End processing means and winding device

Abstract

To provide an end processing means and winding device that twists the ends of parallel wires wound around the stator core of an electric motor, thereby preventing the ends of the parallel wires from scattering. [Solution] The mechanism 10 forming the end processing means 1 is equipped with a clamping means 20, a pair of discs 30, a synchronous drive means 40, a rotational motion transmission means 50, and a cutting means 60. The parallel wires 100 are held by the first slit 21 and fourth slit 24, which are located on the outside and form the clamping means. The synchronous drive means and transmission means rotate the second slit 22 and third slit 23, which are provided on each of the pair of discs located on the inside, in a synchronous manner, causing 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, to become stranded wires. The parallel wires between the second slit and the third slit are then cut, and the stranded wires become the ends of the parallel wires.

Description

Technical Field

[0001] The present invention relates to end processing means and a winding device for twisting the ends of parallel wires wound around a stator core forming an electric motor, so that the ends of the parallel wires are not easily scattered.

[0002] More specifically, the present invention relates to end processing means and a winding device for twisting the ends of parallel wires in which a plurality of coil wires are in a parallel state, so as to form an integrated coil wire group capable of flowing a large current, similar to a coil wire having a thick wire diameter in the entire parallel wire, and preventing the ends of the coil wire group from being scattered.

Background Art

[0003] In an electric motor that requires high output and miniaturization, it is required to reduce the electrical resistance value of the coil bundle and improve the performance of the electric motor. To reduce the electrical resistance value, the wire diameter of the coil wire may be increased to increase the cross-sectional area. However, a coil wire with a thick wire diameter has high rigidity and is difficult to wind.

[0004] Conventionally, in order to increase the winding density in the slot and reduce the electrical resistance value, a flat wire with a rectangular cross-sectional shape is shaped into a substantially U shape, inserted into the slot from the protruding end of the substantially U shape, and the protruding end is welded to form a coil forming a loop. However, in the case of this conventional technology, there is a problem that it takes time and effort for forming, bending, welding, etc. of the flat wire, and it is difficult to improve the production efficiency.

[0005] On the other hand, as a technology for reducing the electrical resistance value of the coil bundle, a coil wire group formed by coil wires having a circular cross-sectional shape is wound around a winding frame to form a coil bundle, and the coil bundle is inserted into a stator core by a coil inserter, and individual coil wires are connected in parallel to a power source. This technology is also known. In the case of this conventional technology, since there is an appropriate gap in the coil wires in the slot, the heat dissipation performance is excellent, and the coil wires are not easily heated even when a large current flows, and the electrical resistance value does not increase.

[0006] However, because bundles of coil wires are inserted into the stator core, the pressure during insertion makes the ends of the coil wires (hereinafter referred to as lead wires) prone to bending, and the lead wires tend to become scattered. In particular, in stator cores with a concentrated winding method, bundles of multiple phase coils are inserted adjacent to each other in each slot, and the lead wires are also drawn out of the slots adjacent to each other, making it easy for the lead wires of multiple phase coils to get mixed up.

[0007] Therefore, when connecting the lead wires to the electrical terminals, it was time-consuming for workers to manually select only the lead wires for the coil bundles of the same phase from among the many scattered and mixed lead wires. Specifically, in a concentrated winding system where two-phase coil wires are inserted into one slot, if there are 10 coil wires and 9 slots, a total of 180 lead wires had to be selected and connected per stator core.

[0008] Patent Document 1 discloses a technology for a tap wire processing device for a variable speed motor. According to the technology described in this document, in a winding device that continuously forms bundles of single-wire coils, the connecting wires between the previously wound coil bundle and the next coil bundle to be wound are twisted together during the winding process to reduce the effort required for connection.

[0009] However, according to the technology described in Patent Document 1, a hook is attached to the jumper wire, and the hook is rotated around its axis to fold the jumper wire in half and form a twisted section. With this technology, when the number of parallel coil wires is increased, the twisted section becomes enlarged, which presents a problem in that inserting the coil wires becomes difficult.

[0010] Patent Document 2 discloses a method for winding parallel coil bundles. According to the technique described in this document, a parallel coil bundle is manufactured by winding multiple coil wires in parallel onto a winding frame, and the coil wires spanning between the previously wound coil bundle and the next coil bundle are twisted by 180 degrees.

