JP2002343158A - Manufacturing device of flat cable and manufacturing method of flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to cut a margin width with a high precision, and enable to cut in a high speed. SOLUTION: In the vicinity or in the inside of an anvil 42 in order to weld by ultrasonic wave welding, a cutting blade 51 to cut the end in the widthwise direction of insulating films 11, 13 is installed while receiving ultrasonic wave. Cutting work can be made at the same time or nearly at the same time of the ultrasonic wave welding, thereby the cut-off precision increases compared with that of the conventional work wherein welding work position and the cutter are separated. Further, work efficiency increases because cooling is not applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable manufacturing apparatus and a flat cable manufacturing apparatus for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel at a predetermined interval are sandwiched between a pair of strip-shaped insulating films. About the method.

[0002]

2. Description of the Related Art First conventional technology Conventionally, for the purpose of saving space and weight, a plurality of linear conductors having a rectangular cross section and arranged in parallel with a space between two insulating films are sandwiched. There is a flat cable, and as this type of insulating film, for example, a polyester film having a base material of polyethylene terephthalate (PET) having good insulating properties and having a heat-soluble adhesive layer on one surface thereof has been used.

FIG. 17 shows an example (first prior art) of a conventional method of manufacturing this kind of flat cable, wherein each of the insulating films 1 and 3 is made of a resin base material such as PET. A heat-soluble thick adhesive layer having a thickness of about 40 μm provided on one surface of the base material, with the linear conductor 5 interposed between the insulating films 1 and 3,
The insulation films 1 and 3 are passed between heating rollers 7 for thermocompression bonding, the adhesive layer is melted by conduction heating, and the insulation films 1 and 3 are bonded to each other.

[0004]

[Problems to be solved by the first prior art] However, in the above-mentioned conventional manufacturing method, the adhesive layers of the insulating films 1 and 3 are melted by conduction heating and adhered to each other. Since the adhesive layer is sufficiently melted and bonded to obtain a sufficient adhesive force, there is a problem that the processing time is extremely long and the productivity is poor.

In addition, since the insulating films 1 and 3 and the linear conductor 5 are firmly adhered to each other over the entire surface by a thick adhesive layer, the insulating films 1 and 3 and the linear conductor 5 and the like are disposed at the time of disposal or recycling. It is difficult to separate and disassemble the insulating films, and the disassembled insulating films 1 and 3 have a problem that the recyclability is poor because the adhesive layer components are mixed.

{Second prior art} In order to solve the above-mentioned problems of the first prior art, for example, an insulating film having no thin adhesive layer, or Japanese Patent Application Laid-Open No. 9-259662.
Production of a flat cable by ultrasonic welding using an insulating film having an adhesive layer with a thickness of 1 to 3 μm using the same material as the insulating film substrate (Second conventional technique).

In the method of the second prior art, as shown in FIG. 18, a pair of insulating films 11 and 13 having a thin adhesive layer (not shown) on one side is formed by a pair of upper and lower film rolls 1.
7 and 19, and is supplied between a pair of upper and lower heating rollers 21 and 22 heated to 170 ° C., and is drawn out of the conductor roll 23 via a pair of upper and lower pitch guides 25 and 26. The supplied plurality of parallel linear conductors 15 are arranged in the heating roller 21, 21 in an aligned state.
Feed between two. At this time, each linear conductor 15 is connected to both insulating films 1 supplied between both heating rollers 21 and 22.
1 and 13.

Then, the insulating films 11 and 13 between the linear conductors 15 are sandwiched by the cooperation of the ultrasonic welding machine 27 having the concave and convex grooves and the upper surface of the anvil 29. The insulating films 11 and 13 in the sandwiched portion are heated and melted by the ultrasonic vibration, and the heated and melted portion is cooled and fixed by the subsequent injection of cooling air by the cooling means.

[0009] Thereafter, the widthwise ends of the insulating films 11, 13 called ears are cut at a stretch by a cutter 30, and then the upper and lower interlocked with a stepping motor arranged downstream of the welding step. Due to the intermittent driving of the pair of stepping rollers 31 and 32, the heat-fused insulating films 11 and 13 are fed out, and are sequentially wound up on the winding roll 35 via the guide roller 33.

{Problems of the Second Prior Art} In the second prior art, when the widthwise ends of both the insulating films 11 and 13 after welding are cut by the cutter 30, the cutter 30 and the ultrasonic welding machine 27 are connected. There was a reasonable distance between them.

