JPS61226467A - Device for change in winding of very fine wire - Google Patents

Abstract

PURPOSE:To enable tension applied to a very fine wire to be automatically adjusted when a winding is newly started by providing a device with both a means which sets tension to be applied to the very fine wire in numbers of steps, and a timer which switches over the value set by the above mentioned means after the set time will elapse. CONSTITUTION:When a winding of a very fine wire is newly started, high tension is set to meet requirements just after a new winding has started with a high tension setting unit 30 activated. Simultaneously, low tension is also set to meet requirements after the set time which is set by a timer circuit 33 in advance, will elapse with a low tension setting unit 31 activated. Subsequently, a feed motor 36 and the like is started with a starting button depressed. This causes the set voltage Vh which corresponds high tension to be applied to a tension control circuit 34 permitting control voltage Vc which corresponds to high tension, to be applied to an electromagnet 19. After the time set in the timer circuit 33 has elapsed, the set voltage Vl which corresponds to low tension, is applied to the tension control circuit 34.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to an ultra-fine wire rewinding device for rewinding an ultra-fine wire such as a bonding wire from a feeding spool to a take-up spool.

"Prior Art" As is well known, various semiconductor devices have a diameter of about 25 mm.
Gold bonding wires with a diameter of approximately μm are used. This kind of gold bonding wire, ultra-fine wires such as aluminum, copper, palladium (with a diameter of lOμffi ~ 40μm)
In order to supply the user with the desired product quality, it is necessary to rewind the ultra-fine wire, which was once wound onto the spool at the time of manufacture, onto the product spool. In this case, in order to perform the rewinding work efficiently, it is necessary to rewind multiple product spools at the same time. Things were known. In this figure, reference numerals 1, . . . are feed-out spools from which the ultra-fine wire W is fed out, and each is detachably attached to a horizontally arranged feed-out shaft (not shown).

In addition, 2... are each fed out from the feeding spool -
The winding spools are winding spools for winding up ultra-thin wires W, and are each removably attached to one winding shaft 3 arranged parallel to the front surface P of the rewinding device. One end of the winding shaft 3 is connected to a rotating shaft of a winding motor M, and is horizontally moved in six directions shown by arrows by a winding shaft moving mechanism (path shown). In addition, at the position T shown in the figure, there is a tension adjustment mechanism (
(Illustrated paths) are provided respectively. By appropriately controlling the rotational speed of the motor M and the horizontal movement speed of the winding shaft 3, the winding pitch, etc. is adjusted, and the setting value of the tension setting device provided corresponding to each tension adjustment mechanism is adjusted. By adjusting , the tension acting on each ultrafine wire W is adjusted and rewinding is performed.

"Problems to be Solved by the Invention" Generally, the take-up spool 2 must be re-wound while adjusting the tension based on a predetermined standard pattern. High precision is required. However, in the above-mentioned conventional rewinding device, the ultra-fine wire W
Since the tension applied to the rewinding device (rewinding tension) was adjusted, a worker must always be on standby near the rewinding device, resulting in low work efficiency and difficulty in learning the timing for adjusting tension, etc. This requires long-term practice and skill. Furthermore, rewinding tension varies depending on the product because the tension adjustment timing etc. differ slightly depending on the worker, resulting in low reproducibility, and because one worker can only operate two tension setting devices at a time. There was a drawback.

This invention was made in view of the above-mentioned circumstances, and it is possible to automatically adjust the tension when rewinding.
The purpose of this invention is to provide an ultra-fine wire rewinding device that can save labor (reduce the number of personnel) and equalize the rewinding tension for each product.

"Means for Solving the Problems" The present invention provides an ultra-fine wire rewinding device that unwinds the ultra-fine wire from a feeding spool on which the ultra-fine wire is wound and rewinds the ultra-fine wire onto the take-up spool. tension adjusting means for applying tension to the ultra-thin wire to be changed; setting means for setting the tension applied by the tension adjusting means to the ultra-fine wire in a plurality of stages; The apparatus is characterized by comprising a timer means for switching the set value of the setting means when a set time has elapsed.

"Operation" After the rewinding operation is started, the tension applied to the ultra-fine wire to be rewound onto the take-up spool is automatically switched when a set time preset in the timer means has elapsed.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are a front view and a side view showing the external configuration of an embodiment of the present invention. In these figures, the same reference numerals are given to the parts corresponding to those in FIG. 5, and the explanation thereof will be omitted.

