JP2007308265A - Bonding wire winding device and winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably wind a wire on a spool by eliminating deviation from a wire travel line, deformation, surface damage and breakage of the wire caused by sharp fluctuation of wire tension and excessive wire tension generated by a mechanical tensioning mechanism and a tensioning mechanism by a conventional pulley or the like. <P>SOLUTION: The wire is wound on the spool while being tensioned in non-contact by applying air resistance force and gravity to the wire in a state of attracting the wire to the winding spool by electrostatic attracting force. After winding, electric charge charged to the wire is eliminated by an electrostatic eliminating mechanism. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for winding a wire around a spool in the manufacture of a bonding wire (hereinafter abbreviated as “wire”) used to connect an electrode on a semiconductor element and an external lead.

  The wires used to connect electrodes on semiconductor elements and external leads have recently become thinner with the miniaturization of semiconductor packages, and the wire diameter has shifted from the current 0.020 mm to 0.008 to 0.010 mm. Is expected.

Such wire thinning reduces the bending rigidity and breaking strength against tension, and has a great influence on the handleability of the wire in the manufacturing process. When winding a wire on a spool in the manufacturing process, it is necessary to wind the wire while applying tension to prevent the wire from collapsing after winding. If the tension exceeds the breaking strength of the wire during winding, there is a problem that the wire breaks, resulting in a defective product that does not reach the predetermined length to be wound.
In the conventional winding device, a tension of 10 to 15 mN is applied to the wire. Since the conventional wire having a wire diameter of 0.020 mm has a breaking strength of about 80 mN, it rarely breaks against the above tension. However, the breaking strength of ultrafine wires having a wire diameter of 0.008 to 0.010 mm is only about 20 mN, and disconnection may occur when the tension described as 10 to 15 mN further varies.

For such a fine wire, the tension applied during winding should be reduced in consideration of its breaking strength. However, in the conventional winding device, it is difficult to generate a weak tension corresponding to the extra fine wire. Hereinafter, the conventional winding device and its tension generation characteristics will be described in detail with reference to FIG.
In FIG. 1, a supply spool 1 and a take-up spool 4 are detachably mounted on a set of rotating shafts (not shown) installed at a distance from each other. The wire is unwound from the supply spool 1 and wound on the take-up spool 4. As a tension applying mechanism and a wire guide mechanism, two pulleys having fixed shaft positions are rotatably installed on a linear traveling path of a wire traveling between the supply spool 1 and the take-up spool 4. Under these pulleys, a swingable tension arm 2 biased by a spring is installed, and a pulley 3 pivotally supported at the tip of the tension arm 2 is installed.
The wire unwound from the supply spool is passed to the take-up spool 4 through two pulley grooves whose axial positions are fixed, and the wire stretched between these pulleys is drawn downward to enter the groove of the pulley 3. By multiplying, a V-shaped travel route having a variable height is obtained.
When winding a wire using such a conventional winding device, the winding diameter of the wire on the supply spool 1 decreases as the winding proceeds, while the winding diameter of the wire on the winding spool 4 increases. The wire between the two spools becomes tense due to insufficient supply. When the wire is tensioned on the wire travel path, the pulley 3 positioned at the bottom of the V-shaped path is temporarily lifted upward against the force of the spring biasing the V-shaped path downward. Attempts to relieve wire tension by reducing the height of the glyph path.
However, the shortening of the V-shaped path cannot keep up with the increase in the difference between the unwinding amount and the winding amount. Therefore, in the prior art, the rotation speed of the spool drive shaft is controlled together with the tension applying mechanism shown in FIG. In other words, the rotational speed of the spool is adjusted so as to obtain a balance between the wire unwinding amount and the winding amount. However, it is not possible to obtain a complete balance constantly due to a lack of rotational speed control accuracy or the like, and an average balanced state is obtained while repeatedly increasing and decreasing. The lifting / lowering operation of the pulley 3 absorbs the increase / decrease in the amount of wire traveling between the two types of spools.
Such a lifting and lowering operation of the pulley 3 is realized by the swing of the tension arm 2 suspended by a spring, and the magnitude of the tension that the wire pulls up the pulley 3 and the strength of the spring that biases the pulley 3 downward. The speed of the lifting and lowering operation of the pulley 3 is determined by the magnitude of the inertial mass of the pulley or the like that swings due to the difference between these forces. If the wire tension or spring force is sufficiently large with respect to the inertial force of the pulley or the like, the pulley 3 can move without being separated from the wire, and there is no problem that the wire is detached from the pulley groove and derailed.
However, when the wire is thinned, the breaking strength of the wire is reduced, and as the tension that can be applied to the wire is reduced, the force of the spring that biases the pulley 3 downward needs to be weakened. If the wire tension or the spring force becomes smaller than the inertial force of the pulley or the like, the followability of the pulley 3 is deteriorated. In some cases, the wire is no longer in contact with the pulley 3 and is released from the pulley groove as described above. The conventional contact tension applying means using a tension arm, a pulley, etc. has a limit in reducing the inertial force of these mechanisms having a mass much larger than that of the wire, making it impossible to adapt to the thinning of the wire. Have a problem.

