KR102499968B1 - Wire gripper and live wire distribution tool using it - Google Patents

Abstract

Provided is a wire gripper (2) capable of preventing damage to a coating member of an aluminum wire when an aluminum wire (W) is grabbed and pulled to a cutting site (CT), and a live wire distributing tool (1) using the same. The wire gripper includes a receiver 4 having a fitting groove 4a formed on the lower surface, a cam member 5, a gap adjustment unit 6 for adjusting the gap between the cam member and the receiver, and the wire gripper by cutting aluminum wires. It is provided with a connecting portion 7 that can freely swing in the vertical direction with respect to the tensioning tool 3 that is pulled in a direction closer to the place. The receiving groove 4a has a V-shaped cross section at the first end portion 4a1 closer to the cutting place and a semicircular cross section at the second end portion 4a2 farther from the cutting place. have Further, the fitting groove, in at least a part of the fitting groove including the second end on the far side from the cutting place, has a semicircular shape from the V-shaped cross section as it approaches the second end on the far side along the fitting groove. It has a cross-section changing portion 4c that gradually changes to the cross-section of .

Description

Wire gripper and live wire distribution tool using it

) 및 그것을 이용한 활선 배분(sorting) 공구에 관한 것이다. 더욱 자세하게는, 알루미늄 전선을 잡고 절단 장소로 끌어당겼을 때 알루미늄 전선의 피복 부재의 손상을 방지하는 것이 가능한 와이어 그리퍼 및 그것을 이용한 활선 배분 공구에 관한 것이다.The present invention is a wire gripper (

) and a live line sorting tool using it. More specifically, it relates to a wire gripper capable of preventing damage to a coating member of an aluminum wire when the aluminum wire is pulled to a cutting place and a live wire distribution tool using the same.

Conventionally, in order to cut an energized electric wire (hereinafter referred to as a live wire) suspended in the air, such as between telephone poles, at a desired location, both sides of the cut location in the electric wire are held by a pair of wire grippers, respectively. , By bringing these pair of wire grippers closer to each other (approaching) using a tensioning tool such as a telescoping bar, it is possible to bend and cut the electric wire in the vicinity of the cutting place.

, wire gripping body)와 하측 와이어 그리핑체를 구비하고 있다. 상측 와이어 그리핑체와 하측 와이어 그리핑체의 대향면에는, 각각 반원형 단면(斷面)의 홈이 형성되어 있다. 상측 와이어 그리핑체를 베이스부 등에 고정한 상태에서, 하측 와이어 그리핑체를 위쪽으로 이동시키는 것에 의해, 상측 와이어 그리핑체 및 하측 와이어 그리핑체 각각의 홈에 끼워맞춘 상태에서 전선을 잡을 수가 있다.A conventional wire gripper, as described in Patent Literature 1, for example, is a part that clamps (clamps) an electric wire vertically, and has an upper wire gripping body (

, wire gripping body) and a lower wire gripping body. On the opposing surfaces of the upper and lower wire gripping bodies, grooves having a semicircular cross section are formed, respectively. With the upper wire gripping body fixed to the base, etc., by moving the lower wire gripping body upward, it is possible to grip the electric wire in a state where it fits into the respective grooves of the upper and lower wire gripping bodies. .

In such a wire gripper, protrusions (so-called spikes) are usually provided in grooves of the upper and lower wire gripping bodies so that the wire does not slip when the wire is gripped and pulled toward the cutting place. By digging the wire into the spike, it is preventing the wire from slipping axially as it is gripped and pulled toward the cut site.

Among various electric wires, the most popular copper wire has a structure in which a copper wire is coated with a covering member. When gripping such a copper wire with a wire gripper, slipping when the copper wire is pulled can be reliably prevented by the spike penetrating into the copper wire inside the covering member.

On the other hand, an electric wire (hereinafter referred to as an aluminum wire) having a wire rod made of aluminum, which has been popularized in recent years, is cheaper than a copper wire and has an advantage of being lightweight, but when a spike penetrates an aluminum wire rod, it is lighter than a copper wire. It is easily damaged, and there is a possibility that an electrical effect, such as an increase in electrical resistance or a spark, may occur. Therefore, wire grippers having spikes cannot be used to grip aluminum wires.

Conventionally, in order to hold the aluminum wires without spikes, grooves of a semicircular cross section that closely contact the outer circumferential surfaces of the aluminum wires are formed on the opposite surfaces of the upper and lower wire gripping bodies to the upper wire gripping body. It was formed over the entire length of the leafing body and the lower wire gripping body.

However, when the aluminum wire is pulled from both sides to the cutting place and bent upward, the upper portion of the aluminum wire is the innermost part of the groove at the end farthest from the cutting place among the grooves of the semicircular cross section of the upper wire gripping body ( Since it is strongly pressed (forced) at one point in the deep) part, there is a possibility that the upper part of the aluminum wire may damage the covering member of the aluminum wire.

