An automatic direction switching pendulum-type rotary drive gear ratchet tensioner having an unlimited tension distance adjustment function for indirect live wire work, the automatic direction switching pendulum-type rotary drive gear ratchet tensioner comprising:
- a body (100) formed of front and rear support plates (110) and (110′) so as to be formed open to an upper side, a lower side, and one side of the body, wherein an idle gear (120) and an interlocking gear (130) having a support roller (131) are engaged with each other and are axially installed at a front middle part and one side of the front support plate (110), the body comprising:
- an insulating rope connection part (140) formed on one end of the body and a hook (150) formed on the other end of the body;
- upper and lower guide rollers (160) and (160′) respectively formed on upper and lower portions of the one side of the body;
- and a lever installation part (111) disposed on a front side of the one side of the body, the lever installation part being configured to restrict the idle gear (120) and the interlocking gear (130);
- a rotary operating lever (200) comprising a rotary operating shaft (210), a cam (220), a rotary operating mechanism (230), and a buffer key (240), wherein the rotary operating shaft (210) is axially installed in the lever installation part (111) and has a rotary ring (211), wherein the cam (220) is disposed at a tip portion of the rotary operating shaft (210) and is formed at a location eccentric from a central portion of the tip portion, wherein the rotary operating mechanism (230) is rotatably coupled to the rotary operating shaft (210) at a rear side of the cam (220), has a movable long hole (231) formed in a circumferential direction thereof, and has a locking protrusion (232) formed to protrude from a circumference thereof, and wherein the buffer key (240) connects the rotary operating shaft (210) to the rotary operating mechanism (230);
- a gear roller (300) formed between the front and rear support plates (110) and (110′) and disposed on the other side of the body (100), wherein the gear roller is axially installed on a roller shaft (310) protruding forwards from the body, has an insulating rope guide groove (320) formed in a circumference of a middle portion thereof, and has insulating rope pressurization protrusions (330) and (330′) respectively formed on opposite inner sides of the gear roller;
- a clutch part (400) disposed on the front side of the body (100) and coupled to a circumference of the roller shaft (310), wherein the clutch part (400) conducts forward or reverse rotation of the roller shaft (310) by preventing reverse rotation of an inner ring and simultaneously performing reverse rotation of the inner ring and an outer ring;
- a roller shaft operating plate (500) disposed on a front side of the clutch part (400) and coupled to the circumference of the roller shaft (310), wherein the roller shaft operating plate has saw teeth (510) formed on a circumference of a middle portion thereof;
- a pendulum (600) coupled to a rear side of the roller shaft operating plate (500) and formed to protrude toward one side thereof so as to have a horizontal long hole (610) configured to accommodate the cam (220) therein, wherein the pendulum performs reciprocating pendulum motion relative to the roller shaft (310) by operation of the cam (220) and has an automatic revering pawl mounting groove (620) formed in a front surface thereof and disposed between the rotary operating shaft (210) and the roller shaft operating plate (500);
- a roller shaft support plate (700) formed to penetrate a front circumference of the roller shaft operating plate (500) and coupled to the pendulum (600), wherein the roller shaft support plate is formed to protrude toward one side thereof;
- an automatic reversing pawl (800) having a pawl shaft (801) coupled to the automatic revering pawl mounting groove (620), wherein the automatic reversing pawl interferes with the roller shaft operating plate (500) and performs reciprocating motion thereof so as to provide forward or reverse rotational force of the roller shaft operating plate (500);
- a pawl reversing key (900) coupled to the pawl shaft (801) with the automatic reversing pawl (800) and formed to protrude from the roller shaft support plate (700) toward one side thereof, wherein the pawl reversing key interferes with the locking protrusion (232) during rotation of the rotary operating mechanism (230) so as to provide reciprocating rotational force of the automatic reversing pawl (800), and wherein the pawl reversing key has first and second reversing key spring balls (910) and (910′) installed thereon so as to constantly maintain horizontality thereof, wherein the first and second reversing key spring balls are formed to be symmetrical relative to the pawl shaft (801);
- a roller shaft rotary lever (1000) disposed on a front side of the roller shaft operating plate (500) and coupled to the roller shaft (310) and the roller shaft operating plate (500);
- an insulating rope (1100) configured to enter the one side of the body (100) and to be withdrawn from the body via the gear roller (300), the insulating rope being fixedly connected to the insulating rope connection part (140);
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- a wire clip (1200) configured for the insulating rope (1100) withdrawn from the body (100) to pass therethrough, the wire clip being configured to grip a wire, wherein:
- the body (100) further comprises an insulating rope pressurization opening/closing means (170) formed to face the support roller (131), the insulating rope pressurization opening/closing means being configured to increase a tension limit by applying pressurizing force to the insulating rope (1100),
- the insulating rope pressurization opening/closing means (170) comprises:
- a guide groove (171) formed to be open downwards in the front and rear support plates (110) and (110′) of the body (100);
- a pressurizing roller (172) formed around a pressurizing roller shaft (172a) configured for both sides thereof to be accommodated in the guide groove (171), the pressurizing roller shaft having a rear side formed to protrude outwards from the rear support plate (110′), the pressurizing roller being configured to apply the pressurizing force to the insulating rope (1100) with the support roller (131) between the front and rear support plates (110) and (110′);
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- a spring housing (173) having one side pivotally coupled to a rear side of the rear support plate (110′) so as to be rotatable, the spring housing having a vertical hole (174) formed in the other side thereof and configured for a protruding portion of the pressurizing roller shaft (172a) to pass therethrough, the spring housing having a pressurizing spring (175) elastically installed on an inner side thereof in a vertical direction, the pressuring spring being configured to provide elasticity to the pressurizing roller shaft (172a), the spring housing having a housing hook (176) formed on the other end thereof, and
- the body further comprises a pressurization release part (180) comprising a lever housing (181) formed to face the spring housing (173), the lever housing having a horizontal long hole (182) formed in a circumference thereof and being open toward the spring housing (173), a release lever (183) accommodated in the lever housing (181) and formed to penetrate the horizontal long hole (182) so as to protrude outwards, the release lever having a lever hook (184) formed on a front end thereof and configured to be hooked with the housing hook (176), and a spring (185) elastically installed on an inner side of the lever housing (181) and configured to provide protruding force to the release lever (183).