End treatment means and winding device

Abstract

To provide an end processing means and a winding device for twisting together the ends of parallel wires to be wound around a stator core of an electric motor, thereby making the ends of the parallel wires less likely to scatter. [Solution] A mechanical section 10 constituting an end processing means 1 is provided with a clamping means 20, a pair of disks 30, a synchronous driving means 40, a means for transmitting a rotational motion 50, and a cutting means 60. In a state in which a parallel wire 100 is clamped and held by a first slit 21 and a fourth slit 24 arranged on the outside constituting the clamping means, a second slit 22 and a third slit 23 provided on each of a pair of disks arranged on the inside are rotated in synchronization by the synchronous driving means and the transmission means, so that the parallel wire between the first slit 21 and the second slit 22 and the parallel wire between the third slit 23 and the fourth slit 24 become a twisted wire. Then, the parallel wire between the second slit and the third slit is cut, and the twisted wire becomes an end of the parallel wire.

Description

[Technical field]

[0001] The present invention relates to an end treatment means and a winding device for twisting together the ends of parallel wires to be wound around a stator core of an electric motor, thereby making the ends of the parallel wires less likely to become scattered.

[0002] More specifically, the present invention relates to an end processing means and a winding device that twist together the ends of a parallel wire in which multiple coil wires are arranged in a parallel state to form an integrated coil wire group through which a large current can flow, similar to a coil wire with a thick wire diameter, and that prevent the ends of the coil wire group from scattering. [Background technology]

[0003] In electric motors that require high output and compact size, there is a demand to reduce the electrical resistance of the coil bundle and improve the performance of the electric motor.In order to reduce the electrical resistance, it is sufficient to increase the cross-sectional area by making the wire diameter of the coil thicker, but thick wire coils are very stiff and difficult to wind.

[0004] In the past, in order to increase the winding density in the slot and reduce the electrical resistance, a technique has been known in which a rectangular wire with a cross section is shaped into an approximately U-shape, and the protruding end of the approximately U-shape is inserted into the slot and welded to form a loop coil. However, this conventional technique has the problem that it is difficult to increase production efficiency because it takes time and effort to shape, bend, and weld the rectangular wire.

[0005] On the other hand, a technique for lowering the electrical resistance of a coil bundle is also known in which a group of coil wires each having a circular cross section is wound around a bobbin to form a coil bundle, which is then inserted into a stator core by a coil insertion machine, and the individual coil wires are connected in parallel to a power source. This conventional technique has the advantage that the coil wires in the slots have an appropriate gap, which provides excellent heat dissipation, and the coil wires are less likely to heat up even when a large current is passed through them, preventing the electrical resistance from becoming large.

[0006] However, because the coil wires are bundled together and inserted into the stator core, the ends of the coil wires (hereinafter referred to as lead wires) are prone to warping due to the pressure applied during insertion, and the lead wires tend to become scattered. In particular, in a stator core using a concentrated winding method, multiple phase coil bundles are inserted adjacent to each other in each slot, and the lead wires are also pulled out of the slots adjacent to each other, so the lead wires of the multiple phase coils tend to become mixed up.

[0007] Therefore, when connecting the lead wires to the electrical connection terminals, workers had to manually select and connect only the lead wires for the coil bundles of the same phase from the many scattered and mixed lead wires, which was time-consuming. Specifically, in a concentrated winding method in which two-phase coil wires are inserted into one slot, if there are 10 coil wires and nine slots, a total of 180 lead wires per stator core had to be selected and connected.

[0008] Patent Document 1 discloses a technique for a tap wire processing device for a variable speed motor. According to the technique described in this document, in a winding device that continuously forms single-wire winding coil bundles, the crossover wire between the previously wound coil bundle and the next coil bundle to be wound is twisted together during the winding process, thereby reducing the effort required for wire connection processing.

[0009] However, according to the technology described in Patent Document 1, a hook is hooked onto a jumper wire and rotated around its axis to fold the jumper wire in half to form a twisted section. This technology has the problem that when the number of coil wire groups arranged in parallel is increased, the twisted section becomes swollen, making it difficult to insert the coil wire groups.

[0010] Patent Document 2 discloses a technique for a winding method for a parallel-wound coil bundle. According to the technique described in this document, a parallel-wound coil bundle is manufactured by winding multiple coil wires in parallel around a winding form, and the coil wire between the previously wound coil bundle and the next coil bundle to be wound is twisted by 180 degrees.

