JPH0750643B2 - Automatic winding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic winding machine capable of manufacturing a so-called wound resistor, a heater, etc., which is formed by winding a resistance wire around a cylindrical ceramic body. The present invention relates to an automatic winding machine that can automatically manufacture a highly accurate wire-wound resistor or heater by setting a resistance value or the like.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned wire wound resistor has a winding process of a ceramic body on a winding machine, a wire winding process by rotating a spindle, and a welding of a metal cap fixed to both ends of the body and a wire rod. Many processes such as a process and a cutting process of a wire rod are separated from each other, and each process requires a unique technique, and it is said that it is difficult to automate the process.

Under these circumstances, the accuracy of the resistance value of the wire-wound resistor to be manufactured has an error of 5 to 10%, and the manufacturing speed can be shortened by a skilled worker. Even when the work is performed, the limit is 6 to 7 pieces per minute. Therefore, conventionally, in order to meet such a demand, an automatic winding machine 65 as shown in FIG. 4 has been proposed. That is, such an automatic winding machine 65 includes a resistance wire supply mechanism 66 and a resistance wire winding mechanism 67. The resistance wire winding mechanism 67 includes a base 68 and the base 6
8 is provided with an element holding device 69 and a resistance wire welding device 70. The element body holding device 69 has a drive portion 71 provided at an end portion of the base 68, and an element body holding portion 72 driven by the drive portion 71. The element holding portion 72 includes a pair of cylindrical body holding bars 7 formed in a tubular shape.
3, 74 and an operating lever 76 capable of moving the one element holding bar 74 forward or backward via the rod 75. The element body 86 is pressed and held between the element holding bars 73, 74. The drive unit 71 can rotate the element body in the circumferential direction.

Further, the resistance wire welding device 70 is provided with a moving unit 87 and electrodes 77 and 78 provided on the moving unit 87, and the element holding member 72 holds the element body 8 therein.
When 6 is held, the rail 79 is moved forward to approach the element body 86, and the electrodes 77 and 78 are energized to weld the resistance wire 80 to the cap 81 as shown in FIG. (See JP-A-60-111402).
See) .

In such a conventional automatic winding machine 65, as shown in FIG. 6, each of the element body holding bars 73 and 74 forming the element body holding portion 72 is formed in a substantially cylindrical shape. ,
At its tip, a flat surface portion 83 that can come into contact with both ends of the element body,
83 is formed, and lead wire accommodating grooves 82, 82 are engraved in the axial direction of the element holding bars 73, 74 in a state of being opened to the peripheral surface portion from the tip end portion toward the rear. ing.

Incidentally, as shown in FIG.
Has a cylindrical insulator 85 and caps 81, 81 fixed to both ends of the insulator 85, and lead wires 84, 84 are welded to the caps 81, 81 and protruded therefrom. There is. Therefore, in such a conventional automatic winding machine 65, the element body 86 as described above is attached to the element body holding portion 72.
In order to hold the lead wires 84, 84, the lead wires 84, 84 protruding from the caps 81, 81 capped at both ends of the element body
Is stored in the lead wire storage grooves 82, 82 provided in the body holding bars 73, 74 from the circumferential direction of the body holding bars 73, 74, and in this state, the operation lever 76 is operated. One of the body holding bars 74 is brought closer to the other body holding bar 73, and the caps 81, 8 of the body 86 are
1 has flat portions 83, 83 at the tips of the element holding bars 73, 74.
Is pressed to hold the element body 86 between the element body holding bars 73, 74.

By the way, in the element body 86, due to an assembly error when fixing the caps 81, 81 to the insulator 85 or an error when welding the lead wire 84 to the cap 81, both lead wires are When the element body 86 in which the axes of 84, 84 do not coincide with each other is produced, or the axes of the lead wires 84, 84 coincide with each other, the lead wires 84, 84
In some cases, the element body 86 in which the axis of 84 and the central axis of the insulator 85 do not coincide with each other is produced.

