TWI734784B - Gripping device for indirect hot-line work - Google Patents

Abstract

[Question] To provide a holding tool for indirect live wire fortifications that can be held by an insulated operating rod regardless of whether it is a relatively thick wire or a relatively thin wire. [Solution] The holding tool for indirect live wire construction of the present invention is characterized by having an insulated operating rod, a holding part having a movable holding part and a fixed holding part, an auxiliary insulating operating rod and a holding operating part, and the fixed holding part is formed as The front end is divided into two shapes. The movable grip is formed with a curved arc drawn on a plane including the axial direction of the insulated operating rod and abutting on the wire. The fixed grip has a curved surface that is bent at an obtuse angle. The shape of the engaging part can hold either a small diameter or a large diameter wire. When the holding part is in the closed state, a fan-shaped space is formed between the arcuate surface of the movable holding part and the engaging part of the fixed holding part.

Description

Control tool for indirect live line fortifications

Field of invention

The invention relates to a holding tool for indirect live line fortifications. In particular, it relates to a holding tool for indirect live line construction that can indirectly perform live line work on high-voltage power distribution lines in an uninterrupted state, and a holding tool for indirect live line construction that can hold electric wires and the like.

Background of the invention

In the past, there were two methods of direct live line construction and indirect live line construction in the live line operation of high-voltage distribution lines without power failure. The direct live wire construction method is a construction method in which the operator wears protective equipment such as high-voltage rubber gloves and directly touches the high-voltage power distribution line that is energized to carry out the power distribution work. However, there is a risk of electric shock accidents for the operator. On the other hand, the indirect live wire construction method is a construction method in which the operator uses the holding tool for the indirect live wire construction to perform the power distribution construction without directly touching the high-voltage power distribution line that is energized.

Generally speaking, there are holding tools for indirect live wire constructions called insulating pliers and insulating quick pliers (quick) among the holding tools for indirect live wire constructions. These are structures formed so that the tip tool installed on the tip part cannot be replaced. That is, the insulated pliers or insulated quick pliers are 1 It is a special tool for holding wires. Insulation pliers are used to handle relatively thick wires. Insulated quick pliers are used to securely hold relatively thin wires.

Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2013-9546

Patent Document 2: Japanese Patent Laid-Open No. 7-298436

Summary of the invention

In the past, when the operators used these indirect wire construction holding tools to cut the lead-in wires of high-voltage power distribution lines, etc., when there was a possibility of holding wires of multiple diameters, or they did not know the wires In the case of the diameter of the wire, the insulating clamp and the insulating quick clamp must be prepared together to be able to work according to the diameter of the wire to be held. However, the holding tools for indirect live wire fortifications such as insulated pliers and insulated quick pliers are large in size and occupy space. Therefore, when the operator is working in the narrow bucket of the aerial work vehicle, in addition to a plurality of operators, there are indirect activities such as insulated tongs and insulated quick tongs in the bucket. Line fortifications become crowded with holding tools, and there is a problem that it is difficult to work.

The present invention is an invention made to solve such a problem, and its purpose is to provide a way that whether it is a relatively thick wire or a relatively thin wire, it is possible to use a holding tool for indirect threading. Supporting indirect live line fortifications with control tools.

According to claim 1 of the invention, a holding tool for a live wire construction is provided with an insulating insulating operating rod and a holding part, and the insulating operating rod has a length longer than a safe distance between the electric wire and the human body, and the holding The part is installed at the tip of the insulated operating rod and has two switch pieces that can be switched by the operation of the holding operating part provided on the insulated operating rod. The holding tool for indirect live wire construction is characterized by holding The two switch plates of the section are provided with: a fixed grip part, which is formed into a shape in which the tip part is divided into two in a direction crossing the switching direction; and a movable grip part, which allows the tip part to enter the fixed grip when the switch sheet is closed. The movable holding part is formed with two front end parts, the movable holding part is formed with an arc curved surface that draws an arc on a plane including the axial direction of the insulated operating rod and abuts on the electric wire. The fixed holding part is provided with an engaging part, the card The joint part is on the same plane as the arc-shaped curved surface of the movable holding part, and is bent at an obtuse angle into a shape that can hold either a small diameter or a large diameter wire. When the holding part is closed, A fan-shaped space is formed between the arc-curved surface of the movable grip and the engaging portion of the fixed grip.

According to Claim 2 of the present invention, the gripping tool for interlocking construction is characterized in that the fixed grip portion is provided with a recess in the width direction.

According to Claim 3 of the present invention, the gripping tool for interlocking construction is characterized in that the substantially central portion of the movable grip portion is provided with a recess in the width direction.

