JPH0574247A - Shield wire and its manufacturing method and device - Google Patents

Abstract

PURPOSE:To manufacture a new type of shield wire effectively. CONSTITUTION:A plural grooved rollers 11, 12, 13, 14 are disposed in the running direction of a harness (H) and a metal foil tape (T). For a device for winding the metal foil tape along the length of the harness for manufacturing a shield wire, the tape is disposed to form a smaller angle than 180deg. by a little angle alpha on the roller side before and after the grooved rollers, and a tension controlling device (40) for keeping a tape tension at a predetermined value is provided. Because the long tape is wound along the length of the harness vertically, the shield wire can be manufactured at a high speed, and the shield wire can effectively be manufactured at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel shielded electric wire, a manufacturing method thereof and a manufacturing apparatus. More specifically, the present invention relates to a shielded wire in which a tape made of a metal foil such as a copper foil or an aluminum foil is wound around a harness made of a metal wire or an optical fiber wire, and a method and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art A conventional shielded electric wire is made of a metal foil around a harness and has a width of, for example, 12 mm.
With a 0 mm pitch, a part of them is overlapped and wound in a spiral shape.

[0003]

In order to manufacture such a shielded electric wire, the bobbin wound with the tape is rotated around the harness while the harness is moved at a constant speed in the length direction of the bobbin. Wrap the tape unwound from the harness.

However, since the heavy bobbin is rotated, the upper limit of the rotation speed of the bobbin is as low as 400 rpm, for example, and therefore the moving speed of the harness, that is, the manufacturing speed of the shielded electric wire is as low as several meters per minute at the maximum. Since the production speed is slow as described above, there is a problem that the price of the shielded wire is high.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel shielded wire which can solve the problems associated with the above-described conventional shielded wire in which a tape is spirally wound around a harness.

Another object of the present invention is to provide a method and an apparatus capable of efficiently manufacturing the novel shielded wire according to the present invention.

[0007]

SUMMARY OF THE INVENTION In the present invention, the above-mentioned object is achieved by a shield wire comprising a harness and a metal foil tape which is parallel to the harness and is wound in the longitudinal direction of the harness. Here, the metal foil is preferably copper foil or aluminum foil.

As a method of manufacturing this novel shielded wire, a metal foil tape is brought into contact with the groove portions of a plurality of grooved rollers, a harness is placed on the tape, and the harness and the tape are run in the same direction. The tape is placed under a desired tension, and the angle formed by the tape on the roller side is 180 degrees before and after the plurality of roller contact points.
A method for manufacturing a shielded wire by winding a metal foil tape around the length of a harness is provided, which is set to be slightly smaller than 0 °.

Further, as the manufacturing apparatus of the present invention, a plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and the angle formed by the tapes on the roller side is before and after the plurality of grooved rollers. It is arranged so as to be slightly smaller than 180 °, and a tension control device for maintaining the tension of the tape at a predetermined value is provided, and a shield is formed by winding a metal foil tape in the longitudinal direction of the harness. An apparatus for manufacturing a wire is provided.

[0010]

In the method and apparatus of the present invention, a plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and the angle formed by the tapes on the roller side is before and after the plurality of grooved rollers. It is arranged so as to be slightly smaller than 180 °, and a tension control device for maintaining the tension of the tape at a predetermined value is provided. While the tape is placed under the desired tension, it is brought into contact with the grooves of multiple grooved rollers, and a harness is placed on the tape so that the harness and tape run in the same direction. Since the angle formed by the tape on the roller side before and after the point is set to be slightly smaller than 180 °, the tape is slightly bent with the roller contact point as a fulcrum when viewed in the longitudinal direction at the contact point with each roller. On the other hand, when viewed in the cross-sectional direction of the tape, both sides of the tape are closed in the direction in which the harness is wrapped by the tension of the tape and the waist of the tape. By performing the above steps in each roller, a long tape made of a metal foil is wound in the longitudinal direction (longitudinal direction) of the harness to obtain the shielded wire of the present invention. Thus, the present invention allows shielded wires to be manufactured efficiently and, therefore, inexpensively.

