closer to the seat surface 10a than the high-density 4a sheet-like fibrous structure. Low density on the side of The seat surface 10a will support the load from the outside of the seat body section 11 due to the sitting and will bend strongly, it will provide a soft touch feeling to the seat occupant. On the other hand, due to the 4b sheet-like fibrous structure, the high density will be smaller in bending volume and it will Solid to some size It will harden to the fatigue in the load direction. Until the durability can be ensured to provide the seat body parts, which can ensure both a soft touch feeling and durability. And methods of manufacturing them The fuselage section 11 is formed by overlaying a low fiber density 4a sheet structure where fiber 2 is overlaid until their stand-out direction. Corresponding to the direction according to the thickness T of the fuselage section, the cushion and the 4b sheet-like fibrous structure, with a high density of bend degrees to the load in the direction along the thickness T is smaller than that of the structure at It is a 4a sheet-like fiber with low density. The low density 4a sheet-like fibrous structure was positioned closer to the seat surface 10a than the high-density 4a sheet-like fibrous structure. Low density on the side of The seat surface 10a will support the load from the outside of the seat body section 11 due to the sitting and will bend strongly, it will provide a soft touch feeling to the occupant. On the other hand, due to the 4b sheet-like fibrous structure, the high density will be smaller in bending volume and it will Solid to some size It will harden to the fatigue in the load direction. Until durability can be ensured

Claims (10)

1. The cushion body is formed by the molding of a fibrous structure obtained by mixing the staple and binder fibers using a mold with cavities of a predetermined shape, in which the cushion body is formed by the overlapping of a certain number of fibrous structures. The number of overlapping fibrous structures shall include the first fibrous structure and a second fibrous structure (4b) which, in degree of flexion against load in the thickness direction, is smaller than the first fibrous structure. The first fibrous structure (4a) is placed close to the surface receiving (10a) of the cushion body (11, 21) on which the external load is applied more than the second fibrous structure (4b), where the first fibrous structure (4a) is formed from the proximity of similar fibrous material to the second fibrous structure (4b) and is formed to have a lower fiber density than that of the second fibrous structure (4b), where the first fibrous structure (4a) has a fiber density of 10 to 25 kg/m3 and the second fibrous structure (4b) has a fiber density of 20 to 35 kg/m3. 2. The body of the cushion (11,21) under claim 1, where the first fibrous structure (4a) and the second fibrous structure (4b) shall be used in different patterns or colors as deemed to be based on their appearance so that the two fibrous structures can be distinguished from one another. 3. The body sections (11,12) under claim 1, where the cushion body sections (11,12) are formed by blowing steam onto a linear structure through steam holes (43) formed on the mold surface of the mold (40) under pressure higher than atmospheric pressure. 4. The cushion body (11,12) under claim 3, where the air pressure is the saturated water vapor pressure at a temperature at which the bonding fibers are higher and lower than the melting point of the staple fibers. 5. The cushion body (11,12) under claim 1, where steam holes (43) are formed more than in the area corresponding to the unloaded surface side (10b), where the second fibrous structure (4b) is arranged more than in the area corresponding to the loaded surface (10a) in mold (40), and steam is blown onto the fibrous structure throughout the steam holes (43) on the unloaded surface side (10b). 6. Seat (1) which includes the seat body (11,12) and the seat frame (15,25) that supports the seat body (11,12), in which the seat body (11,12) is one of the seat body parts according to any of Claims 1 through 5. 7. Method of fabricating the cushion body (11,12) which consists of fibrous structures, comprising at least the fibrous structure formation step of continuous folding of the main and bonding fibers for each predetermined length to form the fibrous structure under the superposition condition; the fibrous structure placement step in which the first (4a) and second (4b) fibrous structures are incorporated into the fibrous structure closer to the load-bearing surface (10a) of the cushion body (11,21) than the second (4b) fibrous structure; and the placement of the first and second (4a,4b) fibrous structures in a mold (40) with a cavity (40a) according to the predetermined shape under the superposition and compression conditions of the fibrous structure. The first and second fibrous structures (4a,4b) are formed from the proximity of similar fibrous material to the second fibrous structure (4b) and are formed to have the same fiber density as the second fibrous structure (4b), where the first fibrous structure (4a) has a fiber density of 10 to 20 kg/m³ and the second fibrous structure (4b) has a fiber density of 20 to 35 kg/m³. The casting process of the fibrous structure is performed by heating the structure in a mold (40) to form the cushion body (11,12), where in the casting process steam is blown onto the fibrous structure through steam holes (43) formed on the mold surface of the mold (40) under air pressure higher than atmospheric pressure. 8. Method of fabrication of the cushion body (11,21) in accordance with claim 7, where the air pressure is the pressure of saturated steam at the melting point of the bond fibers or above and below the melting point of the staple fibers. 9. Method of fabrication of the cushion body (11,12) in accordance with claim 7, in which steam holes (43) are formed more than in the corresponding areas on the side of the unloaded surface (10b), in which a second fibrous structure (4b) is placed more than in the corresponding areas on the loaded surface (10a) in the mold (40), and steam is blown onto the fibrous structure through the steam holes (43) on the side of the unloaded surface (10b) during the molding process. 10. The method of manufacture of the seat (1) consisting of the seat body sections (11,12) and the seat frame (15,25) supporting the seat body sections (11,12) which includes at least the steps of forming the seat body sections (11,12) according to the method of manufacture of the seat body sections (11,12) according to claims 7 to 9 and the steps of attaching the seat body sections (11,21) to the seat frame (15,25).