Coating removal tools

Abstract

The present invention provides a coating removal tool that can reliably and smoothly discharge the coating of a coated conductor, which has been removed by a cutting blade provided inside, from an outlet. [Solution] The coating removal tool 1 consists of a coating removal member 10 and a receiving member 30. The coating removal member 10 has an insertion opening 11 into which the end of the coated conductor 50 is inserted, a cutting blade that makes a cut in the coating 52, and a discharge opening 19 for discharging the cut coating 52 to the outside. The receiving member 30 has assembly parts on both ends to which the coating removal member 10 can be assembled, and hollow parts that open on both ends to receive the end of the conductor 51 that has passed through the cutting blade 16. In addition, a restricting wall 20 is provided between the discharge opening 19 and the opening of the hollow part to restrict the cut coating 52 from entering the hollow part from the opening. This ensures that the removed coating 52 is reliably discharged from the discharge opening 19 and can be removed smoothly.

Description

[Technical Field]

[0001] The present invention relates to a coating removal tool for removing the coating from the end of a coated conductor, such as a power cable or optical cable, which is covered with an insulator, to expose the conductor core. [Background technology]

[0002] When branching or connecting the aforementioned cable, which has a conductor covered with an insulating sheath, the sheath at the end of the cable is removed to expose the conductor inside the cable. This is done using wire cutters, knives, etc., but removing the sheath is a troublesome, time-consuming, and dangerous task. For this reason, a tool has been developed that has a cutting blade inside and removes the sheath by inserting the cable through the insertion opening and rotating it around the insertion axis, as disclosed in Patent Document 1, for example.

[0003] The sheathing removal tool described in Patent Document 1 comprises a gripping section 61 and a sheathing removal section 62 having a cutting blade 63 and a scooping section 64, which is detachably attached to the gripping section 61, as shown in Figure 11. For illustrative purposes, in Figure 11, the sheathing removal tool 60 is shown with the gripping section 61 and one of the sheathing removal sections 62 separated. The gripping section 61 is equipped with a stopper that determines the length of the sheathing to be removed. The sheathing removal section 62 makes an incision in the sheathing of the cable inserted into the insertion passage 65 from the central insertion opening at the end of the gripping section 61 with the cutting blade 63, scoops up the sheathing with the scooping section 64 and peels it off in a spiral, and the peeled sheathing is discharged to the side from an outlet 66 that communicates with the outside. The sheathing removal tool 60 uses the gripping section 61 to share multiple types of sheathing removal sections 62 that correspond to different cable sizes. Here, the gripping portion 61 is designed to accommodate the largest diameter conductor among cables of different sizes, thereby enabling shared use. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2018-196254 [Overview of the project] [Problems that the invention aims to solve]

[0005] The sheathing removal tool 60 described in Patent Document 1 allows for smooth sheathing removal, especially in cables with relatively little restoring force that tries to return the stripped sheathing to its original shape, such as CV cables widely used for low-voltage general power wiring, as the stripped sheathing moves towards the discharge port 66 as the scooping portion 64 scoops it up.

[0006] On the other hand, cables with a relatively strong restoring force that tries to return to their original shape after being stripped, such as PDC cables used for lowering from high-voltage overhead power lines to the primary side of pole-mounted transformers, may return to their original coiled shape even after being scooped up by the scooping part 64. Instead of moving towards the discharge port 66, they may be pulled inward into the gripping part 61, following the conductor of the pushed-in PDC cable, making it difficult to remove the insulation smoothly.

[0007] Furthermore, when the stripped insulation attempts to return to its original shape, the thicker the cable and the smaller the curvature of its outer surface, the larger the diameter spiral it forms, making it easier to move to the outlet 66. However, when the cable is thin and the curvature of its outer surface is large, it attempts to return to its original shape, forming a smaller spiral with a smaller diameter, making it difficult to guide to the outlet 66. In other words, in addition to differences in material properties and wall thickness, differences in diameter can also make it difficult to remove the insulation smoothly from the cable.