  Therefore, the inventor has fundamentally reviewed the above-described conventional mechanical tension adjusting mechanism and sought a new tension adjusting mechanism that eliminates contact with the wire. There are gravity, magnetic force, electrostatic force and the like as means for applying force to the object without contact. Among these, magnetic force cannot be used for objects that are not magnetized, such as Au and Cu, and gravity acts in a limited direction and the usage method is limited, while electrostatic force attracts objects that attract each other. It has been considered that it is suitable as a means for attracting and holding the wire on the spool when the wire is wound around the cylindrical spool.

  As a result of investigating a known technique using static electricity, there is a technique for transporting an insulating and soft long object with a roll or the like. For example, Patent Document 1 discloses a technique for laminating a film by applying static electricity. However, this technique is applied to a tape-shaped material made of resin that has a sufficient dimensional and strength compared to a wire. Although this method can achieve the purpose of adsorption by static electricity, there is no disclosure of a technique for an object to be adsorbed that has a conductivity that makes it difficult to stably hold static electricity. There was a problem of insufficient technology.

  Patent Document 2 discloses a technique for adsorbing and conveying a metal sheet and an interleaf sheet sheet as a known technique related to an object to be adsorbed having conductivity. However, this technology belongs to the printing technology, and cannot be applied to a wire that requires multiple windings of a non-rigid adsorption object.

These document known inventions are techniques for temporarily adsorbing an object to be adsorbed for the purpose of conveyance or the like. Therefore, after winding is completed, there is a problem that a technique that satisfies the requirement of the present invention for which static electricity must be removed promptly is not disclosed.
JP 2003-206450 A Japanese Patent Laid-Open No. 11-43259

  SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention reduces the concentration and variation of tension generated in a wire when winding an ultrafine wire, and keeps the absolute value low, and winds the wire at high speed without damage. It is an issue to provide.

  In addition, the wire that is the subject of conductive adsorption, which was a problem with conventional electrostatic adsorption technology, can be stably adsorbed, and the wound wire and spool can be wound to prevent harmful static electricity from remaining on the semiconductor device. Providing an apparatus and method is also a problem to be solved.

The first invention of the present application is a winding device for winding a wire unwound from a wire supply spool in a wire manufacturing process onto a winding spool,
1) Two rotation driving devices installed at intervals, which are detachably mounted and pivotally mounted with a wire supply spool and a take-up spool,
2) An electrically insulated state is maintained between the wire wound on the wire supply spool and at least the take-up spool;
An adsorption mechanism that adsorbs the wire unwound from the wire supply spool to the take-up spool by static electricity;
3) a tension applying mechanism that applies tension to the wire running between the wire supply spool and the take-up spool in a non-contact manner; and 4) a static elimination mechanism that removes static electricity from the wire charged with static electricity. Is a wire winding device.

