| 摘要 |
<p>PURPOSE:To improve the degree of freedom for setting swivel torque by forming a taper contact between a shaft part with a tip slit, for joining a mop support stand side bearing part and a handle fitting side annular part, and a setscrew and configuring it so that the tip of the shaft part is enlarged and opened with screwing. CONSTITUTION:A cylinder part 4 of an annular member 3 is arranged between bearing parts 2, and a shaft member 6 is fitted in a through hole 2a so as to fit a projection 6c in a notch part 2c of the bearing part 2. Subsequently, a setscrew 3 is inserted from an opposite side of the bearing part 2, and a screw part 8d is screwed in a negative screw of the shaft member 6. With this screwing, a taper face 8c of the setscrew 8 comes in contact with a taper face 6b of the shaft part, while the notch 6c at the tip of the shaft part 6 is expanded and opened, and the outer periphery of said part 6 is brought into contact with the interior of the through hole 4a. This contact can be adjusted within the range from comparatively weak frictional force to strong frictional force due to interposition of a groove 4b. Thus, the degree of freedom for swivel torque setting can be improved.</p> |
