JPH0590015A - Automatic resistance-wire winding machine - Google Patents

Abstract

PURPOSE:To automate the winding operation of a resistance wire on a body which forms a wire-wound resistor to enhance the manufacturing efficiency of the wire-wound resistor and to properly and easily wind various kinds of resistance wires whose rigidity is different. CONSTITUTION:The title machine is provided with the following: a body-holding part 2; a body rotation means 3; a resistance-wire feed part 4 which feeds a resistance wire 13 to a body 10; a spiral winding means 5 which winds the resistance wire on the raw body 10 spirally; and a welding means 6 which welds the resistance wire 13 to terminal caps 11a, 11b. It is provided with a lead-length change mechanism 430 which is composed of a lead-length change mechanism mounting plate 431, a lead-length change rod 432 and a pinch part 433 in order to change the interval between the raw body 10 and the resistance- wire feed part 4. The length of a lead is changed according to the rigidity of the resistance wire 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to winding of a resistance wire performed when manufacturing a winding resistor, and more particularly to an automatic resistance wire winding machine for automatically winding the resistance wire.

[0002]

2. Description of the Related Art Generally, many so-called wound resistors are used in various electronic devices and electronic circuits built in VTRs. FIG. 10 is a schematic perspective view of a wound resistor. As shown in FIG. 10, the winding resistor 1 includes a small-sized ceramic element body 10 formed in a cylindrical shape,
Terminal caps 11a, which are capped at both ends of the element body 10,
11b, lead wires 12a and 12b projecting from the terminal caps 11a and 11b to the side ends of the terminal caps 11a and 11b along the axis of rotation of the element body, and both ends are welded to the terminal caps 12a and 12b. In this state, the resistance wire 13 is spirally wound on the peripheral surface of the element body 10.

Conventionally, when the resistance wire 13 is wound around such a wound resistor 1, the element body 10 forming the wound resistor 1 is fixed to a device having an appropriate chuck mechanism, The resistance wire 13 is wound and fixed around the peripheral surface of the element body 10 by hand while moving the element body 10 along the length direction while rotating the chuck mechanism that fixes the body 10.

[0004]

By the way, in the case of winding the resistance wire around the element body in this way, the tip of the resistance wire is welded to one of the terminal caps mounted on both ends of the element body. Start winding and then cut the rear end of the resistance wire while welding it to the other terminal cap, so the work of winding and fixing the resistance wire around the element body is extremely complicated, and the manufacturing efficiency of the winding resistor is extremely high. It was very low.

Further, since different types of resistors use different types of resistance wires, therefore, resistance wires having different rigidity must be properly wound around the element body. Here, after welding the tip of the resistance wire to the terminal cap and when starting to bend and wind the resistance wire, if the length of the resistance wire from the rear end of the resistance wire fixed by hand to the welding point at the tip is short, , There was a case where the resistance wire was bent or damaged. Therefore, skillfully winding the resistance wire according to the rigidity of the resistance wire requires skill and there is a problem that it is not efficient.

Therefore, the technical problem of the present invention is to improve the manufacturing efficiency of the winding resistor by automating the work of winding the resistance wire around the element forming the winding resistor.
The point is that various resistance wires having different rigidity can be preferably and easily wound.

[0007]

In order to solve such a technical problem, the resistance wire automatic winding machine according to claim 1 of the present application has a pair of terminal caps attached to both ends thereof. And a resistance wire so that the resistance wire is wound around the rotating element body. For moving the resistance wire supply part for supplying the element body to the element body and one of the element body or the resistance wire supply portion in the direction of the center line of the element body so that the resistance wire is wound around the element body in a spiral shape. A spiral winding means, and a welding means for welding the front end of the resistance wire supplied by the resistance wire supply portion and the rear end of the wound resistance wire to each of the pair of terminal caps,
In order to make it possible to change the lead length, which is the length of the resistance wire of the portion exposed from the tip of the resistance wire supply section toward the element body, depending on the rigidity of the resistance wire to be wound, the element body and the resistance wire It is provided with a lead length changing mechanism for changing the distance from the supply unit.

[0008]

Embodiments of the invention of the present application will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view of an automatic resistance wire winding machine according to this embodiment. An automatic resistance wire winding machine schematically shown in FIG. 1 mainly includes an element body holding portion 2 that holds an element body 10,
Element body rotating means 3 for rotating the element body 10 around the center line of the element body 10, and a resistor for supplying the resistance wire 13 to the element body 10 so that the resistance wire 13 is wound around the rotating element body 10. The wire supply unit 4 and one of the element body 10 and the resistance wire supply unit 4 are moved in the direction of the center line of the element body to make the element body 10
The spiral winding means 5 for spirally winding the resistance wire 13 around the resistance wire 13, the tip of the resistance wire 13 supplied by the resistance wire supply unit 4 and the rear end of the wound resistance wire 13 are formed into a body. The welding means 6 is welded to each of the pair of terminal caps at both ends of the lead wire 10, and the lead length changing mechanism 430 is used to change the distance between the element body 10 and the resistance wire supply portion 4.

First, the structure of a main frame which entirely supports the automatic resistance wire winding machine will be described with reference to FIG.
This automatic resistance wire winding machine is placed on a frame (not shown). The entire machine is provided with a main frame bottom plate 91 placed horizontally on the frame, and two main frame side plates 9 that are vertically fixed to both ends of the main frame bottom plate 91.
It is supported by a main frame composed of 2, 92.

The two opposing main frame side plates 92,
On the inner side of 92, two moving frame guide rods 51 are vertically installed. The element body 10 wound by this resistance wire automatic winding machine is almost the same as the conventional one shown in FIG. That is, as shown in FIG. 10, the element body 10 is a columnar body formed of an insulator such as ceramics, and a pair of terminal caps 11a and 11b are capped at both ends thereof.

The pair of terminal caps 11a and 11b are cylindrical caps made of a conductive material such as aluminum. Each terminal cap has a lead wire 12
a and 12b are fixed by welding or the like, and the lead wires 12a and 12b extend from the terminal caps 11a and 11b to the outside in the length direction of the element body. The cylindrical element body 10 is arranged in a posture in which the length direction thereof is oriented in the horizontal direction. Then, the resistance wire 13 is wound while rotating around the center line of the element body by the element body rotating means 3 described later. Needless to say, the direction of the center line of the element body 10 is equal to the length direction of the element body 10, and in the following description,
The direction of the center line of the element body 10, which is the rotation axis, is called the element body rotation axis direction.

The element body 10 is transported in the horizontal direction perpendicular to the axis of rotation of the element body while being supported by an element body supply arm, which will be described later, and is supplied to the winding position. Therefore, the side on which the element is transferred and supplied is referred to as the "front side". Further, the resistance wire is supplied to the element body 10 from the side opposite to the front side with the winding position sandwiched, in a direction perpendicular to the element body rotation axis direction. Therefore, the supply side of this resistance wire is called the "rear side". Further, in the following description, “left side” means the left side when the winding position is viewed from the front side, and “right side” means
Similarly, it means the right side when the winding position is seen from the front side.

Next, the element supply mechanism for supplying the element 10 to the winding position of the resistance wire will be described with reference to FIG.
An element body supply arm holding plate 71 is fixed to the front ends of the two main frame side plates 92, 92. The element body supply arm holding plate 71 includes main frame side plates 92, 9
2, two main frame side plates 92, which project to the front side,
It has a horizontal arch-like shape that is laterally bridged at 92.