However, if a proper distance is set between the cutter 30 and the ultrasonic welding machine 27 in this manner, the insulating films 11 and 13 may be displaced in the width direction between the cutter 30 and the ultrasonic welding machine 27. There is a possibility that the margin widths of 11 and 13 are difficult to be constant.

In the second prior art, the stepping rollers 31 and 3 are used in order to secure ultrasonic welding.
2 was intermittently driven to feed the insulating films 11 and 13 as low as possible, so that high-speed processing was difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flat cable manufacturing apparatus and a flat cable manufacturing method which enable high-precision cutting of a margin width and high-speed cutting.

[0014]

Means for Solving the Problems In order to solve the above problems,
The invention according to claim 1 is a flat cable manufacturing apparatus for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between a pair of strip-shaped insulating films. A supply roller for supplying a pair of the insulating films formed thereon, and the linear conductors are received in a parallel state, and the pair of insulating films supplied from the supply roller are heated to melt the adhesive layer. A pair of heating rollers for sandwiching the linear conductor with the insulating film and temporarily bonding the same, and a welding anvil for heating one surface of one of the insulating films discharged from the heating roller and sandwiching the linear conductor. And a cutting anvil arranged in the vicinity of the welding anvil and cutting the widthwise ends of the insulating films,
Ultrasonic welding is performed between the non-conductive portions of the insulating films on the welding anvil where the linear conductors are not arranged, and ultrasonic waves are also oscillated with respect to the portion corresponding to the cutting position on the cutting anvil. And an ultrasonic welding machine.

According to a second aspect of the present invention, there is provided the flat cable manufacturing apparatus according to the first aspect, wherein the cutting anvil is housed in the guide case, and is disposed in the guide case in a width direction of the insulating film. A pair of cutting blades for cutting both end portions, and a plurality of spacers that fill the gap between the side walls of the guide case and the respective cutting blades and the gap between the both cutting blades in the guide case. It is provided.

According to a third aspect of the present invention, in the flat cable manufacturing apparatus according to the second aspect, the cutting anvil adjusts a position of the guide case in a width direction of the flat cable. Is further provided.

According to a fourth aspect of the present invention, there is provided a flat cable manufacturing apparatus for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel at predetermined intervals are sandwiched between a pair of strip-shaped insulating films. A supply roller for supplying the pair of insulating films each having an adhesive layer formed thereon, and the linear conductors being received in a parallel state, and heating the pair of insulating films supplied from the supply roller to form the adhesive layer. A pair of heating rollers for sandwiching the linear conductor with the insulating film and temporarily bonding the same, and heating one surface of one of the two insulating films discharged from the heating roller and sandwiching the linear conductor. And a composite anvil that cuts the width direction ends of the two insulating films, and the linear shape of the two insulating films on the composite anvil. Free conductor portions to each other the body is not disposed with ultrasonic welding, in which and a ultrasonic welding machine which oscillates an ultrasonic wave with respect to the portion corresponding to the cutting position in the composite anvil.

According to a fifth aspect of the present invention, there is provided the flat cable manufacturing apparatus according to the fourth aspect, wherein the composite anvil is formed by a rotating shaft and a plurality of the linear conductors penetrated by the rotating shaft. A plurality of substantially annular welding guides arranged corresponding to the separated portions; and a plurality of welding guides penetrated by the rotating shaft and arranged outside the welding guides to cut the widthwise ends of the insulating films. A substantially annular cutter.

According to a sixth aspect of the present invention, there is provided the flat cable manufacturing apparatus according to the fifth aspect, wherein the composite anvil is penetrated by the rotating shaft to form a gap between the plurality of welding guides. It further comprises a filling spacer.

According to a seventh aspect of the present invention, there is provided a flat cable manufacturing method for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel at predetermined intervals are sandwiched between a pair of strip-shaped insulating films. With a pair of heating rollers, a plurality of linear conductors are received in parallel and sandwiched between a pair of insulating films, while the insulating film is heated to melt an adhesive layer formed on one surface of the insulating film. A temporary bonding step of temporarily bonding the non-conductive portions of the both insulating films on which the linear conductors are not arranged, and supplying the two temporarily bonded insulating films to a welding anvil and ultrasonic welding with an ultrasonic welding machine. A welding anvil disposed in the vicinity of the welding anvil in a state where ultrasonic waves are oscillated on the insulating film by the ultrasonic welding machine. The cutting blade is intended and a cutting step of cutting the widthwise end portions of the two insulating films.

