JP2014150663A - Lump cutting device of covered conductor, device of manufacturing covered conductor, method of cutting lump of covered conductor, and method of manufacturing covered conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress deviation of a covered conductor from a processing line even when lumps are formed on a covered conductor to be subjected to extrusion coating.SOLUTION: A lump cutting device of a covered conductor applied to the processing line of a device for manufacturing a covered conductor by extrusion coating the outer periphery of a core wire with an insulator while conveying the core wire along the processing line includes a cutting section for cutting the lumps of a covered conductor being conveyed along the processing line, and a holding section for holding the cutting section.

Description

  The present invention relates to a technique for manufacturing a covered electric wire.

  Conventionally, a covered electric wire (“insulated electric wire”) wired to a vehicle such as an automobile is composed of a conductor (“core wire”) in which a plurality of strands are twisted and covered with an insulator. ing. As a manufacturing apparatus for manufacturing such a covered electric wire, for example, Patent Document 1 discloses an apparatus for continuously manufacturing a covered electric wire by extrusion-coating an insulator on a conductor while conveying the conductor. .

  The manufacturing apparatus disclosed in Patent Document 1 includes a conductor along a processing line between a conductor supply unit (sending bobbin) that supplies a conductor and a wire winding unit (winding bobbin) that winds and houses the manufactured covered electric wire. Is transported. The conductor is transported along the processing line while the path is restricted by a roller having a guide groove formed on the outer peripheral surface for guiding the conductor. Then, an extrusion coating apparatus installed in the middle of the processing line sequentially supplies the melted insulator to the outer periphery of the conductor being conveyed, and forms the coating (“coating layer”) on the outer periphery of the conductor. By doing so, a covered electric wire is continuously manufactured.

  When the stopped production apparatus is operated, the conveyance of the conductor and the extrusion coating are started. The conductor is accelerated from a stopped state and then conveyed at a predetermined linear velocity. Extrusion coating by the extrusion coating apparatus is also performed in each of the conductor acceleration process and the conveyance process at the linear velocity.

  It is desirable that the outer diameter of the coated electric wire to be manufactured is always a predetermined diameter based on specifications. However, in an apparatus that performs extrusion coating while transporting a conductor, such as the manufacturing apparatus disclosed in Patent Document 1, a bump may be formed on the outer surface of the coated wire. Since the covered electric wire with the bump is inconvenient in use, the portion of the covered electric wire wound around the electric wire winding portion where the bump is formed is cut out and discarded. A lot of bumps are generated at the time of acceleration in which the conducting wire is accelerated from a stopped state to a predetermined linear velocity.

JP-A-5-294561

  In the manufacturing apparatus of Patent Document 1, when a bump is formed on a covered electric wire, the covered electric wire may come off the roller. In this case, since it is necessary to stop the manufacturing apparatus and rebuild the covered electric wire, there is a problem that productivity of the covered electric wire is lowered.

  The present invention has been made to solve these problems, and an object of the present invention is to provide a technique that can suppress derailment of a covered wire from a processing line even when a bump is formed on the covered wire manufactured by extrusion coating. And

  In order to solve the above problems, the apparatus for cutting a coated electric wire according to the first aspect is a method of manufacturing a coated electric wire by extruding an insulator on the outer periphery of the core wire while conveying the core wire along the processing line. A device for cutting a coated electric wire that is applied to a processing line of the apparatus, a cutting unit that performs a cutting process for cutting the coated wire that is being conveyed along the processing line, and a holding unit that holds the cutting unit With.

  The bump cutting device for a covered electric wire according to the second aspect is the bump cutting device for the covered electric wire according to the first aspect, wherein the cutting portion includes one or more rotary cutting members.

  The coated wire hobbing device according to the third aspect is a coated wire hobbing device according to the second embodiment, wherein the rotating cutting member is a plurality of rotating cutting members, and the plurality of rotating cutting members. Are arranged so that their circumferential positions around the axis of the covered electric wire are different from each other.

  The bump cutting device for a covered electric wire according to a fourth aspect is a bump cutting device for the covered electric wire according to the third aspect, and when viewed from the axial direction of the covered electric wire among the plurality of rotary cutting members, The rotary cutting members adjacent to each other in the circumferential direction are arranged at positions that do not overlap each other in the axial direction of the covered electric wire.

  The coated wire hobbing device according to the fifth aspect is a coated electric wire hobbing device according to the third or fourth aspect, wherein the holding portion is configured such that when the cutting portion cuts the cobb, The cutting part is held so that the positions of the rotation axes of the plurality of rotary cutting members in the circumferential direction are fixed.

  The coated wire bump cutting apparatus according to the sixth aspect is a coated wire bump cutting apparatus according to the fourth or fifth aspect, wherein a part of the cutting region between the mutually adjacent rotary cutting members is the They overlap each other when viewed from the axial direction of the covered electric wire.

  The coated wire hump cutting device according to a seventh aspect is a coated wire hump cutting device according to any one of the second to sixth aspects, wherein each of the one or more rotary cutting members is the coated wire. The space between the electric wire and the rotary cutting member is disposed so as to gradually become narrower toward the downstream side of the processing line.

  The coated wire hump cutting device according to an eighth aspect is the coated wire hump cutting device according to any one of the second to seventh aspects, wherein the holding portion includes the one or more rotary cutting members. A position adjustment unit that adjusts the positions of the plurality of rotary cutting members by moving each of them in the radial direction of a circle centered on the axis of the covered electric wire is further provided.

  According to a ninth aspect of the present invention, there is provided a coated electric wire bump cutting apparatus according to any one of the second to eighth aspects, wherein the one or more rotary cutting members are arranged on an outer periphery of a cylindrical body. And a cylindrical cutter provided with a spiral cutting blade.

  The coated wire hobbing device according to the tenth aspect is the coated electric wire hobbing device according to any one of the second to eighth aspects, wherein the one or more rotary cutting members are arranged on an outer periphery of a cone. And a conical cutter provided with a spiral cutting blade.

