CN109075543B - Holding tool for indirect live-wire work - Google Patents
Holding tool for indirect live-wire work Download PDFInfo
- Publication number
- CN109075543B CN109075543B CN201780028429.3A CN201780028429A CN109075543B CN 109075543 B CN109075543 B CN 109075543B CN 201780028429 A CN201780028429 A CN 201780028429A CN 109075543 B CN109075543 B CN 109075543B
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- Prior art keywords
- gripping
- movable
- fixed
- grip
- abutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J1/00—Manipulators positioned in space by hand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B9/00—Hand-held gripping tools other than those covered by group B25B7/00
- B25B9/02—Hand-held gripping tools other than those covered by group B25B7/00 without sliding or pivotal connections, e.g. tweezers, onepiece tongs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J1/00—Manipulators positioned in space by hand
- B25J1/04—Manipulators positioned in space by hand rigid, e.g. shelf-reachers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Abstract
The invention provides a gripping tool for indirect hot-line work, which can reliably grip a linear body, a plate-shaped body or a cloth-shaped body with the diameter or the thickness of 2 mm-5 mm without damage. The gripping tool (10) for indirect hot-line work is characterized by comprising an insulating operating rod (14), a gripping part (12) having a movable gripping part (20) and a fixed gripping part (22), an auxiliary insulating operating rod (24), a gripping operating part (26) and a pivot (30), wherein the fixed gripping part (22) and the movable gripping part (20) comprise bases (22d, 20d), arms (22b, 20b) and abutting parts (22a, 20a), the abutting parts (22a) and the abutting parts (20a) are respectively provided with a plurality of protruding strips (W), and the abutting parts (22a) and the abutting parts (20a) of the fixed gripping part (22) and the movable gripping part (20) are configured to grip electric wires (84) at intervals which are the same as or close to the diameter of the gripped electric wires (84) when the electric wires (84) are gripped.
Description
Technical Field
The present invention relates to a gripping tool for indirect hot-line work. In particular, the present invention relates to an indirect live-working gripping tool that can indirectly perform live-working on a high-voltage distribution line in a non-power-off state and can grip an electric wire or the like.
Background
Conventionally, there are two types of live-line work for performing a distribution work on a high-voltage distribution line without stopping the power supply, namely, a direct live-line work method and an indirect live-line work method. The direct live working method is a working method in which a worker wears a protector such as a high-voltage rubber glove and performs a power distribution work by directly contacting a high-voltage power distribution line being energized, but there is a risk of an electric shock accident occurring to the worker. In contrast, the indirect live working method is a method in which a worker performs a power distribution process without directly contacting a high-voltage distribution line being energized, using a gripping tool for indirect live working.
Generally, the gripping tool for indirect hot-line work includes a gripping tool for indirect hot-line work called an insulating clamp. This insulating clamp is configured such that a front end tool mounted on a front end portion of an operating rod cannot be replaced. That is, the insulating pliers are a special tool, and are tools mainly used for holding the electric wire. The insulation clamps are generally used for holding relatively thick wires, but not limited to wires, but also used for holding a plurality of objects such as birds and snakes. In addition to the work around the wire grip used in the live wire engineering, the insulating pliers are also used for the work of gripping a relatively thin electric wire.
(Prior art document)
(patent document)
Patent document 1: japanese laid-open patent publication No. 7-298436
Disclosure of Invention
(problems to be solved by the invention)
Conventionally, when an operator performs a work of cutting a down conductor of a high-voltage distribution line or the like by using a gripping tool for indirect live working, when there is a possibility that a plurality of objects are gripped, it is necessary to prepare a plurality of gripping tools for indirect live working such as insulating tongs or an insulating quick lock (one type of insulating tongs in which the tips of gripping portions intersect) so that the operator can perform the work according to the objects to be gripped.
However, since the angles of the two distal end portions of the gripping arms of the insulating clamp are set so as to abut when the gripping arms are completely closed, the distal end portions are set so as to open outward from the rotation axis when a conventional insulating clamp (e.g., a live-wire gripping tool (hotand) described in patent document 1) is used to grip a linear body, a plate-like body, or a cloth-like body. Thus, in the object to be gripped, the pressing forces acting on the object to be gripped by the respective abutment portions do not cancel each other, and a force is generated in the longitudinal direction of the abutment portions. Therefore, the object may fall off from the tip end portion of the gripping arm to the inside or the outside.
Further, the contact portion between the distal end portion of the gripping arm and the object to be gripped is often formed in a plurality of projecting shapes, but depending on the spacing, shape, or position of the projecting shapes, the pressure applied to the object to be gripped is too large, and there is a possibility that the object to be gripped may be damaged. For example, when the object to be gripped is an electric wire, the conventional insulation clamp may peel or cut the coating of the electric wire.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a gripping tool for indirect hot-line work, which can grip a linear body, a plate-like body, or a cloth-like body having a diameter or thickness of 2mm to 5mm with reliability and without damage.