An eighth aspect of the present invention is a flat cable manufacturing method for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between a pair of strip-shaped insulating films. With a pair of heating rollers, a plurality of linear conductors are received in parallel and sandwiched between a pair of insulating films, while the insulating film is heated to melt an adhesive layer formed on one surface of the insulating film. A temporary bonding step of temporarily bonding the non-conductive portions of the two insulating films on which the linear conductors are not disposed, and supplying the temporarily bonded two insulating films onto a welding guide of a composite anvil on a roller to provide an ultrasonic wave; At the same time as ultrasonic welding with the welding machine, in the state where ultrasonic waves are oscillated against the insulating film with the ultrasonic welding machine, the welding guide and the welding guide in the composite anvil. In which and a welding cutting step of cutting the end portion in the width direction of the both insulating film annular cutter provided on the shaft.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a schematic diagram 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 second conventional technique shown in FIG. 18 are denoted by the same reference numerals.

As shown in FIG. 1, this flat cable manufacturing apparatus is applied to a single ultrasonic welding machine 41 as shown in FIG.
The welding anvil 42 (FIGS. 3 and 4) and the cutting anvil 43 (FIGS. 5 and 6) are arranged close to each other, and immediately after the two insulating films 11 and 13 are ultrasonically welded on the welding anvil 42, the ultrasonic While continuing the ultrasonic vibration in the welding machine 41, the two insulating films 11, called ears,
13 are cut at once at one end in the width direction.

More specifically, this flat cable manufacturing apparatus uses the same film rolls 17, 19,
Heating rollers 21 and 22, conductor roll 23, pitch guides 25 and 26, stepping rollers 31 and 32, guide roller 33 and winding roll 35, and both insulating films 11 and 13 temporarily bonded by heating rollers 21 and 22 are joined together. An ultrasonic welding machine 41 and a welding anvil 42 for ultrasonic welding;
A cutting anvil 43 is provided which cuts the widthwise ends of both insulating films 11 and 13 at a stretch while ultrasonic vibration is applied by the ultrasonic welding machine 41.

Each of the insulating films 11 and 13 is, for example, a second
The same thing as the prior art is used, and specifically, it is mainly composed of a strip-shaped film made of a thermoplastic resin. For example, the same as one side of the base material of the strip-shaped film made of PET having a film thickness of 100 μm. A film (A4100 manufactured by Toyobo Co., Ltd.) having a polyester adhesive layer having a thickness of 1 μm is used as a thin adhesive layer made of a series of materials.

Each of the linear conductors 15 is, for example, the same as that of the second prior art, and is, for example, a soft copper wire having a thickness of 0.15 mm and a width of 1.5 mm and a rectangular cross section. .

The ultrasonic welding machine 41 is common to the second prior art in that a horn 41a for oscillating ultrasonic waves is formed at the tip, but in the second prior art, the horn has an ultrasonic oscillation area of an anvil. (Reference numeral 29 in FIG. 18), the ultrasonic oscillation area of the horn 41a of the ultrasonic welding machine 41 is limited to only the vicinity of the ultrasonic welding point. Is formed longer than the second prior art in the direction of travel, so that not only the ultrasonic welding point with the welding anvil 42 but also the region opposing the cutting anvil 43 is formed. .

The welding anvil 42 is fixedly supported on the upper surface of the base 46. As shown in FIGS. 3 and 4, the upper end of the welding anvil 42 is a heating side 44 which is in contact with and heats the lower insulating film 13. The heating side 44 is formed on the heating side 44 in accordance with the arrangement pitch of the linear conductors 15. The projection 45 is formed. Then, the convex portion 45 is in contact with a portion of the lower insulating film 13 where the linear conductor 15 is not disposed (a non-conductive portion), and the non-conductive portion is heated to about 170 ° C. In cooperation with the ultrasonic heating by the horn 41a, the portions of the insulating films 11 and 13 where the linear conductors 15 are not disposed are heated and melted. still,
In a portion where the convex portion 45 is not formed (that is, a concave portion between the end portion of the heating side 44 and the adjacent convex portion 45), ultrasonic welding of the insulating films 11 and 13 is not performed. Therefore, ultrasonic welding is not performed at the end in the width direction of the flat cable, and the temporary bonding state by the conductive heating of the heating rollers 21 and 22 is maintained, and the portion where the linear conductor 15 is disposed is also formed by the thin adhesive layer. Each insulating film 11,
13 can be prevented from being firmly adhered to the linear conductor 15. This makes it easy to peel off the insulating films 11 and 13 from the linear conductor 15 after the flat cable is discarded.

