JP2002334619A - Manufacturing method of flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase lamination speed of a flat cable. SOLUTION: In laminating a conductor 1 with heat rollers 7a, 7b by pinching it with insulation films 2a, 2b, it is heated rapidly and well with heaters 12a to 12d and sub heat rollers 11a, 11b before the insulation films 2a, 2b reach the heat rollers 7a, 7b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of supplying a plurality of linear conductors in parallel between a pair of heat rollers,
The present invention relates to a flat cable manufacturing apparatus in which a pair of insulating films supplied from a supply roller are heated by a heat roller to melt an adhesive layer and sandwich a conductor between the insulating films.

[0002]

2. Description of the Related Art For the purpose of space saving and weight saving, as shown in FIG. 13, a flat rectangular conductor 1 or a round conductor is arranged on a plane and sandwiched between two insulating films 2a and 2b as insulating materials. There is a cable. In this case, the insulating film 2
As a and 2b, a polyester-based material such as PET having good insulating properties is formed as a main component.

In order to bond the insulating films 2a and 2b together, as shown in FIG.
Adhesive layers 3a and 3b (reference numeral 3 in FIG. 13) are previously formed on one surface of each of a and 2b, and these are paired from supply rollers 5a and 5b via guides 6a and 6b as shown in FIG. Is supplied at a speed of about 4 to 5 m / min between the heat rollers 7a and 7b, and is heated by the heat rollers 7a and 7b to melt the adhesive layers 3a and 3b. Is generally used.

[0004] Here, for example, JP-T-2000-50283
In the flat cable disclosed in No. 3, the bases are partially welded continuously along the conductor at fixed intervals.

[0005]

SUMMARY OF THE INVENTION First Problem In melting the adhesive layers 3a and 3b, generally, the molten adhesive layer 3
In order to prevent a and 3b from adhering to the heat rollers 7a and 7b, the surfaces of the insulating films 2a and 2b on which the adhesive layers 3a and 3b are not formed are heated. For this reason, when the adhesive layers 3a and 3b having a high melting point are melted, the surfaces of the insulating films 2a and 2b are subjected to high-temperature thermal stress, and the insulating films 2a and 2b themselves may be contracted.

Also, as the thickness of the insulating film increases,
Heat is hardly transmitted to the adhesive layers 3a and 3b, and the time required for laminating is large and the efficiency is low.

An object of the present invention is to provide a flat cable manufacturing apparatus which can easily laminate even if the insulating film is thick, and can improve the adhesiveness while shortening the laminating time.

{Second Problem} Also, the insulating films 2a,
When the thickness of 2b is large, or when the thickness of the conductor 1 or the like is large, the film may be wavy after lamination as shown in FIG.

It is an object of the present invention to provide a flat cable manufacturing apparatus capable of preventing occurrence of waving.

{Third Problem} For example, JP-T-2000-50
In the flat cable disclosed in No. 2833, it is difficult to position the conductor 1 and the like with respect to the insulating films 2a and 2b, and therefore it is difficult to strictly control the juxtaposed pitch of the conductors 1 in the flat cable. Was. In particular, when ultrasonic vibrations occur, the juxtaposed pitch of the conductors 1 tends to shift, so that adjusting the juxtaposed pitch of the conductors 1 has been a problem. In particular, since the round conductor has a shape that easily rolls in the width direction of the flat cable, there is a problem that a slight pitch shift is likely to occur at the moment when the conductor is pressed and laminated by the heat rollers 7a and 7b.

Further, since the conductor 1 has a certain thickness,
When the conductor 1 is sandwiched between the insulating films 2a, 2b from both sides, a gap is often generated between the conductor 1 and the insulating films 2a, 2b. When the size of the gap is large, there is a problem that the waterproof property is impaired. In addition, since a gap is generated between the insulating films 2a and 2b and the conductor 1, there is a possibility that adjacent conductors 1 may come into contact with each other, and a short circuit may occur between the plurality of conductors 1.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flat cable manufacturing apparatus capable of adjusting the pitch of conductors, ensuring waterproofness, and preventing a short circuit between conductors.

