JP2539645B2 - Cable unwinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Use) The present invention relates to twisting of a quad in a subunit and twisting of a core in a quad when automatically connecting a connector to a core of a communication cable by a machine. The present invention relates to a cable unwinding device for returning a cable.

(Problems to be Solved by Prior Art and Invention) FIG. 2 shows a typical structure of a communication cable currently in use. As shown in this figure, the small-diameter core wires W are blue, yellow,
Insulated by polyethylene colored in eight colors of green, red, purple, white, brown, and black, four sets of core wires W of these eight colors are twisted together to form a quad Q. In the quad Q configuration, the core wires W colored in blue, yellow, green, red, and purple are # 1 to #.
Each quad Q of 5 is twisted one by one, and is used for identification between quads of each quad Q. In each quad Q, the black and brown core wires W form a pair, the other two core wires W form another pair, and one quad consists of two pairs. 5
Subunit U _sub is constructed by further twisting the pair of quads. Furthermore, twist 10 sub-units U _sub
100 pairs of units U are hierarchized in order, and each sub-unit U _sub and unit U are wound with color-coded rough winding tapes, and all the core wires W can be individually identified. P _w is the twist pitch of the core wire W in the quad Q,
p _c is the twist pitch of the quad Q in the subunit U _sub .

When connecting a connector to each core wire W which constitutes the subunit _Usub of such a communication cable, there is no proposal for a device for automating the untwisting work. Conventionally, it rotated at you bunch cutting edge side of the operator first subunit U _sub untwisting quad Q in subunit U _sub and then 1 is rotated at you bunch cut by one cutting edge side quad Q The twist of the core wire W was returned. In the above method, after untwisting the quads Q in the subunit U _sub , untwisting the core wires W in the quads Q for a plurality of quads Q is performed one after another, which results in a long working time. There was a drawback that it caused

(Object of the Invention) An object of the present invention is to provide a cable unwinding device capable of mechanically and untwisting a quad in a subunit and unwinding a core wire in the quad.

(Means for Solving Problems) The present invention has been proposed for achieving the above-mentioned object, wherein a plurality of core wires are twisted into a quad, and a plurality of quads are twisted into a subunit. In a cable untwisting device for untwisting a communication cable or the like, a pushing jig is provided at one end of a base and a bearing portion is provided at the other end, and an arm rotation motor and a sun gear rotation motor are provided at the bearing portion. An arm that is rotated by the arm rotation motor is provided, the sun gear is rotatably supported by the sun gear rotation motor disposed at the same center as the rotation center of the arm, and the sun gear is rotatably supported by the side surface of the arm, and A cable untwisting device is characterized in that a plurality of planetary gears that mesh with a sun gear are provided, and the planetary gears are provided with seats for holding a core wire.

Embodiments of the present invention will be described below with reference to the drawings. Needless to say, the embodiment is merely an example, and various modifications and improvements can be made without departing from the spirit of the present invention.

1 (a), (b) and (c) are diagrams showing an embodiment of the present invention, wherein FIG. 1 (a) is a side view and FIG. 1 (b) is A in FIG. 1 (a). -A arrow view, the same figure (c) is a BB arrow view of the same figure (a). In the figure, 1 is a subunit U
a base having a length l required to restore twist _sub, mounting arm rotation motor 3 and the sun gear rotating motor 4 on the other end provided with押治device 2 for holding the subunit U _sub at one end Mounting bases 1a and 1b to be placed are provided on the side of the bearing portion 1c.
A gear 5 is fitted to the shaft of the arm rotation motor 3 and is provided so as to mesh with an arm gear 6 having the role of an arm pivotally supported by the bearing portion 1c. A sun gear 7 is pivotally supported on the shaft of the gear rotation motor 4, and a plurality of planetary gears 8 to 12 meshing with the sun gear 7 are pivotally supported on the side surface of the arm gear 6 at substantially equal intervals. Further, seats 13 to 17 having a surface parallel to the central axes of the planetary gears 8 to 12 and holding the core W of one quad Q are provided. Also, seats 13-17
Are fixed to the planetary gears 8 to 12, respectively. The arm gear 6 that serves as the arm may be belt-driven by using a belt wheel that serves as the arm.

