JP3867722B2 - Tape electric wire shaping method and apparatus - Google Patents

Description

  The present invention relates to the manufacture of a tape electric wire in which a conductor is covered with an insulating tape, and more particularly to a method and apparatus for shaping a tape electric wire in which the distance from the side edge of the insulating tape to the conductor is within an allowable range. .

  FIG. 6 shows the shape of the tape electric wire to be shaped according to the present invention as viewed from above, and FIG. 7 shows the cross section along the longitudinal direction, that is, the shape of the AA ′ cross section of FIG. In the tape electric wire 1 shown in the drawings, a plurality of strip-like conductors 2 are arranged in one plane, an insulating tape 3 is provided over the entire back surface of the plane formed by the conductor 2, and the surface is insulated. The covering portion provided with the tape 4 and the non-covering portion not provided with the insulating tape 4 are repeated in a constant pattern in the longitudinal direction. In other words, the double-sided coating part 5 in which both the front and back sides of the conductor 2 are covered with the insulating tape and the single-sided coating part 6 in which only one side of the conductor (the back side in the illustrated example) is covered with the insulating tape are alternately formed in the longitudinal direction. Has been. In the single-sided covering portion 6, the conductor 2 is exposed on the surface without the insulating tape 4, so that the insulating tape 3 and the conductor 2 on the back surface are alternately arranged at a constant pitch in the short direction of the tape electric wire when viewed from above.

  In this type of tape electric wire, in the process after the insulating tapes 3 and 4 are attached to the conductor 2, the center of the single-side covering portion 6 in the longitudinal direction of the tape electric wire is cut. FIG. 8 shows the shape of the tape electric wire as viewed from above, and FIG. 9 shows the cross section along the longitudinal direction, that is, the shape of the BB ′ cross section of FIG. In the short tape electric wire 1 separated in this way, the single-sided covering portions 6 and 6 at both ends in the longitudinal direction of the tape electric wire serve as fitting portions to the connectors.

  The maximum thickness of the double-sided coating part 5 of the tape electric wire 1 is very thin, about 50-400 micrometers. Therefore, a reinforcing plate 7 such as a plastic plate having a thickness of about 200 μm is attached to the insulating tape for the purpose of reinforcing the back surface of the single-side covering portion 6, that is, the surface to which the insulating tape 3 is applied.

  When manufacturing a tape electric wire, first, a wide tape electric wire in which a plurality of tape electric wires 1 shown in FIG. 6 are arranged in parallel is manufactured, and then separated by a slitter having a thin razor blade. Cut into one tape wire 1 at a time.

  In this case, the distance from the side edge of the insulating tapes 3 and 4 to the center of the outermost conductor 2, that is, the distance e1 and the distance e2 in FIG. There is a problem that the phenomenon of deviating from the allowable value frequently occurs due to the meandering of the tape electric wire 1 and the product defect rate becomes high.

  The tape electric wire 1 is fitted to the connector with reference to the edge surfaces 8 and 9 on both sides of the single-side coated portion 6, that is, the surfaces 8 and 9 that are at the distance e1 or the distance e2 from the center of the outermost conductor 2. Therefore, if the distance e1 and the distance e2 of the manufactured tape electric wire 1 deviate from the ideal value for the distance E1 or the distance E2, the metal contact portion inside the connector does not contact the conductor, resulting in poor conduction. Therefore, a product in which the distance e1 and the distance e2 are out of the allowable value is defective.

  In the production line of the tape electric wire 1, the line speed is tried to be as high as possible in order to improve productivity, so it is very difficult to suppress the meandering of the tape electric wire 1. If the line speed is lowered in order to suppress this meandering, the productivity drop will push up the product price and the market competitiveness will decline.

  Accordingly, an object of the present invention is to solve the above-described problems and provide a method and apparatus for shaping a tape electric wire in which the distance from the side edge of the insulating tape to the conductor is within the allowable range.