In the present invention, it is important to arrange the rollers as described above. Further, as described above, since the both side edges of the tape come close to each other every time the tape passes through the rollers, the grooves (preferably V-shaped cross section) formed on the peripheral surfaces of the plurality of rollers are sequentially closed as seen in the running direction of the tape. (That is, the angle of the V-shape is smaller).
In order to ensure the effect of wrapping the harness by the tension and waist of the tape described above, it is preferable that the roller located at the most downstream side of the plurality of rollers in the tape running direction is stationary. Also in this case, wear of the final roller can be reduced by appropriately manually rotating and fixing the final roller around the support shaft by a predetermined angle.
Further, the tape delivered from the final roller may be pressed by the pressing roller to further ensure the wrapping of the harness with the tape.

Further, in order to set the tension acting on the tape to a desired value in the method and apparatus of the present invention, the tension control device includes a rotating shaft rotatably supported by the bearing case,
A tension detecting arm having a roller that is connected to one end of the rotating shaft and is in contact with the running tape at the tip, and a sensor that is connected to the other end of the rotating shaft and swings as the tension detecting arm moves to operate the sensor. It is preferable that the tape tension is controlled by an arm, and the tape feed speed is adjusted according to the sensor output.

Further, the processing performance of the tape is affected by the processing atmosphere temperature, and the workability is lowered especially at low temperatures. In preparation for such a situation, by providing a box near the grooved rollers and supplying heated air to heat the tape running on the grooved rollers to the box, the tape loosens almost uniformly. It is heated and the workability is improved.

Further, in order to continue the production of the shielded wire without interruption even if the tape supply bobbin becomes empty, an accumulator device is provided on the tape supply side, and when the remaining amount of the supply tape bobbin becomes small, The tape immediately before the end may be stored in the accumulator, and the tape may be connected to a new bobbin while supplying the storage tape. This accumulator device includes a plurality of guide rollers provided at fixed positions, movable guide rollers provided between the guide rollers so as to be movable up and down, and a tape supply bobbin provided closer to the supply bobbin than the guide rollers. It is preferable that the device comprises a device for holding the end of the tape when the remaining amount is exhausted.

Further, a device for detecting the edge of the tape supplied from the bobbin and a device for moving the tape supply bobbin in the axial direction of the bobbin based on a signal from the detection device are provided to traverse the tape in the axial direction of the bobbin ( It is also possible to reduce the fluctuation in tension due to the traverse of the tape at the time of unwinding even when using the bobbin wound in a lap manner by reciprocating right and left).

[0016]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The entire shielded wire manufacturing apparatus according to the present invention is shown in FIG. As shown in FIG. 1, the shielded wire manufacturing apparatus according to the present invention comprises a tape molding unit 10, a dancer 20, an accumulator 30, a tension control unit 40, a tape edge control device 50, and a tape joining device 60.

As shown in FIGS. 1 and 2, the tape molding section 10 includes a first roller 11, two second rollers 12 and a third roller 12.
The roller 13 and the fourth roller 14 are provided from upstream to downstream (from right to left in FIGS. 1 and 2) in the tape running direction.

As shown in FIG. 3, V-shaped grooves 11a to 14a are provided on the peripheral surface of each of the rollers 11 to 14, and narrow small-diameter portions 11b to 14b are formed in the central portion. There is. As shown in FIG. 3, the grooves 11a to 14a of the rollers 11 to 14 have a large angle .theta.1 formed by the two sides of the V-shape in the first roller 11 and an angle .theta.2 in the second roller 12 of .theta.1. And the angle θ3 at the third roller 13 is smaller than θ2. Then, in the fourth roller 14, the groove 1
Both side edges of 4a are substantially parallel.

The lever 17 is rotatable around the rotation axis of the second roller located in the center, and two second rollers 12 and three third rollers 13 are rotatably provided on the lever 17. By rotating the lever 17 to adjust the position, the positional relationship between the two second rollers 12 and the third roller 13 can be finely adjusted.