So, in order to distribute the stress applied to the aluminum wire, the groove of the upper wire gripping body is V-shaped, and the stress applied to the upper part of the aluminum wire when pulled to the cutting place is distributed. I think. However, even in that case, it was not possible to prevent damage to the coating member of the aluminum wire at the end of the V-shaped groove of the upper wire gripping body far from the cutting place.

Japanese Unexamined Patent Publication No. 2014-12818

The present invention, in order to solve the problems of the prior art as described above, provides a wire gripper capable of preventing damage to a covering member of an aluminum wire when pulling an aluminum wire to a cutting place and a live wire distribution tool using the same aims to do

The wire gripper of the present invention is a wire gripper for an aluminum wire that holds an aluminum wire in the vicinity of a cutting place in order to cut an aluminum wire coated with an aluminum wire rod by a covering member in a state where it is suspended in the air. A receiver formed on the lower surface with a fitting groove fitted thereto from above, a cam member disposed on the lower side of the receiver and provided with a support groove formed on the upper surface for supporting an aluminum wire from below, and the cam member and the receiver It is provided with a gap adjustment unit for adjusting the gap, and a connection part that can be connected freely swinging in the vertical direction with respect to the tensioning tool that pulls the wire gripper in a direction approaching (approaching) the cutting place of the aluminum wire, The fitting groove has a V-shaped cross section at a first end closer to the cutting place and a semicircular cross section at a second end farther from the cutting place, and the fitting groove In at least a part of the fitting groove including the second end on the far side from the cutting place, as it approaches the second end on the far side along the fitting groove, from the V-shaped cross section It is characterized in that it has a cross-section changing portion that gradually changes to a semicircular cross-section.

In the wire gripper of the present invention, when holding an aluminum wire in the vicinity of the cutting place to cut the aluminum wire in a state where it is suspended in the air, the fitting groove of the receiver is fitted to the upper part of the aluminum wire, and in that state , By adjusting the gap between the cam member and the receiver in a narrowing direction by the gap adjustment unit, the lower part of the aluminum wire is fitted into the support groove of the cam member. As a result, the aluminum electric wire is held between the cam member and the receiving, and is in a wire gripping state.

When the wire gripper is pulled in a direction closer to the cutting point by the pulling tool, the aluminum wire bends upward near the cutting point. At this time, corresponding to the bending, the wire gripper swings in the vertical direction at the connection portion with the tensioning tool, and the end portion of the cam member and the receiving end on the side far from the cutting place is lowered. With that, the upper part of the aluminum wire is pressed (forced) hard against the inner surface of the fitting groove of the receiver.

The fitting groove has a V-shaped cross section at the first end closer to the cutting place and a semicircular cross section at the second end farther from the cutting place, and the second end of the fitting groove has a far side. At least a portion including the end portion has a cross-section change portion that gradually changes from a V-shaped cross section to a semicircular cross section along the fitting groove as it approaches the far-side second end portion.

Therefore, at the part close to the cut place in the fitting groove, the two surfaces constituting the V-shaped cross section are pressed separately and firmly against the upper part of the aluminum wire, thereby separating the aluminum wire from both sides in the width direction. After being inserted, it is possible to stably support the aluminum electric wire so as not to shift in either the axial direction or the width direction.

Further, in the cross section changing portion including the second end on the far side of the fitting groove, the cross section of the fitting groove gradually changes from a V-shaped cross section to a semicircular cross section as the second end on the far side of the fitting groove approaches. has a shape that Therefore, the supported state of the upper part of the aluminum wire is from the state supported at two points from both sides in the width direction by the two faces of the V-shaped cross section as it moves away from the cut place to the curved face of the semicircular cross section. It smoothly changes to a supported state on a wide contact surface in the width direction. Therefore, even in a portion close to the second end on the far side of the fitting groove, it is possible to stably support the aluminum wire while suppressing its displacement in the axial and width directions.

Further, in a state where the aluminum wire is bent upward at the cutting place, since the second end on the far side of the fitting groove is located lower than the first end, the upper end of the aluminum wire is pressed most strongly. However, since the second end on the far side has a semicircular cross section, even if the upper end of the aluminum wire is pressed hard into the fitting groove, the semicircular cross section at the second end on the far side of the fitting groove is curved It is possible to support while distributing the force on a wide contact surface in the width direction by the surface.

As a result, the aluminum wire is stably supported over the entire length of the fitting groove of the receiver so as not to be displaced in the axial and width directions, and the aluminum wire is pressed against the second end of the far side of the fitting groove. It is possible to prevent breakage or damage to the coating member of the aluminum wire.

It is preferable that the edge of the 2nd end part of the side far from the cutting place in the said fitting groove|channel is chamfered in the said receiving part.