(means for solving the problems)
The gripping tool for indirect hot-line work according to claim 1 of the present invention includes: an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body; a grip portion provided at the axial end of the insulated operating rod and having a movable grip portion and a fixed grip portion that are brought into contact with and separated from each other by an operation of the grip portion provided on the insulated operating rod; an insulating auxiliary insulating operation rod for assisting the contact or separation operation of the holding part connected with the front end; a grip operation part which is attached near the base end of the insulating operation rod, is rotatably connected to the base end of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in the longitudinal direction of the auxiliary insulating operation rod by leverage; and a pivot for connecting the fixed gripping part and the movable gripping part, wherein the fixed gripping part and the movable gripping part of the gripping part have: a base; an arm portion formed in a substantially arc shape protruding outward on a surface including the insulating operation rod in the axial direction; and an abutting portion connected to a front end of the arm, the fixed grip portion being rotatably connected to a front end of the insulating operation rod at a base portion of the fixed grip portion, the movable grip portion being rotatably connected to a front end of the auxiliary insulating operation rod at a base portion of the movable grip portion, the movable grip portion being rotatably connected to an upper portion of the base portion of the fixed grip portion via a pivot near a base end portion of the arm, the movable grip portion being rotatable toward the fixed grip portion in accordance with an operation of the grip operation portion, the abutting portion of the fixed grip portion and the abutting portion of the movable grip portion each being provided with a plurality of protrusions extending in a direction intersecting an axial direction of the insulating operation rod in parallel, the plurality of protrusions of the fixed grip portion and the plurality of protrusions of the movable grip portion being substantially equal in height, a ridge line of the protrusion of the fixed grip portion opposing a ridge line of the protrusion of the movable grip portion, when the contact portion of the fixed holding portion and the contact portion of the movable holding portion are closed, the contact portions are in contact with the tip side opposite to the base portion, and the apexes of the protrusions in the contact portion of the fixed holding portion and the apexes of the protrusions in the contact portion of the movable holding portion are configured to be separated toward the base portion.
The grip tool for indirect hot-line work according to claim 2 of the present invention is characterized in that the interval in the parallel direction of the projected strips in each contact portion of the fixed grip portion and the movable grip portion is 2 mm.
The grip tool for indirect hot-line work according to claim 3 of the present invention is characterized in that the cross-sectional shape in the direction in which the plurality of protrusions are arranged in each contact portion of the fixed grip portion and the movable grip portion is formed in a sine wave shape.
The grip tool for indirect hot-line work according to claim 4 of the present invention is characterized in that the plurality of protrusions in each of the contact portions of the fixed grip portion and the movable grip portion are provided at positions where ridge lines at the tips of the plurality of protrusions are butted against each other in a direction in which the plurality of protrusions are arranged.
According to the grip tool for indirect hot-line work of claim 1, when the fixed grip portion and the movable grip portion grip the object to be gripped having a diameter or a thickness of 2mm to 5mm, a plane formed by the ridge lines of the plurality of protrusions in the contact portion of the fixed grip portion and a plane formed by the ridge lines of the plurality of protrusions in the contact portion of the movable grip portion are substantially parallel to each other. Thus, the object to be gripped receives only mutually canceling pressures from the respective contact portions, and does not receive a force to move the object in the longitudinal direction of the contact portions. Therefore, there is no possibility that the object to be gripped having a diameter or thickness of 2mm to 5mm may fall off inside or outside the gripping portion.
According to the gripping tool for indirect hot-line work of the invention of claim 2, the interval in the parallel direction of the projected lines in each of the abutment portions of the fixed gripping portion and the movable gripping portion is 2 mm. Thus, when the gripping tool for indirect hot-line work grips an object to be gripped having a diameter or thickness of 2mm to 5mm between the abutting portions, there is no possibility that the object to be gripped is damaged. That is, if the interval is wider than 2mm, the number of beads coming into contact with the object to be gripped is small, and the pressure from the beads acts on the object to be gripped only in the minute region. Therefore, the pressure is concentrated on a narrow area of the object to be gripped, and as a result, the object to be gripped may be damaged. For example, when the object to be gripped is a wire having a diameter of 2mm and the interval is 3mm, there is a possibility that the coating of the wire is peeled or cut because one projection is provided on any of the contacting portions that contact the wire. Thus, when the interval is 2mm, even if the holding object is an electric wire having a diameter of 2mm, there are two protrusions which come into contact with the electric wire on any contact portion side, and therefore there is no fear that the electric wire is damaged. On the other hand, if the interval is less than 2mm, the protrusions may be easily clogged with foreign matter, and the function of preventing slippage of the protrusions may not be exhibited. In addition, the narrower the interval, the greater the number of the projected streaks, which leads to an increase in the difficulty of processing.
According to the gripping tool for indirect hot-line work of the invention of claim 3, the cross-sectional shape in the direction in which the plurality of protrusions are arranged in each abutting portion of the fixed gripping portion and the movable gripping portion is not a sharp shape but a sinusoidal waveform. Thus, when each of the contact portions grips an object to be gripped having a diameter or thickness of 2mm to 5mm, there is no possibility that the object to be gripped is damaged. That is, when the tip of the ridge has a sharp shape, the pressure from the ridge acts on the object to be gripped only in the minute region. Therefore, stress is concentrated on a narrow area of the object to be gripped, and as a result, the object to be gripped may be damaged. For example, when the object to be gripped is an electric wire, the tip of the sharp-shaped projection may peel or cut the coating of the electric wire. On the other hand, if the cross-sectional shape of the plurality of ridges is a sine wave, the pressure acting on the object to be gripped is dispersed, and there is no possibility that the object to be gripped is damaged.
According to the gripping tool for indirect hot-line work of the invention of claim 4, the plurality of protrusions in each abutting portion of the fixed gripping portion and the movable gripping portion are provided at positions where ridge lines at the tips of the plurality of protrusions abut against each other in the direction in which the plurality of protrusions are arranged. Thus, when each of the contact portions grips an object to be gripped having a diameter or thickness of 2mm to 5mm, there is no possibility that the object to be gripped is damaged. That is, when the ridge of each abutting portion is provided at a position where the abutting portions are engaged with each other, the ridge applies a pressure such as shearing to the object to be gripped. The object of the present invention is to enable a linear body, a plate-like body or a cloth-like body having a diameter or a thickness of 2mm to 5mm to be gripped reliably and without damage, but when the above-described projecting strip is provided at a position where the abutting portions are engaged, such a thin or thin object to be gripped may be easily cut. In contrast, when the respective abutting portions are provided at positions where the ridges at the distal ends of the plurality of protrusions abut against each other in the direction in which the plurality of protrusions are arranged, the protrusions do not apply a shearing force to the object to be gripped.