The above-mentioned first to fourth rollers 11 to 14 are set such that the angle formed by the tape T on the roller side before and after the contact point of the tape T on each of the rollers 11 to 14 is smaller than 180 ° by a slight angle (α). is doing. Note that α
The angle is set appropriately, but is set to an angle less than 10 °.

The first roller 11 to the third roller 13 are rotatably provided on the machine base. The first roller to the third roller 13 may be driven by power as needed. The fourth roller 14 located at the final position is stationary so as not to rotate. The fourth roller 14 of this embodiment has eight fixing holes 14c on its side surface so that it can be rotated at 45 ° (1/8 rotation) with respect to the machine stand and can be stopped at that position. It has become. By gradually rotating and using the roller in this manner, wear of the roller 14 can be reduced.

A pressing roller 15 is provided above the exit side of the fourth roller 14 so as to press the tape T and the harness H coming out of the fourth roller 14 from the outside of the tape T. Further, a guide roller 16 is rotatably provided in front of the first roller 11.

In FIG. 2, the tape T is a guide roller 16
After being guided from the lower right side of the vehicle, after traveling around its peripheral surface, it is guided by the first roller 11, and further fed to the second roller 12, the third roller 13, and the fourth roller 14. The harness H is supplied from the upper right on the tape T sent.

As described above, the rollers 11 to 14 with grooves are provided in the running direction of the harness H and the metal foil tape T, and the angle formed by the tape on the roller side is 180 ° before and after each of the rollers 11 to 14. It is arranged so as to be smaller by an angle α.

FIG. 4 is a view showing the operation of the method and apparatus of the present invention. A front view of the tape T being guided on a series of rollers 12 to 14, a tape T on each roller 12 to 14 and a harness. A sectional view showing the state of H is shown thereabove.

As shown in the front view of FIG. 4, the tape T has rollers 11 to 14, for example, the second roller 1 shown second from the left.
By contacting the second roller 2, the tape T is slightly bent in the longitudinal direction before and after the second roller 12. By bending the long tape T in the longitudinal direction in this manner, as shown in FIG.
As shown in the sectional view of FIG. 1, both side edges of the tape T are bent toward each other. As a result, the harness H on the tape T is wrapped with the tape T. The tape T wraps the harness H by repeating this procedure for each of the rollers 12 to 14.

As described above, in the method and apparatus of the present invention, the tension of the tape T placed under the constant tension of the tape T and its waist are used to wrap the harness H. Further, the processing performance and physical properties of the tape T are easily affected by the processing atmosphere temperature, and the physical properties of the tape may change especially at low temperatures. In preparation for such a situation, in the present invention, a heating device such as 70 shown in FIG.
It is provided in the vicinity of -14.

The heating device 70 has a structure as shown in FIG. That is, a rectangular room surrounded by four sides 71, 72, 73, 74 on the rollers 11 to 14 (see FIG.
(See (a)), and hot air is supplied from a duct 77 opened on the side edge 73. And bottom 74 to 7
The projecting sides of Nos. 5 and 76 are projected, and the heated air is blown from the bottom toward the tape T running on the rollers 11 to 14. A rectangular hole 74a is formed between the protruding sides 75 and 76 of the bottom surface 74 from which heated air is blown. Further, when the temperature of the heating device is raised by the air supplied into the heating device 70 for blowing hot air,
Punching plate 7 to prevent burns when touched by human hands
A protective plate 78 made of 8 is put on the work surface side.

With the above-mentioned structure of the heating device,
The heated air once supplied into the box blows out from the hole at the bottom of the box, so that the tape T is uniformly heated by the air having a uniform temperature.

Further, in the present invention, in order to wrap the harness H by using the tension of the tape T, it is important to control the tension of the tape T to a desired value. To this end,
The tension sensor 40 is provided as shown in FIG. 3, and the tension controller 46 adjusts the feeding speed of the tape T according to the tension detected by the tension sensor 40 to maintain the tape T at a desired tension.