In this invention, the gripping tool for indirect live wire construction, in the engagement part of the fixed grip part that is bent at an obtuse angle, the bending angle is preferably 105°~120 Spend.

In this invention, the gripping tool for the indirect line construction should preferably have the radius of curvature of the arc curved surface of the movable grip part about 1.5 times to about 3 times of 15 mm.

The arc curved surface of the movable grip portion is a curved surface that extends across the bisector of the angle formed by the engagement portion of the fixed grip portion, and is convex in the opposite direction to the projection of the bent portion of the engagement portion of the fixed grip portion The arc-shaped curved surface.

The arc curved surface of the movable holding part of the holding tool for indirect articulated construction of this invention should preferably be formed so that the center of curvature is perpendicular to the straight line connecting the base of the movable holding part and the base end side of the central part from the base of the central part. The straight line extending from the end side becomes more inside.

According to the invention of claim 1, when the fixed holding part and the movable holding part are placed in contact or crossing positions, the engagement part of the fixed holding part formed at an obtuse angle and the arc curved surface of the movable holding part meet Form a fan-shaped space. When the linear body used for gripping is put into this fan-shaped space, the operator operates the gripping operation part and closes the gripping part, and the linear body is moved from the engaging part of the fixed gripping part to the movable gripping The arc surface of the part is subjected to opposing pressure.

According to the invention of claim 2, the fixed holding part can maintain its strength while being lighter in weight. In this way, the weight of the holding tool for indirect live line construction can be reduced.

According to the invention of claim 3, the movable grip part can maintain its strength while being lighter in weight. In this way, the weight of the holding tool for indirect live line construction can be reduced.

By the invention of claim 1 indirectly connected to the fortifications control The tool can hold linear objects with a diameter of 5mm~30mm.

According to the invention of Claim 2 with the holding tool for indirect thread construction, it is possible to hold a linear body with a diameter of 5mm to 30mm, and the weight of the holding tool for indirect thread construction can be reduced.

With the invention of Claim 3, the gripping tool for indirect threading constructions can hold linear bodies with a diameter of 5mm to 30mm, and the weight of the gripping tool for indirect threading constructions can be reduced.

Therefore, the operator only needs to carry a holding tool for the indirect live wire construction of the present invention to the work site of the indirect live wire construction, and it becomes unnecessary to carry both the insulated pliers and the insulated quick pliers. Moreover, as long as the holding tool for indirect live line fortifications can be lightened in weight, the operator can easily position the holding tool for indirect live line fortifications to the target position.

The above-mentioned objects, other objects, features, and advantages of the present invention will become clearer in the description of the mode for implementing the following invention by referring to the drawings.

10: Control tools for indirect live line fortifications

12: Control Department

14: Insulated operating rod

16: rain block

18: Guardian

20: Movable grip (switch piece)

20a: The front end of the movable grip

20b: The central part of the movable grip

20c: The base end of the central part of the movable grip

20d: The base of the movable grip

22: Fixed holding part (switch piece)

22a: The base of the fixed grip

22b1: The first straight part of the fixed grip

22b2: The second straight part of the fixed grip

22b3: The third straight part of the fixed grip

222b1: The first contact surface of the fixed grip

222b2: The second abutment surface of the fixed grip

222b3: The third contact surface of the fixed grip

24: Auxiliary insulated operating rod

26: Control the operation part

26a: Joystick

26b: Supporting metal parts

26c: release lever

26d: Rotating shaft for operation

26e: Actuator

28: Spring

30: pivot

84: Wire

200r: The arc surface of the movable holding part

B: Arrow

C: The clamping part of the fixed holding part

D: The bisector of the bending angle between the second abutting surface and the third abutting surface of the fixed grip

L1: A straight line connecting the base of the movable grip and the base of the center

L2: A straight line orthogonal to L1 and a straight line extending from the base end of the central part of the movable grip

V: virtual plane

W: protrusion

Fig. 1 is a front diagrammatic view showing a holding tool for indirect live line construction of the present invention.

Fig. 2A(A) is an enlarged perspective view of the vicinity of the grip portion as seen from the movable grip portion side of the grip tool for indirect thread construction.

Fig. 2B(B) is an enlarged perspective view of the vicinity of the grip as seen from the side of the fixed grip of the grip tool for indirect thread construction.

Figure 2C(C) is an enlarged left side view of the vicinity of the gripping part of the gripping tool for indirect thread fortifications, (D) is the gripping tool for indirect thread fortifications Enlarged right side view near the part.

Fig. 3A(A) is a front view of the fixed grip.

