JP2717434B2 - Stator coil binding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stator coil binding device that binds and binds a coil end protruding from an end face of a stator core with a thread.

"Prior art and its problems" The coils of the stator core are formed so as to form a loop through two selected grooves of the stator core. At this time, the coils are formed at portions protruding from both end faces of the stator core. The coil ends protruding from both end surfaces of the stator core are likely to come into contact with a rotor or a casing when mounted on various types of rotating machines.

Heretofore, this bundling work has been mostly performed manually using a needle, and it has taken time and labor. For this reason, there is a demand for a device that automatically performs the binding operation.

Japanese Patent Application Laid-Open No. 61-236346 discloses an example of such a binding device. This device rotates a stator core while entanglement of a yarn by an interoperation between a cord supply finger and a racing needle, thereby forming a coil. The yarn is entangled so as to wrap the end, and the lace needle is inserted again through the last loop of the yarn formed after the entanglement is completed, the yarn is hooked on the tip, and the lace needle is retracted to the last loop. The thread can be automatically tied by pulling out the thread through the thread, holding the pulled-out thread with a clamper, and further pulling the thread.

However, in the above stator coil bundling device, when the knot is formed on the yarn after the yarn has been entangled, the lace needle is inserted again through the last loop of the yarn, the yarn is hooked, and the racing needle is retracted. Since the yarn is pulled out through the last loop, the position of the knot is likely to shift when the yarn is pulled out through the last loop, and the knot is also used when the pulled out yarn is further pulled by the clamper. However, there is a problem that the last knot of the yarn is apt to be loosened because the position is easily shifted.

[Object of the Invention] An object of the present invention is to provide a binding device for a stator coil in which a yarn is entangled so as to wrap a coil end protruding from an end surface of a stator coil, and then the yarn is stiffly bound. It is in.

"Constitution of the invention" The present invention relates to a stator coil bundling device for binding a coil end projecting from an end face of a stator core with a thread, and (a) supporting the stator core and determining a racing operation position intermittently. (B) disposed in the axial direction of the center hole of the stator core,
A nozzle that moves in the axial direction of the stator core and pivots to feed the yarn from the tip, and (c) a hook that catches the thread at the tip, moves in the radial direction and the axial direction of the stator core, and A racing needle that rotates itself, (d) a clamper that moves forward and backward in the radial direction of the stator core, and a tip that opens and closes to grip the yarn; and (e) moves forward and backward toward the racing operation position. A pulling bar having a hook at the tip; (f) a cutter for cutting the thread when the thread is pulled by the pulling bar; and (g) a notch formed at the tip to tie the thread. A bushing that moves forward and backward toward a slightly outer portion of the knot and swings, and a stay is provided by the rotating operation of the rotation support means and the mutual operation of the nozzle and the racing needle. Intertwined yarns so as to wrap the coil end portion of the core, entanglement with forms the end of the loop of the thread after the completion,
With the loop held by the racing needle, insert the tip of the clamper into the loop, open the tip of the glamp and expand the loop, and in this state, with the pulling rod, between the nozzle and the loop The line of the thread located at the position is hooked and pulled, so that one line of the drawn yarn passes between the opened ends of the clamper, and the end of the clamper is closed and pulled. Gripping one line of the yarn, cutting the drawn portion of the yarn together with the cutter, retracting the clamper, drawing out the gripped yarn through the loop, and the outer portion of the knot thus formed The pusher is advanced toward, a thread is inserted into a cut portion at the tip of the pusher, and while the pusher is oscillated, the clamper is further retracted, and the knot is moved. Characterized in that so as to unite with the so that.

Thus, in the present invention, after the yarn is entangled so as to wrap the coil end of the stator core, the last loop of the yarn is held by the racing needle, and the tip of the clamper is inserted into this loop. Since the yarn is gripped and the yarn is pulled out of the loop, the position of the knot does not easily move when the knot is formed. Furthermore, when pulling the yarn with the clamper to bind the knot, the outer part of the knot is pushed with a pusher to suppress the knot, and the bush is swung to narrow the knot to the stator coil side. It can be formed harder, that is, at a position closer to the stator coil. This makes it possible to bind the coil end more firmly, reduce variations in the coil end due to loosening of the yarn, and maintain a good binding state.

"Embodiments of the Invention" Each of the drawings shows an embodiment of a stator coil bundling apparatus according to the present invention. FIG. 1 is a plan view, FIG. 2 is a front view, and FIGS. FIG. 9 to FIG. 14 are views showing a process of tying the yarn so as to wrap the coil end portion, and FIG. 9 to FIG.

