Winding device, winding method using the same, and method for manufacturing a connected coil

Abstract

To wind adhesive tape entirely around a wire material without leaving any unused part.SOLUTION: In a taping machine which has multiple dies 51-54 with insertion holes 51a-54a through which a wire material 11 moving in the length direction passes, and sends an adhesive tape 19 through the insertion holes together with the wire material and adheres it to the wire material, the multiple dies are each formed with a notch 51b-54b that allows side parts 19a, 19b of the adhesive tape adhered to the wire material to enter, and the multiple dies are connected so that the insertion holes are continuous and the notches are not aligned in the circumferential direction of the insertion holes. The insertion holes of the multiple dies are each formed so that the diameter narrows toward the moving direction of the wire material, and the notches are formed so that the cross sections transverse to the moving direction of the wire material have the same shape. The machine is provided with a holder 56 with a round hole 56c formed therein for accommodating the multiple dies in a stacked state, and fixing means 57 for fixing the multiple dies to the holder.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a taping machine and a taping method for attaching an adhesive tape that is attached longitudinally to a wire to the outer periphery of the wire. [Background technology]

[0002] Conventionally, for example, in the stator of a motor (electric motor), multiple split cores around which coils are wound are arranged in a ring shape, and wires extending from each coil are connected to form jumper wires. Therefore, when forming the jumper wires for the windings of these multiple split cores, insulating adhesive tape is applied to the wires that will become the jumper wires in order to protect the jumper wires and ensure their insulation, and a taping machine for applying the tape has been proposed (see, for example, Patent Document 1).

[0003] This taping machine is equipped with a taping table on which the back of the adhesive tape is placed, a tape suction port that introduces negative pressure to the taping table, a tape pull-in groove that opens into the taping table, and a chuck mechanism that clamps the adhesive tape.The back of the adhesive tape is adsorbed to the taping table by negative pressure, a wire is drawn into the tape pull-in groove together with the adhesive tape, the wire is clamped by the chuck mechanism, and the adhesive surfaces on both sides of the adhesive tape that is applied vertically to the wire are bonded together. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-58857 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the adhesive surfaces on both sides of an adhesive tape that is applied vertically to a wire are glued together, both sides of the glued adhesive tape do not protect the wire, but become excess areas that are difficult to handle, and this remains a problem that needs to be solved.

[0006] The object of the present invention has been made in consideration of such problems, and is to provide a taping machine and a taping method in which the entire adhesive tape applied vertically to a wire is wrapped around the wire, eliminating the generation of excess tape. [Means for solving the problem]

[0007] The present invention is an improvement to a taping machine that has a plurality of dies with insertion holes through which a wire moving in the longitudinal direction passes, and in which adhesive tape that is attached longitudinally to the wire along the longitudinal direction is passed through the insertion holes together with the wire to affix it to the wire.

[0008] Its characteristic configuration is that each of the multiple dies has a notch formed therein which opens the insertion hole and allows the side of the adhesive tape attached to the wire to enter, and the multiple dies are connected so that the insertion holes are continuous and the notches are shifted circumferentially around the insertion hole.

[0009] In this case, it is preferable that each of the insertion holes of the multiple dies has a circular cross section and is formed so that its diameter narrows toward the direction of movement of the wire, and that the notches that open the insertion holes are formed so that their cross sections that cross the direction of movement of the wire have the same shape so that the width of the intersection with the insertion hole narrows toward the direction of movement of the wire.

[0010] In addition, when the multiple dies are each a thick-walled circular plate with approximately the same outer diameter and an insertion hole is formed in the center, it is preferable to have a holder with a round hole formed in it to accommodate the multiple dies in a stacked state so that the insertion holes are continuous, and a fixing means for fixing the multiple dies accommodated in the round hole to the holder.

[0011] Furthermore, a concave groove extending in the direction in which the wire passes through is formed on the inner circumference of the round hole, and an opposing groove is formed around the die which faces the concave groove when accommodated in the round hole and forms a through hole together with the concave groove, and a pin can be provided which is inserted into the through hole formed by the concave groove and the opposing groove to prevent the die from rotating relative to the round hole.

[0012] In this case, it is preferable that a plurality of recessed grooves each having a semicircular cross section are formed at an equal angle relative to the central axis of the round hole, and specifically, it is preferable that six recessed grooves are formed at 60° intervals relative to the central axis of the round hole. It is further preferable that the recessed groove and the opposing groove facing the recessed groove are each formed in a semicircular cross section so that the cross section of the through hole is circular.

[0013] Another invention is a taping method in which a wire is passed sequentially in the lengthwise direction through insertion holes formed in a plurality of dies, and an adhesive tape attached longitudinally to the wire is passed through the insertion hole together with the wire to affix it to the wire.

[0014] Its distinctive features are that it comprises a tape attachment step in which the tape is attached longitudinally to the wire so that both sides of the tape rise up along both sides of the wire; a first attachment step in which the wire is passed through an upstream die so that one side of the tape attached longitudinally to the wire is attached to the outer periphery of the wire; and a second attachment step in which the wire that has passed through the upstream die is passed through a downstream die so that the other side of the tape attached longitudinally to the wire is overlapped on top of the one side attached to the outer periphery of the wire.

[0015] Furthermore, when, in the tape attachment step, the adhesive tape is attached vertically to the wire so that the rise height of one side is lower than the rise height of the other side, it is preferred that the first attachment step is performed by passing the adhesive tape together with the wire through the insertion hole of a single die, and that the second attachment step is performed by passing the adhesive tape together with the wire successively through the insertion holes of multiple subsequent dies. Effect of the Invention

[0016] The taping machine of the present invention is equipped with a plurality of dies with notches formed to open the insertion holes, and the notches are connected so as to be shifted in the circumferential direction, so that by passing the wire with the tape attached so that both sides rise up along both sides of the wire through the dies in sequence, the entire adhesive tape is wrapped around the wire and attached, so that no excess portion of the adhesive tape is generated.

[0017] Furthermore, when the adhesive tape is attached vertically to the wire so that the rise height of one side is lower than the rise height of the other side, it is possible to align the one side with the lower rise height with the adhesive tape by passing it through the insertion hole of a single die.By limiting the number of dies, the taping machine of the present invention is prevented from becoming large, and it can be installed even on conventional winding machines which have limited installation space.