[0008] Therefore, the present invention aims to provide a coating removal tool that can reliably and smoothly discharge the coating of a coated conductor, which has been removed by a cutting blade provided inside, from an outlet. [Means for solving the problem]

[0009] The coating removal tool according to claim 1 is for removing coating from a coated conductor, A coating removal member having an insertion opening into which the end of the coated conductor is inserted, a cutting blade that moves axially while rotating relative to the coated conductor inserted from the insertion opening to make a spiral cut in the coating, and a discharge opening for discharging the cut coating to the outside, It consists of a receiving member having an assembly portion on at least one end to which the coating removal member can be assembled, and a hollow portion that opens on the one end and receives the end of the coated conductor that moves through the cutting blade, The opening of the hollow portion is larger than the outer shape of the conductor of the covered conductor, and the tip of the covered conductor, from which the coating has been removed after passing through the cutting blade, can enter in a straight line. Between the discharge port and the opening of the hollow section, a restricting wall is provided that covers a portion of the opening, leaving space through which the conductor of the covered conductor can pass, and restricts the cut-out covering from entering the hollow section from the opening. Here, the receiving member has an assembly part that can be attached to one end, but "one end" broadly means "end side" and does not strictly mean only one end, but also includes cases where it can be attached to both ends of the receiving member.

[0010] As a result, the opening of the hollow part of the receiving member is larger than the outer shape of the conductor of the covered conductor, allowing the end of the conductor to smoothly enter the opening without getting caught or snagged on the periphery of the opening. Furthermore, the restricting wall prevents the coating cut by the cutting blade from entering the hollow section, thus ensuring that the cut coating is reliably moved towards the discharge port.

[0011] The coating removal tool according to claim 2 comprises, in particular, a separate body in which the restricting wall can be separated from the receiving member. This allows the regulating wall to be separated from the receiving member after the covering is removed, thereby widening the opening in the hollow section and making maintenance such as removing blockages inside the hollow section easier. The coating removal tool according to claim 3 is further characterized in that the restricting wall is detachably assembled to the coating removal member. Thus, by removing the coating removal member, the restriction wall is also removed from the receiving member at the same time. Therefore, the opening of the hollow portion can be widely opened by a series of operations associated with the operation of removing the coating removal member. For this reason, it is easy to perform maintenance such as clogging inside the hollow portion. Further, after the coating is removed, by removing the restriction wall from the coating removal member, it is easy to perform maintenance such as removing the coating remaining caught on the cutting blade.

[0012] The coating removal tool according to claim 4 is particularly provided with a scooping portion for scooping up the cut coating between the cutting blade and the restriction wall. The coating removal tool according to claim 5 is particularly provided such that the scooping portion extends from the cutting blade toward the restriction wall, and a filling portion extends from the restriction wall side toward the tip of the scooping portion on the restriction wall side to fill the gap between the tip of the scooping portion on the restriction wall side and the restriction wall. The coating removal tool according to claim 6 is particularly provided with a discharge guiding auxiliary portion formed on the restriction wall and inclined toward the discharge port side to guide the cut coating to the discharge port.

[0013] The coating removal tool according to claim 7 is a coating removal tool capable of removing the coating of two types of coated conductors having different outer diameters and conductor diameters. Similar to claim 1, a restriction wall is provided between the discharge port of the coating removal member and the opening of the hollow portion of the receiving member to cover a part of the opening and restrict the cut coating from entering the hollow portion from the opening.

Advantages of the Invention

[0014] In the present invention, since the restriction wall restricts the cut coating from entering the hollow portion, the cut coating surely moves to the discharge port of the coating removal member and is discharged to the outside. Thereby, regardless of the material characteristics, wall thickness of the coating, outer diameter of the coated conductor, etc., the coating can be smoothly removed from the coated conductor.

Brief Description of the Drawings

[0015] [Figure 1]It is a perspective view of the coating removal tool of the embodiment of the present invention. [Figure 2] The coating removal tool of FIG. 1 is shown, (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view taken along the cutting line A-A of (a). [Figure 3] It is a partially exploded perspective view of the coating removal tool of FIG. 1. [Figure 4] The coating removal member of FIG. 1 is shown, (a) is a plan view, (b) is a perspective view, (c) is a front view, and (d) is a cross-sectional view taken along the cutting line B-B of (a). [Figure 5] The regulating wall of FIG. 1 is shown, (a) is a perspective view seen from one end side, (b) is a perspective view seen from the other end side, (c) is a front view, and (d) is a cross-sectional view taken along the cutting line C-C of (c). [Figure 6] The removal length setting member of the receiving member of FIG. 2 is shown, (a) is a perspective view and (b) is a front view. [Figure 7] It is a perspective view of the coated conductor to be coated-removed by the coating removal tool of the present invention. [Figure 8] It is a table showing the specifications of the PDC cable to be coated-removed by the coating removal tool of the present invention. [Figure 9] The state where the coating of the coated conductor is removed by the coating removal tool of FIG. 1 is shown, (a) is a plan view, and (b) is a cross-sectional view taken along the cutting line D-D of (a). [Figure 10] It is a perspective view showing the state where the coating peeled off by the coating removal tool of FIG. 1 is discharged. [Figure 11] It is a partially exploded perspective view of a conventional coating removal tool.