The second invention of the present application is the above first invention,
1) The wire adsorption mechanism due to static electricity is a charging mechanism that charges the take-up spool at the time of winding.
2) The static elimination mechanism that removes static electricity from the wire is a conduction mechanism that grounds both the charged wire and the take-up spool to the ground after the winding is completed.
3) The wire winding device is characterized in that either the charging mechanism or the conduction mechanism is selectively and exclusively electrically connected to the winding spool by a common switch.

According to a third aspect of the present invention, in the first and second aspects of the invention, of the wire supply spool and the take-up spool,
1) At least the take-up spool is formed entirely of a conductive material, and
2) A wire winding device characterized in that at least a winding drum portion of the surface layer in contact with the wire to be wound is an extremely thin insulating layer.

A fourth invention of the present application is the tension applying mechanism according to the first, second and third inventions, wherein a tension is applied to the wire running between the wire supply spool and the winding spool in a non-contact manner.
Compressed air is jetted toward a wire from a total of three directions including a pressurizing direction for applying tension to the wire and at least two directions perpendicular to the pressurizing direction, and tension is applied to the wire by air resistance. It is a winding device.

A fifth invention of the present application is the first to fourth inventions, further comprising a deflection amount detection mechanism for detecting a deflection amount of the wire traveling between the wire supply spool and the winding spool,
The wire deflection amount is controlled so that the wire deflection amount falls within a certain range by feeding back a detection signal of the wire deflection amount to a rotation supply control device that controls the rotation of the wire supply spool and the winding spool. Is a winding device.
According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the wire winding device attracts the wire to the spool using electrostatic force, applies tension without contact, and travels between the spools. The wire winding method is characterized in that winding is performed while controlling the rotational driving speed of the spool so that the amount of bending is within a certain range using a detection signal of the amount of bending of the wire.

The present invention eliminates a mechanical tension applying mechanism and a guide mechanism such as a pulley that causes steep force concentration and fluctuation, and in place of this, the wire is adsorbed on the take-up spool by electrostatic adsorption force, A mechanism that winds the wire by applying tension to the wire by the gravity acting on the wire is adopted, and the amount of unwinding and winding due to changes in the winding radius with the progress of the rewinding work, etc. For imbalance, a feedback signal from the wire deflection detection mechanism is sent to the spool rotation control mechanism to correct the above imbalance, so that the wire travels during the initial rewinding operation. The state is maintained until the end of winding, and the fluctuation of the force applied to the wire is extremely small throughout the rewinding operation, and the value thereof is lowered. Furthermore, since the bending amount detection mechanism detects the wire in a non-contact manner, the detection mechanism does not apply undue tension to the wire.
This eliminates the deviation of the traveling path, the deformation of the wire, the surface damage, and the breakage that have conventionally occurred in the fine wire, and enables stable winding on the spool. In addition, since both the take-up spool and the wire wound on the take-up spool are neutralized after winding, dust or the like is not adsorbed during storage or transportation, and a device or wire for connecting the wire is assembled. There is no worry of static electricity causing damage to electronic devices that can be found.

  Therefore, in the ultrathin wire, there is an effect of preventing the occurrence of a spool wound product that causes a decrease in yield without being commercialized because it is less than the specified winding length due to the above-described problem. In addition, the cost required for repairing the consumable parts contacting the wire of the winding device, which has been necessary in the past, is unnecessary, and there is an effect that there is no loss of process pause that has occurred for these maintenance operations.