[0008] Such an element body in which the axes of the lead wires 84 and 84 do not coincide with the central axis of the insulator 85, and the lead wire 8
When attempting to wind the resistance wire 80 on the element body in which the axes of 4, 84 do not coincide with each other by using the conventional automatic winding machine 65 as described above, there are the following problems.
That is, in such a conventional automatic winding machine 65,
As described above, the element body holding bars 73, 74 are formed in a cylindrical shape having the flat portions 83, 83 at the tips capable of contacting both ends of the element body, and the element holding pins are formed from the flat portions 83, 83 at the tips. Lead wire storage grooves 82, 8 toward the rear of 73, 74
2 is engraved and formed, so both lead wires 8
When there is a large disagreement between the axis lines of 4, 84, the lead wires 84, 84 cannot be housed in the lead wire housing grooves 82, 82, and the body body holding bars 73, 74 cause the body body 86 to move. There is a problem that it is not possible to hold and hold.

Further, the mismatch between the lead wires 84, 84 is small, and the lead wires 8 are inserted in the lead wire receiving grooves 82, 82.
Even if the element holding bars 73 and 74 for accommodating 4 and 84 can be held, if the center axis of the insulator 85 and the axis of the lead wires 84 and 84 do not match, the element body When held by the holding bars 73, 74, the body 86 and the body holding bars 73, 74 are not located on the same axis, and the body holding bars 73, 74 are rotated, 86 will rotate eccentrically and obliquely.

When the element body 86 is thus eccentrically and eccentrically rotated, when the resistance wire 80 is wound around the element body 86,
There is a problem that it is impossible to accurately wind the wire at a predetermined pitch, and it is not possible to manufacture a wire wound resistor having a predetermined resistance value. Further, in such a conventional automatic winding machine 65, the element body holding bar 7 is made by aligning the element body 86 with the axis centers of the element body holding bars 73, 74.
In order to be sandwiched between the three wires 74, it is necessary to form the lead wire housing grooves 82, 82 so that the diameter thereof matches the width of the lead wire of the element body 86. In this case, a plurality of various body holding bars must be prepared according to the size of the body and used according to the body, and the replacement work is complicated. In addition, the conventional automatic
In the winding machine 65, one of the body holding bars 74 is
Bring the other body holding bar 73 close to the
The flat parts of the tips of the body holding bars 73, 74
83, 83 are pressed against each other, and between the body holding bars 73, 74.
Because it is configured to hold the element body 86, manufacturing error
If the caps 81, 81 are deformed due to differences etc.
Is the tip of the body holding bar 73, 74 on the cap 81, 81.
The flat portions 83, 83 at the ends are not in perfect contact with each other and are incomplete.
The resistance wire 80 may be wound while being held in the state.
It was In this way, the resistance wire 80
When wound, it is driven by the drive unit 71 in the circumferential direction of the element body.
When the resistance wire is wound by rotating, the resistance wire 80
During winding, the body 86 rotates diagonally and eccentrically as described above.
And can be wound accurately with a predetermined pitch.
It means that there is no wire wound resistor with a specified resistance value.
There was a problem that it could not be manufactured.

[0011]

Therefore, the technical problem of the present invention has been made in view of such a conventional problem, and the technical problem is that in an automatic winding machine,
Element bodies in which the lead wires attached to both ends do not agree with each other in the axial direction due to manufacturing error, element body in which the axis of the lead wire and the central axis of the insulator do not match , and manufacturing error
Element body with incompletely formed cap due to
Against, the resistance wire is accurately wound at a predetermined pitch, regardless of the diameter of the lead wire of the element body,
It consists in holding an element body by a single element body holding means and winding a resistance wire.