In order to achieve the above object, according to the method of the present invention, a double-sided coating part in which both sides of a conductor are coated with an insulating tape and a single-sided coating part in which only one side of a conductor is covered with an insulating tape are alternately formed in the longitudinal direction. When shaping the tape wire to the specified dimensions, the tape wire is formed in advance so that the dimension in the short direction of the insulating tape is larger than the specified size, the exposed conductor surface of the tape wire is photographed, and the tape wire short The conductor position in the hand direction is extracted, an insulation tape cutting line is set at a predetermined distance from this conductor position, and the tape wire cutting line is punched with a die to cut off the excess in the short direction of the insulating tape. Is.

Shooting conductor exposed surface of the tape cable is carried out in place of performing the mold punching, set the cut line of the insulating tape by processing the image, subjected to punching to fit the mold in this ablation line May be.

Further, the apparatus of the present invention defines a tape electric wire in which a double-sided coating part in which both sides of a conductor are covered with an insulating tape and a single-sided coating part in which only one side of a conductor is covered with an insulating tape are alternately formed in the longitudinal direction. In the shaping device for shaping into dimensions, the tape is used in a place where the tape electric wire in which the short direction dimension of the insulating tape is formed in advance in the longitudinal direction is run in the longitudinal direction and the die punching provided in the course of running is performed. A photographing means for photographing the conductor exposed surface of the electric wire , a setting means for extracting the conductor position in the short direction of the tape electric wire from the image , and setting a cutting line of the insulating tape at a predetermined distance from the conductor position, and for this setting Accordingly, there is provided a mold moving means for moving the mold in the short direction of the tape electric wire in order to punch out the cutting line of the tape electric wire with the mold.

  The present invention exhibits the following excellent effects.

  (1) The distance from the side edge of the insulating tape to the conductor is surely within the allowable range for the ideal distance E1 or the distance E2. That is, the manufacturing accuracy is improved. Therefore, the product defect rate can be kept low.

  (2) The distance from the side edge of the insulating tape to the conductor can be managed, and it can be expected to increase the line speed of the production line.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, in the shaping method of the present invention, a tape electric wire 1a in which the short direction dimension of the insulating tapes 3 and 4 is slightly larger than a prescribed dimension is formed in advance, and the tape electric wire 1a is punched out with a mold. Then cut off the excess in the short direction of the insulating tapes 3 and 4. Specifically, the conductor exposed surface of the tape electric wire 1a in which the short direction dimension of the insulating tapes 3 and 4 is larger than the prescribed dimension is photographed at a place where the die is punched together with the fixing points 10 and 11 in the background, The conductor center positions 12 and 13 in the short direction of the tape electric wire are extracted from the image, the insulating tape cutting lines 14 and 15 are set at predetermined distances E1 and E2 from the conductor center positions 12 and 13, and the fixing points 10 and 15 are set. 11 represents the cutting line position of the insulating tape, and the mold (not shown) is moved from the fixed origin position (not shown) to this cutting line position. Combine and punch. By this method, for example, the excess in the short direction (hatched portions in the figure) 16 and 17 of the insulating tapes 3 and 4 on both sides of the single-side covered portion 6 in the short direction of the tape wire are cut off.

  This ensures that the distance from the side edge of the insulating tape to the conductor is within the allowable range for the ideal distance E1 or E2. Therefore, the product defect rate can be kept low and these distances can be managed, so that the line speed of the production line can be increased.

  Next, a shaping apparatus that performs shaping continuously with the shaping method of the present invention will be described.

  As shown in FIG. 2, this shaping device includes a double-sided coating part 5 in which both sides of the conductor 2 are covered with insulating tapes 3 and 4, and a single-sided coating part 6 in which only one side of the conductor 2 is covered with the insulating tape 3. Is a shaping device for continuously shaping the long tape electric wire 1 formed alternately in the longitudinal direction into a prescribed dimension for each desired longitudinal part, and the transverse dimension of the insulating tapes 3 and 4 is prescribed in advance. Traveling means (see FIG. 4) for running the tape electric wire 1a formed larger than the dimension in the longitudinal direction, photographing means 22 for photographing the tape electric wire 1a at the die punching place 21 provided during the running, A setting means for setting a cutting line (see FIG. 1) of the insulating tapes 3 and 4 by processing, a mold moving means 24 for moving the mold 23 in the short direction of the tape electric wire 1a according to this setting, Double-side coating 5 and single-side coating A boundary sensor 26 that detects the boundary 25 between the tape wire 1a and the tape wire 1a is allowed to travel a predetermined distance lp (see FIG. 4) after the boundary 25 is detected. Traveling control means for guiding to the punching place 21. The setting means and the traveling control means can be realized by a computer.

