JP2015019506A - Indirect hot line tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indirect hot line tool capable of efficiently moving a movable body and reducing burden of an operator.SOLUTION: The indirect hot line tool includes: a tubular insulation operation rod 2; and a gripping tool 10 mounted to a tip of the insulation operation rod 2. The gripping tool 10 includes: a base body 11 in which a base part 11a provided with a through-hole 11d and a claw part 11c bent like a hook are faced to each other; a female screw part 16 provided at a portion of the through-hole 11d; a screw shaft body 14 that penetrates inside of the insulation operation rod 2 and inside of the female screw part 16; and a movable body 12, locked at a tip of the screw shaft body 14, moving between the base part 11a of the base body 11 and the claw part 11c. At the screw shaft body 14, a male screw part 14a that is screwed with the female screw part 16 is partially formed when the movable body 12 travels between the claw part 11c and a vicinity of the claw part 11c.

Description

  The present invention relates to an indirect hot wire tool used for indirect hot wire work of an overhead distribution line, and more particularly, to an indirect hot wire tool called a stray link tong in which a gripping tool is attached to a tip portion of an insulating operation rod.

  When constructing an overhead distribution line in a live line state, an indirect hot line tool is used to hold the overhead distribution line so as not to swing or to hold a compression sleeve for connecting the overhead distribution line ( For example, see Patent Document 1).

  This indirect hot wire tool is called a stray link tong, and includes a straight solid insulation operating rod 1, a gripping tool 100, and a connecting body 200, as shown in FIG. The insulating operation rod 1 is used with the tip end facing upward and the base end facing downward, and therefore, here, the indirect live tool is described as being directed up and down.

  A connecting body 200 is connected to the distal end portion (upper end portion) of the insulating operation rod 1, and the gripping tool 100 is connected to the connecting body 200. As illustrated in FIG. 7B, the gripping tool 100 includes a base 110, a movable body 120, a rotating body 130, and a screw shaft body 140.

  The base body 110 includes a base portion 111 in which through holes (not shown) are formed in the vertical direction, a columnar portion 112 extending upward from a side portion of the base portion 111, and a distal end side of the columnar portion 112 bent in a bowl shape. A claw portion 113 is integrally provided.

  The movable body 120 moves (moves up and down) between the base portion 111 and the claw portion 113 of the base 110. The raised movable body 120 and the claw portion 113 grip an aerial distribution line (not shown). The movable body 120 includes a main body 121 having a recess (not shown) formed on the lower surface, and a pair of projecting pieces 122 and 123 protruding from each end surface of the main body 121.

  Therefore, the movable body 120 is formed in an H shape in plan view. When one pair of protruding pieces 122 sandwich the columnar portion 112 of the base body 110, the movable body 120 moves up and down without rotating.

  The rotating body 130 is a cylindrical body inserted into the through hole of the base 111, and an internal thread is formed on the inner peripheral surface. The rotating body 130 is rotatable in the circumferential direction. Moreover, the upper end part of the rotary body 130 protrudes from the upper surface of the base 111, and is diameter-expanded in the shape of a flange. In addition, the lower end portion of the rotating body 130 is connected to the distal end portion of the connection body 200.

  Further, deep holes (not shown) are formed from the upper surface to the lower surface of the connection body 200. Since the connection body 200 is connected to the tip of the insulating operation rod 1, when the insulation operation rod 1 rotates in the circumferential direction, the connection body 200 and the rotating body 130 rotate in the circumferential direction integrally.

  A sawtooth portion 201 is formed in an annular shape on the upper surface of the connection body 200. A claw portion (not shown) that meshes with the sawtooth portion 201 as appropriate is provided on the lower surface of the base portion 111 of the base 110. The claw portion can be moved out and out of the base portion 111. When the claw portion protruding from the lower surface of the base 110 is engaged with the sawtooth portion 201, reverse rotation in the circumferential direction of the rotating body 130 is restricted (locked state).

  That is, the ratchet mechanism is configured by the sawtooth portion 201 of the connection body 200 and the claw portion of the base 110. A knob 150 for maintaining or releasing the locked state protrudes from the side surface of the base 111 of the base 110.