Embodiments for Carrying out the Invention

[0016] Hereinafter, the coating removal tool of the embodiment of the present invention will be described based on the drawings. As shown in Figures 1 to 3, the coating removal tool of this embodiment consists of a coating removal member 10 that cuts and removes the coating from a coated conductor, and a receiving member 30 to which the coating removal member 10 is assembled, and which receives the end of the conductor that has been removed and is moving into the receiving member 30. A restricting wall 20 is provided between the discharge port 19 of the coating removal member 10 and the opening 34 of the hollow portion 33 of the receiving member 30 to restrict the removed coating from entering the inside of the receiving member 30. The coating removal member 10 has an insertion port 11 into which the end of the coated conductor is inserted, and by rotating it relative to the coated conductor inserted from the insertion port 11, it makes a cut with a cutting blade 16 and removes the coating. In this embodiment, the coating removal tool 1 is shown as an example in which coating removal members 10A and 10B are provided on both the left and right sides of the central receiving member 30.

[0017] As shown in Figure 7, a covered conductor consists of a conductor 51 covered with an insulating sheath 52. Examples include CV cables, which are widely used for low-voltage general power wiring, and PDC cables, which are used for downlinking from high-voltage overhead power lines to the primary side of pole-mounted transformers. For example, as shown in Figure 7(a), a PDC cable has a conductor 51 made of several thin wires bundled together and covered with an insulating sheath 52. Similarly, as shown in Figure 7(b), a CV cable has a conductor 51 made of several thin wires and covered with an insulating sheath 52 made of cross-linked polyethylene resin and a vinyl resin sheath 54 on its outer circumference. In this embodiment, a PDC cable is used as an example of a covered conductor 50.

[0018] The specifications of the PDC cable are shown in the table in Figure 8. Of these, in the sheathing removal member 10 of this embodiment, the small diameter sheathing removal member 10A on the left side shown in Figures 1 to 3 has a nominal cross-sectional area of ​​8 mm². 2 An example of a tool used to remove the sheath 52 of a cable is shown, with the large-diameter sheath removal member 10B on the right being 22mm. 2 An example of a cable used for removing the sheath 52 is shown. Nominal cross-sectional area 8 mm 2 The cable has a finished outer diameter of 9.6 mm for the insulated conductor 50, a thickness of 3.0 mm for the insulation 52, and an outer diameter of 3.6 mm for the conductor 51, with a nominal cross-sectional area of ​​22 mm².2 The cable has a finished outer diameter of 12 mm for the insulated conductor 50, a thickness of 3.0 mm for the insulation 52, and an outer diameter of 6 mm for the conductor 51.

[0019] The pair of left and right insulation removal members 10A and 10B have different sizes of insertion openings 11, etc., to accommodate two types of insulated conductors 50 with different diameters and insulation thicknesses, but are generally formed to have similar shapes and forms. Each insulation removal member 10 is detachably assembled to the receiving member 30. Each insulation removal member 10 can be assembled by engaging an engaging portion 12, which is provided on the end opposite the insertion opening 11 toward the receiving member 30, with the engaged portion 32 of the receiving member 30.

[0020] The coating removal member 10 includes an insertion opening 11, a cutting blade 16 that makes spiral cuts in the coating 52 of the coated conductor 50 inserted through the insertion opening 11, a scooping part 18 that scoops up the coating 52 cut by the cutting blade 16, and an outlet 19 that discharges the cut coating 52 to the outside.

[0021] More specifically, as shown in Figures 3 and 4, the coating removal member 10 is generally formed in a cylindrical shape except for some notches, which form a coating removal space 14, and a cutting blade 16 and a scooping part 18 are provided within the coating removal space 14. The coating removal space 14 is formed as a space cut out at a slightly wider angle than 90 degrees around the axis of the coating removal member 10, and is the space in which the coating 52 is cut and scooped up.