Next, the structure of the binding device according to this embodiment will be described with reference to FIGS. 1, 2, and 9 to 14. FIG.

As shown in FIG. 9, a coil end 12 projecting from both end surfaces of the stator core 11 is formed. The stator core 11 is installed on the rotary table 13 with its axial direction up and down, and the intermittent rotation of the rotary table 13 allows the racing operation position to be accurately determined. And, the rotary table 13 forms a rotation support means of the stator core 11 according to the present invention.

As shown in FIG. 1, the racing needle 14 is supported by a rod 15 and a slide cylinder 16 in the radial direction of the stator core 11. The rod 15 has its base supported by a bearing 17 so that it can swing up and down.
16 is connected to the rod 15 so as to be slidable in the axial direction. The racing needle 14 is coaxially attached to the distal end of the slide cylinder 16, slides in the axial direction together with the slide cylinder 16, rotates, and swings up and down with the rod 15 and the slide cylinder 16. . A crank mechanism (not shown) is connected to a flange 18 provided on the slide cylinder 16. A cam mechanism (not shown) is connected to a flange 19 provided on the slide cylinder 16. And the slide cylinder is
The shaft 16 expands and contracts in the axial direction with respect to the rod 15, and causes the racing needle 14 to move in and out of the stator core 11 in the radial direction. In addition, the cam mechanism
The 15 and the slide cylinder 16 swing up and down around the bearing 17 so that the racing needle 14 reciprocates in the axial direction of the stator core 11. Further, with these operations, the slide cylinder 16 rotates with respect to the rod 15, and gives the racing needle 14 a repeated twisting operation.

A guide rail 20 is installed substantially along the radial direction of the stator core 11 toward the racing operation position, and an air cylinder 21 and a slider 22 are installed on the guide rail 20. The guide rail 20 is a support 23
Supported by The air cylinder 21 is fixed to the guide rail 20, and the slider 22 is connected to the operating rod of the air cylinder 21 and moves along the guide rail 20. Further, the slider 22 has a support base extending along the guide rail 20, and a two-stage telescopic air cylinder 24 is attached to the support base. A clamper 25 is slidably attached to the tip of the support table, and an operating rod of a two-stage telescopic air cylinder 24 is connected to the clamper 25. Therefore, when the slider 22 moves along the guide rail 20 by the operation of the air cylinder 21, the clamper 25 moves forward and backward toward the racing operation position. When the two-stage telescopic air cylinder 24 is pushed out, the clamper 25 is brought into a semi-clamped state by the first operation, and the clamper 25 is brought into the fully clamped state by the second operation. Further, when the two-stage telescopic air cylinder 24 is retracted, the clamper 25 is brought into a semi-clamped state by the first operation, and the clamper 25 is brought into the fully opened state by the second operation.

A support plate 27 is supported by the support column 26 substantially in the radial direction of the stator core 11 toward a racing operation position, and an air cylinder 28 is attached to a rear end of the support plate 27. The operating rod of the air cylinder 28 is extended by a shaft 29, and a pulling rod 30 is attached to a tip end thereof. Therefore, the pull bar 30 moves forward or backward toward the racing operation position by the operation of the air cylinder 28. A hook for hooking a thread is formed at the tip of the pulling bar 30. Further, a cutter 31 is attached to the tip of the support plate 27, and the cutter 31 is operated by an air cylinder 32.

A support frame 35 is attached to the columns 33 and 34,
The support frame 35 is provided with a guide rod 36 extending in the horizontal direction toward the racing operation position. A slide base 37 is mounted so as to be slidable along the guide rod 36, and the slide base 37 is supported by a support frame.
The sliding operation is performed by an air cylinder 38 attached to the rear end of the 35. Referring also to FIG. 2, vertically extending guide bars 39 and 40 are slidably inserted into the slide base 37, and an elevating block 41 is attached to the guide bars 39 and 40. The lifting block 41 is moved up and down by an air cylinder 42 attached to the slide base 37. Further, a pusher 43 is attached to the elevating block 41. The pusher 43 extends in the horizontal direction toward the racing operation position, and has a V-shaped notch 44 formed at the tip thereof. Further, a kicker 45 is rotatably attached to the tip of the pusher 43.
45 is an air cylinder 46 also mounted on the pusher 43
As a result, it rotates at a predetermined angle along the horizontal plane.

A support plate 48 is supported on the support column 47 substantially in the radial direction of the stator core 11 toward the racing operation position, and a slider 51 on which a heat cutter 50 is mounted is mounted on the support plate 48 so as to be movable forward and backward. Have been. An air cylinder 49 is attached to a rear end of the support plate 48, and a slider 51 is attached to an operating rod of the air cylinder 49. The heat cutter 50 and the slider 51 are
Move back and forth by 49. Therefore, heat cutter 50
Moves forward and backward toward the racing operation position by the operation of the air cylinder 49, and cuts the yarn by the heat source at the tip of the heat cutter 50.