[0018] In addition, the degree to which the adhesive tape applied vertically to the wire is wrapped around the wire will vary depending on the degree of circumferential shift of the multiple dies. However, if a fixing means is provided for fixing the multiple dies contained in the holder to the holder, then the dies can be fixed to the holder by the fixing means after fine adjustment, making it possible to fine-tune the degree of shift of the multiple dies. [Brief description of the drawings]

[0019] [Figure 1] 1 is an exploded perspective view showing a taping machine according to an embodiment of the present invention; [Diagram 2] 12 is a cross-sectional view taken along line EE in FIG. 11, showing the connected state of the plurality of dies. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2 showing the leading die. [Figure 4] 3 is a cross-sectional view taken along line BB in FIG. 2 showing the second die. [Diagram 5] 3 is a cross-sectional view taken along line CC in FIG. 2 showing the third die. [Figure 6] FIG. 3 is a cross-sectional view taken along line DD in FIG. 2, showing the fourth die. [Figure 7]12 is a cross-sectional view taken along the line FF in FIG. 11, showing a state in which an adhesive tape is attached to the wire. [Figure 8] 10 is a top view showing the state in which the adhesive tape is mounted on a taping table. FIG. [Figure 9] 1 is a diagram showing a linked coil obtained by the winding device. [Figure 10] FIG. [Figure 11] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Next, the best mode for carrying out the present invention will be described with reference to the drawings.

[0021] 10 and 11 show a winding device 10 equipped with a taping machine 50 according to the present invention. In the figures, three mutually orthogonal axes, X, Y, and Z, are set, and the winding device 10 will be described assuming that the X axis extends in the horizontal front-rear direction, the Y axis extends in the horizontal lateral direction, and the Z axis extends in the vertical direction.

[0022] This winding device 10 includes a coil winding machine 12 that winds wire 11, which is supplied in the Y-axis direction from a wire supply source (not shown), around split cores 13. The coil winding machine 12 shown in the figure forms three-phase linked coils 9 (FIG. 9) that constitute, for example, a stator (multi-pole armature) of a three-phase AC motor, and includes a spindle 16 with a winding core 15 that holds three split cores 13 at its tip.

[0023] As shown in FIG. 10, this winding core 15 includes a main body 15a attached to the tip of a spindle 16, three protruding shafts 15b arranged parallel to the spindle 16 from the main body 15a, and holders 15c arranged at the tips of the protruding shafts 15b and holding the split cores 13.

[0024] In this coil winding machine 12, a retractable shaft 15b having a holder 15c for supporting a split core 13 around which the wire 11 is wound is protruded from a main body 15a, and when the spindle 16 rotates together with the main body 15a in this state, the wire 11 that has been unwound from a wire supply source and passed through a nozzle 14 is wound only around the split core 13 attached to the holder 15c at the tip of the protruding retractable shaft 15b.

[0025] 10 and 11, a pair of nozzles 14 for guiding the wire 11 are provided spaced apart on the same axis. Each of the pair of nozzles 14 is provided penetrating a mounting plate 17, and the mounting plate 17 on which the pair of nozzles 14 are provided is connected by a connecting plate 18. A nozzle moving mechanism (not shown) moves the connecting plate 18, so that the pair of nozzles 14 are attached movably in three axial directions while maintaining a state in which they are spaced apart on the same axis.

[0026] A tape application machine 20 is provided near the winding machine 12 for applying a predetermined length of adhesive tape 19 (FIG. 1) to the wire 11 that is supplied from a wire supply source and passes through a pair of nozzles 14. This tape application machine 20 includes a taping table 21 that adsorbs the predetermined length of adhesive tape 19, a table mover 22 that moves this taping table 21 between a tape mounting position and a tape application position, and a tape supplying machine 30 that supplies the adhesive tape 19 to the taping table 21 at the tape mounting position.

[0027] 1, the taping table 21 is formed with tape placement sections 21a and 21b on which the back surface of the adhesive tape 19 is placed, and a tape lead-in groove 21c that opens between the tape placement sections 21a and 21b. That is, the taping table 21 is formed in a rectangular shape when viewed from above, a shallow groove is formed on the upper surface of the taping table 21, and the tape placement sections 21a and 21b are formed as the bottom surfaces of the shallow groove.

[0028] A plurality of tape suction ports 21d are formed in each of the tape placement portions 21a and 21b. Although not shown, a vacuum tube communicating with a negative pressure source not shown is connected to the taping table 21, and this vacuum tube communicates with each tape suction port 21d, and the back surface of the adhesive tape 19 placed on the tape placement portions 21a and 21b is sucked by the negative pressure introduced to each tape suction port 21d, so that the adhesive tape 19 does not fall off from the tape placement portions 21a and 21b.

[0029] 7, this embodiment shows a case where the tape placement portions 21a, 21b are provided eccentrically on the taping stand 21. For this reason, the tape lead-in groove 21c of the taping stand 21 opens eccentrically between the planar tape placement portions 21a, 21b and is formed so as to be perpendicular to the tape placement portions 21a, 21b.

[0030] Therefore, this tape guide groove 21c has planar groove side surfaces 21ca, 21cb facing each other in parallel with an opening width T, and a groove bottom 21cc that connects each groove side surface 21ca, 21cb and curves into an arc-shaped cross section, and the opening width T is the sum of the outer diameter of the wire 11, the thickness of the adhesive tape 19, and a predetermined clearance.

[0031] Returning to Figures 10 and 11, the table mover 22 that moves the taping table 21 is equipped with a vertical actuator 23 (Figure 11) that moves the taping table 21 up and down in the vertical direction, and an X-axis actuator 24 that moves the vertical actuator 23 in the X-axis direction to move it between below the tape application position and the tape loading position.

[0032] The vertical actuator shown in FIG. 11 is a fluid pressure cylinder 23 with the retractable rod 23a on the upper side, and the X-axis actuator 24 includes a housing 24a attached and extending in the X-axis direction, a rotating shaft 24b consisting of a male screw attached and extending in the longitudinal direction inside the housing 24a, a movable body 24c that is screwed onto the rotating shaft 24b and can move along the housing 24a, and a drive source 24d that rotates the rotating shaft.

