Coating removal equipment and coating removal methods using the same materials.

Abstract

DEPCT64 The coating removal device of this invention incorporates a rotary drive mechanism. And the rotary coating stripping tool of the rotary drive system is integrated with the rotary plate. The first part, which has a protruding section and a second fastening assembly of the coating stripping tool, has a section with a similar shape. The feathers of the coating stripping tool, in the detached state, are attached to the second turntable and the rotating plate. The first part will rotate in a predetermined direction to bring the feather-shaped section into contact. This method involves switching the coating stripper to the clamped state, and when the tool... The coating remover is in a clamped position, and the first turntable rotates in the opposite direction to the previous direction. The predetermined design allows the feather-shaped section to come into contact with the protrusion in this way. Switch the coating stripper to the released state. -----------------------------------------------------------

Description

Coating stripping device and coating stripping method using the same

[0001] The present invention relates to a stripping device for stripping insulating coatings from electric wires used in high-voltage overhead lines and the like, and a stripping method using the same.

[0002] In overhead line construction, for example, in the construction of connecting the end or middle of an insulatingly coated electric wire to another electric wire, it is necessary to strip the insulating coating from the electric wire to be connected to expose the underlying core wire. Stripping the insulating coating of such electric wires is necessary in construction aimed at connecting electric wires, separating electric circuits, connecting equipment to electric wires, etc., and is generally performed while the wire is live to avoid power outages. Therefore, a coating stripping device is attached to an insulating operating rod and remotely operated from the ground to perform the work. Conventionally, a coating stripping device such as that shown in FIG. 8 has been used for such work (see, for example, Patent Document 1).

[0003] In the sheath stripping device (100), the sheath stripping tool (110) has a pair of holding members (111) and (112) that form an electric wire holding portion (113) by mutually opposing inner surfaces, and that accommodates the electric wire A in the electric wire holding portion (113) from two directions perpendicular to the central axis of the electric wire A, and a stripping blade (118) that protrudes into the electric wire holding portion (113) at a predetermined forward angle relative to the electric wire A accommodated in the electric wire holding portion (113), and a rotary drive tool (120) cuts out a part of the outer periphery to accommodate the electric wire A in a detachable manner in the center. The device is configured to include a turntable (121) having a wire accommodating space (121a) and a wire insertion / removal opening (121b) formed in a cutout portion, a case (127) for rotatably holding the turntable (121), a rotation transmission means (130) for supporting the case (127) and attached to the tip of the remote control rod (2) for transmitting the rotation of the rotation shaft of the remote control rod (2) to the rotation of the turntable (121), and a sheath stripping tool holder (140) for attaching the sheath stripping tool (110) to the turntable (121). The rotational force generated by the rotation of the remote control rod (2) is transmitted to the sheath stripping tool (110) via the rotation drive tool (120), and by rotating the sheath stripping tool (110) around the central axis of the electric wire A, the insulation sheath (not shown) of the electric wire A can be stripped with the blade width of the stripping blade (118).

[0004] In the coating stripping tool (110) of such a coating stripping device (100), when the operating ring (115) is rotated in one direction, the holding members (111) and (112) are moved toward each other, thereby narrowing the opposing gap between the two holding members (111) and (112), and conversely, when it is rotated in the other direction, the holding members (111) and (112) are moved away from each other, thereby widening the opposing gap between the two holding members (111) and (112).

[0005] JP 2008-136299 A

[0006] The work of stripping the insulation from the middle of an overhead electric wire is necessary during construction work aimed at connecting electric wires, separating electric circuits, connecting equipment to electric wires, etc., and is generally carried out with the wire live to avoid power outages.

[0007] In order to strip the insulation from a live electric wire, it is necessary to approach the wire suspended in the air, but when a worker approaches the wire in the air to work, it is dangerous to work at a high altitude and the work efficiency is poor. On the other hand, when the insulation stripping device (100) is remotely operated from the ground or a work vehicle, it is particularly necessary to prepare a separate opening and closing operation rod, hang the tip hook of the opening and closing operation rod on the operation ring (115), and rotate this to rotate the advance / retract shaft and advance the holding members (111), (112) toward the electric wire holding part, but this operation is complicated and difficult because it requires operating two rods, and therefore the work efficiency is poor.

[0008] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a coating stripping device and a coating stripping method using the same that can be remotely operated from the ground or a work vehicle, and can safely and efficiently strip the insulating coating of electric wires and the like that are suspended in the air.

