BOLT HAVING TOOL HOLE AND ENGINE USING IT

• Main Authors: YOSHINO HISANORI, MASUKO TETSUYA
• Format: Patent
• Language: English
• Published: 11.04.2000
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To enhance a workability such as parts-mounting by attaching a cap for temporarily tacking a bolt by engaging with a tool to a bolt head portion when the tool is inserted to a tool hole. SOLUTION: When an end portion 18a of a hexagonal wrench 18 is inserted to a hole 19a of a head portion 19 of a bolt 16, a cap 21 for temporarily retaining the bolt 16 to the hexagonal wrench 18 by engaging with the wrench 18 is used. The cap 21 is made of a resin and comprises a cylindrical fitting potion 21a for fitting with an outer surface of the head portion 19 and six engaging pieces 21b formed by bending to a center side of the front end opening. A tip end 21c of the engaging pieces 21 has a slightly smaller diameter than an outer diameter of the end portion 18a as a whole and is certainly engaged with the end portion 18a. Thereby, even if a screw hole is downwardly directed and is at a deep potion, the bolt 16 does not fall off from the hexagonal wrench 18 and a parts-mounting work can easily be carried out. Since it is not required that the bolt is supported by a hand and the bolt is previously temporarily fastened in a screw hole, a workability can be enhanced.