[0033] As the driving source 24d, for example, a servo motor capable of being controlled with high precision is used, and a case is shown in which a main body 23b of a fluid pressure cylinder 23, which is a vertical actuator, is attached to a movable body 24c that moves along the housing 24a.

[0034] Therefore, when the drive source 24d in the X-axis actuator 24 rotates the rotating shaft 24b, the movable body 24c screwed thereto is moved in the X-axis direction together with the vertical actuator 23 attached thereto, and the vertical actuator 23 is moved between the position below the tape attachment position and the tape mounting position.

[0035] On the other hand, the tape supplying machine 30 that supplies the adhesive tape 19 to the taping table 21 at the tape loading position includes a reel 31 on which the adhesive tape 19 is wound, a chuck 32 that grips the adhesive tape 19 extending from the reel 31, a drive cylinder 33 that moves the chuck 32, a cutter 34 that cuts the adhesive tape 19, and a moving machine (not shown) that moves the cutter 34.

[0036] In operation of the tape supplying machine 30, the chuck 32 pulls out the adhesive tape 19 from the reel 31 based on a command from a controller (not shown), and places the pulled-out adhesive tape 19 on the tape placement sections 21a, 21b of the taping table 21. Thereafter, the cutter 34 cuts the adhesive tape 19 at a predetermined position. This allows the cut piece of adhesive tape 19 to be adsorbed and held on the taping table 21.

[0037] The table mover 22, which moves the taping table 21, is configured to move the taping table 21 from a tape attachment position, where a predetermined length of adhesive tape 19 supplied from the tape supply machine 30 is placed on the tape mounting sections 21a, 21b, to a tape application position, where the adhesive tape 19 is affixed to the wire 11 as shown in Figure 1, and is configured to affix the adhesive tape 19 to the wire 11 by moving to the tape application position.

[0038] In this embodiment, as shown in FIG. 7, a tape lead-in groove 21c is formed in the taping base 21. Therefore, when the wire 11 is drawn into the tape lead-in groove 21c, the adhesive tape 19 is drawn into the tape lead-in groove 21c together with the wire 11. When the wire 11 enters the tape lead-in groove 21c, the adhesive tape 19 adsorbed and held by the taping base 21 is vertically attached to the wire 11, and both edges of the tape are raised along both sides of the wire 11.

[0039] In this embodiment, the tape guide groove 21c is opened eccentrically between the tape mounting portions 21a, 21b of the taping table 21, so that one side portion 19a of the adhesive tape 19 attached vertically to the wire 11 is configured to be lower than the other side portion 19b.

[0040] 1 and 2, the wire 11 to which a predetermined length of adhesive tape 19 (FIG. 1) has been applied by such a tape application machine 20 is then passed through a taping machine 50. The taping machine 50 in this embodiment includes a plurality of dies 51-54 each having an insertion hole 51a-54a through which the wire 11 moving in the length direction passes.

[0041] The multiple dies 51-54 are used to attach the adhesive tape 19, which is attached vertically to the wire 11 along its length (Y-axis direction), to the wire 11 by passing the adhesive tape 19 together with the wire 11 through each of the insertion holes 51a-54a of the multiple dies 51-54.In this embodiment, the multiple dies 51-54 are each a thick, circular plate having approximately the same outer diameter.

[0042] In this embodiment, each of the insertion holes 51a to 54a of the multiple dies 51 to 54 penetrates through its center, has a circular cross section, and is formed so that its diameter narrows toward the moving direction of the wire 11, and the minimum diameter of the insertion holes 51a to 54a at the downstream end is the sum of the outer diameter of the wire 11, the thickness of the adhesive tape 19, and a predetermined clearance.

[0043] This allows the adhesive tape 19 to be smoothly drawn into the insertion holes 51a to 54a of the multiple dies 51 to 54 together with the wire 11, and after passing through the downstream end portions thereof, the adhesive tape 19 is wound around the wire 11.

[0044] On the other hand, the multiple dies 51 to 54 have notches 51b to 54b formed therein, which open the insertion holes 51a to 54a to the periphery of the dies 51 to 54 and allow the side portions 19a, 19b of the adhesive tape 19 attached to the wire 11, rising from the wire 11, to enter.

[0045] As shown in the enlarged views of Figures 3 to 6, the notches 51b to 54b in each die 51 to 54 have two cutout surfaces 51ba to 54ba, 51bb to 54bb parallel to a plane including the central axes of the insertion holes 51a to 54a of the die 51 to 54, and are configured so that the insertion holes 51a to 54a are open between the two cutout surfaces 51ba to 54ba, 51bb to 54bb.

[0046] Here, the cutout surfaces 51ba-54ba, 51bb-54bb extending on both sides of the insertion holes 51a-54a are parallel to a plane including the central axes of the insertion holes 51a-54a of the dies 51-54, so that the cutouts 51b-54b have the same shape in cross section transverse to the movement direction of the wire 11, and when the insertion holes 51a-54a are conical, the width of the intersection line between the cutout surfaces and the insertion holes 51a-54a narrows toward the movement direction of the wire 11.

[0047] In the figure, the dies 51 to 54 are thick-walled, circular plates, and the example shows a first die 51 in which a notch 51b is formed so that the cross section where the two cutout surfaces 51ba, 51bb intersect at less than 180 degrees forms a fan shape, and the second to fourth dies 52 to 54 in which notches 52b to 54b are formed so that the two cutout surfaces 52ba, 52bb, 53ba, 53bb, 54ba, 54bb open at 180 degrees to form a flat surface.

[0048] In addition, since the insertion holes 51a to 54a are conical, cutout surfaces 51ba to 54ba, 51bb to 54bb are formed parallel to a plane including the central axes of the insertion holes 51a to 54a, and the cutout surfaces 51ba to 54ba, 51bb to 54bb are spaced apart from the central axis by slightly more than the minimum radius of the insertion holes 51a to 54a.