[0009] In order to achieve the above object, the present invention provides a sheath stripping device comprising a rotary drive tool attached to the tip of a remote control rod held by an operator, and a sheath stripping tool attached to the rotary drive tool, wherein a rotational force generated by rotating the remote control rod is transmitted to the sheath stripping tool via the rotary drive tool, and the sheath stripping tool is rotated around the central axis of an electric wire to strip the insulation coating of the electric wire, and the sheath stripping tool comprises a holding member for holding the electric wire, and a sheath stripping tool for stripping the insulation coating of the electric wire held by the holding member. The rotary drive tool comprises a case in which a part of the outer periphery is cut out to form an electric wire insertion / removal opening and an electric wire accommodating space in which the electric wire is inserted / detached from the electric wire insertion / removal opening, a turntable in which a part of the outer periphery is cut out to form the electric wire insertion / removal opening and the electric wire accommodating space in which the electric wire is inserted / detached from the electric wire insertion / removal opening and is rotatably held by the case, and rotation transmission means held by the case and transmitting rotation of the rotary shaft of the remote control rod to rotation of the turntable, and the holding member is a first holding member. and a second holding member rotatable relative to the first holding member, and is configured to be switchable between a holding state in which the electric wire is clamped between the first holding member and the second holding member and a release state in which an electric wire insertion / removal opening is formed and the electric wire can be inserted / removed through the electric wire insertion / removal opening, the turntable of the rotation drive tool includes a second turntable having a first rod body and a second rod body parallel to the first rod body, and the first holding member of the insulation stripping tool has a first hole into which the first rod body is inserted and a second hole into which the second rod body is inserted, The turntable of the rotary drive tool includes a first turntable having a protrusion, and the second holding member of the coating stripper has a spring portion, the coating stripper in the released state is attached to the second turntable, and when the first turntable rotates in a predetermined direction, the spring portion comes into contact with the protrusion, thereby entering the held state, and when the coating stripper is in the held state, the first turntable rotates in a direction opposite to the predetermined direction, thereby causing the spring portion to come into contact with the protrusion, thereby entering the released state.

[0010] According to this configuration, the first holding member of the released sheath stripping tool is attached to the second turntable, and the first turntable is rotated in a predetermined direction by rotating the remote control wand. Then, the protruding portion of the first turntable comes into contact with the spring portion of the second holding member, causing the second holding member to also rotate in the predetermined direction, thereby placing the sheath stripping tool in a held state. As a result, the electric wire is held by the holding member and accommodated in the electric wire accommodating space of the turntable along its rotation axis. When the first turntable is rotated in the predetermined direction with the electric wire accommodated and held in the electric wire accommodating space, the sheath stripping tool in the held state rotates around the central axis of the electric wire, and the insulating sheath of the electric wire is stripped with the stripping blade. Then, while the sheath stripping tool is in the held state, the first turntable is rotated in a direction opposite to the predetermined direction by rotating the remote control wand. Then, the protruding portion of the first turntable comes into contact with the spring portion of the second holding member, causing the second holding member to also rotate in the predetermined direction, placing the sheath stripping tool in a released state. This releases the electric wire from the holding member.

[0011] Therefore, with this configuration, the insulation stripping device connected to the remote control rod can be brought close to an electric wire suspended in the air from the ground or from a work vehicle, and then by simply rotating the turntable by remotely rotating the remote control rod, the electric wire can be held and the insulating coating of the electric wire can be easily stripped with the stripping blade, and the electric wire can be released after the work is completed.

[0012] In other words, it is not necessary to perform the operation of suspending the tip hook of the opening / closing operation rod on an operation ring and rotating the operation ring to rotate the advance / retract shaft and advance the holding member toward the electric wire holding part, which was necessary in conventional sheath stripping devices, thereby improving workability. Also, in the present invention, a recess may be formed in the first rod body, and a knob portion that can be inserted into the recess may be formed in the first holding member.

