JP2877918B2 - Cylinder internal surface winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical inner surface winding device for forming a winding in an annular groove formed in an inner surface of a cylindrical body such as a rotor for a rotary transformer.

2. Description of the Related Art Conventionally, as a method of forming a winding in an annular groove formed on an inner surface of a cylindrical body, a wire is wound in advance outside, and the wires wound by a method such as self-fusion are fixed to each other. In addition, a forming method has been adopted in which a winding is formed by shaping, and the winding is deformed, inserted into a cylindrical body, and then shaped again in an annular groove. However, this method has problems that productivity is poor and quality is unstable due to the large number of steps.

Therefore, the present applicant previously disclosed in Japanese Patent Application Laid-Open No. 61-100911, a wire rod was drawn out from a supply nozzle into an annular groove to which an adhesive was previously applied, wound and provided in the rotation direction rear of the supply nozzle. A method of bonding the wire to the groove bottom with a pressure roller was proposed.

However, even in this method, if the adhesive adheres to the pressure contact roller, there is a risk that the wound wire may be wound up, and the end treatment must be performed in a separate process after the adhesive is cured. Therefore, the present applicant then wraps the end of the wire to the connection pin and processes the wire, and by winding the wire in the annular groove in a series of operations with this end processing, the winding without the adhesive is performed. Suggested how to do.

SUMMARY OF THE INVENTION However, in a winding device that implements the above-described winding method, like a winding device that only winds a wire, it is configured to apply a constant tension to the wire. In addition, since a tension device with constant operating characteristics was used, it was not possible to accurately follow complicated and delicate operations when end processing and winding were performed in a series of operations, resulting in slack in a wire rod, etc. However, there is a problem that winding may not be performed properly.

In addition, it is necessary to perform rotational positioning of the cylindrical body in order to perform the end processing of the wire rod. For this purpose, the cylindrical body is pressed against the protruding holding base and rotated by pressing the positioning protrusion, thereby forming the cylindrical body. The axial groove for edge treatment was engaged with the positioning projections for positioning. However, the cylindrical body was scratched or chipped, the positioning projections were severely worn, and the positioning became unstable. There was a problem.

Furthermore, since the inspection after winding is performed in a separate process using visual inspection or an inspection gauge, there is a problem that the production efficiency is poor.

In view of the above problems, the present invention can appropriately perform winding without causing sagging of a wire in a series of steps of end processing and winding, and performs a series of steps from positioning of a cylindrical body to inspection. It is an object of the present invention to provide a cylindrical internal surface winding device that can be automatically performed by using the above method.

Means for Solving the Problems In order to solve the above-mentioned problems, a cylindrical internal surface winding device of the present invention comprises an annular groove of a cylindrical body having an annular groove and an axial groove intersecting the annular groove formed on the inner surface. A cylindrical inner surface winding device that winds a wire therein, a positioning means for positioning a rotational position of the cylindrical body, a wire feed nozzle that rotates along the annular groove, and a wire rod at a position behind the nozzle that feeds the wire into the annular groove. A winding means having a roller pressed against the bottom surface, a tension means capable of switching a tension mechanism according to a situation during the winding operation, and an inspection means for determining whether the winding state is good or not. I do.

Preferably, the positioning means comprises means for rotating the cylinder about its axis and means for detecting the axial groove in a non-contact manner.

Further, the tension means includes means for giving a drawing resistance to the wire, wire pressing means provided in the middle of the wire feeding path, and a wire feeding path extending at a wire outlet side position from the wire pressing means. Wire rod urging means for urging the wire sideways, means for operating the wire pinching means and wire rod urging means according to the situation during the winding operation, and means for applying pull-out resistance to the wire rod And a rod that has bending elasticity or is oscillatingly urged and the supply wire is engaged with the distal end portion,
It is preferable that the apparatus includes a holding means for holding an appropriate portion of the rod and a means for operating the holding means according to the situation during the winding operation.

Preferably, the inspection means includes a means for detecting whether or not the windings protrude from the annular groove in a non-contact manner.