[0013]

Means for Solving the Problems In order to solve the above problems,
The invention according to claim 1 is a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel, and a pair of the supply rollers supplied from the supply roller. A pair of heat rollers for sandwiching and bonding the conductor with the insulating film while heating the insulating film to melt the adhesive layer, and between a position where the conductor is sandwiched between the insulating films by the heat roller and the supply roller; And a heater for blowing hot air onto the surface of the insulating film on which the adhesive layer is formed.

According to a second aspect of the present invention, there is provided the flat cable manufacturing apparatus according to the first aspect, wherein the insulating film is provided between the blowing position of the heater and the supply roller. And a sub-heat roller for pre-heating the insulating film while guiding the insulating film.

According to a third aspect of the present invention, a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel.
A pair of heat rollers, which heats the pair of insulating films supplied from the supply roller and melts the adhesive layer while sandwiching and bonding the conductor with the insulating film, and a flat cable discharged from the heat roller. A take-up roller for taking the flat cable, wherein a speed at which the flat cable is taken out by the take-up roller is set to be higher than a speed at which the flat cable is discharged from the heat roller.

According to a fourth aspect of the present invention, there is provided the flat cable manufacturing apparatus according to the third aspect, wherein the rotational driving torque of the take-up roller is set to be larger than the rotational driving torque of the heat roller. .

According to a fifth aspect of the present invention, there is provided the flat cable manufacturing apparatus according to any one of the third and fourth aspects, wherein one of the pair of heat rollers has a predetermined rotation axis. And the other heat roller is rotatably supported by the drive source, the other heat roller is rotatably supported, the one heat roller is made of metal, and the other heat roller is made of rubber.

According to a sixth aspect of the present invention, a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel.
A pair of heat rollers, which heat the pair of insulating films supplied from the supply roller and sandwich the conductor with the insulating film while adhering to the adhesive layer and bond the conductors, the outer peripheral surface is formed smoothly, and A smooth roller disposed near the heat roller to discharge the flat cable,
A forming guide roller formed to correspond to the shape of the flat cable having a thickness changed depending on the presence or absence of a conductor, for guiding the flat cable discharged from the heat roller together with the smooth surface roller and guiding the flat cable, A small diameter portion formed corresponding to the thickness of the portion of the flat cable where the conductor is disposed, and a large diameter portion formed corresponding to the thickness of the portion of the flat cable where the conductor is not disposed. It is provided.

According to a seventh aspect of the present invention, a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel.
A pair of heat rollers that heat the pair of insulating films supplied from the supply roller and melt the adhesive layer while sandwiching and bonding the conductor with the insulating film; One is an elastic roller.

According to the present invention, a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, a plurality of round conductors being received in a parallel state, and a pair of supply rollers supplied from the supply roller. A pair of heat rollers that heat the insulating film to melt the adhesive layer and sandwich and adhere the round conductor with the insulating film, and guide the round conductor to the surface of the heat roller to shift the position. In which a positioning groove is formed to prevent the occurrence of pits.

According to a ninth aspect of the present invention, there are provided a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, a pair of rolling rollers for crushing and discharging a plurality of parallel round conductors, While receiving the round conductor discharged after being crushed by the roller in a parallel state, the pair of the insulating films supplied from the supply roller are heated to melt the adhesive layer, and the round conductor is melted by the insulating film. And a pair of heat rollers for sandwiching and bonding.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a view showing a flat cable manufacturing apparatus according to a first embodiment of the present invention. In FIG. 1, elements having the same functions as those of the conventional example shown in FIG. 15 are denoted by the same reference numerals.

This flat cable manufacturing apparatus solves the above-mentioned first problem. As shown in FIG. 1, a preheating device is further provided between heat rollers 7a and 7b for lamination and guides 6a and 6b. Sub heat rollers 11a and 11b for processing
And the auxiliary heat roller 1 for this pre-heating treatment.
Adhesive layers 3a, 3 of insulating films 2a, 2b supplied from la and 11b to laminating heat rollers 7a, 7b
heaters 12a to 12d for warming the surface to which b is attached
Is installed.