The cutting anvil 43 is an air cylinder 4 whose vertical movement is adjusted by an actuator 47a fixedly supported on the upper surface of a base 46 common to the welding anvil 42.
7, a top-open box-shaped slide table 48 supported on the upper end of the air cylinder 47, and a top-open box guide case 50 housed in the slide table 48.
A pair of guide rods 49 projecting from both ends of the guide case 50 and spanning both ends of the side wall 55 of the slide table 48; and end portions in the width direction of the insulating films 11 and 13 housed and supported in the guide case 50. Blades 51 for cutting the blades, and a plurality of spacers 53a to 53f that fill the gap between the side walls 52 of the guide case 50 and the respective cut blades 51 and the gap between the two cut blades 51 in the guide case 50. And

The actuator 47a includes the air cylinder 4
7 is moved up and down to adjust the contact strength when it comes into contact with the lower insulating film 13.

The base of each guide rod 49 is integrally fixed to the side wall 52 of the guide case 50. The distal end of the guide rod 49 is formed in a wound screw shape, penetrates a through hole 57 formed in the side wall 55 of the slide table 48, and is screwed and fixed by a pair of bolts 56 outside the side wall 55. Is done. As described above, the both ends of the guide rod 49 are fixed and fixed by the bolts 56 on the side wall 55 of the slide table 48, so that the insulating films 11 and 1 are formed in the slide table 48.
The position of the guide case 50 in the width direction 3 is determined. That is, these elements 47, 47a, 48, 49,
Reference numeral 56 functions as a position adjusting means for adjusting the position of the guide case 50.

The cutting blade 51 is formed in a plate shape, and the upper end of the cutting blade 51 has a sharp shape so as to cut the insulating films 11 and 13 at a stretch.

The spacers 53a to 53f are used in combination with spacers of various specifications having a plurality of widths, whereby it is possible to cut the widthwise ends of flat cables of various widths. .

A method of manufacturing a flat cable using the above-structured flat cable manufacturing apparatus will be described.

First, the insulating films 11 and 13 are pulled out from the upper and lower film rolls 17 and 19 and supplied between a pair of upper and lower heating rollers 21 and 22 for thermocompression bonding.

A plurality of linear conductors 15 are pulled out from the respective conductor rolls 23, and a pair of upper and lower pitch guides 2 are formed.
5, 26 via a predetermined distance (for example, 2.5 mm
The heating roller 2 is arranged in parallel with the
It is supplied between 1 and 22.

At this time, the heating rollers 21 and 22
The linear conductors 15 in the aligned state are sandwiched between the upper and lower insulating films 11 and 13 between the heating rollers 21 and 22. In this way, when the insulating films 11 and 13 and the linear conductors 15 pass between the heating rollers 21 and 22, the insulating films 11, 1
The thin adhesive layer of No. 3 is conductively heated and melted by the heating rollers 21 and 22 to obtain a temporary bonding state in which they are bonded to each other (temporary bonding step).

Then, the insulating films 11 and 13 in the temporary bonding state, which pass between the two heating rollers 21 and 22 and are sandwiched in a state where the linear conductors 15 are arranged in parallel, are located downstream. Guided to the welding process.

In the welding step, the insulating films 11 and 13 in the temporarily bonded state are supplied between the welding anvil 42 and the ultrasonic welding machine 41 with the linear conductor 15 interposed therebetween. At this time, the ultrasonic welding machine 41 is
Insulation film 1 on anvil 42 welded by ultrasonic wave at 1a
It oscillates toward 1,13. And the welding anvil 42
In a state where the horn 41a of the ultrasonic welding machine 41 and the upper surface of the welding anvil 42 cooperate with each other, the insulating films 11 and 13 are heated and melted in a non-conductor region between the linear conductors 15 (ultrasonic welding). ) Is done.

After that, it is arranged downstream of the welding step.
By the intermittent drive of the pair of upper and lower stepping rollers 31 and 32 interlocked with the stepping motor, the heat-welded insulating films 11 and 13 are operated to move downstream, and are welded by the ultrasonic welding machine 41 for the insulating films 11 and 13. The moved portion moves onto the cutting anvil 43.

On the cutting anvil 43, the ultrasonic oscillation is continued by the horn 41a of the ultrasonic welding machine 41, and the ears of the insulating films 11, 13 are kept in a state where both the insulating films 11, 13 are heated. The widthwise end portion (this portion is not ultrasonically welded and is in a temporarily bonded state by heat transfer heating) is cut at once (cutting step).

Then, the insulating film 1 whose ears have been cut off
The rollers 1 and 13 are sequentially wound around a winding roll 35 via a guide roller 33.

