JP2008005586A - Braid cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braid cutter which can cut the braid of a cable without making a cut on the insulator of the cable by a cutting edge. <P>SOLUTION: One end of the insulator 3b of the cable 3 is inserted into the tube of the tip 9d of an insulator protector 9 so that the periphery of the tip 9d of the insulator protector 9 is covered with a braid 3c of the cable 3, and the edge tip of a rotating edge is pushed against the braid 3c covering the tip 9d of the insulator protector 9 so that it is orthogonal to the axis of the tube of the insulator protector 9, and the cable 3 is rotated about the axis, whereby the braid 3c is cut in its circumferential direction by the rotating edge, that is, the braid 3c of the cable 3 is cut by the rotating edge, under the condition that the insulator 3b of the cable 3 be protected with the insulator protector 9, and thereby the braid 3c can be cut, without making incisions to the insulator 3b, by the rotating edge (that is, the cutting edge). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a braid cutting device for cutting the braid of an electric wire (braided shielded electric wire) in which at least an insulator, a braid, and a jacket are sequentially formed on the outer periphery of a central conductor.

  As shown in FIG. 7, in the conventional braid cutting apparatus, the contact member 102 applied to the outer peripheral surface of the electric wire 101 from both sides and the cutting edge 103a thereof from the outer peripheral surface of the electric wire 101 to the axial center side of the electric wire 101 (that is, the outer side). The cutting edge 103 disposed on the abutting member 102 and the abutting member 102 are in contact with the outer peripheral surface of the electric wire 101 so as to protrude (the amount obtained by adding the thickness of the workpiece 104 and the thickness of the braid 105). And a rotation mechanism (not shown) that cuts the braid 105 along the circumferential direction by the cutting blade 103.

  That is, in this braided cutting device, the cutting edge 103a of the cutting blade 103 is projected by a predetermined amount toward the axial center side of the electric wire 101 with reference to the outer peripheral surface of the electric wire 101.

  In addition, the following technique is known as a prior art regarding the braid cutting apparatus.

JP 2001-45623 A JP 2001-327027 A JP 2002-101515 A

  In general, in the braided shielded electric wire 101, the thickness of the jacket 104 is not uniform, and the jacket 104, the braid 105, and the insulator 106 may be eccentric from the axis of the wire 101. Therefore, as in the above-described conventional braid cutting apparatus, when the cutting blade 103 protrudes a predetermined amount from the outer peripheral surface of the electric wire 101 to the axial center side of the electric wire 101, the abutting member 102 is rotated to rotate the cutting blade 103. Therefore, when the braid 105 is cut along the circumferential direction, the braid 105 is left uncut, and on the opposite side, the insulator 106 is cut by the cutting blade 103.

  In general, in the braided shielded electric wire 101, the insulator 106 and the braid 105 are in close contact with each other. Therefore, in the above-described conventional braided shielded electric wire, if the cutting blade 103 does not cut to the insulator 106, the braid 105 cannot be completely cut, that is, if the uncut portion of the braid 105 is to be eliminated, the insulator inevitably becomes an insulator. There is a drawback that a cut by the cutting blade 103 is made in 106.

  Then, the subject of this invention is providing the braid cutting device which can cut | disconnect the braid of an electric wire, preventing the cut | judging with respect to the insulator of an electric wire with a cutting blade.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a braid cutting device for cutting the braid of an electric wire in which at least an insulator, a braid, and a jacket are sequentially formed on the outer periphery of a central conductor, An electric wire holding part that holds an electric wire whose braid is exposed by peeling off the outer cover of one end part, and is supported in a rotatable manner around the axis of the electric wire, and the electric wire holding part A braid that is concentrically supported on an extension line of the axis of the electric wire held by the wire and exposed at one end of the electric wire held by the electric wire holding portion is covered on the outer periphery of the tip. In the same manner, an insulator protection portion into which one end portion of the insulator of the electric wire held by the electric wire holding portion is inserted into the cylinder at the tip portion, and the outer circumference of the insulator holding portion is covered A braid that is mounted on the insulator protection part so as to hold the braid Even a member and a rotation that is rotatably supported around its central axis and pressed against the braid covered by the insulator protection portion so that the cutting edge is orthogonal to the cylinder axis direction of the insulator protection portion The blade, the electric wire holding portion and the insulator protection portion are rotated in conjunction with each other, and the electric wire held by the electric wire holding portion is rotated about its axis, whereby the braid is formed by the rotary blade. And a rotating mechanism for cutting along the circumferential direction.

  According to a second aspect of the present invention, a groove into which the cutting edge of the rotary blade enters is annularly provided on the outer peripheral surface of the tip portion of the insulator protection portion.

  According to a third aspect of the present invention, the electric wire holding portion is formed in a cylindrical shape, and a slit-like cut for diameter reduction is formed in the cylindrical peripheral wall of one end portion from the opening side of the one end along the cylindrical axis direction. A plurality of wire holding part main bodies through which the electric wires are inserted and detachably attached to the outer periphery of the one end part of the electric wire holding part body, and tightening the one end part from the outer peripheral side in the attached state And a cylindrical fastening member that holds the electric wire inserted into the electric wire holding portion main body by reducing the diameter.