[0022] The cutting blade 16 and the scooping portion 18, including the screw 15, are entirely housed within the coating removal space 14 so as not to interfere with the operation of the coating removal tool 1. A circular insertion opening 11 into which the cable 40 is inserted is formed in the center of the outer end of the coating removal member 10. The inner diameter of the insertion opening 11 for the small-diameter coating removal member 10A is set to 10 mm, and the inner diameter of the insertion opening 11 for the large-diameter coating removal member 10B is set to 12.4 mm. An insertion passage 13 with a circular cross-section is formed inside from the insertion opening 11. The insertion passage 13 penetrates from the insertion opening 11 toward the receiving member 30. The outer peripheral opening of the coating removal space 14 serves as an outlet 19 for removing the cut coating 52. The coating removal member 10 is integrally formed from synthetic resin material, except for the cutting blade 16 and the scooping portion 18.

[0023] Inside the sheathing removal space 14, a cutting blade fixing base 17 with an inclined surface is formed, and a cutting blade 16 is detachably fixed to this cutting blade fixing base 17 via screws 15. The cutting blade 16 is formed in a roughly rectangular plate shape and is positioned at an inclination in the vertical direction with respect to the insertion axis of the sheathed conductor 50. The lower end corner 16a of the cutting blade 16 protrudes into the insertion passage 13, and the amount of protrusion is set such that when removing the sheath 52 of the cable 40, the lower end corner 16a reaches the boundary between the conductor 51 and the sheath 52, that is, the sheath 52 is cut, but the conductor 51 is not reached and is not damaged.

[0024] The scooping section 18 is made of a rectangular plate and is integrally provided adjacent to the cutting blade 16 between the cutting blade 16 and the regulating wall 20, extending from the lower end edge 16b on the far side in the insertion direction of the cutting blade 16 toward the regulating wall 20.

[0025] Next, the receiving member 30 has assembly portions 31 at both ends to which the coating removal members 10 can be attached, and hollow portions 33 that open at both ends to receive the ends of the conductor 51 as it moves through the cutting blade 16. The opening 34 of the hollow portion 33 is formed with an inner diameter larger than 6 mm, which is the diameter of the conductor 51 in the coated conductor 50, which has a relatively larger diameter, so that the tip of the conductor 51 from which the coating 52 has been removed by the cutting blade 16 can enter in a straight line.

[0026] Furthermore, the receiving member 30 is equipped with a stopper portion 35 within the hollow portion 33, which allows the position of the tip of the conductor 51 to enter the conductor 51 and the length of the tip to enter to be set by the tip of the conductor 51 coming into contact with it. The receiving member 30 also functions as a gripping portion for holding by hand during the insulation removal work.

[0027] More specifically, the receiving member 30 is formed in a substantially cylindrical shape from a synthetic resin material. As shown in Figures 1-3, an elongated hole 36 is formed on the upper surface along the axial direction, and the central part has a curved surface that is recessed inward to facilitate gripping by hand. Inside the receiving member 30, a removal length setting member 37, which is cylindrical in shape and sets the length of the covering 52 to be removed, is disposed to reciprocate along the axial direction of the gripping part 31. An operating part 38 for operating the movement is provided at the upper center of the removal length setting member 37, and a gripping part 39 at its upper end protrudes upward from the elongated hole 36.

[0028] As shown in Figure 6, a rectangular plate portion 40 is disposed below the knob portion 39, and on its upper surface is an engaging projection 42 that detachably engages with a plurality of rectangular engagement holes 41 formed below both sides of the elongated hole 36 and arranged in a comb-like pattern. Below the rectangular plate portion 40, a leaf spring material 43 is attached inside the removal length setting member 37. By pushing down the knob portion 39 against the elastic force of the leaf spring material 43, the engaging projection 42 moves below the engagement hole 41, releasing the engagement between the engaging projection 42 and the engagement hole 41, and the removal length setting member 37 becomes able to reciprocate along the longitudinal direction within the elongated hole 36. After moving the knob portion 39 a predetermined distance, releasing the push causes the engaging projection 42 to rise due to the biasing force of the leaf spring material 43 and engage with the engagement hole 41 again, and the removal length setting member 37 stops and is fixed in that position.

