JP3365145B2 - Winding device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to the winding equipment for winding a winding wire for the axis for the wire.

[0002]

2. Description of the Related Art In recent years, as automated continuous production of cathode ray tubes (CRTs) has progressed, it has been required to improve the quality of cathode heater filaments used in electron guns thereof.
There is a tendency to demand a high speed manufacturing process of the winding used for the cathode heater filament.

As an example, a cathode heater filament for heating a cathode that emits electrons in a CRT is manufactured as follows. First, as shown in FIG.
A molybdenum (Mo) wire with a diameter of 0.12 mm is used for the shaft center wire rod 1
The winding wire 12 made of rhenium-tungsten wire having a diameter of 0.05 mm is wound around it. Here, the winding wire 12 is a densely wound portion 13 wound at a fine pitch,
The coarse winding portion 14 wound at a coarse pitch, the short dense winding portion 15, and the coarse winding portion 14 are cyclically repeated in this order. As an example, the winding pitch P1 of the close-wound portion 13 is 0.094 mm.
It is ± 0.005 mm, and the coarse winding portion 14 is about 15 times the close winding pitch.

In winding the winding wire 12 around the shaft wire 11, in order to obtain good quality of the cathode heater filament, 1) the winding wire 12 should be wound around the shaft wire 11 without any gap. 2) Winding wire 1
In No. 2, it is necessary to have strict requirements such that the electrical resistance value does not change due to winding and that the electrical resistance value is not stretched by excessive tension.

After that, cleaning and annealing are performed on both the wires 11 and 12 at a temperature at which there is no change due to heat, so that the cathode heater filament primary winding 16 is manufactured.

Next, the primary winding 16 is cut at the center of the short close-wound portion 15, and the winding material 1 for the cathode heater filament is cut.
7 (FIG. 8). The winding material 17 has a dense winding portion 13 at the center, coarse winding portions 14 located on both sides thereof, and a dense winding portion 15 having a half length at both ends.

FIG. 9 is a front view of a finished cathode heater filament. The winding material 17 cut out to a predetermined length is twisted and wound into a shape close to the shape of the finished product of the heater filament 18 for cathode as shown in FIG. 9, and the close winding portion 15 with a short end is cut off. Next, the winding material 17 is subjected to a treatment of high alumina coating 19 and heat treatment. After that, using a specific acid, the wire rod for the shaft center (molybdenum) 11
Is melted and only the winding wire (rhenium tungsten) 12 wound into a coil is left, and the heater filament 18 for the cathode is completed.

As described above, in the winding 16 used for the cathode heater filament, portions of the winding wire 12 wound with a fine pitch and portions with a coarse pitch appear alternately and periodically. Therefore, in the winding device that winds the winding wire 12 around the shaft wire 11, the relationship between the feeding speed of the shaft wire 11 and the winding speed of the winding wire 12 is changed in order to change the winding pitch. It is necessary to change the timing.

Conventionally, in this type of winding device, in order to prevent the winding wire rod 12 from loosening due to a change in speed, a bobbin supplying the winding wire rod 12 is brought into direct contact with a bobbin to rotate the bobbin. Applying a load, thereby winding wire 12
Gives tension to.

[0010]

Conventionally, a winding wire 12 is used.
When applying tension to the bobbin, the leaf spring is brought into direct contact with the bobbin.
It was difficult to use a large capacity bobbin for the bobbin and to perform the winding work at high speed. That is, a large-capacity bobbin with a large amount of winding has a large inertia, and when the bobbin is rotated at a high speed, even if the rotation of the bobbin is controlled by a leaf spring in order to adjust the tension of the winding wire 12, This cannot be sufficiently performed, and the winding wire rod 12 is broken during acceleration, or conversely, slack occurs during deceleration, resulting in a gap between the shaft center wire rod 11 and the winding wire rod 12, which is required. It was not possible to secure the accuracy that was given.

Therefore, conventionally, the capacity of the bobbin for supplying the winding wire 12 cannot be increased and the rotation speed thereof is also limited. Furthermore, since the bobbin has a small capacity and the winding wire 12 is consumed in a short time, the winding device must be frequently stopped to replace the bobbin, and a lot of man-hours are required for bobbin replacement setup. This is also an obstacle to improving the efficiency of winding work.