A guide rail portion (not shown) is provided on the lower surface of the central portion of the element body supply arm holding plate 71, and the element body supply arm 72 is arranged while being slidably held by the guide rail portion. Has been done. An element supply air cylinder 73 that drives the element supply arm 72 is arranged on the upper surface of the element supply arm holding plate 71.
The element body supply air cylinder 73 moves the element body supply arm 72 supporting the element body 10 so as to approach or separate from the winding position.

The element body supply arm 72 is an element body supply arm 7.
A plate-shaped arm main body 721 slidably held by two guide rails, and two arm tip portions 7 provided at the tips of the arm main bodies 721 and 21 via two swing shaft rods 722.
23 and two element body supply rods 72 fixed to the tip of the arm tip 723 in a state of protruding in parallel toward the winding position.
4 and.

Then, the arm swinging drive source 725 built in the arm body 721 causes the arm tip 723 to move.
Oscillates vertically with the oscillating shaft rod 722 as an axis, so that the element body supply rod 724 also oscillates vertically. The element body supply rod 724 protruding in the horizontal direction has a step portion provided on the way and has a shape that is lowered one step from the way. The front half of the step portion extends obliquely upward. Therefore, as shown in FIG. 1, the element body 10 is locked at the corners below the step portion.

The operation of the element body supply arm 72 will be described. The unwound element bodies 10 are sequentially sent to the element body supply arm 72 one by one from an element body pool (not shown) in which a large number of element bodies 10 are pooled by an element body feeder (not shown). The element body supply arm 72 that has received the element body 10 is retracted to a predetermined retracted position away from the winding position.

Then, the body supply air cylinder 73 is driven to support the body 10 and the body supply arm 72.
Is moved toward the winding position. And body 1
When 0 reaches the winding position, the movement is stopped. That is, the stroke of the piston of the element body supply air cylinder 73 is set so that the element body 10 just stops at the winding position.

In this way, when the element body 10 is supplied to the winding position, the element body holding portion 2 to be described later operates and the element body 10 is moved.
Hold and move to the winding operation.

Next, the structure of the body holding portion 2 in this automatic resistance wire winding machine will be described with reference to FIGS. 1, 2 and 3. FIG. 2 is a partial cross-sectional view for explaining a holding structure of the element body 10 by the element body holding portion 2 of the resistance wire automatic winding machine of FIG. 1. FIG. 3 is a plan sectional view for explaining the overall configuration of the element holding unit of the automatic resistance wire winding machine of FIG.

The holding structure of the element body 10 is schematically shown in FIG. That is, the element body holding part 2 in this automatic resistance wire winding machine is provided with a pair of hollow element-holding tubes 21 and 21 such as straws, and each of the element body holding tubes 2 is provided.
1 and 21 are arranged so that their open ends face each other.
The element body 10 is held by inserting the 0 lead wires 12a and 12b into the inside from the open ends. Therefore, the element body holding cylinders 21 and 21 are connected to the lead wires 12a and 12b.
It will be in a state where it is enclosed inside.

The straw-shaped element body holding cylinder 21,
The inner diameter of 21 gradually increases toward the open end into which the lead wires 12a and 12b enter. Therefore,
As will be described later, when the element holding cylinders 21 and 21 approach each other and clamp both ends of the element body 10, the lead wires 12a and 12
b can smoothly enter the inside from the opening end.

Next, the overall structure of the element body holding portion 2 will be described with reference to FIGS. 1 and 3. Element body holding portions 2 to be described below are entirely fixed to the above-described main frame side plates 92, 92 which are provided upright at both ends of the main frame bottom plate 91 shown in FIG. Since the structure of the element holding unit 2 is bilaterally symmetrical with respect to the winding position, the following description focuses on the structure on one side.

First, a circular hole is provided in the main frame side plate 92, which is erected at the side end of the main frame bottom plate 91, and the cylindrical casing 24 is fitted and fixed in this hole. A cylindrical spindle 22 is loosely fitted inside the casing 24, and a bearing member 25 that allows rotation and linear movement of the spindle 22 is interposed in a gap between the spindle 22 and the casing 24. There is.

Then, as shown in FIG. 3, the element holding cylinder 21 is fixed to the tip end surface of the spindle 22 and horizontally protrudes toward the winding position, while the other element holding cylinder 21. It is facing the open end of.
An output shaft of a body rotating motor 3 as a body rotating means is connected to the rear end surface of the spindle 22. As a result, the spindle 2 is rotated in the casing 24 by driving the body rotating motor 3 as the body rotating means.
2 rotates, whereby the element body 10 held by the element body holding cylinder 21 rotates.

When holding the element body, the element body holding cylinder 21 is in a state in which the element body 10 is sandwiched between the terminal caps 11a and 11b at both ends together with the other element body holding cylinder 21. Since the mechanism for rotating the element body described above is also provided on the side of the other element body holding cylinder 21, the element body 10 held by the pair of element body holding cylinders 21 and 21 is Two
According to the rotations of 1 and 21, they are simultaneously rotated by the frictional force.

The body rotating motor 3 as the body rotating means for causing the above-mentioned rotation is attached while being held by the rotating means holding plate 31 in a vertical posture. The rotating means holding plate 31 is provided with four guide holes at diagonally opposite positions of the square. On the other hand, the main frame side plate 9
One end of four support / guide rods 25 is fixed to 2 and extends horizontally outward. The four support / guide rods 25 are loosely fitted in the guide holes of the rotating means holding plate 31, so that the rotating means holding plate 31 is placed in a state of being suspended by the support / guide rods 25. ing. That is,
The body rotating motor 3 as the body rotating means is supported by the frame side plate 92 via the rotating means holding plate 31 and the four support / guide rods 25.

Further, the other ends of the four support / guide rods 25, one end of which is fixed to the frame side plate 92, are of the advancing / retreating means holding plate 26 arranged facing the rotating means holding plate 31 in the vertical posture. It is fixed to the front. An air cylinder holder 23 for advancing / retracting the element holding cylinder for advancing / retracting the element holding cylinder 21 is fixed to the back surface of the advancing / retreating means holding plate 26. The piston is configured to be able to project.

The piston of the air cylinder holder 23 for advancing and retracting the body holding cylinder is fixed to the back surface of the rotating means holding plate 31 suspended by the support / guide rod 25 as described above. Therefore, the air cylinder linda 2 for advancing and retracting the body holding cylinder
When 3 is driven, the piston pushes out the rotation means holding plate 31, whereby the rotation means holding plate 31 and the element body rotation means 3 advance integrally while being guided by the support and guide rod 25. As a result, the spindle 22 directly connected to the output shaft of the body rotating means 3 moves forward, and the body holding cylinder 21 also moves forward accordingly.

That is, the above four support / guide rods 25
Has a role of suspending and holding the rotating means holding plate 31 and guiding a linear movement by the air cylinder 23 for advancing and retreating the body holding cylinder arranged at the rear. The advancing / retreating mechanism as described above is also provided in the other element body holding cylinder 21 arranged to face each other. Due to the function of this advancing / retreating mechanism, the pair of element body holding cylinders 21 and 21 approach or separate from each other. To do.