First, in configuring the winding device of the present invention, a rotation driving device for a wire supply spool is installed on a winding device frame via an insulator. On the other hand, a rotary drive device having a spindle for a take-up spool is installed on a take-up device stand in a state of being electrically insulated via a moving table that reciprocates linearly in the axial direction of the spool. The moving table is installed to wind the wire so that the winding diameter of the wire is uniform in the width direction of the winding drum.
Further, the static electricity generator is fixed to the winding device base in an electrically insulated state. A changeover switch is fixed to the winding device mount via an insulating material. The common terminal of the changeover switch is electrically connected to the spindle of the rotary drive device for the take-up spool. One connection terminal of the changeover switch is electrically connected to the output terminal of the static electricity generator, and the other terminal is electrically connected to the ground. In other words, by switching the changeover switch, the winding spool forms a circuit so that it can be selected to conduct either the static electricity generator or the ground via the spindle.
Next, a configuration of a tension applying mechanism using air pressure will be described. The tension applying mechanism is formed in a groove-shaped block shape having a U-shaped cross section, and is installed on the winding device mount. On the inner surface of the groove, a nozzle row in which compressed air nozzles are attached to each of the three sides appearing in the U-shaped cross section toward the center of the U-shape, and at least the length of the groove including the vicinity of the front and rear ends of the groove. Arrange multiple sets in the direction. The position where the tension applying mechanism is installed on the plane including the cross section of the wire is a position where the wire passes through the approximate center of the U-shaped cross section in a state where the wire is stretched between the two types of spools without bending. The installation position of the tension applying mechanism in the longitudinal direction is approximately the center position between the two types of spools. The open end of the U-shape is installed in the direction perpendicular to the take-up spool axis. By doing so, the bending direction of the wire in the tension adjusting mechanism is orthogonal to the axial direction of the winding spool, and the amount of bending of the wire is wound on the winding spool to the wire winding pitch. You can avoid affecting.
Further, the non-contact type wire detector is positioned in accordance with the allowable range of the amount of bending of the wire in the tension applying mechanism, and the plurality of sets of bending amount detecting mechanisms are arranged at substantially the center in the longitudinal direction of the groove of the tension applying mechanism. Install in position.
Next, the configuration of the spool will be described. First, the take-up spool is formed using a conductive material, and a thin insulating film is formed on the surface portion of the spool winding drum that contacts the wire. The inner diameter portion and the flange portion of the take-up spool are not provided with an insulating coating. The reason why the insulating film is not provided on the inner diameter portion of the winding drum is to electrically connect the take-up spool to the static electricity generator or the ground via the spindle in contact therewith. Also, the reason for not providing an insulating film on the outer side of the flange is that after winding the wire, the end of winding of the wire is brought into contact with the outer side of the flange, so that the wire, take-up spool, spindle and changeover switch are It is for passing through in order and performing a static elimination by making a wire ground fault. The insulation film is formed on the other part of the take-up spool. When the wire is taken up, a method is adopted in which the take-up spool is charged and the wire is adsorbed to the winding body. This is because when both are electrically connected, both have the same potential and the attraction force disappears, so it is necessary to avoid conduction.
On the other hand, the wire supply spool is formed using an insulating material. This is because the material is suitable for stably maintaining the electric polarization state generated in the wire by the electrostatic induction action with the take-up spool charged by the static electricity generator. These two types of spools are detachably attached to the respective rotary drive devices.
A controller for cooperatively controlling the rotation of the wire supply spool rotation drive device and the take-up spool rotation drive device is connected to these drive devices, and these are connected so that a signal from the wire detector is transmitted to the control device. .
In the use of the wire winding device of the present invention configured as described above, the changeover switch is switched so that the winding spool and the static electricity generating device are conductive, and the static electricity generating device is operated to charge the winding spool. . The charging voltage obtained by the static electricity generator is adjusted in the range of −2 to −11 KV according to the characteristics of the target wire or the like.
Until the generated voltage of the static electricity generator becomes stable, the wire supply spool that has been drawn and wound in from the previous process is attached to the spindle of the rotary drive device for the wire supply spool. Also, the empty take-up spool is attached to the spindle of the rotary drive device for the take-up spool.
The winding end of the wire wound on the wire supply spool is rewound and passed through the U-shaped groove of the tension applying mechanism, and is attracted to the surface of the winding body of the winding spool that is charged.

