JP2023160090A - wire drawing device - Google Patents

Abstract

To suppress disconnection of a wire while achieving miniaturization.SOLUTION: A wire drawing device 20 includes: a spool 25 around which a wire 21 is wound and which is rotated by a motor 23; a receiving tool 28 from which a resin base material 16 is detached; and a drawing head 27 which is vibrated by a vibrator 26. The drawing head 27 and the spool 25 are mounted on a plate 22 through the vibrator 26 and through the motor 23, respectively. The drawing head 27 is vibrated in a state that the drawing head is brought into contact with a surface of the resin base material 16 so as to adhere the wire 21 supplied from the spool 25 to the resin base material 16 while burying the wire in the resin base material. By burying and adhering the plate 22 while relatively moving the plate with respect to the receiving tool 28, the wire 21 is wired so as to draw the wire on the resin base material 16. The motor 23 rotates the spool 25 in a direction for feeding the wire 21 to the drawing head 27 at a rotation speed which does not apply a tension to the wire 21 between the spool 25 and the drawing head 27.SELECTED DRAWING: Figure 3

Description

The present invention relates to a wire drawing device that draws wires on the surface of a resin base material.

A wire drawing device shown in FIG. 4 is known as a wire drawing device that draws wires on the surface of a resin base material. This wire drawing device 60 includes a spool 62 around which a wire 61 is wound, a receiving jig 64 to which a resin base material 63 is attached/detached, and a drawing head 65 vibrated by a vibrator 66. The wire 61 supplied from the spool 62 is inserted into the drawing head 65 . The drawing head 65 adheres the wire 61 to the resin base material 63 while embedding it through the vibration. The spool 62 is rotatably supported at a separate location away from the drawing head 65.

In the wire drawing device 60 described above, the vibrator 66 is moved relative to the receiving jig 64. Due to this relative movement, the position of the drawing head 65 with respect to the resin base material 63 changes. Then, while the vibrator 66 is moved relative to the receiving jig 64, the drawing head 65 embeds and adheres the wire 61, so that the wire 61 is drawn on the surface of the resin base material 63. wired to.

Note that, as techniques related to the wire drawing device 60, for example, there are those described in Patent Documents 1 to 3.

Japanese Unexamined Patent Publication No. 4-186854 Patent No. 2833372 Patent No. 6960191

However, in the conventional wire drawing device 60, when the drawing head 65 moves away from the spool 62 due to the relative movement, the wire 61 is pulled between the spool 62 and the drawing head 65. On the other hand, when the drawing head 65 approaches the spool 62 due to the relative movement, the wire 61 becomes loose between the spool 62 and the drawing head 65. Therefore, when the drawing head 65 moves away from the spool 62, excessive tension is applied to the wire 61, which may cause the wire 61 to break. In particular, when a wire with a small diameter is used as the wire 61, the above phenomenon is likely to occur because the wire 61 has low rigidity. Therefore, with the conventional wire drawing device 60, it is difficult to draw using the wire 61 having a small wire diameter.

Furthermore, in the conventional wire drawing device 60, the spool 62 is disposed at a separate location away from the drawing head 65, which increases the size of the entire device.

A wire drawing device that solves the above problems includes: a spool around which a wire whose core portion is at least made of a conductor is rotated by a motor; a receiving jig to which a resin base material is attached/detached; a drawing head that embeds and adheres the wire supplied from the spool to the resin base material by being vibrated by a vibrator while in contact with a surface, the motor and the vibrator being common; A wire drawing device that is attached to a plate of the invention and wires the wire so as to draw the wire on the resin base material by moving the plate relative to the receiving jig, the motor drawing the wire on the resin base material. The spool is set to be rotated in a direction in which the wire is fed to the drawing head at a rotational speed that does not apply tension to the wire between the spool and the drawing head.