[0011] More specifically, an example is disclosed in which a fan-shaped gear is equipped with slits, and multiple coil wires are inserted into the slits and twisted 180 degrees. However, the technique described in this document only reverses the top and bottom of the coil bundle and twists it, so there is a problem that the twisted lead wires may unravel and scatter in subsequent processes such as the coil bundle insertion process. [Prior art documents] [Patent Documents]

[0012] Patent document 1: Japanese Patent Application Laid-open No. 57-206202 Patent Document 2: Japanese Unexamined Patent Publication No. 2010-246243 [Overview of the project] [Problems that the invention aims to solve]

[0013] The problem that the present invention aims to solve is a means for processing ends and a winding device that, even when there are many parallel coil wires, pre-twist the ends of the parallel wires to form a group of coil wires, so that the ends of the coil wires do not unravel when the group of coil wires is inserted into the stator core, and so that the lead wires of each phase do not scatter even after insertion into the stator core. [Means for solving the problem]

[0014] The first aspect of the present invention is an end processing means for twisting the ends of parallel wires formed by a coil, comprising a clamping means for clamping the parallel wires, a pair of discs, a synchronous driving means, a transmission means, and a cutting means, wherein the clamping means is a slit consisting of a first slit, a second slit, a third slit, and a fourth slit, the slits clamp the parallel wires extending from it, the first slit and the fourth slit clamp and hold the parallel wires, the second slit and the third slit are positioned between the first slit and the fourth slit and are slits that cross the center of each disc and extend to the outer edge, and the synchronous driving means rotates the pair of discs in a synchronous motion The transmission means is arranged on the outer circumference of each of the disks and transmits the rotational motion so that the parallel wires sandwiched between the second and third slits rotate around the central axis of the parallel wires. The parallel wires remain aligned outward from the first slit, between the second and third slits, and outward from the fourth slit. Between the first and second slits, and between the third and fourth slits, the parallel wires are twisted together. The cutting means is arranged between the second and third slits and cuts the parallel wires, so that the twisted wires on both sides of the cut become the ends of the parallel wires.

[0015] According to the first invention, parallel wires are held between four slits, from the first to the fourth slit. The first and fourth slits, which are located on the outside, are not rotated, while the second and third slits, which are located on the inside, are rotated in sync. As a result, between the first and second slits, and between the third and fourth slits, the parallel wires held between the slits are rotated around their central axis and twisted together, making a portion of the connected parallel wires a twisted wire.

[0016] The second and third slits on each disk rotate synchronously due to a synchronous drive mechanism, so the parallel wires between the second and third slits do not twist together and remain aligned. Furthermore, since the first and fourth slits do not rotate, the coil wires remain parallel even beyond the first slit and beyond the fourth slit.

[0017] By cutting parallel wires between the second and third slits, a single coil wire group can be divided into two: a parallel wire formed by twisting the rear ends of the coil wire group beyond the second slit, and a parallel wire formed by twisting the front ends of the coil wire group behind the third slit. By applying the end processing means of the first invention to a winding device that produces windings by winding coil wires onto a winding frame, it is possible to produce a coil wire group that corresponds to the winding tendency of the winding to be inserted into the stator core.

[0018] Even when a coil bundle formed by twisted parallel wires is inserted into a stator core using a conventional coil insertion machine, the lead wires formed by the ends of the individual coil wires do not scatter, making it easier to connect them to electrical terminals.

[0019] Furthermore, the ends of the coil wires beyond the stranded wires remain aligned, with no overlapping coil wires. Therefore, when removing the insulation coating from the coil wires, it is easier to strip the insulation coating from each coil wire almost uniformly, making the insulation stripping process easier even with a large number of coil wires.

[0020] While arranging the four slits in a straight line is preferable as it makes it easier to insert parallel wires into the slits and twist them together in a neat manner, it is not limited to this arrangement. For example, the slits may be offset from each other depending on the layout of the manufacturing equipment, and the spacing between each slit does not have to be uniform. Furthermore, the pair of discs on which the second and third slits are formed may be integrally formed as long as a cutting means for cutting the coil wire functions between the second and third slits.

[0021] The synchronous drive means may synchronously control a plurality of motors to rotate a pair of disks in synchronization, or may rotate a pair of disks in synchronization by one motor. The mode of synchronizing each disk with one motor is not limited. For example, by combining gears, timing pulleys, etc., the rotational movement may be mechanically transmitted to each disk.