  The coated wire bump cutting apparatus according to the eleventh aspect is the coated wire bump cutting apparatus according to any one of the first to tenth aspects, wherein the coated wire is disposed downstream of the cutting portion in the processing line. A vibration suppression unit that suppresses the vibration of the covered electric wire by contacting the electric wire is further provided.

  The bump cutting device for a covered electric wire according to a twelfth aspect is the bump cutting device for a covered electric wire according to the eleventh aspect, wherein the vibration suppressing unit suppresses the covered electric wire in a direction facing each other. A part.

  The device for manufacturing a covered electric wire according to a thirteenth aspect is a device for manufacturing a covered electric wire including the bump cutting device for a covered electric wire according to any one of the first to twelfth aspects, and is arranged along the processing line. The apparatus further includes a conveyance mechanism that conveys the core wire, and an extrusion coating device that extrudes and coats the insulator on the outer periphery of the core wire, and the bump cutting device is provided on the downstream side of the extrusion coating device in the processing line. Yes.

  A coated wire manufacturing apparatus according to a fourteenth aspect is a coated wire manufacturing apparatus according to a thirteenth aspect, wherein the extrusion coating is provided between the extrusion coating apparatus and the bump cutting apparatus in the processing line. A cooling unit for cooling the covered electric wire carried out of the apparatus is further provided.

  According to a fifteenth aspect of the method for cutting a coated electric wire according to the fifteenth aspect, a step of conveying a coated electric wire having an insulator extruded and coated on an outer periphery of a core wire along a processing line, and the coating being conveyed along the processing line And a step of cutting a bump formed on the covering of the electric wire.

  In the manufacturing method of the covered electric wire according to the sixteenth aspect, a coated wire is manufactured by extruding and coating an insulator on the outer periphery of the core wire in parallel with the conveying step of conveying the core wire along the processing line. A cutting step of cutting a bump formed on the covering of the covered electric wire that is covered in the covering step and is conveyed along the processing line in parallel with the covering step and the covering step. The removal process of removing the part in which the said bump was formed among the covered electric wires in which the said bump was cut in the said cutting process is provided.

  The method for manufacturing a covered electric wire according to a seventeenth aspect is the method for manufacturing a covered electric wire according to the sixteenth aspect, wherein the covered electric wire covered in the covering step is subjected to the treatment before the cutting step. A measuring step of measuring the outer diameter of the electric wire is further provided, and the cutting step is a step of cutting the bump when the outer diameter measured in the measuring step exceeds a reference value.

  According to the invention according to any of the first, thirteenth and fifteenth aspects, the bump formed on the coating is cut out of the covered electric wire conveyed along the processing line, so that the processing caused by the bump Derailment of the covered electric wire from the line can be suppressed.

  According to the third aspect of the invention, the one or more rotary cutting members have different positions in the circumferential direction around the axis of the covered electric wire, so the portion of the outer periphery of the covered electric wire that can cut the bump is more Become wider.

  According to the fourth aspect of the invention, the rotary cutting members adjacent to each other in the circumferential direction when viewed from the axial direction of the covered electric wire are arranged at positions that do not overlap with each other in the axial direction of the covered electric wire. The contact between adjacent rotary cutting members can be suppressed.

  According to the fifth aspect of the invention, a mechanism for revolving a plurality of rotary cutting members is not required, and the cutting portion can be reduced in size.

  According to the sixth aspect of the present invention, when viewed from the axial direction of the covered electric wire, part of the cutting region between the rotary cutting members adjacent to each other overlaps when viewed from the axial direction of the covered electric wire. Therefore, the bumps remaining on the covered electric wire can be further reduced.

  According to the seventh aspect of the invention, since the space between the covered electric wire and the rotary cutting member gradually becomes narrower toward the downstream side of the processing line, the occurrence of a collision between the bump and the rotary cutting member is suppressed. It is possible to cut various sizes of bumps.

  According to the eighth aspect of the invention, each of the one or more rotary cutting members is moved in the radial direction of a circle centered on the axis of the covered electric wire, and the position adjustment of the plurality of rotary cutting members is performed. Cobbs of covered electric wires having a wire diameter of can be cut.

  According to the eleventh aspect of the invention, the vibration suppressing portion abuts on the covered electric wire on the downstream side of the cutting portion in the processing line. Since the bump of the covered electric wire that has reached the vibration suppressing portion is cut, the vibration suppressing portion can be in closer contact with the covered electric wire, and the vibration of the covered electric wire can be further suppressed.

  According to the twelfth aspect of the present invention, the vibration suppressing unit suppresses the covered electric wires in directions facing each other, and therefore can further suppress the vibration of the covered electric wires.

  According to the invention according to the fourteenth aspect, the coated electric wire carried out from the extrusion coating apparatus is cooled and solidified by the cooling unit, and the cutting of the bumps by the hump cutting apparatus is performed in a state where it is easier to cut. The bump is cut more efficiently.

  According to the sixteenth aspect of the present invention, after the bumps formed on the coating of the covered electric wires that are covered in the coating step and are conveyed along the processing line are cut, the bumps are formed among the covered electric wires. The part that had been removed is removed. Therefore, it is possible to produce a covered electric wire in which the bump is cut while suppressing the deviation (derailment) of the covered electric wire from the treatment line caused by the bump. Furthermore, since the covered electric wire in which the portion where the bumps are formed is removed from the covered electric wire, the productivity of the covered electric wire can be increased.

  According to the seventeenth aspect of the invention, the outer diameter of the coated covered electric wire is measured before it is processed by the cutting process, and when the measured outer diameter exceeds the reference value, Is cut. Therefore, the covered electric wire can be manufactured while reducing the cutting cost of the bump.