[0029] The left and right end faces of the removal length setting member 37 abut against the tip surface of the conductor 51 that has passed through the cutting blade 16, acting as stopper portions 35 that prevent the tip surface of the conductor 51 from moving further inward in the insertion direction within the hollow portion 33 beyond a predetermined position. Through this abutment and the movement of the removal length setting member 37, the length of the coating 52 to be removed at the end of the coated conductor 50, i.e., the length of the exposed conductor 51, can be arbitrarily set.

[0030] Next, the restricting wall 20 is detachably assembled to the coating removal member 10 and is provided separately between the discharge port 19 of the coating removal member 10 and the opening 34 of the hollow portion 33 of the receiving member 30, adjacent to the scooping portion 18.

[0031] The restricting wall 20 is integrally formed from synthetic resin or the like, and as shown in Figure 5, it has a donut-shaped annular plate portion 21 with a space 22 in the center of the disc consisting of a through hole through which the conductor 51 can pass. The annular plate portion 21 covers a part of the opening 34 of the receiving member 30, leaving the space 22 open. In this way, the restricting wall 20 prevents the cut-out covering 52 from entering the hollow portion 33 through the opening 34 of the receiving member 30.

[0032] A fan-shaped guide plate portion 23 extends from a part of the outer edge of the annular plate portion 21. The guide plate portion 23 is formed so that the left and right sides of the fan shape are spaced apart at an angle slightly wider than 90 degrees around the axis of the coating removal member 10, and extends from a part of the outer edge of the annular plate portion 21 in a direction perpendicular to the axis so as to close the end on the receiving member 30 side in the coating removal space 14. The guide plate portion 23 comes into contact with the cut-off coating 52 and guides it toward the discharge port 19.

[0033] On one side of the guide plate portion 23, the side facing the cutting blade 16, one end edge 23a of the fan shape has a filling portion 24 that extends radially along the end edge 23a and protrudes toward the tip edge on the far side in the insertion direction of the scooping portion 18. The filling portion 24 fills the gap between the regulating wall 20 and the tip edge of the scooping portion 18.

[0034] Furthermore, a discharge guide assist portion 25 is formed between the space 22 of the annular plate portion 21 and the guide plate portion 23, consisting of an inclined wall that slopes from the periphery of the space 22 toward the side 23b of the fan-shaped guide plate portion 23. The discharge guide assist portion 25 guides the cut-out covering 52 toward the discharge port 19.

[0035] At the boundary between the guide plate portion 23 and the annular plate portion 21 on the other side, an arc-shaped plate portion 26 is erected along the axis, extending in the direction of the receiving member 30 with the boundary portion as its base. When the coating removal member 10 is assembled to the receiving member 30, the arc-shaped plate portion 26 fits with a part of the assembly portion 31 of the receiving member 30.

[0036] The above embodiment has a notarized cross-sectional area of ​​8 mm 2 and 22mm 2 The specific dimensions of the PDC cable, as described in the claims, are as follows: In other words, the coating removal tool 1 has a nominal cross-sectional area of ​​8 mm², with different diameters for the conductor 51 and the coated conductor 50. 2 and 22mm 2 It is compatible with two types of PDC cables and allows for the removal of the sheath 52. It consists of a coating removal member 10 and a receiving member 30. The coating removal member 10 consists of two types: a small-diameter coating removal member 10A, whose insertion opening 11 has an inner diameter (10 mm) smaller than the outer diameter (12 mm) of the relatively large-diameter coated conductor 50; and a large-diameter coating removal member 10B, whose insertion opening 11 has an inner diameter (12.4 mm) larger than the outer diameter (12 mm) of the relatively large-diameter coated conductor 50. These two types can be selected and assembled to both ends of the receiving member 30. The opening 34 of the hollow portion 33 of the receiving member 30 is formed to be larger than the diameter of the conductor 51 of the covered conductor 50, which has a relatively larger diameter (6.0 mm). A restricting wall 20 is provided between the discharge port 19 and the opening 34 of the hollow section 33 to prevent the cut-out covering 52 from entering the hollow section 33 through the opening 34. With the small-diameter coating removal member 10A assembled to the receiving member 30, the restricting wall 20 covers the opening 34, leaving a space 22 (inner diameter 5.5 mm) that allows the conductor 51 (diameter 3.6 mm) of the coated conductor 50, which has a relatively small outer diameter, to pass through, but prevents the conductor 51 (diameter 6.0 mm) of the covered conductor 50, which has a relatively large outer diameter, from passing through. With the large-diameter coating removal member 10 assembled to the receiving member 30, the restricting wall 20 covers the opening 34, leaving a space 22 (inner diameter 7.5 mm) that allows the conductor 51 (diameter 6.0 mm) of the coated conductor 50, which has a relatively large outer diameter, to pass through.