  The screw shaft body 140 is a shaft-like member formed over the entire length of a male screw into which the screw shaft body 140 is engaged with the female screw of the rotating body 130. As the rotating body 130 rotates in the circumferential direction, the screw shaft body 140 moves in the axial direction. The lower end portion of the screw shaft body 140 is inserted into the deep hole of the connection body 200. The upper end portion of the screw shaft body 140 protrudes from the upper surface of the rotating body 130 and is loosely inserted into a recessed portion formed on the lower surface of the main body 121 of the movable body 120.

  Here, the usage method of the indirect hot wire tool comprised as mentioned above is demonstrated. In the indirect hot wire tool, initially, the distance between the tip of the claw portion 113 and the movable body 120 is wider than the outer diameter of the overhead distribution line (not shown), and the overhead distribution line is between the claw portion 113 and the movable body 120. Can be passed relatively.

  And an operator makes the state which hooked the claw part 113 on the aerial distribution line, and rotates the insulation operating rod 1 in the circumferential direction (for example, clockwise). Then, the connecting body 200 and the rotating body 130 are integrally rotated in the circumferential direction, and the screw shaft body 140 is advanced (raised) by the female screw formed on the rotating body 130.

  Since the tip end portion of the screw shaft body 140 is loosely inserted into the recessed portion of the movable body 120 and the pair of projecting pieces 122 of the movable body 120 sandwich the columnar portion 112, the movable body 120 does not rotate. Move forward (rise). And this movable body 120 and the claw part 113 hold | grip in the state which tightened the aerial distribution line.

  The rotating body 130 that advances the screw shaft body 140 does not rotate in the reverse direction because the claw portion protruding from the lower surface of the base 110 meshes with the sawtooth portion 201 and is locked. Therefore, since the screw shaft body 140 and the movable body 120 do not retreat, the claw portion 113 and the movable body 120 maintain a state where the overhead distribution line is gripped.

  Then, in order to remove the gripping tool 100 from the overhead distribution line, the knob part 150 is operated using a separately carried in-line live tool so that the claw part is not caught on the sawtooth part 201 (the locked state is released). . Then, by rotating the insulating operation rod 1 in the opposite direction (for example, counterclockwise), the movable body 120 is retracted, and the gap between the claw portions 113 is greatly increased. Then, the overhead distribution line is removed from the gripping tool 100 by relatively removing the overhead distribution line from between the movable body 120 and the claw portion 113.

JP 2008-131585 A

  In the stray link tong, the insulating operation rod 1 is rotated in the circumferential direction in order to move the movable body 120 closer to or away from the claw portion 113. If the male screw formed on the screw shaft body 140 advances one pitch when the insulating operation rod 1 makes one rotation (single thread), the number of pitches formed in the moving length of the movable body 120 is insulated. The operating rod 1 must be rotated in the circumferential direction.

  Therefore, the operation of moving the movable body 120 by rotating the insulating operation rod 1 is not only inefficient, but also for an operator who works at a plurality of work sites for a long time in an upward posture. It is hard work.

  Then, this invention makes it a subject to provide the indirect hot wire tool which moved the movable body efficiently and was able to reduce a burden of an operator.

  An indirect hot-wire tool according to the present invention includes a cylindrical insulating operation rod and a gripping tool mounted indirectly or directly on a distal end portion of the insulating operation rod, and the gripping tool has a base portion in which a through hole is formed. And a base that opposes the hooked claw portion, a female screw portion provided in the portion of the through hole, a screw shaft that penetrates through the insulating operating rod and the female screw portion, and the screw A movable body that is locked to the distal end portion of the shaft body and moves between the base portion of the base and the claw portion, and the screw shaft body includes a movable body between the claw portion and the vicinity of the claw portion. A male screw part that is screwed with the female screw part when moving is partially formed.

  According to this indirect hot wire tool, by partially forming the male screw part on the screw shaft body, without rotating the insulating operation rod in the circumferential direction, by pushing or pulling in the axial direction, The movable body can be moved between the base side of the base and the vicinity of the claw portion. When the male screw portion of the screw shaft body is screwed with the female screw portion, the screw shaft body is moved in the axial direction while rotating in the circumferential direction. Since the movable body is locked to the tip of the screw shaft body, the movable body moves between the vicinity of the claw portion and the claw portion following the movement of the screw shaft body.