  According to a fourth aspect of the present invention, the braided pressing member is disposed on a cylindrical braided pressing member main body that is detachably mounted on the outer periphery of the insulator protection portion, and an inner peripheral surface of the braided pressing member main body. A ring-shaped elastic member provided around the outer periphery of the braid covered by the insulator protection portion in a state where the main body of the braid holding member is mounted on the outer periphery of the insulator protection portion. It is.

  According to a fifth aspect of the present invention, a plurality of slit-shaped cuts for reducing the diameter are provided on the cylindrical peripheral wall of the distal end portion of the insulator holding portion from the distal end opening side along the cylindrical axis direction, The braided holding member mounted on the outer periphery of the tip end portion of the insulator holding portion holds the insulator inserted into the tip end portion by being tightened from the outer peripheral side and reduced in diameter. Is.

  According to a sixth aspect of the present invention, the braid holding member is hung on the outer periphery of the insulator protection part via the pulley supported rotatably and the braid covered on the insulator protection part. An annular braid holding belt that is hung on a pulley; and tension applying means that applies tension to the braid holding belt and presses the braid covered on the insulator protection portion by the braid holding belt. The rotating mechanism circulates the braid holding belt in accordance with the rotation of the braid placed on the insulator holding portion by rotating the pulley in conjunction with the rotation of the electric wire holding portion and the insulator protecting portion. It is intended to rotate.

  According to the first aspect of the present invention, one end portion of the insulator of the electric wire is placed in the cylinder at the distal end portion of the insulator protection portion so that the outer periphery of the tip portion of the insulator protection portion is covered with the braid of the electric wire. Is inserted and the blade tip of the rotary blade is pressed against the braid covered on the tip of the insulator protection part so as to be orthogonal to the cylinder axis direction of the insulator protection part, and the electric wire is rotated around its axis. The braid is cut along the circumferential direction by the rotary blade, that is, the braid of the electric wire is cut by the rotary blade in a state where the insulator of the electric wire is protected by the insulator protection part. Therefore, the braid can be cut by the rotary blade without making a cut on the insulator.

  Further, since the braid holding member is mounted on the insulator protection portion so as to press the braid covered on the outer periphery of the insulator protection portion, the braid holding member can prevent the braiding of the electric wire from being scattered.

  Moreover, since an electric wire is rotated by hold | maintaining an electric wire with an electric wire holding | maintenance part and rotating the electric wire holding | maintenance part with a rotation mechanism, an electric wire can be smoothly rotated to the surroundings of the axis | shaft. At that time, the insulator protection part is rotatably supported, and the insulator protection part is rotated in conjunction with the rotation of the electric wire holding part by the rotation mechanism, so that the braid covered on the insulator protection part is disturbed. Can be prevented.

  According to invention of Claim 2, since the groove | channel into which the blade edge | tip of a rotary blade enters in the outer peripheral surface of the front-end | tip part of an insulator protection part cyclically | annularly, the blade edge of a rotary blade is said groove | channel via a braid. By entering inside, it is possible to cut completely without leaving the braid uncut.

  According to the third aspect of the present invention, the electric wire holding portion is formed in a cylindrical shape, and a slit-shaped cut for reducing the diameter from the opening side of the one end to the cylindrical peripheral wall of the one end portion along the cylindrical axis direction. Are provided, and the electric wire holding part main body through which the electric wire is inserted, and the outer end of the one end part of the electric wire holding part main body are detachably attached. By tightening and reducing the diameter, a cylindrical fastening member for holding the electric wire inserted into the electric wire holding part main body is provided, so that the electric wire can be firmly held.

  According to the invention described in claim 4, the braided pressing member is disposed on the cylindrical braided pressing member main body that is detachably mounted on the outer periphery of the insulator protection portion, and the inner peripheral surface of the braided pressing member main body. Since the braided pressing member main body is mounted on the outer periphery of the insulator protection part, the ring-shaped elastic member is provided around the outer periphery of the braid covered by the insulator protection part. By simply mounting the braid holding member main body on the outer periphery of the insulator protection part via the braid, the braid can be pressed so as not to be separated by the ring-shaped elastic member disposed on the braid holding member main body.

  According to the fifth aspect of the present invention, a plurality of slit-shaped notches for reducing the diameter are provided on the cylindrical peripheral wall of the distal end portion of the insulator holding portion from the distal end opening side along the cylindrical axis direction. Since the distal end portion is tightened from the outer peripheral side and reduced in diameter by the braided pressing member attached to the outer periphery of the distal end portion of the body holding portion, the insulator inserted into the distal end portion is held. In addition, it is possible to prevent the insulator of the electric wire inserted into the distal end portion of the insulator holding portion from being detached from the distal end portion of the insulator holding portion.