Fig. 3B(B) is a left side view of the fixed grip portion, and (C) is a right side view of the fixed grip portion.

Fig. 3C(D) is a front view of the movable grip, (E) is a left side view of the movable grip, and (F) is a right side view of the movable grip.

Fig. 4A is an enlarged front diagrammatic view of the vicinity of the gripping portion in a state where the gripping tool for indirect thread construction holds a thin wire (about 5 mm in diameter).

Fig. 4B is an enlarged front diagrammatic view of the vicinity of the gripping portion in a state where the gripping tool for indirect threading works grips a thick wire (about 30 mm in diameter).

Fig. 5 is a front view of a movable grip part in a grip tool for indirect thread construction according to another embodiment of the present invention.

Fig. 6A is an enlarged front diagrammatic view of the vicinity of the gripping part in a state where the gripping tool for indirect live wire construction of another embodiment of the present invention grips a thin wire (about 5 mm in diameter).

Fig. 6B is an enlarged front diagrammatic view of the vicinity of the gripping portion in a state where the gripping tool for indirect threading works grips a thick wire (about 30 mm in diameter) in another embodiment of the present invention.

The form used to implement the invention

The gripping tool for indirect live line construction of the embodiment of the present invention will be explained based on the drawings. Below, the length direction of the insulated operating rod 14 is defined as The vertical direction, and the direction away from the center axis of the insulated operating rod 14 is defined as the outer direction. In addition, the embodiment shown below is only an example of realizing the present invention, and is not intended to limit the technical scope of the present invention.

The holding tool 10 for indirect live line construction shown in FIG. 1 has: a holding part 12, an insulating operating rod 14 with a holding part 12 attached to the tip part, and an auxiliary insulating operation for transferring operations performed by the holding operating part 26 to the holding part 12 The rod 24 and the gripping operation part 26 provided near the base end of the insulating operation rod 14. The grip operation part 26 operates the contact and separation action of the grip part 12. Hereinafter, each component will be described in detail.

The insulating operating rod 14 is a cylindrical rod-shaped member made of an insulating material. Since the holding tool 10 for indirect live wire construction is a tool used for cutting the lead-in wire of a high-voltage power distribution line, etc., the insulated operating rod 14 has a length longer than a safe distance between the wire and the human body. In order to avoid creeping discharge and electric leakage, a rain shield 16 and a protective edge 18 are provided on the insulating operating rod 14. As described above, the gripping portion 12 is attached to the tip portion, and the gripping operation portion 26 is provided near the base end portion. The operator will use this insulated operating rod 14 to position the gripping portion 12 installed at the front end to the working position, and use the gripping operating portion 26 to perform contact and separation operations of the gripping portion 12.

The auxiliary insulating operating rod 24 is made of the same material as the insulating operating rod 14 and, like the insulating operating rod 14, a rain shield 16 is provided in order to prevent leakage and creeping discharge. The tip portion of the auxiliary insulating operating rod 24 is rotatably connected to the base portion 20d of the movable grip portion 20 described later. The base end of the auxiliary insulated operating rod 24 is connected to the gripping operating portion 26 described later. The operating piece 26e is rotatably connected. The auxiliary insulating operating rod 24 assists the contact and separation operation performed by the holding operating part 26 of the holding part 12 that has been installed at the front end of the insulating operating rod 14.

The grasping portion 12 has a movable grasping portion 20 and a fixed grasping portion 22. The fixed grip portion 22 has a base portion 22a, a first linear portion 22b1, a second linear portion 22b2, and a third linear portion 22b3.

The fixed grip 22 is formed of a hard material, for example, a metal material. The base portion 22a of the fixed grip portion 22 is fitted and fixed to the tip portion of the insulated operating rod 14. As shown in (A) of FIG. 3A, a first linear portion 22b1 extending substantially linearly with an angle of approximately 30 degrees upward and outward with respect to the longitudinal direction of the insulating operating rod 14 is formed from the base portion 22a. Here, the outward direction refers to a direction opposite to the direction in which the movable grip portion 20 and the fixed grip portion 22 face, and is a direction that intersects the central axis of the insulated operating rod 14. In addition, a second straight portion 22b2 which is continued to this first straight portion 22b1 and extends at an angle of approximately 17 degrees to the outside is formed. In addition, a third straight portion 22b3 which is continued to this second straight portion 22b2 and bent upward and inward with an angle of 75 to 60 degrees is formed. Here, the inward direction refers to the direction in which the movable grip portion 20 and the fixed grip portion 22 face each other, and is a direction intersecting the central axis of the insulated operating rod 14. The central portion base end side 20c of the movable grip portion 20 is rotatably connected to the upper portion of the base portion 22a of the fixed grip portion 22 through the pivot 30 to the connecting portion of the first linear portion 22b1 and the second linear portion 22b2 .

