JP2005297058A - Coiling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate deficiency of a coil coiled in accordance with the change of coiling tension caused by the variation in the coiling speed of wire rod fed with fixed coiling tension at the time of coiling the wire rod round a coiling core axis. <P>SOLUTION: The coiling device is composed of: a wire rod feeding part for feeding wire rod from a bobbin; a tension mechanism part for applying fixed coiling tension to the wire rod fed from the bobbin; a coiling part for coiling the wire rod with the fixed coiling tension applied round a coiling core axis rotating at a fixed speed; and a tension variation relaxation mechanism for relaxing the variation in the coiling tension of the wire rod at coiling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a winding device for winding a coil.

  Conventionally, as a winding device that obtains an edgewise coil by winding a flat wire in the width direction, a fixed piece is attached to a circular core shaft that is rotationally driven by a motor so as to rotate integrally with the winding core. A presser piece that slides in the axial direction by a slide drive mechanism is provided on the shaft, and the flat wire that is sent with a certain tension applied by sandwiching the flat wire between the plates is fixed in the axial direction by the presser piece. A flat wire is wound around the core shaft between the fixed piece and the presser piece while applying pressure (see, for example, Patent Document 1).

  Japanese Patent Laying-Open No. 2001-71078 (see configuration in FIG. 2)

  In the winding device having such a structure, there is a problem in that an edgewise coil having a circular cross section is obtained by winding a rectangular wire fed with a constant tension around a winding core shaft rotating at a constant speed. However, as shown in FIG. 8, when trying to obtain an elliptical edgewise coil having a short diameter a and a long diameter b, the difference between the short diameter a and the long diameter b is large. The difference will change the winding speed of the flat wire.

  Also, when a rectangular wire is pulled out from the bobbin in the wire rod supply unit and supplied to the winding device, the bobbin has a large moment of inertia, and if the winding speed of the rectangular wire on the winding side fluctuates, it cannot catch up with the fluctuation, If the part where the wire is loose is pulled suddenly, it appears as a difference in tension, and the tension balance between the supply side and the winding side of the flat wire is lost. When the balance is lost, the winding of the coil is disturbed, and the tight winding collapses. The balance of the tension depends on the rotational speed on the winding side, and if the rotational speed is lowered to prevent the coil from collapsing, the working efficiency is deteriorated.

  The problem to be solved is that, when a coil (edgewise coil) is obtained by winding a wire (flat wire) sent with a constant tension around a core shaft rotating at a constant speed, the cross section is long and short When trying to wind an oval coil consisting of a and long diameter b, the winding speed of the wire changes, the balance of tension with the wire supply side is lost, and the quality of the wound coil deteriorates. It is to end.

  The present invention relates to a winding device in which a wire rod is wound around a core shaft that rotates at a constant speed after a constant winding tension is applied to a wire rod supplied from a bobbin in a wire rod supply portion. In particular, even when the winding speed of the wire changes when winding an elliptical coil having a short diameter a and a long diameter b, the balance between the tension on the wire supply side and the winding side is lost. In order to prevent this, a tension fluctuation mitigation mechanism for mitigating fluctuations in the winding tension of the wire during coil winding is provided.

  According to the present invention, when winding a coil having an oval cross section, even if the winding speed of the wire is fluctuated and the wire supplied from the bobbin is loosened or suddenly pulled, the winding tension fluctuates accordingly. Is absorbed by the tension fluctuation mitigating mechanism, so that the wire rod can be wound around the core shaft with a constant tension at all times, and a coil with good quality without being collapsed can be obtained.

  FIG. 1 shows an example of a configuration of a winding device according to the present invention in which an edgewise coil having a circular cross section is wound.

  In this case, the winding device pulls the rectangular wire 10 wound around the bobbin 22 supported so as to be able to rotate on the winding device main body 20 installed on the gantry 1 and the support member 21 on the fixed side to a predetermined tension. It consists of a wire rod supply section 23 that feeds out with force and supplies it to the winding apparatus body 20 and a tension fluctuation relaxation mechanism section 24 that reduces fluctuations in winding tension when winding the rectangular wire in the winding apparatus body 20.

  As shown in FIG. 2, the winding device main body 20 is screwed to a rotating shaft 3 that is rotatably disposed in a vertical direction by a bearing 2 screwed to the upper portion of the gantry 1 and a lower portion of the gantry 1. The coupling 5 that connects the pulse motor 4, the rotating shaft 3 and the rotating shaft 41 of the pulse motor 4, and the holes 61 and 62 that are formed at intervals in the axial direction of the rotating shaft 3 (FIG. 3). (See FIG. 4). Two core shafts 71 and 72 which are loosely inserted from above, respectively, and a weight 9 which is detachably mounted on top of the pair of core shafts 71 and 72 by a set screw 8 (see FIG. 4). And is composed of.