  According to the invention described in claim 6, the braid holding member is hung on the outer periphery of the insulator protection part via the pulley supported rotatably and the braid covered on the insulator protection part, and on the pulley. An annular braid holding belt to be hung, and tension applying means for applying tension to the braid holding belt and pressing the braid covered on the insulator protection portion by the braid holding belt. By rotating the pulley in conjunction with the rotation of the wire holding part and the insulator protection part by the mechanism, the braid holding belt is circulated and rotated in accordance with the rotation of the braid placed on the insulator holding part. Therefore, the braid holding belt is applied to the outer periphery of the insulator protection portion via the braid covered by the insulator protection portion, and the braid holding belt is simply tensioned by the tension applying means. Even by the belt, it is possible to suppress the braid Kabusare in the insulator protection part in preventing unraveling. And it can prevent that rotation of an electric wire is prevented by an assembly pressing belt by circulation rotation of an assembly pressing belt by a rotation mechanism.

<Embodiment>
The braid cutting apparatus 1 according to this embodiment includes an electric wire 3 in which an insulator 3b, a braid (for example, a single or multiple braid) 3c, and a jacket 3d are sequentially coated on the outer periphery of a center conductor 3a as shown in FIG. As shown in FIG. 2, the machine frame 5, the wire frame holding portion 7 that holds the electric wire 3, and is rotatably supported by the machine frame 5. The insulator protection unit 9 that is supported and protects the insulator 3b of the electric wire 3, the braid holding member 11 that suppresses the variation of the braid 3c of the electric wire 3, and the machine frame 5, and cuts the braid 3c of the electric wire 3. A cutting machine 13 and a rotation mechanism 15 that is disposed in the machine casing 5 and rotates the wire holding part 7 and the insulator protection part 9 in conjunction with each other are provided.

  As shown in FIGS. 2 and 3, the wire holding portion 7 has a wire holding portion main body 7a whose inner diameter is formed in a cylindrical shape that is substantially the same as the outer diameter of the electric wire 3, and one end portion 7b of the wire holding portion main body 7a. A cylindrical fastening member 7c that is detachably attached (here screwed) to the outer periphery of the wire and an other end portion 7d of the electric wire holding portion main body 7a are fixed in an outer fitting manner, and the braid holding member 11 is detachable. A cylindrical braided pressing member mounting portion 7e to be mounted (screwed here) and a wire holding portion 7a concentrically fixed to the outer periphery of the electric wire holding portion main body 7a and meshed with a gear 15b described later of the rotating mechanism 15. 1 gear 7f, and a pair of flange portions 7g that are provided on the outer periphery of the electric wire holding portion main body 7a at a predetermined interval and restrict the position of the electric wire holding portion main body 7a in the cylinder axis direction.

  A plurality of slit-shaped cuts 7n for reducing the diameter from the opening side on the one end 7b side along the cylinder axis direction are provided on the cylindrical peripheral wall of the one end 7b of the electric wire holding portion main body 7a (for example, four in the vertical and horizontal directions). Is provided. Further, on the outer peripheral surface of the one end portion 7b, a thread 7h for screwing with the tightening member 7c is formed. The outermost peripheral surface portion 7i of the outer peripheral surface of the one end portion 7b is inclined so that the outer diameter at the outermost peripheral surface portion 7i becomes gradually tapered.

  A screw groove 7j is formed on the inner peripheral surface of the tightening member 7c. The screw groove 7j is screwed with the screw thread 7h of the wire holding portion main body 7a. Further, the outermost peripheral surface portion 7k on the inner peripheral surface of the tightening member 7c is inclined so that the inner diameter at the outermost peripheral surface portion 7k is gradually tapered.

  The braided pressing member mounting portion 7e is fixed to the other end portion 7d of the electric wire holding portion main body 7a so as to protrude appropriately from the other end portion 7d of the electric wire holding portion main body 7a. A thread groove 7m for screwing with the braided pressing member 11 is formed on the inner peripheral surface of the protruding portion.

  The electric wire holding part 7 configured in this manner is attached to the machine frame 5 so that the movement in the cylinder axis direction is restricted by the pair of flange parts 7g in the portion between the pair of flange parts 7g. It is rotatably supported by the disposed support portion 5a.

  In order to hold the electric wire 3 in the electric wire holding portion 7, the tightening member 7c is temporarily attached to the one end portion 7b of the electric wire holding portion main body 7a (that is, not sufficiently screwed to the back of the one end portion 7b). State), the electric wire 3 is inserted into the electric wire holding portion main body 7a so that one end portion of the electric wire 3 protrudes from the other end portion 7d side of the electric wire holding portion main body 7a, and the fastening member 7c is connected to the electric wire in the inserted state. Fully attached to one end portion 7b of the holding portion main body 7a (that is, completely screwed to the back of the one end portion 7b). By this actual mounting, the outermost peripheral surface portion 7k of the inner peripheral surface of the fastening member 7c presses against the outermost peripheral surface portion 7i of the one end portion 7b of the wire holding portion main body 7a from the outer peripheral side, and the one end portion 7b is reduced in diameter. With this diameter reduction, the electric wire 3 inserted into the electric wire holding portion main body 7a is held in a fixed shape.