The present invention has been made in view of the above problems, and a winding such as a cathode heater filament winding in which the winding pitch of a winding wire material is repeatedly and periodically changed. It is an object of the present invention to provide a winding device which is capable of increasing the speed of winding work and continuously operating for a long time.

[0013]

[0014]

A winding device according to the present invention which achieves the above-mentioned object is a winding device for winding a winding wire on a shaft wire, wherein the shaft wire is provided with a predetermined wire passage. Feeding means for traveling along, a bobbin for supplying a winding wire, and a winding means for winding the winding wire supplied from the bobbin around the traveling axis wire, A tensioner that applies a predetermined tension to the winding wire supplied from a bobbin, a rotating member that mounts the bobbin, the winding means, and the tensioner to rotate around the wire passage path, and the feeding means. A tensioner for changing the winding pitch of the winding wire with respect to the axis wire by changing the feeding speed of the axis wire and the rotation speed of the rotating member according to a predetermined relationship.
Is a torque control device that applies a predetermined rotational load to the bobbin.
And suppressing rotation of the bobbin with respect to the rotating member.
Apply a tension to the braking device and the winding wire.
And a back tension applying device .

Preferably, the brake device is the winding device.
Release the brake when the wire tension increases
It is characterized by

Preferably , the back tension is provided.
The feeding device engages with the winding wire and
Guy supported movably in the direction parallel to the rotation axis of the member
And the guide in one direction to urge the winding wire
And a back tension spring for applying tension .

[0017]

When the relationship between the feeding speed of the wire for shaft center and the winding speed of the wire for winding is changed in order to change the winding pitch of the wire for winding, the tension of the wire for winding changes. The tensioner acts to keep the tension of the winding wire at a predetermined level, and maintains the winding work in a constant state even when the winding pitch is changed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. This embodiment is configured as a winding device for manufacturing a winding used for a cathode heater filament of a CRT, and uses the method for manufacturing a cathode heater filament winding according to the present invention.

FIG. 1 is a perspective view of a winding device according to an embodiment of the present invention. As shown in FIG. 1, the winding device 21 is
A feeding device 22 which is a feeding means for running the shaft center wire 11 along a predetermined wire passage, a bobbin 23 for supplying the winding wire 12, and a predetermined tension to the winding wire 12. It has a tensioner 24 and a fryer winding device 25 which is a winding means for winding the winding wire 12 around the shaft center wire 11.

The feeding device 22 supplies the wire rod 11 for the shaft center.
Supply roller (not shown) and take-up roller 2
6 and the shaft center wire 11 is wound by the winding roller 26 so that the shaft center wire 11 travels along a predetermined route. The take-up roller 26 is rotatably driven by an actuator 27 composed of, for example, a pulse motor, and the rotational speed of the take-up roller 26 can be accurately adjusted by controlling the actuator 27 by a controller (not shown).

The bobbin 23, the tensioner 24, and the winding device 25 are arranged so that the shaft wire 11 can be rotated around the wire passage 11 formed between the supply roller and the take-up roller 26. Is provided.

As shown in FIG. 2, which is a longitudinal sectional view of the main part,
A hollow main shaft 30 is rotatably supported on the bearing base 28 via a bearing 29, and a hollow nozzle 31 is detachably fixed to the tip end of the main shaft 30 by taper fitting. The shaft center wire 11 supplied from the supply roller is inserted into the hollow portions of the main shaft 30 and the nozzle 31, and the shaft center wire 11 exits from the nozzle tip 32 provided at the tip of the nozzle 31.

A hollow brake drum 33 having a flange is supported on the outer periphery of the main shaft 30 via a bearing 34 so as to be rotatable concentrically with the rotating shaft of the main shaft 30, and a fixed plate 35 is attached to the brake drum 33. The gear 36, the sleeve shaft 37, and the bobbin 23 are fixed. That is, the brake drum 33, the gear 36, and the bobbin 23 are fixed to each other and integrated, and are rotatably supported by the main shaft 30.