Further, a nozzle 52 is arranged in the axial direction of the stator core 11, and the tip of the nozzle 52 is bent in an L-shape, from which the yarn is fed. The nozzle 52 reciprocates in the axial direction of the stator core 11 by a driving mechanism (not shown), and rotates itself.

Next, 12 binding operations by this device will be described. Note that these operations are automatically performed by a control device (not shown).

First, the operation of entanglement of the yarn so as to wrap the stator core 11 is performed by the mutual operation of the nozzle 52 and the racing needle 14 and the intermittent rotation operation of the rotary table 13.

As shown in FIG. 3, the thread 53 is stretched between the tip of the nozzle 52 and the nozzle 12 with the tip of the nozzle 52 positioned below the nozzle 12. At the start of the actual operation, the thread 53 is pulled and stretched to a predetermined position by another needle (not shown), but the details will be omitted here. In the above state, the racing needle 14 extends in the radial direction of the stator core 11, passes through the lower portion of the coil end 12, and reaches a position where it engages with the yarn 53.

As shown in FIG. 4, the racing needle 14 retracts by hooking the thread 53 on the hook at the tip thereof and pulling out the thread 53 from below the coil end 12.

As shown in FIG. 5, the racing needle 14 moves upward outside the coil end 12 while hooking the thread 53 at the tip, and pulls up the thread 53. Thereby, a loop R1 of the yarn 53 is formed. At this time, the tip of the nozzle 52 also moves upward along the axial direction of the stator core 11.

As shown in FIG. 6, the racing needle 14 is extended forward again to a position where it engages with a thread 53 stretched between the tip of the nozzle 52 and the coil end 12.

As shown in FIG. 7, the racing needle 14 hooks the yarn 53 at its tip and moves backward, pulling out the yarn 53 through the loop R1. As a result, a loop R2 is formed.

As shown in FIG. 8, the racing needle 14 moves downward outside the coil end 12 with the thread 53 hooked on its tip, and pulls the loop R2 downward. Also,
The nozzle 52 also moves downward along the axial direction of the stator core 11.

In this state, the racing needle 14 is extended forward again, and thereafter, the operation from FIG.
At the same time, by rotating the rotary table 13 intermittently and rotating the stator core 11 to determine the racing operation position, the coil end 12
The yarn 53 can be entangled so as to wrap the whole in a mesh.

Next, an operation of tying the yarn 53 after the tying operation of the yarn 53 is completed will be described.

As shown in FIG. 9, when the entanglement operation of the yarn 53 is completed, a final loop Rf of the yarn 53 is formed. This loop Rf is held by the racing needle 14.

As shown in FIG. 10, the clamper 25 advances in this state, and its tip is inserted into the loop Rf. This operation is performed by the pushing operation of the air cylinder 21 in FIG. At this time, the clamper 25 is in a closed state. At the same time, the pulling bar 30 is extended toward the racing operation position and reaches a position where the pulling bar 30 engages with the thread 53 stretched between the tip of the nozzle 52 and the coil end portion 12. This operation is performed by the pushing operation of the air cylinder 28 in FIG.

As shown in FIG. 11, the tip of the clamper 25 is fully opened, and the loop Rf is expanded. This operation is performed by retracting the two-stage telescopic air cylinder 24 in FIG. 1 into two stages. Following this, the pulling bar 30 is retracted, hooking the thread 53 on the hook at the tip, and pulling forward. At this time, one of the lines of the drawn yarn 53, more precisely, the portion stretched between the drawing rod 30 and the coil end 12 passes between the opened clampers 25. This operation is performed by the retracting operation of the air cylinder 28 in FIG. Then, although not shown, the clamper 25 is brought into a semi-clamped state by the first pushing operation of the two-stage telescopic air cylinder 24. Further, the cutter 31 shown in FIG.
The portion between the drawing bar 30 of 53 and the coil end 12 is cut off.

As shown in FIG. 12, the clamper 25 is retracted, and at the same time, the second pushing operation of the two-stage telescopic air cylinder 24 is performed.
The clamper 25 is fully clamped, grips the yarn 53, and pulls out the gripped yarn 53 through the loop Rf. At this time, the thread 53 gripped by the clamper 25 has been cut as described above, and the end thereof is also pulled out through the loop Rf. During these operations, the loop Rf is held while being hooked on the tip of the racing needle 14.