  In this holding state, the cylinder axis of the electric wire holding part 7 and the axis of the electric wire 3 coincide. When the electric wire holding part 7 is rotated around the cylinder axis in this holding state, the electric wire 3 is rotated around the axial center together with the electric wire holding part 7.

  As shown in FIGS. 2 and 4, the insulator protector 9 includes an insulator protector main body 9 a that is formed in a cylindrical shape whose inner diameter is substantially the same as the outer diameter of the insulator 3 b of the electric wire 3, and the insulator protector. A second gear 9 b that is concentrically fixed to the outer periphery of the main body 9 a and meshes with a gear 15 f described later of the rotation mechanism 15 is provided.

  The outermost peripheral surface portion 9e of the outer peripheral surface of the distal end portion 9d of the insulator protection portion main body 9a is inclined so that the outer diameter at the outermost peripheral surface portion 9e is gradually tapered. A groove 9i into which a cutting edge of a rotary blade 13a described later of the cutting machine 13 enters is annularly provided on the outer peripheral surface of the distal end portion 9d. In addition, a thick portion 9h whose outer diameter is increased by one step is formed at the rear portion of the tip portion 9d, and a screw thread for screwing the braided pressing member 11 onto the outer peripheral surface of the thick portion 9h. 9f is formed.

  The large diameter portion 9h and the second gear 9b also serve as a flange portion for restricting the position of the insulator protection portion main body 9a in the cylinder axis direction.

  The insulator protection part main body 9a configured in this way is moved in the cylinder axis direction by the large diameter part 9h and the second gear 9b in the part between the large diameter part 9h and the second gear 9b. Is supported by a support portion 5b disposed in the machine casing 5 so as to be freely rotatable. And in this support state, the insulator protection part main body 9a is the state in which the front-end | tip part 9d was orient | assigned to the electric wire holding part 7 side, and the electric wire 3 hold | maintained at the electric wire holding part 7 (namely, electric wire 3 hold | maintained at the electric wire holding part 7). On the extended line of the shaft center).

  And in this insulator protection part main body 9a, the insulator 3b of the electric wire 3 is protected by inserting the insulator 3b of the electric wire 3 in the cylinder of the front-end | tip part 9d. In that case, the braid 3c of the electric wire 3 is covered with the outer periphery of the front-end | tip part 9d.

  As shown in FIGS. 2 and 4, the braid holding member 11 includes a tubular braid holding member main body 11 a that is detachably attached (screwed here) to the outer periphery of the distal end portion 9 d of the insulator protection portion 9, and the braid. The braid 3c is disposed on the inner peripheral surface of the pressing member main body 11a, and the braided pressing member main body 11a is attached to the outer periphery of the distal end portion 9d of the insulating body protecting portion 9 so as to cover the braid 3c. And a ring-shaped elastic member (for example, an O-ring) 11b that is mounted on the outer periphery.

  In the braided pressing member main body 11a, the inner diameter on the one end 11c side is formed slightly larger than the outer diameter of the distal end 9d of the insulator protection part 9 (about the thickness of the braid 3c of the electric wire 3), and the other end The inner diameter on the part 11d side is formed to be approximately the same size as the outer diameter of the large diameter part 9h of the insulator protection part 9. A thread 11e is formed on the outer peripheral surface on the one end 11c side to be screwed into the thread groove 7m of the braided pressing member mounting portion 7e of the electric wire holding portion 7. Further, a positioning groove 11f is annularly provided on the inner peripheral surface on the one end 11c side, and a ring-shaped elastic member 11g is disposed in the positioning groove 11f. Further, on the inner peripheral surface on the other end portion 11d side, a screw groove 11h that is screwed into the screw thread 9f of the insulator protection portion 9 is formed.

  The braid holding member 11 is initially detachably attached to the braid holding member mounting portion 7e of the electric wire holding portion 7.

  The braided pressing member 11 configured in this way has one end of the insulator 3b of the electric wire 3 inserted into the cylinder of the tip 9d of the insulator protector 9 and the outer periphery of the tip 9d of the insulator protector 9. In a state where the braid 3c of the electric wire 3 is covered, the insulator protection portion 9 is fitted and screwed onto the outer periphery of the distal end portion 9d from the distal end portion 9d side. In this screwed state, the ring-shaped elastic member 11g disposed on the braid holding member 11 is wrapped around the outer periphery of the braid 3c covered by the insulator protection portion 9, and the braid 3c is attached by the ring-shaped elastic member 11g. It is pressed so that it does not come apart. Further, in this screwed state, the braid holding member 11 is disposed behind the groove 9 i in the distal end portion 9 d of the insulator protection portion 9.

  As shown in FIG. 2, the cutting machine 13 includes, for example, a substantially circular rotary blade 13a, and a drive unit 13b such as a motor that rotationally drives the rotary blade 13a around its central axis.

