JPH0568088B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the invention] (Industrial field of application) The present invention relates to a method and an apparatus for winding metal strips, for example for making electronic components.

(Prior Art) For example, some film capacitors, which are electronic components, are formed by winding a metal band into a coil shape.

Conventionally, such a Fulme capacitor was formed as follows. In other words, a slot is made in a round bar with an outer shape that corresponds to the inner diameter of the core, the end of a plastic film is first inserted into the slot, and this plastic film is inserted into the round bar for 2 to 3 minutes.
Wrap it about 3 times. Next, the plastic film and the starting end of the metal band are wound around the round bar, and the plastic film is cut when the starting end of the metal band is fixed to the round bar. After the metal band is individually wound around the round bar for a predetermined length, the terminal end of the metal band is fixed with an adhesive tape or an adhesive.

Once a metal band of a predetermined length has been wound in this way, the round rod is removed from the center of the metal band, and the plastic film remaining on that part is removed manually or by incineration, thereby creating a film made of the metal band. It is used to form the core of a capacitor.

However, with this method, when the round rod is pulled out from the wound metal band, a plastic film remains on the inner diameter of the rod, so the plastic film must be removed manually or by incineration as described above. must be removed. Therefore, the removal work requires a considerable amount of time and effort, resulting in a decrease in productivity. Furthermore, since it is necessary to wrap a plastic film around the round bar before wrapping the metal strip around it, this also causes a problem of reduced productivity.
Furthermore, since the starting end of the metal band is fixed to the round bar with a plastic film, if the metal band has high rigidity, it may not be possible to wind it with a small inner diameter.

Furthermore, if the terminal end of the wound metal strip is fixed with an adhesive tape or adhesive, not only is the workability poor, but the tape may peel off, resulting in a decrease in yield.

(Problem to be solved by the invention) In the past, the starting end of a metal band was fixed around a round bar with a plastic film and then wound, and the ending end was fixed with adhesive tape or adhesive. This not only necessitates the removal and winding of the plastic film, leading to a decrease in productivity, but also makes it impossible to wrap the metal strip around a small inner diameter if the metal strip is highly rigid. There were problems such as the terminal end of the tape sometimes peeling off.

[Structure of the Invention] (Means and Effects for Solving the Problems) This invention for solving the above problems includes a pipe-shaped winding core with a part of the peripheral wall cut out, and a winding core that is inserted into the winding core. a first step of clamping and fixing the starting end of the metal strip with a presser rod, and rotating the core and the presser rod together so that the metal strip is attached to the outer peripheral surface of the core to a predetermined length; a second step of winding the metal strip around the core, and a third step of spot welding a predetermined length from the end of the metal strip to prevent the end of the metal band from unraveling. The length of the raised part of the end of the metal strip produced in this third step is detected, and the winding core is rotated at an angle corresponding to the detected length to spot the end of the raised part of the metal strip. A metal strip comprising a fourth step of welding, and a fifth step of sequentially extracting the presser rod and the winding core from the metal strip wound around the winding core and spot-welded at the end. A supply unit that supplies the winding direction and the metal strip, a pipe-shaped winding core with a part of the peripheral wall cut out, and a starting end of the metal strip that is inserted into the winding core and is clamped and fixed between the winding core and the winding core. a presser rod; a driving section that rotationally drives the winding core and the presser rod to wind the metal band around the outer periphery of the winding core; and a detection section that detects the length of the metal band wound around the winding core. a cutting section that cuts the metal strip in response to a detection signal from the detection section; and a section wound around a predetermined length from the end of the metal strip cut by the cutting section and the end. a welding mechanism for welding the metal strip, and a detector for detecting the length of the part raised from the wound part after welding a predetermined length from the terminal end of the metal band by the welding mechanism; There is provided a metal strip winding device comprising means for sequentially extracting the presser rod and the winding core from the metal strip whose end portion has been processed by the welding mechanism. Furthermore, the metal band can be wound without using plastic film, and the end portion of the wound metal band can be reliably treated.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. The metal band winding device shown in FIGS. 1 and 2 includes a main body 1. The metal band winding device shown in FIGS. A ribbon spool 3 serving as a supply section around which a metal band 2 such as amorphous metal is wound is rotatably provided on the front surface of the main body 1. The metal band 2 drawn out from this ribbon spool 3 is attached to the first to fourth guide rollers 4.
a to 4d and a clamper 5 to a drive unit 6. The first guide roller 4a is movably provided by a tensioner 7, so that the tension of the metal band 2 can be adjusted. A detection unit 8 for detecting the rotation speed is connected to the third guide roller 4c. This detecting section 8 detects the number of rotations of the third guide roller 4c, that is, the feeding length of the metal band 2.