  As FIG. 3 shows, the metal mold | die moving means 24 is realizable with the uniaxial movement table 31 which moves to the transversal direction of the tape electric wire 1a. The uniaxial moving table 31 is provided below the tape electric wire 1a so as to intersect the traveling tape electric wire 1a. The uniaxial moving table 31 is mounted with a punching device 32 including a mold 23, an ITV camera 33 constituting the photographing means 22, and an ITV camera illumination device (not shown). The punching device 32 and the ITV camera 33 are arranged so as to sandwich the tape electric wire 1a from both sides. The ITV camera 33 is supported by the column 34 and faces downward, and can photograph the tape electric wire 1a from directly above. Since the tape electric wire 1a is run with the conductor exposed surface facing upward, the ITV camera 33 can photograph the conductor exposed surface.

  As shown in FIG. 4, the traveling means of the tape electric wire 1a is composed of a delivery machine 41, a delivery dancer roll 42, a take-up pinch roller 43, a take-up dancer roll 44, a take-up machine 45 and several unsigned rollers. Has been. Reference numeral 46 denotes a mold installation unit in which the mold 23 and the photographing means 22 are installed, and the mold punching place 21 is included in the mold installation unit 46. The boundary sensor 26 is installed immediately upstream of the mold installation unit 46. Reference numeral 47 denotes an image processing apparatus. Reference numeral 48 denotes a computer. Moreover, although not shown in figure, the travel sensor which detects the travel distance of the tape electric wire 1a is attached to the take-up pinch roller 43, for example.

  Next, the operation of this shaping device will be described.

  The tape electric wire 1a is sent out from the sending machine 41 via the sending dancer roll 42. Since the tape electric wire 1a is very thin, if the tension is too strong or the tension fluctuates, wrinkles occur or meander. Therefore, a moderate and stable tension is given by the delivery dancer roll 42. While taking the tape electric wire 1a by the take-up pinch roller 43, the running distance is detected by the running sensor. When the boundary sensor 26 detects the boundary 25 between the double-sided covering portion 5 and the single-sided covering portion 6, the boundary sensor 26 travels a distance lp from the boundary sensor 26 to the die punching site 21, and the single-sided covering portion 6 of the tape electric wire 1 a. Is guided to an accurate position in the die punching place 21, and the tape electric wire 1a is stopped.

  Next, the ITV camera 33 is moved to the die punching place 21 by the uniaxial moving table 31. When the ITV camera 33 is at the die punching place 21, the die 23 is assumed to be at the origin position. The conductor exposed surface of the single-side coating portion 6 is photographed by the ITV camera 33. The image processing device 47 processes a captured image and performs shape measurement. The ablation lines 14 and 15 are set by this shape measurement. Based on the shape measurement result, the punching device 32 is moved to the die punching place 21 by the uniaxial moving table 31. At this time, the tape electric wire 1 a is inserted into the punching device 32. When the mold 23 is aligned with the cutting lines 14 and 15 and punching is performed, both sides of the single-side covered portion 6 in the short direction of the tape electric wire are shaped to a specified dimension. The punching residue generated by punching is sucked out by a removal device (not shown).

  Thereafter, the uniaxial movement table 31 is returned to its original position. The tape electric wire 1 a that has been shaped is wound around the winding machine 45 via the winding dancer roll 44.