  This cutting machine 13 is connected via an approach / separation mechanism (not shown) so that the rotary blade 13a can approach and separate from the insulator protection part 9 in a state perpendicular to the cylinder axis direction of the insulator protection part 9. The machine frame 5 is arranged. When the cutting machine 13 approaches the insulator protection part 9, the cutting edge of the rotary blade 13 a enters the groove 9 i of the tip part 9 d of the insulator protection part 9.

  As shown in FIG. 2, the rotation mechanism 15 is rotatably disposed on the first shaft portion 15 a that is horizontally fixed to the machine frame 5, and is engaged with the first gear 7 f of the electric wire holding portion 7. The first gear 15b, the first pulley 15c concentrically fixed to the third gear 15b, and the second shaft portion 15d rotatably disposed horizontally on the support portion 5b of the machine frame 5 are concentric. A fourth gear 15f that meshes with the second gear 9b of the insulator protection part 9, a second pulley 15g concentrically fixed to the second shaft part 15d, and the machine frame 5 A third pulley 15i and a fourth pulley 15j that are concentrically fixed to a third shaft portion 15h that is rotatably disposed horizontally; a handle portion 15k that is fixed to the third shaft portion 15h; A first annular belt 15m hung across the first pulley 15c and the third pulley 15i, a second pulley 15g and a fourth pulley And a second annular belts 15n hung over the drive 15j.

  In the rotating mechanism 15, when the handle portion 15k is manually rotated, the third pulley 15i and the fourth pulley 15j are rotated via the third shaft portion 15h. Then, the rotation of the third pulley 15i causes the first pulley 15c to rotate via the first annular belt 15m, and the rotation causes the first gear f of the electric wire holding portion 7 to rotate via the third gear 15b. The electric wire holding part 7 is rotated around its cylinder axis. On the other hand, in conjunction with this, the rotation of the fourth pulley 15j causes the second pulley 15g to rotate via the second annular belt 15n, and this rotation causes the fourth gear 15f to rotate. The second gear 9b of the insulator protection part 9 is rotated, and the insulator protection part 9 is rotated around the cylinder axis at the same speed as the wire holding part 7. In this way, when the handle portion 15k is rotated, the wire holding portion 7 and the insulator protection portion 9 are rotated in conjunction with each other.

  Next, the operation of the braid cutting apparatus 1 will be described.

  First, as shown in FIG. 1, an electric wire 3 is prepared in which the outer skin 3d is peeled off at one end thereof to expose the braid 3c.

  Then, as shown in FIG. 3, the electric wire 3 is inserted into the electric wire holding portion 7 from the one end portion 7b side of the electric wire holding portion 7, and one end portion of the electric wire 3 (one end portion where the braid 3c is exposed) is connected to the electric wire holding portion. 7 is projected from the other end 7d. Then, as shown in FIG. 4, the projected insulator 3 b at one end is inserted into the cylinder of the tip end portion 9 d of the insulator protector 9, and the projected braid 3 c is inserted into the insulator protector 9. It covers the outer periphery of the tip portion 9d. In this state, the fastening member 7c temporarily attached to the one end portion 7b of the wire holding portion main body 7a is permanently attached to the one end portion 7b (that is, screwed to the back of the one end portion 7b), and the electric wire 3 Is held by the electric wire holding part 7.

  Then, as shown in FIG. 4, the braid holding member 11 that is initially detachably attached to the electric wire holding portion 7 is detached, and the braid holding member 11 is moved along the electric wire 3 to the tip of the insulator protection portion 9. It is moved to the outer periphery of 9d and attached to the tip 9d. In this mounted state, the ring-shaped elastic member 11b provided on the braid holding member 11 is wrapped around the outer periphery of the braid 3c covering the distal end portion 9d of the insulator protection portion 9, and the ring-shaped elastic member 11b provides insulation. The braid 3c placed on the distal end portion 9d of the body protecting portion 9 is pressed so as not to be separated.

  And the insulator protection part 9 is inserted into the groove 9i of the tip 9d so that the cutting edge of the rotary blade 13a is pressed against the braid 3c covered by the tip 9d of the insulator protection part 9. Translate to the side.

  In this state, the rotary blade 13a is driven to rotate, and the handle portion 15k is manually rotated to rotate the wire holding portion 7 and the insulator protection portion 9 in conjunction with each other. 3 is rotated around its axis. Thereby, the braid 3c is cut | disconnected along the circumferential direction by the rotary blade 13a.

  According to the braid cutting device 1 configured as described above, the braid 3c of the electric wire 3 is covered with the outer periphery of the tip 9d of the insulator protector 9 so that the tip 9d of the insulator protector 9 is covered. One end of the insulator 3b of the electric wire 3 is inserted into the cylinder, and the cutting edge of the rotary blade 13a is in the cylinder axis direction of the insulator protector 9 with respect to the braid 3c covered by the tip 9d of the insulator protector 9 The braid 3c is cut along the circumferential direction by the rotary blade 13a when the electric wire 3 is rotated around the axis thereof, that is, the insulator protection portion 9 is pressed. Since the braid 3c of the electric wire 3 is cut by the rotary blade 13a in a state where the insulator 3b of the electric wire 3 is protected, the braid 3c is prevented from being cut by the rotary blade (that is, the cutting blade) 13a. Can be cut.