[0013] The coating stripping method according to the present invention is a coating stripping method for stripping the insulating coating of an electric wire using the coating stripping device described above, and is characterized by including: an attachment step of attaching the coating stripping tool in an released state to the second turntable and attaching the rotation drive tool to the remote control rod; an accommodating step of accommodating the electric wire strung in the air into the electric wire accommodating space; a holding step of using the remote control rod to rotate the first turntable in a predetermined direction to bring the blades into contact with the protrusions, thereby holding the electric wire; a stripping step of using the remote control rod to rotate the first turntable in the predetermined direction to rotate the coating stripping tool around the central axis of the electric wire, thereby causing the stripping blades to strip the insulating coating; a release step of using the remote control rod to rotate the first turntable in a direction opposite to the predetermined direction to bring the blades into contact with the protrusions, thereby releasing the electric wire; and a detaching step of detaching the electric wire strung in the air from the electric wire accommodating space.

[0014] According to the above-described coating stripping device and coating stripping method using the same, the coating stripping device connected to the remote control rod is brought close to an electric wire suspended in the air from the ground or from a work vehicle, and then the remote control rod is remotely rotated to rotate the turntable, which simply holds the electric wire and allows the insulating coating of the electric wire to be easily stripped with the stripping blade, and the electric wire can be released after the work is completed.

[0015] Fig. 1 is a perspective view for explaining an overview of a coating stripping device according to an embodiment of the present invention. Fig. 2 is an enlarged perspective view for explaining an overview of the coating stripping device shown in Fig. 1. Fig. 3 is a side view for explaining the structure of the coating stripping device shown in Fig. 2. Fig. 4 is a front view for explaining the structure of the coating stripping device shown in Fig. 2. Fig. 5 is a view for explaining the structure of a coating stripping tool. Fig. 6 is a perspective view for explaining the structure of a rotary drive tool. Fig. 7 is a front view for explaining the structure of a conventional coating stripping device.

[0016] The best mode for carrying out the coating stripping device of the present invention will be described in detail below with reference to the drawings. Note that the embodiments disclosed below are illustrative in all respects and should not be considered limiting. The technical scope of the present invention is defined by the claims, not by the content disclosed in the embodiments, and should be understood to include all modifications within the scope and meaning equivalent to the claims.

[0017] First, the structure of a sheath stripping device according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view illustrating an overview of the sheath stripping device according to the embodiment of the present invention. Fig. 2 is an enlarged perspective view illustrating an overview of the sheath stripping device shown in Fig. 1. Fig. 3 is a side view illustrating the structure of the sheath stripping device shown in Fig. 2, and Fig. 4 is a front view illustrating the structure of the sheath stripping device shown in Fig. 2. Note that Figs. 1 to 4 show the wire insertion / removal opening in an open state. The vertical direction is defined as the Z direction, a direction perpendicular to the Z direction is defined as the X direction, and a direction perpendicular to the Z direction and the X direction is defined as the Y direction.

[0018] The sheath stripping device (1) of the present invention is configured by attaching a sheath stripping tool (10) to a rotary drive tool (20), and by operating a remote control rod (2) connected to the rotary drive tool (20), the sheath stripping tool (10) is rotated around the central axis of the electric wire A, and the stripping blade (18) of the sheath stripping tool (10) spirally strips the insulating sheath from the middle or end of the electric wire A suspended in the air.

[0019] <Coating Stripper> Figure 5 is a diagram illustrating the structure of a coating stripper. Figure 5(a) is a perspective view illustrating the structure of the coating stripper, and Figure 5(b) is a side view illustrating the structure of the coating stripper shown in Figure 5(a). The coating stripper (10) comprises a first holding member (11) having a knob portion (19), and a second holding member (12) having a peeling blade (18) and a blade portion (17).

[0020] The first holding member (11) is formed with a cylindrical first hole (11b) extending in the X direction and a cylindrical second hole (11c) extending in the X direction. Thus, a first rod (26b) of a rotation drive device (20) (described later) is inserted into the first hole (11b) and the second rod (26c) is inserted into the second hole (11c), thereby non-rotatably attaching the first holding member (11) to the rotation drive device (20). Furthermore, the first rod (26b) is removed from the first hole (11b) and the second rod (26c) is removed from the second hole (11c), thereby removing the first holding member (11) from the rotation drive device (20). In other words, the first holding member (11) is configured to be detachably attached to the rotation drive device (20).

