Coating removal device

Abstract

A coating removal device includes: a plurality of contact portions configured to be in surface contact with an outer peripheral surface of a coated wire having a circular cross-section, the coated wire having a cutout formed in a circumferential direction on the outer peripheral surface, the contact portions configured to sandwich the coated wire; and a moving tool configured to move the plurality of contact portions sandwiching the coated electric wire and the coated electric wire relative to each other in a longitudinal direction of the coated electric wire. The plurality of contact portions are in surface contact with an end portion side of the coated electric wire closer to an end portion of the coated electric wire than the cutout, and relatively move toward an end portion side in a length direction of the coated electric wire so that a coating of the coated electric wire is peeled off.

Description

Technical Field

[0001] The present disclosure relates to a cover removing device for removing a cover of a covered electric wire. Background Art

[0002] There is known a cover removing device that removes a cover from an end portion of a covered electric wire so that a terminal can be connected to the end portion (see, for example, Patent Document 1).

[0003] Figure 8 This is an explanatory diagram for explaining a coating removal method using a conventional coating removal device. For example, Figure 8 The coating removal device shown removes Figure 7 The covered electric wire 10 is shown with a covering 11 and a metal foil 12. The covered electric wire 10 is an electric wire having a circular cross section, and has a structure in which a conductive core wire 15 is surrounded by an insulator 14, a braid 13, a metal foil 12, and an insulating covering 11.

[0004] Figure 8 The illustrated cover removal device includes a pair of cutters 16, each of which has a V-shaped blade portion 16a and a moving tool for moving these cutters 16. The pair of cutters 16 move toward each other and pierce the cover 11 and the metal foil 12 of the covered electric wire 10, and rotate in the arrow direction to make circumferential cuts in the cover 11 and the metal foil 12. Next, the pair of cutters 16 move toward the end in the length direction of the covered electric wire 10 to remove the portion of the cover 11 and the metal foil 12 closer to the end than the cut.

[0005] It should be noted that Figure 8 The black portion 18 in FIG. 1 represents a contact portion where the cutter 16 comes into contact with the coating 11 and the metal foil 12 when the cutter 16 moves toward the end portion in the longitudinal direction of the coated electric wire 10 and removes the coating 11 and the metal foil 12 .

[0006] Prior art

[0007] Patent Literature

[0008] Patent document 1: JP2015035278(A) Summary of the invention

[0009] Problems to be solved by the present invention

[0010] In the above-mentioned prior art, the portion where the cutter 16 contacts the covered electric wire 10 when the covering 11 and the metal foil 12 are peeled off is only Figure 8 Therefore, if the cover 11 is made of a soft material such as silicone, Fig. 9As shown, during peeling, only a portion of the cover 11 is deformed (turned up, etc.), and the peeling force cannot be transmitted thereto, resulting in a problem that peeling cannot be performed properly. In addition, when the removed portion of the cover 11 is long, the cover 11 is deformed due to the small area of ​​the contact portion 18, making it difficult to peel properly. Note that Fig. 9 Reference numeral 17 in the figure identifies a cutout.

[0011] Therefore, an object of the present disclosure is to provide a cover removing device capable of effectively removing the cover even when the cover is made of a soft material or when the removed portion of the cover is long.

[0012] Solutions to the problem

[0013] One aspect of the present disclosure is a covering removal device, which includes: a plurality of contact portions, which are configured to make surface contact with the outer peripheral surface of a covered electric wire having a circular cross-section, the covered electric wire having a cutout formed on the outer peripheral surface along a circumferential direction, the contact portions being configured to clamp the covered electric wire; and a moving tool, which is configured to move the plurality of contact portions that clamp the covered electric wire and the covered electric wire relative to each other in the length direction of the covered electric wire, wherein the plurality of contact portions make surface contact with an end side of the covered electric wire that is closer to the end side of the covered electric wire than the cutout, and move relatively toward the end side in the length direction of the covered electric wire, so that the covering of the covered electric wire is stripped off.

[0014] Beneficial effects of the present invention

[0015] According to one aspect of the present disclosure, a plurality of contact portions make surface contact with the end side of the covered electric wire that is closer to the end of the covered electric wire than the cutout, and relatively move toward the end side in the length direction of the covered electric wire, so that the covering of the covered electric wire is peeled off. Therefore, even when the covering is made of a soft material or when the removal length of the covering is long, the covering can be effectively removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic configuration diagram of a coating removal device according to a first embodiment of the present invention.

[0017] Figure 2 Viewed from different directions Figure 1 Schematic diagram of the coating removal device shown.

[0018] Figure 3 2 is a schematic configuration diagram of a coating removal device according to a second embodiment of the present invention.

[0019] Figure 4 It is shown Figure 3An illustration of a state in which a pair of contact portions sandwich a covered electric wire.