[0011] More specifically, an example is disclosed in which a sector gear is provided with slits, and multiple coil wires are inserted into the slits and twisted 180 degrees. However, the technology described in this document only involves twisting the coil bundle by flipping it upside down, which poses the problem that the twisted lead wires may come undone and scatter in the subsequent process of inserting the coil bundle. [Prior art documents] [Patent documents]

[0012] Patent document 1: Japanese Patent Application Laid-Open No. 57-206202 Patent Document 2: JP 2010-246243 A Summary of the Invention [Problem to be solved by the invention]

[0013] The problem that the present invention aims to solve relates to an end processing means and a winding device that, even when there are a large number of parallel coil wires, first twists together the ends of the parallel wires to form a coil wire group, so that the ends of the coil wires do not come undone when the coil wire group is inserted into a stator core, and so that the lead wires of each phase do not become scattered even after insertion into the stator core. [Means for solving the problem]

[0014] A first aspect of the present invention is an end processing means for twisting together ends of parallel wires that form a coil wire, the end processing means comprising: a clamping means for clamping the parallel wires; a pair of disks; a synchronous drive means; a transmission means; and a cutting means, the clamping means being a slit having a first slit, a second slit, a third slit, and a fourth slit, the slits clamping the extending parallel wires, the first slit and the fourth slit clamping and holding the parallel wires, the second slit and the third slit being disposed between the first slit and the fourth slit, and being slits that cross the center of each of the disks and reach their outer edges, the synchronous drive means rotating the pair of disks in synchronization with each other, the transmission means is disposed on the outer periphery of each of the disks and transmits the rotational motion so as to rotate the parallel wires sandwiched between the second slit and the third slit around the central axis of the parallel wires; the parallel wires remain aligned from the first slit outward, between the second slit and the third slit, and from the fourth slit outward, the parallel wires are twisted between the first slit and the second slit, and between the third slit and the fourth slit; the cutting means is disposed between the second slit and the third slit, and by cutting the parallel wires, the twisted wires on both sides of the cut wires become ends of the parallel wires.

[0015] According to the first invention, the parallel wires are sandwiched between four slits, from the first slit to the fourth slit, and the first and fourth slits arranged on the outside are not rotated, while the second and third slits arranged on the inside are rotated in synchronization with each other. Therefore, between the first and second slits and between the third and fourth slits, the parallel wires sandwiched between the slits are rotated around their central axes and twisted together, and a part of the parallel wires extending in a connected state can be made into a twisted wire.

[0016] The second and third slits in each disk are rotated in synchronism with each other by the synchronous drive means, so the parallel wires between the second and third slits are not twisted and remain aligned. Also, the first and fourth slits are not rotated, so the coil wires remain parallel even outside the first and fourth slits.

[0017] By cutting the parallel wire between the second slit and the third slit, one coil wire group can be divided into two parallel wires: one in which the rear ends of the coil wire group forward from the second slit are twisted together, and the other in which the front ends of the coil wire group rearward from the third slit are twisted together. By applying the end processing means of the first invention to a winding device that produces windings by winding a coil wire around a bobbin, it is possible to produce a coil wire group that corresponds to the winding tendency of the winding to be inserted into a stator core.

[0018] A coil bundle formed from parallel wires with their ends twisted together does not cause the lead wires formed by the ends of the individual coil wires to become scattered, even when the coil bundle is inserted into a stator core using a conventional coil insertion machine, facilitating the work of connecting the wires to the electrical connection terminals.

[0019] Furthermore, the end portions of the coil wires beyond the twisted wires are left aligned and do not overlap, so that when removing the insulation coating of the coil wires, it is easy to strip the insulation coating of each coil wire approximately uniformly, and the stripping process of the insulation coating is easy even when there are a large number of coil wires.

[0020] In addition, it is preferable to arrange the four slits in a straight line, since it is easy to insert the parallel wires into the slits and to twist them in an orderly manner, but this is not limited thereto. For example, the slits may be arranged in a shifted manner according to the layout of the manufacturing device, and the intervals between the slits may not be uniform. In addition, the pair of disks in which the second slit and the third slit are formed may be formed integrally, as long as a cutting means for cutting the coil wire functions between the second slit and the third slit.

[0021] The synchronous drive means may synchronously control a plurality of motors to rotate a pair of disks, or may rotate a pair of disks synchronously using one motor. The manner in which each disk is synchronized using one motor is not limited. For example, the rotational motion may be mechanically transmitted to each disk using a combination of gears, timing pulleys, etc.

[0022] The transmission means is disposed on the outer periphery of each disk, and transmits the rotational motion to the outer periphery of the disk to rotate the second slit and the third slit. Therefore, even if the parallel wires sandwiched between the slits that cross the center of the disk and reach the outer edge are rotated around the central axis, the parallel wires do not come into contact with the transmission means. The transmission means is not limited to gears, and may transmit the rotational motion by the frictional force of a rubber roller with a high friction coefficient, or may transmit the rotational motion by magnetic force.

[0023] According to the first invention, a large number of lead wires are not scattered, and the labor required for connecting the lead wires can be reduced, which is an advantageous effect not found in the prior art. In addition, since the rear end and the front end of two connected parallel wires can be twisted together at the same time with a simple structure, parallel wires with twisted ends can be produced with high production efficiency.