With this configuration, when the aluminum wire is gripped by the wire gripper and pulled to the cutting place, even if the upper part of the aluminum wire is pressed against the edge of the second end of the fitting groove far from the cutting place (even if it is forced) , the forces are dissipated by the wide contact surface formed by the edges being chamfered. Therefore, it is possible to reliably prevent or suppress damage or damage to the coating member of the aluminum wire due to contact of the aluminum wire with the edge of the fitting groove.

The semicircular cross section of the second end portion of the fitting groove is formed to be deeper than the depth of the V-shaped cross section of the first end portion, and the bottom of the V-shaped cross section of the cross section changing portion. The angle of the line extending from the bottom of the portion gradually changing from the V-shaped cross section to the semicircular cross section with respect to the line extending the portion is based on the magnitude of the bending of the aluminum wire in the state where the aluminum wire is pulled to the cutting place. It is preferable to set

Depending on conditions such as the thickness of the aluminum wire, the amount of bending when the aluminum wire is pulled to the cutting place is different. Therefore, in the configuration described above, the semicircular cross section of the second end of the fitting groove is deeper than the depth of the V-shaped cross section of the first end so as to correspond to the magnitude of the bending of the aluminum wire. In the structure formed, the angle of the line extending from the bottom of the portion gradually changing from the V-shaped cross section to the semicircular cross section with respect to the line extending from the bottom of the V-shaped cross section in the cross-sectional change portion is It is set based on the size of the bending of the aluminum wire in a state where the aluminum wire is pulled to the cutting place. As a result, when the aluminum wire is pulled to the cutting place, in the state where the aluminum wire is bent upward, the aluminum wire is pressed against the support, but the force of the aluminum wire being pressed against the support is distributed over the entire cross-section change portion, and the support it becomes possible As a result, it becomes possible to reliably prevent the concentration of force on the second end on the far side of the fitting groove, and breakage or damage to the covering member of the aluminum wire at the second end on the far side of the fitting groove. can be suppressed more reliably.

It is preferable that the receiver is freely detachably attached to the space adjusting unit. With this configuration, it is possible to replace with the receiver having a fitting groove corresponding to the thickness of the aluminum wire.

It is preferable that the said cam member and the said receiver are attached to the said space|regulation part freely detachably. With this configuration, it is not only possible to replace with the receiver having a fitting groove corresponding to the thickness of the aluminum wire, but also a wire made of a material other than aluminum wire, for example, a spike suitable for holding a wire having a copper wire It is possible to replace with a cam member having (protrusion) and a receiver. As a result, the versatility of the wire gripper is expanded.

In the live wire distribution tool of the present invention, in order to cut an aluminum wire coated with an aluminum wire rod by a covering member in a state where it is suspended in the air, hold the aluminum wire at both sides near the cutting place and move the aluminum wire to the cutting place on both sides. As a live wire distributing tool pulling from, the wire gripper described above, a pair of wire grippers for holding the aluminum wire at both sides of the cutting place, and each of the pair of wire grippers in a direction approaching the cutting place of the aluminum wire. A tool for tensioning is provided, wherein the tool for tensioning is provided with an extension rod that freely expands and contracts, and each of the connection parts of the pair of wire grippers is connected to both ends of the extension rod, thereby extending the pair of The wire gripper is characterized in that it is freely oscillatingly connected in the vertical direction with respect to the telescopic rod.

With this configuration, the pair of wire grippers configured as described above hold both sides of the aluminum wire cutting location, and the extension bar of the tensioning tool moves each of the pair of wire grippers in a direction approaching the aluminum wire cutting location. pull As a result, it is possible to easily pull the aluminum wire from both sides to the cutting place, and furthermore, damage to the covering member of the aluminum wire in the portion held by the wire gripper on both sides of the cutting place in the aluminum wire. or damage can be prevented.

According to the wire gripper of the present invention and the live wire distributing tool using the same, it is possible to prevent damage to the coating member of the aluminum wire when the aluminum wire is pulled to the cutting place.