A first contact surface 222b1 is formed inside the first linear portion 22b1. The first abutting surface 222b1 is the plane V shown in FIG. 2 (the plane V is A plane including the axial direction of the insulated operating rod 14 and the longitudinal direction of each straight portion 22b1, 22b2, 22b3. (Hereinafter referred to as "virtual plane V") is orthogonal and includes a plane in the longitudinal direction of the first linear portion 22b1.

The plane after extending the first contact surface 222b1 crosses the axis of the insulating operating rod 14.

Similarly, a second contact surface 222b2 is formed inside the second linear portion 22b2. The second contact surface 222b2 is orthogonal to the virtual plane V and is a plane including the longitudinal direction of the second linear portion 22b2. The plane after extending the second contact surface 222b2 crosses the axis of the insulating operating rod 14.

Similarly, a third contact surface 222b3 is formed inside the third linear portion 22b3. The third contact surface 222b3 is a plane orthogonal to the virtual plane V and including the longitudinal direction of the third linear portion 22b3. The plane on which the third contact surface 222b3 is extended crosses the axis of the insulated operating rod 14.

Let the bending part of the 2nd contact surface 222b2 and the 3rd contact surface 222b3 be the engagement part C. As shown in FIG.

Let D be the bisector of the bending angle between the second abutting surface 222b2 and the third abutting surface 222b3.

The angle formed by the second contact surface 222b2 on the inner side of the second linear portion 22b2 and the third contact surface 222b3 on the inner side of the third linear portion 22b3 becomes an angle of 105 degrees to 120 degrees.

The wire 84 can be locked on the engaging portion C that is a bent portion between the second abutting surface 222b2 and the third abutting surface 222b3.

In addition, the third linear portion 22b3 is formed into a shape divided into two, and the tip portion 20a of the movable grip portion 20 can be rotated to enter the divided portion. It is a shape between the two third straight portions 22b3. The tip of the third linear portion 22b3 is formed thinner than the second linear portion 22b2 in the plane direction of the virtual plane V. Thereby, it is possible to reduce the weight of the fixed grip portion 22, that is, to reduce the weight of the grip tool 10 for indirect thread construction.

The first linear portion 22b1 and the second linear portion 22b2 of the fixed grip portion 22 are provided with recesses in the orthogonal direction of the virtual plane V. As shown in FIG. Thereby, it is possible to reduce the weight of the fixed grip portion 22, that is, to reduce the weight of the grip tool 10 for indirect thread construction.

The second abutting surface 222b2 and the third abutting surface 222b3 of the fixed holding portion 22 are provided with a plurality of protrusions W. The protrusions W extend in a direction orthogonal to the virtual plane V and are used when the wire 84 is gripped. The electric wire 84 exerts an anti-slip function. Therefore, by extending the protrusion W in the axial direction of the electric wire 84, the holding tool 10 for indirect live wire construction can reliably hold the electric wire 84 on the holding portion 12 without sliding it.

The movable grip portion 20 has a front end portion 20a, a center portion 20b, a center portion proximal side 20c, and a base portion 20d.

The movable grip portion 20 and the fixed grip portion 22 are similarly formed of a hard material, for example, a metal material. The overall shape of the movable holding portion 20 is as follows: On the virtual plane V, the projections toward the bent portion (engagement portion C) of the second abutting surface 222b2 and the third abutting surface 222b3 of the fixed holding portion 22 are drawn A roughly arc-shaped or crescent-shaped curve protruding in the opposite direction. In particular, on the inner side of the movable grip portion 20, an arc curved surface 200r that is orthogonal to the virtual plane V and draws an arc on the virtual plane V is formed. The arc curved surface 200r is a contact surface that abuts on the electric wire 84, and is formed in a concave shape. Curvature of arc surface 200r The radius is about 1.5 times to about 3 times the larger radius (about 15 mm) of the wire 84 of the object to be grasped.

The arc curved surface 200r is a curved surface that extends across the bisector D of the angle formed by the second abutting surface 222b2 and the third abutting surface 222b3 of the fixed holding portion 22, and is in contact with the second abutting portion of the fixed holding portion 22 The projections of the bent portions of the surface 222b2 and the third abutting surface 222b3 are arc-shaped curved surfaces that bulge in opposite directions. The arc curved surface 200r has its center of curvature formed so as to be more inside than a straight line L2 extending at right angles from the central base end side 20c with respect to the straight line L1 connecting the base 20d of the movable holding section 20 and the central base end side 20c. . The base end side 20c of the central portion of the movable grip portion 20 is rotatably connected to the upper portion of the base portion 22a of the fixed grip portion 22 through the pivot 30 and is the connecting portion of the first linear portion 22b1 and the second linear portion 22b2. . In addition, the base portion 20 d of the movable grip portion 20 is rotatably connected to the tip portion of the auxiliary insulating operating rod 24.