[0024] The second invention of the present invention is an end processing means of the first invention, characterized in that each of the slits constituting the clamping means is arranged in a straight line and the center line of the parallel lines extends in a straight line.

[0025] According to the second aspect of the present invention, each slit and the center line of the parallel wires are linear. This allows the ends of the parallel wires to be twisted around the center line, which is advantageous in that the twisted wires are neatly arranged. Furthermore, the parallel wires can be easily inserted into each slit, and the end processing means can be simplified in structure, which increases versatility.

[0026] A third invention of the present invention is an end processing means of the first invention, characterized in that the transmission means comprises a disk gear formed on the outer periphery of each of the disks forming the second slit and the third slit, a plurality of first rotation transmission gears meshing with each of the disk gears, and a plurality of second rotation transmission gears meshing with each adjacent first rotation transmission gear, each of the first rotation transmission gears is distributed around the disk gear, at least one second rotation transmission gear meshing with an adjacent first rotation transmission gear is omitted, and the outer diameter direction portion of the omitted second rotation transmission gear is an insertion portion of the parallel line into the slit, and the first rotation transmission gear and the second rotation transmission gear transmit the rotational motion generated by the synchronous drive means so as to rotate the pair of disks in which the disk gears are arranged synchronously.

[0027] In the third invention, the transmission means comprises a disk gear disposed on the inside, and a first rotation transmission gear and a second rotation transmission gear disposed on the outside of the disk gear in that order. Since both transmission means are mechanical motion transmission means using meshing gears, it is possible to reliably transmit synchronized rotational motion.

[0028] Specifically, the rotational force generated by the synchronous drive means is transmitted from one of the second rotation transmission gears disposed on the outside to the first rotation transmission gear disposed on the inside, and then transmitted to the other second rotation transmission gear disposed on the outside. This is repeated in sequence, causing all of the first rotation transmission gears to rotate in one direction, and all of the second rotation transmission gears to rotate in the opposite direction to the first rotation transmission gears.

[0029] Then, the rotational motion is transmitted from both sides up to the position where the second rotation transmission gear is omitted. Since the first rotation transmission gear is not arranged inside where the second rotation transmission gear is omitted, when the slit is located at that position, the parallel wire can be inserted into the slit and the parallel wire can be removed outward from the slit.

[0030] According to the third aspect of the present invention, since all of the first and second rotation transmission gears are rotated by rotating any one of the second rotation transmission gears, one motor may be used as the synchronous drive means, which has the following advantages: the power control is simple, the pair of disks are reliably synchronized, the position of one of the second rotation transmission gears is not changed when it is omitted, and the parallel wires can be easily inserted into and removed from the slits.

[0031] A fourth invention of the present invention is an end processing means of the first to third inventions, further characterized in that the end processing means is provided with a first moving means, and the first moving means makes it possible to change the position of each slit along the direction in which the parallel lines extend.

[0032] The length of the lead wire needs to be adjusted according to the distance to the connection position. According to the fourth invention, the position of each slit can be changed along the direction in which the parallel wires extend. This makes it possible to arbitrarily adjust the position where the coil wires are twisted according to the length of the lead wires, which is an advantageous effect of making the end processing means highly versatile.

[0033] The end processing means of the fifth invention of the present invention is the first to third inventions, further characterized in that the end processing means is provided with a second moving means, and the second moving means makes it possible to change the position of each slit in the same direction in any direction intersecting the direction in which the parallel lines extend.

[0034] The coil bundle can be twisted in an orderly manner by aligning the center of the width of the parallel wires with the center of rotation of the pair of disks according to the width of the parallel wires due to the different numbers of coil wires. Also, when winding the parallel wires around the bobbin, it is preferable to wind them in a spiral shape by shifting the positions to prevent tangling.

[0035] According to the fifth aspect of the present invention, even if the number of parallel wires is different, the center of the width of the parallel wires can be aligned with the center of the disk and the parallel wires can be wound without tangling. This has the effect of making a stranded wire with neat ends into a coil wire group, and winding the coil wire group in a neat state around the winding form.

[0036] A sixth aspect of the present invention is a winding device that winds the parallel wires around a bobbin and produces a coil bundle made of the parallel wires to be inserted into a stator core, the winding device comprising the end processing means of the first to third aspects of the present invention, thereby making it possible to provide a winding device that facilitates the work of connecting lead wires. Effect of the Invention

[0037] According to the first aspect of the present invention, a large number of lead wires are not scattered, the labor required for connecting the lead wires can be reduced, and parallel wires with twisted ends can be produced with high production efficiency. According to the second aspect of the present invention, the ends of the parallel wires can be twisted together around the center wire, which has the advantageous effect of making the twisted wire neat.

[0038] According to the third aspect of the present invention, the power control is simple, the pair of disks are reliably synchronized, the position of one of the second rotation transmission gears is omitted and does not change, and the parallel wire can be easily inserted into and removed from the slit. According to the fourth aspect of the present invention, the position where the coil wire is twisted can be adjusted as desired depending on the length of the lead wire, which has the advantageous effect of providing a highly versatile end processing means.

