BOLT FASTENING STRUCTURE
PROBLEM TO BE SOLVED: To provide a bolt fastening structure that can surely attain a rotation stop function by simple structure. SOLUTION: A floor plate 2 fixing a rail base of a railroad rail 1 includes a through-hole 15 allowing the insertion of a bolt head from above, and a recess 16 allowing the...
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| creator | IRIE TAKAAKI KONISHI MASANARI HANAZAKI TETSUYA |
| description | PROBLEM TO BE SOLVED: To provide a bolt fastening structure that can surely attain a rotation stop function by simple structure. SOLUTION: A floor plate 2 fixing a rail base of a railroad rail 1 includes a through-hole 15 allowing the insertion of a bolt head from above, and a recess 16 allowing the rotation of the head around an axis of a bolt shank at the rear face side of the through hole 15. The recess 16 has a depth for settling the bolt head within the thickness of the floor plate 2, and a notch allowing the rotation of the bolt head at an angle smaller than 90° in a nut fastening direction around the axis of the bolt shank. The bolt head inserted in the through-hole 15 is rotated in the nut fastening direction along the inner wall surface of the recess 16 around the bolt axis. The bolt head is thereby engaged with the notch part of the recess 16 and inhibited from being pulled out in the axis direction. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: A floor plate 2 fixing a rail base of a railroad rail 1 includes a through-hole 15 allowing the insertion of a bolt head from above, and a recess 16 allowing the rotation of the head around an axis of a bolt shank at the rear face side of the through hole 15. The recess 16 has a depth for settling the bolt head within the thickness of the floor plate 2, and a notch allowing the rotation of the bolt head at an angle smaller than 90° in a nut fastening direction around the axis of the bolt shank. The bolt head inserted in the through-hole 15 is rotated in the nut fastening direction along the inner wall surface of the recess 16 around the bolt axis. The bolt head is thereby engaged with the notch part of the recess 16 and inhibited from being pulled out in the axis direction. 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SOLUTION: A floor plate 2 fixing a rail base of a railroad rail 1 includes a through-hole 15 allowing the insertion of a bolt head from above, and a recess 16 allowing the rotation of the head around an axis of a bolt shank at the rear face side of the through hole 15. The recess 16 has a depth for settling the bolt head within the thickness of the floor plate 2, and a notch allowing the rotation of the bolt head at an angle smaller than 90° in a nut fastening direction around the axis of the bolt shank. The bolt head inserted in the through-hole 15 is rotated in the nut fastening direction along the inner wall surface of the recess 16 around the bolt axis. The bolt head is thereby engaged with the notch part of the recess 16 and inhibited from being pulled out in the axis direction. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES FOR MAKING RAILWAYS OF ALL KINDS MECHANICAL ENGINEERING PERMANENT WAY PERMANENT-WAY TOOLS THERMAL INSULATION IN GENERAL WEAPONS |
| title | BOLT FASTENING STRUCTURE |
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