The clamper 5 includes a fixed piece 9, a movable piece 11 that is rotated such that one end thereof approaches and separates from the fixed piece 9 via the metal band 2, and a first movable piece 11 that rotationally drives the movable piece 11. These cylinders 12 are provided on a movable body 13 shown by a chain line in the figure. This movable body 13 is driven by a drive mechanism (not shown) in directions toward and away from the drive section 6, which are indicated by arrows in FIG.

A cutting section 14 is provided between the clamper 5 and the drive section 6. The cutting section 14 is composed of a cutter 15 and a second cylinder 16 that drives the cutter 15 in a direction perpendicular to the running direction of the metal strip 2, which is indicated by an arrow in the figure.

The driving section 6 has a winding core 17 that is rotationally driven by a pulse motor (not shown). This core 1
As shown in FIG. 3, 7 is made of a pipe material, and the distal end thereof is formed into a fitting part 18 having a semicircular cross section by cutting the peripheral wall over approximately 180 degrees in the circumferential direction. Above this winding core 17, a presser rod 19 is attached so that its tip end is connected to the fitting part 1 of the winding core 17.
It is arranged to face 8. This presser rod 19 is connected to a third cylinder 21 via a movable member 20.
As shown by the arrow in FIG. 3, the winding core 17
is driven in the radial direction of the fourth cylinder 2
2 to be driven in the axial direction. When the presser rod 19 is driven in the radial direction by the third cylinder 21, the tip end of the presser rod 19 fits into the fitting part 18, and in the fitted state, the fourth cylinder 22 When the presser rods 19 are driven in the axially separating direction by
The leading end of the winding core 17 can be disengaged from the fitting part 18 of the winding core 17. When the presser rod 19 is fitted into the winding core 17, they are connected by a clamper (not shown), and in this state, the winding core 17 and the presser rod 19 can be rotated together.

An electrostatic storage type welding mechanism 25 as a processing means is arranged near the joint 18 of the winding core 17. As will be described later, this welding mechanism 25 consists of a lower electrode body 26 and an upper electrode body 27 that sandwich the metal band 2 wound around the fitting portion 18. The lower electrode body 26 includes a receiving electrode 29 made of copper, phosphorus alloy, etc. and having a V-groove 28 formed therein, and a fifth cylinder 31 that drives the receiving electrode 27 in the direction toward and away from the fitting portion 18. Consisting of

The upper electrode body 27 has a holding case 32 . This holding case 32 is made of an insulating material and is formed into a box shape with an open lower end surface, and a pressing body 33 also made of an insulating material is slidably held inside the holding case 32. That is, in the upper and lower ends of the pressing body 33, there are elongated holes 34 penetrating in the width direction.
are drilled therein, and a support shaft 35 installed between the side walls of the holding case 32 is fitted into these elongated holes 34 . In addition, the upper end surface of the pressing body 33 and the holding case 3
A spring 36 that biases the pressing body 33 in the projecting direction is provided between the spring 36 and the inner surface of the housing 2 . Further, the pressing body 33 is provided with a plurality of accommodation holes 37 (two in this embodiment) in the vertical direction thereof. In each of these accommodation holes 37, a pressure electrode 39 having a tungsten chip 38 attached to the lower end is attached to the support shaft 35.
It is held in a non-slidable manner by the Further, a sixth cylinder 41 is connected to the holding case 32, whereby the upper electrode body 27 is driven in a direction in which it is separated from the fitting portion 18 of the winding core 17. . When the lower electrode body 26 and the upper electrode body 27 are driven in a direction approaching each other and sandwich the metal band 2 wound around the fitting part 18 of the winding core 17, the tungsten chip 38 of the upper electrode body 27 The parts are now spot welded.