(Effect of the invention)
According to the grasping tool for indirect electric working of the invention of claim 1, a linear body, a plate-like body, or a cloth-like body having a diameter or thickness of 2mm to 5mm can be reliably grasped.
According to the grasping tool for indirect hot-line work of the invention of claim 2, a linear body, a plate-like body, or a cloth-like body having a diameter or a thickness of 2mm to 5mm can be grasped without damage.
According to the grasping tool for indirect hot-line work of the invention of claim 3, a linear body, a plate-like body, or a cloth-like body having a diameter or a thickness of 2mm to 5mm can be grasped without damage.
According to the grasping tool for indirect hot-line work of the invention of claim 4, a linear body, a plate-like body, or a cloth-like body having a diameter or a thickness of 2mm to 5mm can be grasped without damage.
The above object, other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Drawings
Fig. 1 is an explanatory front view showing a gripping tool for indirect hot-line work according to the present invention.
Fig. 2 is an enlarged front view illustrating the vicinity of a grip portion of the indirect hot-line work gripping tool of fig. 1 in a closed state.
Fig. 3 (a) is an enlarged perspective view of a fixed grip portion of the indirect live working grip tool, and (B) is an enlarged perspective view of a movable grip portion of the indirect live working grip tool.
Fig. 4 is an enlarged front view illustrating a state in which a gripping portion of the gripping tool for indirect live working grips and grips an object (an electric wire having a diameter of 2mm to 5 mm), in the vicinity of the gripping portion.
Detailed Description
A gripping tool for indirect hot-line work according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the axial direction of the insulating operating rod 14 is defined as the up-down direction, and the direction away from the center axis of the insulating operating rod 14 is defined as the outward direction. The embodiments described below are merely examples embodying the present invention, and do not limit the technical scope of the present invention.
The gripping tool 10 for indirect electric working shown in fig. 1 includes: a grip 12 for gripping an object to be gripped 84; an insulating operation rod 14 having a grip portion 12 attached to a distal end portion thereof; an auxiliary insulating operation rod 24 for transmitting the operation of the holding operation part 26 to the holding part 12; a grip operation part 26 provided near the base end of the insulated operating rod 14; and a pivot 30. The grip operation portion 26 is used to operate the contact and separation operation of the grip portion 12. Hereinafter, each component will be described in detail.
The insulated operating rod 14 is a columnar rod-shaped member made of an insulating material, and has a length equal to or longer than a safe distance for keeping safety between the electric wire and the human body. In the insulated operating rod 14, a rain shield 16 or a flange 18 is provided to avoid creeping discharge or electric leakage. As described above, the grip portion 12 is attached to the distal end portion of the insulated operating rod 14, and the grip operating portion 26 is provided near the proximal end portion. The worker grasps the base end portion of the insulated operating rod 14, positions the grip portion 12 attached to the tip end portion to the working position, and performs the operation of contacting and separating the grip portion 12 by the grip operating portion 26.
The auxiliary insulating operation rod 24 is made of the same material as the insulating operation rod 14, and is provided with a rain shield 16 for preventing electric leakage and creeping discharge. The distal end of the auxiliary insulating operation rod 24 is rotatably connected to a base 20d of the movable grip 20 described later. The proximal end portion of the auxiliary insulating lever 24 is rotatably connected to an operation piece 26e of the grip operation portion 26, which will be described later.
The grip portion 12 includes a movable grip portion 20 and a fixed grip portion 22.
As shown in fig. 3 (a), the fixed grip portion 22 has a hole 22e, a base portion 22d, a hole 22c, an arm portion 22b, and an abutting portion 22 a. The fixed grip portion 22 is made of a hard material, for example, a metal material, and a base portion 22d of the fixed grip portion 22 is fitted and fixed to the distal end portion of the insulated operating rod 14. The base portion 22d of the fixed grip portion 22 is connected to an arm portion 22b extending substantially upward and formed in a substantially arc shape with its entire shape projecting outward. The arm portion 22b has a first curved portion 22b1, a second curved portion 22b2, and a third curved portion 22b 3. The first curved portion 22b1 is connected generally upwardly to the base portion 22 d. The second curved portion 22b2 is smoothly connected generally upward and outward from the first curved portion 22b 1. The third curved portion 22b3 is rounded generally upwardly and inwardly from the second curved portion 22b 2. The contact portion 22a that contacts the gripping object 84 is connected substantially upward from the third curved portion 22b3 of the arm portion 22 b. The contact portion 22a is provided with a plurality of protrusions W extending in the same direction as the axial direction of the pivot shaft 30 described later, which are arranged in parallel from the base portion 22d side so as to prevent the object 84 from slipping. The heights of the plurality of projecting strips W of the abutting portion 22a of the fixed grip portion 22 are substantially the same. The fixed grip portion 22 is formed in such a way that the width gradually decreases in a direction perpendicular to the axial direction of the pivot shaft 30 from the base portion 22d, the first curved portion 22b1, the second curved portion 22b2, and the third curved portion 22b3 of the arm portion 22b to the contact portion 22 a. A hole 22c for passing the pivot shaft 30 is formed in the first curved portion 22b1 of the arm portion 22 b. A hole 22e for passing the arm portion 20b of the movable grip described later, which is connected from the first curved portion 22b1 of the arm portion 22b to the middle of the second curved portion 22b2 and the third curved portion 22b3, is formed in a direction orthogonal to the axis of the pivot shaft 30.