Two types of spools were driven at a low speed by the control device while maintaining charging, and after winding the wire end portion around the winding spool by a certain amount, compressed air was ejected from the tension applying mechanism to apply tension to the wire. In this state, the rotation speeds of the two types of spools are increased, and all the wires wound on the wire supply spool are wound around the winding spool. While the take-up spool is rotating, the moving table is controlled so that the wire to be taken up is uniformly distributed and wound in the axial direction of the spool, and the take-up spool mounted on the rotary drive device is reciprocated in the axial direction. Move linearly. After the rewinding, the rotation of both rotary drive devices is stopped, the jet of compressed air is stopped, and the static electricity generator is stopped.
During the winding operation, the wire supply spool rotation driving device basically rotates in synchronization with the rotation speed of the winding spool rotation driving device due to the action of the control device. Inconsistency between the unwinding amount and the winding amount due to changes in the winding radius of the wire. This discrepancy between the unwinding amount and the winding amount appears as a change in the amount of bending of the traveling wire.
The deflection amount detection mechanism detects the position of the wire traveling in the tension applying mechanism, and transmits a signal to the control device when the deflection amount of the traveling wire exceeds an allowable upper limit and lower limit. When the wire is bent beyond the upper limit of the amount of bending, the control device sends a corresponding signal to the wire supply spool rotation driving device, and controls to reduce the rotation speed of the wire supply spool by this signal. . Conversely, when the wire travels exceeding the lower limit of the deflection amount, the control device sends a corresponding signal to the wire supply spool rotation drive device, and controls to increase the rotation speed of the wire supply spool by this signal. To do.

  The end of the wound wire is fixed with a tape or the like to the conductive portion of the winding spool from which insulation is partially removed.

  Thereafter, the changeover switch connecting the take-up spool and the static electricity generating device is switched to ground the take-up spool, thereby neutralizing the take-up spool and the wire connected to the end of the wire. By eliminating the static electricity, there is no fear of adsorbing dust when the take-up spool is stored, and there is no possibility of causing trouble due to static electricity when the take-up spool is attached to the bonding apparatus.

  As a method of applying tension to the wire during winding, in addition to the method of applying tension by jetting compressed air, a method of applying tension to the wire with the weight of the wire itself passed between the two types of spools. It may be adopted. The former method can apply a strong tension beyond the range of the weight of the suspended wire by adjusting the compressed air pressure. The method is suitable for thin wires that cannot be subjected to strong tension. Even in the case of adopting the latter method, it is possible to use a deflection amount detection mechanism similar to the former, and the control device to control the rotation speed of the wire supply spool based on the wire position detection signal from the deflection amount detection mechanism. This is the same as the rotation control in the former case where tension is applied by air.

  In this example, a cylindrical ingot having a diameter of 25 mm was prepared by a melt casting facility (not shown), and after rolling it, a wire having a diameter of 0.010 mm was obtained by repeating wire drawing with a die and intermediate annealing. The wire is rewinded.

  Samples selected for winding were 2N (gold purity 99% by mass) alloy wire and 4N (gold purity 99.99% by mass) wire, and the elongation was 1 to 3.5% by the final heat treatment. Adjusted as follows.