[0012]

In order to solve such a technical problem, according to the present invention, a resistance wire is welded to a front end side cap of an element body in which caps are attached to both ends of a cylindrical insulator. In an automatic winding machine that winds a resistance wire around the insulator and welds the resistance wire to the rear end side cap to wind and fix the resistance wire around the element body to make a wire wound resistor. A nozzle mechanism for supplying a wire to an element body, a chuck mechanism for gripping the end portion of the element body, a spindle mechanism for rotating the element body gripped and fixed by the chuck mechanism with the central axis of the element body as a rotation axis, and the resistance. A welding electrode mechanism having electrodes for welding wires to caps attached to both ends of the element body, and a chuck mechanism for grasping the end portions of the element body is a pair of gripping bars arranged to face each other. The body has a body, Pressed against the cap provided on the parts,
In the case where a grip portion consisting of an opening having a tapered inner peripheral surface that contracts from the front end portion to the rear end portion, and a lead wire that is connected to the rear end of this grip portion and both ends of the body Is provided with an accommodating portion having a cavity capable of accommodating the lead wire therein.

[0013]

According to the present invention, since both end portions of the cap portion are grasped by the grasping portion composed of the opening having the tapered inner peripheral surface, the both end portions of the element body can be grasped because of the above constitution. and if the attached lead wire is fixed at a mutually mismatched state in the axial direction in part, even when the axis of the lead wire and the central axis of the insulator mismatch, calibration
The top part is formed in an imperfect shape due to manufacturing errors.
Even in such a case, the element body can be held with the chuck mechanism ensuring the axial center of the element body. Also,
Regardless of the diameter of the lead wire protruding from the element body, it can be held by a single holding means.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. 1 is a top view showing the structure of an embodiment of the present invention, FIG. 2 is a partial side view thereof, and FIG. 3 is a partially enlarged perspective view showing a chuck mechanism and a shooter mechanism. As shown in FIGS. 1 and 2, in the automatic winding machine 63 according to the present embodiment, the cap 2 is attached to both ends of a cylindrical insulator 46.
Front end cap 29 of element body 24 to which 9, 48 are attached
The resistance wire 17 is welded to the outer peripheral surface of the insulator 46.
Is wound and the resistance wire 17 is welded to the rear end side cap 48, so that the resistance wire 17 is wound around and fixed to the element body 24 to produce a winding resistor.

Then, the automatic winding machine 63 according to the present embodiment.
The spindle 37 is provided on the side plate 57 of the frame 1 toward the inside of the frame 1. Further, the rear end is connected to the pulse motor 5 through the joint 4 so that it can be rotationally driven at an arbitrary rotational speed and at an arbitrary rotational speed by a drive signal from the outside. . The rotation speed can be controlled even in a minute range of 1/200 to 1/400 rotation. This spindle 2
Is moved back and forth along the spindle axial direction by the air cylinder 7, and the element body 2 is moved between the chuck 38 and the chuck 38 described below.
4 can be held.

The chuck 38 is coaxially opposed to the rotation axis of the spindle 37 and is rotatable so that the element body 24 can be held between the chuck 38 and the spindle 37.
Further, the air cylinder 7 is fixed to the side plate 62 of the frame 1 so as to be movable back and forth in the axial direction, and the movement in the axial direction is performed by the air cylinder 7 attached and fixed to the outside of the side plate 62 via the joint portion 8.

In the present embodiment, the element body 2 described above is used.
As shown in FIG. 3, the chuck mechanism 44 for gripping the end portion of No. 4 has a pair of chucks 38 as the grip bar and the spindle 37 which are arranged so as to face each other. The chuck 38 and the spindle 37 are respectively provided with a cap 29 provided at the end of the element body 24,
The gripping portion 3 formed of an opening having a tapered inner peripheral surface 45 that is pressed against 48 and contracts from the front end portion toward the rear end portion.
9, 40 and the rear ends of the grips 39, 40,
When the lead wire 30 is projectingly provided at both ends of the element body, there are provided housing portions 41 and 42 each having a cavity capable of housing the lead wire 30 therein.