Next, the operations of the element body supply arm 72 and the element body holding portion 2 will be described. When the element body supply arm 72 supplies the element body 10 to the winding position as described above, the advance / retreat mechanism of the element body holding cylinders 21 and 21 described above operates and the pair of element body holding cylinders 21 and 21 moves forward. approach. Then, as described above, the lead wires 12a and 12b extending from both ends of the element body 10 are formed.
Enters into the inside from the open ends of the tip ends of the element body holding cylinders 21 and 21. Furthermore, a pair of element holding cylinders 21, 21
Of the terminal caps 1 and 21
The element body 10 is in contact with the terminals 1a and 11b, and the element body 10 is held between the terminal caps 11a and 11b.

In this state, the two element body holding cylinders 2
The approach of 1 and 21 stops. And the body supply arm 7
The second arm tip portion 723 swings downward by the swing mechanism described above. As a result, the element body supply rod 724 is separated from the element body 10 downward. In this state, the element supply air cylinder 73 is driven in the opposite direction, whereby the element supply arm 72 starts moving in a direction away from the winding position,
Reach a predetermined retracted position. Then, the body supply arm 72
The arm tip portion 723 swings upward to assume the initial posture, and enters a standby state for supply of the next element body 10 by the element feeder.

On the other hand, the element body 10 held by the element body holding cylinders 21 and 21 is wound by being supplied with a resistance wire as described later. Next, the welding means 6, the resistance wire supply part 4, and the spiral winding means 5 in this automatic resistance wire winding machine will be described. First, the welding means 6 will be described with reference to FIGS. 1, 4 and 5.

FIG. 4 is a vertical sectional view of the welding means 6 of FIG. Note that, in FIG. 4, the illustration of the element supply mechanism, the element holding portion, and the like described above is omitted. The welding means 6 in the automatic resistance wire winding used in this embodiment performs so-called spot welding by energization. That is, the material is melted and welded by applying a large current. Therefore, the welding means 6 is composed of the cathode rod 61 and the anode rod 62. The cathode rod 61 and the anode rod 62
As shown in FIG. 4, they are arranged so as to face each other on a vertical straight line, and the upper side is a cathode rod 61 and the lower side is an anode rod 62.

The cathode rod 61 and the anode rod 62 as described above are
A cathode mounting cylinder 611 and an anode mounting cylinder 6 arranged above and below a movable frame 52 that is movable in the direction of the body rotation axis.
It is fixed via 21 respectively. Detailed structures of the cathode mounting cylinder 611 and the anode mounting cylinder 621 will be described later, and the moving frame 52 for holding the welding means 6 is described.
The moving mechanism will be described.

FIG. 5 is a view for explaining the moving mechanism of the moving frame, and is a schematic perspective view of the resistance wire winding machine of FIG. 1 seen from the rear side. However, illustration of the resistance wire supply unit 4 and the like in FIG. 1 is omitted. As shown in FIG. 5, the main frame bottom plate 9
The main frame side plates 92, 9 which are erected on both side ends of the main frame 1.
Two circular rod-shaped guide rods 51 are horizontally provided on the upper and lower sides of the unit 2.

On the other hand, the moving frame 52 is a rectangular plate having a large square hole formed in the center thereof, and is arranged so that the long side of the rectangle is oriented in the height direction. At both ends of the moving frame 52, a small square erection end plate 53 is fixed so as to project rearward from the end. This erection end plate 53 is provided with the upper and lower two guide rods 5 at each end of the moving frame 52.
A total of four pieces of two pieces are provided at the same height as the height of 1, and a circular guide hole is provided. still,
A bearing (not shown) is provided on the inner peripheral surface of the guide hole.

The guide rod 51 is fitted in the guide hole of the erection end plate 53, whereby the movable frame 52 is guided by the guide rod 51 and is slidable. Held in. Further, at a position slightly lower than the upper guide rod 51, a precision screw rod 54 for converting rotational movement into linear movement is arranged. The moving frame motor 55 is fixed to the outer surface of the upper back portion of the one main frame side plate 92. A hole for an output shaft is formed in the main frame side plates 92, 92 at a position where the moving frame motor 55 is fixed, and the output shaft of the moving frame motor 55 is internally provided through the output shaft hole. It is in a protruding state. The protruding tip of the output shaft is connected to the precision screw rod 54. As the moving frame motor 55, a motor capable of rotating in the forward and reverse directions is used.

Further, at the height position of the precision screw rod 54 on the back surface of the moving frame 52, a square screw unit holding plate 56 is fixed so as to project rearward. The screw unit holding plate 56 is provided with a circular hole, and the cylindrical screw unit 57 is arranged in a state of being fitted and fixed in the hole. In this screwing unit 57, the screw formed on the inner surface of the cylinder is screwed into the precision screw rod 54, and thereby the rotation of the precision screw rod 54 is converted into the linear movement of the moving frame 52. ..

Therefore, when the moving frame motor 55 is driven, the precision screw rod 54 connected to the output shaft of the motor 55 rotates. By this rotation, the screwing unit 57 screwed into the precision screw rod 54 linearly moves to the left or right according to the direction of rotation. As a result, the moving frame 52 moves to the left or right as a whole. This moving frame 5
By the movement of 2, the welding cathode rod 61, the anode rod 62, and the resistance wire supply unit 4 to be described later are moved leftward or rightward, that is, in the direction of the axis of rotation of the element body.

Returning to FIG. 4, the structure of the welding means 6 will be further described. First, as described above, on the front surface of the moving frame 52, two rectangular tubular electrode attachment cylinders 611 and 621 are fixed vertically. The upper side is a cathode mounting cylinder 611, and the lower side is an anode mounting cylinder 621. First, the upper cathode side will be described. Inside the cathode mounting cylinder 611 fixed to the moving frame 52, a cathode elevating air cylinder 612 is arranged and fixed. The cathode raising / lowering air cylinder 612 is fixed to the lower surface of the upper lid portion of the cathode mounting cylinder 611, and is arranged with its piston facing downward.

Inside the cathode mounting cylinder 611, below the cathode elevating air cylinder 612,
The cathode mounting upper plate 613 is arranged in a horizontal posture. The cathode mounting cylinder 611 is fixed to the tip of the piston of the cathode lifting air cylinder 612 described above. Therefore, when the piston of the cathode lifting air cylinder 612 is driven to descend, the cathode mounting upper plate 613 moves down, and when the piston of the cathode lifting air cylinder 612 is driven to move upward, the cathode mounting upper plate 613. Is rising.

Similarly, in the inside of the cathode mounting cylinder 611, at a position slightly below the cathode mounting upper plate, a cathode mounting lower plate 615 is similarly arranged in a horizontal posture. Four cathode mounting plate fixing columns 616 are vertically suspended between the cathode mounting upper plate 513 and the cathode mounting lower plate 615. The cathode rod 61 is fixed to the lower surface of the cathode mounting lower plate 615 so as to project vertically downward. The bottom plate portion of the cathode mounting cylinder 611 is provided with a hole for passing a cathode rod, and the tip of the cathode rod 61 fixed to the cathode mounting lower plate 615 passes through this hole for passing a cathode to the lower side of the cylinder. Overhangs.