According to the above configuration, the wire is sent out to the drawing head by rotating the spool by the motor attached to the plate. The drawing head in contact with the surface of the resin base material is vibrated by a vibrator attached to the plate. By this vibrating drawing head, the wire sent out from the plate is embedded and adhered to the resin base material attached to the receiving jig. Further, when the plate is moved relative to the receiving jig using the motor and the vibrator, the position of the drawing head relative to the resin base material changes. Then, while the plate is moved relative to the receiving jig, the drawing head performs embedding and adhesion, thereby wiring the wire so as to be drawn on the resin base material.

Here, according to the above configuration, the drawing head is attached to the common plate via the vibrator, and the spool is attached to the common plate via the motor. Therefore, it is possible to arrange the spool closer to the drawing head and downsize the wire drawing device than when the spool is arranged at a separate location farther away from the drawing head.

Further, according to the above configuration, the drawing head, vibrator, spool, motor, and plate are integrated. As the plate moves relative to the receiving jig, the spool moves together with the drawing head. Even if the drawing head moves, the positional relationship (distance) between the drawing head and the spool does not change.

Therefore, unlike the case where the spool is rotatably supported at a location far from the drawing head and does not move, the drawing head does not move away from the spool or approach the spool. It is less likely that the tension on the wire will change between the spool and the drawing head, ie, the wire will become taut or relaxed.

Furthermore, according to the above configuration, the spool is rotated by the motor. Furthermore, the spool is rotated in a direction to feed the wire to the drawing head, and is rotated at a rotational speed that does not apply tension to the wire between the spool and the drawing head.

Therefore, when the wire is drawn by the drawing head, no tension is applied to the wire between the spool and the drawing head, or even if it is, only a small amount is applied. Therefore, a phenomenon in which the wire is disconnected between the spool and the drawing head is less likely to occur.

In the above-mentioned wire drawing device, the vibrator is configured to ultrasonic vibrate the drawing head in contact with the surface of the resin base material in a direction crossing the surface of the resin base material. Preferably, it is configured by a machine.

According to the above configuration, the drawing head in contact with the surface of the resin base material is ultrasonically vibrated by the ultrasonic vibrator in a direction crossing the surface of the resin base material, for example, in a direction perpendicular to the surface of the resin base material. . This ultrasonic vibration causes the wire to be embedded in the resin base material. The embedded wire is bonded to the resin base material by the frictional heat generated at this time.

Here, the wire can also be embedded and bonded to the resin base material by ultrasonic vibration of the drawing head in the direction along the surface of the resin base material. However, in this case, since the drawing head contacts a wide area of the surface of the resin base material, there is a risk that too much frictional heat will be generated and the resin base material will melt.

On the other hand, as in the above configuration, when the drawing head is ultrasonically vibrated in a direction that crosses the surface of the resin base material, the force that embeds the wire in the resin base material causes the wire and the resin base material to Friction occurs between them and heat is generated. Therefore, it is possible to bond the wire while embedding it in the resin base material while suppressing excessive generation of frictional heat.

In the wire drawing device described above, it is preferable that the spool used is one in which the wire having a wire diameter of 10 μm to 300 μm is wound.
When a spool wound with a wire that satisfies the above-mentioned conditions regarding the wire diameter is used, it is possible to effectively suppress the occurrence of wire breakage.

In the wire drawing device, the drawing head is vibrated by the vibrator while being in pressure contact with the surface of the resin base material, thereby bonding the wire while embedding it in the resin base material. A cushion mechanism is further provided between the plate and the drawing head, and the cushion mechanism moves the drawing head in a direction away from the receiving jig in a direction intersecting the surface. Preferably, a biasing spring is provided.

Here, the resin base material is formed by resin molding a resin material. Therefore, even if the resin base material has a flat shape (two-dimensional shape), the dimensions will vary. When the resin base material has a three-dimensional shape, the variation in dimensions becomes even larger.

In the wire drawing device described above, in which the drawing head is brought into pressurized contact with the surface of the resin base material and vibrated by a vibrator, the force with which the drawing head embeds the wire in the resin base material varies depending on the above-mentioned dimensional variations. .