Operation The present invention can automatically perform the positioning, winding, and inspection of the rotational position of the cylindrical body in a series of steps by the above-described configuration, and can perform the winding of the wire and the end processing in the winding process. Suitable tension can be applied to the wire, and even if end processing and winding are performed in a series of steps, the wire can be properly wound without sagging or the like.

Further, by using a means for detecting the axial groove in a non-contact manner as the positioning means, stable positioning can be achieved without causing damage or chipping of the cylindrical body or the like.

Further, in addition to the means for providing the pullout resistance as the tension means, the wire rod holding means and the biasing means for biasing the wire sideways are used so that the wire rod becomes slack in the transition process from the end processing to the winding. By operating at the time of proper movement, the slack can be reliably prevented, and an appropriate winding state can be obtained. Similarly, by using a rod capable of absorbing a large change in the wire supply amount and a holding means for stopping the function thereof, an end processing step which needs to absorb a large change in the wire supply amount and stability of tension are required. By operating each in the winding process, an appropriate winding state can be obtained.

Further, by providing an inspection means for inspecting the winding state in a non-contact manner, an automatic inspection can be efficiently performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, the overall schematic configuration will be described with reference to FIG. Reference numeral 1 denotes a core of a rotor for a rotary transformer as a cylindrical body on which an inner surface is to be wound, and is carried in by a carry-in conveyor 2a. The loaded core 1 is supplied to the positioning unit 4 by the supply chuck 3, and the rotation position of the core 1 is positioned. When the positioning is completed, it is supplied to the winding stage 5 by the supply chuck 3. In this winding stage 5, a wire 6
The winding is performed on the inner surface of the core 1 by the winding head 8 having the supply nozzle 7 and the rolling roller unit 9 to form a coil. After the winding, the core 1 is inspected by the inspection unit 11 attached to the discharge chuck 10 to determine whether the formed coil is good or defective. After the inspection, the core 1 is discharged to the discharge conveyor 2b by the discharge chuck 10. 12 is a transfer robot that moves and pivots the supply chuck 3 and the unloading chuck 10, 13 is an XYZ table that moves and drives the winding head 7, 14 is a bobbin that supplies the wire 6, and 15 is a tension device that applies tension to the wire 6 It is.

Next, the positioning section 4 will be described with reference to FIGS. The positioning unit 4 is configured to be rotatable about the axis thereof by a driving motor 16 via a timing belt 17 by a driving motor 16, and a core chuck 18 that is opened and closed with a moving operation of the taper member 19. Is configured to clamp the core 1 to determine the rotational position. 20
Is a solenoid that moves the taper member 19, 21 is a spring that biases the core chuck in the closing direction, and 22 is a core chuck 18
The roller is attached to the engaging portion with the tapered member 19. A non-contact detector 23 such as a reflection type optical sensor for detecting an axial groove 1b formed on the inner periphery of the core 1 is disposed below the inner periphery of the core 1.

Thus, when the core 1 is rotated around its axis and the axial groove 1b is detected by the non-contact detector 23, the drive motor 16 is immediately stopped, and the solenoid 20 is operated so that the core 1 is moved by the core chuck 18. Clamp. Thus, the rotational position of the axial groove 1b of the core 1 is determined.

Next, referring to FIGS. 4 to 6, the mutual relation between the winding head 8 and the rolling roller unit 9 in the winding stage 5 will be described. The winding head 8 is provided with a holder 24 for holding the end of the wire 6 and a cutter 25 for cutting the wire 6 in addition to the supply nozzle 7. The core 1 is held on the base side of the winding stage 5. Chucking 26 and core 1 held
A rolling roller portion 9 having a pressure roller 27 for pressing the wire 6 against the bottom surface of the annular groove 1a, and a hook pin 28 for locking the wire 6 in the axial groove 1b of the core 1 are provided.