An annular cathode side spacer 617 is arranged on the lower surface of the bottom plate of the cathode mounting cylinder 611, and a cathode side substrate 618 is fixed to the lower side of the cathode side spacer 617. There is. That is, the cathode mounting cylinder 611 fixed to the moving frame 52 has a structure in which the cathode side substrate 618 is held on the lower surface via the cathode side spacer 617. The cathode side substrate 618 is provided with a hole for passing a cathode similarly to the bottom plate portion of the cathode mounting cylinder 611, and the cathode rod 61 penetrates the bottom plate portion, the cathode side spacer 617 and the cathode side substrate 618. It projects downward.

Although the cathode side spacer 627 is fixed to the cathode mounting cylinder 621, the cathode mounting cylinder 6 is fixed.
It is arranged rotatably about a vertical axis while sliding on the lower surface of 21. Then, when the cathode elevating air cylinder 612 is driven as described above, the cathode rod 61 moves downward while penetrating the hole of the bottom plate portion of the cathode mounting cylinder 611, the spacer 617, and the hole of the cathode side substrate 618. Moving. Further, when the piston of the air cylinder 612 for raising and lowering the cathode is driven to rise, the cathode mounting upper plate 613, the cathode mounting plate supporting column 616 and the cathode mounting lower plate 615 integrally rise, whereby the cathode rod 61 itself. Is also rising.

Next, the structure on the lower anode side will be described. First, similarly to the cathode side, on the anode side as well, a square tubular anode mounting cylinder 621 is fixed to the lower side of the front surface of the moving frame 52. Then, this anode mounting cylinder 621
An anode elevating air cylinder 622 is mounted and fixed on the upper surface of the bottom lid part of the. This air cylinder 62 for raising and lowering the anode
2 is arranged with its piston facing upward.

Inside the anode mounting cylinder 621, the anode mounting lower plate 623 is arranged in a horizontal posture above the piston of the anode lifting air cylinder 622. The anode mounting lower plate 623 is fixed to the tip of the anode lifting air cylinder 622. Therefore, when the piston of the anode raising / lowering air cylinder 622 is driven to rise, the anode mounting lower plate 623 rises, and when the piston of the anode raising / lowering air cylinder 622 is driven to descend,
The anode mounting lower plate 623 is adapted to descend.

On the lower plate 623 for mounting the anode, four anode mounting plate supporting columns 626 are provided upright in a diagonal shape, and the anode mounting upper plate 625 is placed horizontally on the anode mounting plate supporting columns 626. It is fixed in a proper posture. The anode rod 62 is fixed to the upper surface of the above-mentioned anode mounting upper plate 625, and is arranged with its tip protruding upward.

Further, on the upper surface of the anode mounting cylinder 621,
A drive source mounting arm plate 82 for riding on the resistance wire is fixed. A ring-shaped anode side spacer 627 is arranged on the resistance wire riding drive source mounting arm plate 82. The anode side spacer 627 is provided on the anode mounting cylinder 62 through the resistance wire riding drive source mounting arm plate 82.
Although fixed to No. 1, it is rotatably arranged around a vertical axis while sliding on the upper surface of the resistance-wire-riding drive source mounting arm plate 82. Then, on the anode side spacer 627, the resistance gear riding first gear 81
Is fixed, and this resistance wire riding first gear 81
An anode-side substrate 628 is fixed on the above.

Drive source mounting arm plate 8 for riding the resistance wire
2, first gear 81 for riding the resistance wire and the substrate 62 on the anode side
8 is provided with a hole for the anode rod 62 to project upward. The anode rod 62 is arranged so as to project above the anode-side substrate 628 through these holes. As is clear from the above description, the air cylinder 622 for lifting and lowering the anode is provided.
When driven, the anode mounting lower plate 623, the anode mounting plate supporting column 626 and the anode mounting upper plate 625 are integrally lifted, whereby the anode rod 62 itself moves the resistance wire riding first gear 8.
1, the resistance wire riding drive source mounting arm plate 82 and the anode side substrate 628 are penetrated and moved upward.

When the piston of the air cylinder for raising and lowering the anode 622 is driven so as to retract, the anode mounting lower plate 623, the anode mounting plate supporting column 626, and the anode mounting upper plate 62.
5 moves down integrally, and as a result, the anode rod 62 itself moves downward. Also, the upper cathode side substrate 618
An upper support arm 43, which is long in the horizontal direction, is fixed to the lower surface of the support arm 43, and a supply nozzle unit support pillar 44 is vertically provided at the rear end of the support arm 43. The lower end of the supply nozzle unit support pillar 44 is fixed to the anode side substrate 628.

That is, the cathode side substrate 618 and the anode side substrate 628 are vertically arranged horizontally by suspending the supply nozzle unit support pillar 44, and the resistance wire supply nozzle unit 41 is disposed on the anode side substrate 628. It is fixed. And
The cathode-side substrate 618 and the anode-side substrate 628 can be integrally swung about a vertical swing shaft by the mechanism for riding the resistance wire as described below.

That is, the resistance wire riding drive source mounting arm 82 fixed so as to be sandwiched between the anode side substrate 628 and the resistance wire riding first gear 81 is located on the front side, that is, the above-mentioned element support. It extends horizontally on the side where the arm 72 is arranged. This resistance wire driving source mounting arm 82
An upper surface of a resistance wire riding drive source 83 composed of a motor, a rotary solenoid, or the like is fixed to the tip of the. That is, the resistance wire riding drive source 83 is fixed to the anode mounting cylinder 621 while being held by the resistance wire riding drive source mounting arm 82.

The output shaft of the resistance wire riding drive source 83 is directed upward, and the resistance wire riding second gear 84 is fixed to the tip of the output shaft. A transmission means 85 such as a timing belt is stretched between the second resistance wire riding gear 84 and the first resistance wire riding gear 81. Therefore, when the resistance wire riding drive source 83 is driven, the driving force is transmitted to the resistance wire riding first gear 81 via the resistance wire riding second gear 84 and the transmission means 85 to drive the resistance wire riding up. The first gear 81 rotates or swings by a predetermined angle.

As a result, the anode side substrate 628 swings.
The axis of this swing is in the vertical direction, and is set at a position slightly ahead of the vertical line along the two cathode rods 61 and anode rods 62 facing each other. In addition, the cathode side substrate 618
Is fixed to the anode side substrate 628 via the supply nozzle unit support pillar 44 as described above, and therefore the oscillation of the anode side substrate 628 also causes the cathode side substrate 618 to swing. That is, the supply nozzle unit support pillar 44, the cathode side substrate 618, and the resistance wire supply section 4 that are integrally fixed to the anode side substrate 628 swing together. The resistance wire riding drive source 83 is for rotatively driving a motor or a rotary solenoid. The riding operation of the resistance wire due to this rotation will be described later.

Next, the resistance wire supply unit 4 and the lead length changing mechanism 430 in this resistance wire automatic winding machine will be described with reference to FIGS. 1 and 6. FIG. 6 is a perspective view of the resistance wire supply unit 4 and the lead length changing mechanism 430 shown in FIG. 1 as viewed from the rear side. First, in the resistance wire supply unit 4 of this automatic resistance wire winding machine, after the tip of the resistance wire 13 is welded to, for example, one terminal cap 11a by the above-mentioned welding means 6, the element body 10 by the body rotating means 3 is used. The resistance wire 13 is wound around the peripheral surface of the element body 10 by the rotation of.

