JPH08222466A - Automatic winding machine - Google Patents

Abstract

PURPOSE: To enable wires of various diameters to be cut off at a terminal without causing deformation to the terminal or damage to a bobbin by a method wherein a swinging member which is provided with recess and freely movable in both a horizontal and a vertical direction is provided, and a wire which is wound on the terminal of the bobbin and stretched in tension is swung as it is put through the recess. CONSTITUTION: A recess 46 is formed of the projection 44 of a movable block 40 which protrudes downwards and the lower part of a rotary plate 50. A wire 5 is wound on a terminal 12, and the movable block 40 is moved down until the wire 5 is put in the recess 46. The wire 5 is stretched taut between the terminal 12 and a clamper 70. The movable block 40 is reciprocated together with a nozzle holder 30 in a lateral direction to move the wire 5 with the recess 46. A swinging motion causes a metal fatigue to the wire 5 at the corner of the terminal 12, and the wire 5 is cut off at its part tied to the terminal 12. By this setup, the wire 5 is capable of being easily cut off at its part fastened to the terminal 12 without causing deformation to the terminal or damage to a bobbin 10 even if it is comparatively large in diameter.

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 for electronic parts such as coils, and in particular, after winding a wire around a terminal,
The present invention relates to a structure for cutting an end of an unnecessary wire rod at the root of the terminal.

[0002]

2. Description of the Related Art FIG. 7 shows a state immediately after a lead on the winding start side of a coil is wound around a terminal 3 of a bobbin 2 by a guide nozzle 1. The end of the wire 5 is held by being sandwiched by the clamper 4, and a cutter pin 6 is provided between the terminal 3 and the clamper 4. The bobbin 2 is supported by a rotatable chuck (not shown). After that, in order to rotate the chuck and apply the coil winding to the bobbin 2, the wire 5 in the portion extending from the terminal 3 to the clamper side must be cut and removed. Conventionally, the wire rod 5 is cut by a so-called pull-cutting method in which the cutter pin 6 is moved in the direction of the arrow and a strong tension is applied to the wire rod 5 to cut at the edge portion of the terminal 3 having a large curvature.

[0003]

This pull-cutting method is effective for thin wires 5, but as the wires 5 become thicker, the terminals 3 bend or the bobbin 2 is damaged before the wires 5 are cut. Will occur. For this reason, the thickness of the wire 5 cut by the pull cutting method is limited to a diameter of about 0.10 mm to 0.12 mm in the case of the urethane-coated copper wire. An object of the present invention is to provide an automatic winding machine capable of cutting from a thin wire to a thick wire at a terminal portion without causing deformation of the terminal or damage to the bobbin.

[0004]

SUMMARY OF THE INVENTION An automatic winding machine according to the present invention comprises a chuck for holding a bobbin to which terminals are attached,
A guide nozzle that has a hole for supplying a wire rod and is movable in the horizontal and vertical directions; a clamper that holds the wire rod in between; and a swing member that has a recess and that is movable in the horizontal and vertical directions, The wire rod wound around the terminal of the bobbin held by the chuck and stretched between the terminal and the clamper,
A feature of the present invention is that the swing member is reciprocally moved in a state of being passed through the recess, and this wire is swung and cut at a portion wound around the terminal.

[0005]

1 is a partially sectional side view showing an embodiment of an automatic winding machine according to the present invention, and FIG. 2 is a front view of a main portion thereof. A bobbin 10 having terminals 12 attached to two side surfaces is held by being sandwiched by a chuck 20 rotatable about a horizontal axis. A guide nozzle 32 having a hole for supplying a wire and an air cylinder 35 are fixed to a nozzle holder 30 which is movable in the horizontal direction and the vertical direction. 40 is an air cylinder
A moving block connected to a piston 38 (FIG. 2) of 35. An outer nozzle 60 having a through hole 62 is fixed to the moving block 40, and a guide nozzle 32 is inserted into the through hole 62. The moving block 40 is driven by the air cylinder 35 to move in the vertical direction with respect to the nozzle holder 30. When the moving block 40 is in the upper position, the tip of the guide nozzle 32 projects downward from the outer nozzle 60, and when the moving block 40 is in the lower position, the tip of the guide nozzle 32 is drawn above the lower end of the outer nozzle 60. ing. The lower ends of the guide nozzle 32 and the outer nozzle 60, which come into contact with the wire 5, are rounded so as not to damage the wire 5 fed from the tip of the guide nozzle 32.

A rotating plate 50 is further rotatably supported by a screw 52 and attached to the moving block 40. As shown in FIG. 2, the rotating plate 50 is given a rotational force in the direction of the arrow by the spring 54, and the rotating plate 50 abuts on the stopper 42 attached to the moving block 40 and stops. A downward protrusion 44 is formed on the moving block 40, and a concave portion 46 is formed on the lower side of the moving block 40 by the protruding portion and the lower portion of the rotary plate 50. One side surface 47 of the recess 46 is composed of a rotary plate 50 that is movable within a certain range, and is biased inward of the recess 46 by a spring 54.