Thereby, in response to the movement of the operating lever 26a of the gripping operating portion 26, the movable gripping portion 20 can be rotated in the arrow B direction with the pivot 30 as the center. In particular, when the movable grip portion 20 approaches the fixed grip portion 22, the front end portion 20a of the movable grip portion 20 can enter between the two divided third straight portions 22b3 of the fixed grip portion 22.

The shape of the front end portion 20 a of the movable grip portion 20 in the plane direction of the virtual plane V is formed to be thinner than the central portion 20 b of the movable grip portion 20. Thereby, it is possible to reduce the weight of the movable grip portion 20, that is, to reduce the weight of the grip tool 10 for indirect thread construction.

The central portion 20b of the movable grip portion 20 is in the orthogonal direction of the virtual plane V A depression is provided on the upper surface. Thereby, it is possible to reduce the weight of the movable grip portion 20, that is, to reduce the weight of the grip tool 10 for indirect thread construction.

The arc curved surface 200r of the abutting surface of the movable holding portion 20 that abuts the electric wire 84 is provided with a plurality of protrusions W in the direction orthogonal to the virtual plane V. The protrusions W are used when the electric wire 84 is gripped. The electric wire 84 exerts an anti-slip function. Therefore, by extending the protrusion W in the axial direction of the electric wire 84, the holding tool 10 for indirect live wire construction can reliably hold the electric wire 84 on the holding portion 12 without sliding it.

The grip operation part 26 is provided near the base end of the insulated operation rod 14, and has an operation lever 26a, a supporting metal fitting 26b, a release lever 26c, an operation rotating shaft 26d, and an operating piece 26e. On the supporting metal fitting 26b, the operating rod 26a is pivotally supported by the operating rotating shaft 26d. The operating piece 26e protruding to the same side as the operating rod 26a is rotatably connected to the base end of the auxiliary insulating operating rod 24. Therefore, when the operator performs an operation to hold the operating rod 26a, the auxiliary insulating operating rod 24 is pulled down by the action of a lever, and the movable holding portion 20 of the holding portion 12 is moved to close toward the fixed holding portion 22. Therefore, the holding tool 10 for indirect live thread construction can securely hold the wire 84 on the holding portion 12 without sliding it.

In addition, a spring 28 that applies potential energy in a direction to open the operation lever 26a is installed between the support metal fitting 26b and the operation lever 26a. With the spring 28, when the operator does not operate the operating lever 26a, the operating lever 26a is opened. Accompanying this situation, the movable grip portion 20 may be maintained in an open state away from the fixed grip portion 22.

Equipped with a locking machine on the aforementioned supporting metal part 26b Since this locking mechanism is a conventional mechanism that has been shown in detail in the aforementioned Patent Document 2, it will be briefly described below. The aforementioned locking mechanism is provided with: a bearing-shaped one-way clutch (not shown) using a roller (not shown) installed at the fulcrum position of the lever of the operating lever 26a, and a rotating shaft for operating the one-way clutch. 26d. A plurality of locking mechanisms (not shown) for the rotation of the rotating shaft 26d for this operation are fixed and opened at any position. Although the illustration is omitted, this locking mechanism is equipped with a locking gear fixed to the operating rotating shaft 26d, a locking pin for locking the locking gear, and a locking pin that applies potential energy to the direction of the locking gear. The locking spring, the release lever 26c that pushes the pin of the locking pin up to release the locking of the locking pin, the lever support shaft that rotatably supports the release lever 26c, and the release lever 26c is held in the unlocked position Or an open lock release knob, and a knob support shaft that rotatably supports the lock release knob.

In addition, when the locking mechanism is set to the open position and the locking mechanism is opened, the operating rotating shaft 26d can be rotated freely, and the function of the one-way clutch becomes irrelevant to the operation of the operating lever 26a The operating lever 26a is rotated freely, the switching operation of the operating lever 26a is transmitted to the auxiliary insulating operating rod 24, and the movable grip 20 is opened and closed in response to the switching operation of the operating lever 26a. On the other hand, when the locking mechanism is set to the locking position and the locking mechanism is activated, the operating rotating shaft 26d will be locked, and the one-way clutch will cause the operating lever 26a to only face It rotates in the closing direction (that is, the state of pulling the auxiliary insulating operating rod 24 downward), and the operating rod 26a can be locked at any position in a non-segmented manner.