In this regard, according to the above-mentioned configuration in which a cushion mechanism having a spring is provided, the spring exhibits a cushioning function. A cushion mechanism absorbs variations in the force with which the drawing head embeds the wire into the resin substrate. As a result, it becomes possible to equalize the force with which the drawing head embeds the wire into the resin base material.

In the wire drawing device, it is preferable that the plate supports a guide roller that supports the wire between the spool and the drawing head without applying tension to the wire.

According to the above configuration, the wire wound around the spool is sent out to the drawing head via the guide roller. The guide rollers only support the wire without applying tension to the wire. Therefore, the phenomenon in which the wire fed from the spool to the drawing head without tension being excessively slackened between the spool and the drawing head is suppressed.

According to the wire drawing device described above, wire breakage can be suppressed while achieving miniaturization.

FIG. 2 is a side cross-sectional view showing a millimeter-wave transmission cover to which a heater wire is wired using a wire drawing device according to an embodiment, together with a millimeter-wave radar device. FIG. 2 is a rear view of the millimeter wave transmission cover of FIG. 1. FIG. It is a schematic block diagram showing the wire drawing device in the same embodiment. FIG. 1 is a schematic configuration diagram showing a conventional wire drawing device.

An embodiment of a wire drawing device will be described below with reference to FIGS. 1 to 3.
First, a product in which wires are wired using a wire drawing device will be described.
Here, the product is a millimeter-wave transparent cover that is attached as a vehicle part to the exterior of a vehicle equipped with a millimeter-wave radar device and is transparent to millimeter waves transmitted from the millimeter-wave radar device. Let me explain using an example.

In the following description, the forward direction of the vehicle is assumed to be forward, and the backward direction is assumed to be backward. Further, the vertical direction means the vertical direction of the vehicle, and the left-right direction is the vehicle width direction, which corresponds to the left-right direction when the vehicle moves forward.

As shown by the two-dot chain line in FIG. 1, a front grill, a front bumper, etc. are attached to the front of the vehicle 10 as part of an exterior portion 11. A millimeter wave radar device 13 for forward monitoring is mounted between the exterior portion 11 and the vehicle body (not shown). The millimeter wave radar device 13 has a function of transmitting millimeter waves toward the front outside the vehicle and receiving millimeter waves that are reflected by hitting an object outside the vehicle.

In the exterior portion 11, a window portion 12 is opened at a location in front of the millimeter wave radar device 13. A millimeter wave transmitting cover 15 is disposed on the window portion 12 .
<Millimeter wave transmission cover 15>
As shown in FIGS. 1 and 2, the skeleton portion of the millimeter wave transmission cover 15 is made of a resin base material 16. The resin base material 16 has a function of decorating the vehicle 10. The resin base material 16 has a plate shape with its thickness direction being in the front-rear direction.

The resin base material 16 may be composed of a single layer having millimeter wave transparency. Further, the resin base material 16 may have a layered structure in which a plurality of layers, each having millimeter wave permeability, are laminated in the front-rear direction. In this case, the plurality of layers may include a decorative layer.

Here, when ice and snow adhere to the resin base material 16, millimeter waves are attenuated. This attenuation reduces the detection performance of the millimeter wave radar device 13 using millimeter waves. Therefore, in order to add a snow melting function to the millimeter wave transmission cover 15, heater wires 17 are wired to the resin base material 16 in a predetermined wiring pattern.

At least the core portion of the heater wire 17 is made of a conducting wire. The conducting wire is made of a metal material, such as copper, that generates heat when energized.
The heater wire 17 is wired, for example, on the rear surface of the resin base material 16. A pair of terminal portions 18 are provided on the rear surface of the resin base material 16, and the ends of the heater wires 17 are electrically connected to the corresponding terminal portions 18. Then, power from an external device (not shown) is supplied (energized) to the heater wire 17 via both terminal portions 18, and the heater wire 17 generates heat.