[0039] According to the fifth aspect of the present invention, it is possible to wind the coil wire group, which is made of twisted wires having neat ends, around a winding frame in a neat state. According to the sixth aspect of the present invention, it is possible to provide a winding device that makes it easy to connect lead wires. [Brief description of the drawings]

[0040] [Figure 1] FIG. 4 is a perspective view for explaining the mechanism of an end processing means (Example 1). [Diagram 2] FIG. 1 is an explanatory diagram showing the position where parallel wires are twisted together (Example 1). [Diagram 3] FIG. 2 is a front view illustrating a first moving means (first embodiment). [Figure 4] FIG. 4 is a front view illustrating a second moving means (first embodiment). [Diagram 5] FIG. 2 is a top view illustrating a winding frame constituting the winding device (Example 1). [Figure 6] FIG. 1 is a process diagram (Example 1) for processing the ends of parallel wires that form a coil bundle. [Figure 7] FIG. 2 is a process diagram (Example 1) for processing the ends of parallel wires that form a coil bundle. [Figure 8] 13 shows another specific example of end processing means (Example 2). [Figure 9] 13 shows another specific example of end processing means (Example 3). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] The parallel wires are sandwiched between four slits, and the two inner slits are rotated synchronously, so that the parallel wires are twisted between the end slits and the inner slits.

[0042] Specifically, while the parallel wires are clamped and held between the first and fourth slits arranged on the outside, the second and third slits provided on each of a pair of disks arranged on the inside are rotated in sync by a synchronous drive means and transmission means, so that the parallel wires between the first and second slits, and the parallel wires between the third and fourth slits are twisted into twisted wires. EXAMPLES

[0043] In the first embodiment, an end processing means 1 for twisting the ends of parallel wires will be described with reference to Figs. 1 to 7. Fig. 1 shows a perspective view for explaining the mechanism of the end processing means. In Fig. 1, the second rotation transmission gear is shown in color to easily distinguish between the first rotation transmission gear and the second rotation transmission gear. Fig. 2 shows an explanatory diagram of a cross section taken along the line AA in Fig. 1. Fig. 2(A) shows the parallel wires in a twisted state, and Fig. 2(B) shows the parallel wires in a cut state.

[0044] Fig. 3 shows an explanatory diagram of a first moving means for moving the position of the slit along the direction in which the parallel lines extend. Fig. 3(A) shows an example in which the lead wire is short, and Fig. 3(B) shows an example in which the lead wire is long. Fig. 4 shows an explanatory diagram of a second moving means for moving the position of the slit in a direction intersecting the direction in which the parallel lines extend.

[0045] Fig. 5 shows a top view of the winding frame that constitutes the winding device. Fig. 6 and Fig. 7 show process diagrams that explain a series of manufacturing processes from the parallel wire winding process, the parallel wire end processing process, and the delivery process to the coil insertion machine.

[0046] In the first embodiment, a specific example will be described in which the end processing means 1 is applied to a winding device 200 (see FIG. 3) that winds parallel wires 100 around a bobbin to manufacture a coil bundle. For ease of understanding, the left-right direction in the figure will be described as the first horizontal axis direction, the depth direction as the second horizontal axis direction, and the height direction as the vertical axis direction. Also, an example will be described in which a group of parallel coil wires is arranged in the vertical axis direction, but the direction in which the group of coil wires is arranged is not limited to the vertical axis direction.

[0047] The mechanical section 10 of the end processing means 1 comprises four slits forming the parallel wire clamping means 20, a pair of disks 30, a synchronous drive means 40 for synchronously rotating the pair of disks, a transmission means 50 for transmitting the rotational motion to the disks, and a coil wire cutting means 60 (see FIG. 1).Furthermore, it comprises a first moving means 70 and a second moving means 80 for changing the position of the slits forming the clamping means (see FIGS. 3 and 4).

[0048] The slits constituting the clamping means 20 are made up of a first slit 21, a second slit 22, a third slit 23, and a fourth slit 24 (see Figs. 1 and 2). The four slits are arranged in a straight line so that the parallel wire 100 can be easily inserted into the slits. The width of each slit is narrow enough to fit the wire diameter of one coil wire.

[0049] The first slit 21 and the fourth slit 24 are arranged on both sides of the pair of disks 30 to sandwich and hold the parallel wire 100 so that only the ends of the extending parallel wire 100 are twisted together (see FIG. 1). Of the first slit 21 and the fourth slit 24, one of the two side portions forming the slit has a long extending guide portion 25 and the other has a curved tip portion 26, making it easy to insert the parallel wire 100 into the slit.

[0050] The second slit 22 and the third slit 23 are provided in a pair of disks 30, 30 arranged between the first slit 21 and the fourth slit 24. The second slit 22 and the third slit 23 are slits that cross the center of each disk 30 and reach the outer edge. The parallel wire 100 is inserted to an inner position of the slit and clamped so that its central axis is aligned with the center position of the disk 30.