A photoelectric detector 42 is located near the upper electrode body 27.
is located. This photoelectric detector 42 detects a rebound portion 2a generated at the end of the wound metal strip 2 by the initial spot welding as shown in FIG.
(The length of the floating part) is detected. Even if the winding core 17 is rotated according to the remaining winding length after the metal band 2 is cut at the cutting part 14, this rebound part 2a may occur due to variations in the shape of the metal band 2, winding tension, etc. The length is approximately 5 mm.

Then, the photoelectric detector 42
When the length of the winding core 1 is detected, the detection signal
7 is rotated by an angle corresponding to the length of the rebound portion 2a, and a portion within 1 mm from the end of the rebound portion 2a corresponds to the tungsten tip 38 of the upper electrode body 26, and is spot welded again. Become. Therefore, it is possible to eliminate the rebound portion 2a from the metal band 2 which has been wound and then terminated, as shown in FIG.

Next, the operation when winding the metal band 2 will be explained. First, the clamper 5 holding the end (starting end) of the metal strip 2 is driven in the direction approaching the winding core 17, and the starting end is moved toward the fitting part 18 of the winding core 17 as shown in FIG. 9a. Located above. Then,
The presser rod 19 is driven downward by the third cylinder 21 so that its end engages the fitting portion 18 as shown in FIG. 9b. As a result, the starting end of the metal band 2 is clamped and fixed between the inner surface of the fitting portion 18 and the end of the presser rod 19.

When the starting end of the metal band 2 is clamped between the winding core 17 and the presser rod 19 in this way, the winding core 17 and the presser rod 19 are integrally joined by a clamper (not shown), and then, as shown in FIG. is rotated in the direction shown by the arrow. Thereby, the metal band 2 is connected to the fitting portion 18 of the winding core 17 as shown in FIG. 9c.
and the presser rod 19.

When the winding length of the metal band 2 reaches a predetermined length and this is detected by the third guide roller 4c, the winding core 17 and the presser rod 1 are
9 stops rotating. At the same time, the clamper 23 operates to hold a portion of the metal band 2 upstream of the cutting part 14 by a predetermined length, and the cutting part 14 is driven to wind the metal band 2 by the cutter 15. The remaining portion is cut to a predetermined length.

When the metal strip 2 is cut, the winding core 17 is rotated by the number of revolutions corresponding to the length of the unwound portion.
and the presser rod 19 are rotated again, and the previously unwound portion of the metal strip 2 is wound. When the winding of that part is completed, the lower electrode body 26 and the upper electrode body 27 of the welding mechanism 25 are driven in the direction to approach each other, as shown in FIG. 9d, and receive the wound metal strip 2. Electrode 29
and a pressure electrode 39, and the tungsten tip 38 of the pressure electrode 39 spot-welds the terminal end of the metal band 2. At that time, the end of the metal strip 2 has a rebound portion 2 of about 5 mm as described above.
a is generated and its length is detected by the photoelectric detector 42. Then, the winding core 17 is
After the holding rod 19 is rotated in the direction shown by the arrow in FIG. 9d at an angle corresponding to the length of the rebound portion 2a, a spot within 1 mm from the end thereof is spot welded again. Thereby, the 9th
As shown in Figure e, the rebound portion 2a at the end of the wound metal strip 2 can be eliminated.