As shown in FIG. 1, the unwound resistance wire 13
Is wound around the drum-shaped resistance wire bobbin 400 in a large amount, and the resistance wire bobbin 400 is rotated only by the torque of the element body 10 which is rotated by the mechanism described above, whereby the resistance wire 13 is unwound, It is wrapped around the body 10. The component in the supply path of the resistance wire 13 is
The description will be given from the order closer to the winding position. First, on the rear side of the winding position, a resistance wire supply nozzle unit 41 for supplying the resistance wire 13 at a right angle and a horizontal direction with respect to the element body rotation axis direction is arranged.

The resistance wire supply nozzle unit 4
In the rear of 1, there is arranged a third guide pulley 42 which is rotatably supported by a rotary shaft in the direction of the body rotary shaft. As is apparent from FIG. 6, the third guide pulley 42 includes the nozzle unit mounting plate 4 that constitutes the resistance wire supply nozzle unit 41.
It is supported by a third pulley support rod 422 fixed to the rear end surface of the shaft 11.

A second guide pulley 402, which is rotatably supported by a rotary shaft in a horizontal direction at a right angle to the rotary shaft direction of the element body, is arranged vertically above the third guide pulley 42. Similarly, a first guide pulley 401, which is rotatably supported by a rotary shaft in a horizontal direction at a right angle to the rotary shaft direction of the element body, is disposed diagonally below and to the left of the second guide pulley 402.

A resistance wire bobbin 400, which is rotatably supported by a rotary shaft in a horizontal direction at a right angle to the rotary shaft direction of the element body, is disposed diagonally to the lower right of the first guide pulley 401. The resistance wire bobbin 400 is rotatably arranged by a bobbin holder (not shown). As is clear from the above description, the resistance wire bobbin 400, the first guide pulley 401, and the second guide pulley 402 are all arranged on the same plane parallel to the element body rotation axis direction, and The axis of rotation is set in a direction perpendicular to the direction. As described above, the resistance wire 13 delivered from the resistance wire bobbin 400 is stretched so as to reach the resistance wire supply nozzle unit 41 via the first guide pulley 401, the second guide pulley 402, and the third guide pulley 42. Has been done.

Although the supply path of the resistance wire 13 is constructed as described above, in the present embodiment, the resistance wire supply section 4 is composed of the resistance wire supply nozzle unit 41 and the third guide pulley 42. explain. This is because the resistance wire supply nozzle unit 41 and the third guide pulley 42 move integrally in the element body rotation axis direction by the movement of the moving frame 52.

The structure of the resistance wire supply section 4 composed of the resistance wire supply nozzle unit 41 and the third guide reel 42 will be described in more detail. Resistance wire supply nozzle unit 4
The role of 1 is to separate the resistance wire 13 from the element body 10 while pressing the resistance wire 13 in the middle thereof in order to separate the resistance wire 13 during welding after winding, which will be described later. Then, at the time of winding the next element body 10, the tip end of the separated resistance wire 13 is advanced to move the terminal cap 11a or 11b.
It is to be placed on top.

The structure of the resistance wire supply nozzle unit 41 will be described in more detail. Resistance wire supply nozzle unit 41
Is entirely fixed on the above-mentioned anode side substrate 628. That is, as shown in FIG. 1, the anode-side substrate 628 has a shape that extends long behind the anode rod 62 that protrudes vertically upward, and the resistance wire supply nozzle unit 41 is disposed on this.
Is placed and fixed.

As shown in FIG. 6, on the anode side substrate 628, a nozzle unit mounting plate having an inverted L-shaped cross-section, which is composed of a vertical portion 411a and a horizontal portion 411b extending rightward from the vertical portion 411a. 411 is vertically fixed along the length direction of the nozzle. Nozzle unit mounting plate 4
A long rectangular rod-shaped nozzle base 412 is fixed to the right side surface of the vertical portion 411a of the nozzle 11.

Then, in the space between the nozzle base 412 and the horizontal portion 411b of the nozzle unit mounting plate 411,
Resistance wire clamper 413 in the shape of a rectangular rod long in the nozzle length direction
Are arranged. The resistance wire clamper 413 is fixed to the horizontal portion 411b via a spring (not shown). In addition, the horizontal portion 41 of the nozzle unit mounting plate 411
The resistance wire clamper 413 is mounted on the nozzle base 41 through a piston hole provided on the horizontal portion 411b.
Clamper air cylinder 4 that can be pressed against 2
15 is fixed.

Further, at the tip of the nozzle base 412,
A needle hole body 416 for guiding the resistance wire 13 toward the element body 10 is fixed on the nozzle base 412. Further, on the left side surface of the nozzle unit mounting plate 411, a rectangular parallelepiped moving body 417 having two guide through holes that are long in the length direction of the nozzle is fixedly attached. And
Two guide rods 418 for a moving body are loosely fitted in the guide through holes of the moving body 417. The two moving body guide rods 418 are erected on the anode side substrate 628,
The guide rod erection plate 419 is arranged laterally on both sides of the nozzle in the longitudinal direction.

Further, the moving body return spring 42 is provided between the moving body 417 and the guide rod installation plate 419 on the side close to the winding position.
1 is installed, and the force of the moving body return spring 421 applies a force to the moving body 417 in a direction approaching the winding position. Further, a small protrusion 419 is provided on the left side surface of the moving body 417. And this protrusion 4
Nozzle moving air cylinder 420 having a piston capable of pressing 19 to move moving body 417 in a direction away from the winding position contacts a back surface of guide rod erection plate 419 on the side closer to the winding position. It is fixed by touching it.

When the nozzle moving air cylinder 420 is driven and the piston advances, the protrusion 419 is pressed to move the moving body 417 in the direction away from the winding position by the force of the moving body return spring 421. Then, the protrusion 419 that is pressed and moved has a lead length changing rod 432 described later.
It comes into contact with the tip of the and stops. Next, the operation of the resistance wire supply nozzle unit 41 having the above structure will be described.

The terminal cap 11 is formed by the welding means 6 described above.
The resistance wire 13 having a tip at a or 11b moves while rubbing on the nozzle base 412 by the rotation of the body 10 by the body rotating motor 3 as the body rotating means. After passing through a small hole provided in 416, it is supplied to the rotating body 10 and wound. During this winding,
The resistance wire supply unit 41 is retreated to a retreat position where an optimum lead length according to the rigidity of the resistance wire 13 is maintained by a lead length changing mechanism 430 described later.

Then, the winding is completed, and the above-mentioned welding means 6
When it is welded to the terminal cap 11a or 11b, the remaining resistance wire 13 is cut off by the following operation. That is, first, the nozzle moving air cylinder 42
0 is driven, the piston moves backward, and the return spring 4 for the moving body
The force of 21 causes the moving body 417 to move forward toward the winding position. As a result, the entire resistance wire supply nozzle unit 41 advances to a predetermined position near the element body 10 and stops.

Next, the clamper air cylinder 415 operates and the piston pushes down the lower resistance wire clamper 413 against the force of the clamper return spring. As a result, the resistance wire clamper 413 presses the resistance wire 13 against the nozzle base 412, and the resistance wire 13 is temporarily unable to rub. In this state, the nozzle moving air cylinder 420 is driven to move the piston forward and move the moving body 41.
The protrusion 419 on the side surface of the movable body return spring 42 is pressed.
The moving body 417 in the direction away from the element body 10 against the force of 1.
To move.