As shown in fig. 3 (B), the movable grip portion 20 includes a base portion 20d, a hole 20c, an arm portion 20B, and an abutting portion 22 a. The movable grip portion 20 is formed of the same hard material as the fixed grip portion 22, for example, a metal material. An arm portion 20b extending substantially upward from the base portion 20d of the movable grip portion 20 and formed in a substantially arc shape with its entire shape projecting outward is connected. The arm portion 20b is formed with a hole 20c for passing the pivot shaft 30 near the base portion 20 d. Further, an abutting portion 20a that abuts against the object to be gripped 84 is connected substantially upward from the tip of the arm portion 20b of the movable grip portion 20. The contact portion 22a is provided with a plurality of protrusions W extending in the same direction as the axial direction of the pivot shaft 30 described later, which are arranged in parallel from the base portion 20d side so that the object 84 does not slip. The heights of the plurality of projecting strips W of the contact portion 20a of the movable gripping portion 20 are substantially the same. The movable grip portion 20 is formed to have an overall shape that gradually widens from the base portion 20d to the hole 20c and gradually narrows from the hole 20c to the arm portion 20b to the contact portion 20a in a direction orthogonal to the axial direction of the pivot shaft 30. The arm portion 20b is formed with a plurality of holes in the axial direction of the pivot shaft 30 for reducing the weight of the movable grip portion 20. In order to insert the movable grip portion 20 through the hole 22e formed in the arm portion 22b of the fixed grip portion 22, the arm portion 20b is formed to be narrow in the axial direction of the pivot shaft 30 by a width substantially equal to the width of the hole 22 e.
The movable grip 20 is rotatably connected to the tip end of the auxiliary insulating operation rod 24 at the base 20 d. The movable grip 20 is rotatably connected to the first curved portion 22b1 of the arm 22b of the fixed grip 22 via the pivot 30 at the hole 20 c. The movable grip portion 20 is rotatable in the direction of arrow B about the axial center of the pivot shaft 30 in accordance with the operation of the operating lever 26a of the grip operating portion 26. By reducing the weight of the movable grip portion 20, the inertial mass of the movable grip portion 20 is reduced, and the force required for operating the operating lever 26a is reduced.
The pivot 30 connects the fixed grip portion 22 and the movable grip portion 20. A hole 22c through which the pivot shaft 30 passes is formed in the first curved portion 22b1 of the arm portion 22b of the fixed grip portion 22. A hole 20c for passing the pivot shaft 30 is formed near the base 20d of the arm portion 20b of the movable grip portion 20. The pivot shaft 30 passes through the hole 22c and the hole 20c in a direction orthogonal to the axial direction of the insulating operating rod 14 and orthogonal to the direction in which the fixed grip portion 22 and the movable grip portion 20 are in contact with and separated from each other. Thus, the fixed grip portion 22 and the movable grip portion 20 are connected to each other in a rotatable manner by inserting the pivot shaft 30 through the hole 22c of the fixed grip portion 22 and the hole 20c of the movable grip portion 20.
As shown in fig. 2, a plane formed by the ridge lines of the plurality of ridges W in the contact portion 20a of the movable grip portion 20 (hereinafter referred to as "plane 20a 1") is inclined by approximately 3 degrees (θ 1 in fig. 2), for example, 3.17 degrees, toward the contact portion 22a side of the opposing fixed grip portion 22 in a linear direction extending from the axial center of the pivot shaft 30 toward the ridge line of the ridge W of the movable grip portion 20 closest to the axial center of the pivot shaft 30. Similarly, a plane formed by the ridge lines of the plurality of ridges W in the contact portion 22a of the fixed grip portion 22 (hereinafter referred to as "plane 22a 1") is inclined by approximately 3 degrees (θ 2 in fig. 2), for example, 3.17 degrees, toward the contact portion 20a side of the opposing movable grip portion 20 in a linear direction extending from the axial center of the pivot shaft 30 toward the ridge line of the ridge W of the fixed grip portion 22 closest to the axial center of the pivot shaft 30. Thus, as shown in fig. 4, when the contact portions 20a and 22a hold the object 84 having a diameter or thickness of 2mm to 5mm, the flat surface 20a1 on the contact portion 20a is substantially parallel to the flat surface 22a1 on the contact portion 22 a. Thus, the object 84 is subjected to only the mutually canceling pressures from the contact portions 20a and 22a, and is not subjected to the force of moving in the longitudinal direction of the contact portions 20a and 22 a. Therefore, the gripping object 84 having a diameter or thickness of 2mm to 5mm may not fall off to the inside or outside of the gripping section 12.
The ridge of the ridge W of the fixed grip portion 22 faces the ridge of the ridge W of the movable grip portion 20. The apexes of the projecting strips W in the abutting portions 22a of the fixed gripping portions 22 and the apexes of the projecting strips W in the abutting portions 20a of the movable gripping portions 20 abut against the tip end sides of the abutting portions 22d and 20d on the opposite side and are separated toward the base portions 22d and 20d when the abutting portions 22a of the fixed gripping portions 22 and the abutting portions 20a of the movable gripping portions 20 are closed. When the abutting portion 22a of the fixed grip portion 22 and the abutting portion 20a of the movable grip portion 20 grip the electric wire 84, the electric wire 84 is gripped at an interval equal to or close to the diameter of the electric wire 84.
The interval (h 1, h2 in fig. 3) between the abutting portions 20a and 22a in the direction in which the ridges W are arranged is 2 mm. Accordingly, when the gripping tool 10 for indirect electric working grips the object 84 having a diameter or thickness of 2mm to 5mm by the abutting portions 20a and 22a, the object 84 is not likely to be damaged. That is, when the interval is wider than 2mm, the ridge W abutting on the object 84 is small, and the pressure from the ridge W acts on the object 84 only in a small region. Therefore, the stress is concentrated on a narrow area of the object 84, and as a result, the object 84 may be damaged. For example, when the holding object 84 is a wire having a diameter of 2mm and the above-mentioned interval is 3mm, there is a possibility that the coating of the wire is peeled off or cut because there is only one protrusion W which comes into contact with the wire on any contact portion side. Thus, if the distance between the ridges W is 2mm, even if the holding object 84 is a wire having a diameter of 2mm, there are two ridges W that contact the wire on any contact portion side, and there is no possibility that the wire is damaged. On the other hand, when the distance is less than 2mm, the ribs W may be easily clogged with foreign matter, and the function of preventing slippage of the ribs W may not be exhibited. Further, the narrower the interval, the greater the number of the projected streaks W, which leads to an increase in difficulty in processing.