After the end of the metal strip 2 is processed in this way, the presser rod 19 is moved by the fourth cylinder 22.
is driven in the direction in which it is disengaged from the fitting portion 18 of the winding core 17, thereby causing this presser rod 19 to move as shown in FIG.
The metal strip 2 is extracted from the wound metal strip 2 as shown in FIG. At this time, since the presser rod 19 is in contact with the metal band 2 only about half of its outer circumference,
The metal band 2 can be pulled out with light force and without damaging the wound state of the metal band 2.

When the presser rod 19 is pulled out in this way, only about half of the inner circumference of the metal band 2 is in contact with the winding core 17, so press the metal band 2 by an appropriate means. It can be removed from the winding core 17 by sliding it in the direction shown by the arrow in FIG. 9f.

[Effects of the Invention] As described above, the present invention sandwiches the starting end of a metal band with a pipe-shaped winding core with a part of the peripheral wall cut out and a presser rod inserted into this winding core, and By rotating the winding core and presser rod, the metal strip is wound, a predetermined length from the end of the metal strip is first spot welded, and then the length of the raised end is detected. Then, the end portion was spot welded again. Therefore, the metal strip can be wound without using plastic film as in the past, which not only improves work efficiency, but also improves workability.
Even a highly rigid metal band can be wound reliably. Furthermore, since the ends of the metal strips are spot welded and processed to prevent floating, work efficiency and yield can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic diagram for explaining the operation, Fig. 2 is a front view of the device, Fig. 3 is a side view of the winding core and presser rod, and Fig. 4
The figure is a front view of the welding mechanism, Figure 5 is a side sectional view, Figure 6 is a perspective view of the wound metal strip after the first spot welding, Figure 7 is a front view, This figure is a perspective view of a state in which the second spot welding has been performed, and FIGS. 9a to 9f are explanatory views sequentially showing the operation of winding the metal band. 2... Metal band, 3... Ribbon spool (supply section), 6... Drive section, 8... Detection section (first length detection section), 17... Winding core, 18... Fitting section, 19
... Presser rod, 25 ... Welding mechanism (processing means),
42...Photoelectric detector (second length detection section).

Claims (1)

[Scope of Claims] 1. A first step of clamping and fixing the starting end of the metal band by a pipe-shaped winding core with a part of the peripheral wall cut out and a presser rod inserted into the winding core; a second step of rotating the winding core and presser rod together and winding the metal band around the outer peripheral surface of the core to a predetermined length; and a terminal end of the metal band wound around the winding core. A third step of spot welding a predetermined length from the end of the metal strip to prevent it from coming undone, and a length of the part that floats above the end of the metal strip resulting from this third step. A fourth step is to spot weld the end of the raised portion of the metal strip by detecting the length and rotating the winding core by a rotation angle corresponding to the length.
and a fifth step of sequentially extracting the presser rod and the winding core from the metal strip wound around the winding core and having the terminal end spot welded. How to wind the obi. 2. A supply unit that supplies the metal strip, a pipe-shaped winding core with a part of the peripheral wall cut out, and a presser rod that is inserted into the winding core and clamps and fixes the starting end of the metal strip with the winding core. , a drive unit that rotationally drives the winding core and the presser rod to wind the metal band around the outer periphery of the winding core, and a first detection unit that detects the length of the metal band wound around the winding core. a cutting section that cuts the metal strip in response to a detection signal from the first detection section; and a section at a predetermined length from the terminal end of the metal strip cut by the cutting section and the terminal section. a welding mechanism for welding the part to the wound part of the metal strip, and a floating part from a predetermined length from the terminal end of the metal strip welded by this welding mechanism to the terminal end; a second length detection section that detects the length and outputs a detection signal for welding the terminal end to the welding mechanism; and a second length detection section that detects the length and outputs a detection signal for welding the terminal end to the welding mechanism; 1. A metal band winding device characterized by comprising a winding core and a means for sequentially extracting the winding core.