In the figure, 5 is a feeding spool drive mechanism provided at the upper part of the front surface P of the device, and is composed of a feeding shaft 6 and a feeding motor 36 (see FIG. 4) that rotationally drives this feeding shaft 6. has been done. A feeding spool 1 is detachably attached to each of these feeding shafts 6 via a spool holder 7. In this case, each of the feeding spool drive mechanisms 5 are spaced apart from each other in the vertical direction to enable attachment and detachment of the feeding spool l, and spaced apart from each other in the horizontal direction so that the fed out ultrafine wires W do not come into contact with each other. That is, they are arranged diagonally apart from each other.

On the other hand, 8... is a winding shaft that is arranged at the lower part of the front surface P of the device and protrudes perpendicularly to the front surface P of the device. It is moved in a direction protruding from the front surface P of the device (direction of arrow B shown in the figure) by an axis moving mechanism (path shown). A take-up spool 2 is detachably attached to each of these take-up shafts 8 via a spool holder 9. Moreover, above each winding shaft 8..., a second
As shown in the figure, there are provided guide sheaves 12 and 13 that are rotatably supported by a support column 11, and a tension adjustment mechanism 15 that has a movable sheave 14 that is movable in an arc shape in the vertical direction. This tension adjustment mechanism 15 is shown in FIG.
, is configured as shown in (b). In these figures, 18 is a case that accommodates an electromagnet 19 and a potentiometer (variable resistor) 20, and supports a rotation shaft 21. One end of this rotating shaft 21 is connected to a potentiometer 20 inside the case 18, and the rotation angle (rotational displacement amount) of the rotating shaft 21 is detected by this potentiometer 20. on the other hand,
A metal plate 22 and an arm 23 are attached to the other end of the rotation shaft 21 protruding from the case 18. Arm 23
A movable sheave 14 is rotatably attached to the distal end of the movable sheave 14 via a shaft 24, so that the movable sheave 14 can be rotated about the rotation shaft 21. Further, a spring 25 is provided between the arm 23 and the case 18 to maintain the movable sheave 14 in the position shown in the figure. Here, the electromagnet 19 inside the case 18 attracts the metal plate 22 with an electromagnetic attraction force proportional to the voltage supplied from the outside.
The arm 23 is arranged so as to attract the fan-shaped part in the direction of the arrow C shown in the figure.
5, and is rotated by an amount proportional to the voltage. And the feeding spool l
As shown in FIG. 2, the ultra-fine wire W unwound from the A tension proportional to the voltage applied to the electromagnet 19 is applied to the wire W. That is, as the voltage applied to the electromagnet 19 increases, the movable sheave 14 moves downward, and the tension acting on the ultrafine wire W increases, and conversely, as the voltage decreases, the movable sheave 14 moves downward.
4 moves upward, and the tension acting on the ultrafine wire W becomes smaller.

Next, the electrical configuration of the above-mentioned embodiment will be explained with reference to FIG. 4. In this figure, 30 is a high tension setting device for setting high tension, 30 is a low tension setting device for setting low tension, and 32 is a start button, which are arranged at the bottom of the front surface P of the device (No. 1) and is connected to the timer circuit 33. The timer circuit 33 starts timing operation when the start button 32 is pressed,
After this point, the set voltage vh supplied from the high tension setting device 30 is supplied to the next stage tension control circuit 34, and then, after a preset set time (for example, 0 to 100 hours) has elapsed, the timing operation is started. At the time of completion, the setting voltage Vl supplied from the low tension setting device 30 is supplied to the tension control circuit 34 instead of the setting voltage vh. Tension control circuit 34
A control voltage Vc corresponding to the set voltage vh or Vl supplied from the timer circuit 33 is applied to the electromagnet 19 of the tension adjustment mechanism 15, thereby controlling the tension acting on the ultrafine wire W. On the other hand, 35 is a feeding motor control circuit, which controls the feeding motor based on the detected voltage Vs of the potentiometer 20 of the tension adjustment mechanism 15 and the voltage output from the tacho generator 37 connected to the rotating shaft of the feeding motor 36. Controls the rotation of 36. As a result, the rotation of the feeding spool l is controlled by the upper and lower positions of the movable sheave 14, and when the position of the movable sheave 14 is high, the feeding spool l rotates quickly, and the movable sheave I4
When the position of is low, the feeding spool l rotates slowly. If the take-up spool 2 rotates relatively faster than the pay-out spool 1, the movable spool 1
4 moves upwards, and the rotation of the feeding spool 1 becomes faster. On the other hand, if the rotation of the take-up spool 2 rotates slower than the feeding spool l, the movable sheave 14 moves downward, and the rotation of the feeding spool 1 becomes faster. rotation becomes slower. That is,
The feed spool 1 is synchronized with the rotation of the take-up spool 2 and always rotates at the same speed. The above-mentioned high tension setting device 30, low tension setting device 31, and timer circuit 33
, tension control circuit 34 and feeding motor control circuit 35
etc. are each feeding spool drive mechanism 5... and tension adjustment mechanism 1
5, etc., and the start button 32 is shared.