Note that the heater wire 17 may be wired on the front surface of the resin base material 16. Moreover, when the resin base material 16 has a layered structure, the heater wire 17 may be wired between layers adjacent in the front-rear direction.

<Wire drawing device 20>
The heater wire 17 is formed by a wire drawing device 20 shown in FIG. The wire drawing device 20 includes a plate 22 , a first moving mechanism 41 , a motor 23 , a spool 25 , a vibrator 26 , a drawing head 27 , a receiving jig 28 , and a second moving mechanism 42 . As the first moving mechanism 41 and the second moving mechanism 42, those forming part of the processing machine 40 are used.

The plate 22 is removably attached to the first moving mechanism 41 of the processing machine 40. The plate 22 is moved by the first moving mechanism 41 in the left-right direction on the page or in a direction perpendicular to the page.

Motor 23 is fixed to plate 22. The spool 25 is also called a bobbin, and is attached to the output shaft 24 of the motor 23 so as to be able to rotate integrally therewith. In other words, the spool 25 is rotatably supported by the plate 22 via the motor 23. The wire 21 is wound around the spool 25.

The wire 21 is made of the material of the heater wire 17 described above. Therefore, as the wire 21, one in which at least the core portion is made of a conducting wire such as copper is used.
Further, as the wire 21, one having a wire diameter of 10 μm to 300 μm is used. The above-described millimeter wave transmission cover 15 is required to not easily obstruct the transmission of millimeter waves to the heater wire 17 and to exhibit a snow melting function. Furthermore, in the millimeter wave transmission cover 15 used as a vehicle exterior component, if the heater wire 17 is visible, there is a risk that the appearance (design) may be deteriorated. Therefore, the heater wire 17 is required to be difficult to see and not impair the design. In order to form the heater wire 17 that satisfies these conditions, the wire 21 having a wire diameter of about 60 μm is suitable.

Note that if the heater wire 17 has a small effect on the appearance of the millimeter wave transmission cover 15, a wire 21 having a wire diameter of about 200 μm to 250 μm may be used.
The vibrator 26 is fixed to the plate 22 at a location close to the motor 23 and the spool 25. The vibrator 26 is an ultrasonic vibrator including an oscillator and an ultrasonic vibrator that converts high frequency power from the oscillator into ultrasonic vibrations. In this embodiment, an ultrasonic vibrator that vibrates the drawing head 27 at a frequency of 40 kHz or close to it is employed.

The drawing head 27 is attached to the vibrator 26. Expressed differently, the drawing head 27 is attached to the plate 22 via the vibrator 26. The drawing head 27 has a shape extending in the direction along the axis L1. The wire 21 is inserted through the tip (lower end in FIG. 3) of the drawing head 27 so as to be movable in its length direction. The drawing head 27 is brought into pressure contact with the surface of the resin base material 16 and is ultrasonically vibrated by the vibrator 26 in a direction crossing the surface of the resin base material 16, for example, in a direction perpendicular to the surface of the resin base material 16. . In this embodiment, the vibration direction of the drawing head 27 coincides with the direction along the axis L1.

The receiving jig 28 is removably attached to the second moving mechanism 42 of the processing machine 40. The receiving jig 28 is moved by the second moving mechanism 42 in a plurality of directions, for example, the left and right directions in the plane of the paper, and the direction perpendicular to the plane of the paper. The resin base material 16 is attached to and detached from the receiving jig 28 by means such as suction.

The wire drawing device 20 includes a control device 29 that controls the rotation of the motor 23. The control device 29 controls the motor 23 to rotate so as to satisfy the following conditions.
Condition 1: The spool 25 is rotated in the direction in which the wire 21 is sent out to the drawing head 27 as shown by the arrow in FIG.

