JP4371126B2 - Flat cable manufacturing equipment - Google Patents

Description

  The present invention relates to a flat cable manufacturing apparatus used for wiring of consumer equipment, OA equipment, in-vehicle electronic equipment, and the like.

  Conventionally, for the purpose of saving space and weight, there has been a flat cable in which a plurality of linear conductors having a flat cross-sectional shape arranged in parallel with a gap between two insulating films are sandwiched. As a manufacturing method, there is a method in which a plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between two strip-shaped insulating films and both insulating films are welded to each other by ultrasonic waves.

  Further, as this type of related technology, for example, there are those disclosed in Patent Literature 1 and Patent Literature 2.

Special Table 2000-502833 JP-A-48-020077

  However, according to the conventional method for manufacturing a flat cable by ultrasonic welding, both insulating films on both sides of each linear conductor are intermittently ultrasonically welded in the length direction of the flat cable, such as water. When the conductive material enters the flat cable, there is a possibility that the linear conductors are short-circuited through the non-welded portion.

  Then, in view of the said problem, this invention aims at providing the manufacturing apparatus of the flat cable which prevents the short circuit between each linear conductor effectively.

  The technical means for solving the above-mentioned problem is that the plurality of linear conductors arranged in parallel with a predetermined interval are sandwiched between two strip-shaped insulating films, and both of the linear conductors facing each other on both sides of the linear conductors. In a flat cable manufacturing apparatus for manufacturing a flat cable by ultrasonically welding an insulating film in a continuous state in the length direction of the insulating film, the ultrasonic welding means for performing the ultrasonic welding includes an ultrasonic vibration. Horns, and anvils arranged to face the horns, the opposing surfaces of the horns and the anvils have protrusions that are in contact with both sides of each of the linear conductors from both sides of the two insulating films, A plurality of protrusions are formed along the moving direction with the same interval as the width of the insulating film in the protruding direction. After forming the intermittent welded part by ultrasonic welding, the two insulating films are moved by the distance along the moving direction, and the welded parts are sandwiched between the two insulating films by the projections of the horn and the anvil. There is an interval between the ultrasonic welding.

  According to the flat cable manufacturing apparatus of the present invention, the ultrasonic welding means for performing ultrasonic welding includes a horn that imparts ultrasonic vibration and an anvil disposed to face the horn, and the horn and the anvil face each other. A plurality of protrusions that are in contact with the surface on both sides of each linear conductor from both sides of each insulating film are formed along the moving direction with the same interval as the width of the insulating film in the protruding direction. After the two insulating films are sandwiched between the horn and anvil protrusions and ultrasonically welded to form intermittent welds, the horn and anvil protrusions are moved by an interval along the moving direction. The two insulation films facing each other on both sides of each linear conductor are continuous in the length direction of the insulation film by adopting a structure in which the two weld films are ultrasonically welded with both insulation films sandwiched between them. To produce a flat cable in which each linear conductor is sandwiched by ultrasonic welding, and even when a conductive material such as water infiltrates into the flat cable, there is no risk of short-circuiting between the linear conductors, There is an advantage that a short circuit between the linear conductors can be effectively prevented.

  Hereinafter, a first embodiment of the first invention will be described with reference to the drawings. FIG. 1 is a diagram showing a manufacturing apparatus used in a flat cable manufacturing method. In this manufacturing apparatus, a predetermined feeding line is shown. A plurality of conductor rolls 2 in which the linear conductor 1 is accommodated are provided on the most upstream side of P (moving direction), and a pair of film rolls 6 in which a pitch roller 3 and an insulating film 4 are accommodated and a pair are disposed on the downstream side. The sandwiching rollers 8 are sequentially provided.

  In each conductor roll 2, a copper or copper alloy linear conductor 1 is wound and stored in advance, and a plurality of conductor conductors 2 are provided in accordance with the number of linear conductors 1 arranged in parallel in the manufactured flat cable 10. Yes. And in this embodiment, since it is comprised so that the flat cable 10 with which the four linear conductors 1 may be arranged in parallel is manufactured, the four conductor rolls 2 are arrange | positioned. In the present embodiment, a rectangular conductor having a rectangular cross section is used as each linear conductor 1.