As shown in FIG. 1, a drive pulley 38 is fixed to the main shaft 30, and a timing belt 39 is wound around the drive pulley 38. The timing belt 39 is connected to an actuator (not shown) that is, for example, a pulse motor, and the main shaft 30 is rotationally driven via the timing belt 39 by driving the actuator. This actuator is controlled by a control device (not shown) like the above-mentioned actuator 27, and the rotational speed of the main shaft 30 can be accurately adjusted in synchronization with the winding roller 26.

By these actuators and control devices, the rotational speeds of the winding roller 26 and the main shaft 30 are changed in a predetermined relationship, and the winding wire 1 for the shaft center wire 11 is wound.
A means for changing the winding pitch of 2 is configured. Although the main shaft 30 and the winding roller 26 are electrically synchronized in this embodiment, they may be mechanically synchronized by using a gear or the like.

As shown in FIG. 2, the rotary member 4 is attached to the main shaft 30.
1 is fixed. A constant torque imparting device 42 that generates a constant rotational load is fixed to the rotating member 41, and a torque transmission gear 44 fixed to a rotation shaft 43 of the constant torque imparting device 42 meshes with the above-described gear 36 to form a torque control device. I am configuring.

The constant torque applying device 42 is, for example, the rotary shaft 4
3 is a magnetic force line type torque controller in which permanent magnets are arranged on both sides of a hysteresis plate connected to the rotary shaft 43.
A constant rotation load torque is always applied to the rotation of. This torque is transmitted to the bobbin 23 after being adjusted to a required size by appropriately selecting the gear ratio of the torque transmission gear 44 and the gear 36, and a predetermined load is applied to the rotation of the bobbin 23 with respect to the main shaft 30 (rotating member 41). Torque will always act.

The constant torque applying device 42 applies a rotational load torque to the bobbin 23 so that the tension of the winding wire 12 does not fall below a specified value even when a brake, which will be described later, is released. However, the magnetic force line type torque controller is not necessarily limited to the above. As long as a constant torque can be applied even if the tension changes, a mechanical friction type torque controller or the like can also be used.

As shown in FIG. 3, which shows a cross-sectional view of the main part,
Brake drum 33 fixed to bobbin 23
A brake shoe 51 is attached to the outer peripheral surface of the, and a brake belt 52 is wound around the brake shoe 51 to form a brake device. One end of the brake belt 52 is fixed to a pin 53 standing on the rotating member 41, and the other end of the brake belt 52 is fixed to a pin 55 standing on a brake ring 54.

The brake ring 54 is an annular plate member, and is rotatably fitted in an annular groove formed in the rotating member 41 concentrically with the rotating shaft, as shown in FIG. As shown in FIG. 3, the spring post 5 is attached to the brake ring 54.
6 is erected, a spring post 57 is erected on the rotating member 41 outside the brake ring 54, and a brake spring 58 is stretched between both spring posts 56, 57. The brake ring 54 is urged in the counterclockwise direction in FIG. 3 by the spring force of the brake spring 58 with respect to the rotating member 41.

When the brake ring 54 is rotated counterclockwise by the brake spring 58, the brake ring 5 is rotated.
The brake belt 52, one end of which is fixed to 4, is pulled, the brake shoe 51 is pressed against the brake drum 33, and the rotation of the bobbin 23 is braked. When the brake ring 54 is rotated in the clockwise direction against the spring force of the brake spring 58, the brake belt 52 is loosened and the brake is released.

A stopper arm 59 is fixed to the brake ring 54 as shown in FIG.
1, the stopper pin 60 is fixed, and the brake ring 54
Stopper arm 59 when is rotated counterclockwise.
Contacts the stopper pin 60 and restricts the rotation of the brake ring 54.

In the normal state, when the brake ring 54 is rotated counterclockwise by the brake spring 58, the brake belt 52 moves the brake belt 52.
The rotation of the brake ring 54 is restricted by tightening No. 1, and the stopper arm 59 is not in contact with the stopper pin 60. When some abnormality such as damage to the brake belt 52 occurs, the stopper arm 59 contacts the stopper pin 60 to prevent the brake ring 54 from excessively rotating.