  Therefore, according to this indirect hot wire tool, the operator can rotate the screw shaft body in the circumferential direction only while the movable body moves between the vicinity of the claw portion and the claw portion, thereby improving work efficiency. , The burden on the operator can be reduced.

  Further, as one aspect of the indirect hot-wire tool, the female screw portion is formed on an inner peripheral surface of a cylindrical rotating body, and the rotating body rotates in a circumferential direction in a through hole provided in a base portion of the base. It is possible to adopt a configuration in which the cylinder-shaped insulating operation rod is inserted movably and connected indirectly or directly.

  According to this indirect hot wire tool, the rotating body formed with the female screw portion is inserted into the through hole formed in the base portion, and the insulating operation rod is indirectly or directly connected to the rotating body, so that insulation is achieved. When the operating rod is rotated in the circumferential direction, the rotating body rotates in the circumferential direction, and the screw shaft body moves in the axial direction by screwing the female screw portion of the rotating body and the male screw portion of the screw shaft body. .

  Moreover, as a different aspect of the indirect hot wire tool, the female screw portion may be directly provided in a through hole formed in the base portion of the base. According to this indirect hot wire tool, by rotating the screw shaft body in the circumferential direction, the male screw portion of the screw shaft body screwed with the female screw portion provided at the base portion of the base is moved in the axial direction. be able to.

  Further, as another aspect of the indirect hot-wire tool, a countersink with a diameter increasing toward the back side is formed on an end surface of the movable body facing the female screw portion, and a tip portion of the screw shaft body includes You may employ | adopt the structure in which the taper-shaped latching part engaged with a countersink is formed.

  According to this indirect hot wire tool, the locking shaft formed at the tip of the screw shaft body engages in the countersink formed in the movable body, so that the screw shaft body approaches the claw portion. When moving, the locking portion of the screw shaft body pushes the movable body toward the claw portion, and when the screw shaft body moves away from the claw portion, the tapered locking portion attracts the countersink. Then pull it away from the claws.

  Further, as still another aspect of the indirect hot wire tool, the screw shaft body includes a grip portion having a diameter enlarged toward a proximal end protruding from a proximal end portion of the insulating operation rod, and a proximal end portion of the insulating operation rod Alternatively, a configuration may be adopted in which the distance between the grip portion protruding to the maximum from the end face of the base end portion of the insulating operation rod is equal to or greater than the moving distance of the movable body.

  According to this indirect hot wire tool, the screw shaft body can be easily rotated in the circumferential direction by providing the grip portion having an enlarged diameter on the proximal end side of the screw shaft body. And since this grip part moves to the direction which approaches the base end part of an insulation operation rod, and the direction which leaves, the grip part which protrudes from the base end part of an insulation operation rod to the maximum, and the base end part of an insulation operation rod By setting the distance from the end face to be equal to or longer than the moving distance of the movable body, the movable body can be moved between the base portion of the base and the claw portion.

  ADVANTAGE OF THE INVENTION According to this invention, the indirect hot wire tool which moved the movable body efficiently and was able to reduce an operator's burden can be provided.

FIG. 1 is a partially broken front view showing a first state of a first embodiment of an indirect hot wire tool according to the present invention. FIG. 2 is a partially broken front view showing a second state of the first embodiment of the indirect hot wire tool according to the present invention. FIG. 3 is a partially broken front view showing a third state of the first embodiment of the indirect hot wire tool according to the present invention. FIG. 4 is a partially broken front view showing a first state, which is a second embodiment of the indirect hot wire tool according to the present invention. FIG. 5 is a partially broken front view showing a second state of the second embodiment of the indirect hot wire tool according to the present invention. FIG. 6 is a partially broken front view showing a third state of the second embodiment of the indirect hot wire tool according to the present invention. FIG. 7: shows the conventional indirect hot wire tool, (a) is a schematic perspective view, (b) is the perspective view which expanded the principal part.

  A first embodiment of an indirect hot wire tool according to the present invention will be described with reference to FIGS. 1 to 3.

