IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0397106
(2009-03-03)
|
등록번호 |
US-8220227
(2012-07-17)
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발명자
/ 주소 |
- Matherly, Walter Scott
- Hara, Tetsuro
|
출원인 / 주소 |
|
대리인 / 주소 |
Westerman, Hattori, Daniels & Adrian, LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
7 |
초록
▼
The present invention provides a method of transporting parts constituting a product in a product assembly plant, the method including placing the parts in a returnable container, the returnable container being carried by a worker within the plant, wherein the returnable container is formed by expan
The present invention provides a method of transporting parts constituting a product in a product assembly plant, the method including placing the parts in a returnable container, the returnable container being carried by a worker within the plant, wherein the returnable container is formed by expansion molding of expanded particles of a polyolefin-based resin, the relationship between the weight and volume of the returnable container satisfies Formula (1) below, and the relationship between the flexural modulus and density of the returnable container satisfies Formula (2) below: 650≦(a−W)/W×V≦4,000 (1) (where W is the weight (kg) of the returnable container, V is the volume (L) of the returnable container, and a represents 23 kg, i.e., the maximum weight that can be carried by a worker within the plant, which is recommended by the National Institute for Occupational Safety & Health (NIOSH)); 0.10≦F/D≦0.60 (2) (where D is the density (g/L) of the returnable container, and F is the flexural modulus (MPa) measured according to ISO 1209).
대표청구항
▼
1. A method of transporting parts constituting a product in a product assembly plant, the method comprising placing the parts in a returnable container, the returnable container being carried by a worker within the plant, wherein the returnable container is formed by expansion molding of expanded pa
1. A method of transporting parts constituting a product in a product assembly plant, the method comprising placing the parts in a returnable container, the returnable container being carried by a worker within the plant, wherein the returnable container is formed by expansion molding of expanded particles of a polyolefin-based resin, the relationship between the weight and volume of the returnable container satisfies Formula (1) below, and the relationship between the flexural modulus and density of the returnable container satisfies Formula (2) below: 650≦(a−W)/W×V≦4,000 (1) (where W is the weight (kg) of the returnable container, V is the volume (L) of the returnable container, and a represents 23 kg, i.e., the maximum weight that can be carried by a worker within the plant, which is recommended by the National Institute for Occupational Safety & Health (NIOSH)); 0.10≦F/D≦0.60 (2) (where D is the density (g/L) of the returnable container, and F is the flexural modulus (MPa) measured according to ISO 1209). 2. The method of transporting parts according to claim 1, wherein the parts are transported within an automobile assembly plant or an electrical appliance assembly plant. 3. The method of transporting parts according to claim 1, wherein the polyolefin-based resin is a polypropylene-based resin. 4. The method of transporting parts according to claim 1, wherein the density D of the returnable container is 35 to 100 g/L. 5. The method of transporting parts according to claim 1, wherein the returnable container has dimensions of 305 to 1,422 mm (12 to 52 inches) in length, 279 to 572 mm (11 to 22 inches) in width, and 101 to 368 mm (4 to 14 inches) in height. 6. The method of transporting parts according to claim 1, wherein the maximum thickness of the returnable container is less than 50 mm. 7. A returnable container for transporting parts constituting a product in a product assembly plant, in which the parts are placed in the returnable container, and the returnable container is carried by a person from one location inside or outside the plant to another location inside the plant, wherein the returnable container is formed by expansion molding of expanded particles of a polyolefin-based resin, the relationship between the weight and volume of the returnable container satisfies Formula (1) below, and the relationship between the flexural modulus and density of the returnable container satisfies Formula (2) below: 650≦(a−W)/W×V≦4,000 (1) (where W is the weight (kg) of the returnable container, V is the volume (L) of the returnable container, and a represents 23 kg, i.e., the maximum weight that can be carried by a worker within the plant, which is recommended by the National Institute for Occupational Safety & Health (NIOSH)); 0.10≦F/D≦0.60 (2) (where D is the density (g/L) of the returnable container, and F is the flexural modulus (MPa) measured according to ISO 1209). 8. The returnable container for transporting parts according to claim 7, wherein a recessed portion serving as a finger insertion portion is provided on an outer surface of a sidewall, and the finger insertion portion and an upper end form a handle structure. 9. The returnable container for transporting parts according to claim 8, wherein the finger insertion portion has a shape in which the upper part of the finger insertion portion is concave with respect to the upper end side. 10. The returnable container for transporting parts according to claim 9, wherein the thickness between the upper surface of the finger insertion portion and the upper end is 30 to 50 mm, and the length from the upper end to the finger insertion portion is 65 to 90 mm. 11. The returnable container for transporting parts according to claim 7, wherein a finger insertion through-hole is provided on a sidewall, and the peripheral surface of the finger insertion through-hole is reinforced with a reinforcing member. 12. The returnable container for transporting parts according to claim 11, wherein the reinforcing member reinforcing the peripheral surface of the finger insertion through-hole is composed of a non-expanded resin or an expanded resin with a density of 120 g/L or more. 13. The returnable container for transporting parts according to claim 11, wherein the upper end of the opening of the finger insertion through-hole is located at a distance of 30 to 50 mm from the upper end of the sidewall, and the lower end of the opening of the finger insertion through-hole is located at a distance of 60 to 80 mm from the upper end of the sidewall.
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