Condition 2: The spool 25 should be rotated at a rotation speed that does not apply tension to the wire 21 between the spool 25 and the drawing head 27.
The wire drawing device 20 further includes a cushion mechanism 31, a guide roller 33, and a wire cutting mechanism (not shown). The cushion mechanism 31 is provided between the plate 22 and the drawing head 27. The cushion mechanism 31 has a spring 32 that urges the drawing head 27 in the direction of vibration of the ultrasonic vibration (direction intersecting the surface of the resin base material 16) away from the receiving jig 28. .

The guide roller 33 is arranged in the middle of the supply path of the wire 21 from the spool 25 to the drawing head 27, and is rotatably supported by the plate 22. The wire 21 is spanned between the spool 25 and the drawing head 27 while being in contact with the guide roller 33 . The wire 21 sent out from the spool 25 by the rotation of the motor 23 is set to be guided to the drawing head 27 while being guided by a guide roller 33. The guide roller 33 has a function of supporting the wire 21 between the spool 25 and the drawing head 27 without applying tension to the wire 21.

The wire cutting mechanism is a mechanism for wiring the wire 21 on the surface of the resin base material 16 in a predetermined wiring pattern and then cutting the wire 21 near the terminal portion 18.
Next, the operation of this embodiment configured as described above will be explained. In addition, effects that occur as a result of the action will also be explained.

<(1) Regarding formation of heater wire 17 using wire drawing device 20>
(1-1) When forming the heater wire 17 on the resin base material 16, the wire 21 wound around the spool 25 is supplied to the drawing head 27. More specifically, the spool 25 is rotated by the motor 23 in a direction in which the wire 21 wound around the spool 25 is sent out to the drawing head 27.

On the other hand, the drawing head 27 is brought into pressure contact with the surface of the resin base material 16 and is vibrated by the vibrator 26 in a direction (vertical direction) intersecting the surface. Then, the wire 21 sent out from the spool 25 is bonded to the resin base material 16 attached to the receiving jig 28 while being embedded therein.

In particular, in this embodiment, the drawing head 27 is vibrated (ultrasonic vibration) at a frequency of 40 kHz or close to it by a vibrator 26 consisting of an ultrasonic vibrator. The wire 21 is embedded in the resin base material 16 by this ultrasonic vibration. The embedded wire 21 can be bonded to the resin base material 16 by the frictional heat generated at this time.

(1-2) Here, it is also possible to embed the wire 21 in the resin base material 16 and bond it by ultrasonically vibrating the drawing head 27 in the direction (lateral direction) along the surface of the resin base material 16. It is. However, in this case, since the drawing head 27 contacts a wide area of the surface of the resin base material 16, there is a risk that too much frictional heat will be generated and the resin base material 16 will melt.

In contrast, in this embodiment, as described above, the drawing head 27 is ultrasonically vibrated in a direction (vertical direction) intersecting the surface of the resin base material 16. The force of embedding the wire 21 in the resin base material 16 causes friction between the wire 21 and the resin base material 16, and heat is generated. Therefore, in this embodiment, the wire 21 can be bonded to the resin base material 16 while being embedded in the resin base material 16 while suppressing excessive generation of frictional heat.

(1-3) In the wire drawing device 20, the receiving jig 28 is moved by the second moving mechanism 42, and the plate 22 is moved by the first moving mechanism 41, for example, in the left-right direction of the page or in the direction orthogonal to the page. be moved to. These movements cause the plate 22 to move relative to the receiving jig 28.

With the above relative movement, the position of the drawing head 27 with respect to the resin base material 16 changes. Then, while the plate 22 is moved relative to the receiving jig 28, the above-mentioned embedding and adhesion are performed by the drawing head 27, so that the wire 21 is wired so as to be drawn on the resin base material 16.

(1-4) Here, the resin base material 16 is formed by resin molding a resin material. Therefore, even if the resin base material 16 has a flat shape (two-dimensional shape) like a printed wiring board, the dimensions will vary. When the resin base material 16 has a three-dimensional shape, the variation in dimensions becomes even larger.

