JPH0451923B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for reversing a batten in an alternating reversal winding device, and more specifically, a method for reversing a batten in an alternating reversal winding device. This invention relates to a method for reversing the battens in an alternating reversal winding device, which winds the yarn while reversing the twist, and also applies tape winding to prevent untwisting.

[Prior art] For the purpose of electrical shielding, shield wires such as copper wires, copper alloy wires, and aluminum alloy wires are alternately twisted and twisted on the circumferential surface of the outer semiconductive layer of the cable core.
A wire body that is wrapped in a twisted or Z-twist, or wrapped in an S-twist or Z-twist while alternately twisting armored metal wires such as iron wire or steel wire on the circumferential surface of a cable sheath for the purpose of mechanical protection. The winding device wraps a presser tape immediately after winding in order to prevent untwisting.

Next, a conventional alternating reversal winding device having a presser tape winding device for preventing untwisting will be explained with reference to FIG.

That is, this conventional winding device is composed of a filament winding part and a tape winding part, and the filament winding part has a cable passage hole 3a in the center and a plurality of wire winding parts on a concentric circle. A hollow inverted batten 3 having a filament guide hole 3b formed therein, a fixed support base 5 that rotatably supports the inverted batten plate 3 via a bearing 4 such as a bearing, and this fixed support base 5. and a drive source 6 for reversing the reversing batten for alternately reversing the reversing batten 3 in forward and reverse directions, and the tape winding section is disposed downstream of the filament winding section. A tape rotating body 8 is provided, and has a cable passing hole 8a at the center thereof, a holding tape 9 is rotatably attached to this tape rotating body 8, and the tape rotating body 8 is mounted on a bearing 10 such as a bearing. Therefore, it is composed of a fixed holding table 11 that supports the tape rotatably, and a rotating body drive source 12 that is wound around the fixed holding table 11 and rotates the tape rotary body 8 in one direction.

The above-mentioned reversing eye plate 3 has a rotation support part 3c made of a short cylindrical body with a relatively thick wall, a cable holding part 3d integrally extending from the rotation support part 3c in a cone shape toward the cable traveling direction, and an opposite side of this holding part 3d. It is formed with a ratchet wheel 3e provided in the shape of a flange on the circumferential surface of the short cylindrical body, and the linear body guide hole 3b is parallel to the cable passage hole 3a in the thick rotation support part 3c. A plurality of holes are drilled at equal intervals on the same circumference. Further, the opening at the tip of the cable holding portion 3d allows the cable 2 drawn inside to be connected to the reversing eye plate 3.
A cable holding die 3f is formed to hold the filament (hereinafter referred to as shield wire) 1 on the central axis of the cable 2 and to bring the filament (hereinafter referred to as shield wire) 1 into close contact with the surface of the cable 2.

The rotation support part 3c of the reversing eye plate 3 formed in this way is rotatably attached to the fixed support base 5 by a bearing 4, and the output shaft of the drive source 6 is connected to the ratchet wheel 3e via a chain 7. has been done. The drive source 6 is composed of a reversible motor or the like, and a ratchet wheel 6a fixed to its output shaft and the ratchet wheel 3e are connected by a chain 7. This connecting means may be connected by a V belt, a timing belt, etc.
In this case, the ratchet wheels 3e and 6a are formed of pulleys or gears.

On the other hand, the tape rotating body 8 is constituted by a short cylindrical body integrally formed with a large diameter flange 8b at the front end facing the reversing eye plate 3 and a pulley 8c at the rear end. A holding arm 8d that detachably holds the tape reel 13 is provided on a part of the outer peripheral edge of the tape reel 8b. A tape reel 13 is rotatably attached to this holding arm 8d.
The presser tape 9 wound around the cable holding die 3f is pulled out toward the side of the cable holding die 3f, and
It is designed to wind the cable around which the shield wire 1 is wound, which comes out from f. Further, the pulley 8c is connected by a V-belt 14 to a small-diameter pulley 12a fixed to the output shaft of the rotary body drive source 12 constituted by a motor.