In particular, the tape T processed in the present invention has a very narrow width, and therefore the structure of the tension / tension detecting device 40 is specially devised. That is, as shown in FIG. 6, the tension detecting arm 42 and the sensor arm 44 are rotatably projected from the belling case 43, the tension detecting roller 41 is rotatably supported by the tension detecting arm 42, and the bearing is also supported. The tip of a sensor arm 44 formed integrally with the tension detection arm 42 via the case 43 operates a sensor 45 such as an MB sensor manufactured by Nireco Corporation. With such a structure, the tension fluctuation of the tape T having a narrow width can be reliably detected.

Further, in the present invention, a plurality of bobbins 8 are provided.
An accumulator 30 is provided so that the tape T supplied from Nos. 1 and 82 can be continuously supplied. The accumulator 30 is composed of a plurality of rollers 31 for steady feeding and an accumulating roller 33 provided on a bracket 32 that can be raised and lowered. When the remaining amount detection sensor (not shown) provided in the vicinity of the bobbin detects that the remaining amount of the bobbin is low, the bracket 32 of the accumulator 30 descends, and the rollers 31, 32 form a zigzag path. Store the tape T in the path.

At the same time, the cylinder 65 of the tape connecting device 60 is operated to rotate the arm 63 around the pin 64 and press the fixed nip rubber 62 at its tip against the roller 61 to press the end of the tape T. wear. During this time, the tip of the new bobbin is manually adhered to the tape T at the rear end of the old bobbin. During this operation, the tape T stored along the zigzag path stored in the accumulator 30 is delivered to the tape forming unit 10.

As described above, the damper roller 21 is provided in the damper device 20 in order to reduce the fluctuation of the tension acting on the tape T due to the operation of the accumulator device 30.

The narrow tape T is attached to the bobbins 81, 82.
In order to wind a large amount of the tape, the tape T is often traversed in the axial direction of the bobbins 81 and 82, that is, the tape T is reciprocated left and right. In such a case, the position of the tape T sent out is swung left and right along with the traverse. In the present invention, the end portion of the side edge of the tape T, that is, the H position is detected by the sensor 51,
A bobbin 81, 82 is moved in the direction perpendicular to the paper surface in FIG. 1 by an actuator (not shown) in response to a detection signal of the sensor 51, so that the position of the tape T fed out is always substantially constant. In this way, by keeping the tape position always constant, the tension fluctuation due to the traverse of the tape T is prevented.

[0037]

According to the present invention, a plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and the angle formed by the tape on the roller side is 180 ° before and after the plurality of grooved rollers. A tension control device that is arranged so as to be slightly smaller and that maintains the tension of the tape at a predetermined value is provided. While the tape is placed under the desired tension, it is brought into contact with the grooves of multiple grooved rollers, and a harness is placed on the tape so that the harness and tape run in the same direction. The angle that the tape makes on the roller side before and after the point is 180
Since it is set to be slightly smaller than 0 °, the tape is bent slightly with the roller contact point as the fulcrum when viewed in the longitudinal direction at the contact point with each roller, while when viewed in the cross-sectional direction of the tape, Due to the tension and the waist of the tape, both side edges of the tape are closed in the direction of wrapping the harness. By performing the above steps in each roller, a long tape made of a metal foil is wound in the longitudinal direction (longitudinal direction) of the harness to obtain the shielded wire of the present invention at a high speed. Thus, the present invention allows shielded wires to be manufactured efficiently and, therefore, inexpensively.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus according to the present invention.

FIG. 2 is an enlarged front view of the tape molding section shown in FIG.

3 (a) to (d) are side views and (e) is a front view of (d) showing a roller used in the tape molding section shown in FIG.

FIG. 4 is a schematic front view showing the operation of the tape molding section shown in FIGS. 1 to 3.

5A and 5B show a box body provided on an upper portion of the tape molding portion shown in FIGS. 1 to 3, in which FIG. 5A is a front view, FIG. 5B is a front view of a protective cover, and FIG. (D) is a bottom view of the main body, and (e) is a plan view showing blowout holes formed in the main body.