The diameter of the grips 39, 40 formed of the above-mentioned openings is formed to be larger than the diameter of the element body 24.
When the elements 9 and 40 hold the element body 24, the caps 29 and 48 of the element body 24 can be gripped on the inner peripheral surface 45. Then, as shown in FIG. 2, above the spindle 2 and above the spindle 2, a pair of welding electrodes 9 are provided on a U-shaped movable frame 10 and an air cylinder 11 respectively.
Thus, a U-shaped swinging frame 12 is similarly mounted inside the movable frame 10 so as to be rotatable in the vertical direction, coaxially with the welding electrode 9.

The swing frame 12 is joined to the movable frame 10 by a pin 47 provided at the tip of an arm 59 provided on the air cylinder 13 fixed to the side plate 57 of the frame 1. Is configured so that it can rotate at a constant angle. Further, the movable frame 10 is supported by the frame 1 via a feed screw 14 having a thread groove and a guide shaft 15, and according to the rotation of a pulse motor 16 for rotationally driving the feed screw 14, The drive frame 10 is moved along the rotation axis direction of the spindle 2 so that the position of the welding electrode 9 can be set appropriately, and a resistance wire 17 is supplied to the central portion of the swing frame 12. A nozzle mechanism section 18 is provided.

The nozzle mechanism portion 18 is provided when the resistance wire 17 is welded to the rear end cap 48 of the element body 24 and the nozzle body 50 in which the resistance wire 17 is inserted along the axial direction. When the resistance wire 17 is welded to the rear end side cap 48 of the element body 24, the nozzle main body 50 is set to a predetermined size when the resistance wire 17 is tensioned to the resistance wire 17 by pulling the resistance wire 17. And a nozzle rotating portion 58 that can be rotated at an angle.

In the present embodiment, as shown in FIG. 2, the tension applying means 64 includes a nozzle advancing / retreating drive section 51 capable of retracting the nozzle 20 in a direction away from the element body 24, and the nozzle 20. A resistance wire fixing portion 52 that can fix the resistance wire 17 inside the nozzle 20 after the retreat operation is started. Inside the nozzle body 50, a resistance wire supply groove 56 through which the resistance wire 17 is inserted is provided along the axial direction.

The nozzle advancing / retreating drive unit 51 is composed of two air cylinders 19 fixed to the back surface of the swing frame 12 in the vertical direction. These two air cylinders 19 are attached to the mounting plate of the nozzle body 50. Each of them is fixed to 60 via an arm 61. And the nozzle body 5
0 and the resistance wire fixing portion 52 are fixed to the mounting plate 60, and the nozzle body 50 and the resistance wire fixing portion 52 are separated from the element body 24 by the operation of the air cylinder 19 (see FIG. 1).
It is configured such that it can be retracted to the right with respect to the element body 24 as a reference, and can be advanced to a position where a resistance wire can be wound around the element body 24. In addition, the resistance wire fixing portion 52
Is an air cylinder 23 provided so as to project rearward of the apparatus.
And a clamp mechanism 53 driven by the air cylinder 23.

The clamp mechanism 53 is composed of an L-shaped clamp lever 21 and a shaft 22. The clamp lever 21 is rotated about the shaft 22 when the air cylinder 23 is actuated and clamped. The resistance wire 20 can be fixed inside the nozzle body 50 by pressing the resistance wire 20 against the inner surface of the resistance wire supply groove 56 by the clamp portion 55 formed at the tip of the lever 21.

The nozzle rotating portion 58 has an air cylinder 13 fixed to the side plate 57 of the frame 1, and an arm 59 for advancing and retracting by the air cylinder 13.
A pin 47 pivotally fixed to the nozzle body 50 at an intermediate portion in the longitudinal direction of the nozzle body 50, so that the nozzle body 50 can be rotated together with the swing frame 12 by a predetermined angle according to the operation of the air cylinder 13. It is configured.

The resistance wire 17 is wound on a bobbin (not shown) and is given a certain tension so that the resistance wire 17 is supplied to the nozzle mechanism portion 18 without slack. Furthermore, FIG. 1 and FIG.
As shown in, the automatic winding machine 63 according to the present embodiment is provided with a shooter mechanism 25 for supplying the element body 24 conveyed from a parts feeder (not shown) to the chuck mechanism 44.