The installation positions of the sub heat rollers 11a and 11b are as follows.
The heat rollers 7a and 7b for lamination are disposed substantially above and substantially below in FIG. 1, respectively.
Guides 6a, 6b in oblique directions of the heat rollers 7a, 7b
The contact area of the insulating films 2a, 2b with the heat rollers 7a, 7b is made larger than that of the conventional example in which the insulating films 2a, 2b are supplied from the above. For example, in the conventional example shown in FIG.
b is in contact with the heat rollers 7a and 7b.
Although it was about 30 degrees (θ0) in the circumferential direction of a and 7b,
In the present embodiment shown in FIG. 1, the angle is increased to a range of about 60 degrees (θ1). Thereby, the insulating films 2a, 2b
The heating effect is increasing.

The heaters 12a to 12d are hot air jets called hot jets for jetting hot air from air nozzles using a predetermined air pump.
Hot air at about 400 ° C. is directly blown onto the surfaces of the insulating films 2a, 2b to which the adhesive layers 3a, 3b are applied, which are stretched between the heat rollers 7a, 11b and the heat rollers 7a, 7b.

The other structure is the same as that of the conventional example shown in FIG.

In the flat cable manufacturing apparatus having the above configuration, for example, the insulating films 2a and 2
An operation example in which both surfaces of the conductor 1 are sandwiched in a state where the adhesive layers 3a and 3b each having a thickness of 50 μm are formed on one surface of “b” (total thickness of 150 μm) will be described.

First, the insulating films 2a, 2b having the adhesive layers 3a, 3b formed on one surface are unwound from a pair of supply rollers 5a, 5b arranged in the vertical direction in FIG. The insulating films 2a and 2b are used as guides 6a and 6b
And is heated by the sub heat rollers 11a and 11b. The insulating films 2a and 2b are used as auxiliary heat rollers 11a,
When being sent out from the heat roller 11b to the heat rollers 7a and 7b for lamination, it is heated by the heaters 12a to 12d on the way. At this time, the heaters 12a to 12d are provided on the surfaces of the insulating films 2a and 2b on which the adhesive layers 3a and 3b are applied.
Hot air of about 400 ° C. is directly blown. Therefore, the adhesive layers 3a and 3b are surely melted before reaching the laminating heat rollers 7a and 7b.

The laminating heat rollers 7a, 7
b, the conductor 1 is supplied and sandwiched between the insulating films 2a and 2b from above and below.

At this time, the adhesive layers 3a, 3a attached to the insulating films 2a, 2b are heated by the heat rollers 7a, 7b.
3b maintains a molten state, and at the same time, heat rollers 7a,
7b are applied to both sides of the conductor 1 by an insulating film 2
a, 2b, and laminate (temporary adhesion).

In particular, as compared with the conventional example shown in FIG. 15, the contact range of the insulating films 2a, 2b with the heat rollers 7a, 7b is increased to a range of 60 degrees in the circumferential direction of the heat rollers 7a, 7b. Therefore, the effect of heating the insulating films 2a and 2b by the heat rollers 7a and 7b is improved.
Adhesive layers 3a, 3b adhered to insulating films 2a, 2b
Is reliably maintained.

Thereafter, ultrasonic waves are oscillated by a predetermined ultrasonic welding machine on the laminated (temporarily bonded) flat cable to further strengthen the portion between adjacent conductors (non-conductor portion). And a flat cable is completed.

As described above, before the insulating films 2a and 2b reach the laminating heat rollers 7a and 7b, they are sufficiently heated by the sub-heat rollers 11a and 11b and the heaters 12a to 12d. The speed can be increased from about 4 to 5 m / min of the conventional example to about 8 to 10 m / min. Therefore, production efficiency can be improved.

The adhesive layer 3 of the insulating films 2a, 2b
Since the surfaces to which a and 3b are applied can be directly heated, the thermal stress directly applied to the insulating films 2a and 2b can be reduced. Therefore, the insulating film 2
It is possible to prevent the occurrence of heat shrinkage of a and 2b, improve the adhesiveness, and easily manufacture a flat cable without inferior performance and quality.

Further, even when the thickness of the insulating films 2a and 2b is large, the adhesive layers 3a and 3b can be directly heated by the heaters 12a to 12d. Further, even when the adhesive layers 3a and 3b are formed using a material having a high melting point, the production can be performed without any problem.