[0021] The knob portion (19) is connected to the first hole (11b) and configured to be movable in the Y direction within a cylindrical hole extending in the Y direction. Thus, when the first rod body (26b) is inserted into a predetermined position within the first hole (11b), an operator or the like grasps the knob portion (19) and moves it in the Y direction into a recess (26d) formed in the first rod body (26b), which will be described later, to insert the first rod body (26b). In other words, the first holding member (11) is fixed in a predetermined position (unable to move in the X direction). Furthermore, a semi-cylindrical wire holding recess (11a) having a central axis in the X direction is formed on the inner circumferential surface (top surface) of the first holding member (11).

[0022] The second holding member (12) is connected to the first holding member (11) so as to be rotatable (openable and closable) around the X-direction as a rotation axis. The second holding member (12) is also formed with triangular plate-shaped blades (17) that protrude in the Y-direction (outward). This allows the second holding member (12) to be switched between a holding state (see FIG. 7 ) in which the electric wire A is clamped between the first holding member (11) and the second holding member (12) and a release state (see FIG. 5 ) in which an electric wire insertion / removal opening is formed and the electric wire A can be inserted / removed through the electric wire insertion / removal opening. The switching between the holding state and the release state is performed by the blades (17) coming into contact with protrusions (21c) of the rotation driver (20) described below. While the present embodiment describes a case in which the blades (17) are triangular plates, the shape of the blades is not particularly limited and may be a rectangular plate or a shape including a circular arc.

[0023] The second holding member (12) has an inner peripheral surface (lower surface) formed with a semi-cylindrical wire holding recess (12a) having a central axis in the X direction. That is, when in the holding state, the intermediate portion of the wire A can be accommodated and held in the cylindrical space formed by the wire holding recesses (11a) and (12a).

[0024] A spiral feeding protrusion (not shown) is formed on the inner peripheral surface of the electric wire holding recesses (11a) and (12a) so as to be continuous between the electric wire holding recesses (11a) and (12a). As a result, when the sheath stripping tool (10) rotates around the central axis of the electric wire A, the housed and held electric wire A is fed in a predetermined direction.

[0025] The second holding member (12) is provided with an attachment opening (18b) for arranging the stripping blade (18), and the stripping blade (18) is attached so that its cutting edge protrudes from the attachment opening (18b) by a predetermined distance into the cylindrical space formed by the wire holding recesses (11a) and (12a) at a predetermined inclination angle (predetermined forward angle) corresponding to the spiral inclination of the feeding projection. The insulating coating stripped by the stripping blade (18) is discharged to the outside through the attachment opening (18b).

[0026] <Rotational drive tool> Fig. 6 is a perspective view illustrating the structure of the rotational drive tool. The rotational drive tool (20) is configured to include a turntable (28) having a first turntable (21) and a second turntable (26), a case (27) that rotatably holds the turntable (28), and a rotation transmission unit (30) that transmits the rotation of the rotation shaft of the remote control wand (2) to the rotation of the turntable (28).

[0027] <First Turntable of Rotary Drive Device> As shown in Fig. 3 , the first turntable (21) is a flat plate having a C-shape in a side view, on the outer circumferential surface of which teeth are provided to mesh with a pinion (37) described below, and in which a space having a circular cross section is formed in the center, opening on one side as an electric wire accommodating space (21a) capable of accommodating an electric wire A. The diameter of the electric wire accommodating space (21a) and the width of the opening are set larger than the diameter of the electric wire A, and the electric wire accommodating space (21a) is a space for accommodating the electric wire A, and the opening functions as an electric wire insertion / removal opening (21b) that allows the electric wire A to be inserted into the electric wire accommodating space (21a) and to be removed from the electric wire accommodating space (21a). In addition, the case (27) that rotatably holds the first turntable (21) also has an opening having a shape similar to the electric wire insertion / removal opening (21b), and when the electric wire insertion / removal opening (21b) is positioned at the opening of the case (27), the electric wire A can be inserted and removed through the electric wire insertion / removal opening (21b).

[0028] The first turntable (21) is provided with an oscillation shaft (23), and an opening / closing gear piece (22) is attached so as to be able to oscillate around the oscillation shaft (23). The opening / closing gear piece (22) has an outer peripheral surface formed in an arc shape with the same diameter as the outer diameter of the first turntable (21), and teeth of the same shape as those of the first turntable (21) are provided on the outer peripheral surface. A part of the first turntable (21) is cut out at a portion of the first turntable (21) where the opening / closing gear piece (22) is attached to enable the opening / closing gear piece (22) to be attached and oscillate, and a part of the first turntable (21) is cut out at a portion of the first turntable (21) that receives and engages with the tip of the opening / closing gear piece (22) to receive the opening / closing gear piece (22). In this way, when the opening / closing gear piece (22) is engaged with the first rotating disk (21) (the electric wire insertion / removal port (21b) is in a closed state), the first rotating disk (21) and the opening / closing gear piece (22) are configured to be rotated and driven as a single gear.