[0051] The arrangement of the slits is not limited to being aligned in a straight line, and some of the slits may be shifted in position depending on the layout of the winding device, the bobbins that store the coil wire, etc. The spacing between the slits is also not limited, and they may be aligned at equal intervals or at different intervals.

[0052] In the end processing means 1 shown in the first embodiment, an example will be described in which the rotational motion generated by one servo motor 41 as the synchronous drive means 40 is synchronized with a pair of disks 30, 30 arranged on the left and right sides by a mechanical motion transmission means (see Figure 1).

[0053] The synchronous drive means 40 branches the rotational motion by a servo motor 41, a first timing pulley 42 attached to the servo motor, a second timing pulley 43, a timing belt 44 stretched between the pair of timing pulleys, a pair of shaft bodies 45, 45 extending from both sides of the second timing pulley, and gears 46 attached to each of the shaft bodies 45. The gears 46 are engaged with a gear forming the transmission means 50.

[0054] The transmission means 50 transmits the rotational motion generated by the synchronous drive means 40 to each of the disks 30, 30, and synchronously rotates the second slit 22 and the third slit 23. Below, a specific example of the transmission means in which gears, which are mechanical motion transmission means, are combined will be described.

[0055] The transmission means 50 comprises a disk gear 31 formed on the outer periphery of each disk, a first rotation transmission gear 51 meshing with the disk gear 31, and a second rotation transmission gear 52 (see the colored portion in FIG. 1) meshing with each adjacent first rotation transmission gear. The disk gear 31 is provided on the entire outer periphery of the disk 30 except for the positions of the second slit 22 and the third slit 23 into which the parallel wire 100 is inserted from the side. The first rotation transmission gears 51 are distributed and disposed at five positions along the outer periphery of the disk gear 31.

[0056] The four second rotation transmission gears 52 are meshed with adjacent first rotation transmission gears 51. The rotational motion generated by the synchronous drive means 40 is first transmitted to the first rotation transmission gear 51 meshed with the gear 46. The rotational motion of the first rotation transmission gear 51 is transmitted to the adjacent second rotation transmission gears 52, 52 and the disk gear 31, so that the disk gear 31 and all the second rotation transmission gears 52 rotate in one direction, and all the first rotation transmission gears 51 rotate in the opposite direction to the rotational direction of the disk gear 31 (see the arrow in FIG. 1).

[0057] Further, the second rotation transmission gear 52 is omitted in one location on the lower side of the disk 30 among the five gaps formed by adjacent first rotation transmission gears 51. The parallel wire 100 is inserted into the second slit 22 and the third slit 23 from the lower side of the disk where the second rotation transmission gear is omitted.

[0058] The central axis of the first rotation transmission gear 51 and the central axis of the second rotation transmission gear 52 are rotatably supported by a support plate (not shown) having a shape that does not contact the parallel line 100. Since each of the disks 30, 30 is supported by the first rotation transmission gear 51 and the second rotation transmission gear 52, the disks do not need to be supported by a shaft.

[0059] The cutting means 60 is composed of scissors 61 and an air cylinder 62, and the tip side of the scissors is disposed between the second slit 22 and the third slit 23. The tip side of the scissors 61 is opened wide enough not to come into contact with the parallel line 100 (see FIG. 1). When cutting the parallel line, the tip side of the scissors 61 is closed by the air cylinder 62, and the parallel line 100 extending between the second slit 22 and the third slit 23 is cut (FIG. 2(A)).

[0060] By rotating the pair of disks 30, 30 to twist the parallel wires between the first slit 21 and the second slit 22 and the parallel wires between the third slit 23 and the fourth slit 24 into a twisted wire 101, and then cutting the parallel wire 100 between the second slit 22 and the third slit 23, the parallel wire 100 is divided into a parallel wire 102 whose end ends are twisted together and a parallel wire 103 whose starting ends are twisted together (Figure 2(B)).

[0061] The first moving means 70 moves the mechanism 10 constituting the end processing means 1 along the direction in which the parallel wire 100 extends, thereby changing the positions of the four slits 21, 22, 23, 24 and making it possible to change the length of the lead wire (see arrow α in Figure 3).

[0062] Specifically, the first moving means 70 comprises a first slide plate 71 on which the mechanical part 10 is arranged, a first ball screw shaft 72 extending in a first horizontal axis direction, a first drive motor 73 rotating the first ball screw shaft around its axis, and a first rail 74 extending along both the upper and lower sides of the first ball screw shaft (see FIG. 3).

[0063] The first slide plate 71 has, on the rear side of the surface on which the mechanical unit 10 is disposed, a female screw portion to be screwed onto the first ball screw shaft 72 and a recess to be fitted onto the first rail 74. When changing the length of the lead wire, after the parallel wires 100 are inserted into the four slits, the first drive motor 73 is driven to slide the first slide plate 71 along the direction in which the parallel wires 100 extend (see arrow α in FIG. 3).