Therefore, when the operator operates the operating lever 26a in the closing direction, the operating lever 26a stops at the position operated by the operator in the closing direction. At the same time, the movable holding portion 20 passes through the auxiliary insulated operating rod 24 to be locked at a position corresponding to the closed position of the operating rod 26a. At this time, regardless of the size of the diameter of the wire 84 of the object to be grasped, as long as the operator determines that the object can be grasped with a force suitable for the work, the hand is released from the operating lever 26a, That is, it can be formed that the operating lever 26a is locked in this state.

Next, based on FIG. 4, the use state of the gripping tool 10 for the indirect live wire construction of the present invention to grip the electric wire 84 will be described. The operator grasps the base end of the insulated operating rod 14 and moves the entire holding tool 10 for indirect live wire construction, so that the holding portion 12 that is energized by the spring 28 and turned into an open state approaches the wire 84 to be held. The target location. When the gripping portion 12 reaches the target position of the electric wire 84, the operator can apply a grip force to the operating lever 26a of the gripping portion 26 in the closing direction. Thereby, the arc curved surface 200r of the movable grip portion 20 abuts on the electric wire 84, and the electric wire 84 is gradually pressed toward the engagement portion C of the fixed grip portion 22.

When the electric wire 84 has a small diameter (about 5 mm in diameter), as shown in FIG. 4A, the front end portion 20a of the movable grip portion 20 will penetrate into the fixed grip portion 22 divided into two third straight portions Between 22b3. At this time, the electric wire 84 abuts on the arc curved surface 200r on the bisector D of the bending angle between the second abutting surface 222b2 and the third abutting surface 222b3 or above D. Thereby, the second contact surface 222b2 and the arc-shaped curved surface 200r in the vicinity of the central portion 20b of the movable grip portion 20 are in an opposing relationship. Accordingly, wire 84 In the vicinity of the engaging portion C of the fixed grip portion 22, the arc curved surface 200r near the center portion 20b of the second contact surface 222b2 and the movable grip portion 20 receives strong pressure and is firmly gripped.

When the wire 84 has a large diameter (about 30 mm in diameter), as shown in FIG. 4B, the front end portion 20a of the movable grip portion 20 does not enter between the third straight portion 22b3 of the fixed grip portion 22, and It is located at a position slightly away from the third linear portion 22b3 of the fixed grip portion 22. At this time, the electric wire 84 is in contact with the circular arc surface 200r below the bisector D of the bending angle between the second contact surface 222b2 and the third contact surface 222b3. Thereby, the 3rd contact surface 222b3 and the circular arc surface 200r of the vicinity of the center part 20b of the movable holding part 20 will become an opposing relationship. Thereby, the electric wire 84 receives a strong pressure from the third contact surface 222b3 and the arc curved surface 200r near the central portion 20b of the movable grip 20 near the engagement portion C of the fixed grip 22, thereby firmly Be controlled.

Next, when the bending angle of the engaging part C of the fixed grip part 22 is small, the case where the effect of this invention cannot be exhibited is demonstrated. The angle of the engagement portion C of the bent portion of the second abutting surface 222b2 and the third abutting surface 222b3 of the fixed grip 22 is extremely small compared to 105°~120°, a larger diameter wire 84 may not be firmly grasped by the fixed grasping portion 22 and the movable grasping portion 20. The reason is that the third contact surface 222b3 of the fixed grip 22 and the arc curved surface 200r near the central portion 20b of the movable grip 20 are not opposed to each other, or the electric wire 84 cannot be accommodated in the second of the fixed grip 22 2 Between the contact surface 222b2 and the third contact surface 222b3, the wire 84 cannot be pressed to the extent that it can be grasped force. This may also be related to the situation where the wire 84 falls off from the holding tool 10 for indirect live wire fortifications.

In addition, a case where the effect of the present invention cannot be exhibited when the bending angle of the engagement portion C of the fixed grip portion 22 is large will be described. The angle of the engagement portion C of the bent portion between the second abutting surface 222b2 and the third abutting surface 222b3 of the fixed grip 22 is extremely large compared to 105°~120°, a smaller diameter wire 84 may not be firmly grasped by the fixed grasping portion 22 and the movable grasping portion 20. The reason is that the second contact surface 222b2 of the fixed grip portion 22 and the arc curved surface 200r near the center portion 20b of the movable grip portion 20 are not opposed to each other, or the front end portion 20a of the movable grip portion 20 and the fixed grip portion 20 are not opposed to each other. The base portion of the third linear portion 22b3 divided into two of 22 (the dotted portion above the engagement portion C in FIGS. 4A and 4B) interferes, and the movable grip portion 20 and the fixed grip portion cannot be sufficiently made 22 is close, so the wire 84 cannot be pressed to the extent that it can be held.