In the wire drawing device 20 in which the drawing head 27 is vibrated by the vibrator 26 while being in pressurized contact with the surface of the resin base material 16, the drawing head 27 moves the wire 21 to the resin base according to the above-mentioned dimensional variations. The force of embedding it into the material 16 varies.

In this regard, in this embodiment, a cushion mechanism 31 having a spring 32 is provided. In the cushion mechanism 31, the spring 32 exhibits a cushioning function. Variations in the force with which the drawing head 27 embeds the wire 21 into the resin base material 16 are absorbed by the cushion mechanism 31. Therefore, the force with which the drawing head 27 embeds the wire 21 into the resin base material 16 can be made uniform.

<(2) Regarding miniaturization of the wire drawing device 20>
(2-1) In this embodiment, the drawing head 27 is attached to the common plate 22 via the vibrator 26, and the spool 25 is attached via the motor 23.

Therefore, compared to the conventional wire drawing device 60 in which the spool 62 is placed at a separate location away from the drawing head 65, the spool 25 can be placed close to the drawing head 27, and the wire drawing device 20 can be made smaller. Can be done.

<(3) Regarding suppression of disconnection of wire 21>
(3-1) In this embodiment, the drawing head 27, vibrator 26, spool 25, motor 23, and plate 22 are integrated. As the plate 22 moves relative to the receiving jig 28, the spool 25 moves together with the drawing head 27. Even if the drawing head 27 moves, the positional relationship (distance) between the drawing head 27 and the spool 25 does not change.

Therefore, unlike the conventional wire drawing device 60 in which the spool 62 is rotatably supported at a location away from the drawing head 65 and does not move, the drawing head 27 does not move away from the spool 25 or approach the spool 25. There is no. Between the spool 25 and the drawing head 27, the tension applied to the wire 21 is unlikely to change, that is, the wire 21 is unlikely to become taut or loose.

Furthermore, in this embodiment, the spool 25 is rotated by the motor 23. Furthermore, the spool 25 is rotated in a direction to feed the wire 21 to the drawing head 27, and is rotated at a speed that does not apply tension to the wire 21 between the spool 25 and the drawing head 27.

Therefore, in this embodiment, no tension is applied to the wire 21 between the spool 25 and the drawing head 27, or even if it is applied, the tension is only small. Therefore, it is possible to prevent the wire 21 from breaking between the spool 25 and the drawing head 27.

(3-2) When the wire drawing device 20 was used to draw the wire 21 on the resin base material 16, if the wire 21 had a wire diameter of 10 μm to 300 μm, the wire would not break. It was confirmed that the wire 21 could be bonded while being embedded in the resin base material 16.

In this regard, in the present embodiment, the spool 25 is a wire around which a wire 21 having a wire diameter of about 60 μm is wound. Therefore, it becomes possible to effectively suppress wire breakage.

<(4) Regarding the operation of the motor 23>
(4-1) In the conventional wire drawing device 60 shown in FIG. 4, by adding a motor that rotates the spool 62, it is possible to suppress wire breakage. However, when the drawing head 65 moves away from the spool 62 due to the relative movement of the vibrator 66 with respect to the receiving jig 64, it is necessary to rotate the spool 62 in the direction in which the wire 61 is sent out. On the other hand, when the drawing head 65 approaches the spool 62 due to the above-mentioned relative movement, it is necessary to rotate the spool 62 in the opposite direction. Furthermore, it is necessary to control the rotational speed of the motor so that the tension applied to the wire 61 between the spool 62 and the drawing head 65 is constant regardless of the moving direction of the drawing head 65. Therefore, controlling the rotation of the motor becomes complicated, and the cost of the wire drawing device 60 increases.

In this regard, in this embodiment, as described above, the motor 23 rotates the spool 21 in the direction of feeding the wire 21 to the drawing head 27, and rotates the spool 21 at a rotation speed that does not apply tension to the wire 21 between the spool 25 and the drawing head 27. It's just rotating. Therefore, the motor 23 can be easily controlled, and the cost of the wire drawing device 20 can be reduced.