[0064] The sliding distance of the first sliding plate 71 may be adjusted according to the length of the lead wire. For example, the moving distance of the slit may be registered in a memory means constituting a programmable logic controller (hereinafter, referred to as PLC) which is a control device for industrial machinery, and the rotation angle of the first drive motor may be controlled according to the moving distance read by a control means constituting the PLC to adjust the length of the lead wire.

[0065] It should be noted that the first moving means 70 is not limited to a ball screw shaft, and may of course be a known air cylinder or the like.

[0066] The second moving means 80 can change the positions of the four slits 21, 22, 23, 24 in the same direction intersecting with the direction in which the parallel wire 100 extends (see arrow β in FIG. 4 and FIG. 3(B)). Here, the parallel wire 100 is inserted into each slit by moving the four slits constituting the mechanism unit 10 in the vertical axis direction using the second moving means 80. When the number of turns of the coil bundle is changed, the distance by which the slit is moved by the second moving means can be adjusted.

[0067] The second moving means 80 is composed of a second slide plate 81 on which the first moving means 70 is disposed, a second ball screw shaft 82 extending in the vertical axial direction, a second drive motor 83 for rotating the second ball screw shaft about its axis, a second rail 84 extending along the side of the second ball screw shaft, and legs 85 for supporting these (see FIG. 4). The legs 85 may be mounted on a base or the like of the winding device 200.

[0068] Similar to the first slide plate, the second slide plate 81 also has a female screw portion on the rear side for screwing onto the second ball screw shaft 82, and a recess into which the second rail 84 is fitted.

[0069] Here, a winding device 200 to which the present invention is applied will be briefly described with reference to a front view of the winding device shown in Fig. 4 and a top view of a reel 201 shown in Fig. 5. To facilitate understanding, a pair of winding portions are hatched in Fig. 5. Fig. 5(A) shows the state before winding begins, and Fig. 5(B) shows the state after winding is completed.

[0070] The winding device 200 includes a reel 201 for winding the parallel wire 100, a nozzle 202 for bundling a plurality of coil wire groups 104 and drawing the parallel wire 100 to the forward end, and an articulated arm 203 for enabling the nozzle 202 to move in three axial directions (see FIG. 4).

[0071] The winding frame 201 (see FIG. 5) includes a base 210, a gripping portion 211 for gripping the starting end of the parallel wires, a pair of winding portions 212 for winding the parallel wires 100 into a coil bundle, and a spacing changer 213 for changing the spacing between the pair of winding portions 212. The base 210 is rotated along a horizontal plane around a drive shaft 214 of a servo motor (see FIG. 4). The gripping portion 211, the pair of winding portions 212, and the spacing changer 213 are provided on the lower surface side of the base 210, and the drive shaft 214 is provided on the top surface side of the base 210 (see FIG. 4).

[0072] The pair of winding parts 212 have an outer circumferential side curved in an arc shape so that the parallel wire 100 has an oval shape (see FIG. 5). The spacing change means 213 narrows the gap between the pair of winding parts 212 after winding is completed, thereby allowing the parallel wire 100 to slide off and be removed from the pair of winding parts 212. The spacing change means 213 may be a known ball screw shaft or the like, and the form is not limited.

[0073] Nozzle 202 pulls coil wire group 104 drawn from a plurality of bobbins into parallel wires 100 arranged in a vertical line through holes arranged in a vertical line through which coil wire group 104 passes, toward the front side (see FIG. 4). The tips of parallel wires 100 extending from nozzle 202 are previously formed into twisted wires 101 by end processing means. Articulated arm 203 may be a known industrial articulated robot.

[0074] Here, the winding process of the parallel wire 100 (FIGS. 6(A) to 6(D)), the end processing process of the parallel wire (FIGS. 7(E) and 7(F)), and the delivery process of delivering the coil bundle formed by winding the parallel wire to the coil insertion machine (FIGS. 7(G) and 7(H)) will be described with reference to the process diagrams shown in FIG. 6 and FIG. 7. Note that in each process diagram, the ball screw shaft and rail constituting the first moving means and second moving means are omitted for ease of understanding.

[0075] First, the articulated arm 203 is operated to move the nozzle 202 close to the gripping portion 211 constituting the reel 201, and the tip of the parallel wire 100 is gripped by the gripping portion 211 (FIG. 6(A)). The nozzle 202 is moved in the first horizontal axis direction, and the parallel wire 100 pulled out from the nozzle 202 is aligned along the sides of the pair of winding portions 212 (see the arrows in FIG. 6(B)).