[0049] Here, if the cutout faces 51ba-54ba, 51bb-54bb are formed beyond the minimum radius of the insertion holes 51a-54a, the insertion holes 51a-54a and the cutout faces 51ba-54ba, 51bb-54bb do not intersect on the side where the inner diameter is smaller, but the inner circumference of the insertion holes 51a-54a forming a cone shape with the cutout faces 51ba-54ba, 51bb-54bb is rounded to be smoothly continuous, so that the dies 51-54 can pass through without damaging the wire 11 and the adhesive tape 19 attached thereto. The insertion holes 51a-54a are configured to be smoothly opened to the side of the dies 51-54 by the cutouts 51b-54b over their entire length.

[0050] 1 and 2, the taping machine 50 includes a holder 56 for accommodating a plurality of dies 51-54 in a stacked state so that the central through-holes 51a-54a are continuous. In FIG. 1, the holder 56 for accommodating the disk-shaped dies 51-54 has a shape in which a mounting portion 56b is formed on a tubular member 56a having an inner diameter slightly larger than the outer diameter of the dies 51-54, and the tubular member 56a has a round hole 56c for rotatably accommodating the disk-shaped dies 51-54. The holder 56 is attached to the connecting plate 18 via the mounting portion 56b so that the wire 11 passes through the continuous through-holes 51a-54a of the dies 51-54 (FIGS. 10 and 11).

[0051] When accommodated in the holder 56, the multiple dies 51-54 are connected such that the insertion holes 51a-54a are continuous and the notches 51b-54b are shifted in the circumferential direction. As shown in Figures 2-6, when the multiple dies 51-54 are inserted into the holder 56 so as to be stacked, the degree of shift in the circumferential direction is within a range in which both of the intersection lines of the insertion holes 51a-54a and the notches 51b-54b at the downstream end edge of the upstream die 51-53 are between the intersection lines at the upstream end edges of the downstream dies 52-54, so that the dies are connected in close contact with each other.

[0052] In the cylindrical member 56a, a long hole 56d is formed extending in the circumferential direction corresponding to the housed dies 51-54, and female threaded holes 51c-54c into which a male screw 57 inserted into the long hole 56d is screwed are formed on the outer periphery of each of the dies 51-54. The male screw 57 screwed into the female threaded holes 51c-54c constitutes a fixing means for fixing the multiple dies 51-54 housed in the holder 56 to the holder 56 in that the male screw 57 is prevented from rotating relative to the holder 56 by the screw head 57a abutting against the periphery of the long hole 56d.

[0053] The multiple dies 51-54 are inserted and fixed into the holder 56 in a connected state so that their respective notches 51b-54b are shifted circumferentially. In this embodiment, in which the rising lengths of both side portions 19a, 19b of the adhesive tape 19 are different, the first die 51 aligns one side portion 19a, which has a shorter rising edge, of the adhesive tape 19 to be attached vertically to the wire 11 with the outer periphery of the wire 11 (Figure 3), the second and third dies 52, 53 sequentially guide the other side portion 19b so that it overlaps the outside of the one side portion 19a already wound around the wire 11 (Figures 4 and 5), and the die 54 located most downstream is configured to overlap the other side portion 19b of the adhesive tape 19 to be attached vertically to the wire 11 on top of the one side portion 19a already affixed to the outer periphery of the wire 11 (Figure 6).

[0054] Specifically, in this embodiment, both sides of the adhesive tape 19 are raised in the Z-axis direction by the tape application machine 20, and so as shown in Figure 3, the leading die 51 is accommodated in the holder 56 with its notch 51b shifted circumferentially so that it is inclined toward the side of the tape that is vertically attached to the wire 11 with the longer rise.As a result, the other side 19b with the longer rise enters the notch 51b, but the one side 19a with the shorter rise cannot enter the notch 51b and is instead attached by being fitted to the outer periphery of the wire 11 by the inner periphery of the insertion hole 51a.

[0055] As shown in Figures 4 and 5, the second and third dies 52, 53 are sequentially accommodated in the holder 56 at 60 degree offsets from the center in the circumferential direction so that their cutouts 52b, 53b gradually incline toward the side with the shorter rise of the tape to be attached vertically to the wire 11. As a result, the length of penetration of the other side portion 19b, which has the longer rise and which penetrates into the cutouts 52b, 53b, is sequentially shortened, and the other side portion 19b is sequentially guided and attached so that it overlaps the outside of the one side portion 19a already wound around the wire 11.

[0056] 6, the die 54 located on the most downstream side is accommodated in the holder 56 with a further shift of 60 degrees toward the side where the tape rises shorter so that the other side portion 19b of the tape to be longitudinally applied to the wire 11 cannot enter. As a result, the die 54 located on the most downstream side affixes the whole of the other side portion 19b of the tape to be longitudinally applied to the wire 11 onto the one side portion 19a already affixed to the outer periphery of the wire 11.

[0057] In addition, in this embodiment, a round hole 56c is formed in the holder 56 to rotatably accommodate the dies 51-54, and a through hole 62 is formed at the boundary between the inner periphery of this round hole 56c and the outer periphery of the multiple dies 51-54, into which a pin 61 can be inserted to prevent the dies 51-54 from rotating around the insertion holes 51a-54a.

[0058] By inserting the positioning pin 61 into the through hole 62, the multiple dies 51 to 54 housed in the holder 56 in an overlapping state are configured to be unable to rotate at the position where the above-mentioned operation occurs.

[0059] Specifically, a groove 56e extending in the direction in which the wire 11 passes is formed on the inner periphery of the round hole 56c in the holder 56, and opposing grooves 51d-54d are formed around the dies 51-54 so as to face the groove 56e when accommodated in the round hole 56c and form a through hole 62 together with the groove 56e.

[0060] In this embodiment, the cross sections of the recessed groove 56e and the opposing grooves 51d-54d opposing the recessed groove 56e are each formed in a semicircular shape so that the cross section of the through hole 62 is circular. A pin 61 having a circular cross section is inserted into the through hole 62 formed by the recessed groove 56e and the opposing grooves 51d-54d and having a circular cross section, and is provided to prevent rotation of the dies 51-54 accommodated in the round hole 56c so that the opposing grooves 51d-54d face the recessed groove 56e.