As shown in fig. 3 (a) and (B), the cross-sectional shape in the direction in which the plurality of ribs W provided in the abutting portions 20a and 22a are arranged is not a sharp wave shape but a sine wave shape. Thus, when the abutting portions 20a and 22a grip the object 84 having a diameter or thickness of 2mm to 5mm, there is no possibility that the object 84 is damaged. That is, when the tip of the ridge W has a sharp shape, the pressure from the ridge W acts on the object 84 only in the small region. Therefore, the pressure is concentrated on a narrow area of the object 84, and as a result, the object 84 may be damaged. For example, when the holding object 84 is an electric wire, the electric wire may be stripped or cut at the tip of the sharp projection. On the other hand, if the cross-sectional shape of the plurality of beads W in the parallel direction is a sine wave, the pressure applied to the object 84 by the beads W is dispersed, and there is no possibility that the object 84 is damaged.
As shown in fig. 4, the plurality of ridges W provided in the abutting portions 20a and 22a are provided at positions where ridges at the tips of the plurality of ridges abut against each other in the direction in which the plurality of ridges are arranged. Thus, when the abutting portions 20a and 22a grip the object 84 having a diameter or thickness of 2mm to 5mm, there is no possibility that the object 84 is damaged. That is, even when the plurality of protrusions W of the abutting portions 20a and 22a are provided at positions where the ridges at the distal ends thereof mesh in the direction in which the plurality of protrusions are arranged, the protrusions W apply pressure to the object 84, such as shear. In this case, since the object of the present invention is to enable gripping of a linear body, a plate-like body, or a cloth-like body having a diameter or thickness of 2mm to 5mm, the thin or thin object 84 may be easily cut. In contrast, when the abutting portions 20a and 22a are provided at positions where the ridge lines of the distal ends of the plurality of protrusions W abut against each other in the direction in which the plurality of protrusions are arranged, the protrusions W do not apply a shearing force to the object to be gripped 84.
The grip operation portion 26 is provided near the base end portion of the insulated operating rod 14. The grip operation portion 26 includes an operation lever 26a, a support metal member 26b, a release lever 26c, an operation pivot 26d, and an operation piece 26 e. The support metal member 26b is pivotally supported by the operation shaft 26d at the operation lever 26 a. An operating piece 26e projecting to the same side as the operating rod 26a and the insulating operating rod 14 is rotatably connected to the base end portion of the auxiliary insulating operating rod 24. Therefore, when the worker performs the operation of grasping the operating rod 26a, the auxiliary insulating operating rod 24 is pulled downward by the lever action, and the movable grip portion 20 of the grip portion 12 is operated so as to be closed toward the fixed grip portion 22. Thereby, the gripping object 84 is gripped between the movable gripping part 20 and the fixed gripping part 22.
Further, a spring 28 that biases the operating lever 26a in the opening direction is attached between the support metal member 26b and the operating lever 26 a. When the operator does not operate the operating lever 26a, the operating lever 26a is in the open state by the spring 28, and accordingly, the movable grip portion 20 is also held in the open state separated from the fixed grip portion 22.
The support metal member 26b is provided with a lock mechanism that is a known structure described in detail in patent document 1 and will be briefly described below. The lock mechanism includes: a bearing-shaped one-way clutch (not shown) used at a fulcrum position of a lever attached to the operating lever 26 a; an operation shaft 26d for supporting the one-way clutch; a plurality of locking mechanisms (not shown) for fixing and unlocking the rotation of the operation shaft 26d at arbitrary positions. Although not shown in the drawings, the locking mechanism includes: a locking gear fixed to the operation shaft 26 d; a locking pin for locking the locking gear; a locking spring for energizing the locking pin to the locking gear; a release lever 26c for releasing the locking of the locking pin by pushing the pin of the locking pin; a lever support shaft that rotatably supports the release lever 26 c; a latch release handle for holding or opening the release lever 26c at a latch release position; and a handle support shaft for rotatably supporting the locking release handle.
When the locking mechanism is set to the open position and the lock mechanism is opened, the operation rotating shaft 26d is rotatable, the operation of the one-way clutch is not related to the operation of the operating lever 26a, but the operating lever 26a is rotatable, the opening and closing operation of the operating lever 26a is transmitted to the auxiliary insulating operating lever 24, and the movable grip portion 20 is opened and closed in accordance with the opening and closing operation of the operating lever 26 a. On the other hand, when the locking mechanism is set at the locking position and the locking mechanism is operated, the operation shaft 26d is locked, and the operation lever 26a is rotated only in the closing direction, that is, so as to pull down the auxiliary insulating operation lever 24 by the operation of the one-way clutch, thereby steplessly locking the operation lever 26a at an arbitrary position.
Therefore, when the operator operates the operation lever 26a in the closing direction, the operation lever 26a stops at a position where the operator operates in the closing direction. At the same time, the movable grip portion 20 is locked at a position corresponding to the closed position of the operating lever 26a via the auxiliary insulating operating lever 24. At this time, regardless of the diameter of the electric wire 84 as the object to be gripped, the operator releases his or her hand from the operating lever 26a at the time when it is determined that the object to be gripped with a force suitable for the work, and the operating lever 26a can be directly locked in the above state.
Next, another embodiment of the present invention will be explained.