It is a figure which illustrates schematic structure of the manufacturing apparatus of the covered electric wire which concerns on embodiment. It is a figure which illustrates schematic structure of the manufacturing apparatus of the covered electric wire which concerns on embodiment. It is sectional drawing which illustrates the structure of the covered electric wire by which the bump was formed in the coating | cover. FIG. 4 is a side view illustrating the configuration of the covered electric wire in FIG. 3. It is side surface sectional drawing which illustrates the structure of the bump cutting apparatus of the covered electric wire which concerns on embodiment. It is an upper surface sectional view which illustrates the composition of the lump cutting device of the covered electric wire concerning an embodiment. It is side surface sectional drawing which illustrates the structure of the bump cutting apparatus of the covered electric wire which concerns on embodiment. It is a figure which illustrates the composition of the rotary cutting member with which the lump cutting device of Drawing 5 is provided. It is a figure which illustrates the composition of the rotary cutting member with which the lump cutting device of Drawing 7 is provided. It is a figure which illustrates the cutting area | region of the cutting part with which the bump cutting apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, parts having the same configuration and function are denoted by the same reference numerals, and redundant description is omitted in the following description. Each drawing is schematically shown, and the size of the display object in each drawing is not necessarily shown accurately.

<About the embodiment>
FIG. 1 is a diagram illustrating a schematic configuration of a manufacturing apparatus 1001 that manufactures a coated electric wire 41 in which a bump formed on a coating is cut as an example of a coated electric wire manufacturing apparatus according to an embodiment. First, the manufacturing apparatus 1001 manufactures the covered electric wire 40 in the course of the conveyance by extruding an insulator such as a resin on the outer periphery of the core wire 20 while conveying the core wire 20 along the processing line L1. In the covered electric wire 40, the outer periphery of the core wire 20 is covered with a covering (“covering layer”) 25 (see FIGS. 3 and 4). The core wire 20 is a conductor (“twisted wire conductor”) in which a plurality of (19 in the figure) strands (“conductor strands”) including each strand 12 are twisted together. A bump (also referred to as “resin bump”) 27 may be formed on the surface of the covered electric wire 40, that is, the surface of the covering 25. The manufacturing apparatus 1001 cuts the bump 27 formed on the covering of the covered electric wire 40 while conveying the covered electric wire 40 along the processing line L1, and the covered electric wire 41 from which the bump 27 has been cut (shaved) is cut. To manufacture.

  The manufacturing apparatus 1001 includes, in order from the upstream side to the downstream side of the processing line L1, the core wire supply unit 35, the extrusion coating device 51, the outer diameter measuring device 52, the cooling unit 53, and the bump cutting device 54 (see FIG. 5 and FIG. 6) and a wire take-up portion 37. The manufacturing apparatus 1001 further includes a controller 57 that performs overall control of the entire manufacturing apparatus 1001. Further, the core wire supply unit 35 and the electric wire winding unit 37 constitute a transport mechanism 30. The manufacturing apparatus 1001 may include, for example, a bump cutting device 55 (see FIG. 7) as the bump cutting device.

  The conveyance mechanism 30 constructs the core wire 20 between the upstream core wire supply unit 35 and the downstream wire winding unit 37 of the processing line L1, and transports the core wire 20 along the processing line L1. The core wire supply unit 35 accommodates the core wire 20 by, for example, winding the core wire 20 around a cylindrical bobbin. The core wire supply unit 35 rotates in cooperation with the electric wire winding unit 37, thereby processing the accommodated core wire 20. And is supplied to the extrusion coating apparatus 51. The electric wire winding unit 37 includes a cylindrical bobbin, and rotates and cooperates with the core wire supply unit 35 to wind up and accommodate the covered electric wire 41 from which the bumps are cut. The core wire supply unit 35 and the wire winding unit 37 are driven by a rotation drive mechanism (not shown) and rotate in synchronization with each other.

  The extrusion coating device 51 is a general extrusion coating device, and supplies the melted insulator to the outer periphery of the core wire 20 being transported by the transport mechanism 30 and extrusion coats the insulator on the outer periphery of the core wire 20. The covered electric wire 40 in which the outer periphery of the core wire 20 is covered with the insulating coating 25 is manufactured. Although the thickness of the covering 25 is preferably substantially uniform, the bump 27 may be formed on the outer periphery of the covered electric wire 40. During the period from when the transport mechanism 30 is stopped to when the transport mechanism 30 starts transporting the core wire 20 until the core wire 20 is accelerated and the linear velocity reaches a constant speed, the bumps 27 are easily formed. The covered electric wire 40 covered by the extrusion coating apparatus 51 is conveyed to the outer diameter measuring machine 52.

  The outer diameter measuring device 52 is a general outer diameter measuring device that measures the outer diameter of an object by projecting and receiving a laser beam or the like, for example, and the outer diameter of the covered electric wire 40 conveyed along the processing line L1. The diameter is measured and a measurement signal is supplied to the controller 57. That is, the outer diameter measuring device 52 measures the outer diameter of the covered electric wire 40 before the coated electric wire 40 covered by the extrusion coating device 51 is subjected to the cutting process of the hump in the hump cutting device 54, and the measurement result is obtained from the controller 57. To supply. The controller 57 determines whether or not the measured outer diameter of the covered electric wire 40 exceeds the reference value based on the signal supplied from the outer diameter measuring device 52, and only when the outer diameter exceeds the reference value, the bump cutting device 54 is operated to cut the detected bumps. Thereby, even when the covered electric wire 40 on which no bump is formed passes, the driving of the bump cutting device 54 is suppressed, and energy saving can be achieved. For example, efficient cutting of the bumps and energy saving may be achieved by operating the bump cutting device 54 only during the acceleration period of the core wire on which the bumps are easily formed.

  The cooling unit 53 includes a water tank that stores water. The cooling unit 53 is disposed between the extrusion coating device 51 and the bump cutting device 54, and cools the coated electric wire 40 carried out from the extrusion coating device 51 to about a normal room temperature, thereby covering the coating 25 (cobbing). 27) is cured. The covered electric wire 40 is conveyed to the bump cutting device 54 in a state where the bump 27 is hardened and is easily cut.