[Second Embodiment] FIG. 2 is a view showing a flat cable manufacturing apparatus according to a second embodiment of the present invention. In FIG. 2, elements having the same functions as those in the first embodiment and the conventional example are denoted by the same reference numerals.

As shown in FIG. 2, the flat cable manufacturing apparatus according to this embodiment solves the second problem described above, and sandwiches the flat cable 15 discharged from the laminating heat rollers 7a and 7b. The take-up rollers 17a and 17b for taking over by means of are provided.

The speed at which the take-off rollers 17a, 17b take off the flat cable 15 is determined by the heat rollers 7a, 7b.
Is set slightly faster than the speed at which the flat cable 15 is discharged from the flat cable 15, and the pull-in force of the take-off rollers 17a, 17b to the flat cable 15 is set to be larger than the force with which the heat rollers 7a, 7b pinch the flat cable 15. .

More specifically, the rotational speeds of the heat rollers 7a and 7b and the take-up rollers 17a and 17b are made equal,
The diameters of 7a and 17b are changed to heat rollers 7a and 7 for lamination.
It is set to be about 1.1 to 1.5 times as large as the diameter of b.

The pressing force when sandwiching the flat cable 15 between the take-off rollers 17a and 17b is set higher than the pressing force when sandwiching the heat rollers 7a and 7b.

Further, the rotational drive torque of the take-off rollers 17a, 17b is set higher than the rotational drive torque of the laminating heat rollers 7a, 7b.

On the other hand, heat rollers 7a and 7b for laminating
The drive shaft 19b of one of the heat rollers (lower heat roller) 7b is rotationally controlled by a drive source such as a rotary motor (not shown). Further, the center shaft 19a of the other heat roller (for example, the upper heat roller 7a) is rotatably supported by a predetermined bearing, and is in a state where it is not subjected to the above-described rotation drive control of the drive source. Then, in a state where the peripheral surfaces of the heat rollers 7a and 7b are in contact with each other while being pressed against each other, the other heat roller (7a) is passively rotated with the rotation of one heat roller (7b). ing.

The heat roller 7b on the side that is rotationally controlled by the drive source is formed of metal, and the heat roller 7a on the side that is not controlled by the drive source is formed of rubber having good grip. .

In the flat cable manufacturing apparatus having the above structure, for example, the insulating films 2a and 2
An operation example in which both surfaces of the flat conductor 1 having a thickness of about 0.8 mm are sandwiched in a state in which the adhesive layers 3a and 3b of 100 μm are formed on one side of (b) (total thickness of 300 μm).

First, the insulating films 2a, 2b having the adhesive layers 3a, 3b formed on one surface are unwound from a pair of supply rollers 5a, 5b arranged vertically in FIG. The insulating films 2a and 2b are used as guides 6a and 6b
Is supplied to the heat rollers 7a and 7b for lamination.

The laminating heat rollers 7a, 7
b, the conductor 1 is supplied and sandwiched between the insulating films 2a and 2b from above and below. At this time, the insulating films 2a, 2b are heated by the heat rollers 7a, 7b.
The adhesive layers 3a and 3b attached to the conductor 1 are melted, and at the same time, both surfaces of the conductor 1 are sandwiched between the insulating films 2a and 2b by the pressing force of the heat rollers 7a and 7b for lamination.

Incidentally, in the heat rollers 7a and 7b,
When the conductor 1 is sandwiched between the two insulating films 2a and 2b and laminated, the flat cable 15 is taken up by the take-off rollers 17a and 17b, and then, with respect to the flat cable that has been laminated (temporarily bonded), Ultrasonic waves are oscillated by a predetermined ultrasonic welding machine, and the portion between the adjacent conductors (non-conductor portion) is further firmly welded to complete a flat cable.