  This indirect hot wire tool is a straight link tongue provided with an insulating operation rod 2, a gripping tool 10, and a connection body 20. The insulating operation rod 2 is a cylindrical body and will be described as being oriented in the vertical direction with the tip end facing upward and the base end facing downward.

  The connecting body 20 is fixed to the tip end portion (upper end portion in the drawing) of the insulating operation rod 2, and the gripping tool 10 is attached to the tip end portion of the connecting body 20. The gripping tool 10 includes a base body 11, a movable body 12, a rotating body 13, and a screw shaft body 14.

  The base body 11 includes a base portion 11a having a through hole 11d, a columnar portion 11b extending upward from a side portion of the base portion 11a, and a claw portion 11c obtained by bending the distal end side of the columnar portion 11b into a hook shape. Is prepared.

  And the movable body 12 moves between the base 11a of the base | substrate 11, and the claw part 11c, and grips the aerial distribution line W with the claw part 11c. The movable body 12 includes a main body portion 12b having a countersink 12a whose diameter increases toward the back side on the lower surface, and a pair of protruding pieces 12c protruding from one end of the main body portion 12b toward the columnar portion 11b of the base body 11. And a pair of projecting pieces 12d projecting from the other end of the main body portion 12b in the opposite direction to the columnar portion 11b.

  Therefore, the movable body 12 is formed in an H shape in plan view. The movable body 12 reciprocates between the base portion 11a and the claw portion 11c with one pair of protruding pieces 12c sandwiching the columnar portion 11b of the base 11.

  The rotating body 13 is a cylindrical body inserted into the through hole 11d of the base portion 11a, and is rotatable in the circumferential direction. A female screw portion 16 is formed on the inner peripheral surface of the rotating body 13 (the male screw portion 16 is formed so as to surround the screw shaft body 14, but is indicated by a dotted line in FIGS. 1 and 2). ). Moreover, the upper end part of this rotary body 13 protrudes from the upper surface of the base 11a, and is diameter-expanded in the shape of a flange. The lower end portion of the rotating body 13 protrudes from the lower surface of the base portion 11a of the base body 11, and connects the connection body 20 coaxially.

  And the connection body 20 connects the lower end part of this rotary body 13, and the front-end | tip part of the insulation operating rod 2 which is a cylinder. The connecting body 20 is also cylindrical, and a communication hole 17 that is continuous in the axial direction is formed in the rotating body 13, the connecting body 20, and the insulating operation rod 2. The inner diameter of the connecting body 20 and the inner diameter of the insulating operation rod 2 are set to be equal to or larger than the inner diameter of the rotating body 13. Further, when the insulating operation rod 2 rotates in the circumferential direction, the connecting body 20 and the rotating body 13 rotate integrally in the circumferential direction.

  A sawtooth portion 21 is formed in an annular shape on the end surface (upper surface in the drawing) where the connection body 20 faces the base portion 11 a of the base body 11. A claw portion (not shown) that meshes with the sawtooth portion 21 is provided so as to be able to move out of the lower surface of the base 11. The claw portion protruding from the lower surface of the base 11 meshes with the sawtooth portion 21, thereby restricting the reverse rotation of the rotating body 13 in the circumferential direction (locked state). That is, the ratchet mechanism is configured by the sawtooth portion 21 of the connection body 20 and the claw portion of the base body 11. A knob 15 for maintaining or releasing the locked state between the sawtooth portion 21 and the claw portion of the rotating body 13 protrudes from the side surface of the base portion 11 a of the base 11.

  The screw shaft body 14 passes through the communication hole 17 formed by the rotating body 13, the connection body 20, and the insulating operation rod 2, and a male screw portion 14a is partially formed. That is, the distal end portion of the screw shaft body 14 protrudes from the upper end portion of the rotating body 13. The base end portion of the screw shaft body 14 protrudes from the base end portion of the insulating operation rod 2. The screw shaft body 14 reciprocates in the axial direction, and the male screw portion 14a is screwed with the female screw portion 16 of the rotating body 13 at a predetermined position.