[0029] Ball plunger mechanisms (24a) and (24b) are provided as holding means on the side of the first rotating disk (21) adjacent to the swing shaft (23) and the side (the notched portion) opposite the swing shaft (23) that is close to the wire insertion / removal opening (21b). When the opening / closing gear piece (22) is pulled out from the opening of the case (27) to open the wire insertion / removal opening (21b), the ball plunger mechanism (24a) is activated to hold the wire insertion / removal opening (21b) in the open state. Since the wire insertion / removal opening (21b) is aligned with the opening of the case (27) when the wire insertion / removal opening (21b) is open, the wire A can be inserted into the wire accommodating space (21a) and housed therein. In addition, when the opening / closing gear piece (22) is pressed toward the wire insertion / removal opening (21b), the ball plunger mechanism (24a) is released, the opening / closing gear piece (22) engages with the notched portion of the first turntable (21), and the ball plunger mechanism (24b) is activated, thereby holding the wire insertion / removal opening (21b) in a closed state.

[0030] Furthermore, after the insulating coating stripping operation using the coating stripper (10) is completed, the first turntable (21) is rotated in the direction opposite to the predetermined direction (counterclockwise in FIG. 3) using the remote control rod (2) until it reaches a predetermined position (initial position), whereby the ball plunger mechanism (24b) is released, causing the opening / closing gear piece (22) to swing and separate from the first turntable (21), opening the wire insertion / removal opening (21b), and thereby allowing the wire A to be removed from the wire accommodating space (21a). Also, a cylindrical protrusion (21c) having a central axis in the X direction is formed on the first turntable (21). As a result, when the first turntable (21) rotates in a predetermined direction (clockwise in Figure 3), the protrusion (21c) rotates in the predetermined direction (clockwise in Figure 3) together with the first turntable (21), and conversely, when the first turntable (21) rotates in the direction opposite to the predetermined direction (counterclockwise in Figure 3), the protrusion (21c) also rotates in the direction opposite to the predetermined direction (counterclockwise in Figure 3). When the coating remover (10) is attached, the protrusion (21c) rotates in a predetermined direction (clockwise in FIG. 3) and comes into contact with one side of the triangular plate-shaped blade portion (17), causing the second holding member (12) to rotate in the predetermined direction (clockwise in FIG. 3), and conversely, when the protrusion (21c) rotates in the opposite direction to the predetermined direction (counterclockwise in FIG. 3) and comes into contact with the other side of the triangular plate-shaped blade portion (17), causing the second holding member (12) to rotate in the opposite direction to the predetermined direction (counterclockwise in FIG. 3). Note that, although the present embodiment describes a case where the protrusion (21c) has a cylindrical shape, the shape of the protrusion is not particularly limited and may be a square prism or an elliptical cylinder.

[0031] <Second Turntable of Rotary Drive Device> The second turntable (26) has a circular cross-sectional space in the center, which is open on one side and serves as an electric wire accommodating space (26a (21a)) capable of accommodating an electric wire A. The second turntable (26) is a C-shaped body slightly smaller than the first turntable (21) in a side view, and is disposed on the inner peripheral surface and both side surfaces of the first turntable (21) in a front view. As shown in FIG. 4 , an annular flange (26e) is provided on the outer side of the peripheral surface of the second turntable (26) (the side opposite to the surface attached to the first turntable (21)), and an annular recess is formed between the side surface of the first turntable (21) and the flange (26e) of the second turntable (26). The edge of the case (27) is fitted into this annular recess, so that the first turntable (21) and the second turntable (26) are rotatably fitted to the case (27). The second turntable (26) is formed with a cylindrical first rod (26b) having a central axis in the X direction and a cylindrical second rod (26c) having a central axis in the X direction. A recess (26d) is formed on the outer peripheral surface of the first rod (26b). As a result, when the second turntable (26) rotates in a predetermined direction (clockwise in FIG. 3), the first rod (26b) and the second rod (26c) also rotate in the predetermined direction (clockwise in FIG. 3) together with the second turntable (26). When the second turntable (26) rotates in the direction opposite to the predetermined direction (counterclockwise in FIG. 3), the first rod (26b) and the second rod (26c) also rotate in the direction opposite to the predetermined direction (counterclockwise in FIG. 3).