[0076] From this state, the reel 201 is rotated along a horizontal plane, and the nozzle 202 is lowered, so that the parallel wires 100 supplied from the nozzle are spirally wound around the pair of winding parts 212 to form the coil bundle 105 (see FIG. 6(C)). Note that the reel 201 is rotated n and a half revolutions (n ​​is an integer) so that the stranded wires 101 at both ends of the coil bundle 105 are on the outside of the blade shaft 302 constituting the coil insertion machine 300 shown by the dashed line (see FIG. 7(G)).

[0077] Once the winding of the parallel wire 100 is complete, the nozzle 202 is moved along the first horizontal axis direction by the articulated arm 203, and the parallel wire 100 is positioned below the four slits 21, 22, 23, and 24 provided in the mechanism unit 10, and the end processing process begins (see Figure 6(D)).

[0078] In the end processing step, first, the second moving means 80 moves the four slits 21, 22, 23, 24 down toward the parallel wire 100, so that the parallel wire 100 is sandwiched between the slits (see FIG. 7(E)). When adjusting the length of the lead wire, at this stage the first moving means 70 moves the positions of the four slits along the extension direction of the parallel wire 100.

[0079] After adjusting the positions of the four slits 21, 22, 23, 24 to match the length of the lead wire, the pair of disks 30, 30 are rotated synchronously to form a twisted wire 101 between the first slit 21 and the second slit 22, and between the third slit 23 and the fourth slit 24 (see Figures 7(F) and 7(G)).

[0080] Subsequently, the section between the second slit 22 and the third slit 23 is cut by the cutting means 60. After the parallel lines are cut, the four slits 21, 22, 23, and 24 are raised by the second moving means 80 to remove the parallel lines 100 from the slits (see FIG. 7(G)).

[0081] In the coil bundle delivery process, first, the coil insertion machine 300 is raised by the lift shaft 301, and the tip position of the blade shaft 302 constituting the coil insertion machine is aligned with the lower end position of the coil bundle 105 wound around the bobbin 201 (see FIG. 7(G)). Subsequently, the gap between the pair of winding parts 212 is narrowed by the gap changing means 213 to release the tension on the coil bundle 105.

[0082] As the tension on the coil bundle 105 is released, the coil bundle is handed over from the pair of winding sections 212 to the coil insertion machine 300 in a sliding manner, and is hooked onto the blade shaft 302 (see FIG. 7(H)). Once the coil bundle has been handed over, the coil insertion machine 300 is lowered by the lifting shaft 301. The process shown in FIGS. 6(A) to 7(H) is repeated the number of times equal to the number of coil bundles to be simultaneously inserted into the stator core, and the series of processes is completed. EXAMPLES

[0083] In the second embodiment, the end processing means 2 will be described with reference to Fig. 8. Fig. 8 shows the end processing means 2 equipped with two servo motors as synchronous drive means for respectively rotating disks on which the second slit and the third slit are formed. In the second embodiment, the same components as those in the first embodiment are given the same reference numerals and the description thereof is omitted.

[0084] In the end processing means 2, the synchronous drive means 40 includes two servo motors 41, 41 and a control means 47 that synchronously controls the two servo motors (see FIG. 8). The rotational motion generated in each servo motor 41 is transmitted by a transmission means 50 disposed on the outer periphery of each disk 30, 30. The two servo motors have the same performance.

[0085] The control means 47 electrically connects a known PLC or microcontroller to the servo motors 41 and inputs the same electrical signals to the two servo motors 41, 41 so that the start and end of drive, the rotation direction, and the rotation speed of the two servo motors 41, 41 are synchronized. EXAMPLES

[0086] In the third embodiment, the end processing means 3 will be described with reference to Fig. 9. Fig. 9 shows the end processing means 3 in which a pair of disks are integrated. In the third embodiment, the same configurations as those in the first embodiment are given the same reference numerals and the description thereof is omitted. In the end processing means 3, a pair of disks 32, 32 are integrated by a connecting shaft body 33 that connects the opposing end faces of the disks 32, 32, so that they rotate synchronously. The connecting shaft body 33 is provided on the upper edge of the disks 32.

[0087] The synchronous drive means 40 includes two servo motors 41, 41 and a control means 47 for synchronously controlling the servo motor 41. The transmission means 53 includes two rubber rollers 54, 54 that contact the outer periphery of at least one of the disks, and are rotated synchronously by the servo motor 41. In this case, a disk gear does not need to be provided on the outer periphery of the disk 32. Needless to say, the number of rubber rollers and servo motors is not limited.

[0088] The front side of the cutting means 60 is opened wider than the orbit of the connecting shaft body 33 so as not to come into contact with the connecting shaft body 33 which revolves around the central axis of the disk 32, except when cutting the parallel wires 100. Moreover, the scissors 61 constituting the cutting means have their respective cutting blades opened and closed by air cylinders 62, 62 so that the front side can be opened wide.