  In the above operation, the boundary sensor 26 plays an important role in alignment in the longitudinal direction of the tape electric wire. As already described, the double-sided covering portion 5 and the single-sided covering portion 6 are repeatedly formed with a certain length, but actually there are variations, and a tolerance for this error is provided. For example, when the length of the double-sided coating part 5 is 100 mm, the allowable value of the length of the double-sided coating part 5 is about ± 1 mm. On the other hand, the length of the single-sided covering portion 6 is only 10 mm, for example, and if the tolerance is ± 1 mm, the accuracy is not good. Therefore, if the travel control is performed only by the travel distance of the tape electric wire 1a without detecting the boundary, the single-sided covering portion 6 is not guided to an accurate position in the die punching place 21, and an error occurs. If the double-sided coating 5 where the error reaches the maximum allowable value of -1.0 mm is repeated three times, a total of 3 mm of error accumulates, and this cumulative error becomes a large value with respect to the length of the single-sided coating 6 of 10 mm. Arise. Therefore, in the present invention, alignment is performed based on the boundary 25 detected by the boundary sensor 26.

  Even if the length of the double-sided covering portion 5 of the tape wire 1a is within the allowable range, if the error from the specified value is large, the boundary sensor 26 is used each time the tape wire 1a is run. The boundary 25 is detected and alignment is performed. When the error between the length of the double-sided covering portion 5 and the specified value is small, the alignment performed by detecting the boundary 25 may not be performed every time, and may be performed once every n times.

  The alignment of the mold 23 will be described in detail. The image processing device 47 detects the conductor of the outermost conductor 2 on one side of the one-side covering portion 6 from the image taken by the ITV camera 33, as shown in FIG. The distance e1 ′ between the center position 12 and the fixed point 10 is measured, and the distance e2 ′ between the conductor center position 13 of the outermost conductor 2 and the fixed point 11 on the other side is measured. Note that two fixed points 10 (11) may be provided as fixed points 10 and 10a (11 and 11a). These fixed points are arranged at a predetermined distance from the mold origin position. Therefore, by measuring the distances e1 ′ and e2 ′, the distances from the mold origin position (not shown) to the conductor center positions 12 and 13 can be measured. Using these distances e1 ′ and e2 ′, a distance lk for moving the mold 23 from the origin position is calculated, and the uniaxial movement table 31 is moved based on the distance lk. By punching the mold 23 along the cutting lines 14 and 15, the excess 16 and 17 in the short direction of the insulating tapes 3 and 4 are cut off. As a result, the side edges of the insulating tapes 3 and 4 are formed at positions where the distances from the conductor center positions 12 and 13 do not deviate from the allowable values for the ideal distances E1 and E2. The mold moving distance lk is calculated so that the distances from the conductor center positions 12 and 13 to the cutting lines 14 and 15 are equal to each other and do not deviate from the allowable value.

  Next, a specific example of the mold 23 will be described.

  FIG. 5 shows the concave side of the mold 23. The mold 23 has a recess 50 and a recess 51 at predetermined positions on a flat surface. The recess 50 and the recess 51 have a shape obtained by linearly cutting a rectangular corner. Although not shown, a corresponding convex portion is formed on the convex side of the mold 23. This metal mold 23 is for cutting out the trapezoidal excess 16 and 17 in the short direction shown in FIG.

  Next, another embodiment of the present invention will be described in comparison with the shaping apparatuses of FIGS.

  The ITV camera 33 that constitutes the photographing means 22 is not mounted on the uniaxial movement table 31 that constitutes the mold moving means 24, and is fixed to a place where the movement of the mold 23 is not obstructed. You may make it.

  The sending dancer roll 42 or the winding dancer roll 44 may be omitted.

  When the accuracy of the conductor center positions 12 and 13 of the outermost conductor 2 is good, the distance measurement may be performed only on the distance on one side, for example, the distance e1 ′.

  In the die punching, it is not necessary to punch two cut portions at the same time, and the punching may be performed with a time difference. In addition, a die may not be provided for each cut portion, and both cut portions may be punched one by one with a single die.

  The ITV camera 33 and the mold 23 may be moved in the longitudinal direction of the tape electric wire 1a. In this case, photographing and punching can be performed on the traveling tape electric wire 1a without stopping the tape electric wire 1a.

  The number of the fixed points 10 (11) may be one, two, or three or more.

  The distance between the fixed point 10 and the conductor center position 13 of the outermost conductor 2 on the opposite side may be measured instead of the distance e2 ′.