  That is, while the screw shaft body 14 is moved from the proximal end side to the distal end side (raised in the drawing) and the movable body 12 positioned on the base 11a side of the base 11 is moved to the vicinity of the claw portion 11c, the screw shaft When the movable body 12 moves between the vicinity of the claw portion 11c and the claw portion 11c without the male screw portion 14a of the body 14 screwing to the female screw portion 16 of the rotating body 13, the male screw of the screw shaft body 14 is moved. The portion 14 a is screwed into the female screw portion 16 of the rotating body 13.

  Further, a grip portion 14b having an enlarged diameter is provided at a base end portion from which the screw shaft body 14 protrudes from a base end portion (lower end portion in the drawing) of the insulating operation rod 2. The grip portion 14 b moves between a position away from the base end portion of the insulating operation rod 2 and a position approaching or contacting the base end portion of the insulating operation rod 2.

  Therefore, the base end portion of the screw shaft body 14 is configured so that the movable body 12 can grip the overhead distribution wire W by the claw portion 11c even when the grip portion 14b is raised and abuts on the base end portion of the insulating operation rod 2. However, the base end portion of the insulating operation rod 2 protrudes, and a grip portion 14b is provided. That is, the distance between the grip portion 14 b that protrudes from the base end portion of the insulating operation rod 2 to the maximum and the end face of the base end portion of the insulating operation rod 2 is equal to or greater than the moving distance of the movable body 12.

  A tapered locking portion 14 c that engages with the countersink 12 a of the movable body 12 is formed at the distal end portion (upper end portion in the drawing) of the screw shaft body 14. This locking portion 14c presses the movable body 12 toward the claw portion 11c while rotating in the circumferential direction within the countersink 12a, and draws it toward the base portion 11a.

  This indirect hot wire tool is configured as described above, and the method of use will be described next. In the indirect hot wire tool, in order to make the interval between the tip of the claw portion 11c and the movable body 12 larger than the outer diameter of the overhead power distribution line W, as shown in FIG. It is located away from the base end of the insulating operation rod 2. At this time, the male screw portion 14 a of the screw shaft body 14 is located away from the female screw portion 16 of the rotating body 13.

  Then, the operator grasps the base end portion of the insulating operation rod 2 with one hand, grasps the grip portion 14b of the screw shaft body 14 with the other hand, and enters the claw portion 11c of the base body 11 as shown in FIG. The overhead power distribution line W is positioned, and the grip portion 14b of the screw shaft body 14 is brought close to (push up) the base end portion of the insulating operation rod 2. That is, the operator can instantaneously move the movable body 12 to the vicinity of the claw portion 11c without rotating the insulating operation rod 2 and the screw shaft body 14 in the circumferential direction.

  Then, after the operator has slightly screwed the male screw portion 14a of the screw shaft body 14 with the male screw portion 16 of the rotating body 13, the operator grasps the base end portion of the insulating operation rod 2 with both hands, Is rotated in the circumferential direction to rotate the rotating body 13 in the circumferential direction. Then, the female screw portion 16 of the rotating body 13 rotates and the male screw portion 14a of the screw shaft body 14 rotates, so that the screw shaft body 14 moves forward (ascends) while rotating.

  And the latching | locking part 14c formed in the front-end | tip part of the screw shaft body 14 pushes the movable body 12 toward the claw part 11c, rotating in the circumferential direction within the countersink 12a of the movable body 12. FIG. Since the pair of projecting pieces sandwich the columnar portion 11b of the base body 11, the movable body 12 moves (rises) toward the claw portion 11c without rotating. And the movable body 12 and the claw part 11c hold | maintain the aerial distribution line W, as shown in FIG. Further, the claw portion protrudes from the lower surface of the base body 11 and engages with the sawtooth portion 21 of the connection body 20 to be locked, and the state in which the aerial distribution line W is gripped by the movable body 12 and the claw portion 11c is maintained.

  In order to remove the gripping tool 10 from the overhead power distribution line W, the knob 15 is operated using an indirect hot wire tool carried separately, and the locked state is released so that the claw portion is not caught by the sawtooth portion 21. Then, the operator grasps the insulating operation rod 2 with both hands and rotates in the opposite direction, thereby rotating the screw shaft body 14 in the opposite direction. Then, the locking portion 14c formed at the distal end portion of the screw shaft body 14 draws the countersink 12a of the movable body 12, and the movable body 12 moves (lowers) toward the base portion 11a, so that the movable body 12 and the claw portion The space | interval with 11c is extended.