 Next, the operation of the cable unwinding device will be described.

The twisting direction of the quad Q in the subunit U _sub and the twisting direction of the core wire W in the quad Q are both counterclockwise.
In order to operate this, first, the subunit U _sub is fixed by the pressing jig 2 at a position separated from the cut end by the length l.
Next, the core wire W on the cut end side of the subunit U _sub is quad Q
Each of the seats 13, 14, 15, 16, 17 is fixed to a surface having a large radius of curvature by a band or the like (not shown).

After setting in this way, first, a case where the arm rotation motor 3 and the sun gear rotation motor 4 are driven will be described. Hereinafter, the direction of rotation is determined from the direction of A in FIG. 1, and the counterclockwise direction is positive. If the number of teeth of the gear 5 is n _a and the number of teeth of the arm gear 6 is n _c when the arm rotation motor 3 is rotated clockwise at a rotation speed r _a , the arm gear 6 rotates counterclockwise, The rotation speed r _c is r _c = r _a · n _a / n _c (1). As a result, the twist of the quad Q in the subunit U _sub can be returned as much as necessary. Accordingly, the number of teeth n _w
Planet gears 8 to 12 mesh with the sun gear 7 having the number of teeth n _b and rotate counterclockwise, and the number of rotations r _w1 is r _w1 = r _c + r _c · n _b / n _w = r _a · n _a / n _c (1 + n _b / n _w ) (2) On the other hand, when the sun gear rotation motor 4 is rotated counterclockwise at the rotation speed r _b , the sun gear 7 also rotates at the rotation speed r _b , and the planetary gears 8 to 12 rotate clockwise accordingly. However, the rotation speed r _w2 is r _w2 = −r _b · n _b / n _w (3). Therefore, the combined rotational speed r _w of the planetary gears 8 to 12 is the sum of equations (2) and (3), and r _w2 = r _w1 + r _w2 = r _a · n _a / n _c (1 + n _b / n _w ) −r _b · n _b / n _w (4) Now, the ratio of the rotational speed r _b of the rotational speed r _a sun gear rotating motor 4 arms rotating motor 3 Then, the combined rotation speed r _w becomes 0 from the equation (4). Therefore, only the twist between the quads Q in the subunit U _sub can be restored without changing the twist of the core wire W in the quad Q.

Next, a case where the sun gear rotation motor 4 is driven while the arm rotation motor 3 is stopped will be described. That is, since the arm rotation motor 3 is stopped, the arm gear 6 having the role of an arm is also stopped via the gear 5. Therefore, the planetary gears 8 to 12 attached to the arm gear 6 which is an arm are in the same position and do not move. On the other hand, the sun gear rotating motor 4 is driven to rotate the sun gear 7 clockwise. As a result, the planetary gears 8 to 12 simultaneously rotate counterclockwise. Thus, the planet gears 8-12 are in the same position and rotate counterclockwise. Since the seats 13 to 17 are integrated with the planetary gears 8 to 12, respectively, the core W group fixed to the seats 13 to 17 for each quad Q also rotates counterclockwise.
Only the twist of the core wire W in the quad Q can be returned without changing the mutual twist state of the quad Q in the subunit U _sub . Untwisting speed r _w of the core wire W in the quad Q
Is a sun gear rotation motor 4 to which a sun gear 7 is attached.
It is related to r _w = r _b · n _b / n _w (6) by the rotation speed of −r _b .

Further, when the arm rotation motor 3 and the sun gear rotation motor 4 are driven, the rotation speed r _b of the arm rotation motor 3 is calculated by the equation (1) so that r _c becomes equal to the number of twists of the quad Q. If the rotation number r _b of the sun gear rotation motor 4 is determined by the equation (4) so that r _w is equal to the number of twists of the core wires W, the twist of the quad Q and the mutual twist of the core wires W can be determined. The twist can be returned at the same time.

