Manual hydraulic multi-functional extra-high-voltage insulating gear gripper pliers stick for live-wire work and indirect live-wire construction method using pliers stick

A manual hydraulic multi-functional extra-high-voltage insulating gear gripper pliers stick for live-wire work, comprising:

• a handle operation unit (10) configured to control hydraulic pressure;
• an insulated extension stick (500) in which an operation bar (510) is provided so as to be coupled at a rear end thereof to a distal end of a cylinder rod (430) and to protrude forwards, the insulated extension stick (500) being coupled at a rear end thereof to a cylinder unit (400) while surrounding the cylinder unit (400), the insulated extension stick (500) protruding forwards;
• and
• a gear gripper unit (20) configured to be folded and unfolded by operation of hydraulic pressure of the handle operation unit (10),
• wherein the handle operation unit (10) comprises:
• an oil tank (100) in which oil is charged, the oil tank (100) comprising an oil outlet (110) formed at a distal end thereof and an outer portion covered with a handle (120);
• a pumping unit (200) connected to the oil tank (100) to allow or interrupt of flow of oil, the pumping unit (200) comprising a first unfolding flow path (201) and a first folding flow path (202) formed therein to allow oil to flow therethrough;
• a fixed block (300) connected to a distal end of the pumping unit (200), the fixed block (300) comprising a second unfolding flow path (301) and a second folding flow path (302) formed therein so as to be connected to the first unfolding flow path (201) and the first folding flow path (202);
• and
• the cylinder unit (400) connected to a distal end of the fixed block (300), the cylinder unit (400) comprising a third unfolding flow path (401) formed therein so as to be connected to the second unfolding flow path (301) and a third folding flow path (402) formed therein so as to be connected to the second folding flow path (302), the cylinder rod (430) being formed at a distal end of the cylinder unit (400) so as to be slidable, and
• wherein the gear gripper unit (20) comprises:
• a grip holder (600) formed at a front portion of the insulated extension stick (500), the grip holder (600) comprising a sliding bar (610) formed through a center portion thereof, the sliding bar (610) comprising a rack gear (611) formed in a front portion thereof, the sliding bar (610) being coupled at a rear portion thereof to a distal end of the operation bar (510), the grip holder (600) comprising a pair of mounting bracket operation recesses (620 and 620′) formed in opposite sides of a front portion thereof;
• a pair of pliers mounting brackets (700 and 700′), a rear portion of each of the pliers mounting brackets (700 and 700′) being inserted into and pivotably mounted to a respective one of the mounting bracket operation recesses (620 and 620′), each of the pliers mounting brackets (700 and 700′) comprising a pinion gear (710) formed in a circumferential portion of the pivotably mounted rear portion thereof so as to be threadedly engaged with the rack gear (611), the pliers mounting brackets (700 and 700′) being configured to be unfolded or folded by sliding movement of the cylinder rod (430);
• and
• pliers (1000) mounted to the pliers mounting brackets (700 and 700′), the pliers (1000) being configured to be unfolded and folded together with the pliers mounting brackets (700 and 700′).