  The bump cutting device 54 is provided on the downstream side of the cooling unit 53 in the processing line L 1, that is, on the downstream side of the extrusion coating device 51, and cuts the bump 27 formed on the covered electric wire 40 conveyed by the conveyance mechanism 30. Then, a cutting process for cutting the bump 27 is performed. The cutting process is performed in parallel with the extrusion coating process performed by the extrusion coating apparatus 51. Until the covered electric wire 40 passes through the cooling unit 53, the bumps 27 formed on the covered electric wire 40 are soft. For this reason, even when the roller which conveys the covered electric wire 40 is provided between the extrusion coating apparatus 51 and the cooling unit 53, the covered electric wire 40 hardly occurs from the roller. For this reason, the bump cutting device 54 is provided on the downstream side of the cooling unit 53.

  The covered electric wire 41, which is the covered electric wire 40 from which the bumps 27 have been cut, is conveyed to the electric wire winding unit 37 and is wound and accommodated in the electric wire winding unit 37. The portion of the covered electric wire 41 from which the bumps 27 are cut is finally removed and discarded. For this reason, the cutting of the bump 27 is performed so that the cutting trace of the bump 27 on the covered electric wire 41 has a size and shape that does not induce derailment (line deviation) of the covered electric wire 40 (41) from the processing line L1. It only has to be cut. That is, the cutting process of the bumps 27 does not have to be performed so that the cutting traces of the bumps 27 have the same shape and surface state as other portions where no bumps are formed. Therefore, the cross-sectional shape of the portion where the bumps 27 are cut off may not be circular.

  The controller 57 includes a computer and the like. The controller 57 performs overall control of various devices provided in the manufacturing apparatus 1001 by reading and executing a program stored in a storage device or the like. Specifically, the controller 57 is electrically connected to the transport mechanism 30, the extrusion coating device 51, the outer diameter measuring device 52, and the bump cutting device 54 (55). The controller 57 supplies control signals to these devices and receives various signals from these devices, thereby controlling the operation contents and timing of the operations of these devices.

  FIG. 2 shows a schematic configuration of a manufacturing apparatus 1002 that manufactures a covered electric wire 42 from which a portion where the bumps are formed is removed from the covered electric wire 41 from which the bumps are cut, as an example of the covered electric wire manufacturing apparatus according to the embodiment. FIG.

  The manufacturing apparatus 1002 mainly includes an electric wire winding unit 37, a removing unit 58, and an electric wire winding unit 39. In the manufacturing apparatus 1001, the electric wire winding section 37 is a part in which the electric wire winding section 37 that winds and houses the covered electric wire 41 with the bumps cut is conveyed and attached to the manufacturing apparatus 1002. The electric wire winding unit 39 includes a cylindrical bobbin, and winds and accommodates the covered electric wire 42 in which the portion where the bumps are formed from the covered electric wire 41 is removed by the removing unit 58 in the bobbin. The wire winding units 37 and 39 are driven by a rotation drive mechanism (not shown) and rotate in synchronization with each other, and the covered wire 41 (42) is moved along the processing line L2 to the wire winding unit 37 side (upstream side). To the wire winding part 39 side (downstream side). The carrying operation of the covered electric wire 41 (42) by the carrying mechanism 31 is controlled by an operator operating an operation panel (not shown) provided in the carrying mechanism 30.

  The removing unit 58 includes a cutting machine capable of cutting the covered electric wire conveyed along the processing line L2. The cutting process by the removing unit 58 is controlled by the operator operating an operation panel (not shown) provided in the removing unit 58.

  In the manufacture of the covered electric wire 42, first, the covered electric wire 41 is started to be conveyed along the processing line L2 by the conveying mechanism 31 in a state where the covered electric wire 41 is installed on the conveying mechanism 31. The operator observes the outer peripheral surface of the covered covered electric wire 41 and detects the cutting trace in which the bump 27 is cut from the covered electric wire 40 in the hump cutting device 54 (55) of the manufacturing apparatus 1001. When the cutting trace is detected, the operator operates the removing unit 58 to form the portion of the covered electric wire 41 where the cutting trace is recognized, that is, the bump 27 of the covered electric wire 41 from which the bump 27 is cut. The downstream side and the upstream side of the portion that has been made are cut, and the portion is removed from the covered electric wire 41. The part from which the cut marks of the bumps are removed is discarded. A portion of the covered electric wire 41 on the downstream side of the portion where the cutting trace is removed, that is, a portion of the covered electric wire 41 that has passed through the removing portion 58 without detecting the cutting trace of the bump 27 is a non-defective coated electric wire 42. As shown in FIG. In addition, the operator causes the end portion of the portion upstream of the removed portion of the covered electric wire 41 to be taken up by the electric wire winding portion 39, and the covered electric wire 41 is again installed on the transport mechanism 31. Thereafter, the detection of the cutting trace of the bump 27 in the covered electric wire 41 and the manufacturing process of the covered electric wire 42 by the removal process of the portion where the cutting trace is detected are repeated.

  Hereinafter, the bump cutting device 54 (55) will be described in more detail.

  The bump cutting device 54 includes a cutting unit 91 that performs the cutting process, a holding unit 121 that holds the cutting unit 91, and vibration suppression that suppresses the vibration of the coated electric wire by contacting the coated electric wire on the downstream side of the cutting unit 91. It is comprised mainly with the part 181 (refer FIG. 5, FIG. 6). The holding part 121 is cut so that the bumps 27 formed on the covering of the covered electric wire 40 conveyed along the processing line L1 enter the cutting region of the cutting part 91 that performs the cutting process. The unit 91 is held.

  The cutting unit 91 performs a cutting process of cutting the bumps 27 of the covered electric wire 40 being conveyed along the processing line L1. The cutting unit 91 includes a plurality (four pieces) of rotating cutting members 81a to 81d that rotate around a rotation axis. The rotary cutting member 81a is a cylindrical cutter in which a spiral cutting blade 72 is provided on the outer periphery of the cylindrical body 71 (see FIG. 8). The rotary cutting member 81 a is provided with a rotary shaft 75 that passes through the symmetry axis (center axis) of the cylindrical body 71. The rotary cutting member 81 a is attached to the holding unit 121, and rotates about the rotation shaft 75 by the rotation of the motor 61 and performs a cutting process with the cutting blade 72. The rotary cutting members 81b to 81d also have the same configuration and size as the rotary cutting member 81a.