The winding operation is performed by holding the leading end of the wire 6 with the holder 24, rotating the supply nozzle 7 around the connection pin 1c of the core 1, and wrapping the supply nozzle 7 along the axial groove 1b. And then stopped by overrunning from the intersection with the annular groove 1a and stopping the wire 6 at the tip of the supply nozzle 7 with the hook pin 28 as shown in FIG. After retreating the supply nozzle 7 so that the tip thereof corresponds to the annular groove 1a, the supply nozzle 7 is moved so as to rotate along the annular groove 1a, and as shown in FIG. The drawn wire 6 is formed into an annular groove 1a by a pressing roller 27.
To form a predetermined number of turns in the annular groove 1a. Then, after the supply nozzle 7 is pulled out along the axial groove 1b, it is wrapped around another connecting pin 1c, the wire 6 is held by the holder 24, and then the extra wire extending from the connecting pin 1c by the cutter 25. The winding is completed by cutting 6.

Next, a tension device 15 for applying a predetermined tension to the wire 6 during the winding operation will be described with reference to FIG. The wire 6 pulled out from the bobbin 14 is pulled through a wire guide 29 by a rotation resistance due to magnetism or the like to give a pull-out resistance to the wire 6 to apply tension to the wire 6.
After being wound around 30, it has bending elasticity in the direction perpendicular to the axis,
A rod 31 for applying tension to the wire 6 by elastic force due to bending
Is guided to the line guide 32 at the tip of the. Also, this rod 31
A clamp device 33 for holding and fixing the distal end of the rod 31 is provided so that the tension applying function of the rod 31 can be stopped as necessary. The wire 6 is further supplied from the wire guide 32 to the supply nozzle 7 via the wire guide 34, the back tension device 35, and the wire guide 36. The back tension device 35 includes a stopper cylinder 38 for holding and fixing the wire 6 between the wire member 6 and the fixing member 37,
In the state in which the wire 6 is fixed, a tension cylinder 29 for applying a back tension to the wire 6 by pressing and bending the wire 6 from a state shown by a broken line to a state shown by a solid line at a position on the lead-out side thereof is provided.

According to the tension device 15 having the above-described configuration, in the end processing step of wrapping the wire 6 on the connection pin 1c and inserting the wire 6 into the core 1 along the axial groove 1b, the tension by the tension roller 30 and the rod 31 is used. By acting, the large change in the supply speed of the wire 6 can be absorbed by the expansion and contraction of the supply path of the wire 6 due to the elastic deformation of the rod 31, and a substantially constant tension can be maintained. When the supply nozzle 7 is stopped at a position where the annular groove 1a is overrun in the axial groove 1b and the wire 6 is locked by the hook pin 28, the stopper cylinder 38 of the back tension device 35 is operated to operate the wire 6
After the supply nozzle 7 is returned to a position corresponding to the annular groove 1a while the tension cylinder 29 is operated and a large back tension is applied to the wire 6, the annular groove is fixed.
By moving the wire 6 along the line 1a, the wire 6 can be prevented from loosening or loosening, and the wire 6 can be securely locked to the axial groove 1b and the edge of the annular groove 1a. Can be prevented from falling off from the annular groove 1a.
The tension setting at this time can be arbitrarily set by adjusting the stroke amount and the pushing pressure of the tension cylinder 39. Next, the wire 6 is inserted into the annular groove 1a.
When the winding process starts, the operation of the back tension device 35 is stopped, the distal end of the rod 31 is clamped by the clamp device 33, and the operation of the rod 31 is stopped. Is eliminated, the wire 6 is supplied in a state where a stable tension is applied by the tension roller 30.

Next, the inspection unit 11 will be described with reference to FIGS. When the winding is completed, the discharge chuck 10 moves toward the winding stage 5, and the inspection unit 11 includes a non-contact detector 41 such as a reflection type optical sensor attached to the discharge chuck 10.
Are positioned above the core 1 and determine non-defective / defective windings in a non-contact manner. In the case of a good product with proper winding,
As shown in FIG. 9, the coil does not protrude inside the inner peripheral surface of the core 1, and in the case of a defective product, the coil 40 protrudes inside the inner peripheral surface of the core 1 as shown in FIG. Therefore, it is detected by the non-contact detector 41. At the time of this detection, the core 1 is driven to rotate around the axis.

Also, if the coil falls off due to disconnection during winding,
As shown in FIG. 8, the coil 44 that has fallen off the pressing roller 27 of the rolling roller unit 9 remains, so that the non-contact detector 42 can detect this. further,
When the wire 6 breaks during winding, the rod 31 in FIG. 7 returns to a natural state as shown by a virtual line. Therefore, a detector 43 such as a microswitch for detecting this is provided. can do.