In the above embodiment, the rain guard 16 is provided in the middle of the insulating operation rod 14, but the rain guard 16 is a structural element for preventing creeping discharge or electric leakage due to rainfall. Therefore, the same structure as the above embodiment can be obtained without providing the rain guard 16 in the insulated operating rod 14 of the above embodiment, and the effects of the present invention can be obtained.
In fig. 4, a case is shown in which the object 84 is an electric wire having a diameter of 2mm to 5mm, but the object 84 is also a plate-like or cloth-like object having a thickness of 2mm to 5mm, and the effects of the present invention can be obtained in the same manner.
As described above, the embodiments of the present invention are disclosed in the above description, but the present invention is not limited thereto.
That is, the embodiments described above may be variously modified in terms of the machine number, shape, material, number, position, arrangement, and the like without departing from the scope of the technical idea and object of the present invention, and these are included in the present invention.
(description of reference numerals)
10: a grip tool for indirect live working; 12: a grip portion; 14: an insulating operating rod; 16: a rain shielding part;
18: a flange; 20: a movable holding portion (opening/closing piece); 20 a: an abutting portion of the movable gripping portion;
20 b: an arm portion of the movable grip portion; 20 c: a hole of the movable holding part; 20 d: base of movable holding part
22: a fixed grip portion (opening/closing piece); 22 a: abutting part for fixing holding part
22 b: an arm portion to which the grip portion is fixed; 22 c: a hole for fixing the holding part;
22 d: a base portion for fixing the holding portion; 22 e: a hole for fixing the holding part;
w: a protrusion provided at the contact portion of the movable holding portion and the contact portion of the fixed holding portion;
20a 1: a plane formed by the ridge lines of the plurality of protrusions W in the contact portion 20a of the movable gripping portion;
22a 1: a plane formed by the ridge lines of the plurality of protrusions W in the contact portion 22a of the fixed grip portion;
θ 1: the angle at which the flat surface 20a1 is inclined from the axial center of the pivot shaft 30 toward the abutment portion 22a side of the opposing fixed gripping portion 22 in the direction of the straight line extending from the ridge line of the ridge W of the movable gripping portion 20 closest to the axial center of the pivot shaft 30;
θ 2: the angle at which the flat surface 22a1 is inclined toward the abutting portion 20a side of the movable gripping portion 20 facing thereto from the axial center of the pivot shaft 30 toward the linear direction in which the ridge line of the protrusion W of the fixed gripping portion 22 closest to the axial center of the pivot shaft 30 extends;
h 1: a spacing in the parallel direction of the protruding strips provided in the abutting portion of the movable gripping portion;
h 2: the interval of the parallel direction of the protruding strips of the abutting part arranged on the fixed holding part;
24: an auxiliary insulating operation rod; 26: a holding operation part; 26 a: an operating lever; 26 b: supporting metal parts
26 c: a release lever; 26 d: a rotating shaft for operation; 26 e: an operation sheet; 28: a spring; 30: pivot shaft
84: an object to be gripped (electric wire).
Claims (2)
1. A gripping tool for indirect hot-line work, comprising:
an insulating operation rod (14) having a length of more than a safe distance between a human body and a holding object (84) which is a linear body, a plate-shaped body or a cloth-shaped body having a diameter or thickness of 2 mm-5 mm;
a grip part (12) which is provided at the axial end of the insulated operating rod (14) and has a movable grip part (20) and a fixed grip part (22) which are brought into contact with or separated from each other by the operation of a grip operating part (26) provided on the insulated operating rod (14);
an insulating auxiliary insulating operation rod (24) for assisting the contact or separation operation of the holding part (12) connected with the front end;
the holding operation part (26) is installed near the base end part of the insulation operation rod (14), is connected with the base end part of the auxiliary insulation operation rod (24) in a rotatable mode, and enables the auxiliary insulation operation rod (24) to reciprocate in the length direction of the auxiliary insulation operation rod (24) by utilizing leverage to operate the holding part (12); and
a pivot (30) for connecting the fixed gripping part (22) and the movable gripping part (20),
the indirect gripping tool for hot-line work is characterized in that,
the movable gripping part (20) and the fixed gripping part (22) of the gripping part (12) are provided with: a base (20 d, 22 d); arm portions (20 b, 22 b) extending substantially upward from the base portions (20 d, 22 d) on a plane including the axial direction of the insulated operating rod (14) and having a substantially arc shape with an outward convex overall shape; abutting portions (20a, 22a) connected to the tips of the arm portions (20 b, 22 b); and pivot holes (20 c, 22 c) through which the pivot shaft (30) passes,
the movable holding part (20) is made of hard material and has the following overall shape: the width of the pivot shaft is gradually increased from the base portion (20 d) of the movable holding portion (20) to the pivot hole (20 c) of the movable holding portion (20) in the direction orthogonal to the axial direction of the pivot shaft (30), and the width of the pivot shaft is gradually decreased from the pivot hole (20 c) of the movable holding portion (20) to the arm portion (20 b) of the movable holding portion (20) to the abutting portion (20a) of the movable holding portion (20),
an arm portion (22 b) of the fixed grip portion (22) has a first curved portion (22b 1), a second curved portion (22b 2), and a third curved portion (22b 3), the first curved portion (22b 1) is connected to a base portion (22 d) of the fixed grip portion (22) substantially upward, the second curved portion (22b 2) is connected from the first curved portion (22b 1) substantially upward and outward smoothly, the third curved portion (22b 3) is connected from the second curved portion (22b 2) substantially upward and inward smoothly, and further, an abutting portion (22a) of the fixed grip portion (22) abutting against the object to be gripped (84) is connected from the third curved portion (22b 3) substantially upward,