FIG. 6 is an enlarged front view of a sensor unit.

FIG. 7 is a plan view of FIG. Three

[Explanation of symbols]

 10 Tape Forming Section 11 First Roller 12 Second Roller 13 Third Roller 14 Fourth Roller 20 Accumulator Device 40 Tension Sensor Device 70 Heating Device

[Procedure amendment]

[Submission date] September 19, 1991

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 6]

[Figure 3]

[Figure 4]

[Figure 7]

[Figure 5]

Claims (14)

[Claims] 1. A shielded wire comprising a harness and a metal foil tape which is wound in the longitudinal direction of the harness in parallel with the harness. 2. The shielded wire according to claim 1, wherein the metal foil is a copper foil or an aluminum foil. 3. A metal foil tape is brought into contact with the groove portions of a plurality of grooved rollers, a harness is placed on the tape, and the harness and the tape are run in the same direction. And the tape makes an angle of 1 ° to the roller side before and after the plurality of roller contact points.
A method for producing a shield wire by winding a metal foil tape around the longitudinal direction of a harness, which is set to be slightly smaller than 80 °. 4. A box body is provided in the vicinity of the plurality of rollers, and an opening facing the tape running along the rollers is formed in the box body to supply heated air into the box body. The method according to claim 3, further comprising heating the tape on the roller portion. 5. An accumulator device is provided on the supply side of the tape, the tape is stored in the accumulator when the remaining amount of the bobbin of the supply tape becomes small, and the tape is connected to a new bobbin while supplying the storage tape. The method according to claim 3 or 4, wherein 6. A plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and an angle formed by the tape on the roller side is slightly smaller than 180 ° before and after the plurality of grooved rollers. An apparatus for manufacturing a shielded wire by winding a metal foil tape in a longitudinal direction of a harness, which is provided with a tension control device for maintaining the tension of the tape at a predetermined value. 7. A plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and an angle formed by the tape on the roller side is slightly smaller than 180 ° before and after the plurality of grooved rollers. And a tension control device for maintaining the tension of the tape at a predetermined value, and an accumulator device on the supply side of the tape. A device that winds tape and manufactures shielded wire. 8. A plurality of guide rollers provided with the accumulator device at a fixed position, movable guide rollers provided between the guide rollers so as to be movable up and down, and a supply bobbin side from the guide rollers. 8. An apparatus according to claim 7, further comprising a device for holding the tape end when the remaining tape supply bobbin runs out. 9. A plurality of grooved rollers are arranged in the running direction of the harness and the metal foil tape, and an angle formed by the tape on the roller side is slightly smaller than 180 ° before and after the plurality of grooved rollers. The box body is provided in the vicinity of the plurality of grooved rollers,
The box body is provided with an opening so as to face the tape running along the rollers, and heating air for heating the tape running on the grooved rollers can be supplied to the box body, and the tension of the tape is set to a predetermined value. An apparatus for manufacturing a shield wire by winding a metal foil tape around a longitudinal direction of a harness, which is provided with a tension control device for maintaining a value. 10. The apparatus according to claim 6, wherein the grooves formed in the plurality of rollers are sequentially closed as seen in the running direction of the tape. 11. The apparatus according to claim 6, wherein among the plurality of rollers, the roller located at the most downstream side when viewed in the running direction of the tape is stationary. 12. The apparatus according to claim 11, wherein a roller for pressing the tape fed from the roller is provided downstream of the roller located at the most downstream side. 13. A tension detecting arm, wherein the tension control device includes a rotating shaft rotatably supported by a bearing case, a tension connecting arm connected to one end of the rotating shaft, and a roller at a tip end thereof that comes into contact with a running tape. 13. The apparatus according to claim 6, further comprising a sensor arm which is connected to the other end of the rotation shaft and swings as the tension detecting arm moves to operate the sensor. 14. The apparatus according to claim 6, further comprising a device for detecting the edge of the tape supplied from the bobbin, and a device for moving the tape supply bobbin in the axial direction of the bobbin based on a signal from the detection device. The described device.