As described above, according to the flat cable manufactured by the manufacturing method according to the present embodiment, the convex portion 45 of the heating side 44 of the welding anvil 42 is formed by the linear conductor 15 of the lower insulating film 13. In contact with the non-arranged portion (non-conductive portion), the non-conductive portion is heated, and in cooperation with the ultrasonic heating by the horn 41a of the ultrasonic welding machine 41, the non-conductive portion corresponding to the convex portion 45 is heated. Are heated and melted (ultrasonic welding) between the insulating films 11 and 13 at both ends of the heating side 44 where the convex portions 45 are not formed. It does not have to be done. Therefore, ultrasonic welding is not performed at the width direction end of the flat cable,
The heating rollers 21 and 22 are kept in a temporary bonding state by conduction heating, and the portions where the linear conductors 15 are disposed are also formed by the thin adhesive layers so that each of the insulating films 11 and 13 is connected to the linear conductors 15.
Since it is possible to prevent the flat cable from being firmly adhered, the insulating films 11 and 13 can be easily peeled off from the linear conductor 15 after the flat cable is discarded. Excellent in nature.

Further, since the adhesive layers of the insulating films 11 and 13 are also made thin and the adhesive layers are made of the same material as the base material, recyclability is also excellent in this respect.

Further, a method of heat-welding the insulating films 11 and 13 themselves by ultrasonic waves is used, and compared with the conventional case where a thick adhesive layer is melted, instantaneous heat welding and its heat welding are performed. The part can be cooled, the processing time can be shortened, and the horn 41 of the ultrasonic welding machine 41 can be cooled.
This is a structure having a plurality of a, which can be heated and welded at multiple points at the same time. Here, there is an advantage that the speed of the production line can be improved and the productivity is excellent.

Immediately after joint welding between the horn 41a of the ultrasonic welding machine 41 from the upper surface side and the welding anvil 42 on the lower surface side, the ultrasonic welding machine 41 applies ultrasonic vibration to the welding anvil 42 to apply the ultrasonic vibration. Since the ears of both insulating films 11 and 13 are cut at a stretch by the cutting anvil 43 arranged close, the ears of the insulating films 11 and 13 are cut by the cutter 30 which is separated by a suitable distance after welding. Compared with the second prior art,
Positional deviation of the cutting position in the width direction of the first and the 13th hardly occurs. Therefore, the margin width of the insulating films 11 and 13 is easily fixed, and the yield of the flat cable is improved.

Further, since the end of the flat cable in the width direction is cut by the cutting anvil 43 while oscillating the ultrasonic waves, even if the flow speed of the flat cable is increased, it is not only on the welding anvil 42 but also on the welding anvil 42. Also, the cutting operation can be performed on the cutting anvil 43 while continuing the ultrasonic welding, and the flat cable can be efficiently manufactured while sufficiently performing the ultrasonic welding.

Second Embodiment FIG. 7 is a view showing an anvil 61 of a flat cable manufacturing apparatus according to a second embodiment of the present invention. The flat cable manufacturing apparatus according to this embodiment is different from the composite anvil 61 shown in FIG. 7 in place of the anvil 29 of the second prior art shown in FIG.
You are using

The composite anvil 61 has a plurality of welding guides 6 formed in an annular shape on the outer periphery of the rotating shaft 62.
3. A structure in which a pair of cutters 64 and a plurality of spacers 65 are attached in combination, and each member 63, 64, 65 is fixed at both ends of the rotating shaft 62 by a pair of fixed rings 65a.

As shown in FIGS. 7 and 8, a part of the outer peripheral surface of the rotating shaft 62 prevents the members 63, 64, 65 from rotating with respect to the rotating shaft 62 along the axial direction of the rotating shaft 62. A protruding ridge 66 is formed. A screw hole 70 for screwing a fixing member 69 such as a screw is formed in a part of the outer peripheral surface of the rotating shaft 62.

The welding guide 63 is formed in a substantially annular shape as shown in FIGS. 9 and 10, and comes into contact with a portion of the insulating film 13 where the linear conductor 15 is not disposed (a non-conductive portion). The portion is heated to about 170 ° C., and is installed only at a position corresponding to the non-conductor portion, corresponding to the arrangement pitch of the linear conductors 15. An insertion hole 71 into which the rotating shaft 62 is inserted is formed at the center of the welding guide 63, and an engaging groove 72 for engaging with the protrusion 66 of the rotating shaft 62 is formed in the insertion hole 71. Have been.

