Wire Sheathing Stripping Device

Abstract

To provide an electric wire covering stripping device capable of stripping the covering of an electric wire without damaging the core material of the electric wire. [Solution] The electric wire stripping device 1 includes a rotor 2 having a hole at its center through which the electric wire EW is inserted, and a plurality of blades 3 provided on the rotor 2 so as to be movable forward and backward toward the rotation axis of the rotor 2. The electric wire stripping device 1 also includes a plurality of abutting members 83 that abut at a position on the tip side of a position at which the insulation of the electric wire EW inserted into the rotor 2 is cut. The plurality of abutting members 83 are configured to abut against the insulation of the electric wire from before the plurality of blades 3 abut against the insulation of the electric wire EW until the insulation of the electric wire EW is cut.

Description

[Technical field]

[0001] The present invention relates to an electric wire stripping device for stripping the coating of an electric wire. [Background technology]

[0002] Conventionally, there has been known an electric wire sheath stripping device that strips the sheath of an electric wire (see, for example, Patent Document 1). The sheathed cable stripping device (electric wire sheath stripping device) described in Patent Document 1 includes a rotating body having a hole at its center through which the sheathed cable (electric wire) is inserted, a plurality of blades provided on the rotating body so as to be slidable toward the rotation axis of the rotating body, a cable holding part that clamps the base end of the electric wire inserted into the rotating body, and a stopper that sets the position at which the tip end of the electric wire inserted into the rotating body comes into contact with the stopper to cut the sheath of the electric wire. When stripping the insulation of an electric wire with this cable stripping device, a user inserts the electric wire into the hole of the rotor, abuts the tip of the electric wire against the stopper, and then clamps the electric wire in the cable holding part. The cable stripping device then rotates the rotor and slides the multiple blades toward the rotation axis of the rotor to cut the insulation of the electric wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-124051 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the cable stripping device described in Patent Document 1 rotates the electric wire using a rotor while inserting multiple blades toward the axis of the rotor. This creates the problem that the central axis of the electric wire may become misaligned with the axis of the rotor due to the tendency of the electric wire to bend or due to the twisting force applied to the electric wire when the insulation of the electric wire is stripped off, which may result in damage to the core material of the electric wire.

[0005] An object of the present invention is to provide an electric wire stripping device capable of stripping the coating of an electric wire without damaging the core material of the electric wire. [Means for solving the problem]

[0006] The wire insulation stripping device of the present invention includes a rotor having a hole at its center for inserting an electric wire therethrough, and a plurality of blades provided on the rotor so as to be capable of moving forward and backward toward the axis of the rotor. The rotor is rotated and the plurality of blades are advanced toward the axis of the rotor to cut the insulation of the electric wire. The wire insulation stripping device includes a plurality of abutting members that abut against the rotor at a position on the tip side of the position at which the insulation of the electric wire inserted into the rotor is cut. a plurality of holding members that are provided on the rotating body so as to be movable toward and away from the rotation axis of the rotating body and that hold the plurality of blades, respectively; Equipped with the plurality of holding members hold the plurality of contact members respectively so as to be freely movable toward and away from the rotation shaft of the rotating body; The plurality of abutment members include the blades are held by the plurality of holding members so as to protrude slightly toward the rotation axis of the rotor beyond the plurality of blades, The blades are configured to abut against the wire insulation from before the blades abut against the wire insulation until the blades cut the wire insulation. The wire sheath stripping device includes an adjustment means for adjusting the pressing force of the contact members against the sheath of the wire by adjusting the positions of the contact members. It is characterized by the above.

[0007] According to this configuration, the multiple contact members are configured to contact the wire coating from before the multiple blades contact the wire coating until the wire coating is cut, so that when stripping the wire coating, the wire coating stripping device can cut the wire coating while pressing the multiple contact members at a position on the tip side of the wire coating that is further forward than the position where the wire coating is cut. Therefore, the wire coating stripping device can strip the wire coating without damaging the core material of the wire.