Here, as described above, the take-off roller 17
The diameter of the heat rollers 7a and 7b is set larger than the diameter of the heat rollers 7a and 7b for lamination, and the pressing force when the flat cable 15 is sandwiched between the take-off rollers 17a and 17b is the pressing force when the heat rollers 7a and 7b are sandwiched. While setting higher, the rotational drive torque of the take-off rollers 17a, 17b is set higher than the rotational drive torque of the heat rollers 7a, 7b for lamination, and the heat roller 7b, which is rotationally controlled by the drive source, is controlled. Because it is made of metal,
When the flat cable 15 laminated by the heat rollers 7a, 7b is taken by the take-off rollers 17a, 17b, a slight slip can be generated on the heat rollers 7a, 7b side, and the flat cable 15 by the take-off rollers 17a, 17b 15, the take-up speed of the heat roller 7a,
7b is faster than the discharge speed of the flat cable 1b.
5 and the conductor 1 can be tensioned. Therefore, as shown in FIG. 3, undulations (FIG. 16) of the flat cable 15 can be suppressed regardless of the thickness of the conductor 1.

Third Embodiment FIGS. 4 and 5 show a flat cable manufacturing apparatus according to a third embodiment of the present invention. In FIGS. 4 and 5, elements having the same functions as those of the first embodiment, the second embodiment, and the conventional example are denoted by the same reference numerals.

The insulating film 2 is heated by the heat rollers 7a and 7b.
When the conductor 1 is sandwiched between a and 2b, the thickness of the flat cable 15 is different between a portion 21 having the conductor 1 (hereinafter referred to as a "conducting portion") and a portion 21 having no conductor (non-conductor portion). In consideration of this, in this embodiment, the heat roller 7a, 7b is used to connect the conductor 1 between the insulating films 2a, 2b.
As shown in FIGS. 4 and 5, a forming guide roller 23 formed in a shape in consideration of a change in the thickness of the conductive portion 21 and the non-conductive portion 22 is provided as a guide roller to be used in the process after the sandwiching. By forming the flat cable 15 on one side thereof with unevenness by the forming guide roller 23 and laminating the same, the displacement of the conductor 1 can be prevented, and the insulating film 2a on both sides of the non-conductive portion 22 can be prevented.
2b are securely bonded to each other to ensure waterproofness.

Specifically, the forming guide roller 23
As shown in FIG. 5, a small diameter portion 25 formed corresponding to the thickness of the conductive portion 21 of the flat cable 15 and a thickness of the non-conductive portion 22 of the flat cable 15 are formed as shown in FIG. The correspondingly formed large diameter portion 24
Are formed continuously in the direction of the rotation axis corresponding to the positions where the portions 21 and 22 are formed. The large diameter portion 24 of the forming guide roller 23 and the smooth surface roller 26 press the non-conductive portion 22 of the flat cable 15 from both sides. As a result, the insulating films 2a and 2b on both sides of the non-conductive portion 22 are closely adhered to each other (temporary adhesion)
Is done. Thereafter, an ultrasonic wave is oscillated with a predetermined ultrasonic welding machine on the laminated (temporarily bonded) flat cable, and the non-conductive portion 22 is further firmly welded to complete the flat cable.

Here, the large diameter portion 2 of the forming guide roller 23
The boundary 27 between the 4 and the small diameter portion 25 is tapered so that when the conductor 1 is misaligned in the width direction inside the flat cable 15, the conductor 1 can be guided to an appropriate position. Is formed. Thereby, the displacement of the conductor 1 in the flat cable 15 can be prevented.

When the boundary portion 27 is formed in a tapered shape as described above, a portion 28 in which each of the insulating films 2a and 2b of the flat cable 15 is formed in a tapered shape is generated corresponding to the tapered shape. As a result, a gap 2 having a triangular cross section is provided between the insulating films 2a and 2b and the conductor 1.
9 occurs. However, the insulating films 2a,
Since adhesive layers 3a and 3b are formed on one surface of 2b, the adhesive layers 3a and 3b are melted to fill the gap 29, so that waterproofness in the flat cable 15 can be secured, and adjacent conductors can be secured. 1 and the conductor 1 can be prevented from coming off in the longitudinal direction.