  By accurately setting the distance from the mold origin position to the ITV camera 33, the shooting field of view, the shooting angle, the magnification, etc. of the ITV camera 33, the actual position of the object photographed in the image and the distance within the image are set. The corresponding actual distance can be determined. Thereby, even if the fixed points 10 and 11 are omitted, the distance from the mold origin position to the conductor center positions 12 and 13 can be obtained.

  The punching shape of the mold may be a rectangle or other shapes.

  Instead of the ITV camera 33, a one-dimensional camera (one-dimensional image sensor) or the like may be used.

  The finish inspection may be performed by measuring the distance from the conductor center positions 12 and 13 to the side edges of the insulating tapes 3 and 4 after punching the die by the ITV camera 33 and the image processing device 47. This inspection may be a 100% inspection or a sampling inspection.

  2 to 4 may be installed in-line, that is, installed in a tape wire production line.

  Instead of fixing the distance between the recess 50 and the recess 51 in the mold 23, the distance between the recess 50 and the recess 51 may be made variable by dividing the mold 23 into two. Thereby, the common metal mold | die 23 can be used with respect to the tape electric wire from which the number of the conductors 2 differs, and it can respond by adjusting the distance between recessed parts. Accordingly, when a plurality of varieties having different numbers of conductors are manufactured, it is not necessary to prepare dies for each varieties, and it is only necessary to prepare dies having a number smaller than the number of varieties.

  One or more guide rollers may be provided immediately upstream and immediately downstream of the die punching place 21.

  Instead of detecting the travel distance of the tape electric wire 1a with a travel sensor, a pulse motor or a servo motor may be used as the motor of the take-up pinch roller 43, and the travel distance may be calculated by conversion from the number of travel command pulses.

It is a top view of the tape electric wire which showed the method of the present invention. It is a top view of the shaping device which shows one Embodiment of this invention. FIG. 3 is a three-dimensional view of the shaping device of FIG. 2. It is a block diagram of the traveling means in the shaping apparatus of FIG. It is a top view of the metal mold | die used for this invention. It is a top view of a tape electric wire. It is sectional drawing of a tape electric wire. It is a top view of the tape electric wire cut by fixed length. It is sectional drawing of the tape electric wire cut by fixed length.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Tape electric wire 2 Conductor 3,4 Insulation tape 5 Double-sided coating part 6 Single-sided coating part 10,11 Fixing point 12,13 Conductor center position 14,15 Cutting line 16,17 Extra short direction 21 Die punching place 22 Photographing Means 23 Mold 24 Mold moving means 25 Boundary 26 Boundary sensor 47 Image processing device 48 Computer

Claims (3)

When shaping a tape electric wire in which both sides of the conductor are covered with insulating tape and one side of the conductor covered with insulating tape alternately in the longitudinal direction, Form a tape electric wire with a shorter dimension in the short direction of the insulating tape, photograph the exposed conductor surface of the tape electric wire, extract the conductor position in the short direction of the tape electric wire from the image, and from this conductor position A method for shaping a tape electric wire, wherein an insulation tape excision line is set at a predetermined distance, and the tape electric wire excision line is punched out by a die to excise the excess in the short direction of the insulation tape. Shooting conductor exposed surface of the tape cable is carried out in place of performing the mold punching, set the cut line of the insulating tape by processing the image, performs the punching together the mold in this ablation line The method for shaping a tape electric wire according to claim 1. In a shaping device for shaping a tape electric wire in which both sides of a conductor are covered with an insulating tape and a single-side covered portion where only one side of the conductor is covered with an insulating tape are alternately formed in the longitudinal direction to a specified dimension, Photographing the exposed conductor surface of the tape electric wire at a place where the tape electric wire in which the short direction dimension of the insulating tape is previously formed larger than the prescribed dimension is run in the longitudinal direction and the die punching provided in the course of running is performed The photographing means, the conductor position in the short direction of the tape wire is extracted from the image , the setting means for setting the insulation tape cutting line at a predetermined distance from the conductor position , and the tape wire cutting according to this setting. An apparatus for shaping a tape electric wire, comprising: a die moving means for moving the die in a short direction of the tape electric wire in order to punch a line with the die .

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