Effects of the Invention As described above, according to the cylindrical internal surface winding device of the present invention,
Positioning, winding, and inspection of the rotational position of the cylindrical body can be automatically performed in a series of steps, and in the winding step, appropriate tension is applied to the wire during winding and end processing of the wire. Even if the end treatment and the winding are performed in a series of steps, the wire can be wound properly without sagging or the like.

Further, by using a means for detecting the axial groove in a non-contact manner as the positioning means, stable positioning can be achieved without causing damage or chipping of the cylindrical body or the like.

Further, in addition to the means for providing the pullout resistance as the tension means, the wire rod holding means and the biasing means for biasing the wire sideways are used so that the wire rod becomes slack in the transition process from the end processing to the winding. By operating at the time of proper movement, the slack can be reliably prevented, and by using a rod capable of absorbing a large fluctuation of the wire supply amount and a holding means for stopping its function, a large fluctuation of the wire supply amount is absorbed. Appropriate winding condition can be obtained by operating each of the necessary end treatment step and the winding step where tension stability is required.

Further, by providing an inspection means for inspecting the winding state in a non-contact manner, it is possible to obtain an effect that an automatic inspection can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a core winding device according to an embodiment of the present invention, FIG. 2 is a perspective view of a positioning section, FIG. 3 is a plan view of the main part, and FIG. FIG. 5 is a perspective view showing a schematic configuration, FIG.
FIG. 7 is a perspective view showing the structure of the tension device, FIG. 8 is a perspective view showing the state of the inspection process, FIG. 9 is a plan view of a non-defective product, and FIG. 10 is a plan view of a defective product. DESCRIPTION OF SYMBOLS 1 ... Core (cylindrical body) 1a ... Annular groove 1b ... Axial groove 4 ... Positioning part 5 ... Winding stage 6 ... Wire rod 7 ... Supply nozzle 8 ... Winding head 11 ... Inspection part 15 Tension device 16 Drive motor 18 Core chuck 23 Non-contact detector 27 Pressure contact roller 30 Tension roller 31 Rod 33 Clamp device 35 Back tension device 37 Fixing member 38 Stopper cylinder 39 Tension cylinder 41 Non-contact detector.

Continued on the front page (72) Inventor Masataka Tokunaga 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-10814 (JP, A) (58) Fields investigated (Int .Cl. ⁶ , DB name) H01F 23/00, 41/04, 41/06

Claims (5)

(57) [Claims] 1. A cylindrical internal surface winding device for winding a wire into an annular groove of a cylindrical body having an inner surface formed with an annular groove and an axial groove intersecting the annular groove. Positioning means for positioning, winding means having a wire supply nozzle rotating along the annular groove and a roller for pressing the wire against the bottom surface of the annular groove at a position behind the winding means, and tension depending on the situation during winding operation Tension means capable of switching mechanisms,
A cylindrical inner surface winding device, comprising: inspection means for determining whether the winding state is good or bad. 2. A winding device according to claim 1, wherein the positioning means comprises means for rotating the cylindrical body around its axis and means for detecting the axial groove in a non-contact manner. . 3. A tensioning means for applying pull-out resistance to the wire, a wire pinching means provided in the middle of the wire feeding path, and a wire feeding path extending from the wire pinching means at a position on the wire outlet side. The apparatus according to claim 1, further comprising a wire urging means for urging the wire to the side so as to cause the wire rod pressing means and the wire rod urging means to be operated according to a situation during the winding operation. 2. The cylindrical internal surface winding device according to 1. 4. A tension means for applying pull-out resistance to a wire, a rod having bending elasticity or being oscillatingly urged and having a leading end engaged with a supply wire, and clamping an appropriate portion of the rod. 2. The cylindrical inner surface winding device according to claim 1, further comprising: a holding means, and a means for operating the holding means according to a situation during the winding operation. 5. An apparatus according to claim 1, wherein said inspection means comprises means for detecting in a non-contact manner whether or not the winding projects from the inside of the annular groove.