[0061] The figure shows the case where multiple dies 51-54 are offset at equal angles, so that multiple grooves 56e having a semicircular cross section are formed at equal angles relative to the central axis of the circular hole 56c, and since the second to fourth dies 52-54 are offset by 60 degrees each, the grooves 56e are formed in six locations, each 60 degrees relative to the central axis of the circular hole 56c.

[0062] In this way, the through holes 62 into which the pins 61 are inserted are formed in a total of six places, spaced apart at 60 degree intervals, around the inner circumference of the circular hole 56c of the holder 56. By inserting the positioning pins 61 into the multiple dies 51-54 while shifting them by 60 degrees, it is possible to easily make the multiple dies 51-54 non-rotatable in the holder 56 while shifting them by 60 degrees.

[0063] Next, a description will be given of the manufacture of a linked coil using a winding apparatus equipped with such a taping machine.

[0064] As shown in Figure 9, this linked coil 9 is made up of a number of coils 7 connected by jumper wires 8, but the winding device 10 shown in Figures 10 and 11 includes a winding machine 12 equipped with three winding cores 15, so the manufactured linked coil 9, as shown in Figure 9 again, has three coils 7 made up of wire 11 wound around three split cores 13, two jumper wires 8 connecting adjacent coils 7, and lead wires 6 extending from the coils 7 at both ends.

[0065] Since insulating adhesive tape 19 is applied to each of the jumper wires 8 in the linked coil 9, the manufacturing process involves repeating a winding process and a taping process in that order after a winding preparation process for preparing the winding device 10. These processes will be described in detail below.

[0066] <Winding preparation process> In this preparation step, the wire 11 is arranged in the winding machine 10, but prior to this, a plurality of dies 51 to 54 are selected in a taping machine 50 and fixed to a holder 56 as shown in FIG.

[0067] That is, the multiple dies 51-54 are selected so that they have insertion holes 51a-54a of an optimal size formed based on the thickness of the wire 11 and adhesive tape 19 used for the winding, and the multiple dies 51-54 so selected are housed in a holder 56 in such a manner that their insertion holes 51a-54a are continuous and their notches 51b-54b are shifted circumferentially.

[0068] Here, in this embodiment, a through hole 62 is formed at the boundary between the inner circumference of the circular hole 56c in the holder 56 and the outer circumference of the multiple dies 51-54. Therefore, by inserting a pin 61 into the through hole 62 with the notches 51b-54b of the multiple dies 51-54 shifted circumferentially, rotation of the multiple dies 51-54 around the insertion holes 51a-54a of the multiple dies 51-54 is prohibited, and the shift can be adjusted to an optimal position.

[0069] In this state, the plurality of dies 51 to are fixed to the holder by screwing male screws 57 into the female screw holes 51c to c of the respective dies 51 to , through the long holes d in the holder .

[0070] Here, if fine adjustment of the circumferential misalignment of the dies 51 to 54 is required, the pin 61 is removed from the through hole 62 and the male screw 57 is loosened, and the fine adjustment is made by allowing the multiple dies 51 to 54 to rotate slightly in the circumferential direction. After the fine adjustment is completed, the male screw 57 is again screwed into the female threaded holes 51c to 54c of each of the dies 51 to 54, thereby fixing the multiple dies 51 to 54 whose circumferential positions have been finely adjusted to the holder 56.

[0071] In this manner, the multiple dies 51 to 54 are accommodated and fixed in the holder 56 in a stacked state.

[0072] Next, as shown in Figures 10 and 11, the wire 11 is arranged. The wire 11 is fed from a wire supply source, passed through the upstream nozzle 14, and then passed through the insertion holes 51a to 54a of multiple dies 51 to 54 held by a holder 56.

[0073] Here, in the present invention, the multiple dies 51-54 are connected so that their insertion holes 51a-54a are continuous, so that the wire 11 is inserted through the continuous insertion holes 51a-54a of the multiple dies 51-54 as shown in Figure 2. However, each of the multiple dies 51-54 is formed with notches 51b-54b that open the insertion holes 51a-54a through which the wire 11 is inserted, so that the wire 11 may be allowed to enter the insertion holes 51a-54a through the notches 51b-54b.

[0074] Thereafter, the wire 11 that has been passed through the insertion holes 51a-54a of the multiple dies 51-54 is guided through the downstream nozzle 14 to the winding machine 12, where it is wound around a winding pin (not shown). This winding can be performed by moving the nozzle 14 to wind the end of the wire 11 around a winding pin (not shown), and then the winding process is started from this state.

[0075] <Winding process> In this winding step, as shown in Fig. 10, in a coil winding machine 12, the wire 11 is wound around a split core 13 to form the coil 7 (Fig. 9). The coil winding machine 12 has three winding cores 15 each holding three split cores 13. When winding the wire 11 around the first split core 13, the projecting shaft 15b provided with the holder 15c for supporting the split core 13 around which the wire 11 is wound is projected from the main body 15a, and in this state the spindle 16 is rotated together with the main body 15a.

[0076] This makes it possible to wind the wire 11 that is unwound from the wire supply source and passed through the nozzle 14 only around the divided core 13 attached to the holder 15c at the tip of the protruding retractable shaft 15b. During this winding, the nozzle 14 is moved in the X-axis direction to align and wind the wire 11 around the winding core 3 that rotates together with the spindle 16.

[0077] When the wire 11 is wound around the divided core 13 a desired number of times, the coil 7 (FIG. 9) is formed, and after the coil 7 is formed, the rotation of the spindle 16 is stopped to prevent further winding of the wire 11. Then, the portion of the wire 11 extending from the winding pin (not shown) to the coil 7 becomes the lead wire 6 (FIG. 9) at the start of winding.

[0078] <Taping process> In this taping process, a predetermined length of insulating adhesive tape 19 is applied to the portion of wire 11 that will become crossover wire 8 (FIG. 9). For this purpose, in tape application machine 20, adhesive tape 19 of a predetermined length is applied to the necessary portion of wire 11 that will become crossover wire 8, and adhesive tape 19 thus applied to wire 11 is then attached by wrapping it around wire 11 in taping machine 50.