In the winding device configured in this way, the cable 2 is inserted into the cable passing hole 3 of the inverted batten 3.
When the shield wire 1 is pulled through the wire a and moves in the direction of the arrow while being guided by the cable holding die 3f, the shield wire 1 guided through the filament guide hole 3b is rotated in the normal and reverse directions of the batten 3, causing the cable to It is wound in the S and Z turns on the surface of No. 2. That is,
Since the reversing eye plate 3 alternately rotates forward and reversely by the reversing drive source 6, as a result, the cable 2
A plurality of shield wires 1 are wound around the surface in an S-twist and a Z-twist. Then, the wound shield wire 1 is wrapped so that it does not unravel.
Immediately after the SZ shield wire is wound, the surface of the cable is pressed and wound with a holding tape 9 by rotation of the tape rotating body 8 of the holding tape winding device.

Although not shown in the figure, the cable 2 and shield wire 1 are taken up by a cable pulling machine on the downstream side, and as a result, the cable 2 and shield wire 1 are pulled out at a constant rate in the direction of the arrow in the figure. It is progressing at a fast pace.

[Problems to be Solved by the Invention] Incidentally, in the conventional winding device configured as described above, as shown in _FIG. Since the angular acceleration time t ₂ for shifting from normal rotation to reverse rotation is set to be equal to t 2 , the following problem occurs. That is, in FIG. 3, the tape reel 1 of the presser tape winding device is now
3 is rotated clockwise as seen from the upstream side of the cable by the drive of the tape rotating body 8 by the rotary drive source 12, then the reversing eye plate 3 is rotated clockwise when seen from the upstream side of the cable (as seen from the tape winding device). However, if it were to rotate in the opposite direction (when the batten rotates in the opposite direction to the tape winding direction), the shield wire 1 wound on the cable surface would be pressed and wound. The shield wire 1 is rotated in the opposite direction to the tape 9, and at the same time as the reverse rotation starts, the shield wire 1 is pressed and wound and fixed to the cable surface. Therefore, the helical angle θ ₁ of the shield wire 1 to the cable becomes relatively large. Conversely, when the reversing eye plate 3, which was rotating counterclockwise when viewed from the upstream side of the cable, is reversed clockwise in the same direction as the presser winding tape, the shield wire 1 is caught up from the presser winding tape. As a result, the fixation of the shield wire 1 to the cable surface by the tape 9 is delayed, and as a result, the helical angle θ ₂ of the shield wire 1 to the cable 2 becomes relatively small.

Therefore, the angular acceleration time for forward and reverse rotation of the reversal eye plate 3 is t ₁
= _t2 , the helical angles of the shield wire 1 wound around the cable surface are no longer equal, causing pitch disturbance of the shield wire and deteriorating the bending performance of the cable.

Therefore, an object of the present invention is to provide a method for reversing the batten in an alternating reversal winding device, which controls the batten so that the helical angle of the filament wound around the cable surface is the same in both forward and reverse rotations. It is on offer.

[Means and effects for solving the problems] The batten reversal method according to the present invention has an angular acceleration time t ₁ for transitioning from reverse rotation to forward rotation of the reverse batten board and an angular acceleration time t ₂ for transition from normal rotation to reverse rotation of the reverse batten board. If the tape winding direction of the presser tape is set to be the forward rotation direction of the reversing batten plate, then set this to t ₁ < t ₂ and the helical angle of the filament body during forward and reverse rotation with respect to the cable. This is to make θ ₁ and θ ₂ equal.

[Example] The present invention will be described below with reference to an illustrated example. FIG. 1 is a sectional view of an alternately reversing winding device to which the present invention is applied. Since the configuration of this winding device is similar to the conventional one shown in FIG. In the winding device to which this is applied, the reversing eye plate 3 is driven by the driving source 6 as shown in the reversing angular velocity diagram shown in FIG.
It is designed to be driven in reverse.

That is, the time t ₁ for the reversing eye plate 3 to change from reverse rotation (counterclockwise) to forward rotation (clockwise) is set shorter than the time t ₂ for the reversal eye plate 3 to change from forward rotation (clockwise) to reverse rotation (counterclockwise). be. Shield wire 1 is inverted batten 3
By rotating forward and reverse, the cable 2 is wound around the cable holding die 3f in S and Z turns on the surface of the cable 2. Then, the wound shield wire 1 is pressed and wound with a pressing tape 9 so as not to unravel.

