| 摘要 |
PURPOSE: To easily select a resin material for component members of a lubricator cap and to obtain a structure of a lubricator cap free from deterioration of an operation function. CONSTITUTION: A flange edge part 25 is formed on an upper part of a cap body. A receiving mount 28 to be engaged with a handle cap 40 is formed on an upper part of the edge part. Fitting grooves 31 are formed on a diameter line (a) of the receiving mount 28. Elastic arms 33 are formed on a diameter line (b) through an angular position α from the fitting grooves so as to extend along the receiving mount. Projected parts 34 are formed correspondingly to the tops of the elastic arms. A ratchet ring 35, which is a plate ring substantially matching to the receiving mount, is provided with connecting pieces 36 to be fitted into the fitting grooves of the cap body at the lower surface thereof. The handle cap 40 is formed into a cap body for capping the cap body. A ratchet tooth part is continuously provided on at least one of opposed surfaces of the handle cap 40 and the ratchet ring. On the other surface thereof, ratchet tooth parts each made of a group of a plurality of tooth profiles are provided on a diameter line or 3-4 equal anglular positions. |