As shown in FIGS. 3 and 4, which is a view taken along the line IV in FIG. 3, an operating arm 61 is fixed to the brake ring 54. The operating arm 61 extends in the radial direction so that the tip thereof reaches the outer edge portion of the rotating member 41, and the pulley post 6 is attached to the tip portion.
2 is fixed. The pulley post 62 extends in a direction parallel to the rotation axis of the main shaft 30, and a tension pulley 63 is rotatably attached to the tip of the pulley post 62.

Further, two pulley posts 64, 65 parallel to the pulley post 62 are erected side by side on the rotating member 41, and an introduction pulley 66 and a final pulley 67 rotate at the tips of the pulley posts 64, 65, respectively. It is attached freely. Here, the introducing pulley 66 is located between the tension pulley 63 and the final pulley 67, and the tension pulley 63 causes the introducing pulley 66 and the final pulley 67 by the spring force of the brake spring 58.
The positional relationship is such that they are separated from each other. still,
Winding wire 12 via a snail guide 71 described later.
The rotation axis of the final pulley 67 is inclined by 45 degrees with respect to the other pulleys 63 and 66 because of the passage of the wire.

A back tension applying device is provided at the pulley post 64 of the introduction pulley 66. FIG. 5 showing a view from the direction of arrow V in FIG. 3 and FIG. 6 showing a side view of FIG.
As shown in FIG.
And two guide bars 68 parallel to the rotation axis of the main shaft 30 are fixed to the rotation member 41.
A slider 69 is slidably attached to. A back tension spring 70 is wound around each guide bar 68, and the slider 69 is biased toward the rotating member 41 by the back tension spring 70. A guide that engages with the winding wire 12, for example, a snail guide 71 made of a material having a small frictional resistance, such as ceramics, is fixed to the slider 69.

Here, the winding wire 12 wound around the bobbin 23 is first hung on the introduction pulley 66, then hung on the tension pulley 63 and folded back there, and is inserted into the snail guide 71 to be passed through the final pulley 67. Really
A path is set so as to be guided to the nozzle tip 32 from there.

These torque control device, braking device,
A tensioner 24 that applies a predetermined tension to the winding wire 12 is configured by the back tension applying device.

As shown in FIG. 7, a holding block 81 is rotatably fitted to the tip of the nozzle 31. The tip of a fixing pin 83, which is detachably fixed to a column 82 provided upright on the rotating member 41, fits into a positioning hole of the holding block 81, whereby the holding block 81 is rotated.
Rotate with.

A winding guide 84 extending ahead of the nozzle tip 32 is fixed to the holding block 81. A flat surface 85 is formed at the tip of the winding guide 84.
Is brought into contact with the axial center wire rod 11 extending from the nozzle tip 32. The winding device 25 is configured by these.

Further, as shown in FIG. 7, a balance weight 86 is fixed to the rotary member 41 to balance the weight of various parts mounted on the rotary member 41.

In such an apparatus, the shaft center wire 11
The work of winding the winding wire 12 around the wire is performed as follows. First, as a preparatory work, a feeding device 2 for the wire rod 11 for the axis
The shaft core wire 11, for example, a molybdenum wire having a diameter of 0.12 mm is pulled out from the supply roller 2 (not shown),
0, the tip of the shaft center wire 11 is wound around the winding roller 26 of the feeding device 22 through the hollow portion of the nozzle 31 and fixed.

Next, the winding wire 12, for example, a rhenium tungsten wire having a diameter of 0.05 mm is drawn out from the bobbin 23 and is wound around the introduction pulley 66, the tension pulley 63, the snail guide 71, and the final pulley 67 in this order, and the tip end is the axis center. The winding wire rod 12 is wound several times around the winding wire rod 11, and the winding wire rod 12 is sandwiched between the shaft center wire rod 11 and the flat surface 85 of the winding guide 84. Up to this point, it is done manually.