  Further, since the braid holding member 11 is mounted on the insulator protection unit 9 so as to press the braid 3c covered on the outer periphery of the insulator protection unit 9, the braid 3c of the electric wire 3 is separated by the braid holding member 11. Can be prevented.

  Moreover, since the electric wire 3 is rotated by holding the electric wire 3 by the electric wire holding portion 7 and rotating the electric wire holding portion 7 by the rotation mechanism 15, the electric wire 3 can be smoothly rotated around its axis. At that time, the insulator protection part 9 is rotatably supported, and the insulator protection part 9 is rotated by the rotation mechanism 15 in conjunction with the rotation of the wire holding part 7, so that the insulator protection part 9 is covered. It is possible to prevent the braid 3c from being disturbed.

  Further, since the groove 9i into which the cutting edge of the rotary blade 13a enters is annularly provided on the outer peripheral surface of the tip portion 9d of the insulator protection part 9, the cutting edge of the rotary blade 13a enters the groove 9i via the braid 3c. As a result, the braid 3c can be cut more completely without being left uncut.

  Further, the electric wire holding portion 7 is provided with a plurality of slit-shaped cuts 7n for reducing the diameter along the cylindrical axis direction from the opening side of the one end portion on the cylindrical peripheral wall of the one end portion 7b, and the electric wire 3 is provided in the cylinder. The wire holding portion main body 7a to be inserted and the outer end of the one end portion 7b of the electric wire holding portion main body 7a are detachably attached, and the end portion 7b is tightened from the outer peripheral side to reduce the diameter in the attached state. Since the cylindrical fastening member 7c for holding the electric wire 3 inserted into the main body 7a is provided, the electric wire 3 can be firmly held.

  The braid holding member 11 is disposed on a cylindrical braid holding member main body 11a that is detachably mounted on the outer periphery of the insulator protection portion 9, and an inner peripheral surface of the braid holding member main body 11a. Since the main body 11a is provided with the ring-shaped elastic member 11b that is wrapped around the outer periphery of the braid 3c covered by the insulator protection portion 9 in a state where the main body 11a is mounted on the outer periphery of the insulator protection portion 9, the braid holding member main body 11a Is attached to the outer periphery of the insulator protection part 9 via the braid 3c, so that the braid 3c can be held by the ring-shaped elastic member 11b disposed on the braid holding member main body 11a.

  In this embodiment, the rotating mechanism 15 is manually moved by the handle portion 15k. However, the rotating mechanism 15 may be moved electrically, for example, using a driving means such as a motor instead of the handle portion 15k.

<Modification 1>
Further, in the above-described embodiment, a plurality of slit-like cuts for reducing the diameter are provided on the cylindrical peripheral wall of the distal end portion 9d of the insulator holding portion 9 from the opening side of the distal end portion along the cylindrical axis direction, thereby holding the insulator. The braided holding member attached to the outer periphery of the tip portion 9d of the portion 9 is tightened from the outer peripheral side to reduce the diameter by tightening the tip portion 9d so that the insulator 3 inserted into the tip portion 9d is held in a fixed state. It may be. In this way, it is possible to prevent the insulator 3b of the electric wire inserted into the tip end portion 9d of the insulator holding portion 9 from being detached from the tip end portion 9d of the insulator holding portion 9.

<Modification 2>
In the above embodiment, the braided presser member 11 is a cylindrical braided presser member main body 11a and a ring-shaped elastic member 11b, and the braided member 3c of the electric wire 3 is pressed so as not to be scattered. As shown in FIG. 5, the main difference is that the braid 3c of the electric wire 3 is pressed so as not to be scattered by using an annular braid press belt 17b as the braid presser member 17 mainly. Only differences from the above embodiment will be described below.

  That is, the braid holding member 17 of this modified example is a pulley fixed concentrically (that is, rotatably supported) to a rotatable shaft portion 19a of a rotating mechanism 19 described later, as shown in FIGS. 17a, an annular braid holding belt 17b hung over the outer periphery of the distal end portion 9d of the insulator protection portion 9 and the pulley 17a via the braid 3c covered on the distal end portion 9d of the insulator protection portion 9, and the braid presser The guide 17c and the fixed pulley 17d (FIG. 6) that define the path of the belt 17b and the braid holding belt 17b are tensioned, and the braid covered by the braid holding belt 17b on the tip 9d of the insulator protection unit 9 And tension applying means 17e (FIG. 6) for pressing 3c.

  The guide portion 17c, the fixed pulley 17d, and the tension applying means 17e are fixed to a machine frame (not shown) (corresponding to the machine frame 5 of the above embodiment).

  As shown in FIG. 6, the tension applying mechanism (tension applying means) 17e is connected to the movable pulley (here, the braided holding belt 17b is sandwiched by a connecting member 17f so as to sandwich the braided holding belt 17b). A pair of movable pulleys) 17g and the movable pulley 17g are supported so as to be reciprocally movable in a predetermined direction (for example, lateral direction), and the movable pulley 17g is pulled and moved in the lateral direction. In addition to applying tension to the braided presser belt 17b by pulling the presser belt 17b, a tension device (for example, an air or hydraulic cylinder) 17h that releases the pull of the movable pulley 17g and loosens the braided presser belt 17b is provided. .