Fourth Embodiment FIGS. 6 and 7 show a flat cable manufacturing apparatus according to a fourth embodiment of the present invention. In FIGS. 6 and 7, elements having the same functions as those of the conventional example and the first to third embodiments are denoted by the same reference numerals. As described in the third embodiment, the flat cable manufacturing apparatus according to this embodiment includes a conductive portion 21 and a non-conductive portion 22 when the conductor 1 is sandwiched between the insulating films 2a and 2b by the heat rollers 31 and 32. And the thickness of the flat cable 15 is different. Considering this, in this embodiment, as shown in FIGS. 6 and 7, a pair of heat rollers 31 and 32 are used.
One of the elastic rollers 31 is configured as a rubber elastic roller, and the other 32 is configured as a metal roller. When the flat cable 15 is sandwiched between the elastic roller 31 and the metal roller 32 for lamination processing, the elastic roller 31 is used. Can be deformed according to the shape of the flat cable 15. Thereby, the insulating films 2a and 2b on both sides are securely adhered to each other in the non-conductive portion 22 to ensure waterproofness.

Here, the metal roller 32 is connected to a heater (not shown), and the insulating film 2a, 2b is heated by the metal roller 32 to melt the adhesive layers 3a, 3b. On the other hand, the elastic roller 31 is not heated.

In such a configuration, as shown in FIG. 7, a part 33 of the elastic roller 31 is deformed according to the thickness of the conductive part 21 protruding from one side of the flat cable 15. At this time, the undeformed portion 34 of the elastic roller 31 and the metal roller 32 are connected to the flat cable 15.
The non-conductive portions 22 are pressed against each other from both sides, so that the insulating films 2a and 2b
The pieces are adhered to each other. Therefore, similarly to the third embodiment, waterproofness in the flat cable 15 can be ensured, and a short circuit between the adjacent conductors 1 and the conductors 1 can be prevented from coming off in the longitudinal direction.

Fifth Embodiment FIG. 8 is a cross-sectional view showing a flat cable formed by sandwiching a round conductor with an insulating film, and FIG. 9 shows a flat cable manufacturing apparatus according to a fifth embodiment of the present invention. FIG. 10 is a side view showing the heat roller. In FIGS. 9 and 10, elements having the same functions as those in the first to fourth embodiments are denoted by the same reference numerals.

Generally, as shown in FIG. 8, when a plurality of round conductors 41 are sandwiched between insulating films 42a and 42b from both sides and laminated to produce a flat cable 43, a predetermined pitch guide (not shown) is used. Te round conductor 4
Even if the arrangement pitch between the two is adjusted, the arrangement pitch is likely to slightly shift at the moment when pressure is applied by the heat roller due to the rolling.

In the flat cable 43, the thickness of the portion (conductor portion) where the round conductor 41 is disposed is
It becomes larger than the thickness of the portion where no 1 is disposed (non-conductor portion). Therefore, when lamination is performed with a flat-shaped heat roller, the insulating films on both sides may not completely adhere to each other in the non-conductive portion, and the waterproofness may be poor, and the round conductors 41 may come into contact with each other to cause a short circuit. .

Therefore, in this embodiment, a positioning groove 45 corresponding to the arrangement pitch of the round conductors 41 is formed on the surfaces of the heat rollers 44a and 44b, thereby ensuring that the arrangement pitch of the round conductors 41 is as designed. And the insulating films 42a and 42b in the non-conductive portions can be securely pressed down and adhered to the surfaces of the heat rollers 44a and 44b.

Sixth Embodiment FIG. 11 is a side view showing a flat cable manufacturing apparatus according to a sixth embodiment of the present invention, and FIG. In FIG. 11, the same reference numerals are given to elements having the same functions as those in the first to fourth embodiments and the conventional example.

In this embodiment, as shown in FIG. 12, the round conductors 41, which are likely to be displaced by rolling, are not laminated as they are, but as shown in FIG.
0b (FIG. 11), the round conductor 41 is crushed into a conductor 46 having an oblong cross section when viewed from the cross section.
a and 42b to be laminated.

Thus, the arrangement pitch in the width direction of the conductor 46 can be reliably set as designed.
Further, since the thickness of the conductor 46 is smaller than that of the round conductor 41, the adhesion between the insulating films 42a and 42b on both sides in the non-conductor portion is facilitated.