[0089] When cutting the parallel wire 100, the rotation of the pair of disks 32, 32 is stopped when the connecting shaft body 33 reaches the opposite side of the cutting means 60 so as not to come into contact with the tip side of the scissors 61, and the tip side of the scissors is closed to cut the parallel wire 100. Specifically, when the connecting shaft body reaches the lowest position of the orbit, the rotation of the disk 32 is stopped to cut the parallel wire 100. After cutting the parallel wire 100, to remove the parallel wire 100 from the slit, the disk 32 is rotated another half turn to point the open ends of the second slit 22 and the third slit 23 downward, and the parallel wire is pulled out.

[0090] (others) In the above embodiment, the transmission means is described as being a gear or a rubber roller, but the transmission means is not limited to these and may be a non-contact transmission mechanism that transmits rotational motion to a pair of disks using magnetic force. In the first embodiment, the movements by the first moving means and the second moving means are separated, but it goes without saying that the directions of the movements by the first moving means and the second moving means may be combined to move in a diagonal direction. In the first embodiment, all the slits are moved by the first moving means, but it is of course possible to move only some of the slits. The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The technical scope of the present invention is not limited to the above description but is indicated by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0091] 1, 2, 3... end processing means, 100... parallel wire, 101... twisted wire, 10...mechanism portion, 20...clamping means, 30...disk, 40...synchronous drive means, 50...transmission means, 60...cutting means, 70...first moving means, 80...second moving means, 21...first slit, 22...second slit, 23...third slit, 24...fourth slit, 25... guide portion, 26... curved tip portion, 31... disk gear, 32... disk, 33... connecting shaft body, 41... servo motor, 42... first timing pulley, 43... second timing pulley, 44... timing belt, 45... shaft body, 46... gear, 47... control means, 51: first rotation transmission gear; 52: second rotation transmission gear; 53...transmission means, 54...rubber roller, 61... scissors, 62... air cylinder, 71: first slide plate; 72: first ball screw shaft; 73: first drive motor; 74: first rail; 81: second slide plate; 82: second ball screw shaft; 83: second drive motor; 84: second rail; 85: leg; 102, 103...parallel wires, 104...coil wire group, 105...coil bundle, 200...winding device, 201...winding frame, 202...nozzle, 203...multi-joint arm, 210: base; 211: gripping portion; 212: winding portion; 213: distance changing means; 214: drive shaft; 300: coil insertion machine, 301: lifting shaft, 302: blade shaft

Claims

1. An end processing means for twisting together the ends of parallel wires of a coil wire, The parallel wire cutting machine includes a clamping means for clamping the parallel wires, a pair of disks, a synchronous driving means, a transmission means, and a cutting means, the clamping means is a slit including a first slit, a second slit, a third slit and a fourth slit, and clamps the parallel lines extending through the slits; The first slit and the fourth slit sandwich and hold the parallel wires, The second and third slits are disposed between the first and fourth slits and extend across the center of each of the disks to the outer edge thereof; The synchronous drive means rotates the pair of disks in synchronization with each other, the transmission means is disposed on the outer periphery of each of the disks and transmits the rotational motion so as to rotate the parallel wires sandwiched between the second slit and the third slit about a central axis of the parallel wires; the parallel lines remain aligned from the first slit outward, between the second slit and the third slit, and from the fourth slit outward; the parallel wires are twisted between the first slit and the second slit and between the third slit and the fourth slit; the cutting means is disposed between the second slit and the third slit, and by cutting the parallel wire, the stranded wires on both sides of the cut wire are made into ends of the parallel wire; An end processing means.

2. The slits constituting the clamping means are arranged in a straight line, The center line of the parallel lines extends linearly.

2. The end treatment means according to claim 1.

3. the transmission means includes a disk gear formed on an outer periphery of each of the disks forming the second slit and the third slit, a plurality of first rotation transmission gears meshing with each of the disk gears, and a plurality of second rotation transmission gears meshing with each of the adjacent first rotation transmission gears, Each of the first rotation transmission gears is disposed around the disk gear in a distributed manner, At least one second rotation transmission gear meshing with an adjacent first rotation transmission gear is omitted, an outer diameter direction portion of the omitted second rotation transmission gear is an insertion portion of the parallel line into the slit, a first rotation transmission gear and a second rotation transmission gear transmit the rotational motion generated by the synchronous drive means so as to rotate the pair of disks synchronously; 2. The end treatment means according to claim 1.

4. Furthermore, the end processing means includes a first moving means, The first moving means is capable of changing the position of each slit along the direction in which the parallel lines extend. The end treatment means according to any one of claims 1 to 3.

5. Furthermore, the end processing means includes a second moving means, The second moving means can change the positions of the respective slits in the same direction in any direction intersecting with the direction in which the parallel lines extend. The end treatment means according to any one of claims 1 to 3.

6. A winding device for manufacturing a coil bundle made of the parallel wires by winding the parallel wires around a winding form and inserting the parallel wires into a stator core, comprising: The end treatment means according to any one of claims 1 to 3 is provided. A winding device comprising:

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