Claims
- 1. In a loop pin assembly in which a plurality of loop pins, each comprising a flexible filament, an insertion head portion provided on one end portion of said filament and having an appropriate mating part and a socket portion provided on the other end of said filament and having a hole for irreversibly passing said insertion head therethrough, said filament, said insertion head portion and said socket portion being integrally formed into one body, are arranged in parallel with each other through connecting bars to which a part of each of said loop pins is detachably connected thereto, said loop pin being configured so that said insertion head portion and said socket portion are capable of being connected to each other between said mating part formed on an edge portion of said insertion head portion and provided in a vicinity of a connecting portion formed between said insertion head portion and said filament, and a step-like portion provided within said through hole formed within said socket portion, and further wherein said loop pin is made of polypropylene and a pitch formed along the plurality of said loop pins parallely arranged to each other is set at less than 3.5 mm, preferably less than 3.1 mm, a break strength of said connected portion when said insertion head portion and said socket portion are mated to each other, being at least 5.0 kg.
- 2. A loop pin according to claim 1, wherein two flat surfaces parallely arranged to each other are formed on a part of said insertion head portion along the axial direction.
- 3. A loop pin according to claim 1, wherein said loop pin is provided with a small-diameter member on a portion adjacent to said insertion head portion having a uniform diameter.
- 4. A loop pin according to claim 1, wherein said filament has an elliptical cross-section shape with a minor axis diameter thereof being in a range of 0.45 to 1.3 mm.
- 5. A loop pin according to claim 1, wherein a pair of locking blades are formed on an inside side surface of said through hole provided in said socket portion, and further wherein a thickness of a base part of said locking blades is thicker than the radius of said filament.
- 6. A loop pin according to claim 5, wherein corners of an inside surface formed in said through hole in which said locking blades are housed are configured with curved surfaces.
- 7. A loop pin according to claim 5, wherein said pair of locking blades housed in said socket portion are disposed along a longitudinal direction of said filament.
- 8. A loop pin according to claim 1, wherein said through hole has a rectangular configuration having a long side, a direction of which coincides with a longitudinal direction of said filament.
- 9. A loop pin according to claim 1, wherein a part of the outer diameter dimension of said insertion head portion is substantially identical to a diameter of said through hole of said socket portion for irreversibly passing said insertion head portion.
- 10. A loop pin according to claim 1, said loop pin further comprising a rotation-stopping protrusion at a connection portion between said insertion head portion and said filament for engaging with said socket portion.
- 11. A loop pin according to claim 1, said loop pin further comprising a rotation-stopping protrusion at a small-diameter part of said insertion head portion for engaging with said socket portion.
- 12. A loop pin according to claim 1, wherein a thickness of said first surface of said socket portion is thicker than a diameter of said filament.
- 13. A loop pin according to claim 1, wherein a configuration of a tip end portion of said pair of blades which contact with said mating part of said insertion head is curved shape.
- 14. A loop pin according to claim 1, wherein at least one of said insertion head inserting hole or said cavity has a configuration being longer in the lateral direction coinciding with the direction of the center axis of said filament.
- 15. A loop pin according to claim 1, wherein two flat surfaces arranged parallel to each other, are formed on parts being oppositely arranged on said insertion head portion along the axial direction of said filament.
- 16. A loop pin comprising a flexible filament, an insertion head portion provided on one end portion of said filament and having an appropriate mating part and a socket portion provided on the other end of said filament and having a hole for irreversibly passing said insertion head therethrough, said filament, said insertion head portion and said socket portion being integrally formed into one body, said loop pin being configured so that said insertion head portion and said socket portion are capable of being connected to each other between said mating part formed on an edge portion of said insertion head portion and provided in a vicinity of a connection portion formed between said insertion head portion and said filament and a step-like portion provided within said through hole formed within said socket portion, and further wherein said loop pin is made of polypropylene and a break strength of said connected portion when said insertion head portion and said socket portion are mated to each other is at least 5.0 kg.
- 17. A loop pin comprises a filament, an insertion head provided on one end portion of said filament and having an appropriate mating part and a socket portion provided on the other end of said filament and having a hole provided with locking blades therein for irreversibly passing said insertion head; said filament, said insertion head and said socket portion being integrally formed into one body, wherein said insertion head includes at least a head portion and a connecting member having a diameter smaller than that of said head portion so that said appropriate mating part can be formed by a step-like portion formed at the connection portion between said head portion and said connecting member, while said socket portion has a first surface and a second surface each being formed in parallel with a center axis of said filament to each other, said hole being provided inside said socket portion penetrating through said first and said second surfaces, a center axis of said hole being perpendicular to said center axis of said filament, said first surface of said socket portion having an insertion head inserting hole portion having a cross-sectional are being substantially identical to or greater than a maximum cross-sectional area of said head portion of said insertion head, and said second surface portion thereof having a cavity holding said head portion of said insertion head therein, a cross-sectional area thereof being larger than that of said insertion head inserting hole portion, and further wherein, a pair of said locking blades are formed on the inside surface of said cavity and are oppositely arranged with each other along a direction of said center axis of said filament, a base portion of each one of said blades being connected to a back surface of said first surface of said socket portion and extending into said cavity inwardly to each other so as to gradually narrow a gap formed therebetween.
Parent Case Info
This is a continuation-in-part, of application Ser. No. 09/479,322, filed Jan. 6, 2000.
US Referenced Citations (17)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2517003 |
Nov 1975 |
DE |
2103274 |
Feb 1983 |
GB |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09/479322 |
Jan 2000 |
US |
Child |
09/667634 |
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US |