  In the tension applying mechanism 17e configured as described above, when the braid 3c of the electric wire 3 is put on the outer periphery of the distal end portion 9d of the insulator protection portion 9, the pulling of the movable pulley 17g by the tension device 17h is released to suppress the braid. The belt 17b is loosened, and the braid 3c of the electric wire 3 is put on the outer periphery of the tip 9d of the insulator protection part 9, and the braid holding belt is attached to the outer periphery of the tip 9d of the insulator protector 9 via the braid 3c. After applying 17b, the moving pulley 17g is pulled by the tension device 17h to apply tension to the braid holding belt 17b, and the braid 3c is pressed by the braid holding belt 17b. By pressing the braid holding belt 17b, the braid 3c is pressed by the braid holding belt 17b so that it does not come apart in a range where it comes into contact with the braid holding belt 17b.

  In this modification, the rotary blade 13a of the cutting machine 13 is pressed against the side of the braid 3c that is pressed by the braid holding belt 17b.

  As shown in FIG. 5, the electric wire holding portion 7 of this modification is concentrically around the outer circumference of the electric wire holding portion main body 7 a instead of the first gear 7 f as compared with the electric wire holding portion 7 of the above embodiment. The construction is the same except that the fixed pulley 7p is provided and the braid holding member mounting portion 11e is omitted, and the machine frame is rotated in the same manner as in the above embodiment. (The electric wire holding part 7 in FIG. 5 is shown with a simplified tightening member 7c and the like for convenience).

  Further, as shown in FIG. 5, the insulator protection portion 9 of this modified example has an outer periphery of the insulator protection portion main body 9 a instead of the second gear 9 b as compared with the insulator protection portion 9 of the above embodiment. In the same manner as in the case of the above-described embodiment, the machine frame is configured in the same manner except that it is provided with a pulley 9j concentrically fixed to the head and a screw thread 11h is omitted. The insulator protection unit 9 in FIG. 5 is simplified and shown for convenience.

  Further, as shown in FIG. 5, the rotating mechanism 19 of this modification includes a shaft portion 19a rotatably supported by the machine frame, two pulleys 19b and 19c concentrically fixed to the shaft portion 19a, and a pulley. 7p and a first annular belt 19e hung over the pulley 19b, a second annular belt 19f hung over the pulley 9j and the pulley 19c, and a drive such as a motor for rotating the shaft portion 19a. Part 19d. A pulley 17a is concentrically fixed to the shaft portion 19a.

  In the rotation mechanism 19 configured as described above, when the shaft portion 19a is rotationally driven by the drive portion 19d, the pulleys 19b, 19c, and 17a are rotated along with the rotation of the shaft portion 19a. The pulley 7p is rotated by the rotation of the pulley 19b via the first annular belt 19e, and the electric wire holding portion 7 is rotated around the cylinder axis by the rotation, and is held by the electric wire holding portion 7 by the rotation. The electric wire 3 is rotated around its axis. Further, in conjunction with this, the pulley 9j is rotated through the second annular belt 19f by the rotation of the pulley 19c, and this rotation causes the insulator protection portion 9 to rotate around the cylinder axis at the same speed as the wire holding portion 7. It is rotated. In conjunction with these, the braid holding belt 17b is circulated and rotated at the same speed as that of the braid 3c covered on the tip 9d of the insulator protection part 9 by the rotation of the pulley 17a. The braid 3c covered on the tip 9d of the insulator protection part 9 is pressed by the pressing belt 17a so as not to be separated.

  Note that the description of the operation of the braid cutting apparatus 1B of this modification is the same as that of the braid cutting apparatus 1 of the above-described embodiment except for the differences due to the differences in the above-described configuration, and is therefore omitted.

  According to the electric wire cutting device 1B configured as described above, the braid holding member 17 is provided with the insulator protection portion 9 via the pulley 17a rotatably supported and the braid 3c covered on the insulator protection portion 9. A tension is applied to the annular braid holding belt 17b and the braid holding belt 17b that are hung on the outer periphery of the pulley 17a and the braid holding belt 17b, and the braid 3c covered on the insulator protection portion 9 is pressed by the braid holding belt 17b. The braid 3c covered on the insulator holding part 9 by rotating the pulley 17a in conjunction with the rotation of the wire holding part 7 and the insulator protecting part 9 by the rotation mechanism 19 by the tension applying mechanism 17e. The braid holding belt 17b is circulated and rotated in accordance with the rotation of the braided belt, so that the braid holding belt 17b is passed through the braid 3c covered by the insulator protecting section 9 and the insulator holding belt. Only by applying tension to the braid holding belt 17b by the tension applying mechanism 17e on the outer periphery of the portion 9, the braid 3c covered on the insulator protection portion 9 is pressed by the braid holding belt 17b so as not to be scattered. Can do. The rotation of the electric wire 3 can be prevented from being hindered by the braided presser belt 17b due to the circulating rotation of the presser belt 17b by the rotating mechanism 19.