  Further, the upper end surface of the rotating shaft is used as a coil receiving surface, and a receiving table 11 is disposed so that the receiving surface of the flat wire 10 is positioned at a level with the coil receiving surface. Tension mechanism portion 14 attached to be able to move up and down by means of a flat wire 10 supply system, and the flat wire 10 is sandwiched between the cradle 11 and the weight 12 in the thickness direction, and tension during winding It is trying to produce.

  The cradle 11 in the tension mechanism unit 14 is rotatably mounted by a bearing 15 screwed onto the gantry 1 so that the tensioned rectangular wire 10 can be smoothly fed out.

  Further, a pressing member 16 is provided in the vicinity of the upper end surface of the rotating shaft 3 to restrain the flat wire 10 to the upper end surface of the rotating shaft so as to suppress pulsation in the thickness direction of the flat wire 10 that is sent. Yes.

  As the tension fluctuation mitigating mechanism 24, a moving pulley 27 is provided by the wire 10 that is provided between the wire supply unit 23 and the winding device main body 20 and is fed from the bobbin 22 through a pair of rollers 25 and 26 provided on the fixed side. It has a structure to suspend. Then, one end of the chain 29 is attached to the mounting member 28 of the movable pulley 27, the other end of the chain 29 is freely placed on the floor surface 30, and the chain 29 is pulled by a tensile force acting on the flat wire 10 when the coil is wound. At the same time, the moving pulley 27 rises, and when the torque due to the weight of the chain 29 and the moving pulley 27 reaches the torque for rotating the bobbin 22, the rectangular wire 10 is sent out.

  In the winding device configured as described above, the winding device is in the winding device main body 20 and is pressed by the pressing member 16 and is sent in the lateral direction along the coil receiving surface (upper end surface) of the rotating shaft 3. The starting end of the wire 10 is temporarily attached to a screw 19 provided on the side surface of the weight 9, and then the rectangular wire 10 is placed between the coil receiving surface of the rotary shaft 3 and the weight 9 by the weight of the weight 9. When the rotary shaft 3 is rotated at a constant speed after being held between the two, the tension mechanism unit 14 applies a constant winding tension while pushing up the core shafts 71 and 72 together with the weight 9 according to the rotation. In this state, the rectangular wire 10 is wound around the pair of core shafts 71 and 72.

  In this case, as shown in FIG. 7, when winding the edgewise coil 17 having an elliptical cross section, the winding speed of the rectangular wire 10 changes due to the difference between the major axis and the minor axis, and the tension varies. However, according to the fluctuation, the moving pulley 27 in the tension fluctuation reducing mechanism unit 24 is appropriately raised and lowered together with the chain 29 to absorb and relax the fluctuation of the tension, and depends on the weight of the chain 29 and the moving pulley 27. The torque is always held so as to be a torque for rotating the bobbin 22.

  In this way, even if the rotational speed of the rotary shaft 3 is increased, the length of the chain 29 suspended by the upper and lower movements of the movable pulley 27 suspended on the flat wire 10 changes, and the flat angle depends on the weight at that time. The fluctuation of the tension in which the wire 10 is pulled or loosened is absorbed and relaxed with good responsiveness, and the edgewise coil 17 having an elliptical cross section can be wound with a constant winding tension.

  Further, the structure of the winding device main body 20 is such that the supplied flat wire 10 is sandwiched between the coil receiving surface and the flat wire previously wound around the core shafts 71 and 72 to rotate the rotating shaft 3. Accordingly, while pushing up the core shafts 71 and 72 together with the weight 9, the coil is pressed with its own weight and wound with good adhesion. There is a possibility that the winding of the coil may be disrupted due to disturbance in winding of the coil without being successfully sandwiched between the coil receiving surface 10 and the flat wire wound on the core shafts 71 and 72 previously.

  Therefore, in the present invention, as shown in FIG. 1, a mechanism unit 31 is provided for tilting the core shafts 71 and 72 together with the weight 9 in the direction opposite to the supply side of the flat wire 10.

  Here, a piston / cylinder mechanism 33 that moves the magnet 32 forward and backward is adopted as the tilting mechanism portion 31 so that the magnet 32 is attracted to the weight 9 and pulled.

  As shown in FIG. 5, by tilting the core shafts 71 and 72 so that a gap s is formed on the supply side of the flat wire 10 when the coil is wound by the tilt mechanism portion 31, the supplied flat wire 10 is It becomes easy to be drawn into the gap s, and the coil can be wound up without collapsing the tight winding.

  At that time, the coil is effectively pressed by the dead weight of the weight 9 without a gap on the inclined side of the core shafts 71 and 72, and can be wound with good adhesion.

  When the desired edgewise coil 17 is obtained by winding a predetermined number of the rectangular wires 10, the pair of core shafts 71 and 72 around which the edgewise coil 17 is wound are placed above the rotating shaft 3 together with the weight 9. Pull out. Then, the edgewise coil 17 is heat-sealed by setting it in the heat-sealing apparatus of the next process in that state (see FIG. 9).