[0022] The transmission means is arranged on the outer periphery of each disk, and transmits the rotational movement to the outer periphery of the disk to rotate the second slit and the third slit. Therefore, even if the parallel lines sandwiched by the slits crossing the center of the disk and reaching the outer edge are rotated around its central axis, the parallel lines do not contact the transmission means. The transmission means is not limited to gears, and the rotational movement may be transmitted by the frictional force of a rubber roller with a high coefficient of friction, or may be transmitted by magnetic force, and is not limited.

[0023] According to the first invention, there is an advantageous effect that does not exist in the prior art, that is, a large number of lead wires do not scatter, and the labor of the lead wire connection work can be reduced. In addition, due to the simple structure, the rear end and the front end of the two connected parallel lines at the front and the rear can be twisted simultaneously, so that an effect of being able to produce a parallel line with twisted ends with high production efficiency is achieved.

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

[0025] According to the second invention, each of the slits and the center line of the parallel line both extend linearly. Thereby, an advantageous effect is achieved that the ends of the parallel lines can be twisted around the center line, and the twisted wire is in an orderly state. Furthermore, it is easy to insert the parallel lines into the respective slits, and the end processing means has a simple structure, so that the versatility can be enhanced.

[0026] The third invention of the present invention is the end processing means of the first invention, wherein the transmission means includes 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, and at least one second rotation transmission gear meshing with an adjacent first rotation transmission gear is omitted. The outer diameter direction portion of the omitted second rotation transmission gear is the insertion portion of the parallel line into the slit. The first rotation transmission gear and the second rotation transmission gear transmit the rotational motion generated by the synchronous drive means to rotate the pair of disks on which the disk gear is arranged in synchronization.

[0027] In the third invention, as the transmission means, it includes a disk gear arranged inward and, in order outward, a first rotation transmission gear and a second rotation transmission gear. Since any of the transmission means is a mechanical motion transmission means by gear meshing, a rotation motion synchronized reliably can be transmitted.

[0028] Specifically, the first rotation transmission gear arranged inward transmits the rotational force generated by the synchronous drive means from one of the second rotation transmission gears arranged outward and transmits it to the other second rotation transmission gear arranged outward. This is repeated in order, all the first rotation transmission gears are rotated in one direction, and all the second rotation transmission gears are rotated in the opposite direction to the first rotation transmission gears.

[0029] And the rotational motion is transmitted from both sides up to the position where the second rotation transmission gear is omitted. Since no first rotation transmission gear is arranged inward where the second rotation transmission gear is omitted, when a slit is located at that position, the parallel line can be inserted inward of the slit, and the parallel line can be removed outward from the slit.

[0030] According to the third invention, since the rotation of any of the second rotary transmission gears rotates all of the first and second rotary transmission gears, only one motor needs to be used as the synchronous drive means. This results in simple power control, reliable synchronization of the pair of discs, no change in the position where one of the second rotary transmission gears is omitted, and easy insertion and removal of parallel wires into the slits.

[0031] The fourth invention of the present invention is an end processing means according to the first to third inventions, further characterized in that the end processing means comprises 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.

[0032] The length of the lead wires needs to be adjusted according to the distance to the connection point. According to the fourth invention, the position of each slit can be changed along the direction in which the parallel wires extend. This allows the position where the coil wires are twisted together to be arbitrarily adjusted according to the length of the lead wires, resulting in the advantageous effect of providing a highly versatile end treatment means.

[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 comprises a second moving means, the second moving means is capable of changing the position of each slit in the same direction in any direction intersecting the direction in which the parallel lines extend.

[0034] When forming a coil bundle, if the center of the width of the parallel wires is aligned with the rotation center of a pair of discs, depending on the width of the parallel wires due to the different number of coil wires, the stranded wires can be twisted together in an orderly manner. Furthermore, when winding the parallel wires onto the reel, it is preferable to wind them in a spiral pattern with staggered positions to prevent tangling.

[0035] According to the fifth invention, even when the number of parallel wires differs, 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 in a way that prevents them from becoming tangled. This has the effect of forming a coil group of stranded wires with neatly shaped ends, and winding the coil group onto a winding frame in a neat manner.