[0064]

According to the first and second aspects of the present invention, a supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel. A pair of heat rollers, which heat the pair of insulating films supplied from the supply roller and melt the adhesive layer while sandwiching and bonding the conductor with the insulating film, and a position where the heat roller sandwiches the conductor with the insulating film and the supply roller And a heater that blows hot air onto the surface of the insulating film between which the adhesive layer is formed, so that the heater and, if necessary, the auxiliary heat roller quickly and sufficiently before the insulating film reaches the heat roller. Can be heated. Therefore, the laminating speed of the flat cable is 4 times that of the conventional example.
Even if it increases from about 5 m / min to about 8 to 10 m / min, the lamination can be performed sufficiently and reliably, and the production efficiency can be improved.

Further, since the surface of the insulating film to which the adhesive layer has been applied can be directly heated by the heater, the thermal stress directly applied to the insulating film can be reduced. Therefore, the occurrence of heat shrinkage of the insulating film can be prevented, the adhesiveness is improved, and a flat cable having no inferior performance and quality can be easily manufactured.

Further, even when the thickness of the insulating film is large, the adhesive layer can be directly heated by the heater. Therefore, even when the adhesive layer is formed by using a material having a higher melting point, it can be manufactured without any problem.

According to the third to fifth aspects of the present invention, the take-up speed of the take-off roller for taking out the flat cable discharged from the heat roller is set faster than the discharge speed of the flat cable from the heat roller. Therefore, tension can be applied to the flat cable immediately after lamination. Therefore, regardless of the thickness of the conductor, the flat cable can be prevented from waving.

According to the sixth aspect of the present invention, a forming guide roller is formed corresponding to the shape of the flat cable whose thickness changes depending on the presence or absence of a conductor, and the forming guide roller and the smooth surface roller are used as a heat roller. Since the flat cable discharged from the flat cable is sandwiched and guided together with the smooth surface roller, the conductor can be prevented from being displaced in the flat cable. Also, by pressing the portion where the conductor is not disposed with the large diameter portion of the forming guide roller, the insulating films on both sides can be securely bonded together, and the adhesive layer is melted, and the insulating film and the conductor are Since the space between the conductors is completely filled, the waterproof property in the flat cable can be secured, and the short circuit between the adjacent conductors and the conductors can be prevented from coming off in the longitudinal direction.

According to the seventh aspect of the present invention, since one of the pair of heat rollers for lamination is an elastic roller, it corresponds to the thickness of the conductive portion protruding from one side of the flat cable. Thus, a part of the elastic roller can be deformed. At this time, since the non-deformed portion of the elastic roller presses the non-conductive portion of the flat cable, the insulating films on both sides are adhered and adhered to each other at the non-conductive portion, thereby improving waterproofness in the flat cable. Can be secured.

According to the eighth aspect of the present invention, since the positioning groove for guiding the round conductor to prevent displacement is formed on the surface of the heat roller, the circular groove is guided by the positioning groove. Thereby, the arrangement pitch of the round conductors can be reliably set as designed. In addition, the insulating films in the non-conductive portion can be securely pressed and adhered to each other by the surface of the heat roller.

According to the ninth aspect of the present invention, a plurality of round conductors in a parallel state are crushed by a rolling roller, and the crushed round conductors are sandwiched and laminated by a pair of insulating films. By preventing the pitch, the arrangement pitch of the round conductors can be reliably set as designed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a flat cable manufacturing device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a flat cable manufacturing device according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an uncorrugated flat cable.

FIG. 4 is a schematic diagram showing a flat cable manufacturing device according to a third embodiment of the present invention.

FIG. 5 is a schematic diagram showing a flat cable manufacturing device according to a third embodiment of the present invention.

FIG. 6 is a schematic diagram showing a flat cable manufacturing device according to a fourth embodiment of the present invention.

FIG. 7 is a schematic diagram showing a flat cable manufacturing device according to a fourth embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a flat cable using a round conductor.

FIG. 9 is a schematic diagram showing a flat cable manufacturing device according to a fifth embodiment of the present invention.

FIG. 10 is a view showing a heat roller of a flat cable manufacturing device according to a fifth embodiment of the present invention.

FIG. 11 is a schematic diagram showing a flat cable manufacturing apparatus according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view showing a round conductor in a state of being crushed by a rolling roller in a sixth embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a general flat cable manufacturing process.

FIG. 14 is a sectional view showing a general flat cable.