Hereinafter, the embodiment shown in FIG. 2 will be described in detail. The winding device of the present invention was unwound from a drive device 6 that attaches a supply spool 1 that winds up the wire 7 manufactured by wire drawing and final heat treatment and winds it out in the previous step. A spindle 11 to which the take-up spool 4 for winding the bonding wire 7 is attached and a drive device 12 for rotationally driving the shaft and reciprocating linearly in the axial direction are provided with a distance between the centers of the spools of about 300 mm in the vertical direction. A common terminal of the changeover switch 9 is connected to the spindle 11, one of the open / close terminals of the changeover switch 9 is connected to the static electricity generator 8, and the other is connected to the ground 10.
Further, a tension applying mechanism 5 having a U-shaped cross section having a length of 40 mm in the traveling direction of the wire is provided on the path of the wire 7 that travels between both spools attached to the driving device. Is installed in a direction perpendicular to the axis of the take-up spool 4. The tension applying mechanism 5 is formed with a flow path of compressed air inside the U-shaped cross section, and the three sides of the U-shape are substantially perpendicular to the respective sides toward the wire passing through the inside of the U-shape. Install the compressed air nozzle. Two sets of such nozzle sets are attached at intervals of 20 mm in the running direction of the wire. Between the two sets of nozzles, a deflection amount detection mechanism 14 having two sets of light projecting / receiving type detectors for detecting the traveling position of the wire is installed. Each set of light projecting / receiving type detectors is attached so that the two sets can be independently moved and positioned in the direction parallel to the two parallel sides of the U-shape and perpendicular to the traveling direction of the wire. Each set of the light projecting / receiving type detectors is fixed at a position where the width of the allowable traveling region of the wire, that is, the upper and lower limits of the deflection amount of the traveling path of the wire can be detected.

  The supply spool 1 used in the present invention is made of polyethylene. This material has an insulating property that is convenient for stably maintaining the charge of the charged wire 7 and can be manufactured at low cost.

  On the other hand, the take-up spool 4 uses a light aluminum material and anodizes the surface. The winding spool 4 had the same dimensions as those conventionally used for shipping products, and the winding drum had a diameter of 50.3 mm. However, the inner diameter portion of the winding drum and the outer surface of the flange are not provided with an alumite film.

    When winding is performed by the apparatus of the present embodiment configured as described above, the static electricity generating device 8 and the winding spool 4 are electrically connected via the spindle 11 by the changeover switch 9 to operate the static electricity generating device 8. . The charging voltage generated by the static electricity generator was set to -5 KV.

  The supply spool 1 around which the wire 7 that has been drawn in the previous process is wound is attached to the driving device 6. Further, the empty take-up spool 4 is attached to the spindle 11 of the drive device 12. As a result, the take-up spool 4 is charged.

  After the end of the wire 7 wound around the supply spool 1 is unwound and passed through the U-shaped groove of the tension applying mechanism 5, it is brought into contact with and adsorbed to the winding drum of the charged wire take-up spool 4.

  Both the driving device 6 and the driving device 12 are rotated at a peripheral speed of the winding drum of 2 m / min, and the wire 7 is wound around the winding drum of the winding spool 4 by 10 to 20 turns. Thereafter, compressed air is supplied to the tension applying mechanism 5, and the guiding wire 7 is supported by the air pressure blown from three mutually perpendicular surfaces of the U-shaped cross section without contacting the components of the tension applying mechanism 5. A constant tension is applied to the wire by the air resistance that the wire receives in the direction away from the spool. The deflection amount detection mechanism 14 detects the position of the wire 7 and sends this signal to the control device 13 of the driving devices 6 and 12. The control device 13 controls the number of rotations of the drive devices 6 and 12 so that the traveling position of the wire 7 detected by the deflection amount detection mechanism 14 is within an allowable range of the predetermined deflection amount, and moves the drive device 12 in the rotation axis direction. A reciprocating linear motion is performed to form a cross winding in which the wound wires 7 are stacked one layer at a time across the width of the winding drum.

  When the winding is performed at a low speed, the rotation of both drive devices is accelerated, and the winding of the winding drum at a high circumferential speed of 50 m / min is continued until all the wires 7 are wound. After all the wires 7 are wound up, both drive devices are stopped, the supply of compressed air is stopped, and the static electricity generator is stopped.

    The end of the wire 7 is taped to the outer side of the flange of the take-up spool 4. Finally, the change-over switch 9 is switched to connect the charged take-up spool 4 to the ground 10 via the spindle 11. As a result, the take-up spool 4 is neutralized, and the wire 7 that is electrically connected to the winding spool 4 is also neutralized. The take-up spool 4 is removed from the spindle 11 and shipped and packed.