a pivot hole (22 c) of the fixed grip part (22) is formed in the first curved part (22b 1), a through hole (22 e) for passing the arm part (20 b) of the movable grip part (20) is formed in the fixed grip part (22), the through hole (22 e) is continuous in a direction orthogonal to the axis of the pivot shaft (30) from the first curved part (22b 1) to the middle of the second curved part (22b 2) and the third curved part (22b 3),
the arm part (20 b) of the movable holding part (20) is formed to be narrow in the axial direction of the pivot shaft (30) by a width substantially equal to the width of the through hole (22 e) formed in the fixed holding part (22) for passing the movable holding part (20),
the arm portion (20 b) of the movable grip portion (20) is formed with a pivot hole (20 c) of the movable grip portion (20) in the vicinity of a base portion (20 d) of the movable grip portion (20), and the movable grip portion (20) is rotatably connected to the first curved portion (22b 1) via the pivot shaft (30) at the pivot hole (20 c) of the movable grip portion (20) and the pivot hole (22 c) of the fixed grip portion (22),
the arm part (20 b) of the movable holding part (20) is provided with a plurality of holes for reducing weight in the axial direction of the pivot shaft (30),
the fixed gripping part (22) is connected with the front end of the insulated operating rod (14) at the base part (22 d) of the fixed gripping part (22),
the movable grip part (20) is rotatably connected to the tip end of the auxiliary insulating operation rod (24) at the base part (20 d) of the movable grip part (20), the movable grip part (20) is rotatably connected to the upper part of the base part (22 d) of the fixed grip part (22) via the pivot shaft (30) near the base end part of the arm part (20 b) of the movable grip part (20), and is rotatable toward the fixed grip part (22) in accordance with the operation of the grip operation part (26),
a plurality of protrusions (W) extending in a direction intersecting the axial direction of the insulated operating rod (14) and in the same direction as the axial direction of the pivot shaft (30) are provided in parallel and in parallel with each other in both the abutting portion (22a) of the fixed gripping portion (22) and the abutting portion (20a) of the movable gripping portion, the plurality of protrusions (W) are provided so as to prevent the gripping object (84) from sliding, and the interval in the parallel direction of the protrusions (W) abutting the gripping object (84) in the abutting portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20) is formed such that: two protrusions (W) are provided on either one of the abutting portions (22a, 20a) abutting against the object (84) to be gripped of the linear body at an interval where there is no possibility of damaging the object (84),
the cross-sectional shape in the parallel direction of the plurality of protrusions (W) at the abutting portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20) is formed in a sine wave shape,
the heights of the plurality of ribs (W) of the fixed holding part (22) and the movable holding part (20) are substantially the same,
the ridge of the ridge (W) of the fixed holding part (22) is opposite to the ridge of the ridge (W) of the movable holding part (20),
the plurality of protrusions (W) at the abutting portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20) are provided at positions where ridge lines at the tips of the plurality of protrusions (W) abut against each other in the direction in which the plurality of protrusions (W) are arranged,
a plane (20a 1) formed by the ridge lines of the plurality of protrusions (W) on the contact portion (20a) of the movable gripping portion (20) is inclined from the axis of the pivot shaft (30) toward the contact portion (22a) side of the fixed gripping portion (22) facing the closest ridge line of the protrusion (W) of the movable gripping portion (20) from the axis of the pivot shaft (30), so that when the gripping object (84) is gripped by the contact portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20), the planes (20a 1, 22a 1) formed by the plurality of protrusions (W) on the contact portions (20a, 22a) of the fixed gripping portion (22) and the movable gripping portion (20) are formed to be substantially parallel, and the gripping object (84) is moved from the fixed gripping portion (22) to the contact portion (22a) of the movable gripping portion (20) to the contact portion (22a), 20a) Only by the mutually offsetting pressure forces, and not by the force moving in the length direction of the contact parts (22a, 20a) of the fixed holding part (22) and the movable holding part (20),
a plane (22a 1) formed by the ridge lines of the plurality of protrusions (W) on the contact portion (22a) of the fixed gripping portion (22) is inclined from the axis of the pivot shaft (30) toward the contact portion (20a) of the movable gripping portion (20) facing away from the axis of the pivot shaft (30) in the direction of a straight line extending from the ridge line of the protrusion (W) of the fixed gripping portion (22) closest to the axis of the pivot shaft (30), so that when the gripping object (84) is gripped by the contact portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20), the planes (20a 1, 22a 1) formed by the plurality of protrusions (W) on the contact portions (20a, 22a) of the fixed gripping portion (22) and the movable gripping portion (20) are formed to be substantially parallel, and the gripping object (84) is moved from the contact portions (22a) of the fixed gripping portion (22) and the movable gripping portion (20) to the gripping portion (20), 20a) Only by the mutually offsetting pressure forces, and not by the force moving in the length direction of the contact parts (22a, 20a) of the fixed holding part (22) and the movable holding part (20),
when the abutting part (22a) of the fixed gripping part (22) and the abutting part (20a) of the movable gripping part (20) are closed, the distal ends of the abutting parts (22d, 20d) of the fixed gripping part (22) and the movable gripping part (20) are abutted against each other, and the apex of the ridge (W) in the abutting part (22a) of the fixed gripping part (22) and the apex of the ridge (W) in the abutting part (20a) of the movable gripping part (20) are configured to be separated toward the respective proximal parts (22d, 20d) of the fixed gripping part (22) and the movable gripping part (20),
the contact portion (22a) of the fixed gripping portion (22) and the contact portion (20a) of the movable gripping portion (20) are configured to grip the gripping object (84) at an interval equal to or close to the diameter and thickness of the gripped gripping object (84) when gripping the gripping object (84).