1 is a front view of a live wire distributing tool in which wire grippers are connected to both left and right sides of a telescoping bar according to an embodiment of the present invention.
Figure 2 is a view showing the right wire gripper of Figure 1, Figure 2 (a) is a front view, Figure 2 (b) is a view of the wire gripper of Figure 2 (a) viewed from the direction of arrow A.
Figure 3 is a view showing the left wire gripper of Figure 1, Figure 3 (a) is a front view, Figure 3 (b) is a view of the wire gripper of Figure 3 (a) viewed from the arrow B direction.
Fig. 4 is a view showing a receiving for a 32 sq aluminum wire in the right wire gripper of Fig. 1, Fig. 4 (a) is a front view, Fig. 4 (b) is a bottom view, Fig. 4 (c) is a view of the wire gripper of FIG. 4 (a) viewed from the direction of arrow C, FIG. 4 (d) is a view schematically showing a V-shaped cross section of the first end of the fitting groove, FIG. 4 ( e) is a diagram schematically showing a cross section of the cross-sectional change portion of the fitting groove in the cross section taken along the line E-E of Fig. 4 (a), and Fig. 4 (f) is a semicircular shape of the second end of the fitting groove It is a drawing schematically showing a cross section of
Figure 5 is a view showing a cam member in the right wire gripper of Figure 1, Figure 5 (a) is a front view, Figure 5 (b) is a plan view, Figure 5 (c) is a view of Figure 5 ( It is the left side view of a).
Figure 6 is a view showing a receiving for 120sq aluminum wire attachable to the right wire gripper of Figure 1, Figure 6 (a) is a front view, Figure 6 (b) is a bottom view, Figure 6 (c) is a view of the wire gripper of FIG. 6 (a) viewed from the direction of the arrow D.

Next, with reference to the drawings, an embodiment of the wire gripper of the present invention and a live wire dispensing tool using the same will be described in more detail.

Fig. 1 shows a live distribution tool 1 equipped with a wire gripper 2 for an aluminum wire W according to an embodiment of the present invention.

The live wire distributing tool 1 shown in FIG. 1 cuts the aluminum wire W covered with an aluminum wire rod in the air in a state where it is suspended in the air. It is a tool (1) for holding the electric wire (W) and pulling the corresponding aluminum electric wire (W) from both sides to the corresponding cutting place (CT).

Specifically, the live wire distributing tool 1 includes a pair of wire grippers 2 that hold the aluminum wire W at both sides of the cutting location CT, and each of the pair of wire grippers 2, the aluminum wire W ) is provided with a tool 3 for tension that pulls in a direction P approaching (approaching) the cutting place CT. In the case of a pair of wire grippers 2, when one of the left and right wire grippers is specifically called, the right wire gripper in FIG. 1 is called a wire gripper 2R, and the left wire gripper is called a wire gripper 2L.

The tool 3 for tensioning is equipped with an expansion bar 3a that expands and contracts freely, and support portions 3b provided at both ends of the expansion bar 3a.

The support portion 3b freely swings and supports the wire gripper 2 in the vertical direction with the horizontal axis as the center of rotation. Each of the pair of wire grippers 2 is provided with a connection portion 7 connectable to the support portion 3b.

The wire gripper 2 shown in FIGS. 2 and 3 has a configuration capable of grasping the aluminum wire W in the vicinity of the cutting place CT in order to cut the aluminum wire W in a state suspended in the air. . 2 shows a wire gripper 2R on the right side of the cutting site CT, and FIG. 3 shows a wire gripper 2L on the left side of the cutting site CT. The right wire gripper 2R and the left wire gripper 2L have the same basic structure, but are symmetrical with respect to the cutting site CT.

Each of the wire grippers 2 shown in FIGS. 2 and 3 includes (all) a receiver 4, a cam member 5 disposed below the receiver 4, and the receiver 4 and the cam member. It is equipped with the space|interval adjustment part 6 which adjusts the space|interval of (5), and the connection part 7 connected to the support part 3b (refer FIG. 1) of the said tensioning tool 3. By sandwiching the aluminum wires (W) between the brackets (4) and the cam member (5) disposed above and below, the wire gripper (2) can grip the aluminum wires (W).

Hereinafter, the specific configuration of the wire gripper 2 will be described taking the receiver 4 of the right wire gripper 2R, the cam member 5, the gap adjustment unit 6, and the connection unit 7 as an example.

The receiving 4 is a metal block-shaped member for supporting the aluminum wire from above. On the lower surface of the receiver 4, a fitting groove 4a is formed to fit the aluminum electric wire W from above.

Fig. 4 is a view showing a receiving for a 32 sq aluminum wire in the right wire gripper of Fig. 1, Fig. 4(a) is a front view, Fig. 4(b) is a bottom view, Fig. 4(c) ) is a view viewed from the arrow C in FIG. 4 (a), FIG. 4 (d) is a view schematically showing a V-shaped cross section of the first end of the fitting groove, and FIG. 4 (e) is Fig. 4(a) is a diagram schematically showing a cross section of the cross-sectional change portion of the fitting groove along the line E-E, and Fig. 4(f) shows a semicircular cross section of the second end of the fitting groove. It is a schematic drawing.

As shown in (a)-(f) of FIG. 4, the fitting groove|channel 4a of the receiver 4 has a V-shape in the 1st end part 4a1 of the side close to cutting place CT. It has a cross section (see Fig. 4(d)). Moreover, it has a semicircular cross section (refer to FIG. 4(f)) in the 2nd end part 4a2 of the side far from the cutting|disconnection CT of the fitting groove|channel 4a.