It is sectional drawing of the side view of an electric wire. 1 is a schematic configuration diagram of a braided cutting device according to an embodiment of the present invention. It is an expanded sectional view of the electric wire holding part 7 of FIG. It is an expanded sectional view of the insulator protection part 9 of FIG. It is the simplification block diagram of the braid cutting device which concerns on a modification. It is VI-VI cross-sectional schematic of FIG. It is the structure schematic of the conventional braid cutting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1B Braid cutting device 3 Electric wire 3b Insulator 3c Braid 7 Electric wire holding part 7a Electric wire holding part main body 7c Tightening member 7e Braided pressing member mounting part 7f First gear 7n Notch 7p Pulley 9 Insulator protective part 9a Insulator protection Main body 9b Second gear 9d Tip 9i Groove 9j Pulley 11 Braided pressing member 11a Braided pressing member main body 11b Ring-shaped elastic member 11f Positioning groove 11g Ring-shaped elastic member 13 Cutting machine 13a Rotary blade 15 Rotating mechanism 15b Third gear 15c pulley 15f fourth gear 15g pulley 15i third pulley 15j fourth pulley 15k handle portion 15m first annular belt 15n second annular belt 17 braid holding member 17a pulley 17b braid holding belt
17e Tension applying mechanism 19 Rotating mechanism 19b, 19c Pulley 19d Drive portion 19e First annular belt 19f Second annular belt

Claims (6)

A braid cutting device for cutting the braid of an electric wire in which at least an insulator, a braid, and a jacket are sequentially formed on the outer periphery of a central conductor,
An electric wire holding part that holds the electric wire with the outer cover peeled off at one end and the braid is exposed, and is rotatably supported around the electric wire along with the electric wire;
Formed in a cylindrical shape, supported coaxially and rotatably on an extension of the axis of the electric wire held by the electric wire holding portion, and on the outer periphery of the tip portion of the electric wire held by the electric wire holding portion Insulator protection part into which one end part of the insulator of the electric wire held by the electric wire holding part is inserted into the cylinder at the tip part so that the braid exposed at the one end part is covered;
A braid holding member that is mounted on the insulator protection portion so as to hold the braid covered on the outer periphery of the insulator holding portion;
A rotary blade that is supported so as to be rotatable around its central axis and is pressed against the braid covered by the insulator protection portion so that the cutting edge is orthogonal to the cylinder axis direction of the insulator protection portion;
The wire holding part and the insulator protection part are rotated in conjunction with each other, and the electric wire held by the electric wire holding part is rotated around its axis, whereby the braid is moved in the circumferential direction by the rotary blade. A rotation mechanism for cutting along
A braided cutting device comprising:   The braided cutting device according to claim 1, wherein a groove into which a cutting edge of the rotary blade enters is annularly provided on an outer peripheral surface of the tip portion of the insulator protection portion. The wire holding part is
An electric wire that is formed in a cylindrical shape, and is provided with a plurality of slit-shaped notches for diameter reduction from the opening side of the one end along the cylindrical axis direction on the cylindrical peripheral wall of the one end, and the electric wire is inserted into the cylinder A holding body,
The electric wire inserted into the electric wire holding part main body is detachably attached to the outer periphery of the one end part of the electric wire holding part main body, and the one end part is tightened from the outer peripheral side to reduce the diameter in the attached state. A cylindrical fastening member to be held;
The braid cutting apparatus according to claim 1 or 2, further comprising: The braid holding member is
A tubular braided pressing member main body detachably mounted on the outer periphery of the insulator protection section;
The braided pressing member main body is disposed on the inner peripheral surface of the braided pressing member main body, and the braided pressing member main body is attached to the outer periphery of the insulator protecting portion. A ring-shaped elastic member to be mounted;
The braid cutting apparatus according to any one of claims 1 to 3, further comprising: A plurality of slit-shaped cuts for reducing the diameter are provided on the cylindrical peripheral wall of the distal end portion of the insulator holding portion from the distal end opening side along the cylindrical axis direction,
The braided holding member mounted on the outer periphery of the distal end portion of the insulator holding portion holds the insulator inserted into the distal end portion by tightening the distal end portion from the outer peripheral side and reducing the diameter. The braided cutting device according to claim 4, wherein The braid holding member is
A rotatably supported pulley;
An annular braid holding belt that is hung on the outer periphery of the insulator protection part via the braid covered by the insulator protection part and hung on the pulley;
Tension applying means for applying tension to the braid holding belt and pressing the braid covered on the insulator protection portion by the braid holding belt;
With
The rotating mechanism rotates the pulley in conjunction with the rotation of the electric wire holding part and the insulator protection part, so that the braid holding belt is rotated in accordance with the rotation of the braid placed on the insulator holding part. The braid cutting apparatus according to any one of claims 1 to 5, wherein the braid cutting apparatus is circulated and rotated.

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