FIG. 15 is a schematic diagram showing a conventional flat cable manufacturing apparatus.

FIG. 16 is a sectional view showing the flat cable in a wavy state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor 1 2a, 2b Insulating film 5a, 5b Supply roller 6a, 6b Guide 7a, 7b Heat roller 11a, 11b Sub-heat roller 12a-12d Heater 15 Flat cable 17a, 17b Take-off roller 19a, 19b Drive shaft 21 Conductive part 22 Non-conductive part 23 Forming guide roller 24 Large diameter part 25 Small diameter part 26 Smooth surface roller 27 Boundary part 29 Gap 31 Elastic roller 32 Metal roller 3a, 3b Adhesive layer 40a, 40b Rolling roller 41 Round conductor 42a, 42b Insulating film 43 Flat cable 46 conductors 44a, 44b heat roller 45 positioning groove

Claims (9)

[Claims] 1. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel, and the pair of insulating films supplied from the supply roller are heated. A pair of heat rollers for sandwiching and bonding the conductor with the insulating film while melting the adhesive layer, and the insulating film between a position where the heat roller sandwiches the conductor with the insulating film and the supply roller. And a heater for blowing hot air onto the surface on which the adhesive layer is formed. 2. The flat cable manufacturing apparatus according to claim 1, wherein a position between the blowing position of the heater and the supply roller is
A flat cable manufacturing apparatus further comprising a sub-heat roller that preheats the insulating film while guiding the insulating film to the spray position of the heater. 3. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel, and the pair of insulating films supplied from the supply roller are heated. A pair of heat rollers for sandwiching and bonding the conductor by the insulating film while melting the adhesive layer, and a take-up roller for taking up a flat cable discharged from the heat roller, wherein the flat cable by the take-up roller is provided. Wherein the take-up speed of the flat cable is set higher than the discharge speed of the flat cable from the heat roller. 4. The flat cable manufacturing apparatus according to claim 3, wherein a rotational driving torque of the take-up roller is set to be larger than a rotational driving torque of the heat roller. 5. The flat cable manufacturing apparatus according to claim 3, wherein a rotation shaft of one of the pair of heat rollers is rotationally driven by a predetermined drive source. A flat cable manufacturing apparatus, wherein a rotating shaft of the other heat roller is rotatably supported, the one heat roller is made of metal, and the other heat roller is made of rubber. 6. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel, and the pair of insulating films supplied from the supply roller are heated. And a pair of heat rollers for sandwiching and bonding the conductor with the insulating film while melting the adhesive layer, and the outer peripheral surface is formed smoothly, and the heat roller is arranged near the discharge of the flat cable. A flat surface roller, and a forming guide roller formed to correspond to the shape of the flat cable having a thickness changed depending on the presence or absence of a conductor and guiding the flat cable discharged from the heat roller together with the flat surface roller. The forming guide roller has a small diameter formed corresponding to a thickness of a portion where the conductor of the flat cable is disposed. When the flat cable manufacturing apparatus comprising a large diameter portion which is formed to correspond to the thickness of the conductor is not disposed portion of the flat cable. 7. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, and a plurality of linear conductors are received in parallel, and the pair of insulating films supplied from the supply roller are heated. And a pair of heat rollers for sandwiching and bonding the conductor with the insulating film while melting the adhesive layer, and one of the pair of heat rollers is an elastic roller. apparatus. 8. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, a plurality of round conductors being received in a parallel state, and heating of the pair of insulating films supplied from the supply roller. A pair of heat rollers for sandwiching and bonding the round conductor with the insulating film while melting the adhesive layer, and a positioning groove is formed on a surface of the heat roller to guide the round conductor to prevent displacement. A flat cable manufacturing apparatus characterized in that: 9. A supply roller for supplying a pair of insulating films each having an adhesive layer formed thereon, a pair of rolling rollers for crushing and discharging a plurality of parallel round conductors, and discharging after being crushed by the rolling rollers. Receiving the round conductors in a parallel state, heating the pair of insulating films supplied from the supply roller to melt the adhesive layer, and sandwiching the round conductors with the insulating film to bond the pair of heats. A flat cable manufacturing device including a roller.