As a result, the nozzle unit mounting plate 411 fixed to the moving body 417 moves in a direction away from the element body 10, and the nozzle base 412 and the resistance wire clamper 413 fixed to the nozzle unit mounting plate 411 are also integrated. Body 10
Move away from. That is, the resistance wire clamper 41
These members retreat together when the resistance wire 13 is pressed against the nozzle base 412 by the member 3.

By such an operation, the remaining resistance wire 13 on the rear side of the welded portion is separated. And
The protrusion 419 of the moving body 417 is connected to the lead length changing rod 432.
When it comes into contact with the tip of the, the movement stops. The stop position is the retracted position similar to that described above. After that, in the next winding of the element body 10 or the second spiral winding, the piston of the nozzle moving air cylinder 420 is driven so as to retract, and the resistance wire clamper 413 drives the resistance wire 13 in the same manner as described above. The resistance wire supply nozzle unit 41 integrally advances while being pressed against the nozzle base 412.

Then, the projection 419 comes into contact with the piston of the nozzle moving air cylinder 420 that has returned to the original position, and the moving body 417 stops moving forward. This position is set such that the tip of the pressed resistance wire 13 is located on the terminal cap 11a or 11b of the element body 10 to be wound. In this state, the welding means 6 described later operates to weld the tip to the terminal cap 11a or 11b. When welding is completed, the clamper air cylinder 4
The drive of 15 is released, the piston retracts, and the resistance wire clamper 413 rises by the force of the clamper return spring.
As a result, the resistance wire 13 is released from being pressed against the nozzle base 412, and the resistance wire 13 can be rubbed on the nozzle base 412.

In this state, the nozzle moving air cylinder 420 is driven again to move the piston forward, and the resistance wire supply unit 4 is moved to the retracted position where the optimum lead length can be maintained.
1 retreats.

Then, the rotation operation of the element body 10 as described above is started, and the winding of the resistance wire 13 around the element body 10 is started. Next, the lead length changing mechanism 430 will be described. As shown in FIG. 6, of the two guide rod erection plates 419 on which the movable body guide rods 418 are erected, the lead length changing mechanism is attached to the end surface of the guide rod erection plate 419 on the side farther from the winding position. The plate 431 is fixed in a flush state.

The lead length changing mechanism mounting plate 431 is provided with a through hole whose inner surface is threaded, and the lead length changing rod 432 is arranged in a state of being screwed into the through hole. .. That is, the lead length changing rod 432
Is the threaded lead length changing mechanism mounting plate 43.
It has a peripheral surface that is threaded so that it can be screwed into one through hole.

The lead length changing rod 432 is arranged with its tip end facing the projection 419 of the moving body 417, and the lead length changing rod 432 is turned at the rear end thereof to change the lead length. Mechanism mounting plate 431 to protrusion 4
A knob 433 for adjusting the protruding length toward 19
Is fixed. Therefore, when the knob 433 is rotated in a predetermined direction, the lead length changing rod 432 is displaced forward or backward while rotating. As described above, since the projection 419 of the moving body 417 moved by driving the nozzle moving air cylinder 420 comes into contact with the lead length changing rod 432, the lead portion changing rod is rotated by turning the knob 433 as described above. When the protrusion length of 432 is changed, the position of the protrusion 419 after movement is changed. As a result, it is possible to change the position of the moving body 417 after the movement, that is, the retracted position of the entire resistance wire supply nozzle unit 41.

The fact that the retracted position of the entire resistance wire supply unit 41 changes means that the distance between the needle hole body 416 and the winding position shown in FIG. 1 changes. Therefore, the body 10
It is possible to change the exposed length of the resistance wire toward the element body when wound on the. Incidentally, the knob portion 433 has a built-in micrometer portion (not shown) so that the protruding length of the lead length changing rod 432 can be finely adjusted.

FIG. 7 is an explanatory diagram of changing the lead length. In FIG. 7, the lead length is indicated by L. That is, the lead length is the exposed length of the resistance wire 13 when the resistance body 13 is wound around the body 10 by rotating the body 10, and the peripheral surface of the resistance wire supply unit 4 and the body 10. And refers to the length of the interval. The body 10 rotates and the resistance wire 13
The operation of winding is mechanically equivalent to the operation of rotating the resistance wire supply unit 4 without rotating the element body 10 as shown in FIG. 7.

Here, in the winding operation of the resistance wire 13, a rotating moment corresponding to the rigidity of the resistance wire 13 must be given for smooth winding. This rotation moment is actually given by the rotation of the element body 10 (by the rotation of the resistance wire supply unit 4 in FIG. 7), but this rotation moment has a constant rotation torque generated by the rotation source. In some cases, it is clear that it depends on the lead length.

When winding the resistance wire 13,
The resistance wire 13 abuts on the peripheral surface of the needle hole body 416, which is the member closest to the element body 10 of the resistance wire supply portion 4, and the force due to the rotational moment and the rigidity of the resistance wire 13 are applied to this portion. Accompanying stress is applied. Therefore, for example, when the lead wire is short even though the resistance wire 13 having high rigidity is used, the resistance wire 13 receives a strong force in the portion of the needle hole body 417 and is bent or damaged. There are cases.

Such a problem also applies to the peripheral surface of the element body 10 where the resistance wire 13 changes from a straight line state to a bent state, and if the rotational moment or stress is too large, smooth winding operation cannot be performed. .. Therefore, when the resistance wire 13 has a high rigidity, the lead length is increased. That is, the lead length is changed according to the rigidity of the resistance wire 13.

As described above, the mechanism for changing the lead length is as follows. The lead length changing rod 432 held by the lead length changing mechanism mounting plate 431 is rotated by the knob 433 to rotate the lead length changing rod. This is achieved by changing the protrusion length toward the protrusion 419. Next, the spiral winding means 5 in this automatic resistance wire winding machine will be described.

As described above, in the spiral winding means in the invention of the present application, when the element body 10 is rotated by the element body rotating means 3, one of the element body 10 and the resistance wire supply section 4 is rotated as the element body rotating shaft. By moving the resistance wire 13 in the direction, the winding of the resistance wire 13 is made spiral. The spiral winding means 5 in the automatic winding machine used in the winding method of the present embodiment is the body 1
Instead of 0, the resistance wire supply unit 4 is linearly moved in the direction of the axis of rotation of the element body. That is, in this automatic resistance wire winding machine, the mechanism for moving the moving frame 52 holding the resistance wire supply nozzle unit 41 corresponds to the spiral winding means 5. That is, the moving frame 52 holding the resistance wire supply unit 4 and the upper and lower two guide rods 51 for moving the moving frame 52 in the direction of the axis of rotation of the body, the precision screw rod 54,
It can be said that a mechanism such as the screwing unit 57 and the moving frame motor 55 constitutes the spiral winding means 5. That is,
After the welding means 6 welds the tip end of the resistance wire 13 to the terminal cap 11a or 11b, the moving frame motor 55 drives the moving frame 52 while the element rotating means 3 rotates the element 10. Moves in the direction of the axis of rotation of the element body, whereby the winding of the resistance wire 13 becomes spiral.

Finally, the control system of this automatic resistance wire winding machine will be described. FIG. 8 is a schematic explanatory diagram of a control system of the resistance wire automatic winding machine. The control of the resistance wire automatic winding machine is basically a sequence control, and the controller 100 is provided for performing this sequence control. As shown in FIG. 8, the control target to which the controller 100 sends a control signal is
It is divided into three main parts.