[0079] To explain the application of adhesive tape 19 to wire 11 by tape application machine 20, as shown in Figure 8(a), the taping table 21 is moved to the tape loading position by table mover 22, and in that state, tape supply machine 30 adsorbs and holds adhesive tape 19 of the desired length onto the taping table 21.

[0080] That is, as shown in Fig. 8(b), the driving cylinder 33 is extended, and the chuck 32 grips the leading end of the adhesive tape 19 extending from the reel 31. Thereafter, as shown in Fig. 8(c), the driving cylinder 33 is contracted, and the chuck 32 pulls out the adhesive tape 19 from the reel 31. The pulled-out adhesive tape 19 is positioned so as to extend above the tape mounting parts 21a, 21b of the taping machine 50.

[0081] Then, as shown in Fig. 8(d), the table mover 22 moves the taping machine 50 upward in the Z-axis direction, and the pulled-out adhesive tape 19 is placed on the tape placement parts 21a, 21b of the taping machine 50, and the back surface of the adhesive tape 19 is sucked onto the tape placement parts 21a, 21b by negative pressure introduced into each tape suction port 21d. Thereafter, as shown in Fig. 8(e), the cutter 34 cuts the adhesive tape 19, and the chuck 32 releases the tip of the adhesive tape 19. In this way, a predetermined length of the adhesive tape 19 is sucked and held on the taping table 21.

[0082] Next, the taping table 21 is moved to the tape application position, and the adhesive tape 19 attached to the taping table 21 is applied to the wire 11.

[0083] Specifically, as shown in Fig. 7(a), the taping table 21 is moved to the tape application position. At this tape application position, the tape guide groove 21c of the taping table 21 is made to face the wire 11 extending between the pair of nozzles 14 (Fig. 10).

[0084] Thereafter, as shown in FIG. 7(b), the taping table 21 is moved upward along the Z axis, the wire 11 is pushed into the tape guide groove 21c, and the adhesive tape 19 placed on the tape placement portions 21a and 21b is drawn into the tape guide groove 21c by the wire 11.

[0085] As a result, the adhesive tape 19 is bent into a J-shape in cross section, and the back surface of the adhesive tape 19 is pressed against the groove bottom 21cc of the tape guide groove 21c, so that the adhesive surface of the adhesive tape 19 is attached to the lower portion of the outer circumferential surface of the wire 11.

[0086] 7(c), the taping table 21 is moved downward in the Z-axis direction, and the wire 11 with the adhesive tape 19 attached thereto is taken out from the tape guide groove 21c. Then, the taping table 21 is moved to a retreat position away from the winding machine 12 so as not to interfere with the nozzle 14 that reciprocates in the X-axis direction in the winding process.

[0087] When the wire 11 is pulled into the tape pull-in groove 21c in this manner, both side portions 19a, 19b of the adhesive tape 19 are raised along both sides of the wire 11. However, in this embodiment, the tape pull-in groove 21c is provided eccentrically on the taping table 21, so that when the wire 11 together with the adhesive tape 19 is subsequently removed from the tape pull-in groove 21c, the height at which one side portion 19a of the adhesive tape 19 attached vertically to the wire 11 rises from the wire 11 is lower than the height at which the other side portion 19b rises from the wire 11, forming a J-shaped cross section.

[0088] The wire 11 to which the adhesive tape 19, bent into a J-shape in cross section in this manner, is then passed through the insertion holes 51a-54a of the multiple dies 51-54 together with the adhesive tape 19, as shown in Figure 2, to affix the adhesive tape to the wire 11 in a wrapped manner.

[0089] The wire 11 may be passed through the insertion holes 51a-54a of the dies 51-54 by winding the wire 11 around the split core 13 shown in Figures 10 and 11, or the dies 51-54 may be moved relative to the wire 11 by moving the multiple dies 51-54 together with the holder 56.

[0090] Here, as shown in FIG. 1, adhesive tape 19 is attached to wire 11, but adhesive tape 19 is attached in a J-shaped cross section and both side portions 19a, 19b are raised from wire 11, so that raised both side portions 19a, 19b of adhesive tape 19 do not pass through insertion holes 51a to 54a.

[0091] However, since notches 51b-54b that open the insertion holes 51a-54a through which the wire 11 is inserted are formed in each of the multiple dies 51-54, it is possible to pass the wire 11 through the insertion holes 51a-54a by inserting both side portions 19a, 19b of the adhesive tape 19 raised from the wire 11 into those notches 51b-54b.

[0092] In the present invention, the multiple dies 51-54 are connected so that the notches 51b-54b are shifted circumferentially around the insertion holes 51a-54a, so that the two side portions 19a, 19b of the adhesive tape 19 that enter the notches 51b-54b are guided toward the shifted side of the notches 51b-54b and are wound around the wire 11.

[0093] Specifically, in this embodiment, the leading die 51 is accommodated in the holder 56 with its notch 51b shifted circumferentially so that it is inclined toward the side with the longer rise of the adhesive tape 19 that is vertically attached to the wire 11. As a result, as shown in Figure 3, the side portion 19a of the adhesive tape 19 with the shorter rise that enters the notch 51b comes into contact with the notch 51b which narrows in the direction of movement of the wire 11, and moves from the notch 51b to the inner circumference of the insertion hole 51a at the downstream end of the die 51, and is attached to the outer periphery of the wire 11 by fitting along the outer periphery of the wire 11.

[0094] When the wire 11 passes through the leading die 51 together with the adhesive tape 19, the other side 19b of the adhesive tape 19, which has a longer rising edge, moves from the notch 51b of the leading die 51 into the notch 52b of the second die 52 and moves together with the wire 11.

[0095] As shown in Figure 4, this second die 52 is accommodated in the holder 56 with its notch 52b shifted circumferentially so that the rising edge of the tape to be vertically attached to the wire 11 is inclined toward the side with the shorter rising edge. As a result, the other side portion 19b with the longer rising edge comes into contact with the notch 52b of the second die 52, which narrows toward the direction of movement of the notch 52b, and the length of insertion of the other side portion 19b into the notch 52b gradually shortens, and the other side portion 19b is guided to overlap the outside of the one side portion 19a that has already been wound around the wire 11 and is affixed.