[0036] The sixth invention of the present invention is a winding device that winds parallel wires onto a winding frame and manufactures a coil bundle of parallel wires to be inserted into a stator core, characterized in that it is equipped with the end processing means of the first to third inventions. This makes it possible to provide a winding device that facilitates the connection work of lead wires. [Effects of the Invention]

[0037] According to the first invention of the present invention, numerous lead wires are not scattered, the effort required for connecting the lead wires is reduced, and parallel wires with twisted ends can be produced with high production efficiency. According to the second invention of the present invention, the ends of parallel wires can be twisted together around a center line, which has the advantageous effect of resulting in a neatly arranged twisted wire.

[0038] According to the third invention of this invention, the power control is simple, the pair of discs are reliably synchronized, the position of one second rotational transmission gear does not change, and the insertion and removal of parallel wires into the slits is easy. According to the fourth invention of the present invention, the position where the coil wires are twisted together can be arbitrarily adjusted according to the length of the lead wire, which has the advantageous effect of providing a highly versatile end processing means.

[0039] According to the fifth invention of the present invention, stranded wires with neatly shaped ends can be used as a coil group, and the coil group can be wound onto a winding frame in a neat manner, which has the effect of being able to be wound onto a winding frame in a neat manner. According to the sixth invention of the present invention, a winding device that facilitates the connection of lead wires can be provided. [Brief explanation of the drawing]

[0040] [Figure 1] A perspective view illustrating the mechanism of the end treatment means (Example 1). [Figure 2] An explanatory diagram showing the positions where parallel wires are twisted together (Example 1). [Figure 3] A front view illustrating the first means of transport (Example 1). [Figure 4] A front view illustrating the second means of transport (Example 1). [Figure 5] A top-down diagram illustrating the winding frame that forms the winding device (Example 1). [Figure 6] Diagram 1 of the process for treating the ends of parallel wires forming a coil bundle (Example 1). [Figure 7] Diagram 2 (Example 1) of the process for treating the ends of parallel wires forming a coil bundle. [Figure 8] Another specific example of an end treatment means (Example 2). [Figure 9] Another specific example of an end treatment means (Example 3). [Modes for carrying out the invention]

[0041] Parallel wires were sandwiched between four slits, and the two inner slits were rotated in sync, causing the parallel wires to twist together between the end slit and the slits inside it.

[0042] Specifically, while parallel wires are held between the first and fourth slits located on the outside, the second and third slits provided on each of the pair of inner discs are rotated in sync by a synchronous driving means and a transmission means, causing the parallel wires between the first and second slits, and the parallel wires between the third and fourth slits, to become stranded wires. [Examples]

[0043] In Example 1, an end processing means 1 for twisting the ends of parallel wires together will be described with reference to Figures 1 to 7. Figure 1 is a perspective view illustrating the mechanism of the end processing means. In Figure 1, the second rotational transmission gear is colored to facilitate the distinction between the first and second rotational transmission gears. Figure 2 is an explanatory diagram of the cross-section at position AA in Figure 1. Figure 2(A) shows the parallel wires twisted together, and Figure 2(B) shows the parallel wires cut.

[0044] Figure 3 shows an explanatory diagram of a first moving mechanism that moves the position of the slit along the direction in which the parallel lines extend. Figure 3(A) shows an example with short lead wires, and Figure 3(B) shows an example with long lead wires. Figure 4 shows an explanatory diagram of a second moving mechanism that moves the position of the slit in a direction intersecting the direction in which the parallel lines extend.

[0045] Figure 5 shows a top view illustrating the winding frame that makes up the winding device. Figures 6 and 7 show process diagrams illustrating a series of manufacturing processes, from the parallel wire winding process to the parallel wire end processing process and the transfer to the coil insertion machine.

[0046] Example 1 describes a specific example in which the end processing means 1 is applied to a winding device 200 (see Figure 3) that manufactures a coil bundle by winding parallel wires 100 onto a winding frame. To facilitate 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. Furthermore, an example in which a group of parallel coil wires is arranged in the vertical axis direction will be described, but it goes without saying that the direction in which the group of coil wires is arranged is not limited to the vertical axis direction.

[0047] The mechanism 10 of the end processing means 1 includes four slits that form a parallel wire clamping means 20, a pair of discs 30, a synchronous drive means 40 that rotates the pair of discs in synchronous motion, a transmission means 50 that transmits rotational motion to the discs, and a coil wire cutting means 60 (see Figure 1). Furthermore, it includes a first moving means 70 and a second moving means 80 that change the position of the slits that form the clamping means (see Figures 3 and 4).