  At that time, in the present invention, in particular, a heat insulating member 34 is provided in the lower portion of the weight 9 so that heat is not transmitted to the weight 9.

  FIG. 9 shows a heat welding apparatus for the edgewise coil 17. Here, the edgewise coil 17 wound around the pair of core shafts is set on the jig 35 together with the weight 9, and then the AC is applied to the edgewise coil 17 for a predetermined time by the power source 37, the voltage controller and the timer 38. A voltage or a DC voltage is applied, and Joule heat generated by a current flowing in the coil at that time is used to melt the coating and weld the coil wires together. In the figure, 36 is a heat insulating member provided on the jig 35 side.

  After the fusion, as shown in FIG. 6, the edgewise coils 17 are wound around the pair of core shafts 71 and 72 to which the weight 9 is attached, and the core shafts 71 and 72 can be freely moved. The edgewise coil 17 can be easily pulled out by applying an external force F from both sides to the end portion and bending it in the opposite direction to create a gap between the core shafts 71 and 72 and the edgewise coil 17. It becomes like this.

  In the above embodiments, the case where the edgewise coil is wound using a rectangular wire has been described. However, the present invention can be similarly applied to the case where a normal coil is wound using a wire having a circular cross section. .

  According to the present invention, a winding device that winds a wire around a core shaft that rotates at a constant speed after applying a constant winding tension in the tension mechanism to the wire supplied from the bobbin in the wire supply unit. Therefore, when winding a coil having an oval cross section, it is possible to always wind the wire around the core shaft with a constant winding tension and good adhesion without being affected by fluctuations in the winding speed of the wire. This makes it possible to obtain a coil with good quality that does not collapse.

It is a front view which shows one Example of the winding apparatus by this invention. It is a front sectional view showing the detailed structure of the winding device body in the same embodiment. It is a top view which shows the two hole parts drilled at intervals in the axial direction of the rotating shaft in the Example. It is a side view which shows the part by which the weight was attached to the upper part of a pair of core shaft around which the edgewise coil in the Example is wound. It is a partial front sectional view showing a state in which the winding core shaft is inclined so that a gap is formed on the flat wire supply side when the coil is wound by the inclination mechanism. It is a front sectional view showing a state when an edgewise coil wound around a pair of winding core shafts is extracted. It is a perspective view which shows the edgewise coil wound by the winding apparatus of this invention. It is a side view which shows the edgewise coil of a cross-sectional ellipse shape. It is a simplified block diagram which shows the heating welding apparatus of an edgewise coil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 3 Rotating shaft 71 Core shaft 72 Core shaft 9 Weight 10 Flat wire 14 Tension mechanism part 20 Winding device main body 22 Bobbin 23 Wire rod supply part 24 Tension fluctuation relaxation mechanism part 27 Dynamic pulley 29 Chain 31 Inclination mechanism part 34 Thermal insulation member

Claims (7)

  A wire rod supply unit for supplying a wire rod from a bobbin, a tension mechanism unit for applying a constant winding tension to the wire rod supplied from the bobbin, and a wire rod having a constant winding tension applied to a core shaft rotating at a constant speed. A winding device comprising a coil winding section that winds and a tension fluctuation relaxation mechanism that relaxes fluctuations in the winding tension of the wire during coil winding.   The winding device according to claim 1, wherein a cross section of the coil wound around the core shaft is an ellipse having a major axis and a minor axis.   The winding device according to claim 2, wherein the coil wound around the core shaft is an edgewise coil using a flat wire as a wire.   2. The winding device according to claim 1, wherein the tension fluctuation relaxation mechanism has a structure in which the moving pulley is suspended by a wire supplied from a bobbin.   One end of the chain is attached to the moving pulley side, the other end of the chain is freely placed on the floor, and the moving pulley rises together with the chain due to the tensile force acting on the wire when the coil is wound. 5. The winding device according to claim 4, wherein when the torque due to the weight of the pulley reaches the torque for rotating the bobbin, the wire rod is sent out from the bobbin.   A coil winding portion is a vertically arranged rotating shaft that rotates with a motor as a drive source, a core shaft loosely fitted from above into a hole drilled in the axial direction of the rotating shaft, and the core shaft And a mechanism that tilts the core shaft in the direction opposite to the wire supply side, and a constant winding tension is applied from the lateral direction along the upper end surface of the rotating shaft. While the supplied wire is sandwiched between the upper end surface of the rotating shaft and the weight attached to the upper portion of the core shaft, the core shaft is pushed upward together with the weight by rotating the rotating shaft. When winding a wire around the core shaft, the winding is characterized in that the core shaft is inclined so that a gap is formed between the previously wound wire and the upper end surface of the rotary shaft. apparatus.   The winding device according to claim 6, wherein a heat insulating member is provided on a lower portion of the weight.

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