A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SCREW
To provide a screw suitable for a covering method for suppressing the occurrence of come-out that a bit comes off from the screw even if a rotational load is high.SOLUTION: A screw 1A comprises a head part 3 at which a recess 2A fit with a driver bit is formed, and a shaft part 4 at which a screw thread 40 is formed. The recess 2A has six pieces of apexes 20A in a peripheral direction of the head part, the apexes 20A are constituted of curve lines which become protrusive toward an external periphery of the head part 3, and a clearance between the apexes 20A is constituted of a curve line which becomes protrusive toward a center of the head part 3, and has an inside face 21A which is parallel to an axial direction of the shaft part 4. In the screw 1A, a thickness of the head part 3 is 1.2 mm or thicker and 2.4 mm or thinner, a depth of the recess 2A is 1.6 mm or deeper, and a wall thickness of a periphery of the recess 2A is 0.7 mm or thicker.SELECTED DRAWING: Figure 1B
【課題】回転負荷が高くても、ビットがネジから外れるカムアウトの発生が抑制されるカバー工法に適したネジを提供する。【解決手段】ネジ１Ａは、ドライバビットが嵌合するリセス２Ａが形成される頭部３と、ネジ山４０が形成される軸部４を備え、リセス２Ａは、頭部の周方向に沿って６個の頂部２０Ａを有し、各頂部２０Ａは、頭部３の外周に向かって凸状となる曲線で構成され、各頂部２０Ａの間が、頭部３の中心に向かって凹状となる曲線で構成され、かつ、軸部４の軸方向に平行な内側面２１Ａを有する。ネジ１Ａは、頭部３の厚さが１．２ｍｍ以上２．４ｍｍ以下、リセス２Ａの深さが１．６ｍｍ以上、リセス２Ａの周囲の肉厚が０．７ｍｍ以上である。【選択図】図１Ｂ
SCREW
To provide a screw suitable for a covering method for suppressing the occurrence of come-out that a bit comes off from the screw even if a rotational load is high.SOLUTION: A screw 1A comprises a head part 3 at which a recess 2A fit with a driver bit is formed, and a shaft part 4 at which a screw thread 40 is formed. The recess 2A has six pieces of apexes 20A in a peripheral direction of the head part, the apexes 20A are constituted of curve lines which become protrusive toward an external periphery of the head part 3, and a clearance between the apexes 20A is constituted of a curve line which becomes protrusive toward a center of the head part 3, and has an inside face 21A which is parallel to an axial direction of the shaft part 4. In the screw 1A, a thickness of the head part 3 is 1.2 mm or thicker and 2.4 mm or thinner, a depth of the recess 2A is 1.6 mm or deeper, and a wall thickness of a periphery of the recess 2A is 0.7 mm or thicker.SELECTED DRAWING: Figure 1B
【課題】回転負荷が高くても、ビットがネジから外れるカムアウトの発生が抑制されるカバー工法に適したネジを提供する。【解決手段】ネジ１Ａは、ドライバビットが嵌合するリセス２Ａが形成される頭部３と、ネジ山４０が形成される軸部４を備え、リセス２Ａは、頭部の周方向に沿って６個の頂部２０Ａを有し、各頂部２０Ａは、頭部３の外周に向かって凸状となる曲線で構成され、各頂部２０Ａの間が、頭部３の中心に向かって凹状となる曲線で構成され、かつ、軸部４の軸方向に平行な内側面２１Ａを有する。ネジ１Ａは、頭部３の厚さが１．２ｍｍ以上２．４ｍｍ以下、リセス２Ａの深さが１．６ｍｍ以上、リセス２Ａの周囲の肉厚が０．７ｍｍ以上である。【選択図】図１Ｂ
SCREW
ネジ
HAYASHI SUSUMU (author) / KUBO KOJI (author) / ARAI TOSHIMICHI (author)
2022-09-05
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
/
E04D
ROOF COVERINGS
,
Dacheindeckungen
SCREW-TIGHTENED LOCK, MALE SCREW MEMBER, FEMALE SCREW MEMBER
| European Patent Office | 2017
| European Patent Office | 2017