First, there is an air drive system consisting of seven air cylinders. That is, the air cylinder 73 for supplying the element body, the air cylinders 23, 23 for advancing and retreating the two element holding cylinders, the air cylinder 612 for raising and lowering the cathode, and the air cylinder 62 for raising and lowering the anode
2. Control signals are sent to the six air cylinders of the nozzle moving air cylinder 420 and the clamper air cylinder 415 to control the advance / retreat of each piston.

Secondly, the controller 100 sends control signals to five motors or solenoids as an electric system. That is, the arm swinging drive source 725, the element body rotating motors 3 and 3 as the two element body rotating means, the moving frame motor 55, and the resistance wire riding drive source 8
It is 3. Thirdly, a power supply circuit 63 for energizing between the cathode rod and the anode rod to weld the resistance wire to the terminal cap.
The power supply circuit 63 is provided with a switch 6 that is opened / closed by a control signal from the controller 100.
4 is attached.

Although not shown in FIG. 8, the controller 100 has an external input for inputting the resistivity value of the wound resistance wire and the finished resistance value of the resistor to be manufactured. The display unit includes an input panel and a liquid crystal display panel for displaying input data and a calculation result of a later-described built-in computer for confirmation. Next, a method of winding a resistance wire using the resistance wire automatic winding machine of the above embodiment will be described while explaining the control of the controller 100 shown in FIG.

First, the resistance wire bobbin 400 wound with a large amount of the resistance wire 13 wound around the element body 10 is set in a bobbin holder (not shown), the resistance wire 13 is pulled out, and the third guide reel 401, second The guide reel 402 and the first guide reel 42 are stretched in this order as shown in FIG. Then, as shown in FIG. 1, the resistance wire supply nozzle unit 41
Set to.

The respective parts of the automatic resistance wire winding machine described above are located at the following primitive positions. That is, the element body supply arm 72 is positioned at a predetermined retracted position away from the winding position while supporting the element body 10. Further, the pair of element body holding cylinders 21 and 21 are located at positions separated from each other. The cathode rod 61 is in the upper retracted position, and the anode rod 62 is in the lower retracted position. Further, the resistance wire supply nozzle unit 41 is located at a predetermined retracted position away from the winding position in a state where the resistance wire clamper temporarily presses the resistance wire 13 against the nozzle base 412. The resistance wire supply nozzle unit 41 is in a posture along a direction perpendicular to the element body rotation axis.

Next, the resistivity of the set resistance wire 13 and the resistance value of the resistor to be manufactured are manually input from the input panel. Further, in consideration of the rigidity of the set resistance wire 13, the knob portion 433 of the lead length changing rod 432 shown in FIG. 6 is turned to optimize the protruding length of the lead length changing rod 432. The computer incorporated in the controller 100 calculates the winding length of the resistance wire 13 based on the input data.

Then, when the operation button on the input panel is pressed, an operation start signal is sent to the controller 100.
The controller 100 first sends a piston advance signal to the element supply air cylinder 73. As a result, the element supply air cylinder 73 is driven and the piston projects forward,
The element body supply arm 72 shown in FIG. 1 advances to the winding position and stops. In addition, the element supply air cylinder 7 is arranged so that the position of the element on the stopped element supply arm 72 is aligned with the pair of opposed element holding cylinders 21 and 21.
The stroke length of the piston of 3 is set.

Next, the controller 100 sends a piston advance signal to the air cylinders 23, 23 for advancing and retreating the body holding cylinders attached to the pair of body holding cylinders 21, 21. As a result, the air cylinders 23, 23 for advancing / retracting the element body holding cylinders are operated and the piston pushes out the rotation means holding plates 31, 31, and as a result, the pair of element body holding cylinders 21, 21 approach each other. Then, as shown in FIG. 2, the lead wires extending from both ends of the element body 10 enter the inside from the open ends of the tip ends of the element body holding cylinders 21 and 21, and the element body holding cylinders 21 and 21 are connected to the terminal caps 11a and 11b, the terminal caps 11a, 11
The element body 10 is sandwiched between the portions b.

At this position, the air cylinders 23 for advancing and retracting the element holding cylinders 21 and 21 stop so that the approaching of the element holding cylinders 21 and 21 is stopped.
The stroke of 23 pistons is set. Therefore, the element holding cylinders 21 and 21 are connected to the terminal caps 11a and 11
While pressing b lightly, two element holding cylinders 21, 21
Approaching stops. After the driving time of the air cylinders 23, 23 for advancing and retracting the body holding cylinder, the controller 100
Sends a drive signal to an arm swinging drive source 725 built in the body supply arm 72, and as a result, the body supply rod 72
The reference numeral 4 separates downward from the element body 10. Then, the controller 100 sends a piston retreat signal to the element supply air cylinder 73, the element supply arm 72 starts moving in a direction away from the winding position, and reaches the aforementioned original position and stops.

When the backward drive time of the piston of the body supply air cylinder 73 has elapsed, the controller 100 sends a piston backward signal to the nozzle moving air cylinder 420. As a result, the resistance wire clamper 413 and the nozzle base 4
12 and 12 move integrally toward the element body 10. The stroke of the piston of the nozzle moving air cylinder 420 is set so that the tip of the resistance wire 13 pressed against the nozzle base 412 by the resistance wire clamper 413 is positioned above the left terminal cap 11a. There is.

When the backward drive time of the piston of the nozzle moving air cylinder 420 elapses, the controller 100
Sends a simultaneous piston advance signal to the cathode lift air cylinder 612 and the anode lift air cylinder 622. As a result, the cathode rod 61 descends and the anode rod 62 rises. As a result, the cathode rod 61 and the anode rod 62 are in a state of vertically sandwiching the left terminal cap 11a on which the tip of the resistance wire 13 is positioned. That is, the cathode lifting air cylinder 61
The stroke length of the piston of No. 2 is such that the tip of the cathode rod 61 is in a position where the tip of the cathode rod 61 abuts lightly on the upper surface of the terminal cap 11a. The length is set to a position where the cap 11a is brought into light contact with the lower surface.

When the driving time of the cathode raising / lowering air cylinder 612 and the anode raising / lowering air cylinder 622 elapses, the controller 100 sends a closing signal to the switch 64 attached to the welding power source circuit 63, and the cathode rod 61 and the anode rod 61. And 62 are energized. As a result, the tip of the resistance wire 13 melts. After a short energization time of about 1 second, an open signal is sent from the controller 100 to the switch 64, and the energization is stopped.

After that, the controller 100 causes the cathode lifting air cylinder 612 and the anode lifting air cylinder 62 to move.
A piston retreat signal is sent to 2, the cathode rod 61 rises and the anode rod 62 descends to return to the original position. At the same time, the controller 100 sends a drive signal to the nozzle moving air cylinder 420 to move the piston forward and retract the resistance wire supply unit 41. The retracted position of the resistance wire supply unit 41 is a position where a predetermined lead length corresponding to the rigidity of the resistance wire 13 can be maintained, as described above.

Then, the controller 100 simultaneously sends drive signals to the body rotating motors 3 and 3 as the body rotating means and the moving frame motor 55. As a result,
The element body 10 starts to rotate by the rotation of the element body holding cylinders 21 and 21, and at the same time, the resistance wire supply unit 4 starts to move rightward in the element body rotation axis direction by the movement of the moving frame 52. The drive time of the motors 3 and 3 for rotating the body as the body rotating means and the drive time of the moving frame 52 are the controller
The computer built into 0 automatically calculates according to the winding length calculated as described above.