Moreover, the fitting groove 4a is far along the fitting groove 4a in at least a part including the second end part 4a2 on the side far from the cutting place CT among the fitting grooves 4a. It has a cross-sectional change portion 4c that gradually changes from a V-shaped cross section to a semicircular cross section as it approaches the second end 4a2 of the side. Specifically, in the cross-sectional change portion 4c of the fitting groove 4a, as shown in Fig. 4(e), the fitting groove 4a gradually changes from a V-shaped cross section to a semicircular cross section. change from below

The range of the cross-sectional change portion 4c may be at least a part of the entire length of the fitting groove 4a including the second end portion 4a2, and is not particularly limited in the present invention. For example, although it is set in the range of about 1/2 - 1/4 of the full length of the fitting groove 4a, the cross-sectional change part 4c may be formed over the full length of the fitting groove 4a.

As shown in Fig. 4(a), the semicircular cross section of the second end portion 4a2 in the fitting groove 4a is deeper than the depth of the V-shaped cross section of the first end portion 4a1. is formed In this configuration, the line along which the bottom of the portion gradually changing from the V-shaped cross section to the semicircular cross section extends with respect to the line 4e along which the bottom of the V-shaped cross section in the cross-section changing portion 4c extends. The angle θ1 of (4f) is set based on the size of the bending of the aluminum wire W in a state where the aluminum wire W is pulled to the cutting place CT.

In the case of a thin aluminum wire W (for example, 32 sq (ie, an aluminum wire having a nominal cross-sectional area of 32 mm 2 ), the aluminum wire W is greatly bent, so considering the amount of bending, the above angle θ1 is On the other hand, in the case of a thick aluminum wire (W) (for example, 120 sq (ie, an aluminum wire having a nominal cross-sectional area of 120 mm)), the amount of bending of the aluminum wire (W) is 32 sq of aluminum as described above. Therefore, taking this into consideration, in the receiver 4 corresponding to the 120 sq aluminum wire as shown in Figs. is set

In addition, in the receiver 4 shown in (a) and (f) of FIG. 4, the edge of the 2nd end part 4a2 on the far side from the cutting place CT in the fitting groove 4a is chamfered, there is. Specifically, in the edge of the second end portion 4a2 on the far side from the cutting place CT in the fitting groove 4a, a chamfer with roundness (so-called R) added so as to eliminate the corner of the edge Part 4d is formed. In addition, the chamfer part 4d should just be able to remove the edge of the fitting groove|channel 4a, and may be a part (so-called C-surface) removed by diagonally cutting the edge edge.

As shown in FIGS. 1-3, the cam member 5 is arrange|positioned on the lower side of the receiver 4, and has the structure which can support the aluminum electric wire W from below.

Specifically, as shown in Figs. 5(a) to (c), a support groove 5a for supporting the aluminum wire W from below is formed on the upper surface of the cam member 5.

The support groove 5a has a V-shaped cross section along its entire length. Therefore, regardless of the thickness of the aluminum wire W, it is possible for the two surfaces constituting the support groove 5a to support the wire from both sides in the width direction.

In addition, the inner surface of the support groove 5a of the cam member 5 is subjected to processing such as thermal spraying of a metal substance or the like, so that the aluminum wire W is cut using the distributing tool 1 for live wires. It is possible to prevent the aluminum wire W from slipping inside the support groove 5a when pulled to the cutting site CT.

Further, on the lower surface of the cam member 5, an insertion groove 5b into which an arrow portion 6d1 of the spacing adjusting portion 6 described later is inserted is formed.

The space adjusting part 6 should just have a structure which adjusts the space|interval of the cam member 5 and the receiving 4, and, in this invention, about the specific structure of the space|interval adjusting part, it is not specifically limited.

For example, the gap adjusting part 6 shown in FIG. 2 includes a base part 6a, a fixing part 6b for attaching and detachably fixing the base part 4 to the base part 6a, and a cam member 5 ) is attached so as to be movable in the vertical direction with respect to the base portion 6a, and a pressing portion 6d for pressing the cam member 5 upward.

A fixing part 6b is attached to the upper part of the base part 6a. The fixing part 6b has a mechanism for clamping (clamping) the protrusion provided on the upper part of the receiving part 4. This makes it possible to freely attach or detach the receiver 4 to the base portion 6a with the fitting groove 4a facing downward.

The attaching portion 6c has a shape that surrounds (surrounds) the outer periphery of the vertical portion 6a1 extending in the vertical direction of the base portion 6a, and moves freely in the vertical direction along the vertical portion 6a1. . The cam member 5 is attached to the attaching portion 6c in a freely detachable manner by means of bolts or the like. Thereby, it is possible to dispose the cam member 5 to move freely in the vertical direction in the lower side of the receiver 4.