Below, the conditions and data in comparison with the conventional winding method are shown.
Implementation comparison test conditions (tension conditions)
Condition 1 Tension with conventional pulley and tension arm: 14.7mN
Condition 2 Tension with conventional pulley and tension arm: 9.8mN
Condition 3 Tension according to the method of the present invention: tension by compressed air pressure supplied to the tension applying mechanism 5 (using nozzles directed at the wire 7 from three mutually perpendicular directions installed at two upper and lower positions at intervals of 20 mm, 1 L per minute Set to flow rate.)
[Circumferential speed]
Both the conventional example and the example were set to 50 m / min (during high-speed rotation) in all the tests this time.
Table 1 shows a list of evaluation test conditions and results. In the embodiment of the present invention, the wire was wound up without causing any defect over the entire length of the wire.

  The present invention is not limited to the application to a wire, but is a technique that can be used for handling a long object that is easily damaged, such as winding up, which is a problem of remaining static electricity.

Is a perspective view of essential parts of a winding device for explaining the prior art, These are the perspective views of the winding device which shows the Example of this invention.

Explanation of symbols

1. Supply spool 2. Tension arm Pulley 4. 4. Take-up spool 5. Tension applying mechanism Driving device 7. Bonding wire8. Static electricity generator 9. Changeover switch 10. Earth 11. Spindle 12. Drive device 13. Control device 14. Deflection detection mechanism

Claims (6)

A winding device for winding a wire unwound from a wire supply spool in a bonding wire manufacturing process onto a winding spool,
1) Two rotation driving devices installed at intervals, which are detachably mounted and pivotally mounted with a wire supply spool and a take-up spool,
2) Maintaining the wire wound around the wire supply spool and at least the winding spool in an electrically insulated state;
An adsorption mechanism that adsorbs the wire unwound from the wire supply spool to the take-up spool by static electricity;
3) a tension applying mechanism that applies tension to the wire running between the wire supply spool and the take-up spool in a non-contact manner; and 4) a static elimination mechanism that removes static electricity from the wire charged with static electricity. Wire winding device characterized by The wire winding device according to claim 1,
1) The wire adsorption mechanism due to static electricity is a charging mechanism that charges the take-up spool at the time of winding.
2) The static elimination mechanism that removes static electricity from the wire is a conduction mechanism that grounds both the charged wire and the take-up spool to the ground after the winding is completed.
3) A wire winding device, wherein the charging mechanism and the conduction mechanism are selectively and exclusively electrically connected to the winding spool by a common switch. The wire winding device according to claim 1 or 2,
Of wire supply spool and take-up spool,
1) At least the take-up spool is formed entirely of a conductive material, and
2) A wire winding device characterized in that at least a winding drum portion of the surface layer in contact with the wire to be wound is an extremely thin insulating layer. The wire winding device according to any one of claims 1 to 3,
A tension applying mechanism that applies a non-contact tension to a wire running between a wire supply spool and a take-up spool,
Compressed air is jetted toward a wire from a total of three directions including a pressurizing direction for applying tension to the wire and at least two directions perpendicular to the pressurizing direction, and tension is applied to the wire by air resistance. Winding device The wire winding device according to any one of claims 1 to 4,
A deflection amount detecting mechanism for detecting a deflection amount of the wire running between the wire supply spool and the take-up spool;
The wire deflection amount is controlled so that the wire deflection amount falls within a certain range by feeding back a detection signal of the wire deflection amount to a rotation supply control device that controls the rotation of the wire supply spool and the winding spool. Winding device The wire winding device according to any one of claims 1 to 5,
The wire winding device attracts the wire to the spool using electrostatic force, applies tension without contact, and uses a detection signal for the amount of deflection of the wire traveling between the spools, so that the deflection amount is within a certain range. The wire winding method is characterized in that winding is performed while controlling the rotational drive speed of the spool.

Images