[0009] AlsoSince the multiple blades and the multiple abutment members are held by the multiple holding members, both the multiple blades and the multiple abutment members can be advanced toward the rotation shaft of the rotor by advancing the multiple holding members toward the rotation shaft of the rotor. Also, since the multiple abutment members are held by the multiple holding members so as to protrude slightly toward the rotation shaft of the rotor beyond the multiple blades, the multiple holding members can be advanced toward the rotation shaft of the rotor to abut against the insulation of the electric wire before the multiple blades. Thus, the electric wire insulation stripping device can be configured with a simple configuration so that the multiple abutment members abut against the insulation of the electric wire from before the multiple blades abut against the insulation of the electric wire until the insulation of the electric wire is cut.

[0011] moreover Since the wire insulation stripping device is equipped with an adjustment means for adjusting the pressing force of the multiple abutment members against the insulation of the wire by adjusting the positions of the multiple abutment members, by advancing the multiple holding members toward the rotation axis of the rotating body, the pressing force of the multiple abutment members against the insulation of the wire can be adjusted even if both the multiple blades and the multiple abutment members are configured to advance toward the rotation axis of the rotating body, and thus the insulation of the wire can be stripped without hindering the rotation of the rotating body.

[0012] In the present invention, it is preferable that the adjustment means adjusts the pressing forces of the plurality of contact members to be the same.

[0013] According to this configuration, the adjustment means adjusts the pressing forces of the multiple abutment members to be the same, thereby suppressing misalignment between the central axis of the electric wire and the rotation axis of the rotating body, and thus enabling the coating of the electric wire to be stripped without damaging the core material of the electric wire.

[0014] In the present invention, the adjustment means is preferably a biasing member that biases each of the plurality of contact members toward the rotation axis of the rotating body.

[0015] With this configuration, the adjustment means is a biasing member that biases each of the multiple abutment members toward the rotation axis of the rotating body, so that the pressing force of the multiple abutment members against the insulation of the electric wire can be adjusted with a simple configuration, and thus the insulation of the electric wire can be stripped without hindering the rotation of the rotating body. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a front view showing a main part of a wire stripping device according to an embodiment of the present invention; [Diagram 2] A side view showing the main part of the wire stripping device. [Diagram 3] A side view showing the main part of the wire stripping device. [Figure 4] FIG. 1 is a front view showing a base member and an arm; [Diagram 5] A front view showing a holding member for holding a blade. [Figure 6] FIG. 13 is a top view showing a holding member for holding a blade. [Figure 7] A side view showing a holding member for holding a blade. [Figure 8] FIG. 3 is a cross-sectional view showing a front portion of the holding member; [Figure 9] FIG. 2 is a top view showing a holding member and various members arranged in the vicinity of the holding member; [Figure 10] A diagram showing the state where cutting of the wire insulation has started. [Figure 11] FIG. 13 is a diagram showing a state in which cutting of the wire insulation is continued after the contact member comes into contact with the wire insulation; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view showing a main part of a wire stripping device according to an embodiment of the present invention. Figs. 2 and 3 are side views showing the main part of the wire stripping device. In Figs. 1 to 3, the upward vertical direction is defined as the +Z axis direction, and two axes perpendicular to the Z axis are defined as the X and Y axes. The same applies to the following drawings.

[0018] As shown in Figures 1 to 3, the wire sheath stripping device 1 includes a rotating body 2 having a hole at its center through which the electric wire EW is inserted, and four blades 3 provided on the rotating body 2 so as to be freely movable toward and away from the rotation axis of the rotating body 2. Hereinafter, the blade 3 located on the +Z axis direction side may be referred to as blade 31, the blade 3 located on the +Y axis direction side as blade 32, the blade 3 located on the -Z axis direction side as blade 33, and the blade 3 located on the -Y axis direction side as blade 34. Fig. 2 is a diagram showing a cross section of the electric wire insulation stripping apparatus 1 taken along line II in Fig. 1, and Fig. 3 is a diagram showing a cross section of the electric wire insulation stripping apparatus 1 taken along line II-II in Fig. 1.