[0032] <Case of rotary drive device> The case (27) covers the first turntable (21) and the pinion (37), and is cut out to correspond to the wire insertion / removal openings (26b) of the first turntable (21) and the second turntable (26), and rotatably holds the first turntable (21) and the second turntable (26) in the openings.

[0033] <Rotation transmission part of rotary driving device> The rotation transmission part (30) includes a support base (31) having an L-shaped cross section, a support tube (32) attached below the bottom part (31 a) of the support base (31), a first bevel gear (33) and a second bevel gear (34) that mesh with each other perpendicularly, a connecting rotation shaft (35) connected to the axis of the first bevel gear (33), and a cover (36) that has a right-angled triangular shape in a side view and covers these components, and further includes a pinion (37) provided coaxially with the second bevel gear (34) inside the case (27).

[0034] The support cylinder (32) is a cylindrical body that receives the tip of the remote control rod (2) inside, thereby supporting the coating stripping device (1) with the remote control rod (2).

[0035] The first bevel gear (33) is rotatably supported in a hole formed in the center of the bottom portion (31 a) of the support base (31), and the gear portion (33 a) is disposed above the bottom portion (31 a) of the support base (31). The second bevel gear (34) is rotatably supported in a hole formed in the center of the side portion (31 b) of the support base (31), and the gear portion (34 a) is disposed laterally on the side portion (31 b) of the support base (31) and meshes with the gear portion (33 a) of the first bevel gear (33). The shaft portion (34 b) on the opposite side to the gear portion (34 a) protrudes from the side portion (31 b) of the support base (31) and passes through the case (27), and a pinion (37) is attached to the shaft portion (34 b). The connecting rotation shaft (35) is positioned on the central axis of the support tube (32), and its upper end is joined to the axial center portion (33b) of the first bevel gear (33), while its lower end is provided with a head (35b) that is hexagonal in cross section for engaging with the rotation shaft of the remote control rod (2).

[0036] <Remote Control Rod> A well-known remote control rod is used as the remote control rod (2). The remote control rod (2) has a rod-shaped cylindrical body of a predetermined length and has a rotating shaft inside. When the handle (2a) at hand is rotated, the rotation of the handle (2a) is transmitted to the rotating shaft via a bevel gear. By inserting the tip of the remote control rod (2) into the support cylinder (32), the tip of the rotating shaft of the remote control rod (2) is connected to the connecting rotating shaft (35) (head 35b), and the coating stripping device (1) can be supported at the tip of the remote control rod (2). In this state, by rotating the handle (2a) at the hand of the remote control rod (2), the connecting rotation shaft (35) is rotated, which rotates the first bevel gear (33) joined to the connecting rotation shaft (35) and the second bevel gear (34) meshing therewith, and further rotates the pinion (37) attached coaxially with the second bevel gear (34), which in turn rotates the coating stripping tool (10) attached via the turntable (28) meshing with the pinion (37).

[0037] At this time, by rotating the handle (2a) of the remote control rod (2) in a predetermined direction, the connecting rotation shaft (35) is rotated in the predetermined direction, the first bevel gear (33) joined to the connecting rotation shaft (35) and the second bevel gear (34) meshing therewith are rotated in the predetermined direction, and further the pinion (37) attached coaxially with the second bevel gear (34) is rotated in the predetermined direction, and the coating stripping tool (10) attached via the turntable (28) meshing with the pinion (37) is rotated in the predetermined direction. Conversely, by rotating the handle of the remote control rod (2) in the direction opposite to the predetermined direction, the connecting rotation shaft (35) is rotated in the direction opposite to the predetermined direction, the first bevel gear (33) joined to the connecting rotation shaft (35) and the second bevel gear (34) meshing therewith are rotated in the direction opposite to the predetermined direction, and the pinion (37) attached coaxially with the second bevel gear (34) is rotated in the direction opposite to the predetermined direction, and the first turntable (21) meshing with the pinion (37) is rotated in the direction opposite to the predetermined direction.

[0038] <Method for Stripping Electric Wire> Next, a method for stripping the insulation from the electric wire A using the insulation stripping device (1) of the present invention will be briefly described here, as some of the description overlaps with the above description.