[0037] Next, a method for removing the coating 52 from the coated conductor 50 using the coating removal tool 1 configured as described above will be explained.

[0038] First, the receiving member 30 of the insulation removal tool 1 is grasped by hand, and the insulated conductor 50 is inserted into the insertion passage 13 through the insertion opening 11 of the insulation removal member 10 until its tip surface contacts the cutting blade 16. Here, since the cutting blade 16 is positioned at an inclination in the vertical direction with respect to the insertion axis of the insulated conductor 50, when the tip surface of the insulated conductor 50 contacts the cutting blade 16, the tip surface of the insulated conductor 50 first contacts the uppermost part of the cutting blade 16 that protrudes into the insertion passage 13.

[0039] Then, when the tip surface of the insulated conductor 50 comes into contact with the cutting blade 16, the insulation removal tool 1 is rotated circumferentially relative to the insulated conductor 50, while the insulated conductor 50 is further pushed inward in the insertion direction. As a result, the cutting of the insulated conductor 50 begins at the uppermost part of the portion of the tip of the insulated conductor 50 that protrudes into the insertion passage 13 of the cutting blade 16, and the cutting proceeds from the tip of the insulation 52. The cut tip of the insulation 52 becomes a pointed wedge shape. Furthermore, because the relative rotation of the insulation removal tool 1 and the pushing of the insulated conductor 50 occur simultaneously, the insulation 52 is cut in a spiral pattern.

[0040] Next, as the coating removal tool 1 is rotated relative to the coating removal tool 1 and the coated conductor 50 is pushed in, the tip of the coated conductor 50 reaches the lower end corner 16a of the cutting blade 16, as shown in Figure 9. At this point, the lower end corner 16a of the cutting blade 16 reaches the boundary between the coating 52 and the conductor 51 of the coated conductor 50, and does not cut below that point. As a result, the outer surface of the conductor 51 is hardly damaged. Note that the receiving member 30 is not shown in Figure 9.

[0041] Thereafter, as the insulation 52 is cut in a spiral pattern, the cut insulation 52 is lifted up by the upper surface of the cutting blade 16 and moves towards the scooping section 18. In this way, the insulation 52, increasing in thickness as it is cut, rides up onto the scooping section 18 and is scooped up, and then is peeled off from the conductor 51 in a spiral pattern.

[0042] In this case, if the covered conductor 50 is a CV cable or the like, which has a relatively small restoring force that tries to return it to its original shape after being stripped, the stripped coating 52 moves smoothly to the discharge port 19 as it is scooped up by the scooping part 18 and is discharged to the outside. On the other hand, the PDC cable used in this embodiment has a relatively large restoring force that tries to return it to its original shape after being stripped, so unless special measures are taken, even if it is scooped up by the scooping part 18, it will return to its original shape and may move as if being pulled into the hollow part 33 from the opening 34 of the receiving member 30, following the pushed-in conductor 51. However, in this embodiment, a regulating wall 20 is provided between the discharge port 19 and the opening 34 of the hollow part 33 of the receiving member 30, so the regulating wall 20 comes into contact with the tip of the cut coating 52, preventing linear movement and reliably guiding the tip of the coating 52 towards the discharge port 19 and discharging it laterally.

[0043] Furthermore, at this time, the filling portion 24 of the regulating wall 20 fills the gap between the tip of the scooping portion 18 and the regulating wall 20, so that the cut-off covering 52 is reliably prevented from falling into this gap. In addition, the discharge guide auxiliary portion 25 of the regulating wall 20 guides the cut-off covering 52 to the discharge port 19, so that the covering 52 is smoothly guided to the discharge port 19 and discharged to the side.

[0044] Meanwhile, the conductor 51, from which the covering 52 has been removed, is guided into the hollow portion 33 through the opening 34 of the receiving member 30, and further insertion is prevented when the tip surface of the conductor 51 comes into contact with the stopper portion 35 of the removal length setting member 37. If only the covered conductor 50 is rotated in this state, the covered conductor 50 will make one full rotation at a fixed position in the insertion direction, and the cut covering 52 will be separated from the covered conductor 50. Then, the end of the covered conductor 50 from which the covering 52 has been removed will expose the conductor 51 for a predetermined length. With this, the removal of the covering 52 is completed.