The shooter mechanism 25 has a support portion 26 for supporting the lead wires 30, 30 protruding from both ends of the body 24, and the body 24 can be held by the chuck mechanism 44. And a drive unit 28 including an air cylinder that can be moved to a position. The support portion 26 is formed by bending an elongated plate into a U-shape in a plan view. The support portion 26 is provided at the upper edges of the front ends of the facing surface portions 32, 32 of the support portion 26 so as to project at both ends of the element body 24. Lead wire 30,
A notch 34 capable of holding 30 is provided. On both sides of the support portion 26, guides 35, 35 having upper ends opened outward and bent are provided, and the support portion 26 supports the element body 24 supplied from a parts feeder (not shown). It is configured to be easy to do.

The pulse motors 5 and 16 and the air cylinders 7, 11, 13, 19, 23 and 28 are so constructed as to be comprehensively controllable by a drive circuit section having an arithmetic control function (not shown). ing. Next, the operation of the automatic winding machine according to this embodiment will be described with reference to FIGS. First, the resistance value of the resistor to be manufactured, the element body diameter, the element body length, and the resistance value per 1 □ of the wire are set. The resistance wire 17 is inserted into the resistance wire supply groove 56 in the nozzle mechanism portion 18 and set in the automatic winding machine 63 according to this embodiment, and the number of manufactured pieces is designated. In this case, in a drive circuit unit (not shown), the rotation speed of the pulse motor 5 and the rotation speed of the pulse motor 16 are determined from the total number of windings of the resistance wire 17, and how many times the resistance wire 17 is wound around the element pair 24. Set.

After that, the U-shaped support portion 26 constituting the shooter mechanism 25 causes the element body 24 supplied from the parts feeder (not shown) to project from the lead wires 30 at both ends of the element body 24. , 30, the facing surface portions 32, 3 of the support portion 26.
It supports in the notch parts 34 and 34 provided in 2. After that, the air cylinder 28 is operated, and the chuck mechanism 44
The chuck 38 and the spindle 37, which compose the support member 26, reach the position where the element body 24 can be gripped from both ends.
And the element body 24 is conveyed.

Thereafter, as shown in FIG. 3, the air cylinders 7, 7 are actuated to move the chuck 38 and the spindle 37 forward with each other, and the tip portions formed at the tip portions of the chuck 38 and the spindle 37. To the rear end portion, gripping portions 39 and 40 each having an opening having a tapered inner peripheral surface 45 hold the element body 24 from both ends of the element body 24, respectively.

In this case, the lead wires 30, 30 projecting from both ends of the element body 24 have accommodating portions 41, 42 formed of elongated cavities continuously provided at the rear ends of the gripping portions 39, 40. Cap 2 that is housed inside and is capped at both ends of the element body 24
9 and 48 are held by the chuck 38 and the spindle 37 while being pressed against the inner peripheral surface 45 of the grips 39 and 40.

In this case, the chuck 38 and the spindle 3
7 is provided with gripping portions 39 and 40 each having an opening having a tapered inner circumferential surface 45, the gripping portion 3
The reference numerals 9 and 40 serve as a guide portion when the lead wires 30 and 30 are stored in the storage portions 41 and 42, and the lead wires 30 and 30 are smoothly stored in the storage portions 39 and 40.
In addition, when the lead wires 30, 30 are misaligned in the axial direction due to manufacturing errors or the like, or when the lead wires 30, 30
Even when the axis of the insulator 8 and the axis of the insulator 8 do not coincide with each other, the caps 29, 4 capped at both ends of the element body 24
Since the grip portions 39 and 40 are configured to grip the peripheral edge of the element 8 , the element body 24 is chucked to the chuck 38 and the spindle 38 with the axis center of the element body 24 aligned with the axis centers of the chuck 38 and the spindle 37. It can be held by 37. Also, due to manufacturing errors,
Even if the shape has been deformed, the
The chuck contacts the both end surfaces of the tops 29 and 48 and holds them.
Is not configured to have a tapered inner peripheral surface 45.
The holding portions 39 and 40 have the peripheral portions of the caps 29 and 48.
Contact, the element body 24 at the periphery of the cap 29,48 in
Because it is designed to be held, the cap shape cannot be changed.
Regardless of the shape, surely attach the element body 24 to the chuck 38 and
Hold the resistance wire 17 by holding it by the spindle 37.
You can