[0048] The clamping mechanism 20 consists of a first slit 21, a second slit 22, a third slit 23, and a fourth slit 24 (see Figures 1 and 2). The four slits are arranged in a straight line to facilitate insertion of the parallel wires 100. The width of each slit is narrow, corresponding to the wire diameter of a single coil wire.

[0049] The first slit 21 and the fourth slit 24 are positioned on either side of a pair of discs 30 to prevent the ends of the extending parallel wires 100 from twisting together, and they hold the parallel wires 100 between them (see Figure 1). Of the two sides of the slits formed by the first slit 21 and the fourth slit 24, one side has a long guide portion 25, and the other side has a curved tip portion 26, making it easier to insert the parallel wires 100 into the slits.

[0050] The second slit 22 and the third slit 23 are provided in a pair of discs 30, 30 positioned 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 disc 30 and extend to the outer edge. The parallel lines 100 are inserted and held in place within the slits so that their central axes align with the center of the disc 30.

[0051] Furthermore, the arrangement of the slits is not limited to being aligned in a straight line; some slits may be positioned at different angles depending on the layout of the winding device and the bobbins that store the coil wires. The spacing between the slits is also not limited; they may be spaced equally or at different intervals.

[0052] In the end processing means 1 shown in Example 1, an example is described in which the rotational motion generated by one servo motor 41 as the synchronous drive means 40 is used to synchronize a pair of discs 30, 30 arranged on the left and right sides using a mechanical motion transmission means (see Figure 1).

[0053] The synchronous drive means 40 divides the rotational motion using 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 shafts 45, 45 extending from both sides of the second timing pulley, and gears 46 attached to each shaft 45. The gears 46 mesh with gears that form the transmission means 50.

[0054] The transmission means 50 transmits the rotational motion generated by the synchronous drive means 40 to the respective disks 30, 30, causing the second slit 22 and the third slit 23 to rotate synchronously. Below, an example of using gears, which are mechanical motion transmission means, as a transmission means will be specifically described.

[0055] The transmission means 50 consists of a disc gear 31 formed on the outer circumference of each disc, a first rotational transmission gear 51 that meshes with the disc gear 31, and a second rotational transmission gear 52 (see colored area in Figure 1) that meshes with each adjacent first rotational transmission gear. The disc gear 31 is provided along the entire outer circumference of the disc 30, except for the positions of the second slit 22 and third slit 23 into which the parallel lines 100 are inserted from the side. The first rotational transmission gears 51 are distributed at five locations along the outer circumference of the disc gear 31.

[0056] The four second rotary transmission gears 52 are meshed with adjacent first rotary transmission gears 51. The rotational motion generated by the synchronous drive means 40 is first transmitted to the first rotary transmission gears 51 which are meshed with gear 46. This rotational motion of the first rotary transmission gears 51 is then transmitted to the adjacent second rotary transmission gears 52, 52 and the disc gear 31, causing the disc gear 31 and all the second rotary transmission gears 52 to rotate in one direction, while all the first rotary transmission gears 51 rotate in the opposite direction to the rotation of the disc gear 31 (see arrows in Figure 1).

[0057] Furthermore, the second rotary transmission gear 52 omits one of the five gaps formed by the adjacent first rotary transmission gears 51, located on the lower side of the disc 30. The parallel wires 100 are inserted into the second slit 22 and the third slit 23 from the lower side of the disc where the second rotary transmission gear is omitted.

[0058] The central axes of the first rotational transmission gear 51 and the second rotational transmission gear 52 are rotatably supported on a support plate (not shown) that does not come into contact with the parallel line 100. Since each of the discs 30, 30 is supported by the first rotational transmission gear 51 and the second rotational transmission gear 52, it is not necessary to support the discs themselves.

[0059] The cutting means 60 consists of scissors 61 and an air cylinder 62, with the tip of the scissors positioned between the second slit 22 and the third slit 23. The tip of the scissors 61 is open to a width that does not come into contact with the parallel wires 100 (see Figure 1). When cutting the parallel wires, the tip of the scissors 61 is closed by the air cylinder 62, cutting the parallel wires 100 that extend between the second slit 22 and the third slit 23 (Figure 2(A)).

