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SCREW HAVING MULTIPLE-THREAD NECK LOWER SCREW PART
To improve bolts in conventional art, especially enhance safety in use, and increase holding force in an installed state.SOLUTION: A bolt (10) comprises a head part (11) with an action part for tool, a shaft part (18) with at least one first screw portion (13) and second screw portion (15), and a tip part (16). The first screw portion (13) is a neck lower screw part continuing to a neck portion (12) having no thread. The neck lower screw part (13) is designed as a screw with at least two threads. It is necessary that a pitch of the first screw portion (13) is longer than a pitch of a second screw portion (15), and an axial path difference over the whole screw length of the first screw portion is 3.5 mm at a maximum.SELECTED DRAWING: Figure 5
【課題】従来技術のボルトを改善する、特に取扱いの安全性を高め、設置された状態での保持力を増加させる。【解決手段】ボルト（１０）は、工具用の作用部を有する頭部（１１）と、少なくとも１つの第１のネジ部分（１３）と第２のネジ部分（１５）を有する軸部（１８）と、先端部（１６）とをする。第１のネジ部分（１３）は、ネジのない首下部分（１２）に続く首下ネジ部である。この首下ネジ部（１３）は、少なくとも二条のネジとして設計されており、第１のネジ部分（１３）のピッチは、第２のネジ部分（１５）のピッチよりも大きく、第１のネジ部分の全ネジ長さにわたる軸方向の路程差は最大３．５ｍｍである必要がある。【選択図】図５
SCREW HAVING MULTIPLE-THREAD NECK LOWER SCREW PART
To improve bolts in conventional art, especially enhance safety in use, and increase holding force in an installed state.SOLUTION: A bolt (10) comprises a head part (11) with an action part for tool, a shaft part (18) with at least one first screw portion (13) and second screw portion (15), and a tip part (16). The first screw portion (13) is a neck lower screw part continuing to a neck portion (12) having no thread. The neck lower screw part (13) is designed as a screw with at least two threads. It is necessary that a pitch of the first screw portion (13) is longer than a pitch of a second screw portion (15), and an axial path difference over the whole screw length of the first screw portion is 3.5 mm at a maximum.SELECTED DRAWING: Figure 5
【課題】従来技術のボルトを改善する、特に取扱いの安全性を高め、設置された状態での保持力を増加させる。【解決手段】ボルト（１０）は、工具用の作用部を有する頭部（１１）と、少なくとも１つの第１のネジ部分（１３）と第２のネジ部分（１５）を有する軸部（１８）と、先端部（１６）とをする。第１のネジ部分（１３）は、ネジのない首下部分（１２）に続く首下ネジ部である。この首下ネジ部（１３）は、少なくとも二条のネジとして設計されており、第１のネジ部分（１３）のピッチは、第２のネジ部分（１５）のピッチよりも大きく、第１のネジ部分の全ネジ長さにわたる軸方向の路程差は最大３．５ｍｍである必要がある。【選択図】図５
SCREW HAVING MULTIPLE-THREAD NECK LOWER SCREW PART
多条の首下ネジ部を有するネジ
YVES HOERLER (author) / RENE KELLER (author) / STEFAN KOCH (author)
2019-01-10
Patent
Electronic Resource
Japanese
IPC:
F16B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES
,
Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile
/
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
| Engineering Index Backfile | 1956