  As shown in FIG. 2, when the male screw portion 14 a of the screw shaft body 14 moves (lowers) until it does not screw with the female screw portion 16 of the rotating body 13, the operator operates the insulating operation rod 2 with one hand. Then, the grip 14b of the screw shaft body 14 is grasped with the other hand, and the screw shaft body 14 is pulled in the axial direction, or the screw shaft body 14 is dropped by its own weight. That is, the operator pulls the screw shaft body 14 without rotating the insulating operation rod 2 in the circumferential direction, thereby moving the movable body 12 to the base portion 11a and widening the interval between the movable body 12 and the claw portion 11c. be able to.

  Therefore, the aerial distribution line W that has been gripped by the movable body 12 and the claw portion 11 c can be removed from the gripping tool 10. As described above, according to this indirect hot wire tool, when the gripping tool 10 grips or removes the overhead power distribution line W, the operation of moving the screw shaft body 14 linearly and the insulating operation rod 2 By combining with the operation of turning in the direction, the burden on the operator can be reduced efficiently.

  Next, a second embodiment of the indirect hot wire tool according to the present invention will be described with reference to FIGS. However, the same parts as those in the first embodiment will be described with the same reference numerals.

  The second embodiment is characterized in that the female screw portion 16 provided in the gripping tool 10 is provided directly in the through hole 11d of the base portion 11a of the gripping tool 10 instead of the rotating body 13 (the male screw portion 16). Is formed so as to surround the screw shaft body 14, but is indicated by a dotted line in FIGS. Therefore, the indirect hot wire tool of the second embodiment eliminates the need for the rotating body 13 and the connecting body 20 in the first embodiment, and directly connects the gripping tool 10 and the cylindrical insulating operation rod 2. .

  However, the screw shaft body 14 of the second embodiment includes the same male screw portion 14a, grip portion 14b, and locking portion 14c as those of the first embodiment. In addition, also in the second embodiment, the movable body 12 is formed with a countersink 12a for locking the locking portion 14c, and the base 11 of the gripping tool 10 includes a columnar portion 11b and a claw portion integrated with the base portion 11a. 11c.

  Here, the usage method of the indirect hot wire tool of 2nd Embodiment is demonstrated. As in the first embodiment, the indirect hot wire tool is initially screwed in order to make the distance between the tip of the claw portion 11c and the movable body 12 wider than the outer diameter of the overhead distribution line W, as shown in FIG. The grip portion 14 b of the shaft body 14 is located away from the base end portion of the insulating operation rod 2. In this state, the male screw portion 14a of the screw shaft body 14 is located away from the female screw portion 16 formed in the base portion 11a.

  Then, the operator grasps the base end portion of the insulating operation rod 2 with one hand, grasps the grip portion 14b of the screw shaft body 14 with the other hand, and enters the claw portion 11c of the base body 11 as shown in FIG. The overhead power distribution line W is positioned, and the grip portion 14b of the screw shaft body 14 is pushed up toward the insulating operation rod 2. That is, the operator can instantaneously move the movable body 12 to the vicinity of the claw portion 11c without rotating the insulating operation rod 2 and the screw shaft body 14 in the circumferential direction.

  Then, the operator grips the base portion 11a of the insulating operation rod 2 with one hand and rotates the grip portion 14b in the circumferential direction while holding the grip portion 14b of the screw shaft body 14 with the other hand. Then, the male screw portion 14a of the screw shaft body 14 is screwed into the female screw portion 16 provided on the base portion 11a, and the tip end portion of the screw shaft body 14 moves toward the claw portion 11c. Accordingly, the locking portion 14c formed at the tip of the screw shaft body 14 pushes the movable body 12 toward the claw portion 11c. And the movable body 12 and the claw part 11c hold | maintain the aerial distribution line W, as shown in FIG.