[0060] By rotating the pair of discs 30, 30, the parallel lines between the first slit 21 and the second slit 22, and the parallel lines between the third slit 23 and the fourth slit 24 are twisted together to form a stranded wire 101. Then, by cutting the parallel line 100 between the second slit 22 and the third slit 23, the parallel line 100 is divided into a parallel line 102 with twisted ends and a parallel line 103 with twisted beginnings (Figure 2(B)).

[0061] The first moving means 70 moves the mechanism 10, which constitutes the end processing means 1, along the direction in which the parallel wires 100 extend, thereby changing the positions of the four slits 21, 22, 23, and 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 consists of a first slide plate 71 on which the mechanism 10 is mounted, a first ball screw shaft 72 extending in the direction of the first horizontal axis, a first drive motor 73 that rotates 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 Figure 3).

[0063] The first slide plate 71 has a female screw portion on the back side of the surface on which the mechanism 10 is arranged, which is screwed onto the first ball screw shaft 72, and a recess that fits onto the first rail 74. When changing the length of the lead wires, the parallel wires 100 are inserted into the four slits, and then 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 Figure 3).

[0064] The length by which the first slide plate 71 is slid can be adjusted according to the length of the lead wire. For example, the distance the slit moves can be registered in a memory means that constitutes 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 can be controlled according to the distance read by the control means that constitutes the PLC, thereby adjusting 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, but may be a known air cylinder or the like.

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

[0067] The second moving mechanism 80 consists of a second slide plate 81 on which the first moving mechanism 70 is mounted, a second ball screw shaft 82 extending in the vertical axis direction, a second drive motor 83 that rotates the second ball screw shaft around its axis, a second rail 84 extending along the side of the second ball screw shaft, and legs 85 that support these (see Figure 4). The legs 85 can be installed on the base of the winding device 200 or the like.

[0068] The second slide plate 81, like the first slide plate, is equipped with a female screw portion on its back side for screwing onto the second ball screw shaft 82 and a recess for fitting onto the second rail 84.

[0069] Here, the winding device 200 to which the present invention is applied will be briefly described with reference to the front view of the winding device shown in Figure 4 and the top view of the winding frame 201 shown in Figure 5. In Figure 5, hatching is added to a pair of winding sections for ease of understanding. Figure 5(A) shows the state before winding is started, and Figure 5(B) shows the state after winding is completed.

[0070] The winding device 200 includes a winding frame 201 for winding the parallel wires 100, a nozzle 202 for bundling multiple coil wire groups 104 and pulling the parallel wires 100 towards the other end, and a multi-joint arm 203 that allows the nozzle 202 to move in three axes (see Figure 4).

[0071] The winding frame 201 (see Figure 5) comprises a base 210, a gripping portion 211 for gripping the starting ends of parallel wires, a pair of winding portions 212 for winding the parallel wires 100 to form a coil bundle, and a spacing changing means 213 for changing the spacing between the pair of winding portions 212. The base 210 rotates along a horizontal plane around the drive shaft 214 of the servo motor (see Figure 4). The gripping portion 211, the pair of winding portions 212, and the spacing changing means 213 are provided on the lower side of the base 210, and the drive shaft 214 is provided on the upper side of the base 210 (see Figure 4).

[0072] The pair of winding sections 212 are shaped such that the parallel wires 100 form an oval shape, with the outer circumference of each winding section 212 curved in an arc shape (see Figure 5). The spacing changing means 213 can remove the parallel wires 100 from the pair of winding sections 212 by narrowing the distance between them after the winding is complete. The spacing changing means 213 can be any known ball screw shaft or the like, and its form is not limited.

[0073] The nozzle 202 pulls the coil wires 104, which have been drawn out from multiple bobbins, into the nozzle through a row of vertically aligned holes, forming a line of parallel wires 100 (see Figure 4). The ends of the parallel wires 100 extending from the nozzle 202 are pre-treated to form stranded wires 101 by an end processing means. The articulated arm 203 can be any known industrial articulated robot.

[0074] Here, referring to the process diagrams shown in Figures 6 and 7, we will explain the winding process of the parallel wire 100 (Figures 6(A) to 6(D)), the end processing process of the parallel wire (Figures 7(E) and 7(F)), and the transfer process of handing over the coil bundle formed by winding the parallel wire to the coil insertion machine (Figures 7(G) and 7(H)). Note that in each process diagram, the ball screw shaft and rail that constitute the first and second moving means have been omitted for ease of understanding.

