BOLT LOOSENESS PREVENTIVE STRUCTURE

• Main Authors: TAKEMOTO YUKIHIRO, SUZUKI YASUYUKI
• Format: Patent
• Language: English
• Published: 11.12.2008
• Subjects: BLASTING; 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; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To easily and surely lock a bolt by preventing looseness, when installing, fastening and fixing various articles only by a bolt without using, for example, a nut, and even when the bolt does not project from the nut, in a bolt looseness preventive structure for preventing loosening or falling-off when the bolt for installing, fastening and fixing, for example, the various articles gradually loosens by vibration. SOLUTION: This bolt looseness preventive structure is provided for preventing looseness of the bolt 1 screwed in a female screw hole (h). A thin diameter part 12 having a diameter smaller than a male screw part 11 of the bolt 1 is arranged in a tip part of the bolt 1. A spiral elastic body 2 threadedly engaging with the female screw hole (h) and brought into pressure contact with an inner surface of the female screw hole (h), is arranged around the thin diameter part 12. One end 2a of the spiral elastic body 2 is connected to and held by the thin diameter part 12. COPYRIGHT: (C)2009,JPO&INPIT