[0019] The wire sheath stripping device 1 has a configuration substantially similar to that of the sheathed cable stripping device described in Patent Document 1, and includes, for example, a wire holding portion (not shown) that clamps the base end (end on the +X axis direction side) of the wire EW inserted into the rotating body 2, and a stopper (not shown) that abuts against the tip end (end on the -X axis direction side) of the wire EW inserted into the rotating body 2 to set the position for cutting the sheath of the wire EW.

[0020] When stripping the insulation of the electric wire EW with this electric wire stripping device 1, the user inserts the electric wire EW into the hole in the rotating body 2, brings the tip of the electric wire EW into contact with the stopper, and then clamps the electric wire EW in the electric wire holding part. Then, the electric wire stripping device 1 rotates the rotating body 2 and advances the four blades 3 toward the rotation axis of the rotating body 2 to cut the insulation of the electric wire EW.

[0021] As shown in Figures 2 and 3, the rotating body 2 includes a cylindrical inner tube 4 provided on the -X axis direction side, and a cylindrical outer tube 5 having a flange portion 51 formed on the +X axis direction side and housing the inner tube 4 therein. Here, the inner cylinder 4 and the outer cylinder 5 are rotated around the X-axis by being driven by a motor (not shown). The outer cylinder 5 is provided so as to be slidable along the X-axis direction by being driven by an actuator (not shown).

[0022] The rotor 2 is fixed to the inner cylinder 4 and includes a rectangular parallelepiped base member 6 having a hole in the center through which the electric wire EW is inserted. The base member 6 supports four arms 7, which are provided at positions corresponding to the four blades 3, by pins 61 so as to be freely rotatable.

[0023] FIG. 4 is a front view showing the base member and the arm. As shown in Figures 2 to 4, each arm 7 is formed in an L-shape having a first arm portion 71 extending radially outward from the rotating body 2, and a second arm portion 72 bending from the tip of the first arm portion 71 and extending toward the +X-axis direction.

[0024] As described above, the base end of the first arm portion 71 is pivotally supported by the pin 61 of the base member 6. The second arm portion 72 includes a rectangular plate 73 (see FIGS. 2 and 3) fixed to its base end (the tip end of the first arm portion 71). The plate 73 has a disk portion 731 attached to the -X axis direction side, and the disk portion 731 abuts against the flange portion 51 of the outer cylinder 5. Second arm 72 has jaw 721 formed at its tip, and jaw 721 holds cylindrical shaft 74. Shaft 74 is fixed to one end in the longitudinal direction of rectangular plate 75. The other end of plate 75 is fixed to holding member 8 which holds blade 3 described above.

[0025] Fig. 5 is a front view showing a holding member that holds a blade. Fig. 6 is a top view showing a holding member that holds a blade. Fig. 7 is a side view showing a holding member that holds a blade. Specifically, Figs. 5 to 7 are views showing a holding member 8 that holds a blade 31. As shown in Figures 5 to 7, the holding member 8 is formed in a rectangular plate shape and is an L-shaped cross-section member that includes a front portion 81 having two screw holes 811 for attaching the blades 3 to a radially inner portion of the rotating body 2, and a rectangular plate-like side portion 82 that bends from the front portion 81 and extends toward the -X axis direction side.

[0026] Here, blade 3 is a plate-shaped blade with one surface being an inclined surface and the other surface being a flat surface, as shown in Figures 2 and 3. Blade 32 (blade 34) attached at a position intersecting blade 31 (blade 33) is attached so that the other surface faces, as shown in Figure 2. Blade 33 attached at a position opposite blade 31 is attached so that the other surface is flush, as shown in Figure 3.

[0027] Fig. 8 is a cross-sectional view showing the front part of the holding member 8. Specifically, Fig. 8 is a cross-sectional view of the front part 81 of the holding member 8 cut along the XZ plane. The front surface 81 of the holding member 8 has a through hole 812 formed so as to penetrate the rotating body 2 in the radial direction, as shown in FIGS.