2. The grip tool for indirect hot-line work according to claim 1,
the interval of the protruding strips (W) in the parallel direction of the abutting portions (22a, 20a) of the fixed gripping portion (22) and the movable gripping portion (20) is 2mm, and there are two protruding strips (W) abutting against the object (84) to be gripped by the linear body on the side of any of the abutting portions (22a, 20a), and there is no possibility that the object (84) to be gripped is damaged.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016107839 | 2016-05-30 | ||
| JP2016-107839 | 2016-05-30 | ||
| PCT/JP2017/019305 WO2017208917A1 (en) | 2016-05-30 | 2017-05-24 | Gripping tool for indirect hot wire construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109075543A CN109075543A (en) | 2018-12-21 |
| CN109075543B true CN109075543B (en) | 2022-05-03 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621413622.8U Active CN206922316U (en) | 2016-05-30 | 2016-12-21 | Indirect live working holding instrument |
| CN201780028429.3A Active CN109075543B (en) | 2016-05-30 | 2017-05-24 | Holding tool for indirect live-wire work |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621413622.8U Active CN206922316U (en) | 2016-05-30 | 2016-12-21 | Indirect live working holding instrument |
Country Status (5)
| Country | Link |
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| JP (1) | JP6791958B2 (en) |
| KR (2) | KR20160004465U (en) |
| CN (2) | CN206922316U (en) |
| TW (1) | TWI729140B (en) |
| WO (1) | WO2017208917A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102654255B1 (en) * | 2018-05-02 | 2024-04-02 | 나가키 세이키 코포레이션 리미티드 | Gripping tool for indirect live wire construction |
| CN108565776A (en) * | 2018-05-15 | 2018-09-21 | 国家电网公司 | A kind of suspension clamp replacement tool |
| CN110601067A (en) * | 2018-06-13 | 2019-12-20 | 国网辽宁省电力有限公司营口供电公司 | Multifunctional bird nest removing rod |
| TWI821395B (en) * | 2018-09-25 | 2023-11-11 | 日商永木精機股份有限公司 | Gripping device for indirect hot-line work |
| KR102022807B1 (en) * | 2018-10-26 | 2019-09-18 | 대원전기 주식회사 | Indirect live wire taping method and Indirect live wires cutting method and Taping machine Removable type Indirect live wire stripper |
| CN109366379A (en) * | 2018-11-28 | 2019-02-22 | 湖南国盛石墨科技有限公司 | A kind of adjustable graphite crucible clamp with self-locking device |
| KR102112471B1 (en) * | 2018-11-30 | 2020-05-19 | 한국전력공사 | Method for hot line work |
| JP7197224B2 (en) * | 2019-06-28 | 2022-12-27 | 株式会社永木精機 | Gripping tool and how to use the gripping tool |
| KR20210049528A (en) | 2019-10-25 | 2021-05-06 | 한국전력공사 | Apparatus for indirectly checking of Power line availability, System for indirectly checking of Power line availability and Driving thereof |
| CN111702786B (en) * | 2020-08-20 | 2020-11-10 | 天津滨电电力工程有限公司 | Special assembled lead wire support of live working robot |
| CN112140022B (en) * | 2020-09-16 | 2022-05-03 | 郑嘉 | Quick locking-unlocking type mechanical tea clamp |
| KR102579044B1 (en) * | 2021-06-23 | 2023-09-18 | 한국전력공사 | Indirect hot line working tool for exchanging shackle and shackle demolition method using thereof |
| KR102552359B1 (en) * | 2022-12-01 | 2023-07-06 | 대원전기 주식회사 | Multi-stage extended multi-function insulated rotor stick for indirect live wire work |
| TWI817880B (en) * | 2022-12-29 | 2023-10-01 | 興富康工業有限公司 | Dismantling tool |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3435212B2 (en) | 1994-04-27 | 2003-08-11 | 中部電力株式会社 | Hot hand |
| JP4185570B2 (en) * | 2005-07-01 | 2008-11-26 | 方仁 濱崎 | Tong |
| JP2010178462A (en) * | 2009-01-28 | 2010-08-12 | Chugoku Electric Power Co Inc:The | Indirect live wire holding tool |
| CN203228133U (en) * | 2013-03-11 | 2013-10-09 | 高宁宁 | Clamp with good self-locking performance |
| JP5897628B2 (en) * | 2014-03-17 | 2016-03-30 | 中国電力株式会社 | Adapter for indirect hot-wire construction |
| TWM482890U (en) * | 2014-03-26 | 2014-07-21 | Run-Ying Hu | Electric insulating elbow type header operating bar |
| CN204947451U (en) * | 2015-05-21 | 2016-01-06 | 国家电网公司 | A kind of novel portable bird's nest scavenge unit |
| CN204967144U (en) * | 2015-10-13 | 2016-01-13 | 国网浙江省电力公司湖州供电公司 | Long -range push -and -pull device of fixing -line device |
-
2016
- 2016-12-07 KR KR2020160007121U patent/KR20160004465U/en not_active Application Discontinuation
- 2016-12-21 CN CN201621413622.8U patent/CN206922316U/en active Active
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2017
- 2017-05-23 TW TW106116989A patent/TWI729140B/en active
- 2017-05-24 CN CN201780028429.3A patent/CN109075543B/en active Active
- 2017-05-24 KR KR1020187033122A patent/KR102334725B1/en active IP Right Grant
- 2017-05-24 WO PCT/JP2017/019305 patent/WO2017208917A1/en active Application Filing
- 2017-05-24 JP JP2018520828A patent/JP6791958B2/en active Active
Also Published As
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| KR102334725B1 (en) | 2021-12-02 |
| TW201801863A (en) | 2018-01-16 |
| JP6791958B2 (en) | 2020-11-25 |
| WO2017208917A1 (en) | 2017-12-07 |
| KR20160004465U (en) | 2016-12-27 |
| JPWO2017208917A1 (en) | 2019-03-28 |
| CN109075543A (en) | 2018-12-21 |
| KR20190013749A (en) | 2019-02-11 |
| TWI729140B (en) | 2021-06-01 |
| CN206922316U (en) | 2018-01-23 |
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