The pressing portion 6d includes an arrow portion 6d1 that is movable in the horizontal direction, a wedge portion 6d2 that moves freely in the vertical direction, and a screw portion 6d3 that presses the wedge portion 6d2 upward. have The lower slope S1 of the arrow portion 6d1 abuts against the upper slope S2 of the wedge portion 6d2. The upper part of the arrow portion 6d1 is fitted into the insertion groove 5b of the cam member 5 with a slight margin. Therefore, inside the insertion groove 5b, horizontal movement of the arrow 6d1 is permitted.

The threaded portion 6d3 is a rod-shaped member having a thread formed on the outer peripheral surface, and a screw hole formed in the horizontal portion 6a2 extending in the horizontal direction from the lower end of the vertical portion 6a1 of the base portion 6a ( (not shown) is screwed. Therefore, by rotating the threaded portion 6d3, the upper end of the threaded portion 6d3 lifts the wedge portion 6d2 and the arrow portion 6d1. Together with that, the upper part of the arrow portion 6d1 lifts the cam member 5 in the state of being inserted into the insertion groove 5b of the cam member 5. This makes it possible to bring the cam member 5 closer to the base 4 and narrow the distance between the base 4 and the cam member 5, and by these base 4 and cam member 5, It is possible to pinch the aluminum wire W from the top and bottom.

As shown in FIGS. 1 and 2, the connecting portion 7 is a tensioning tool 3 that pulls the wire gripper 2 in a direction P closer to the cutting place CT of the aluminum wire W. It is a part that can be connected freely swinging in the vertical direction with respect to the support portion (3b) disposed at both ends of the telescopic rod (3a) of the.

The connecting portion 7 shown in FIG. 2 is provided at the end of the arrow portion 6d1 of the pressing portion 6d of the spacing adjusting portion 6. For this reason, the arrow part 6d1 is connected to the extension bar 3a of the tool 3 for tension via the connecting part 7 and the said support part 3b. Therefore, when the telescoping rod 3a is shortened, the arrow 6d1 is pulled together with the connecting portion 7 in the direction P closer to the cutting place CT. At this time, the arrow portion 6d1 is pushed upward along the upper inclined surface S2 of the wedge portion 6d2. As a result, the cam member 5 located above the arrow portion 6d1 is also pushed upward, thereby increasing the force for clamping the aluminum wire W by the receiver 4 and the cam member 5. It is possible to reliably suppress the slipping of the aluminum wire W in the axial direction by tightening it (so-called tighter tightening).

In addition, although the coupling part 7 of this embodiment is provided in the edge part of the place close to the cutting place CT of the arrow part 6d1 of the pressing part 6d of the space|interval adjustment part 6, this invention is limited to this it is not going to be For example, in the case of the wire gripper 2 not having the arrow portion 6d1, the connecting portion 7 may be disposed on the base portion 6a or the like.

In addition, although the said space|interval adjustment part 6 adjusts the space|interval of the base 4 and the cam member 5 by fixing the base 4 and moving the cam member 5 up and down, this invention It is not limited to this. As another gap adjusting part 6, a structure in which the receiving member 4 is moved up and down while fixing the cam member 5 may be used, or a configuration in which both the receiving member 4 and the cam member 5 (both sides) are moved up and down. even good

When holding the aluminum wire W in the vicinity of the cutting place CT in order to cut the aluminum wire W in a state suspended in the air using the wire gripper 2 configured as described above, FIG. 1 to FIG. As shown in 2, the fitting groove 4a of the receiver 4 is fitted to the upper part of the aluminum wire W, and in that state, the cam member 5 and the gap adjusting part 6 Adjust in the direction of narrowing the space|interval of the receiving part 4, and make the lower part of the aluminum electric wire W fit into the support groove 5a of the cam member 5. As a result, the aluminum wire W is held between the cam member 5 and the receiving 4, and is in a wire gripping state.

And, when the wire gripper 2 is pulled in the direction P approaching the cutting place CT by shortening the extension bar 3a in the tool 3 for tension, the aluminum wire W It curves upward in the vicinity of this cutting site CT. At this time, in response to the bending, the wire gripper 2 swings in the vertical direction at the connection portion 7 with the pulling tool 3, and the cam member 5 and the receiver 4 move to the cutting position CT. The end of the side farthest from is lowered. With that, the upper part of the aluminum wire W is strongly pressed (forced) against the inner surface of the fitting groove 4a of the receiving 4.