After that, the air cylinder 28 is moved backward, and the supporting portion 26 is returned to the initial position. At this time, the winding tip portion of the resistance wire 17 is the front end side cap 2 of the element body 24.
It is supported by the nozzle mechanism portion 18 so as to come to a position where it can come into contact with 9. Therefore, when the air cylinder 11 is actuated, the welding electrode 9 holds the front end side cap 29 with the resistance wire 17 in contact with the upper part from above and below via the resistance wire 17, and the welding electrode 9 By energizing, the winding tip of the resistance wire 17 can be welded to the upper part of the front end side cap 29.

In this case, when the resistance wire 17 is welded in parallel with the end circumferential surface of the front end side cap 29, the front end side is provided between the peripheral surface of the insulator 8 and the front end side cap 29. Since the step is formed by the thickness of the cap 29, when the resistance wire 17 is wound around the element body 24, the step is formed by the step.
When 4 passes, there is a case where an incomplete contact with the front end side cap 29 of a certain length occurs and the electric resistance of this part becomes unstable.

Therefore, at the time of welding to the front end side cap 29, the air cylinder 13 constituting the nozzle mechanism portion 18 is formed.
Is operated to rotate the swing frame 12 in the clockwise direction in FIG. 1 so that a large angle is formed between the resistance wire 17 and the end edge of the front end side cap 29. Upon completion of welding, the electrode 9 is separated from the resistance wire 17 and the front end side cap 29 by the backward movement of the air cylinder 11.

As a result, the pulse motor 16 rotates at a preset number of revolutions in the drive circuit section, and the nozzle mechanism section 1
The movable frame 10 having 8 is moved from the front end side cap 29 toward the central portion of the insulator 8 and moved to the winding start position on the insulator 8. Here, the air cylinder 13 is actuated again to contract the arm 59, whereby the swing frame 12 also rotates counterclockwise and returns to the position perpendicular to the axial direction of the element body 24.

From this state, the pulse motor 5 rotates to continuously draw out the resistance wire 17 from the nozzle 20, and
When the pulse motor 16 rotates, the movable frame 1
0 moves to the rear end side cap 48 of the element body 24, and
The resistance wire 17 is accurately wound around the insulator 8 of No. 4 by a predetermined interval and length. When the winding of the resistance wire 17 is completed, the air cylinder 13 is activated again and the arm 5
When 9 is projected, the swing frame 12 is rotated clockwise, and the winding direction of the resistance wire 17 is changed to the rear end side cap 4
Modify to form a large angle with the edge of 8.

After that, since the pulse motor 16 rotates by the number of rotations set in advance in the drive circuit section,
The resistance wire 17 rides over a step formed between the rear end cap 48 and the peripheral surface of the insulator 8, and the winding rear end of the resistance wire 17 is set at an appropriate position on the rear end cap 48. It
Next, the air cylinder 11 is operated, and the welding electrode 9 again sandwiches the rear end side cap 48 from above and below via the resistance wire 17.

Then, the tension applying means 64 is actuated to pull the resistance wire 17 toward the nozzle body 50 to apply tension to the resistance wire 17. That is, first, the two air cylinders 19 forming the nozzle advancing / retreating drive unit 51 constituting the tension applying means 64 are actuated to start retracting the nozzle 20 in the direction away from the element body 24.