[0039] The coating stripping method includes an attaching step (A), a containing step (B), a holding step (C), a peeling step (D), a releasing step (E), and a detaching step (F).

[0040] (A) Attachment step: First, with the sheath stripper (10) in an open state, the first rod (26b) of the rotary drive tool (20) is inserted into the first hole (11b), and the second rod (26c) is inserted into the second hole (11c), thereby attaching the sheath stripper (10) to the rotary drive tool (20). Then, when the first rod (26b) is inserted into a predetermined position in the first hole (11b), the knob portion (19) is inserted into the recess (26d) formed in the first rod (26b). Next, the tip of the remote control rod (2) is inserted into the support tube (32) of the rotary drive tool (20) to support the sheath stripper (1), and the tip of the rotation operation means of the remote control rod (2) is connected to the connecting rotation shaft (35).

[0041] (B) Storage step: The wire insertion / removal opening (21b) of the first turntable (21) of the rotary drive tool (20) is opened (the open state is maintained by the ball plunger mechanism (24)), and the sheath stripping device (1) is brought close to the middle part of the wire A suspended in the air, and the middle part of the wire A is stored in the wire storage space (21a).

[0042] (C) Holding Process: The connecting rotary shaft (35) is rotated in a predetermined direction by remote control from the rotation operating means of the remote control rod (2). This rotational force is transmitted to the first turntable (21) via the rotation transmitting unit (30), causing the first turntable (21) to rotate in the predetermined direction. When the protrusion (21c) rotates in the predetermined direction and comes into contact with the blade (17), the second holding member (12) rotates in the predetermined direction. Accordingly, the sheath stripping tool (10) enters a holding state, the electric wire A is clamped between the first holding member (11) and the second holding member (12), and the stripping blade (18) bites into the insulating sheath B (see FIG. 7 ). When the opening of the case (27) and the opening of the second turntable (26) are aligned, the contact area between the case (27) and the second turntable (26) increases, resulting in increased frictional resistance and making it difficult for the second turntable (26) to rotate relative to the case (27).

[0043] (D) Stripping process: The connecting rotary shaft (35) is rotated in a predetermined direction by remote control from the rotation operating means of the remote control rod (2), and this rotational force is transmitted to the first turntable (21) via the rotation transmitting unit (30), causing the first turntable (21) to rotate in the predetermined direction. When the protrusion (21c) rotates in the predetermined direction and comes into contact with the blade portion (17), the holding insulation stripping tool (10) rotates in the predetermined direction around the central axis of the electric wire A together with the second turntable (26). As a result, the stripping blade (18) strips the insulating coating B with its blade width.

[0044] (E) Release step: The second turntable (26) is placed in a predetermined position (initial position) relative to the case (27). That is, the wire insertion / removal opening (26b) is aligned with the opening of the case (27). The connecting rotation shaft (35) is then rotated in a direction opposite to the predetermined direction by remote control from the rotation operating means of the remote control rod (2). This rotational force is transmitted to the first turntable (21) via the rotation transmission unit (30), causing the first turntable (21) to rotate in the opposite direction. When the protrusion (21c) rotates in the opposite direction and contacts the blade portion (17), the second holding member (12) rotates in the opposite direction. This causes the insulation stripping tool (10) to enter a released state. The wire insertion / removal opening (21b) opens, allowing the insulation stripping device (1) to be detached from the wire A.

[0045] (F) Removal step The sheath stripping device (1) is removed from the middle part of the electric wire A suspended in the air.

[0046] According to the above-described coating stripping device (1) and coating stripping method using the same, the coating stripping device (1) connected to the remote control rod (2) is brought close to the electric wire A suspended in the air from the ground or from a work vehicle, and then the remote control rod (2) is remotely rotated to rotate the turntable (28), thereby holding the electric wire A and easily stripping the insulating coating of the electric wire A with the stripping blade (18), and the electric wire A can be released after the work is completed.

[0047] The present invention can provide a coating stripping device that strips the insulating coating of an electric wire used in a high-voltage overhead line or the like.

[0048] REFERENCE SIGNS LIST 1 Coating stripping device 2 Remote control rod 10 Coating stripping tool 11 First holding member 12 Second holding member 17 Blade portion 18 Skinning blade 20 Rotation drive tool 21 First turntable 21c Protrusion 22 Second turntable 27 Case