  The holding unit 121 includes a rectangular tubular housing 101 into which the covered electric wire 40 is inserted, a plurality of holding frames that respectively hold the plurality of rotary cutting members 81 a to 81 d, and a position adjustment unit 67 provided on the side wall of the housing 101. With. The position adjusting unit 67 adjusts the positions of the plurality of rotary cutting members 81 a to 81 d by moving each of the plurality of rotary cutting members 81 a to 81 d in the radial direction of a circle centered on the axis of the covered electric wire 40.

  The housing 101 has openings on the upstream side and the downstream side of the processing line L1 and is formed in a rectangular cylinder having a rectangular cross section. The housing 101 is positioned on the floor surface on which the manufacturing apparatus 1001 is installed with respect to the processing line L1. The relationship is fixed. The direction connecting the respective openings of the housing 101 is a substantially horizontal direction along the processing line L1. The normal direction of each of the four side walls of the housing 101 is a vertical direction or a horizontal direction. The covered electric wire 40 passes through the inside of the housing 101 along the processing line L1. More specifically, the covered electric wire 40 is fed into the housing 101 from the opening on the upstream side of the housing 101, passes through the housing 101, and is drawn out to the outside from the opening on the downstream side toward the wire winding unit 37. Be transported.

  The position adjustment unit 67 includes a plurality of position adjustment mechanisms. Each position adjustment mechanism 65 included in the plurality of position adjustment mechanisms includes, for example, a drive mechanism such as a linear guide and a linear motor, or a feed screw and a feed screw drive motor. It is fixed to the side wall. And the position adjustment part 67 supports the holding frame 111 so that sliding is possible in the radial direction of the circle | round | yen centering on the axis | shaft of the covered electric wire 40. FIG.

  Specifically, each holding frame 111 that holds the rotary cutting members 81a and 81b is supported so as to be movable along the vertical direction, and each holding frame 111 that holds the rotary cutting members 81c and 81d is horizontally Is supported so as to be movable. The position adjustment unit 67 adjusts the position of each holding frame 111 with respect to the housing 101 with respect to the housing 101 by each position adjusting mechanism 65 in the radial direction of a circle centered on the axis of the covered electric wire 40, thereby The position of the rotary cutting members 81a to 81d is adjusted, that is, the position of each rotary shaft is adjusted. The position adjustment unit 67 performs the position adjustment prior to the cutting process by the cutting unit 91 in accordance with the control by the controller 57. During the cutting process, the positions of the rotary cutting members 81a to 81d are fixed by fixing the holding frames 111. That is, the position of each rotating shaft is fixed.

  Each holding frame 111 is centered on the axis of the covered electric wire 40 from the base member at each of the flat base member extending in the axial direction of the covered electric wire 40 and the upstream and downstream ends of the base member. It is comprised including a pair of wall member erected toward the covered electric wire 40 along the radial direction of the circle. The normal directions of the pair of wall members coincide with the axial direction of the covered electric wire 40. The upstream wall member of the pair of wall members is provided with a motor 61 that rotates the rotary cutting member around the rotation shaft 75 and a power transmission mechanism 63 that includes a gear, a chuck mechanism, and the like. The power transmission mechanism 63 removably holds the rotary shaft 75 of each rotary cutting member, and applies the rotational force of the motor 61 to the rotary shaft 75 so that the rotary cutting member rotates (rotates) around the rotary shaft 75. introduce.

  The downstream wall member of the pair of wall members is provided with a bearing portion of the rotating shaft 75. The holding frame 111 supports the rotary cutting member so that the relative positional relationship of the rotary shaft 75 with respect to the holding frame 111 does not fluctuate by supporting the rotary shaft 75 by the power transmission mechanism 63 and the bearing portion. The rotating shaft 75 is supported so that the axis of the covered electric wire 40 and the rotating shaft 75 are included in one plane. Further, as described above, the position adjusting unit 67 of the holding unit 121 does not adjust the position of each rotary cutting member when the cutting unit 91 cuts the bumps 27 of the covered electric wire 40. Accordingly, the holding unit 121 causes the cutting unit 91 to be fixed such that the positions of the rotation axes of the plurality of rotary cutting members 81a to 81d are fixed with respect to the processing line L1 when the cutting unit 91 performs the cutting process. Hold.

  In order to suppress derailment (disconnection) from the covered electric wire 40 (41) from the groove of the conveyance roller provided in the processing line L1 due to the bump 27, the cut bump is Any shape and size may be used as long as the covered electric wire 40 is not deviated from a conveying roller or the like that performs path regulation along the processing line L1. Therefore, the cross-sectional shape of the covered electric wire 41 at the portion where the bumps are cut is not necessarily circular. Also, the size of the cross section need not be the same as the cross sectional size of the portion where no bump is formed.

  When the positions of the rotation axes of the plurality of rotary cutting members are fixed with respect to the processing line L1, the cross-sectional shape of the portion where the bumps are cut by the plurality of rotary cutting members that rotate about the rotation axis is circular. However, as described above, the cross-sectional shape is not necessarily circular. Therefore, even if the position of each rotating shaft of the plurality of rotating cutting members is fixed with respect to the processing line L1, the usefulness of the present invention is not impaired.

  The plurality of rotary cutting members 81 a to 81 d held by the holding part 121 are different from each other in the circumferential direction R1 (see FIG. 3) around the axis of the covered electric wire 40. The plurality of rotary cutting members 81a to 81d are arranged so that the rotary cutting members adjacent to each other along the circumferential direction R1 do not overlap with each other in the axial direction S1 of the covered electric wire 40 when viewed from the axial direction S1 of the covered electric wire 40. Is provided.