Next, the air cylinder 23 constituting the resistance wire fixing portion 52 is operated to operate the clamp mechanism 53.
That is, when the clamp lever 21 rotates about the shaft 22, the clamp portion 55 connects the resistance wire 17 to the resistance wire supply groove 5.
By pressing against 6, the resistance wire 17 is fixed inside the nozzle 20. In this case, since the nozzle 20 continues to be separated from the element body 24 as described above, the resistance wire fixing portion 5 is provided.
By the operation of 2, the resistance wire 17 is pulled in the direction of the nozzle 20 and the resistance wire 17 is in a tensioned state.

When the electrode 9 is energized in this state, the resistance wire 17 is welded to the rear end side cap 48, and the nozzle 20 is further separated from the element body 24. , Is cut off on the nozzle 20 side of the welded portion, and is automatically fused. Therefore, in this embodiment, the winding and welding operation of the resistance wire 17 is completed without separately providing a cutter mechanism or the like for cutting the rear end of the resistance wire 17 wound around the element body 24 after welding. Further, as described above, in this embodiment, the nozzle 2
After starting the backward movement operation of 0, the resistance wire 17 is connected to the resistance wire fixing portion 52.
Is configured to be fixed inside the nozzle 20, and the nozzle mechanism portion 18 is configured to fix and melt the resistance wire 17 after starting to separate from the element body 24. By the movement of 18, the resistance wire 17 of a predetermined length is projected from the tip of the nozzle body 50.

Therefore, the resistance wire 17 after cutting is in a state of protruding by a predetermined length from the tip of the nozzle body 50, and the front end side cap 29 of the new element body 24 to be wound next time.
When welding to a wire, the length of the resistance wire 1 necessary for welding again
The process of sending out 7 can be omitted. In the present embodiment, the resistance value of the resistance wire 17 accurately wound and welded by the pulse motors 5 and 6 is extremely accurate, and only an error in the shape of the element body 24 remains, and the measurement accuracy is 2
%. After the fusing of the resistance wire 17 is completed, the welding electrode 9 is returned in the vertical direction by the air cylinder 11 and the pulse motor 16 is rotated in the reverse direction to return the entire movable frame 10 to the initial winding operation position. When the holding of the body 24 by the chuck 6 is released by the cylinder 7, the completed winding resistor is the spindle 2
And is dropped downward and stored in a stacker (not shown).

If the above steps are repeated by the designated number of manufactured products, the wound resistor is manufactured one after another, and no manpower is required during this. In addition, the operation is extremely efficient because it is a continuous series of operations using a pulse motor and an air cylinder, and the time required to manufacture one piece is actually over 6 seconds, which is 50% faster than the speed performed by humans. . In the present embodiment, the case where the tension applying means includes the nozzle advancing / retreating drive section 51 and the resistance wire fixing section 52 has been described as an example, but the configuration of the tension applying means is the present embodiment. It is not limited to

Further, in this embodiment, the supporting portion 2 is
The case where 6 is bent and formed by an elongated plate material has been described as an example, but the present invention is not limited to this embodiment, and it is configured so that it can support the element body 24 in which the lead wire 30 is projected. For example, it may be configured by a rod-shaped support arm. Further, in this embodiment, the lead wires 3 are provided on both ends.
The case where the resistance wire 17 is wound around the element body 24 in which 0 and 30 are projecting has been described as an example, but the present invention is not limited to this embodiment, and the configuration of the shooter mechanism is appropriately changed so that both ends are Even if the element body is not provided with the lead wires 30, 30 protruding, or the element body is provided with terminals at one end or both ends, the resistance wire 17 is wound by being held by the chuck mechanism 44 according to the present embodiment. can do.

[0044]

Since the present invention is constructed as described above, the lead wires fixed to both ends are insulated from the element body and the lead wire axis line which do not coincide with each other in the axial direction due to manufacturing errors or the like. It is possible to accurately wind the resistance wire at a predetermined pitch even on an element body whose center axis does not match. Further, when the resistance wire is wound around different types of body, even if the diameter of the lead wire of the body is different, there is no need to change the body holding means each time, always, The element body can be held by the single element body holding means to wind the resistance wire, and the work efficiency of manufacturing the wire-wound resistor machine can be improved. Also, due to manufacturing error, etc.
Is an element body with an imperfectly shaped cap
It is also possible to securely grip and wind the resistance wire.