The cutter 64 is formed in a substantially annular shape as shown in FIGS. 11 and 12, and the widthwise ends (ears) 68 of the insulating films 11, 13 are cut by a cutting blade 73 formed on the outer peripheral portion. The diameter of the cutting blade 73 of the cutter 64 is larger than the diameter of the welding guide 63. In the center of the cutter 64, an insertion hole 74 into which the rotating shaft 62 is inserted is formed.
An engagement groove 75 for engaging with the protrusion 66 of the rotating shaft 62 is formed.

The spacer 65 is formed in a substantially annular shape as shown in FIGS.
The spacing between the welding guides 63 is determined by being interposed between the welding guides 63, and the portion where the linear conductors 15 are arranged (the conductors) corresponding to the arrangement pitch of the linear conductors 15 is determined. Part) is installed only in the position corresponding to. The diameter of the spacer 65 is set smaller than the diameter of the welding guide 63, and when the welding guide 63 contacts the non-conductive portions of the insulating films 11 and 13 as shown in FIG.
The conductive portions of the insulating films 11 and 13 protruded by the thickness of 5 are not contacted. Spacer 65
An insertion hole 76 into which the rotating shaft 62 is inserted is formed at the center of the boss 6.
An engagement groove 77 for engaging with 6 is formed.

As shown in FIGS. 15 and 16, the fixed ring 65a is formed in a substantially annular shape and has, for example, the same diameter as that of the spacer 65, and has a center in which the rotary shaft 62 is inserted. A hole 78 is formed.
The engagement groove 7 for engaging with the protrusion 66 of the rotating shaft 62
9 are formed. In addition, a part of the fixed ring 65a includes:
A through hole 80 is formed through the fixing member 69.

The other configuration is the same as that of the second prior art shown in FIG. 18, and the description is omitted.

When using the composite anvil 61 described above,
A pair of insulating films 11 and 13 having an adhesive layer (not shown) on one side are pulled out from upper and lower film rolls 17 and 19 similar to the second prior art shown in FIG.
A pair of upper and lower heating rollers 21 for thermocompression bonding,
22 (see reference numerals 21 and 22 in FIG. 18), and is pulled out from the conductor roll (see reference numeral 23 in FIG. 18) and a pair of upper and lower pitch guides (see reference numerals 25 and 26 in FIG. 18). Are supplied between the heating rollers 21 and 22 in an aligned state. At this time, each of the linear conductors 15 is divided into the two insulating films 11 and 1 supplied between the two heating rollers 21 and 22.
3 between.

As shown in FIG. 7, the insulating films 11 and 13 between the linear conductors 15 are sandwiched by the cooperation of the ultrasonic welding machine 27 and the welding guide 63 of the composite anvil 61, and the ultrasonic welding machine 27 The insulating films 11 and 13 in the sandwiched portion are heated and melted by the ultrasonic vibration of the above.

At the same time, while the cutter 64 of the composite anvil 61 presses the lugs 68 of the insulating films 11 and 13 toward the ultrasonic welding machine 27, the cutting blade 73 of the cutter 64
Cuts the ears 68 of the insulating films 11 and 13 at once (weld cutting step).

Here, the relative positional relationship between the cutter 64 and the welding guide 63 is adjusted by the spacer 65, and the fixed ring 65 located outside the cutter 64.
Since the position of the cutter 64 with respect to the rotation shaft 62 is fixed by fixing a with respect to the rotation shaft 62 with the fixing member 69, the insulating film 11,
The position accuracy of the 13 cutting positions is improved.

Thereafter, the insulating film 11 heated and welded by the intermittent drive of a pair of upper and lower stepping rollers (see reference numerals 31 and 32 in FIG. 18) arranged downstream of the welding step and interlocked with the stepping motor. , 13 are fed out and sequentially wound up on a take-up roll (see reference numeral 35 in FIG. 18) via guide rollers (see reference numeral 33 in FIG. 18).

As described above, on the welding guide 63 of the composite anvil 61, the insulating film 1 is
At the same time as the non-conductive portions 1 and 13 are welded, the lugs 68 of the insulating films 11 and 13 are cut by the cutter 64 installed coaxially with the welding guide 63, so that a suitable distance is left after welding. In comparison with the second conventional technique in which the cut portions of the insulating films 11 and 13 are cut by the cutter 30, the cut positions of the insulating films 11 and 13 in the width direction are less likely to be displaced. Therefore, the margin width of the insulating films 11 and 13 is easily fixed, and the yield of the flat cable is improved. In particular, the relative positional relationship between the welding guide 63 of the composite anvil 61 and the cutter 64 is adjusted by the spacer 65, and the fixed ring 65 a located outside the cutter 64 is fixed to the rotating shaft 62 by the fixing member 69. The rotation shaft 62 of the cutter 64
The ultrasonic welding and the ear 68
Is performed simultaneously, so that the accuracy of the cutting position is dramatically improved.