  Specifically, the plurality of rotary cutting members 81a to 81d are configured to include two pairs of rotary cutting members. Each of the two pairs of rotating cutting members cuts the bumps 27 formed on the covered electric wire 40 from the directions facing each other with the covered electric wire 40 interposed therebetween. Of the two pairs of rotary cutting members, one pair and the other pair are provided at positions shifted from each other along the processing line L1 direction (the axial direction S1 of the covered electric wire 40). The front end portion (downstream end portion) of one pair of rotary cutting members 81a and 81b provided on the upstream side is the rear end portion (upstream side) of the other pair of rotary cutting members 81c and 81d provided on the downstream side. It is located on the upstream side of the side end). The opposing direction of the one pair of rotary cutting members 81a and 81b and the opposing direction of the other pair of rotary cutting members 81c and 81d are substantially orthogonal to each other. With such an arrangement of the plurality of rotary cutting members 81a to 81d, the cross-sectional shape of the portion of the covered electric wire 41 where the bumps 27 are cut can be made closer to a circle.

  In addition, each of the plurality of rotary cutting members 81a to 81d held by the holding portion 121 includes the rotation shaft 75 and the axis of the covered electric wire 40 in substantially the same plane, and the rotation of the covered electric wire 40 and the rotary cutting member. The space between them gradually becomes narrower toward the downstream side of the processing line L1.

  The vibration suppression unit 181 is in contact with the covered electric wire 41 having the edge 27 cut by the cutting portion 91 on the downstream side of the processing line L1, so that the covered electric wire 40 (41) of the covered electric wire 40 (41) is cut. Suppresses vibration. The vibration suppression unit 181 includes a pair of suppression units 171a and 171b, and includes a pair of suppression units 171c and 171d on the downstream side thereof. As each holding | suppressing part, the roller etc. in which the groove | channel slightly wider than the diameter of the covered electric wire 41 was provided in the outer peripheral surface are employ | adopted, for example. The roller is configured to be able to rotate about its axis of symmetry by a frictional force with the covered electric wire 41 in contact therewith.

  A pair of holding | suppressing part 171a and 171b is each contact | abutted to the covered electric wire 41 so that the covered electric wire 41 may be pinched | interposed along a perpendicular direction, and is holding the covered electric wire 41 in the direction which mutually opposes along a perpendicular direction. Thereby, the vibration of the covered electric wire 40 (41) along the vertical direction is suppressed. Further, the pair of holding portions 171c and 171d abut against the covered wire 41 so as to sandwich the covered wire 41 along the horizontal direction, and hold down the covered wire 41 in a direction facing each other along the horizontal direction. Thereby, the vibration of the covered electric wire 40 (41) along the horizontal direction is suppressed.

  The vibration suppressing unit 181 preferably includes at least a pair of suppressing units. By providing the bump cutting device 54 with the vibration suppressing unit 181, the vibration of the covered electric wire when the bump 27 is cut is suppressed, and the cutting of the bump 27 is performed with higher accuracy. However, even if the bump cutting device 54 does not include the vibration suppressing portion 181, the bump 27 formed on the covered electric wire 40 can be cut to prevent the covered electric wire 40 (41) from coming off the processing line L 1. Therefore, even if the bump cutting device 54 does not include the vibration suppressing unit 181, the usefulness of the present invention is not impaired. In addition, for example, the manufacturing apparatus 1001 may further include a suction device that sucks resin scraps obtained by cutting a bump formed on the covered electric wire by a bump cutting device.

  Hereinafter, the bump cutting device 55 will be described. The bump cutting device 55 suppresses vibration of the covered electric wire by contacting the covered electric wire on the downstream side of the cutting portion 92 that holds the cutting portion 92, the holding portion 122 that holds the cutting portion 92, and the cutting portion 91. The vibration suppression unit 181 is mainly provided (see FIG. 7).

  The difference in configuration between the bump cutting device 55 and the bump cutting device 54 is that the bump cutting device 55 includes a holding portion 122 instead of the holding portion 121 and a cutting portion 92 instead of the cutting portion 91. The holding part 122 is cut so that the bump 27 formed on the covering of the covered electric wire 40 conveyed along the processing line L1 enters the cutting region of the cutting part 92 that performs the cutting process and is cut. The part 92 is held.

  The difference between the holding unit 122 and the holding unit 121 is that the holding unit 122 of the bump cutting device 55 includes a holding frame 112 instead of the holding frame 111. Moreover, the difference between the cutting part 92 and the cutting part 91 is that the cutting part 92 includes a plurality of rotary cutting members 82a to 82d instead of the plurality of rotary cutting members 81a to 81d. Hereinafter, a configuration different from the bump cutting device 54 among the configurations of the bump cutting device 55 will be described, and components having the same configuration and function as the bump cutting device 54 are denoted by the same reference numerals and description thereof will be omitted.

  The cutting unit 92 performs a cutting process for cutting the bumps 27 of the covered electric wire 40 being conveyed along the processing line L1. The cutting part 92 includes a plurality of (four) rotating cutting members 82a to 82d that rotate around a rotation axis. The rotary cutting member 82a is a conical cutter in which a spiral cutting blade 74 is provided on the outer periphery of the cone 73 (see FIG. 9). The rotary cutting member 82 a is provided with a rotary shaft 75 that passes through the symmetry axis (center axis) of the cone 73. The rotary cutting member 82 a is attached to the holding unit 122, and rotates about the rotation shaft 75 by the rotation of the motor 61 and performs a cutting process with the cutting blade 74. The rotary cutting members 82b to 82d also have the same configuration and size as the rotary cutting member 82a.

  The holding unit 122 includes a holding frame 112. The difference between the holding frame 112 and the holding frame 111 is that the length of the pair of wall members erected from the base member is different between the holding frame 112 and the holding frame 111. This difference is caused by a difference in configuration between the rotary cutting member 81a of the cutting unit 91 and the rotary cutting member 82a of the cutting unit 92.

  More specifically, the holding unit 122 positions the plurality of rotary cutting members 82a to 82d so that the respective rotation axes of the plurality of rotary cutting members 82a to 82d are parallel to the axial direction S1 of the covered electric wire 40. . Thereby, the rotating shaft of each rotary cutting member can be supported in a direction parallel to the axial direction S1 of the covered electric wire 40, that is, in a direction perpendicular to the pair of wall members erected on the holding frame 112. . Thereby, holding mechanisms, such as the rotary cutting member 82a in the holding frame 112, can be simplified.