[0020] Figure 5 Viewed from different directions Figure 4 Schematic diagram of the coating removal device shown.

[0021] Figure 6 1 is a schematic configuration diagram of a coating removal device according to a third embodiment of the present invention.

[0022] Figure 7 It is an explanatory diagram for explaining the cross-sectional structure of a covered electric wire.

[0023] Figure 8 It is an explanatory diagram for explaining a coating removal method using a conventional coating removal apparatus.

[0024] Fig. 9 This is an explanatory diagram for explaining the problems of a coating removal method using a conventional coating removal device.

[0025] Reference Numbers List

[0026] 1. 101, 201 coating removal device

[0027] 2.102,202 contact part

[0028] 3. Mobile Tools

[0029] 10 covered wire

[0030] 11 covered DETAILED DESCRIPTION

[0031] Reference Figure 1 , Figure 2 A “coating removal device” according to a first embodiment of the present invention will be described.

[0032] For example, Figure 1 and Figure 2 The coating removal device 1 shown removes Figure 7 The cover 11 of the covered electric wire 10 is shown. The covered electric wire 10 is an electric wire having a circular cross section, and has a structure in which a conductive core wire 15 is surrounded by an insulator 14, a braid 13, a metal foil 12, and an insulating cover 11 in this order. The material of the cover 11 may be polyvinyl chloride, polyethylene, silicone, or the like, but the cover removing device 1 is designed to effectively remove the cover 11 even when the cover 11 is made of a soft material such as silicone or when the removed portion of the cover 11 is long.

[0033] The cover removal device 1 is used to peel off the cover 11 closer to the end than the cutout 17 of the covered electric wire 10, and the covered electric wire 10 has the cutout 17 formed in the circumferential direction on its outer peripheral surface. The cutout 17 extends around the covered electric wire 10. The processing method for making the cutout 17 may be the method using the above-mentioned pair of conventional cutters 16, or other methods may be used.

[0034] The cover removal device 1 includes: a holding unit (not shown) configured to hold the covered electric wire 10; four contact portions 2 that make surface contact with the outer peripheral surface of the covered electric wire 10 and sandwich the covered electric wire 10 therebetween; a moving tool 3 configured to move each contact portion 2; and a control unit (not shown).

[0035] The holding unit holds a portion of the covered electric wire 10 that is closer to the center than the cutout 17 (ie, a portion where the covering 11 is not peeled off). A known chuck or the like can be used as the holding unit.

[0036] All four contact portions 2 have the same configuration. Each contact portion 2 includes a cylindrical main body portion 21 and a rubber portion 22 provided around the entire outer peripheral surface of the main body portion 21. That is, each contact portion 2 has a contact surface made of rubber for contacting the covered electric wire 10. These contact portions 2 move toward the end side in the length direction of the covered electric wire 10 in a state of surface contact with the end side of the covered electric wire 10 closer to the end than the cutout 17, thereby peeling off the cover 11 of the covered electric wire 10.

[0037] By increasing the contact area with the coating 11, the contact portion 2 can prevent deformation of the coating 11 and can peel off the coating 11. In addition, since the contact portion 2 has a rubber contact surface for contacting the coated electric wire 10, the friction of the contact surface can be increased to prevent sliding, thereby more reliably peeling off the coating 11. In addition, although the contact portion 2 is composed of the main body portion 21 and the rubber portion 22 in this example, the entire contact portion 2 may be made of rubber.

[0038] The moving tool 3 moves the contact portion 2 in the radial direction of the covered electric wire 10 and in the length direction of the covered electric wire 10. The moving tool 3 includes: a first cylinder that moves the contact portion 2 in the radial direction of the covered electric wire 10; and a second cylinder that moves the contact portion 2 in the length direction of the covered electric wire 10 together with the first cylinder. In addition, the moving tool may be configured to have a robot arm, an electric actuator, or the like.

[0039] The control unit controls the holding unit and the moving tool 3. The control unit stores a plurality of driving programs that associate the product number of the coated electric wire 10 with the moving amount of the moving tool 3 (the amount of air to be supplied to the first cylinder and the second cylinder). Therefore, by specifying the driving program to the control unit, the coating removal device 1 is capable of performing coating removal on a plurality of types of coated electric wires having different product numbers. For example, in order to perform coating removal on a wire having a diameter less than Figure 1 The distance that each contact portion 2 moves in the radial direction of the wire (the distance that the contact portion 2 moves until the contact portion 2 contacts the surface of the coated wire) becomes longer. The reason why a plurality of coated wires of different diameters can be clamped is that the coating removal device 1 is equipped with four cylindrical contact portions 2. In addition, if the coating removal length is greater than Figure 2 If the length is larger than that shown, the distance that each contact portion 2 moves in the length direction of the wire will be longer.