Further, as compared with the second conventional technique in which the lugs are cut off after cooling once after welding, the processing time can be shortened by eliminating the cooling time, and the flat cable can be manufactured efficiently.

In the above embodiment, a thin adhesive layer having a thickness of 1 μm is exemplified.
It may be about 1 to 3 μm.

Although the structure in which each of the insulating films 11 and 13 has a thin adhesive layer is illustrated, a structure without an adhesive layer may be used. In this case, the heating rollers 21 and
The temporary bonding step 2 is not required.

Then, the insulating film 1 having no adhesive layer
In the case where 1, 13 is used, the insulating film 1
In addition to the fact that the components 13 and 13 themselves are cheaper, the production cost can be reduced, there is also an advantage that disassembly is easy, good separation can be performed without mixing impurities, and recyclability can be further improved.

Further, in this embodiment, a flat cable provided with four linear conductors 15 is exemplified, but a structure having three or less or five or more linear conductors 15 may be employed. Often, the number of linear conductors 15 is not limited at all.

[0067]

According to the first and seventh aspects of the present invention, the vicinity of the welding anvil for heating one side of one of the two insulating films discharged from the heating roller and sandwiching the linear conductor, A cutting anvil that cuts the width direction ends of both insulating films is arranged, and an ultrasonic welding machine ultrasonically welds the non-conductive portions of the two insulating films on the welding anvil where the linear conductor is not arranged. Since the ultrasonic wave also oscillates at the portion corresponding to the cutting position on the cutting anvil, after welding, the width direction end of the insulating film was cut by a cutter spaced a suitable distance for cooling. Compared to the second related art, the displacement of the cutting position in the width direction of the insulating film is less likely to occur. Therefore, the margin width of the insulating film is easily fixed, and the yield of the flat cable is improved.

Further, as compared with the second conventional technique in which the lugs are cut after being cooled once after welding, the processing time can be reduced by eliminating the cooling time, and the flat cable can be manufactured efficiently.

According to the fourth, fifth and eighth aspects of the present invention, the single composite anvil is used to weld the non-conductive portion of the insulating film on the composite anvil by an ultrasonic welding machine, and at the same time, to perform insulation. Since the end of the film in the width direction is cut by the composite anvil itself, after welding, the edge of the insulating film is cut by a cutter which is separated by an appropriate distance for cooling as compared with the second prior art. Therefore, displacement of the cutting position in the width direction of the insulating film is less likely to occur. Therefore, the margin width of the insulating film is easily fixed, and the yield of the flat cable is improved.

Further, as compared with the second conventional technique in which the lugs are cut after being cooled once after welding, the processing time can be shortened by eliminating the cooling time, and the flat cable can be manufactured efficiently.

According to the second, third and sixth aspects of the invention, the cutting position of the width direction end of the insulating film can be easily adjusted and changed.

[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 side view showing a welding anvil and a cutting anvil of the flat cable manufacturing device according to the first embodiment of the present invention.

FIG. 3 is a front view showing a welding anvil.

FIG. 4 is a side view showing a welding anvil.

FIG. 5 is a front view showing a cutting anvil.

FIG. 6 is a side view showing the cutting anvil.

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

FIG. 8 is a side view showing a composite anvil.

FIG. 9 is a front view showing a welding guide.

FIG. 10 is a side view showing a welding guide.

FIG. 11 is a front view showing a cutter.

FIG. 12 is a side view showing a cutter.

FIG. 13 is a front view showing a spacer.

FIG. 14 is a side view showing a spacer.

FIG. 15 is a front view showing a fixed ring.

FIG. 16 is a side view showing a stationary ring.

FIG. 17 is a view showing a flat cable manufacturing apparatus according to a first prior art.

FIG. 18 is a view showing a flat cable manufacturing apparatus according to a second prior art.