  In addition, each of the plurality of rotary cutting members 82a to 82d held by the holding portion 122 includes the rotary shaft 75 and the axis of the covered electric wire 40 in substantially the same plane, and the rotation of the covered electric wire 40 and the rotary cutting member. The space between them gradually becomes narrower toward the downstream side of the processing line L1. Accordingly, the bump cutting device 55 can cut bumps of various sizes while suppressing the occurrence of a collision between the bump and the rotary cutting member, similarly to the bump cutting device 54 including the rotary cutting members 81a to 81d. .

  In FIG. 10, the cutting regions 203 of the rotary cutting members 82 a to 82 d of the cutting portion 92 held by the holding portion 122 when viewed from the axial direction of the covered electric wire 40 are shown in an overlapping manner. The illustrated cutting region 203 is a region in which the most downstream portion of each of the rotary cutting members 82a to 82d can cut the object. For each of the rotary cutting members 82 a to 82 d, the cutting region 203 is a portion between the rotation locus 201 of the cutting edge portion on the most downstream side of the cutting blade 74 and the rotation locus 202 of the root portion on the most downstream side of the cutting blade 74. It becomes. The overlapping region 204 is a region where a part of the cutting region 203 of the rotary cutting members adjacent to each other overlap each other when viewed from the axial direction of the covered electric wire 40. As with the rotary cutting members 82a to 82d, the rotary cutting members 81a to 81d of the bump cutting device 54 also have a cutting region between adjacent rotary cutting members when viewed from the axial direction of the covered electric wire 40. The parts overlap each other.

  As described above, when the cutting regions of the rotary cutting members adjacent to each other when viewed from the axial direction of the covered electric wire 40 overlap with each other when viewed from the axial direction, the cutting regions do not overlap. The cross-sectional size of the covered electric wire that has been cut can be further reduced. Accordingly, it is possible to further suppress the disconnection of the covered electric wire 40 (41) from the processing line.

  As described above, the bump cutting device 54 (55) cuts the bump formed on the covered electric wire 40 with a plurality of rotating cutting members fixed around the covered electric wire 40. However, for example, a bump cutting device that cuts the bump 27 by rotating one rotating cutting member while revolving around the covered electric wire 40 with a planetary gear or the like may be employed. That is, the bump cutting device only needs to include one or more rotary cutting members. Further, the rotary cutting member is not limited to one in which a cutting blade is spirally formed on the outer periphery of the rotating body like the rotary cutting member 81a. For example, a member in which a plurality of cutting blades are formed on the outer periphery of a disk is rotated. You may employ | adopt as a cutting member. Further, the bump cutting device 54 may include a cutting unit that cuts the bumps by a method that does not use a cutting blade such as laser cutting.

  It is formed in the covering among the covered electric wires conveyed along the processing line by any of the above-described bump cutting device, the bump cutting method, and the coated electric wire manufacturing method according to the present embodiment. Since the bump is cut, derailment of the covered wire from the processing line caused by the bump can be suppressed.

  In addition, according to the above-described cob cutting device for a covered electric wire according to the present embodiment, the plurality of rotary cutting members are different from each other in the circumferential direction around the axis of the covered electric wire (center axis). Of the outer periphery of the covered electric wire, the portion where the bumps can be cut becomes wider.

  Moreover, according to the above-described bump cutting device for a covered electric wire according to the present embodiment, the rotary cutting members adjacent to each other in the circumferential direction when viewed from the axial direction of the covered electric wire are in the axial direction of the covered electric wire. Since it arrange | positions in the position which does not mutually overlap, the contact of adjacent rotating cutting members can be suppressed.

  In addition, according to the above-described bump cutting apparatus for a covered electric wire according to the present embodiment, the respective rotational axes of the plurality of rotary cutting members are fixed at circumferential positions around the axis of the covered electric wire. Therefore, a mechanism for revolving the rotary cutting member becomes unnecessary, and the cutting portion can be reduced in size.

  Moreover, according to the above-described bump cutting device for a covered electric wire according to the present embodiment, a part of the cutting region between the rotary cutting members adjacent to each other when viewed from the axial direction of the covered electric wire is the axis of the covered electric wire. Since they overlap each other when viewed from the direction, the bumps remaining on the covered electric wire can be made smaller.

  Further, according to the above-described coated wire bump cutting apparatus according to the present embodiment, the space between the coated wire and the rotary cutting member gradually becomes narrower toward the downstream side of the processing line, so Various sizes of bumps can be cut while suppressing collision with the cutting member.

  Further, according to the above-described coated wire bump cutting apparatus according to the present embodiment, each of the plurality of rotary cutting members is moved in the radial direction of a circle centering on the axis of the coated electric wire, and thus the plurality of rotary cutting members. Therefore, it is possible to cut the bumps of the covered electric wires having various wire diameters.

  In addition, according to the above-described coated wire bump cutting apparatus according to the present embodiment, the vibration suppressing portion abuts on the covered wire on the downstream side of the cutting portion in the processing line. And since the bump of the covered electric wire which reached | attained the vibration suppression part is cut, the vibration suppression part can be closer to a covered electric wire, and can suppress the vibration of a covered electric wire more.

  Moreover, according to the above-described coated wire bump cutting apparatus according to the present embodiment, the vibration suppressing unit suppresses the covered electric wires in directions facing each other, and therefore can further suppress the vibration of the covered electric wires.

  Further, according to the coated wire manufacturing apparatus according to the present embodiment as described above, the coated wire taken out from the extrusion coating device is cooled and solidified by the cooling unit, and is thus more easily cut. Since the cut of the bump is performed, the bump is cut more efficiently.

  Further, according to the method for manufacturing a covered electric wire according to the present embodiment as described above, after the bump formed in the covering of the covered electric wire that is covered in the covering step and is conveyed along the processing line is cut. The portion of the covered electric wire where the bumps are formed is removed. Therefore, it is possible to produce a covered electric wire in which the bump is cut while suppressing the deviation (derailment) of the covered electric wire from the treatment line caused by the bump. Furthermore, since the covered electric wire in which the portion where the bumps are formed is removed from the covered electric wire, the productivity of the covered electric wire can be increased.