Reference numeral 70 is a clamper for fixing the wire 5. The clamper 70 is composed of a tubular body 72 and a pusher 74 having a shaft that passes through the tubular body 72, and is a pusher 74 that is vertically movable.
The wire 5 is sandwiched and held between the cylinder body 72 and the cylindrical body 72. Since the moving block 40 is supported by the nozzle holder 30, it can move in any direction together with the nozzle holder 30. To cut the wire 5 stretched between the terminal 12 and the clamper 70, the moving block 40 is moved to the vicinity of the bobbin 10 as described later,
It is performed in the state of FIG. 1 in which the wire 5 is passed through the recess 46. In this way, the pin 80 capable of pressing the wire 5 from the side is provided at a position between the moving block 40 and the clamper 70 when the wire 5 is passed through the recess 46.

FIG. 3 is a top view of the automatic winding machine in the state of FIG. The pin 80 is fixed to a pin holder 84 which is biased in one direction by a spring 82, and
The wire rod 5 is elastically pressed by the force of 82. The direction in which the pin 80 is biased by the spring 82 is the same as the direction in which one side surface of the recess 46 is biased by the spring 54, and is the right direction in FIG. In FIG. 3, 85 is a stopper for preventing the wire 5 from coming off the pin 70,
86 is a collar fixed to the pin holder 84, and 88 is a support metal fitting that movably supports the pin holder 84 passed through the through hole.
The support fitting 88 is fixed to a common base (not shown) to which the chuck 20, the nozzle holder 30, the cylinder 72 of the clamper 70, etc. are attached.

Next, the operation of the automatic winding machine configured as described above will be described. 1 and 3 show a guide nozzle
After the wire rod 5 is wound around the terminal 12 by rotating 32 around the terminal 12 together with the nozzle holder 30, the moving block 40 is lowered until the wire rod 5 enters the recess 46. The wire 5 wound around the terminal 12 serves as a lead on the winding start side of the coil, and the guide nozzle 32 is located inside the outer nozzle 60 that descends together with the moving block 40. The end of the wire 5 is held by the clamper 70, and the pin 80 presses the wire 5 by the force of the spring 82 as shown in FIG. Therefore, the wire 5 between the terminal 12 and the clamper 70 is in a tensioned state without slack.

A wire rod which has become unnecessary after the winding of the lead wire on the winding start side is wound around the terminal 12, that is, an end of the wire rod 5 extending from the terminal 12 to the clamper 70 side is cut and removed as follows. In the state of FIG. 3, the moving block 40 is reciprocated in the left-right direction together with the nozzle holder 30, and the wire rod 5 is rocked in the recess 46. The two-dot chain line in the figure shows the position of the wire rod 5 when it is rocked. Then, the wire 5 causes metal fatigue at the corners of the terminal 12 having a large curvature, and is rocked several times to a dozen or more times to be cut at the winding part around the terminal 12. At this time, if the moving block 40 is reciprocally moved with a large amplitude from the beginning, an excessive force is applied to the terminal 12 and the bobbin 10. It is advisable to make a reciprocating motion after moving. At this time, since the outer nozzle 60 having a small curvature at the tip is descended, the wire 5 is not cut at the tip of the guide nozzle 32.

The wire rod 5 is moved by the reciprocating motion of the moving block 40.
In order to effectively cause metal fatigue, it is necessary to keep the wire rod 5 tight without slack. The tension of the wire 5
It is obtained by being pushed to the right in FIG. 3 by the pin 80 biased by the spring 82. Moving block 40
The wire rod 5 is stretched as it is shaken by, but the stretched portion is also absorbed by the spring 82, and the tension state of the wire rod 5 is maintained. Spring 82 biasing pin 80
While the wire rod 5 is always tensioned, it also functions as a buffer spring that prevents an excessive force from being applied to the wire rod 5 when the moving block 40 moves to the left. On the other hand, the rotating plate
The spring 54 for urging 50 serves to prevent a large force from being suddenly applied to the wire 5 when the moving block 40 moves to the right in FIG.