[0040] Next, an example of a cover removal method using the above-mentioned cover removal device 1 is described. In this example, the cover 11 of the covered electric wire 10 is made of soft silicone resin. In this example, the cover 11 and the metal foil 12 are removed at the same time. Therefore, the cutout 17 preliminarily provided in the covered electric wire 10 reaches the layer of the metal foil 12 from the surface of the cover 11.

[0041] When a work start signal is input to the control unit, the holding unit holding the covered electric wire 10 including the cutout 17 moves, and the covered electric wire 10 is set between the four contact portions 2 spaced apart from each other. Next, the first cylinder of the moving tool 3 is driven so that the four contact portions 2 approach each other and these contact portions 2 make surface contact with the end side of the covered electric wire 10 closer to the end than the cutout 17. That is, the covered electric wire 10 is sandwiched between the four contact portions 2 ( Figure 1 and 2 Then, as the second cylinder of the moving tool 3 is driven, the four contact portions 2 sandwiching the coated electric wire 10 move toward the end side of the coated electric wire 10 in the length direction, whereby the end side of the coating 11 and the metal foil 12 closer to the end than the cutout 17 is peeled off.

[0042] As described above, in the coating removal device 1, while the contact portion 2 is in surface contact with the outer peripheral surface of the coated electric wire 10, a plurality of contact portions 2 having a length along the length direction of the coated electric wire 10 are moved to the end side in the length direction of the electric wire to peel off the coating 11. Therefore, compared with conventional techniques (e.g., Figure 8Compared with the contact portion 18 shown in the figure, the contact area of ​​the contact portion 2 with the covered electric wire 10 is larger, and a larger friction force is generated between the contact portion 2 and the covering 11, so that deformation of the covering 11 can be prevented. In addition, since the contact area is increased, the pressure is dispersed and no large force is applied to a part of the covering 11, making it difficult for the covering 11 to be deformed. Therefore, even if the material of the covering 11 is a soft material, the covering 11 can be effectively removed. In addition, even if the removal portion of the covering 11 is long, the same effect as above can be obtained and the covering can be successfully removed.

[0043] refer to Figures 3 to 5 A "coating removal device" according to a second embodiment of the present invention will be described. Figures 3 to 5 In the present invention, the same components as those of the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[0044] As in the first embodiment, Figures 3 to 5 The coating removal device 101 shown in FIG. 1 is used, for example, to remove Figure 7 1. The cover 11 of the covered electric wire 10 shown in FIG. The cover removing device 101 includes: a holding unit (not shown) configured to hold the covered electric wire 10; a pair of contact portions 102 that make surface contact with the outer peripheral surface of the covered electric wire 10 and sandwich the covered electric wire 10 therebetween; a moving tool 3 configured to move each contact portion 102; and a control unit (not shown). The holding unit and the moving tool 3 have the same configuration as the first embodiment.

[0045] Each contact portion 102 includes: a plurality of plates 122 made of metal, which are arranged at intervals along the length direction of the covered electric wire 10; and a base 121 to which the plurality of plates 122 are fixed. The plurality of plates 122 protrude from the base 121 toward the covered electric wire 10. Figure 5 As shown, each plate 122 is formed with a V-shaped groove 122 a in which the covered electric wire 10 is positioned.

[0046] like Figure 4 and 5As shown, a pair of contact portions 102 move toward each other to position the coated electric wire 10 in the groove 122a of each plate 122, and make surface contact with the end side of the coated electric wire 10 closer to the end than the cutout 17. That is, the inner surface of the groove 122a makes surface contact with the outer peripheral surface of the coated electric wire 10. In this way, in a state where the coated electric wire 10 is sandwiched between the pair of contact portions 102, the plate 122 of one contact portion 102 and the plate 122 of the other contact portion 102 are alternately arranged in the length direction of the electric wire. In addition, a space is provided between the plates 122 alternately arranged in the length direction of the electric wire. The pair of contact portions 102 move toward the end side in the length direction of the coated electric wire 10 in a state where the end side of the coated electric wire 10 closer to the end than the cutout 17 is made in surface contact, so that the coating 11 of the coated electric wire 10 is peeled off.

[0047] The contact portion 102 has a plurality of plates 122 formed as protrusions, and the covered electric wire 10 is sandwiched between the protrusions. The contact portion 102 can peel off the covering 11 by using the plurality of plates 122 to prevent deformation of the covering 11. In addition, since each plate 122 is thin, its tip bites into the covering 11 to prevent slipping. Therefore, the covering 11 can be removed more reliably.

[0048] Next, an example of a cover removal method using the above-mentioned cover removal device 101 is described. In this example, the cover 11 of the covered electric wire 10 is made of soft silicone resin. In this example, the cover 11 and the metal foil 12 are removed at the same time. Therefore, the cutout 17 preliminarily provided in the covered electric wire 10 reaches the layer of the metal foil 12 from the surface of the cover 11.