[0096] When the wire 11 passes through this second die 52 together with the adhesive tape 19, the other side 19b of the adhesive tape 19 moves together with the wire 11 by entering the notch 52b of the second die 52 into the notch 53b of the third die 53.

[0097] As shown in Figure 5, the third die 53 is accommodated in the holder 56 with its notch 53b shifted a further 60 degrees in the circumferential direction, so that the other side portion 19b of the adhesive tape 19 that remains standing comes into contact with the notch 53b of the third die 53, which narrows toward the direction of movement of the notch 53b, and is sequentially guided so as to further overlap the outside of the one side portion 19a that has already been wound around the wire 11, and is then affixed.

[0098] As shown in Figure 6, the fourth die 54, which is the most downstream die, is accommodated in the holder 56 at a further offset by 60 degrees so that the other side 19b of the adhesive tape 19 attached vertically to the wire 11 cannot enter.Therefore, the other side 19b of the adhesive tape 19, which is guided successively to overlap the outside of one side 19a at the downstream end of the third die 53 and applied successively, passes through the insertion hole 54a of the last die 54 together with the wire 11 in a state overlapping one side 19a.

[0099] As a result, the fourth die 54, which is the most downstream, adheres the entire other side 19b of the adhesive tape 19, which is attached vertically to the wire 11, onto the one side 19a that has already been attached to the outer periphery of the wire 11.

[0100] In this manner, the adhesive tape 19 is wound and attached by the taping machine 50 to the portion of the wire 11 that will become the jumper wire 8. The wire 11 to which the adhesive tape 19 is attached in this manner becomes the jumper wire 8 drawn out from the coil 7 made of the wire wound around the split core 13 in the winding process, and this jumper wire 8 is to be looped around a guide pin (not shown) formed on the main body 15a of the winding core 15.

[0101] Then, a winding process is performed in which the wire 11 is wound around the next split core 13, and then a taping process is performed in which adhesive tape 19 is attached to the portion of the wire 11 that will become the jumper wire 8. By repeating these winding and taping processes in sequence, a linked coil 9 is formed in which three coils 7 are linked via two jumper wires 8, as shown in Figure 9. When the wire 11 extending from the third coil 7 to the nozzle 14 is cut, the portion of the wire 11 extending from the third coil 7 to the nozzle 14 becomes the lead wire 6 at the end of the winding.

[0102] The linked coil 9 shown in FIG. 9 manufactured as described above has adhesive tape 19 attached to the jumper wires 8 by a taping machine 50, so that the insulation of the jumper wires 8 is sufficiently ensured by the adhesive tape 19 when the product is subsequently assembled into the stator of the motor.

[0103] The taping process involves simply applying a predetermined length of adhesive tape 19 to the portion of wire 11 that will become crossover wire 8 using tape application machine 20, and then passing the wire through multiple dies 51-54 in taping machine 50.This means that the process of applying adhesive tape 19 to wire 11 can be performed automatically without manual intervention, thereby increasing the productivity of manufacturing linked coil 9.

[0104] In addition, the adhesive tape 19 applied vertically to the wire 11 is entirely wrapped around the wire 11 and applied, so no excess portion is generated. And, since the adhesive tape 19 is applied so as to wrap the wire 11, the insulation of the wire 11 is sufficiently ensured by the adhesive tape 19.

[0105] In particular, in this embodiment, in the tape attachment process, the adhesive tape 19 is attached vertically to the wire 11 so that the rise height of one side 19a is lower than the rise height of the other side 19b and so that the cross section forms a J-shape.Therefore, by simply passing it through the insertion hole 51a of a single die 51, it is possible to perform the first attachment process in which the one side 19a of the adhesive tape 19 with the shorter rise is attached to the outer periphery of the wire 11.

[0106] Then, in the subsequent second attachment step, the adhesive tape 19 is continuously passed through the insertion holes 52a-54a of the multiple dies 52-54 together with the wire 11, so that the other side portion 19b can be attached to the one side portion 19a already attached to the outer periphery of the wire 11. This prevents the taping machine 50 of the present invention, which includes the multiple dies 51-54, from becoming large, and allows it to be installed even in a conventional winding machine with limited installation space.

[0107] Here, the adhesive tape 19 applied vertically to the wire 11 is wound around the wire 11 by passing it through a plurality of dies 51-54 that are offset in the circumferential direction. The degree of winding varies depending on the degree of circumferential offset. However, since the holder 56 has round holes 56c that rotatably accommodate the dies 51-54 and is equipped with fixing means 57 that fixes the multiple dies 51-54 accommodated in the round holes 56c to the holder 56, it is possible to fine-tune the rotation of the multiple dies 51-54 by finely adjusting the degree of circumferential offset and then fixing them to the holder 56 by the fixing means 57.

[0108] Furthermore, when adjustment of the rotational position is not required, by inserting a positioning pin 61 into a through hole 62 at the boundary between the inner circumference of the circular hole 56c of the holder 56 and the outer circumference of the multiple dies 51-54, it is possible to easily bring the multiple dies 51-54 stored in a stacked state in the holder 56 into a position that causes the above-mentioned operation to occur, allowing the adhesive tape 19 to be wrapped around the wire 11, so that no rotation is required.

[0109] In the above-described embodiment, the adhesive tape 19 is attached vertically to the wire 11 by a tape application machine 20 equipped with a taping stand 21, and the back surface of the adhesive tape 19 is adsorbed by negative pressure guided to the taping stand 21.

[0110] However, as long as the adhesive tape 19 can be positioned accurately relative to wire 11 and the adhesive tape 19 can be attached accurately to wire 11, the adhesive tape 19 may be attached vertically to wire 11 without placing the back surface of the adhesive tape 19 on taping table 21, and even if it is placed on taping table 21, it may be clamped by a clamping member without being adsorbed by negative pressure.

[0111] In addition, in the above-mentioned embodiment, a case has been described in which four dies 51 to 54 are used, and the adhesive tape 19 is attached vertically to the wire 11 so that the cross section forms a J-shape, and in the first attachment step, one side 19a is attached to the outer periphery of the wire 11 by a single die 51.