[0045] Next, the operation of the coating removal tool 1 of this embodiment will be explained. The coating removal tool 1 can reliably move the cut coating 52 to the discharge port 19 of the coating removal member 10 and discharge it to the outside because the regulation wall 20 restricts the cut coating 52 from entering the hollow portion 33 by the cutting blade 16. Thereby, the coating 52 can be smoothly removed from the coated conductor 50.

[0046] In addition, since the opening 34 of the hollow portion 33 is larger than the outer shape of the conductor 51, the end portion of the conductor 51 can enter the opening 34 without being caught or snagged on the periphery of the opening 34.

[0047] In addition, the regulation wall 20 is detachably provided on the coating removal member 10, that is, it is formed as a separate body that can be separated from the receiving member 30. Therefore, the regulation wall 20 can be separated from the receiving member 30 to widely open the opening 34 of the hollow portion 33. Thereby, after removing the coating 52, it is easy to perform maintenance such as removing clogging in the hollow portion 33.

[0048] And since the regulation wall 20 is detachably provided on the coating removal member 10, when the coating removal member 10 is removed, the regulation wall 20 is also removed from the receiving member 30 at the same time. Thereby, in a series of operations associated with the operation of removing the coating removal member 10 from the receiving member 30, the opening 34 of the hollow portion 33 can also be widely opened, and it is easy to perform maintenance such as clogging in the hollow portion 33. Also, in the coating removal member 10, after removing the coating 52, it is easy to perform maintenance such as removing the coating 52 remaining caught on the cutting blade 16.

[0049] By the way, the coating removal tool 1 of the above embodiment describes the case of removing the coating 52 of the PDC cable having a nominal cross-sectional area of 8 mm 2 and 22 mm 2 However, when implementing the present invention, it is not limited to this PDC cable, and it is also applicable to PDC cables of other nominal cross-sectional areas.

[0050] Incidentally, the coating removal tool 1 of the above embodiment has a nominal cross-sectional area of 8 mm2 The small diameter coating removal member 10A has a nominal cross-sectional area of ​​8 mm 2 In addition to this cable, there is also one with a slightly smaller diameter and a nominal cross-sectional area of ​​5.5 mm². 2 It can also be used to remove the sheath of the cable 52, with a nominal cross-sectional area of ​​22mm². 2 The large-diameter coating removal member 10B has a nominal cross-sectional area of ​​22 mm². 2 In addition to this cable, there is also a slightly smaller diameter cable with a nominal cross-sectional area of ​​14mm². 2 It can also be used to remove the sheath 52 of the cable.

[0051] Furthermore, the dimensions of the coating removal tool 1, such as the insertion port 11 of the coating removal member 10, the opening 34 of the hollow portion 33 of the receiving member 30, and the space 22 of the restricting wall 20, are not limited to those of the above embodiment.

[0052] In addition, although a PDC coated conductor 50 is used as the coated conductor 50 in the above embodiment, other CV cables or the like may be used, and other cables such as optical cables may also be used in addition to these power cables.

[0053] Furthermore, in the above embodiment, the nominal cross-sectional area is 8 mm². 2 For use and 22mm 2 The example shown has the coating removal members 10 assembled on both ends of the receiving member 30, but the coating removal members 10 may be assembled on only one end of the receiving member 30, and the coating removal members 10 assembled on that end may be of different types selected or only one type.

[0054] If the coating removal member 10 is attached to only one end of the receiving member 30, then something other than the coating removal member 10 may be attached to the other end of the receiving member 30, for example, a tool with a rotating shaft protruding from the center of its end for insertion into the chuck of an electric rotary tool.

[0055] In addition, although the restricting wall 20 in the above embodiment is detachably assembled to the coating removal member 10, it may also be integrally fixed to the coating removal member 10. Furthermore, the restricting wall 20 may be assembled to the receiving member 30 instead of the coating removal member 10.

[0056] The scooping portion 18 is formed integrally with the cutting blade 16 by extending from it, but it may also be formed separately from the cutting blade 16. Furthermore, the scooping section 18 may be provided from the side of the regulating wall 20. Furthermore, if the tip of the coating 52 that has been stripped off by the cutting blade 16 moves naturally towards the discharge port 19 without being scooped up, the scooping part 18 is not necessarily required.