  The linear conductors 1 drawn out from the conductor rolls 2 are fed between the pair of sandwiching rollers 8 in a state of being aligned in a parallel state having a predetermined interval by the pitch roller 3.

  The pair of film rolls 6 are provided above and below the feeding line P, and each band-shaped insulating film 4 is wound and stored in advance. At this time, each insulating film 4 is constituted by a film-like substrate formed of a flexible and ultrasonic weldable resin such as polyethylene terephthalate (PET). The insulating films 4 drawn out from the pair of film rolls 6 are also fed between the sandwiching rollers 8.

  Here, each linear conductor 1 is fed to the ultrasonic welding section 12 disposed on the downstream side of the sandwiching roller 8 in a state of being sandwiched between the upper and lower insulating films 4.

  The ultrasonic welding part 12 is provided with the horn 14 and the anvil 15 which provide the ultrasonic vibration each provided in the position which pinches | interposes the feed line P from the upper and lower sides, as FIG. 1 thru | or FIG.

  The horn 14 provided on the upper side of the feeding line P has a width dimension larger than the width dimension of the insulating film 4, and the abutting portion that abuts on the insulating film 4 is a flat vibration imparting portion in the width direction. 14a, and the vibration imparting portion 14a can be slidably contacted with the outer surface (upper surface) of the upper insulating film 4 fed along the feeding line P over the entire width direction. It is arranged in a vertical posture. Thereby, the ultrasonic vibration generated by an ultrasonic vibration generation mechanism (vibrator or the like) (not shown) is applied to the horn 14 so that the horn 14 can vibrate in the width direction of the insulating film 4. .

  In addition, the anvil 15 is configured by a substantially columnar columnar body that is rotatably supported around an axis orthogonal to the feeding line P of the insulating film 4, and the parallel arrangement is provided on the outer peripheral surface thereof. In the regions corresponding to the outer positions of the linear conductors 1 between the respective linear conductors 1 and at both ends, the ridges 16 that are continuous along the circumferential direction are formed. The protruding portion 16 has a structure in which wide portions 16a and narrow portions 16b are alternately provided at a predetermined pitch along the circumferential direction.

  And the support shaft 15a provided along the axial center of the anvil 15 is arrange | positioned along the direction orthogonal to the said feed line P below the feed line P, and the support shaft 15a can rotate freely. When the insulating film 1 is fed along the feeding line P, the insulating film 1 is pressed against the lower surface of the insulating film 1 while sequentially pressing the protrusions 16 provided on the outer peripheral surface thereof. In accordance with the feeding of the insulating film 1, it is configured to rotate in synchronization with the feeding of the insulating film 1 by being driven to rotate or driven by a rotation driving unit (not shown).

  When the insulating film 4 sandwiching the plurality of linear conductors 1 is fed between the horn 14 and the anvil 15 in a state where ultrasonic vibration is applied to the horn 14, the vibration applying portion 14a of the horn 14 is provided. Is in sliding contact with the entire outer surface (upper surface) of the insulating film 4 in the width direction, and each protrusion 16 of the anvil 15 is directly below the vibration applying portion 14a except for the region where each linear conductor 1 is disposed ( The both sides of each linear conductor 1 are in contact with the outer surface (lower surface) of the insulating film 4, and ultrasonic vibration energy is applied to the two insulating films 4 in a state where the insulating films 4 are in pressure contact with each other, as shown in FIG. Insulating films 4 are ultrasonically welded to both sides of each linear conductor 1.

  Then, along with the feeding of the insulating film 4, each protrusion 16 of the anvil 15 comes into contact with the lower surface of the insulating film 4 while the vibration applying portion 14 a of the horn 14 is in sliding contact with the upper surface of the insulating film 4. Thus, both insulating films 4 are ultrasonically welded in a continuous state along the length direction.

  The flat cable 10 is formed by this ultrasonic welding, and then the flat cable 10 is sequentially wound and accommodated on the winding roll 19 via the guide roller 18.