Now, assuming that the tape reel 13 of the presser tape winding device is being rotated clockwise by the drive source 12 when looking at the upstream direction of the cable traveling direction, the reversing eye plate 3 changes from normal rotation (clockwise rotation) to reverse rotation ( (counterclockwise rotation), the winding direction of the presser tape 9 and the shield wire 1 are rotated in opposite directions, and the shield wire 1 wound around the surface of the cable 2 by the presser tape 9 is fixed at the same time as the reversal starts. . On the other hand, when the reverse eye plate 3 is reversed from reverse rotation (counterclockwise rotation) to forward rotation (clockwise rotation), the winding direction of the presser tape 9 and the shield wire 1 rotate in the same direction, and the presser tape 9 rotates the shield wire 1 in the same direction. The shield wire 1 fixed to the cable surface is fixed after a slight delay from the start of the reversal.

Therefore, as shown in FIG. 4, if the time t ₁ for the reversing eye plate 3 to change from reverse rotation to normal rotation is shortened, the helical angle θ ₂ on the cable of the shield wire 1 increases, but due to the hold-down tape 9 Since there is a slight delay in fixing the shield wire 1 onto the cable 2, the helical angle θ ₂ ' at which the shield wire is actually wound and fixed onto the cable is slightly smaller than the theoretical value θ ₂ . On the other hand, if the time t ₂ during which the reversing eye plate 3 changes from normal rotation to reverse rotation is lengthened, the helical angle θ ₁ of the shield wire on the cable becomes smaller. In this case, since the shield wire is fixed on the cable by the holding tape 9 at the same time as the reversal, the helical angle θ ₁ ' at which the shield wire is actually wound and fixed on the cable is the theoretical value θ ₁
By choosing an appropriate value of t ₂ /t ₁ larger than 1, the helical angles θ ₁ ′ and θ ₂ ′ of the shield wire actually wound around the cable can be made equal. Can be done. When θ ₁ ′ and θ ₂ ′ are equal, when the cable is bent, the shield wire will not be disturbed, the bending characteristics of the cable will be improved, and the shielding characteristics of the cable will also be improved.

In the above embodiment, the method of the present invention was applied to a winding device that wraps shield wire or armored metal wire around a cable while alternately twisting the cable core in reverse twists. Of course, it can also be applied to twisting.

[Effects of the Invention] As described above, according to the present invention, the conventional drawbacks are solved and: 1. The winding pattern of the shield wire becomes symmetrically regular in both the S twist direction and the Z twist direction.

2. Therefore, the bending characteristics and shielding characteristics of the cable are improved by the above 1).

3. Since the intervals between reverse twists of the shield wire on the cable are almost equal, the cable is not locally pushed by the shield wire, which prevents damage to the cable and improves the electrical characteristics such as withstand voltage of the cable. .

The following remarkable effects are exhibited.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an alternating reversal winding device to which the batten reversal method of the present invention is applied, and FIG. 2 is a sectional view of the above-mentioned first
A diagram showing the reversal angular velocity of the reversing batten in the winding device shown in the figure, FIG. 3 is a sectional view of the alternately reversing winding device to which the conventional batten reversing method is applied, and FIG.
FIG. 4 is a diagram showing the reversal angular velocity of the reversal batten in the winding device shown in FIG. 3; DESCRIPTION OF SYMBOLS 1...Striatal body (shield wire), 2...Cable, 3...Reversed batten, 3a...Cable passage hole, 3b...Striated body guide hole, 9...Pressure tape.

Claims (1)

[Claims] 1. A reversible eye plate having a cable passage hole in the center and a plurality of filament guide holes concentrically drilled therein is alternately reversed in forward and reverse rotation, and is inserted into the passage hole. In an alternate reversal winding device that winds the filament guided by the guide hole around the cable that has been pulled through in an S twist and a Z twist, and immediately thereafter wraps a holding tape to prevent untwisting, the holding tape is used. With the tape winding direction of the winding device set in the forward rotation direction of the reversing eye plate, the angular acceleration time of the reversing eye plate from reverse to normal rotation is t ₁ , and the angular acceleration time of changing from normal rotation to reverse rotation of the reversing eye plate is t ₂ , the helical angles of the filament with respect to the cable during forward and reverse rotation θ ₁ , θ ₂
A batten reversal method characterized in that the above-mentioned time is set to t ₁ < t ₂ in order to equalize.