As shown in FIG. 13, the pusher 43 advances toward the slightly outer portion of the knot, and a loop Rf
The thread 53 pulled out is inserted. Clinging, thread
The knot 53 (loop Rf) is suppressed by the pusher 43, and its position is regulated. This operation is performed by the movement of the slide base 37 by the operation of the air cylinder 38 in FIG.

As shown in FIG. 14, the kicker 45 pivots and removes the loop Rf supported by the racing needle 14,
Remove the loop Rf from the racing needle 14. This operation is performed by the operation of the air cylinder 46 in FIG. In this state, the clamper 25 is further retracted by the operation of the air cylinder 21 in FIG. 1 to pull the yarn 53, and the pusher 43 is swung up and down by the operation of the air cylinder 42 in FIG. ) And bind tightly. After the knot is tied in this way, the heat cutter 50 moves forward by the operation of the air cylinder 49 in FIG. 1, and cuts off the extra end of the thread 53 slightly outside the knot.

In this way, the coil end 12 of the stator core 11 is
After being entangled so as to be wrapped by 53, the thread 53 can be bound. Therefore, almost all the binding work of the coil end portion 12 can be performed automatically, and work efficiency can be improved. Further, since the knot of the yarn 53 can be tightly bound at a position close to the coil end portion 12, there is no fear that the yarn 53 will be loosened later.

[Effects of the Invention] As described above, according to the present invention, after the yarn is entangled so as to wrap the coil end of the stator core, the last loop of the yarn is held by the racing needle,
Since the tip of the clamper is inserted into the loop, the thread is gripped by the clamper, and the thread is pulled out of the loop, the position of the knot does not easily move when the knot is formed. In addition, when pulling the yarn with a clamper to bind the knot, the outer part of the knot is pushed with a pusher to suppress the knot, and the pusher is rocked to narrow the knot to the stator coil side. It can be formed harder, that is, at a position closer to the stator coil. This makes it possible to bind the coil end more firmly, reduce variations in the coil end due to loosening of the yarn, and maintain a good binding state.

[Brief description of the drawings]

1 is a plan view showing an embodiment of a stator coil bundling apparatus according to the present invention, FIG. 2 is a front view of the same apparatus, FIG.
4, 5, 6, 7, and 8 are explanatory diagrams sequentially showing the operation of entanglement of a yarn with a stator coil by the same device, FIGS. 9, 10, 10, and 11, respectively. FIGS. 12, 13, and 14 are perspective views sequentially showing a yarn binding operation by the same device. In the figure, 11 is a stator core, 12 is a coil end, 13 is a rotary table, 14 is a racing needle, 25 is a clamper, 30 is a drawing rod, 31 is a cutter, 43 is a pusher, 44 is a cut,
45 is a kicker, 52 is a nozzle, and 53 is a thread.

Claims (1)

(57) [Claims] 1. A bundling device for a stator coil, wherein a coil end projecting from an end face of a stator core is bound with a thread and bound, wherein: (a) an intermittent rotating operation to support a stator core and determine a racing operation position; (B) a nozzle which is arranged in the axial direction of the center hole of the stator core, moves in the axial direction of the stator core and rotates, and feeds out the yarn from the front end; and (c) the yarn is drawn to the front end. A racing needle that has a hook portion that engages, moves in the radial and axial directions of the stator core, and rotates itself; and (d) moves forward and backward in the radial direction of the stator core.
A clamper for gripping the yarn by opening and closing the tip; (e) a pulling bar having a hook formed at the tip thereof which moves forward and backward toward the racing operation position; A cutter for cutting the thread when pulled, and (g) a pusher having a notch formed at the tip and moving forward and backward toward a slightly outer portion of the knot when tying the thread, and having a swinging action. The yarn is entangled so as to wrap the coil end of the stator core by the rotating operation of the rotation support means and the mutual operation of the nozzle and the racing needle, and the last loop of the yarn is formed after the entanglement is completed. Then, with this loop held by the racing needle,
Insert the tip of the clamper into the loop, open the tip of the clamper and expand the loop, and in this state, pull the yarn portion located between the nozzle and the loop with the pulling rod to pull it. At this time, one line of the drawn yarn is passed between the opened ends of the clamper, and the front end of the clamper is closed to grip one line of the drawn yarn, and the yarn is moved therewith. The drawn portion is cut by the cutter, the clamper is retracted, the gripped thread is pulled out through the loop, and the pusher is advanced toward the outer portion of the knot thus formed. A thread is inserted into the cut portion, and while the pusher is oscillated, the clamper is further retracted to bind the knot so as to squeeze the knot. The device for binding Takoiru.