<(5) Actions and effects other than the above>
(5-1) In this embodiment, the wire 21 wound around the spool 25 is sent out to the drawing head 27 via the guide roller 33. The guide roller 33 only supports the wire 21 without applying tension to the wire 21. Therefore, the wire 21 that is sent out from the spool 25 to the drawing head 27 in a state where no tension is applied can be prevented from becoming excessively slack between the spool 25 and the drawing head 27.

(5-2) In this embodiment, as described above, the spool 25 is attached to the plate 22 common to the drawing head 27, and moves together with the plate 22. Therefore, the size of the spool 25 that can be used is more limited than in the conventional wire drawing device 60 in which the spool 62 and the drawing head 65 are arranged at different locations. In other words, the maximum diameter of the spool 25 that can be used in this embodiment is smaller than the maximum diameter of the spool 62 that can be used in the conventional wire drawing device 60. As the diameter of the spools 25, 62 becomes smaller, the length of the wires 21, 61 wound around the spools 25, 62 becomes shorter.

A spool 62 with a large diameter is suitable for producing large quantities of the same type of product. In this case, drawing (wiring) is repeatedly performed on the same type of resin base material 63 using the same type of wire 61.

On the other hand, the spool 25 having a small diameter is suitable for producing a plurality of types of products in small quantities, that is, producing a wide variety of products in small quantities. In this case, drawing (wiring) is performed using a plurality of types of wires 21 on a plurality of types of resin base materials 16.

When manufacturing multiple types of products using the same wire drawing device, it is necessary to change settings from manufacturing a given product to settings for manufacturing another product, ie, a so-called stage change. A stage change is necessary every time the type of product is changed. In the case of high-mix, low-volume production as described above, stage changes are often performed.

Therefore, the wire drawing device 20 of this embodiment, in which the spool 25 with a small diameter is attached and detached, is suitable for the case where many stage changes are performed as described above.
(5-3) The wire drawing device 20 of this embodiment is used by being attached to the processing machine 40. If a large diameter spool 25 is used, a large processing machine 40 is required to withstand the load of the spool 25.

In this regard, in this embodiment, as explained in (5-2) above, a spool 25 with a small diameter is used. Therefore, compared to the case where the spool 25 with a large diameter is used, a smaller processing machine 40 can be used.

(5-4) As the frequency band used by the vibrator 26 for ultrasonic vibration becomes lower, the energy given to the resin base material 16 from the drawing head 27 increases. When the drawing head 27 is ultrasonically vibrated in a frequency band around 40 kHz, the amplitude can be set larger than when the drawing head 27 is ultrasonically vibrated in a frequency band around 70 kHz, and more energy is transferred to the resin base material 16. It is possible to give Expressed differently, it is easier to control the amount of energy given to the resin base material 16 if the drawing head 27 is ultrasonically vibrated in a frequency band of around 40 kHz rather than in a frequency band of around 70 kHz.

In general, bare wires, that is, conductive wires that are not covered with an insulator or protective material, are difficult to embed and adhere to a resin material (resin base material) by ultrasonic vibration.
However, in this embodiment in which the drawing head 27 is ultrasonically vibrated in a frequency band of around 40 kHz, even a bare wire as described above can be embedded in the resin base material 16 and bonded.

(5-5) As explained in (5-4) above, it is possible to embed the bare wire in the resin base material 16 and bond it. Therefore, in this embodiment, any type of wire 21 covered with an insulating material or a protective material can be embedded and bonded to the resin base material 16 regardless of the type.

For example, an enamelled wire in which a conducting wire is coated with an enamel film falls under this category. Furthermore, even a so-called self-bonding wire in which a conducting wire is covered with an insulating layer and the insulating layer is further covered with a fusing layer can be embedded in the resin base material 16 and bonded. In particular, when a self-fusing wire is used as the wire 21, the wire 21 can be bonded to the resin base material 16 while the fusing layer is melted by frictional heat.