[0028] As shown in FIGS. 2, 3, and 8, the holding member 8 includes a cylindrical contact member 83 that is inserted into the through hole 812 and comes into contact with the coating of the electric wire EW. As shown in Fig. 8, the abutment member 83 is attached to the holding member 8 via two bosses 831 having flanges inserted into both ends of the through hole 812. The abutment member 83 has flanges on both ends, and is prevented from falling out of the through hole 812 by the flanges of the bosses 831 and the flanges of the abutment member 83. The abutment member 83 includes a spring member 832 attached between the flange that abuts against the coating of the electric wire EW and the flange of the boss, and is biased toward the rotation shaft of the rotor 2 by the spring member 832. The abutment member 83 is set to a length that slightly protrudes toward the rotation shaft of the rotor 2 beyond the blade 3 when biased by the spring member 832 (see Figs. 1 to 3).

[0029] FIG. 9 is a top view showing the holding member and various members arranged in the vicinity of the holding member. The side surface portion 82 of the holding member 8 has a groove portion 821 formed along the radial direction of the rotor 2, as shown in FIGS. As shown in Figures 2, 3, and 9, the holding member 8 is fixed to the groove portion 821 and is provided with a rectangular column-shaped guide member 84 that guides the blade 3 when the blade 3 is advanced or retreated toward the rotation axis of the rotating body 2.

[0030] Here, the rotating body 2 is provided with a guide plate 91 that guides the guide member 84 along the radial direction of the rotating body 2, and this guide plate 91 is fixed to the base member 6 via a plate-shaped support member 9 (see Figures 2 and 3). Furthermore, the rotating body 2 includes a damper 10 attached so as to straddle the second arm portion 72 and the support member 9, as shown in FIG. 2 and FIG.

[0031] When stripping the coating of the electric wire EW using this electric wire coating stripping device 1, as described above, the user inserts the electric wire EW into the hole in the rotating body 2, abuts the tip of the electric wire EW against the stopper, and then clamps the electric wire EW in the wire holding portion (see Figure 2). The stopper is a cylindrical member stored inside the inner tube 4, and the distance from the multiple blades 3 can be adjusted by moving it back and forth along the X-axis direction. Therefore, by adjusting the position of this stopper, the position for cutting the insulation of the electric wire EW inserted into the rotating body 2 can be set.

[0032] FIG. 10 is a diagram showing a state where cutting of the covering of the electric wire has started. As shown in FIG. 10, the electric wire stripping device 1 cuts the coating of the electric wire EW by rotating the inner tube 4 and the outer tube 5 (see arrow A in the figure) and advancing the four blades 3 toward the rotation axis of the rotating body 2. Specifically, the wire sheath stripping device 1 moves the outer tube 5 in the +X-axis direction (see arrow B in the figure), thereby causing the four blades 3 to advance toward the rotation axis of the rotor 2. The flange portion 51 of the outer tube 5 moves in the +X-axis direction, thereby pushing out the disk portion 731 of the plate 73, and rotates the arm 7 about the pin 61 (see arrow C in the figure). The arm 7 rotates about the pin 61, thereby causing the plate 75 and the holding member 8 to advance toward the rotation axis of the rotor 2 via the shaft 74. Then, the four blades 3 advance toward the rotation axis of the rotor 2 together with the holding member 8, and cut the sheath of the electric wire EW. At this time, the holding member 8 can advance toward the rotation axis of the rotor 2 by being guided by the guide plate 91 of the support member 9 via the guide member 84.

[0033] Here, the abutment member 83 held by the holding member 8 advances toward the rotation shaft of the rotor 2 together with the four blades 3. The abutment member 83 is set to a length that causes it to slightly protrude toward the rotation shaft of the rotor 2 beyond the multiple blades 3 when biased by the spring member 832, and therefore comes into contact with the coating of the electric wire EW before the multiple blades 3 do (see FIG. 10).

[0034] FIG. 11 is a diagram showing a state in which cutting of the covering of the electric wire is continued after the contact member has come into contact with the covering of the electric wire. 11, after the contact member 83 comes into contact with the covering of the electric wire EW, the electric wire covering stripping device 1 moves the outer tube 5 in the +X-axis direction (see arrow B in the figure) to advance the four blades 3 toward the rotation axis of the rotor 2. At this time, the contact member 83 retreats toward the inside of the holding member 8 against the biasing force of the spring member 832, and the multiple blades 3 cut the covering of the electric wire EW.