As shown in FIG. 4(d), the fitting groove 4a has a V-shaped cross section at the first end 4a1 on the side close to the cutting site CT, and FIG. 4(f) As shown in , the second end portion 4a2 on the far side from the cutting site CT has a semicircular cross section deeper than the depth of the V-shaped cross section of the first end portion 4a1. In addition, the fitting groove 4a is at least part of the fitting groove 4a including the second end portion 4a2 on the far side, as shown in (a) and (e) of FIG. 4 . , and a cross-section changing portion 4c that gradually changes from a V-shaped cross section to a semicircular cross section as it approaches the second end portion 4a2 on the far side along the fitting groove 4a. Therefore, in the part close to the cutting place CT in the fitting groove 4a, the two surfaces constituting the V-shaped cross section are separately pressed against the upper part of the aluminum wire W, and , It is possible to pinch the aluminum wire W from both sides in the width direction and stably support the aluminum wire W so as not to shift in either the axial direction or the width direction.

The cross-sectional change portion 4c including the second end portion 4a2 on the far side of the fitting groove 4a approaches the second end portion 4a2 on the far side of the fitting groove 4a. The cross section of (4a) has a shape gradually changing from a V-shaped cross section to a semicircular cross section. Therefore, the supported state of the upper part of the aluminum wire W is from the state supported at two points from both sides in the width direction by the two faces of the V-shaped cross section along the distance (away) from the cutting place CT. It smoothly changes to a state supported by a wide contact surface in the width direction by a curved surface of a semicircular cross section. Therefore, even in a portion close to the second end portion 4a2 on the far side of the fitting groove 4a, it is possible to stably support the aluminum wire W while suppressing its displacement in the axial and width directions. .

In addition, when the aluminum wire W is bent upward at the cutting point CT, the second end 4a2 on the far side of the fitting groove 4a is located lower than the first end 4a1, so The upper end of the aluminum wire (W) is pressed most strongly. However, since the second end 4a2 on the far side has a semicircular cross section, even if the upper end of the aluminum wire W is pressed into the fitting groove 4a, the far side of the fitting groove 4a It is possible to support while distributing the force on a wide contact surface in the width direction by the curved surface of the semicircular cross section in the second end portion 4a2 of the .

As a result, the aluminum wire W is stably supported over the entire length of the fitting groove 4a of the receiver 4 so as not to shift in the axial direction and the width direction, and the aluminum wire W is fitted into the fitting groove ( It is possible to prevent breakage or damage to the covering member of the aluminum wire W due to being pressed against the second end 4a2 on the far side of 4a).

Moreover, in the receiver 4 of this embodiment, as shown in FIG. 4 (a), (f), the 2nd end part of the side far from the cutting place CT in the fitting groove 4a ( The edge of 4a2) is chamfered to form a chamfered portion 4d. Therefore, when the aluminum wire W is caught by the wire gripper 2 and pulled to the cutting place CT, the upper part of the aluminum wire W is far from the cutting place CT of the fitting groove 4a. Even when pressed against the edge of the second end 4a2 of the side, the force is dispersed by the wide contact surface formed by the chamfered portion 4d of the edge. Therefore, it is possible to reliably prevent or suppress damage or damage to the coating member of the aluminum wire W due to contact of the aluminum wire W with the edge of the fitting groove 4a.

In addition, in this embodiment, the aluminum wire W is a fitting groove of a shape corresponding to the difference in the size of the bending when the aluminum wire W is pulled to the cutting place CT depending on conditions such as thickness. It has the cross-sectional change part 4c of (4a). Specifically, in the structure of the above embodiment, so as to correspond to the size of the bending of the aluminum wire W, as shown in Fig. 4 (a), the second end portion 4a2 in the fitting groove 4a. The semicircular cross section of ) is formed to be deeper than the depth of the V-shaped cross section of the first end portion 4a1, and the line ( The angle θ1 of the line 4f extending from the bottom of the portion gradually changing from the V-shaped cross section to the semicircular cross section with respect to 4e) is in the state where the aluminum wire W is pulled to the cutting place CT It is set based on the size of the bending of the aluminum wire W. Thereby, when the aluminum wire W is pulled to the cutting place CT, in the state where the aluminum wire W is bent upward, the aluminum wire W is pressed against the receiver 4, but the aluminum wire W It becomes possible to distribute and support the force pressed against the base 4 over the entire cross-section change portion 4c. As a result, it becomes possible to reliably prevent the concentration of force on the second end 4a2 on the far side of the fitting groove 4a, and the second end 4a2 on the far side of the fitting groove 4a. ), it is possible to more reliably suppress breakage or damage to the coating member of the aluminum wire W.

Moreover, in the wire gripper 2 of this embodiment, the receiver 4 is attached to the fixing part 6b of the space|interval adjusting part 6 freely detachably. Therefore, it is possible to replace with the receiving 4 which has the fitting groove|channel 4a corresponding to the thickness of the aluminum electric wire W. For example, in the wire gripper 2 shown in FIGS. 2 and 3, a 32 sq aluminum cable bracket 4 is attached to the fixing portion 6b of the space adjustment unit 6, but this bracket ( 4) Instead, as a receiving portion corresponding to the thick aluminum wire, it is possible to detachably attach the receiving portion 4 for the 120 sq aluminum wire shown in FIG. 6 to the fixing portion 6b.