  In order to maintain the state in which the movable body 12 and the claw portion 11c grip the overhead power distribution line W, the operator grasps the base 11a of the insulating operation rod 2 with one hand and grips the screw shaft body 14 with the other hand. It is preferable to hold the part 14b. However, the gripping tool 10 of the second embodiment includes a ratchet mechanism (not shown), so that the operator separates each hand from the base portion 11a of the insulating operation rod 2 and the grip portion 14b of the screw shaft body 14. Can do.

  In order to remove the gripping tool 10 from the aerial distribution line W, the operator holds the base 11a of the insulating operating rod 2 with one hand so as not to move, and the gripping part of the screw shaft body 14 with the other hand. 14b is gripped, and this grip 14b is rotated in the opposite direction. Then, the male screw portion 14a of the screw shaft body 14 moves backward (lowers in the drawing) while being screwed into the female screw portion 16 of the base portion 11a.

  And if the external thread part 14a of the screw shaft body 14 remove | deviates from the internal thread part 16 of the base part 11a, the grip part 14b will be pulled and the movable body 12 will be moved to the base part 11a. Since this movable part can be moved instantaneously without rotating the screw shaft body 14 in the circumferential direction, it is efficient, and the burden on the operator can be reduced.

  The present invention can be variously modified without being limited to the above embodiment. For example, in the embodiment described above, the distal end portion of the screw shaft body 14 and the movable body 12 are locked to the tapered locking portion 14c and the countersink 12a. However, an outward flange portion is provided at the distal end portion of the screw shaft body 14, and a concave portion for inserting the flange and an inward flange portion for hooking the flange portion to reduce the diameter of the concave portion are provided on the lower surface of the movable body 12. It may be.

  In the above embodiment, the grip portion 14 b is provided at the base end portion of the screw shaft body 14. By this grip portion 14b, the operator can easily grasp the screw shaft body 14, and the burden of rotating the screw shaft body 14 in the circumferential direction is reduced. However, the grip portion 14 b is not necessarily provided on the screw shaft body 14.

  In the first embodiment, the rotating body 13 and the insulating operation rod 2 are connected via the connection body 20. However, the rotating body 13 and the insulating operation rod 2 may be directly connected without using the connection body 20.

2 ... Insulating operation rod 10 ... Holding tool 11 ... Base 11a ... Base 11c ... Claw 11d ... Through hole 12 ... Movable body 12a ... Countersink 12b ... Main body 13 ... Rotating body 14 ... Screw shaft Body 14a ... male screw part 14b ... grip part 14c ... locking part 16 ... female screw part 20 ... connection body

Claims (5)

A cylindrical insulating operating rod, and a gripping tool mounted indirectly or directly on the tip of the insulating operating rod,
The gripping tool includes a base in which a base portion having a through hole formed therein and a claw portion bent in a bowl shape are opposed to each other, a female screw portion provided at a portion of the through hole, the inside of the insulating operation rod, and the female screw. A screw shaft that penetrates the inside of the part, and a movable body that is locked to the tip of the screw shaft and moves between the base portion of the base and the claw portion,
The screw shaft body is partially formed with a male screw portion that is screwed with the female screw portion when the movable body moves between the claw portion and the vicinity of the claw portion. Indirect hot wire tool.   The female screw portion is formed on an inner peripheral surface of a cylindrical rotating body, and the rotating body is inserted into a through hole provided in a base portion of the base body so as to be rotatable in the circumferential direction. The indirect hot wire tool according to claim 1, wherein the bars are connected indirectly or directly.   The indirect hot wire tool according to claim 1, wherein the female screw portion is directly provided in a through hole formed in a base portion of the base body.   The end face of the movable body facing the female screw part is formed with a countersink whose diameter increases toward the back side, and a tapered locking part that engages the countersink at the tip of the screw shaft body The indirect hot wire tool according to any one of claims 1 to 3, wherein is formed.   The screw shaft body includes a grip portion having a diameter enlarged on a base end side protruding from a base end portion of the insulating operation rod, and a grip portion protruding to the maximum from the base end portion of the insulating operation rod and the insulating operation rod The indirect hot tool according to any one of claims 1 to 4, wherein a distance between the base end portion and the end surface of the base member is equal to or greater than a moving distance of the movable body.

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