This invention is not limited to the foregoing embodiment, and various changes can be made based on the idea of this invention. Hereinafter, other embodiments of the present invention will be described. In the foregoing embodiment, the rain shield 16 is provided at approximately the middle of the insulating operating rod 14, and the rain shield 16 is a component used to prevent creeping discharge and electric leakage caused by rain. Therefore, even if the insulating operating rod 14 in the foregoing embodiment is configured to not provide the rain shield 16, the effect of the present invention can be obtained in the same manner as in the foregoing embodiment.

In addition, as another embodiment of the present invention, there is a holding tool 10 for an indirect link construction as shown in FIGS. 5, 6A, and 6B. here In the embodiment, the front end portion 20a of the movable grip portion 20 is formed on the outer side than the straight line L2, and the straight line L2 is at right angles to the straight line L1 connecting the base portion 20d of the movable grip portion 20 and the base end side 20c of the central portion. A straight line extending from the base end side 20c of the central portion. Thereby, when the grip 12 is in the open state, the front end 20a of the movable grip 20 and the front end of the third straight portion 22b3 of the fixed grip 22 are further apart. Therefore, the operator can easily pull the relatively thick electric wire 84 into the grip 12. In this embodiment, as shown in FIG. 6A and FIG. 6B, since the holding tool 10 for indirect live wire construction can hold relatively thin wires (about 5mm in diameter), it can also hold relatively thick wires (about 30mm in diameter). Therefore, the effects of the present invention can be obtained.

As described above, although the embodiments of the present invention have been disclosed in the foregoing description, the present invention is not limited to these.

That is, to the embodiments described above, various changes can be added to the mechanism, shape, material, number, position, or arrangement within the scope not departing from the technical idea and purpose of the present invention, and they are all included in In the present invention.

10‧‧‧Handling tools for indirect live line fortifications

12‧‧‧Control Department

14‧‧‧Insulated operating rod

16‧‧‧Rain block

18‧‧‧Guardian

20‧‧‧Movable grip (switch piece)

20a‧‧‧Front end of movable grip

20b‧‧‧The central part of the movable handle

20c‧‧‧The base end of the central part of the movable grip

20d‧‧‧The base of the movable handle

22‧‧‧Fixed grip (switch piece)

22a‧‧‧The base of the fixed grip

22b1‧‧‧The first straight part of the fixed grip

22b2‧‧‧The second straight part of the fixed grip

22b3‧‧‧The third straight part of the fixed grip

222b1‧‧‧The first contact surface of the fixed grip

222b2‧‧‧The second abutment surface of the fixed grip

222b3‧‧‧The third contact surface of the fixed grip

24‧‧‧Auxiliary insulated operating rod

26‧‧‧Control the operation part

26a‧‧‧Operating lever

26b‧‧‧Supporting metal parts

26c‧‧‧Release lever

26d‧‧‧Rotating shaft for operation

26e‧‧‧ Actuator

28‧‧‧Spring

30‧‧‧Pivot

200r‧‧‧The arc surface of the movable holding part

B‧‧‧Arrow

C‧‧‧The clamping part of the fixed holding part

Claims (3)