Next, the winding roller 26 is rotated by the actuator 27 to wind up the shaft center wire 11, thereby feeding the shaft center wire 11 and starting the feeding of the shaft center wire 11. In synchronization with this, the rotating member 41 is rotated via the main shaft 30 by an actuator (not shown). Then, the winding wire 12 is wound around the shaft center wire 11 by the rotation of the rotating member 41 which is interlocked with the traveling of the shaft center wire 11. A wire rod 11 for an axis around which a wire rod 12 for winding is wound
Is taken up by the take-up roller 26 as it is.

Since the winding wire 12 is wound around the shaft center wire 11 the same number of times as the rotating member 41 is rotated, the winding wire 12 is always rotated while the rotating member 41 is rotating. Continue to be pulled out. However, at the start of rotation, the brake spring 58 causes the brake ring 5 to
4 rotates counterclockwise in FIG. 3, whereby the brake shoe 51 clamps the brake drum 33.
Therefore, the bobbin 23 cannot rotate with respect to the rotating member 41, and the winding wire 12 is not supplied from the bobbin 23.

Therefore, the back tension spring 70 is initially used.
By moving the slider 69 against the spring force, the winding wire path is shortened and the winding wire 12 is supplied. As the slider 69 moves, the back tension spring 70 is compressed and the spring force gradually increases, and the tension of the winding wire rod 12 increases.

The tension of the winding wire 12 acts to rotate the brake ring 54 in the clockwise direction in FIG. 3 via the tension pulley 63, and this direction is the direction to release the brake. Therefore, the brake is gradually released as the tension of the winding wire rod 12 increases, and when the tension of the winding wire rod 12 exceeds a certain value, the brake spring 58 is overcome and the brake is completely released. The bobbin 23 rotates to supply the winding wire 12.

Even when the brake is released, the bobbin 2
Since a constant torque is applied to the coil 3 by the constant torque applying device 42, the bobbin 23 idles and the winding wire 12
Does not occur such that the winding wire rod 12 sags due to excessive supply of the.

On the other hand, when the bobbin 23 rotates and the winding wire 12 is supplied, the tension decreases, but the decrease in tension reduces the force for rotating the brake ring 54 in the clockwise direction in FIG. As a result, the braking force is increased to limit the rotation of the bobbin 23 and reduce the supply of the winding wire 12. As a result, the tension of the winding wire rod 12 converges to an equilibrium state in a short time, and thereafter the winding wire rod 12 is stably supplied.

Here, since the movable portion of the back tension applying device, that is, the slider 69 and the snail guide 71 , which functions to absorb the tension in accordance with the variation of the tension of the winding wire 12, that is, the slider 69 and the snail guide 71, is light in weight and small in inertia.
It is possible to sensitively follow sharp changes in the tension of the winding wire 12.

Further, the slider 69 and the snail guide 71
Is supported so as to move along a direction parallel to the rotation axis of the main shaft 30, so that it is less susceptible to the centrifugal force caused by the rotation of the rotation member 41. This prevents the tension of the winding wire rod 12 from being influenced by the number of rotations of the rotating member 41 and complicating the adjustment of the tension when the rotating member 41 is rotated at a high speed.

If the winding wire 12 is broken during the winding operation, the tension is lost, and the brake spring 58 rotates the brake ring 54 to apply a brake, and the bobbin 23 is immediately stopped. It

When the winding work is finished, the shaft center wire 1
1 and the winding wire 12 are manually cut at appropriate positions to finish.

The densely wound portions 13 and 15 and the coarsely wound portion 14 of the cathode heater filament primary winding 16 shown in FIG. 8 rotate and wind the winding roller 26 which controls the feeding speed of the wire rod 11 for the axis. It is formed by changing the rotation of the rotating member 41 that controls the winding speed of the reusing wire 12 according to a predetermined relationship. This is performed, for example, by increasing or decreasing the rotation speed of the take-up roller 26 in proportion to the pitches of the close winding portions 13, 15 and the rough winding portion 14 and keeping the rotation speed of the rotating member 41 constant.

Even when the rotation of the rotating member 41 is kept constant, the rotation speed of the winding roller 26 (the wire rod 1 for the shaft center)
The amount of consumption of the winding wire 12 changes in accordance with an increase / decrease in the feeding speed 1), and the tension of the winding wire 12 sharply changes each time. In this winding device 21, the tensioner 24 sensitively absorbs the fluctuation of the tension, and the winding wire 12 can be wound around the shaft center wire 11 at a high speed at a proper tension.