Here, in this embodiment, the rotation speeds of the element body rotating motors 3, 3 as the element body rotating means are kept constant regardless of the winding length. Therefore, the rotation speed of the moving frame motor 55 is adjusted to change the moving speed of the moving frame 52, thereby adjusting the winding length.
Next, when welding the rear end of the resistance wire 13, the resistance wire 13 is mounted on the terminal cap as follows.

FIG. 9 is a perspective view for explaining the riding operation of the resistance wire. As shown in FIG. 9, the outer diameters of the terminal caps 11 a and 11 b attached to both ends of the element body 10 are equal to each other.
It is slightly larger than the outer diameter of 0. Therefore, the end surfaces of the pressure-applied portions of the capped terminal caps 11a and 11b are
A step is formed on the peripheral surface of the element body 10.

Here, if the height of the step is higher than the thickness of the resistance wire 13 to be wound, only the linear movement operation of the resistance wire supply unit 4 while rotating the element body 10 will be described later. Then, the resistance wire 13 may not be able to get over this step. Therefore, the resistance wire supply unit 4 is integrally swung together with the anode side substrate 628 around the vertical swing axis as described above,
As shown in FIG. 9, the rear end of the wound resistance wire 13 is mounted on the terminal caps 11a and 11b. The swing axis is set slightly forward of the vertical line where the cathode rod 61 and the anode rod 62 face each other. Therefore, the above-mentioned swing slightly swings the facing positions of the cathode rod 61 and the anode rod 62, and the terminal caps 11a and 11b.
Will be located above.

In such a resistance wire riding operation, the controller 100 drives the resistance wire riding drive 8 as described above.
3 by sending a drive signal of a predetermined angle. After the resistance wire 13 is spirally wound around the peripheral surface of the element body 10 in this manner, the controller 100 sends a drive signal to the resistance wire riding drive source 83 to cause the resistance wire 13 to travel.
The ride operation is performed. The swinging direction at this time is rightward because the user rides on the right terminal cap 11b.

After the drive time for riding the resistance wire 13 has elapsed, a piston retract signal is sent to the nozzle moving air cylinder 420 to retract the piston. As a result, the moving body 417 is moved forward by the force of the moving body return spring 421, and the resistance wire supply nozzle unit 41 reaches the forward moving position similar to that described above. At the same time, the controller 100
A piston advance signal is sent to the cathode elevating air cylinder 612 and the anode elevating air cylinder 622 to lower the cathode rod 61 and raise the anode rod 62. Then, as in the case of the left terminal cap 11a, the cathode rod 61 and the anode rod 62 are
With the right and left terminal caps 11b sandwiched vertically,
The controller 100 sends a closing signal to the switch 64 attached to the welding power supply circuit 63, and the cathode rod 61 and the anode rod 62 are connected.
Are energized to weld the rear end of the wound resistance wire 13.

After that, in a state where the resistance wire 13 is melted by energization, the controller 100 sends a piston advance signal to the clamper air cylinder 415 to press the resistance wire 13 against the nozzle base 412 in the same manner as described above and temporarily. Fix it. Then, the controller 100 sends a piston advance signal to the nozzle moving air cylinder 420 to retract the resistance wire supply nozzle unit 41 to a predetermined retracted position. As a result, the resistance wire 13 is separated from the melted portion.

Next, the controller 100 sends an open signal to the switch 64 attached to the welding power supply circuit 63 to stop the energization, and the cathode retreating signal is simultaneously sent to the cathode elevating air cylinder 612 and the anode elevating air cylinder 622. To raise the cathode rod 61 and lower the anode rod 62. Then, the controller 100 sends a return signal to the resistance wire riding drive source 83 after the elapse of the driving time of the cathode lifting air cylinder 612 and the anode lifting air cylinder 622, and the resistance wire together with the anode side substrate 628. The supply unit 4 is swung in the opposite direction to return to the initial position. That is, the resistance wire supply nozzle unit 41 is in a posture along the direction perpendicular to the axis of rotation of the element body as at the beginning.

Then, the controller 100 sends a piston retreat drive signal to the air cylinders 23, 23 for advancing / retracting the element body holding cylinders to retract the spindles 22, 22 so that the pair of element body holding cylinders 21, 21 are separated from each other. Move to. As a result, the holding of the element body 10 by the element body holding cylinders 21 and 21 is released, and the element body 10 is dropped and collected in the lower body body collecting portion (not shown).

On the other hand, the controller 100 sends a backward movement signal to the moving frame motor 55 to move the moving frame 52 in the opposite direction, that is, to the left, and moves it to the position of the left terminal cap 11a and stops it. As a result, all the constituents have returned to the original position, and after a lapse of a predetermined time, the winding operation of the next element body is started, and the above-described operation is repeated again.

[0110]

As described above, according to the automatic resistance wire winding machine of the invention of the present application, the operation of winding the resistance wire around the element forming the winding resistor can be automated. Since the manufacturing efficiency of the wire resistor is improved and the lead length can be changed according to the rigidity of the resistance wire to be wound, various resistance wires having different rigidity can be suitably and easily wound. There is.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an automatic resistance wire winding machine of the present embodiment.

FIG. 2 is a partial cross-sectional view for explaining an element body holding structure by an element body holding portion of the resistance wire automatic winding machine of FIG.

FIG. 3 is a plan sectional view for explaining a configuration of an entire body holding unit of the automatic resistance wire winding machine of FIG.

FIG. 4 is a vertical sectional view of the welding means shown in FIG.

5 is a view for explaining the moving mechanism of the moving frame, and is a schematic perspective view of the resistance wire winding machine of FIG. 1 seen from the rear side.

FIG. 6 is a perspective view of the resistance wire supply unit shown in FIG. 1 viewed from the rear side.

FIG. 7 is an explanatory diagram of changing a lead length.

8 is a schematic explanatory diagram of a control system of the resistance wire automatic winding machine in FIG. 1. FIG.

FIG. 9 is a perspective view illustrating a riding operation of a resistance wire.

FIG. 10 is a schematic perspective view of a wound resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 resistor 10 element body 11a terminal cap 11b terminal cap 13 resistance wire 2 element body holding part 3 element body rotating means 4 resistance wire supply section 5 spiral winding means 6 welding means 430 lead length changing mechanism

Claims (1)

[Claims] 1. An element body holding portion for holding an element body made of a cylindrical insulating material having a pair of terminal caps attached to both ends thereof, and an element body rotating means for rotating the element body around a center line thereof. And a resistance wire supply part for supplying the resistance wire to the element body so that the resistance wire is wound around the rotating element body, and one of the element body and the resistance wire supply portion is moved in the direction of the center line of the element body. And a spiral winding means for spirally winding the resistance wire around the element body, the tip of the resistance wire supplied by the resistance wire supply unit and the rear end of the wound resistance wire, Having a welding means for welding to each of the terminal caps,
In order to make it possible to change the lead length, which is the length of the resistance wire of the portion exposed from the tip of the resistance wire supply section toward the element body, depending on the rigidity of the resistance wire to be wound, the element body and the resistance wire An automatic resistance wire winding machine comprising a lead length changing mechanism for changing a distance from a supply section.