Next, a structure in which the sun gear rotating motor 4 is removed and the sun gear 7 is not rotated will be described.

When the arm rotation motor 3 is rotated by −r _a and the sun gear rotation motor 4 is not present, the rotation speed r _c for returning the twist of the quad Q is given by the equation (1), and the twist of the core wires W is twisted. The rotation speed r _w that returns is given as r _w = r _a · n _a / n _c (1 + n _b / n _w ) (7) by setting r _b = 0 in the equation (4).

Here, if the twist pitch of the quad Q in the subunit U _sub is p _c and the twist pitch of the core wire W in the quad Q is p _w ,
The ratio of the rotational speeds r _c and r _w required to restore each twist is r _c / r _w = p _w / p _c (8). Therefore, the planetary gear 8 is adjusted so that the ratio of r _c in equation (1) to r _{w in} equation (7) becomes p _w / p _c and satisfies equation (8).
It may be set the ratio n _b / n _w number of teeth 12 teeth and the sun gear. That is, If the gears are selected so that, the twists of the quads Q and the twists of the core wires W can be simultaneously returned only by driving the arm rotation motor 3.

(Effect of the invention) As described above, the present invention is a cable untwisting device for untwisting a plurality of core wires to form a quad, and further twisting a plurality of quads into a subunit to restore the twist of a communication cable or the like, A pushing jig is provided at one end of the base, and a bearing portion is provided at the other end. An arm rotation motor and a sun gear rotation motor are arranged on the bearing portion, and an arm that is rotationally driven by the arm rotation motor is provided. A plurality of planetary gears are provided that support a sun gear on a sun gear rotation motor arranged at the same center as the rotation center of the arm, and are supported on the side surface of the arm and mesh with the sun gear. By providing the gear with a seat that holds the core wire, it is possible to untwist the quad in the subunit and untwist the core wire in the quad at the same time by a machine, enabling automation and speeding up. Has the advantage .

[Brief description of drawings]

1 (a), (b) and (c) are views showing an embodiment of the present invention. FIG. 1 (a) is a side view and FIG. 1 (b) is A- in FIG. 1 (a). A view from the arrow A, FIG. 7C is B- in FIG.
FIG. 2 is a view showing the structure of a typical communication cable as viewed from the direction of arrow B. 1 ...... Base 1c ...... Bearing part 2 ...... Pushing jig 3 ...... Arm rotation motor 4 ...... Sun gear rotation motor 5 ...... Gear 6 ...... Arm gear 7 ...... Sun gear 8,9,10 , 11,12 …… Planetary gear 13,14,15,16,17 …… Seat

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takenori Mitsumitsu 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Informer Naoyuki Nimiya 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nippon Telegraph and Telephone Corporation (72) Inventor Hideo Uematsu 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Yuzo Tsuchiya 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation

Claims (2)

(57) [Claims] 1. A cable untwisting device for untwisting a communication cable or the like, in which a plurality of core wires are twisted together to form a quad, and a plurality of quads are twisted together to form a subunit.
A pushing jig is provided at one end of the base, and a bearing portion is provided at the other end. An arm rotation motor and a sun gear rotation motor are arranged on the bearing portion, and an arm that is rotationally driven by the arm rotation motor is provided. A plurality of planetary gears are provided that support a sun gear on a sun gear rotation motor arranged at the same center as the rotation center of the arm, and are supported on the side surface of the arm and mesh with the sun gear. A cable unwinding device characterized in that a seat for holding the core wire is provided on the gear. 2. The ratio n _b / n _{w of the} number of teeth n _{b of the} sun gear and the number of teeth n _w of the planetary gear, the twist pitch p _c of the quad in the subunit and the twist pitch p _w of the core wire in the quad. Claim 1 characterized in that the relationship with the ratio p _c / p _w with is given by the following equation n _b / n _w ≈p _c / p _w -1.
The cable untwisting device according to the item.