A holding tool for indirect live wire construction, comprising: an insulating insulating operating rod having a length longer than a safe distance between the wire and the human body; and a holding part installed at the front end of the aforementioned insulating operating rod, In addition, it has two switch pieces that can be switched by the operation of the gripping operation part provided on the insulating operating rod. The gripping tool for indirect live wire construction is characterized in that the two switch pieces of the gripping part have: The fixed grip portion is formed into a shape in which the tip portion is divided into two in the direction crossing the switch direction; and the movable grip portion, the tip portion can enter the fixed grip portion when the switch sheet is closed. The front end portion of the fixed grip portion has a base, a first straight portion, a second straight portion, and a third straight portion. The longitudinal direction of the insulated operating rod is provided with an angle of approximately 30 degrees upward and outward, and the first linear portion extending substantially linearly. The aforementioned outward direction refers to the direction opposite to the direction in which the movable grip portion and the fixed grip portion face. It is a direction intersecting the central axis of the insulated operating rod, and a second straight portion extending from the first straight portion to the outside with an angle of approximately 17 degrees is formed, and the second straight portion is formed to continue to this second straight portion Partially upward and inwardly The third straight part bent at an angle of 75 degrees to 60 degrees. The aforementioned inward direction refers to the direction in which the movable holding part and the fixed holding part face each other, and is the direction intersecting the central axis of the insulated operating rod. The base end side of the central part is rotatably connected to the upper part of the base part of the fixed grip part through a pivot, and is connected to the first linear part and the second linear part. A first linear part is formed on the inner side of the first linear part. The abutting surface, the first abutting surface is orthogonal to a virtual plane including the axial direction of the insulating operating rod and the longitudinal direction of each linear portion, and is a plane including the longitudinal direction of the first linear portion, and the first abutting surface The extended plane will cross the axis of the insulated operating rod, and a second abutting surface is formed inside the second straight portion. The second abutting surface is orthogonal to the aforementioned virtual plane and includes the length of the second straight portion. The plane of the direction, the plane extending the second abutting surface will cross the axis of the insulating operating rod, and a third abutting surface is formed inside the third straight portion, and the third abutting surface is orthogonal to the aforementioned virtual plane , And is a plane that includes the length direction of the third straight portion. The plane after extending the third abutting surface crosses the axis of the insulating operating rod. There is an engaging part, the angle formed by the second abutting surface inside the second straight part and the third abutting surface inside the third straight part is an angle of 105°~120°, which can lock the wire On the engagement portion, which is the bending portion of the second abutting surface and the third abutting surface, the third straight portion is formed into a shape that is divided into two, and it can be used The front end of the movable grip part rotates to enter the shape between the two divided third straight parts. The front end of the third straight part is formed thinner than the second straight part in the plane direction of the virtual plane. , The second abutment surface and the third abutment surface of the fixed grip portion are provided with a plurality of protrusions. The protrusions extend in a direction orthogonal to the virtual plane and prevent slippage of the wire when the wire is gripped. Function, the aforementioned protrusions extend in the axial direction of the wire, the movable holding part has a front end, a central part, a base end side of the central part, and a base. The movable holding part and the fixed holding part are similarly formed of a hard material, and the movable holding part The overall shape is as follows: On the aforementioned virtual plane, draw a substantially arc-shaped or crescent-shaped curve, and the substantially circular-arc or crescent-shaped curve is directed toward the second abutting surface and the third abutting surface of the fixed holding portion The bending part of the joint, that is, the projection of the engaging part, is convex in the opposite direction. Inside the movable holding part, there is formed a circular arc surface orthogonal to the virtual plane and drawing an arc on the virtual plane. The circular arc surface is The contact surface that is in contact with the wire is formed into a concave shape. The radius of curvature of the arc curved surface is about 1.5 to 3 times the larger radius of the wire to be gripped. The arc curved surface extends across the fixed grip. The curved surface of the bisector of the angle formed by the second abutting surface and the third abutting surface of the part, and is opposite to the projection of the bent portion of the second abutting surface and the third abutting surface of the fixed holding part Curved curved surface with convex direction, The arc curved surface is formed by forming its center of curvature to be more inside than a straight line extending from the base end side of the central part at right angles to the straight line connecting the base of the movable grip and the base end of the central part, and the base of the central part of the movable grip The side is rotatably connected to the upper part of the base part of the fixed grip part and connected to the first straight part and the second straight part through a pivot. The base part of the movable grip part is the tip part of the auxiliary insulating operating rod. Rotatable connection. In response to the movement of the operating lever of the gripping operation section, the movable gripping section becomes pivotable. When the movable gripping section approaches the fixed gripping section, the front end of the movable gripping section enters Between the two-divided third straight portion of the fixed grip, the shape of the front end of the movable grip is thinner than the central part of the movable grip in the plane direction of the virtual plane. The arc curved surface of the abutting surface that abuts the wire will be provided with a plurality of protrusions in the direction orthogonal to the virtual plane. The electric wire extends in the axial direction, the arc curved surface of the movable holding portion is formed with an arc curved surface that draws an arc on a plane including the axial direction of the insulated operating rod, and the arc curved surface abuts on the wire, and the fixed holding portion is provided with an engaging portion , The engaging portion is bent at an obtuse angle on the same plane as the arc-shaped curved surface of the movable holding portion to be able to hold a small-diameter or large-diameter wire, When the grasping portion is in the closed state, a fan-shaped space is formed between the arcuate curved surface of the movable grasping portion and the engaging portion of the fixed grasping portion. For example, in Claim 1, a gripping tool for a live line fortification, wherein the fixed gripping portion is provided with a recess in the width direction. For example, in Claim 1, a gripping tool for a live line construction, wherein the substantially central portion of the movable gripping portion is provided with a recess in the width direction.

Images