In the above configuration, when rewinding the ultra-fine wire W wound around the feeding spool l, first, the feeding spool! ... are attached to the feeding shaft 6..., and the starting ends of the ultra-fine wires W pulled out from each feeding spool are attached to the take-up spools 2... with adhesive tape, and then the high tension setting device 30 is operated. The high tension required immediately after the start of the rewinding operation (e.g.
19 to 5 g) and operate the low tension setting device 31 to start the rewinding operation and then set the required low tension (for example, 19 to 5 g) after the set time preset in the timer circuit 33 has elapsed. 3g). Next, start button 3
When 2 is pressed, the winding motor and the feeding motor 36 are activated to start the rewinding operation. In this case, the timer circuit 33 starts timing operation when the start button 32 is pressed, and the set voltage vh corresponding to the high tension set in the high tension setting device 30 is set in the tension control circuit 3
4, and a control voltage Vc corresponding to high tension is applied to the electromagnet 19. As a result, the ultra-fine wire W is re-wound onto the take-up spool 2 with high tension. Next, when the set time preset in the timer circuit 33 has elapsed and the timing operation is completed, the set voltage Vl corresponding to the low tension set in the low tension setting device 30 is replaced with the set voltage Vh.
is supplied to the tension control circuit 34. As a result, the control voltage Vc applied to the electromagnet 19 is reduced to a value corresponding to the set voltage Vl, and the ultrafine wire W is rewound onto the take-up spool 2 with low tension. In this way, start button 3
By simply pressing 2, the tension will be automatically switched from high tension to low tension after the time set in the timer circuit 33 has elapsed. In addition, in the above-mentioned embodiment, the tension applied to the ultra-fine wire W was configured to be switched in two stages from high tension to low tension. The invention can be applied without departing from the spirit of the invention, such as configuring the invention.

"Effects of the Invention" According to the present invention, there is provided a tension adjustment means for applying tension to the ultra-fine wire to be re-wound onto the take-up spool, and the tension that the tension adjustment means applies to the ultra-fine wire is set in multiple stages. Since a setting means and a timer means for switching the set value of the setting means when a preset time has elapsed after the start of the rewinding operation are provided, the tension adjustment at the time of rewinding can be automatically performed. This has the effect of saving labor (reducing the number of personnel) and making the rewinding tension uniform for each product.

[Brief explanation of the drawing]

Figures 1 (A) and (B) are front and side views showing the external configuration of an embodiment of the present invention, Figure 2 is a perspective view showing a partial configuration of the same embodiment, and Figure 3 (A). and (b) are side and front views showing an example of the configuration of the tension adjustment mechanism used in the same embodiment, FIG. 4 is a block diagram showing the electrical configuration of the same embodiment, and FIG. 5 is a conventional multiplex tension adjustment mechanism. FIG. 2 is a schematic diagram for explaining the arrangement of a mold rewinding device. W: Extra fine wire, L: Feeding spool,
2... Take-up spool, 6... Payout shaft,
8... Winding shaft, 15... Tension adjustment mechanism, 19... Electromagnet, 20... Potentiometer, 30... High tension setting Vessel, 31...
...Low tension setting device, 32...Start button, 33...Timer circuit, 34...Tension control circuit. Figure 4

Claims (1)

[Claims] In an ultra-fine wire rewinding device that unwinds the ultra-fine wire from a pay-out spool on which the ultra-fine wire is wound and rewinds the ultra-fine wire onto a take-up spool, a tension adjustment means applies tension to the ultra-fine wire that is re-wound onto the take-up spool. a setting means for setting the tension applied to the ultra-fine wire by the tension adjustment means in a plurality of stages, and a setting value of the setting means at the time when a preset time has elapsed after the start of the rewinding operation. 1. A superfine wire rewinding device characterized by comprising a switching timer means.