In addition, the receiving 4 for an aluminum electric wire of 120 sq shown in FIG. 6, compared with the receiving 4 for an aluminum electric wire of 32 sq shown in FIG. ) is slightly different in shape, but it can be exchanged with the receiver 4 for 32sq above if it has a common structure for other parts.

Moreover, in the wire gripper 2 of this embodiment, the cam member 5 and the receiving 4 are attached to the space|interval adjusting part 6 freely detachably. Therefore, it is not only possible to replace it with the receiving 4 having a fitting groove 4a corresponding to the thickness of the aluminum wire W, but also an wire made of a material other than the aluminum wire W, for example, a copper wire. It is possible to replace the cam member 5 and the receiving 4 with spikes (protrusions) suitable for holding one electric wire. As a result, the versatility of the wire gripper 2 is expanded.

In the live wire distributing tool 1 equipped with the wire gripper 2 of this embodiment, both sides of the cutting place CT of the aluminum wire W are held by the pair of wire grippers 2 configured as described above, and tension is applied. An aluminum wire ( It is possible to easily pull W) to the cutting site CT from both sides. In addition, it is possible to prevent breakage or damage to the coating member of the aluminum wire W in the portion held by the wire gripper 2 at both sides of the cutting place CT in the aluminum wire W. .

The present invention can be widely used for a wire gripper for aluminum wires and a live wire distribution tool using the same, and it is possible to prevent damage to the coating member of the aluminum wire when pulling the aluminum wire to the cutting place.

1: Live distribution tool
2, 2R, 2L: wire gripper
3: Tensioning tool
3a: telescopic bar
3b: support
4: receiver
4a: fitting groove
4a1: first end
4a2: second end
4c: section change part
4d: chamfer part
4e, 4f: line
5: cam member
5a: support groove
6: spacing adjustment unit
6a: base part
6b: fixing part
6c: attachment part
6d: pusher
6d1: arrow part
6d2: wedge
6d3: screw part
7: connection part
CT: cutting place
W: aluminum wire

Claims (6)

A wire gripper for aluminum wires to hold aluminum wires in the vicinity of the cutting place in order to cut aluminum wires covered with aluminum wires by the covering member in a state where they are suspended in the air (

)as,
A receiver formed on the lower surface with a fitting groove fitted to the aluminum wire from above;
A cam member disposed on the lower side of the receiver and having a support groove formed on the upper surface for supporting the aluminum wire from the lower side;
A gap adjustment unit for adjusting the gap between the cam member and the receiver;
It has a connecting part that can be connected freely swinging in the vertical direction with respect to a tool for tension that pulls the wire gripper in a direction closer to the cutting place of the aluminum wire,
The fitting groove of the receiver has a V-shaped cross section at a first end closer to the cutting place and a semicircular shape at a second end farther from the cutting place. with a cross section of
Further, the fitting groove forms a V-shape as it approaches the far side second end along the fitting groove in at least a part including the second end of the fitting groove on the far side from the cutting place. Having a cross-sectional change portion that gradually changes from a cross section to a semicircular cross section,
A wire gripper, characterized in that. According to claim 1,
In the receiver, an edge of a second end on a side far from the cutting position in the fitting groove is chamfered. According to claim 2,
The semicircular cross section of the second end portion of the fitting groove is formed to be deeper than the depth of the V-shaped cross section of the first end portion;
The angle of the line extending from the bottom of the portion gradually changing from the V-shaped cross section to the semicircular cross section with respect to the line extending from the bottom of the V-shaped cross section in the cross-section changing portion is the location where the aluminum wire is cut. A wire gripper that is set based on the size of the bending of the aluminum wire in a pulled state. According to any one of claims 1 to 3,
The wire gripper, wherein the receiver is freely detachably attached to the gap adjusting unit. According to any one of claims 1 to 3,
The wire gripper, wherein the cam member and the receiver are freely detachably attached to the gap adjustment unit. In order to cut an aluminum wire covered by an aluminum wire rod in the air in a state where it is suspended in the air, holding the aluminum wire at both sides near the cutting place and pulling the aluminum wire to the cutting place from both sides As a distribution tool,
The wire gripper according to any one of claims 1 to 3, comprising: a pair of wire grippers for gripping the aluminum wire at both sides of the cutting place;
A tensioning tool for pulling each of the pair of wire grippers in a direction closer to the cutting place of the aluminum wire,
The tool for tensioning is provided with a telescoping rod that freely expands and contracts,
By connecting each of the connection parts of the pair of wire grippers to both ends of the telescopic rod, the pair of wire grippers are freely connected to the telescopic rod in the vertical direction,
Live distribution tool.

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