| 摘要 |
PURPOSE: A telescopic mast is provided with a minimized shape by a linear operation method using a chain, belt or rope. CONSTITUTION: A telescopic mast comprises a body (10), a plurality of sections (11-16), a member for connecting lines and locking the sections, and a line operating unit. The plurality of sections is pulled in and out of the body, and locked each other when the sections are pulled into the body. The member for connecting lines and locking the sections is detachably connected to the lower part of section tubes. The line operating unit operates a line which is selectively connected or disconnected to the member in order to move the member for connecting lines and locking the sections. The connecting lines and locking the sections comprises a rotary member for locking the sections and a section support member. The rotary member for locking the sections comprises one or more protrusions on the inner wall, and the member is to be locked to a lower section. The section support member is connected to the rotary member for locking the sections to support the related section. |