  Further, according to the method for manufacturing a covered electric wire according to the present embodiment as described above, the outer diameter is measured before the covered electric wire is processed by the cutting process, and the measured outer diameter is the reference value. If it exceeds, the bump on the coated electric wire is cut. Therefore, the covered electric wire can be manufactured while reducing the cutting cost of the bump.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

1001, 1002 Manufacturing apparatus 121, 122 Holding part 171a-171d Suppression part 181 Vibration suppression part 20 Core wire 203 Cutting area 25 Covering 27 Cove 30, 31 Conveying mechanism 40, 41, 42 Covered electric wire 67 Position adjustment part 71 Cylindrical body 72, 74 Cutting blade 73 Cone 75 Rotating shaft 81a-81d, 81b-81d Rotating cutting member 91, 92 Cutting part L1, L2 Processing line R1 Circumferential direction S1 Axial direction

Claims (17)

A coated wire bump cutting device applied to a processing line of a manufacturing apparatus for producing a coated electric wire by extruding and coating an insulator on the outer periphery of the core wire while conveying the core wire along the processing line,
A cutting unit that performs a cutting process of cutting the bumps of the covered electric wire being conveyed along the processing line;
A holding part for holding the cutting part;
An apparatus for cutting a coated electric wire. It is a lump cutting device of the covered electric wire according to claim 1,
The cutting part is
A bump cutting apparatus for a covered electric wire, comprising one or more rotary cutting members. It is a bump cutting device of the covered electric wire according to claim 2,
The rotary cutting member is a plurality of rotary cutting members,
The plurality of rotary cutting members are
An apparatus for cutting a coated electric wire, wherein the circumferential positions around the axis of the coated electric wire are different from each other. It is a bump cutting device of the covered electric wire according to claim 3,
Among the plurality of rotary cutting members, the rotary cutting members adjacent to each other in the circumferential direction when viewed from the axial direction of the covered electric wire are disposed at positions that do not overlap with each other in the axial direction of the covered electric wire. Cobb cutting device for coated wire. The apparatus for cutting a coated electric wire according to claim 3 or claim 4,
The holding part is
When the cutting part cuts the bump, the apparatus for cutting a coated electric wire has a cutting part for holding the cutting part so that the circumferential position of the rotation shaft of each of the plurality of rotating cutting members is fixed. It is a bump cutting device of the covered electric wire according to claim 4 or 5,
A part of a cutting region between the rotating cutting members adjacent to each other overlaps each other when viewed from the axial direction of the covered electric wire. The apparatus for cutting a coated electric wire according to any one of claims 2 to 6,
Each of the one or more rotary cutting members is
An apparatus for cutting a coated electric wire, wherein the space between the coated electric wire and the rotary cutting member is arranged so as to gradually become narrower toward the downstream side of the processing line. The apparatus for cutting a coated electric wire according to any one of claims 2 to 7,
The holding part is
Cobb cutting of a covered electric wire further comprising a position adjusting unit that adjusts the position of the plurality of rotary cutting members by moving each of the one or more rotary cutting members in a radial direction of a circle centered on the axis of the covered electric wire. apparatus. The apparatus for cutting a coated electric wire according to any one of claims 2 to 8,
The one or more rotary cutting members are:
An apparatus for cutting a coated electric wire including a cylindrical cutter in which a spiral cutting blade is provided on the outer periphery of a cylindrical body. The apparatus for cutting a coated electric wire according to any one of claims 2 to 8,
The one or more rotary cutting members are:
A coated wire cutting apparatus including a conical cutter provided with a spiral cutting blade on an outer periphery of a cone. The apparatus for cutting a coated electric wire according to any one of claims 1 to 10,
A vibration suppressing portion that suppresses vibration of the covered electric wire by contacting the covered electric wire on the downstream side of the cutting portion in the processing line;
A bump cutting device for a covered electric wire, further comprising: It is a lump cutting device of the covered electric wire according to claim 11,
The vibration suppressing unit is
An apparatus for cutting a coated electric wire with at least a pair of holding parts for holding the covered electric wire in a direction facing each other. A device for manufacturing a covered electric wire, comprising the apparatus for cutting a coated electric wire according to any one of claims 1 to 12,
A transport mechanism for transporting the core wire along the processing line;
An extrusion coating apparatus for extrusion coating the insulator on the outer periphery of the core wire;
And further comprising
An apparatus for manufacturing a covered electric wire, wherein the bump cutting device is provided on the downstream side of the extrusion coating device in the processing line. It is a manufacturing apparatus of the covered electric wire according to claim 13,
The said process line WHEREIN: The manufacturing apparatus of a covered electric wire further provided with the cooling part which cools the covered electric wire carried out from the said extrusion coating apparatus between the said extrusion coating apparatus and the said bump cutting apparatus. A process of transporting a coated electric wire whose insulator is extrusion coated on the outer periphery of the core wire along the processing line;
Cutting the bump formed on the sheath of the covered electric wire being conveyed along the processing line;
A method of cutting a coated electric wire with a bump. A transport process for transporting the core wire along the processing line;
In parallel with the conveying step, a covering step of manufacturing a covered electric wire by extruding an insulator on the outer periphery of the core wire,
In parallel with the transporting step and the covering step, a cutting step of cutting a bump formed on the covering of the covered electric wire that is covered in the covering step and is conveyed along the processing line,
A removal step of removing a portion where the bump was formed in the covered electric wire from which the bump was cut in the cutting step;
A method for manufacturing a covered electric wire. It is a manufacturing method of the covered electric wire according to claim 16,
A measuring step of measuring an outer diameter of the covered electric wire before the covered electric wire covered in the covering step is processed by the cutting step;
Further comprising
The cutting process includes
A method of manufacturing a covered electric wire, which is a step of cutting the bump when the outer diameter measured in the measuring step exceeds a reference value.

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