Note that the above embodiment can also be implemented as a modified example in which the above embodiment is modified as follows. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

<Resin base material 16>
- The resin material forming the resin base material 16 is not particularly limited. The resin material may be a general-purpose plastic such as PP (polypropylene) resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, or PET (polyethylene terephthalate) resin. Further, the resin material may be an engineering plastic such as PC (polycarbonate) resin.

- The resin base material 16 may have a sheet shape (two-dimensional shape) or a three-dimensional shape (three-dimensional shape).
<About the wire 21>
- Among vehicle parts formed by wiring the wire 21, for those in which the wire 21 (heater wire 17) has a small influence on the appearance, the wire 21 having a wire diameter of about 300 μm is used. Good too. Applicable vehicle parts include, for example, an armrest with a heater, a steering wheel with a heater, and the like.

<About relative movement of plate 22>
- Relative movement of the plate 22 with respect to the receiving jig 28 may be performed only by moving the plate 22 with the first moving mechanism 41.

<About the vibrator 26>
- As the vibrator 26, a type of vibrator different from the ultrasonic vibrator is used, provided that the wire 21 can be bonded while being embedded in the resin base material 16 by vibrating the drawing head 27. Good too.

- The drawing head 27 may be ultrasonically vibrated in the direction (lateral direction) along the surface of the resin base material 16 by the vibrator 26.
<About the guide roller 33>
- The number and size of the guide rollers 33 may be changed as appropriate. Further, the guide roller 33 may be rotatably supported by the plate 22 or may be non-rotatably supported.

<About the product in which the wire 21 is wired by the wire drawing device 20>
- The above-mentioned wire drawing device 20 can be applied to the above-mentioned millimeter wave transmission cover, armrest with a heater, steering wheel with a heater, if it is a product in which a resin base material 16 and wires 21 are wired on the surface of the resin base material 16. However, it is widely applicable.

Examples of the above-mentioned products include emblems that are transparent to millimeter waves. The above-mentioned products also include near-infrared transmitting covers and emblems that are attached to the exterior of a vehicle equipped with a near-infrared sensor and are transparent to near-infrared rays transmitted from the near-infrared sensor. Further, the above-mentioned products include covers for millimeter wave radar devices and covers for near-infrared sensors.

16... Resin base material 20... Wire drawing device 21... Wire 22... Plate 23... Motor 25... Spool 26... Vibrator 27... Drawing head 28... Receiving jig 31... Cushion mechanism 32... Spring 33... Guide roller

Claims (5)

a spool around which a wire having at least a core portion made of a conductor is wound and rotated by a motor;
a receiving jig for attaching and detaching the resin base material;
a drawing head that embeds and adheres the wire supplied from the spool in the resin base material by being vibrated by a vibrator while in contact with the surface of the resin base material, the motor and the vibrators are mounted on a common plate;
A wire drawing device that wires the wire so as to draw the wire on the resin base material by moving the plate relative to the receiving jig,
The wire drawing device, wherein the motor is set to rotate the spool in a direction in which the wire is sent to the drawing head at a rotational speed that does not apply tension to the wire between the spool and the drawing head. The vibrator is configured by an ultrasonic vibrator that causes the drawing head, which is in contact with the surface of the resin base material, to ultrasonically vibrate in a direction intersecting the surface of the resin base material. The wire drawing device according to claim 1. The wire drawing device according to claim 2, wherein the spool is a spool in which the wire having a wire diameter of 10 μm to 300 μm is wound. The drawing head is in pressure contact with the surface of the resin base material and is vibrated by the vibrator to bond the wire while embedding it in the resin base material,
A cushion mechanism is further provided between the plate and the drawing head,
4. The wire drawing device according to claim 3, wherein the cushion mechanism includes a spring that urges the drawing head in a direction away from the receiving jig in a direction intersecting the surface. 5. The wire drawing device according to claim 3, wherein the plate supports a guide roller that supports the wire between the spool and the drawing head without applying tension to the wire.

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