  According to the manufacturing method of the flat cable 10 by the manufacturing apparatus configured as described above, the two insulating films 4 facing each other on both sides of each linear conductor 1 in the flat cable 10 are continued along the length direction thereof. Since the ultrasonic welding is performed in a state, even when a conductive material such as water enters the flat cable 10, the short-circuiting between the respective linear conductors 1 is effective without the possibility of short-circuiting between the respective linear conductors 1. Can be prevented.

  Further, as shown in FIG. 6, since the welded portion 21 ultrasonically welded is composed of a wide portion and a narrow portion, the welded portion in the flat cable 10 is compared with the structure in which the wide portion is ultrasonically welded over the entire length. The film strength of the film can be secured well, and the workability in terminal peeling is also good.

  FIG. 7 shows a second embodiment, in which the protrusions 16 in the anvil 15 are structured to have the same width in the circumferential direction. Other configurations are the same as described above.

  Therefore, in this case, as shown in FIG. 8, the welded portion 21 of the flat cable 10 is formed to have the same width along the length direction, and the conductive material such as water is flat cable as in the first embodiment. Even if it penetrates into 10, the short circuit between each linear conductor 1 can be effectively prevented, without the possibility that each linear conductor 1 may short-circuit each other.

  FIG. 9 shows a third embodiment, in which the protrusion 16 in the anvil 15 is configured to have the same width in the circumferential direction, and the recess 16c is formed in the protrusion 16 at a predetermined pitch along the circumferential direction. It is said that. Other configurations are the same as described above.

  Therefore, in this case, the welding portion 21 of the flat cable 10 has a structure in which the welding area in the width direction is different along the length direction as in the first embodiment, and the same effect as in the first embodiment is obtained. can get.

  FIG. 10 shows an embodiment of the second invention, which is configured in substantially the same manner as the above-described embodiment of the first invention. The same components are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the upstream horn 24 and the downstream horn 25 to which the ultrasonic welding portion 12 applies ultrasonic vibration, and the upstream anvil 26 disposed to face the upstream horn 24 and the downstream horn 25, respectively. The downstream anvil 27 is provided with a predetermined interval along the feeding line P of the insulating film 4.

  The upstream side anvil 26 and the downstream side anvil 27 are fixedly arranged, and the upper surface of each anvil 26, 27, that is, the abutting portion that comes into contact with the insulating film 4 is formed as a flat surface.

  Further, the upstream horn 24 and the downstream horn 25 are provided with columnar vibration imparting bodies 29 and 30 supported by support shafts 29a and 30a so as to be rotatable around an axis perpendicular to the moving direction of the insulating film 4. As shown in FIG. 11, the protrusions 31 and 32 that are in contact with the insulating film 4 on both sides of each linear conductor 1 have the same pitch in the circumferential direction on the outer peripheral surface of each vibration imparting body 29 and 30. That is, they are formed to protrude with the same interval.

  Then, as shown in FIG. 12, the welded portion 33 is obtained by ultrasonic welding at a predetermined pitch in the length direction of the insulating film 4 by the upstream horn 24 and the upstream anvil 26, and a gap between the welded portions 33 is formed. As shown in FIG. 13, the downstream horn 25 and the downstream anvil 27 are filled with a welded portion 34 ultrasonically welded at a predetermined pitch in the length direction of the insulating film 4.

  Therefore, according to the manufacturing method of the flat cable 10 by the manufacturing apparatus of this embodiment, the both insulating films 4 facing each other on both sides of each linear conductor 1 in the flat cable 10 are connected to the upstream horn 24, the upstream anvil 26, and the downstream. The side horn 25 and the downstream anvil 27 are ultrasonically welded, and the welded portions 33 and 34 are in a state where the ultrasonic welded portions are continuous along the length direction of the insulating film 4. Even if it is in the case of intruding into the wire 10, it is possible to effectively prevent short-circuiting between the linear conductors 1 without fear of short-circuiting between the linear conductors 1.

  At this time, if the width of the protrusion 31 in the vibration imparting body 29 and the width of the protrusion 32 in the vibration imparting body 30 are configured to be different from each other, wide and narrow, respectively, the first embodiment of the first invention Similarly, the film strength can be secured satisfactorily and the workability in terminal peeling can be improved.