According to the winding device 21, the winding work can be performed at a high speed using a large capacity bobbin. According to an example, a large-capacity bobbin having a bobbin diameter of 55 mm (more than 7,000 m) is used, and the rotation speed of the rotating member 41 is 6000 r / mi.
n, a proper winding work can be performed at a high feed rate of 9.4 mm / sec for the wire rod 11 for the shaft center, which is 10 to 20 times faster than the conventional speed. Further, while the conventional bobbin has a bobbin diameter of about 25 mm (600 m winding), it is possible to use a large-capacity bobbin whose winding length of the winding wire rod 12 exceeds 10 times.

In the above example, molybdenum is used as the shaft center wire 11, but the shaft center wire of the cathode heater filament winding is not limited to this. In addition to this, for example, a material having a faster melting rate than tungsten of the winding wire 12 may be used as the shaft center wire 11.

[0058]

As described above in detail with reference to the embodiments, according to the present invention, the winding pitch of the winding wire material is changed repeatedly like the cathode heater filament winding. When the wire is manufactured, the tension of the wire for winding is controlled to be constant, so it is possible to speed up the winding work and to work continuously for a long time using a large capacity bobbin. It is possible to efficiently produce a heater filament winding for a cathode.

[Brief description of drawings]

FIG. 1 is a perspective view of a winding device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a main part of the embodiment.

FIG. 3 is a transverse cross-sectional view of the main part of the embodiment.

FIG. 4 is a view on arrow IV in FIG.

FIG. 5 is a view on arrow V in FIG.

FIG. 6 is a side view of the back tension applying device of FIG.

FIG. 7 is a plan view of a main part of the embodiment.

FIG. 8 is a front view of a heater filament primary winding for a cathode.

FIG. 9 is a front view of a finished heater filament for a cathode.

[Explanation of symbols]

11 Wire rod for shaft center 12 winding wire 13 close winding section 14 Coarse winding part 15 short tight-wound section 16 Cathode heater filament primary winding 19 High alumina coating 21 Winding device 22 Feeding device 23 Bobbin 24 Tensioner 25 flyer winding device 26 Take-up roller 27 Actuator 30 spindles 31 nozzles 32 nozzle tip 33 brake drum 36 gears 38 Drive pulley 39 Timing belt 41 Rotating member 42 Constant torque applying device 44 torque transmission gear 51 brake shoes 52 Brake belt 54 brake ring 58 Brake spring 61 Working arm 63 Tension pulley 66 Introduction pulley 67 Final Pulley 68 Guide bar 69 slider 70 Back tension spring 71 Snail Guide 84 Winding guide 86 Balance weight

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01J 9/08 H01J 9/10 B65H 81/08 B65H 59/36

Claims (3)

(57) [Claims] 1. A winding device for winding a winding wire around an axial wire, the feeding means for running the axial wire along a predetermined wire path, and a bobbin for supplying the winding wire. A winding means for winding the winding wire supplied from the bobbin around the running axial wire, and a tensioner for giving a predetermined tension to the winding wire supplied from the bobbin, A rotating member that mounts the bobbin, the winding means, and the tensioner and rotates about the wire passage path; a feeding speed of the shaft center wire rod by the feeding means and a rotation speed of the rotating member are predetermined. And a means for changing the winding pitch of the winding wire with respect to the shaft center wire , the tensioner applying a predetermined rotational load to the bobbin.
And a blur that suppresses the rotation of the bobbin with respect to the rotating member.
Device and back tension for applying tension to the winding wire
Winding apparatus characterized by comprising a providing device. Wherein said braking device, a winding device according to claim 1, wherein the tension of the winding wire for releases the becomes larger brakes. 3. The back tension applying device engages with the winding wire and is movably supported in a direction parallel to a rotation axis of the rotating member, and the guide is attached in one direction. energized to the winding apparatus according to claim 1, characterized in that it has a back tension spring gives tension to the wire for the winding.