[0075] First, the articulated arm 203 is activated to move the nozzle 202 closer to the gripping portion 211 that forms the winding frame 201, and the tip of the parallel wire 100 is gripped by the gripping portion 211 (Figure 6(A)). The nozzle 202 is moved in the first horizontal axis direction so that the parallel wire 100 pulled out from the nozzle 202 is aligned along the side of the pair of winding portions 212 (see arrow in Figure 6(B)).

[0076] From this state, the reel 201 is rotated along the horizontal plane, and the nozzle 202 is lowered, spirally winding the parallel wires 100 supplied from the nozzle onto the pair of winding sections 212 to form the coil bundle 105 (see Figure 6(C)). The reel 201 is rotated n.5 turns (where n is an integer) so that the stranded wires 101 at both ends of the coil bundle 105 are outside the blade shaft 302 that forms the coil insertion machine 300, as shown by the dashed line (see Figure 7(G)).

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

[0078] In the end processing step, first, the second moving means 80 lowers the four slits 21, 22, 23, and 24 toward the parallel wire 100, so that the parallel wire 100 is clamped by the slits (see Figure 7(E)). If the length of the lead wire needs to be adjusted, at this stage the first moving means 70 moves the positions of the four slits along the direction in which the parallel wire 100 extends.

[0079] After adjusting the positions of the four slits 21, 22, 23, and 24 to match the length of the lead wire, the pair of discs 30, 30 are rotated in synchronous motion to create stranded 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 cutting means 60 cuts between the second slit 22 and the third slit 23. After the parallel lines are cut, the second moving means 80 raises the four slits 21, 22, 23, and 24, removing the parallel lines 100 from the slits (see Figure 7(G)).

[0081] In the coil bundle transfer process, the coil insertion machine 300 is first raised by the lifting shaft 301 to align the tip position of the blade shaft 302 that makes up the coil insertion machine with the lower end position of the coil bundle 105 wound around the winding frame 201 (see Figure 7(G)). Subsequently, the spacing changing means 213 narrows the spacing between the pair of winding sections 212 to loosen the tension of the coil bundle 105.

[0082] As the tension of the coil bundle 105 is released, the coil bundle slides off the pair of winding sections 212 and is transferred to the coil insertion machine 300, where it is hooked onto the blade shaft 302 (see Figure 7(H)). Once the coil bundle is transferred, the coil insertion machine 300 is lowered by the lifting shaft 301. The process shown in Figures 6(A) to 7(H) is repeated for the number of coil bundles to be inserted into the stator core simultaneously, completing the series of processes. [Examples]

[0083] In Embodiment 2, the end processing means 2 will be described with reference to Figure 8. Figure 8 shows the end processing means 2, which includes two servo motors that rotate the disc on which the second slit and the third slit are formed, respectively, as synchronous drive means. In Embodiment 2, components identical to those in Embodiment 1 are given the same reference numerals and their description is omitted.

[0084] The end processing means 2 includes a synchronous drive means 40 which comprises two servo motors 41, 41 and a control means 47 which synchronously controls the two servo motors (see Figure 8). The rotational motion generated by each servo motor 41 is transmitted by a transmission means 50 arranged on the outer circumference of each disc 30, 30. The two servo motors are motors of the same performance.

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

[0086] In Embodiment 3, the end treatment means 3 will be described with reference to Figure 9. Figure 9 shows the end treatment means 3 in which a pair of discs are integrated. In Embodiment 3, the same components as in Embodiment 1 are denoted by the same reference numerals and their description is omitted. In the end treatment means 3, a pair of discs 32, 32 are integrated by a connecting shaft 33 that connects their opposing end faces, so that they rotate synchronously. The connecting shaft 33 is provided on the upper edge of the discs 32.

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

[0088] The leading end of the cutting means 60 is opened wider than the orbital path of the connecting shaft 33, which rotates around the central axis of the disc 32, so that it does not come into contact with the connecting shaft 33, except when cutting parallel lines 100. In addition, the scissors 61 that make up the cutting means have their cutting blades opened and closed by air cylinders 62, 62 so that the leading end can be opened wide.