[0057] Furthermore, the regulating wall 20 has a filling portion 24 extending from it to fill the gap between it and the scooping portion 18, and is also provided with an auxiliary discharge guide portion 25 that guides the cut-out covering 52 to the discharge port 19, however, these filling portion 24 and auxiliary discharge guide portion 25 are not necessarily required.

[0058] In the above embodiment, the coating removal member 10 is assembled to the receiving member 30 by engagement, but it may be assembled by other means. [Explanation of Symbols]

[0059] 1: Coating removal tool, 10: Coating removal member, 10A: Coating removal member for small diameter, 10B: Coating removal section for large diameter, 11: Insertion port, 16: Cutting blade, 18: Scooping section, 19: Discharge port, 20: Regulating wall, 22: Space, 24: Filling section, 25: Discharge guide auxiliary section, 30: Receiving member, 31: Assembly section, 33: Hollow section, 34: Opening, 50: Coated conductor, 51: Conductor, 52: Coating.

Claims

1. A coating removal tool for removing coating from a coated conductor, A coating removal member having an insertion opening into which the end of the coated conductor is inserted, a cutting blade that moves axially while rotating relative to the coated conductor inserted from the insertion opening to make a spiral cut in the coating, and a discharge opening for discharging the cut coating to the outside, The receiving member comprises an assembly portion on one end to which the coating removal member can be assembled, and a hollow portion that opens on the one end and receives the end of the coated conductor that moves through the cutting blade. The opening of the hollow portion is larger than the outer shape of the conductor of the covered conductor, and the tip of the covered conductor, from which the coating has been removed after passing through the cutting blade, can enter in a straight line. A coating removal tool characterized in that a restricting wall is provided between the discharge port and the opening of the hollow part, covering a portion of the opening while leaving space through which the conductor of the coated conductor can pass, thereby restricting the cut coating from entering the hollow part from the opening.

2. The coating removal tool according to claim 1, characterized in that the restricting wall is a separate body that can be separated from the receiving member.

3. The coating removal tool according to claim 2, characterized in that the restricting wall is detachably assembled to the coating removal member.

4. The coating removal tool according to any one of claims 1 to 3, characterized in that a scooping portion for scooping up the cut coating is provided between the cutting blade and the restricting wall.

5. The scooping portion extends from the cutting blade toward the restricting wall, The coating removal tool according to claim 4, characterized in that a filling portion is extended from the side of the regulating wall toward the tip of the scooping portion toward the regulating wall in order to fill the gap between the tip of the scooping portion toward the regulating wall and the regulating wall.

6. The coating removal tool according to claim 5, characterized in that the regulating wall has an discharge guide assist portion formed thereon, which is inclined toward the discharge port and guides the cut coating toward the discharge port.

7. A coating removal tool capable of removing the coating from two types of coated conductors with different outer diameters and conductor diameters, A coating removal member having an insertion opening into which the end of the coated conductor is inserted, a cutting blade that moves axially while rotating relative to the coated conductor inserted from the insertion opening to make a spiral cut in the coating, and a discharge opening for discharging the cut coating to the outside, The receiving member comprises an assembly portion on one end to which the coating removal member can be assembled, and a hollow portion that opens on the one end and receives the end of the coated conductor that moves through the cutting blade. The coating removal member consists of two types: a small-diameter coating removal member whose insertion opening has an inner diameter smaller than the outer diameter of the coated conductor, which has a relatively larger outer diameter; and a large-diameter coating removal member whose insertion opening has an inner diameter larger than the outer diameter of the coated conductor, which has a relatively larger outer diameter. These two types can be selected and assembled to one end of the receiving member. The opening in the hollow portion of the receiving member is formed to be larger than the diameter of the covered conductor, which has a relatively larger diameter. Between the discharge port and the opening of the hollow section, a restricting wall is provided that covers a portion of the opening, leaving space through which the conductor of the covered conductor can pass, and restricts the cut-out covering from entering the hollow section from the opening. In the state in which the small-diameter coating removal member is assembled to the receiving member, the restricting wall covers the opening, leaving a space that allows the conductor of the coated conductor with a relatively small outer diameter to pass through, while preventing the conductor of the covered conductor with a relatively large outer diameter from passing through. A coating removal tool characterized in that, when the large-diameter coating removal member is assembled to the receiving member, the restricting wall covers the opening while leaving space to allow the conductor of the coated conductor, which has a relatively large outer diameter, to pass through.

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