[0035] Thus, in this embodiment, the multiple contact members 83 are in contact with the position on the tip side (-X axis direction side) of the position where the coating of the electric wire EW inserted into the rotating body 2 is cut. The multiple contact members 83 are configured to be in contact with the coating of the electric wire EW from before the multiple blades 3 come into contact with the coating of the electric wire EW until the coating of the electric wire EW is cut.

[0036] In this embodiment, the multiple holding members 8 are provided on the rotating body 2 so as to be freely movable toward and away from the rotation axis of the rotating body 2, and hold the multiple blades 3, respectively. In this embodiment, the multiple holding members 8 hold the multiple contact members 83, respectively, so that they can freely advance and retreat toward the rotation shaft of the rotor 2. The multiple contact members 83 are held by the multiple holding members 8, respectively, so that they slightly protrude toward the rotation shaft of the rotor 2 beyond the multiple blades 3.

[0037] Furthermore, the electric wire sheath stripping device 1 includes a spring member 832 as a biasing member that biases each of the plurality of contact members 83 toward the rotation shaft of the rotating body 2. The spring member 832 functions as an adjustment means that adjusts the positions of the plurality of contact members 83 to make the pressing forces of the plurality of contact members 83 against the sheath of the electric wire EW uniform. In this embodiment, the adjustment means adjusts the pressing forces of the multiple abutment members 83 against the coating of the electric wire EW to be uniform, but the adjustment does not have to be made uniform, and the pressing forces of the multiple abutment members 83 against the coating of the electric wire EW may be adjusted individually.

[0038] According to this embodiment, the following actions and effects can be achieved. (1) The multiple contact members 83 are configured to contact the covering of the electric wire EW from before the multiple blades 3 contact the covering of the electric wire EW until the covering of the electric wire EW is cut, so that when stripping the covering of the electric wire EW, the electric wire stripping device 1 can cut the covering of the electric wire EW while pressing a position on the tip side of the position where the covering of the electric wire EW is cut with the multiple contact members 83. Therefore, the electric wire stripping device 1 can strip the covering of the electric wire EW without damaging the core material of the electric wire EW.

[0039] (2) Since the multiple blades 3 and the multiple abutting members 83 are held by the multiple holding members 8, both the multiple blades 3 and the multiple abutting members 83 can be advanced toward the rotation shaft of the rotor 2 by advancing the multiple holding members 8 toward the rotation shaft of the rotor 2. In addition, since the multiple abutting members 83 are held by the multiple holding members 8 so as to protrude slightly toward the rotation shaft of the rotor 2 more than the multiple blades 3, the multiple abutting members 83 can abut against the insulation of the electric wire EW before the multiple blades 3 advance toward the rotation shaft of the rotor 2. Therefore, the electric wire insulation stripping device 1 can be configured to have the multiple abutting members 83 abut against the insulation of the electric wire EW from before the multiple blades 3 abut against the insulation of the electric wire EW until the insulation of the electric wire EW is cut, with a simple configuration.

[0040] (3) The wire coating stripping device 1 is equipped with an adjustment means for adjusting the pressing force of the multiple abutment members 83 against the coating of the electric wire EW by adjusting the positions of the multiple abutment members 83. Therefore, even if the multiple holding members 8 are configured to advance both the multiple blades 3 and the multiple abutment members 83 toward the rotation shaft of the rotating body 2, the pressing force of the multiple abutment members 83 against the coating of the electric wire EW can be adjusted by advancing the multiple holding members 8 toward the rotation shaft of the rotating body 2, and thus the coating of the electric wire EW can be stripped without impeding the rotation of the rotating body 2. (4) The adjustment means adjusts the pressing forces of the multiple abutment members 83 to be uniform, thereby suppressing misalignment of the central axis of the electric wire EW and the rotation axis of the rotating body 2, and thus enables the coating of the electric wire EW to be stripped without damaging the core material of the electric wire EW. (5) The adjustment means is the spring member 832 that biases each of the multiple abutment members 83 toward the rotation axis of the rotating body 2. Therefore, the pressing force of the multiple abutment members 83 against the insulation of the electric wire EW can be adjusted with a simple configuration. As a result, the insulation of the electric wire EW can be stripped without hindering the rotation of the rotating body 2.