After the wire rod 5 is cut at the root of the terminal 12 in this way, the terminal of the wire rod 5 that is no longer needed is clamped.
70 is opened and removed, and at the same time, the moving block 40 is raised to cause the tip of the guide nozzle 32 to project downward from the outer nozzle 60. Then, after moving the guide nozzle 32 to a predetermined position on the bobbin 10, the chuck 20 is rotated to move the bobbin 10
The wire rod 5 is wound around to form a coil. After winding the bobbin 10, the guide nozzle 32 is rotated around another terminal 12 to wind the lead on the winding end side around the terminal 12. Then, the clamper 70 opened as shown in FIG.
After the nozzle holder 30 has been circulated about once around, the clamper 70 is closed to hold the wire 5. When the guide nozzle 32 is rotated around the clamper 70, the wire 80 pushes the pin 80 to compress the spring 82, so that the wire 5 between the terminal 12 and the clamper 70 is sufficiently tensioned.

Next, as shown in FIG. 5, the nozzle holder 30 is moved to the vicinity of the bobbin 10 and the moving block 40 is lowered to a position where the wire 5 passes through the recess 46. Then, as in the case described above, the concave portion 46 of the moving block 40 is reciprocated, and the wire 5 is swung to cut at the portion wound around the terminal 12. After that, when winding the secondary coil, first, the moving block 40 is raised, and at the same time, the nozzle holder 30 is moved to move the wire 5 between the clamper 70 and the guide nozzle 32 to the front side of the pin 80. And the outer nozzle 60
After the guide nozzle 32 projected from the wire is wound around the predetermined terminal 12 together with the nozzle holder 30 to wind the wire 5, the moving block 40 is lowered. Then, the state shown in FIG. 1 is obtained, and the above operation may be repeated.

When all the windings are completed, the bobbin 10 is removed from the chuck 20, replaced with a new bobbin 10, and a series of operations is repeated. If the wire 5 is thin and has a diameter of 0.12 mm or less that can be cut by the pulling method, it is not necessary to swing the moving block 40. At that time, as shown in FIG. 6, the moving block with the wire 5 applied to the tip end
By advancing 40 in the direction of the arrow, it is possible to pull it off once as shown by the chain double-dashed line. In addition,
The one side surface 27 of the recess 46 in FIG. 2 is constituted by the rotary plate 50, but the one side surface 27 may be one which is biased inward of the recess 46 by a spring, and is configured to move linearly. Good.

[0015]

According to the present invention, even if the wire rod is relatively thick, it is possible to easily cut the wire around the terminal without deforming the terminal or damaging the bobbin. Further, since the thin wire can be pulled and cut by pushing the tip of the swinging member as in the conventional case, an automatic winding machine that can handle various wire materials from thin wire to thick wire can be obtained.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing an embodiment of an automatic winding machine of the present invention.

FIG. 2 is a front view of the main part of the same automatic winding machine.

FIG. 3 is a plan view of the same automatic winding machine in the same first step as FIG. 1.

FIG. 4 is a partial sectional side view showing a second step.

FIG. 5 is a side view showing a third step.

FIG. 6 is a plan view showing another cutting method.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 10 Bobbin 20 Chuck 32 Guide nozzle 40 Moving block 46 Recess 50 Rotating plate 70 Clamper 80 Pin

Claims (6)

[Claims] 1. A chuck for holding a bobbin to which a terminal is attached, a guide nozzle having a hole for supplying a wire rod and movable in the horizontal and vertical directions, a clamper for holding the wire rod, and a recess. A bobbin held by a chuck and wound around the terminal of the bobbin and stretched between the terminal and the clamper, with the swinging member movable horizontally and vertically. An automatic winding machine, characterized in that an oscillating member is reciprocated to oscillate the wire to cut at a portion wound around a terminal. 2. The automatic winding machine according to claim 1, further comprising a nozzle holder to which a guide nozzle is fixed, and a swinging member having a concave portion provided on a lower side thereof is attached to the nozzle holder so as to be vertically movable. 3. A side surface of the recess of the swinging member is configured to be movable within a predetermined range, and the one side surface is biased toward the inside of the recess by a first spring, and the biasing direction of the one side surface is set. A pin urged by a second spring in the same direction is provided at a position between the swinging member and the clamper when cutting the wire, and the wire stretched between the terminal and the clamper is pressed by the pin and becomes tense. The automatic winding machine according to claim 2, configured as described above. 4. The automatic winding machine according to claim 3, wherein the swing member gradually reciprocates with a constant width after gradually increasing the moving width. 5. A moving block in which a swing member is attached to a nozzle holder so as to be movable up and down, and a rotary plate which is rotatably supported by the moving block and is given a rotational force in one direction by a first spring. 5. The automatic winding machine according to claim 3, wherein the concave portion is formed by a downward projection portion provided on the moving block and a lower portion of the rotary plate. 6. An outer nozzle having a through hole is fixedly provided to a moving block, and when the guide nozzle is inserted into the through hole and the swing member reciprocates to cut the wire rod, the moving block is a nozzle holder. 6. The automatic winding machine according to claim 5, wherein the tip of the guide nozzle is drawn above the lower end of the outer nozzle by lowering the guide nozzle.