[Brief description of drawings]

FIG. 1 is a top view showing the structure of an embodiment of an automatic winding machine according to the present invention.

FIG. 2 is a partial front view showing the structure of one embodiment of the automatic winding machine according to the present invention.

FIG. 3 is a diagram showing a chuck used in the automatic winding machine according to the present invention .
A part showing an embodiment of the structure of the feed mechanism and the feed mechanism
FIG.

FIG. 4 is a perspective view showing an example of a conventional automatic winding machine.
It

[Fig. 5] Using a conventional automatic winding machine, melt the resistance wire into the element body.
It is a partial sectional view showing the case of wearing.

FIG. 6 shows a chuck mechanism for a body of a conventional automatic winding machine.
FIG.

FIG. 7 is a perspective view generally showing a wirewound resistor.

[Explanation of symbols]

1 Frame 3 Recess 4 Joint 5 Pulse Motor 7 Air Cylinder 8 Coupling 9 Welding Electrode 10 Movable Frame 11 Air Cylinder 12 Swing Frame 13 Air Cylinder 14 Feed Screw 15 Guide Shaft 16 Pulse Motor 17 Resistance Wire 18 Nozzle Mechanism 19 Air cylinder 20 Nozzle 21 Clamp lever 22 Shaft 23 Air cylinder 24 Element body 25 Shooter mechanism 26 Support
Portion 28 Air cylinder 29 Front end side cap 30 Lead wire 32 Opposite
Surface portion 34 Notch portion 35 Guide 36 Air cylinder 37 Spindle 38 Chuck 39 Grasping
Part 40 Grip 41 Storage
Part 42 storage part 44
Mechanism 45 inner surface 46 insulation
Body 47 Pin 48 Rear end side cap 50 Nozzle body 51 Nozzle advancing / retreating drive part 52 Resistance wire fixing part 53 Clamping mechanism 55 Clamping part 56 Resistance wire supplying groove part 57 Side plate 58 Nozzle rotating part 59 Arm 60 Mounting plate 61 Arm 62 Side plate 63 Automatic Winding machine 64 Tension applying means 65 Automatic winding machine 66 Resistance
Wire supply mechanism 67 Resistance wire winding mechanism 68 Base 69 Element holding device 70 Resistance
Wire welding device 71 Drive unit 72 Element body
Holding unit 73 Holding body 74 Holding body
Holding bar 75 Rod 76 operation
Lever 77 Electrode 78 Electrode 79 Rail 80 Resistance
Line 81 Cap 82 Lee
Wire receiving groove 83 Flat portion 84 Lee
Wire 85 Insulator 86 Element 87 Moving unit

Claims (1)

[Claims] 1. A resistance wire is welded to a front end side cap of an element body having caps attached to both ends of a cylindrical insulator, the resistance wire is wound around the peripheral surface of the insulator, and the resistance line is attached to the rear end side cap. in the automatic winding machine for producing a wire-wound resistor with a resistance wire wound fixed body by welding, and the nozzle mechanism for supplying through a resistor wire inside the body, the body end A chuck mechanism for gripping a portion, a spindle mechanism for rotating the element body gripped and fixed by the chuck mechanism around a center axis of the element body, and a resistance wire for welding the resistance wire to caps attached to both ends of the element body. A welding electrode mechanism having an electrode and a chuck mechanism for gripping the end portion of the element body are opposed to each other.
Has a pair of grip bars arranged in
Is pressed against the cap provided at the end of the element body,
Equipped with a tapered inner peripheral surface that contracts from the rear to the rear end
And a gripping part consisting of an open opening, and is connected to the rear end of this gripping part.
If lead wires are protruding from both ends of the
And a storage part formed of a cavity capable of storing the lead wire inside.
An automatic winding machine characterized by being used.