[Explanation of symbols]

 11, 13 Insulating film 15 Linear conductor 17 Film roll 21, 22 Both heating rollers 23 Conductor roll 41 Ultrasonic welding machine 41a Horn 42 Welding anvil 43 Cutting anvil 44 Cutting blade 47 Air cylinder 47a Actuator 48 Slide table 49 Guide rod 50 Guide Case 51 Cutting blade 53a to 53f Spacer 56 Bolt 57 Through hole 61 Composite anvil 62 Rotating shaft 63 Welding guide 64 Cutter 65 Spacer 65a Fixed ring 66 Projection 69 Fixed member

Claims (8)

[Claims] 1. A flat cable manufacturing apparatus for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel at predetermined intervals are sandwiched between a pair of strip-shaped insulating films, wherein an adhesive layer is formed. A supply roller for supplying the pair of insulating films, respectively, and the linear film is received in a parallel state, and the insulating film is heated while heating the pair of insulating films supplied from the supply roller to melt the adhesive layer. A pair of heating rollers for sandwiching the linear conductor and temporarily bonding the same, and a welding anvil that is discharged from the heating roller and heats one surface of the two insulating films sandwiching the linear conductor, and the welding. A cutting anvil that is arranged near an anvil and cuts widthwise ends of the insulating films; and the cutting anvil on the welding anvil. Ultrasonic welding between the non-conductive portions of the edge film where the linear conductors are not arranged, and an ultrasonic welding machine that oscillates ultrasonic waves also for a portion corresponding to a cutting position in the cutting anvil. Flat cable manufacturing equipment. 2. The flat cable manufacturing apparatus according to claim 1, wherein the cutting anvil is provided in a guide case, and is used for cutting both ends of the insulating film in a width direction. A flat cable manufacturing apparatus comprising: a pair of cut blades; and a plurality of spacers that fill a gap between a side wall of the guide case and each of the cut blades and a gap between the two cut blades in the guide case. 3. The flat cable manufacturing apparatus according to claim 2, wherein the cutting anvil further includes a position adjusting unit that adjusts a position of the guide case in a width direction of the flat cable. . 4. A flat cable manufacturing apparatus for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel at predetermined intervals are sandwiched between a pair of strip-shaped insulating films, wherein an adhesive layer is formed. A supply roller for supplying the pair of insulating films, respectively, and the linear film is received in parallel, and the insulating film is heated while heating the pair of insulating films supplied from the supply roller to melt the adhesive layer. A pair of heating rollers for sandwiching the linear conductor and temporarily bonding the same, and heating one surface of one of the insulating films sandwiched between the linear conductors discharged from the heating roller and the insulating films A composite anvil that cuts the widthwise end of the composite anvil; and the linear conductor is not disposed among the two insulating films on the composite anvil. Free conductor portions to each other with ultrasonic welding, the flat cable manufacturing apparatus and a ultrasonic welder also oscillates ultrasonic waves to a portion corresponding to the cutting position in the composite anvil. 5. The flat cable manufacturing device according to claim 4, wherein the composite anvil is disposed in correspondence with a rotating shaft and a separated portion of the plurality of linear conductors penetrated by the rotating shaft. A plurality of substantially annular welding guides, and a substantially annular cutter that penetrates the rotating shaft and is disposed outside the welding guide and cuts the width direction ends of the insulating films. Flat cable manufacturing equipment. 6. The flat cable manufacturing apparatus according to claim 5, wherein the composite anvil further includes a spacer penetrated by the rotating shaft to fill a gap between the plurality of welding guides. manufacturing device. 7. A flat cable manufacturing method for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between a pair of strip-shaped insulating films, wherein a pair of heating rollers While receiving a plurality of linear conductors in a parallel state and sandwiching them between a pair of insulating films, the wires of the two insulating films are heated while melting the adhesive layer formed on one surface of the insulating film by heating the insulating film. A temporary bonding step of temporarily bonding a non-conductor portion where no conductors are arranged, and a welding step of supplying the two temporarily bonded insulating films onto a welding anvil and ultrasonic welding with an ultrasonic welding machine; In a state where ultrasonic waves are oscillated with respect to the insulating film by a sonic welding machine, the cutting blade of the cutting anvil arranged near the welding anvil, A step of cutting the width direction ends of both insulating films. 8. A flat cable manufacturing method for manufacturing a flat cable in which a plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between a pair of strip-shaped insulating films, wherein a pair of heating rollers While receiving a plurality of linear conductors in a parallel state and sandwiching them between a pair of insulating films, the wires of the two insulating films are heated while melting the adhesive layer formed on one surface of the insulating film by heating the insulating film. A temporary bonding step of temporarily bonding a non-conductor portion where no conductors are arranged, and supplying the two temporarily bonded insulating films onto a welding guide of a composite anvil on a roller and performing ultrasonic welding with an ultrasonic welding machine. At the same time, in a state where ultrasonic waves are oscillated with respect to the insulating film by the ultrasonic welding machine, an annular ring installed coaxially with the welding guide in the composite anvil. Flat cable manufacturing method and a welding cutting step of cutting the end portion in the width direction of the both insulating film with a cutter.