[0049] When the control unit inputs the operation start signal, the holding unit holding the covered electric wire 10 including the cutout 17 moves, and sets the covered electric wire 10 between a pair of contact portions 102 spaced apart from each other (such as Figure 3 Next, the first cylinder of the moving tool 3 is driven so that the pair of contact portions 102 approach each other and these contact portions 102 make surface contact with the end side of the covered electric wire 10 closer to the end than the cutout 17. That is, the covered electric wire 10 is sandwiched between the pair of contact portions 102 ( Figure 4 and 5 Then, as the second cylinder of the moving tool 3 is driven, the pair of contact portions 102 sandwiching the coated electric wire 10 moves toward the end side of the coated electric wire 10 in the longitudinal direction, thereby peeling off the ends of the coating 11 and the metal foil 12 closer to the ends than the cutout 17.

[0050] Like the cover removing device 1 of the first embodiment, the above-described cover removing device 101 can effectively remove the cover 11 even if the material of the cover 11 is a soft material or even if the removal length of the cover 11 is long.

[0051] refer to Figure 6 A coating removal device according to a third embodiment of the present invention will be described. Figure 6 In the present invention, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[0052] Figure 6 The coating removal device 201 shown in FIG. 1 has four contact portions 202 instead of the four contact portions 2 of the coating removal device 1 of the first embodiment, and otherwise has the same configuration as the coating removal device 1. As in the first embodiment, the coating removal device 201 is used, for example, to peel off Figure 7 The covered electric wire 10 is shown with a cover 11 .

[0053] Each contact portion 202 is made of metal and has a cylindrical shape. The contact surface of the contact portion 202 with the covered electric wire 10, that is, the outer peripheral surface of the contact portion 202, is formed with a concave-convex portion to increase friction. In this example, the concave-convex portion is formed by knurling. In addition, the concave-convex portion can be formed on the outer peripheral surface of the contact portion 202 by sandblasting or shot blasting.

[0054] The contact portion 202 can prevent deformation of the cover 11 by increasing the contact area with the cover 11, and can peel off the cover 11. In addition, since the contact portion 202 has the above-mentioned concavoconvex portion formed on the contact surface with the covered electric wire 10, the friction force on the contact surface can be increased and slipping can be prevented, so that the cover 11 can be peeled off more reliably.

[0055] The cover removal method of the cover removal device 201 is the same as the cover removal method of the cover removal device 1 of the first embodiment, and thus the description thereof is omitted.

[0056] Like the cover removing device 1 of the first embodiment, the above-described cover removing device 201 can effectively remove the cover 11 even when the material of the cover 11 is a soft material or when the removal length of the cover 11 is long.

[0057] Although the example in which the moving tool moves the contact portion relative to the fixed covered electric wire has been described in the above-mentioned embodiment, the moving tool may move the covered electric wire relative to the fixed contact portion in the present invention.

[0058] In the embodiment described above, an example of removing the coating 11 and the metal foil 12 of the coated electric wire 10 as a shielded electric wire having a five-layer structure has been described, but the present invention is not limited thereto. The coating removal device of the present invention can also be applied to, for example, a coated electric wire having a two-layer structure in which a core wire is surrounded by a coating. Moreover, the number of layers removed from the outside of the coated electric wire is not particularly limited.

[0059] Note that the above-described embodiment only illustrates a typical form of the present invention, and the present invention is not limited to the embodiment. That is, various modifications can be made without departing from the gist of the present invention. It should be understood that as long as they still have the structure of the present invention, these modifications are all included in the scope of the present invention.

Claims

1. A coating removal device, comprising: a plurality of contact portions configured to make surface contact with an outer peripheral surface of a covered electric wire having a circular cross section, the covered electric wire having a cutout formed in a circumferential direction on the outer peripheral surface, the contact portions configured to sandwich the covered electric wire; as well as a moving tool configured to move the plurality of contact portions sandwiching the covered electric wire and the covered electric wire relative to each other in the longitudinal direction of the covered electric wire, The plurality of contact portions make surface contact with an end portion of the covered electric wire closer to the end portion of the covered electric wire than the cutout, and relatively move toward the end portion in the longitudinal direction of the covered electric wire to peel off the covering of the covered electric wire.

2. The coating removal device according to claim 1, wherein: A contact surface of the contact portion that comes into contact with the covered electric wire is made of rubber.

3. The coating removal device according to claim 1, wherein: A concavo-convex portion for increasing frictional force is formed on a contact surface of the contact portion that contacts the covered electric wire.

4. The coating removal device according to claim 1, wherein: The contact portion includes a plurality of plates arranged at intervals along a length direction of the covered electric wire, and each of the plurality of plates makes surface contact with an outer peripheral surface of the covered electric wire.

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