[0089] When cutting the parallel wires 100, the rotation of the pair of discs 32, 32 should be stopped when they reach the opposite side of the cutting means 60, so that the connecting shaft 33 does not come into contact with the leading edge of the scissors 61, and the leading edges of the scissors should be closed to cut. Specifically, when the connecting shaft reaches the lowest position of the circular orbit, the rotation of the disc 32 should be stopped to cut the parallel wires 100. After cutting the parallel wires 100, when removing the parallel wires 100 from the slits, the disc 32 should be rotated another half turn so that the open ends of the second slit 22 and the third slit 23 face downwards, and the parallel wires should be pulled out.

[0090] (others) • In the embodiments described above, examples were given in which the transmission means were gears or rubber rollers, but the transmission means are not limited to these, and a non-contact transmission mechanism that transmits rotational motion to a pair of discs by magnetic force may also be used. In Example 1, the movement by the first moving means and the second moving means are separated, but of course, the movement directions of the first moving means and the second moving means may be combined to move in an oblique direction. In Example 1, all the slits are moved by the first moving means, but it is also possible to move only some of the slits. The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The technical scope of the present invention is indicated by the claims, not limited to the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended. [Explanation of Symbols]

[0091] 1, 2, 3... End processing means, 100... Parallel wire, 101... Stranded wire, 10... Mechanism, 20... Clamping means, 30... Disc, 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 section, 26... Curved tip section, 31...Disc gear, 32...Disc, 33...Connecting shaft 41... Servo motor, 42... First timing pulley, 43... Second timing pulley 44...Timing belt, 45...Shaft, 46...Gear, 47...Control means 51...First rotational transmission gear, 52...Second rotational transmission gear, 53... means of transmission, 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...Legs, 102, 103... Parallel wires, 104... Group of coil wires, 105... Coil bundle, 200...winding device, 201...winding frame, 202...nozzle, 203...articulated arm 210...base, 211...gripping part, 212...winding part, 213... means for changing the interval, 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 formed by a coil, The system comprises a clamping means for clamping the parallel lines, a pair of discs, a synchronous driving means, a transmission means, and a cutting means. The clamping means is a slit consisting of a first slit, a second slit, a third slit, and a fourth slit, and the slits clamp the parallel lines on which they extend. The first slit and the fourth slit hold and support the parallel lines. The second and third slits are positioned between the first and fourth slits, and each slit traverses the center of the respective disk and extends to the outer edge. The synchronous drive means causes the pair of discs to rotate in a synchronous manner, The transmission means is arranged on the outer circumference of each of the disks and transmits the rotational motion such that the parallel lines sandwiched between the second and third slits rotate around the central axis of the parallel lines. The parallel lines remain aligned in the area outward from the first slit, between the second and third slits, and outward from the fourth slit. Between the first slit and the second slit, and between the third slit and the fourth slit, the parallel wires are made into stranded wires. The cutting means is positioned between the second slit and the third slit, and by cutting the parallel wires, the cut strands on both sides become the ends of the parallel wires. End treatment means characterized by the following.

2. The clamping means, in which each of the slits is arranged in a straight line, The centerlines of the aforementioned parallel lines extend in a straight line. The end treatment means according to feature 1.

3. The transmission means comprises a disc gear formed on the outer circumference of each of the discs forming the second slit and the third slit, a plurality of first rotational transmission gears that mesh with each of the disc gears, and a plurality of second rotational transmission gears that mesh with each adjacent first rotational transmission gear. Each of the first rotational transmission gears is distributed around the disc gear, At least one second rotational transmission gear that meshes with adjacent first rotational transmission gears is omitted. The outer diameter portion of the omitted second rotational transmission gear is used as the insertion portion of the parallel line into the slit. The first rotational transmission gear and the second rotational transmission gear transmit the rotational motion generated by the synchronous drive means to rotate the pair of discs in a synchronous manner. The end treatment means according to feature 1.

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

5. Furthermore, the end processing means includes a second moving means, The second moving means allows the position of each slit to be changed in the same direction in any direction that intersects with the direction in which the parallel lines extend. The end treatment means according to any one of claims 1 to 3, characterized in that

6. A winding apparatus for manufacturing a coil bundle formed by the parallel wires, which is wound onto a winding frame and inserted into a stator core, The end processing means described in any one of claims 1 to 3 is provided, A winding device characterized by the following features.

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