[0041] [Modifications of the embodiment] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of the present invention that can achieve the object of the present invention are included in the present invention. For example, in the above embodiment, the multiple abutment members 83 are held by the multiple holding members 8 so as to protrude toward the rotation axis of the rotor 2 more than the multiple blades 3, so that the multiple blades 3 abut against the covering of the electric wire EW from before they come into contact with the covering of the electric wire EW until they cut the covering of the electric wire EW, but other configurations may be adopted. For example, the positions of the multiple abutment members may be actively adjusted so that the multiple blades 3 abut against the covering of the electric wire EW from before they come into contact with the covering of the electric wire EW until they cut the covering of the electric wire EW.

[0042] In the above embodiment, the wire stripping device 1 is configured to advance both the multiple blades 3 and the multiple abutting members 83 toward the electric wire EW by advancing the multiple holding members 8 toward the rotation shaft of the rotor 2, but the multiple blades 3 and the multiple abutting members 83 may be configured to advance individually toward the rotation shaft of the rotor 2. For example, the multiple abutting members may be provided at a position rotated 45 degrees around the rotation shaft of the rotor with respect to the multiple blades, without being held by the multiple holding members.

[0043] In the above embodiment, the wire stripping device 1 employs the spring member 832 as an adjustment means for adjusting the pressing force of the multiple abutting members 83 against the coating of the electric wire EW by adjusting the positions of the multiple abutting members 83. In contrast, the adjustment means may be configured to adjust the pressing force of the multiple abutting members against the coating of the electric wire EW, for example, by actively adjusting the positions of the multiple abutting members. Also, the wire stripping device 1 may not be provided with the adjustment means, and the multiple abutting members may advance toward the rotation axis of the rotor together with the multiple blades to increase the pressing force. [Industrial Applicability]

[0044] INDUSTRIAL APPLICABILITY As described above, the present invention can be widely applied to wire stripping devices that strip the coating of electric wires. [Explanation of symbols]

[0045] 1 Wire coating stripping device 2 Rotating body 3 Blades 4 Inner cylinder 5 Outer cylinder 6 Base material 7 Arm 8 Retaining member 9 Supporting member 10 Damper 51 Flange 61 pin 73 Plate 74 Shaft body 75 Plate 83 Contact member 84 Guide member 91 Guide plate 832 Spring members (biasing members, adjustment means) EW Electric Wire

Claims

1. An electric wire stripping device comprising: a rotor having a hole at its center through which an electric wire is inserted; and a plurality of blades provided on the rotor so as to be movable toward and away from a rotation axis of the rotor, the device rotating the rotor and causing the plurality of blades to advance toward the rotation axis of the rotor, thereby cutting the insulation of the electric wire, a plurality of contact members that come into contact with the rotating body at positions on the tip side of a position where the insulation of the electric wire inserted in the rotating body is cut; a plurality of holding members that are provided on the rotating body so as to be movable toward and away from a rotation axis of the rotating body and that hold the plurality of blades, the plurality of holding members hold the plurality of contact members respectively so as to be freely advanced and retreated toward the rotation axis of the rotating body; the plurality of contact members are held by the plurality of holding members so as to protrude slightly toward the rotation axis of the rotor relative to the plurality of blades, and are configured to contact the insulation of the electric wire before the plurality of blades contact the insulation of the electric wire until the insulation of the electric wire is cut, The wire coating stripping device includes: an adjustment means for adjusting the pressing force of the plurality of contact members against the insulation of the electric wire by adjusting the positions of the plurality of contact members;

2. The wire stripping device according to claim 1, The wire stripping device according to claim 1, wherein the adjusting means adjusts the pressing forces of the plurality of contact members so as to be uniform.

3. 3. The wire stripping apparatus according to claim 2, The wire stripping device according to claim 1, wherein the adjustment means is a biasing member that biases each of the plurality of contact members toward a rotation shaft of the rotating body.

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