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DRILL BIT AND INSTALLATION METHOD OF POST-CONSTRUCTION ANCHOR
To provide a drill bit capable of sustainably maintaining excellent diameter-expanding/restoring operation of a diameter-expandable blade and reducing installation cost.SOLUTION: A drill bit includes: a bottom-expanded sleeve 6 provided in a tip part; and a bottom-expanded blade 7 stationarily mounted inside the bottom-expanded sleeve 6. In the bottom-expanded sleeve 6, a diameter-expandable blade coming in/out window 65 is formed in a position facing a peripheral wall. The bottom-expanded blade 7 is configured of a pair of diameter-expandable blades 71 and 71 and a torsion coil spring 72 that supports the pair of diameter-expandable blades 71 and 71 in a tiltable manner on a tip side, and urges the pair of diameter-expandable blades in a closing manner, in which an engagement housing part into which an arm part 722 of the torsion coil spring 72 is engaged detachably from the respective tip parts of the diameter-expandable blade 71 is formed, and the diameter-expandable blades 71 are capable of expanding the diameter by pressing inwardly toward a back end of the bottom-expanded blade 7.SELECTED DRAWING: Figure 8
【課題】拡径刃の良好な拡径・復元動作を持続的に維持することができ、施工コストを低減することができるドリルビットを提供する。【解決手段】先端部に設けられる拡底スリーブ６と、拡底スリーブ６に定置して内装される拡底ブレード７を備え、拡底スリーブ６には、周壁の対向位置に拡径刃出入り窓６５が形成され、拡底ブレード７は、一対の拡径刃７１・７１と、一対の拡径刃７１・７１を先端側で傾動可能に支持して閉付勢するねじりコイルばね７２から構成され、拡径刃７１のそれぞれの先端側からねじりコイルばね７２のアーム部７２２が着脱自在に係入される係合収容部が形成され、拡底ブレード７の内寄り後端への押圧によって拡径刃７１が傾動して拡径可能になっているドリルビット。【選択図】図８
DRILL BIT AND INSTALLATION METHOD OF POST-CONSTRUCTION ANCHOR
To provide a drill bit capable of sustainably maintaining excellent diameter-expanding/restoring operation of a diameter-expandable blade and reducing installation cost.SOLUTION: A drill bit includes: a bottom-expanded sleeve 6 provided in a tip part; and a bottom-expanded blade 7 stationarily mounted inside the bottom-expanded sleeve 6. In the bottom-expanded sleeve 6, a diameter-expandable blade coming in/out window 65 is formed in a position facing a peripheral wall. The bottom-expanded blade 7 is configured of a pair of diameter-expandable blades 71 and 71 and a torsion coil spring 72 that supports the pair of diameter-expandable blades 71 and 71 in a tiltable manner on a tip side, and urges the pair of diameter-expandable blades in a closing manner, in which an engagement housing part into which an arm part 722 of the torsion coil spring 72 is engaged detachably from the respective tip parts of the diameter-expandable blade 71 is formed, and the diameter-expandable blades 71 are capable of expanding the diameter by pressing inwardly toward a back end of the bottom-expanded blade 7.SELECTED DRAWING: Figure 8
【課題】拡径刃の良好な拡径・復元動作を持続的に維持することができ、施工コストを低減することができるドリルビットを提供する。【解決手段】先端部に設けられる拡底スリーブ６と、拡底スリーブ６に定置して内装される拡底ブレード７を備え、拡底スリーブ６には、周壁の対向位置に拡径刃出入り窓６５が形成され、拡底ブレード７は、一対の拡径刃７１・７１と、一対の拡径刃７１・７１を先端側で傾動可能に支持して閉付勢するねじりコイルばね７２から構成され、拡径刃７１のそれぞれの先端側からねじりコイルばね７２のアーム部７２２が着脱自在に係入される係合収容部が形成され、拡底ブレード７の内寄り後端への押圧によって拡径刃７１が傾動して拡径可能になっているドリルビット。【選択図】図８
DRILL BIT AND INSTALLATION METHOD OF POST-CONSTRUCTION ANCHOR
ドリルビット及びあと施工アンカーの施工方法
JOGAN MASAHIKO (author)
2020-03-05
Patent
Electronic Resource
Japanese
IPC:
B28D
Bearbeiten von Stein oder steinähnlichen Werkstoffen
,
WORKING STONE OR STONE-LIKE MATERIALS
/
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
/
E04G
SCAFFOLDING
,
Baugerüste
/
E21B
EARTH OR ROCK DRILLING
,
Erd- oder Gesteinsbohren
/
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
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