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Machine translation
1. (WO1981002449) NAIL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002449    International Application No.:    PCT/JP1981/000034
Publication Date: 03.09.1981 International Filing Date: 21.02.1981
IPC:
F16B 15/04 (2006.01)
Applicants:
Inventors:
Priority Data:
80/22671 22.02.1980 JP
Title (EN) NAIL
(FR) PITON
Abstract: front page image
(EN)Nail with a strengthened removal preventing force. Most of conventional nails are provided with a removal preventing means such as a spiral groove or annular grooves formed on the end of the shank thereof. When a base material into which the conventional nail is driven is a porous soft substance such as foamed concrete, the removal preventing means of these previous types do not provide a sufficient removal preventing force and little removal preventing effect is expected. This nail includes a pair of shanks (1), (1) longitudinally confronting each other with a bank-like metal plate (2) therebetween, the ends of the shanks (1), (1) being formed with tapered surfaces (5) on the insides Thus, when the nail is driven into a base material (9), the shanks (1), (1) are gradually diverged into the base material (9), while the metal plate (2) is compressed and deformed in a zigzag shape to thereby retain the expanding action of the shanks (1), (1) from the inside and to engage the shanks (1), (1) in the base material (9), thereby preventing the removal of the nail and strengthening the removal preventing force of the nail. Further, the nail also includes a tightening ring (7) disposed around both shanks (1), (1) and the metal plate (2), thereby preventing the shanks (1), (1) from expanding on the surface of the base material (9) and thus aiding the shanks (1), (1) to penetrate deep into the base material (9) as well as preventing the nail hole on the surface of the base material (9) from expanding.
(FR)Piton dont la force de resistance a l"extraction est accrue. La plupart des pitons conventionnels sont pourvus de moyens pour en prevenir l"extraction tels qu"une rainure en spirale ou des rainures annulaires formees a l"extremite de la tige. Lorsque le materiau de base dans lequel le piton conventionnel est enfonce est un materiau poreux mou tel que du beton-mousse, les moyens d"empechement d"extraction de ces pitons conventionnels n"offrent pas une force suffisante d"empechement d"extraction et l"effet de retention obtenu est insuffisant. Ce piton comprend une paire de tiges (1, 1) opposees l"une a l"autre longitudinalement avec une plaque metallique en forme de bande (2) disposee entre elles, les extremites des tiges (1, 1) etant formees avec des surfaces effilees (5) vers l"interieur. Ainsi, lorsque le piton est enfonce dans un materiau de base (9), les tiges (1, 1) divergent progressivement dans le materiau de base (9), tandis que la plaque metallique (2) est comprimee et deformee suivant une forme en zig-zag de maniere a preserver l"action d"expansion des tiges (1, 1) a partir de l"interieur et pour engager les tiges (1, 1) dans le materiau de base (9), empechant ainsi l"extraction du piton et accroissant la force d"empechement d"extraction de celui-ci. En outre, le piton comprend aussi une bague de serrage (7) disposee autour des deux tiges (1, 1) et de la plaque metallique (2), empechant ainsi les tiges (1, 1) de s"etendre sur la surface du materiau de base (9) et aidant les tiges (1, 1) a penetrer profondement dans le materiau de base (9) tout en empechant le trou du piton a la surface du materiau de base (9) de s"agrandir.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)