  FIG. 14 shows an embodiment of the third invention, which is configured in substantially the same manner as the above-described embodiment of the first invention. The same components are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in this embodiment, the horn 36 and the anvil 37 in the ultrasonic welding part 12 are each configured in a rectangular block shape, and are opposite to each other from both sides of each linear conductor 1 from both sides of both insulating films 4. A plurality of projecting portions 38 and 39 to be contacted are formed along the feeding line P with the same interval T as the width S along the feeding line P of the insulating film 4 at the projecting portions 38 and 39. Structure.

  Then, the two insulating films 4 are sandwiched between the protrusions 38 and 39 of the horn 36 and the anvil 37 and ultrasonically welded. After the intermittent welds 33 as shown in FIG. 12 are formed, the two insulating films 4 are moved in the moving direction. , And then by ultrasonic welding with both insulating films 4 sandwiched between the projections 38 and 39 of the horn 36 and the anvil 37, as shown in FIG. The gaps between the previous welded portions 33 are configured to be filled with the subsequent welded portions 34.

  Thereafter, the insulating film 4 is moved for a length L along the feeding line P of the horn 36 and the anvil 37, ultrasonic welding is performed in the same manner as described above, and the same operations are sequentially repeated.

  Therefore, according to the manufacturing method of the flat cable 10 by the manufacturing apparatus of this embodiment, the both insulating films 4 facing each other on both sides of each linear conductor 1 in the flat cable 10 are connected to the protrusions 38 of the horn 36 and the anvil 37. Each protrusion 39 is ultrasonically welded a plurality of times with the position shifted by a predetermined interval T, and the ultrasonic welded portion is continuous along the length direction of the insulating film 4 by each welded portion 33, 34. Even when a conductive material such as water penetrates into the flat cable 10, it is possible to effectively prevent a short circuit between the linear conductors 1 without fear of a short circuit between the linear conductors 1.

  In addition, in each said embodiment, although the flat cable provided with the four linear conductors 15 is illustrated, the structure etc. provided with the five linear conductors 15 may be sufficient, and the linear conductor 15 The number of is not limited at all.

It is a schematic explanatory drawing which shows the manufacturing method and manufacturing apparatus of a flat cable which concern on 1st Embodiment of 1st invention. It is an enlarged view of a horn. It is the left side view. It is an enlarged view of an anvil. It is the left side view. It is a top view of the manufactured flat cable. It is a side view of the anvil which concerns on 2nd Embodiment of 1st invention. It is a top view of the manufactured flat cable. It is a side view of the anvil which concerns on 3rd Embodiment of 1st invention. It is a front view of the ultrasonic welding part which concerns on embodiment of 2nd invention. It is a left view of the vibration imparting body. It is a top view of the insulating film in the manufacturing process. It is a top view of the manufactured flat cable. It is a perspective view of the ultrasonic welding part which concerns on embodiment of 3rd invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Line conductor 4 Insulating film 10 Flat cable 12 Ultrasonic welding part 14 Horn 15 Anvil 16 Projection part 24 Upstream horn 25 Downstream horn 26 Upstream anvil 27 Downstream anvil 29 Vibration imparting body 30 Vibration imparting body 31 Protrusion 32 Projection 36 Horn 37 Anvil 38 Projection 39 Projection

Claims (1)

A plurality of linear conductors arranged in parallel at a predetermined interval are sandwiched between two strip-shaped insulating films, and the two insulating films facing each other on both sides of each linear conductor are continuously arranged in the length direction of the insulating film. In a flat cable manufacturing apparatus that manufactures a flat cable by ultrasonic welding in a state where
The ultrasonic welding means for performing the ultrasonic welding includes a horn for applying ultrasonic vibration, and an anvil disposed to face the horn.
Protrusions that are in contact with the opposing surfaces of the horn and the anvil on both sides of the respective linear conductors from both sides of the two insulating films have the same interval as the width of the insulating film in the direction of movement of the insulating films. Are formed along the moving direction,
Ultrasonic welding is carried out by sandwiching both insulating films between the projections of the horn and the anvil, and after intermittent formation of the welded portions, the two insulating films are moved along the moving direction by the distance between the projections of the horn and the anvil. The apparatus for producing a flat cable, wherein the welded portions are ultrasonically welded with both insulating films interposed therebetween.

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