[0112] However, if there is no restriction on installation space and it is possible to make the taping machine 50 relatively large, more than four dies may be used, and in the attachment process, the adhesive tape 19 may be attached to the wire 11 so that its cross section is U-shaped with no difference in length between the left and right sides.

[0113] Furthermore, in the above-described embodiment, the notch surfaces 51ba, 51bb of the leading die 51 intersect at an angle less than 180 degrees, approximately 120 degrees in the figure, and the notch surfaces 52ba, 52bb, 53ba, 53bb, 54ba, 54bb of the other dies 52 to 54 open at 180 degrees to form a plane, but as long as the adhesive tape 19 can be wrapped around the wire 11, the opening angle of the notches of each die is not limited to this.

[0114] For example, it is possible to use dies having both cutout surfaces 51ba, 51bb of all of the dies 51 to 54 that intersect at less than 180 degrees to form a fan-shaped cross section, or it is possible to use dies having both cutout surfaces 51ba, 51bb that open at 180 degrees to form a flat surface. [Explanation of symbols]

[0115] 10 Winding device 11 Wire rod 19 Adhesive Tape 19a One side 19b Other side 50 Taping machine 51~54 Dice 51a~54a Insertion holes 51b~54b Cutout 51d~54d Opposite grooves 56 Holder 56c round hole 56e groove 57 Male thread (fixing means) 61 pin 62 Through hole

Claims

A winding device (10) that arranges a taping machine (50) for winding an adhesive tape (19) of a predetermined length around a wire (11) and a winding machine (12) for winding the wire (11) around a plurality of split cores (13), and repeatedly performs a winding process by the winding machine (12) and a taping process by the taping machine (50), wherein the taping machine (50) includes a plurality of dies (51 - 54) in which insertion holes (51a - 54a) through which the wire (11) moving in a direction toward the winding machine (12) passes are formed, wherein each of the plurality of dies (51 - 54) is formed with a notch (51b - 54b) that allows the entry of the sides (19a, 19b) of the adhesive tape (19) attached to the wire (11) by opening the insertion holes (51a - 54a), wherein the plurality of dies (51 - 54) are connected such that the insertion holes (51a - 54a) are continuous and the notches (51b - 54b) are offset in the circumferential direction of the insertion holes (51a - 54a), and the taping machine (50) passes the adhesive tape (19) of a predetermined length longitudinally attached along the length direction of the wire (11) through the insertion holes (51a - 54a) together with the wire (11) and attaches it to the wire (11). A winding device characterized by the above. According to claim 1, further comprising a tape attaching machine (20) for attaching the adhesive tape (19) to the wire (11) such that both side portions of the adhesive tape (19) of a predetermined length rise from the wire (11). In the taping machine (50) according to claim 1, a first attaching step of attaching one side portion (19a) of the adhesive tape (19) to the outer circumference of the wire (11) is performed by passing the wire (11) to which the adhesive tape (19) is attached through an insertion hole (51a) formed in an upstream die (51) among the plurality of dies (51 - 54). In the taping machine (50) according to claim 2, a second attaching step of attaching the other side portion (19b) of the adhesive tape (19) onto the one side portion (19a) attached to the outer circumference of the wire (11) is performed by passing the wire (11) to which the adhesive tape (19) is attached and which has passed through the upstream die (51) through insertion holes (52a - 54a) formed in downstream dies (52 - 54).

4. A winding method that repeatedly performs a winding process and a taping process using the winding device (10) described in Claim 1, wherein: in the taping process: a tape attachment step of attaching the adhesive tape (19) to the wire (11) such that both side portions (19a, 19b) of the adhesive tape (19) of a predetermined length rise from the wire (11); a first attachment step of attaching one side portion (19a) of the adhesive tape (19) to the outer periphery of the wire (11) by passing the wire (11) to which the adhesive tape (19) is attached through an insertion hole (51a) formed in the upstream die (51); a second attachment step of attaching the other side portion (19b) of the adhesive tape (19) onto the one side portion (19a) attached to the outer periphery of the wire (11) by passing the wire (11) to which the adhesive tape (19) is attached and that has passed through the upstream die (51) through insertion holes (52a - 54a) formed in the downstream dies (52 - 54); are performed.

5. In the tape attachment step, the adhesive tape (19) is attached to the wire (11) such that the rising length of one side portion (19a) of the adhesive tape (19) is shorter than the rising length of the other side portion (19b) of the adhesive tape (19). In the first attachment step, the wire (11) to which the adhesive tape (19) is attached is passed through the insertion hole (51a) of a single upstream die (51). In the second attachment step, the wire (11) to which the adhesive tape (19) is attached is sequentially passed through the insertion holes (52a - 54a) of a plurality of downstream dies (52 - 54). The winding method according to Claim 4.

6. The insertion hole (51a) of the upstream die (51) and the insertion holes (52a - 54a) of the downstream dies (52 - 54) are formed to have a circular cross - section and are formed such that the diameter becomes smaller in the moving direction of the wire (11). In the tape attachment step, the adhesive tape (19) is attached to the wire (11) such that the rising length of one side portion (19a) of the adhesive tape (19) is shorter than the rising length of the other side portion (19b) of the adhesive tape (19). In the first attachment step, one side portion (19a) of the adhesive tape (19) is attached to the outer periphery of the wire (11) by the inner periphery of the insertion hole (51a) of the upstream die (51), and the other side portion (19b) of the adhesive tape (19) enters and passes through the notch (51b) that opens the insertion hole (51a) of the upstream die (51). The winding method according to claim 4.

7. In the second attachment step, the wire (11) with the adhesive tape (19) attached is sequentially passed through the insertion holes (52a to 54a) of a plurality of downstream dies (52 to 54). The winding method according to claim 6.

8. A method for manufacturing a connected coil in which coils (7) each composed of a wire (11) wound around a plurality of divided cores (13) are connected by jumper wires (8), A method for manufacturing a connected coil, comprising obtaining a connected coil (9) in which an adhesive tape (19) is wound around the jumper wire (8) by using the winding method according to any one of claims 4 to 7.

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