JPH0436006Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In self-supporting communication cables commonly used as conventional CCP cables, such as Daruma type cables, slack is added to the core wires in advance, and branch connections are made midway after the overhead wires are connected. When doing so, the desired core wire can be easily removed by simply tearing off the sheath.
Communication cables are known that allow easy wiring within a terminal box.

In an apparatus for manufacturing this communication cable with slack, a torsion catcher is used which holds a running core between two belts and twists the running core.

The present invention relates to a torsion catcher used in a communication cable manufacturing device with slack.

[Prior Art] FIG. 4 is an explanatory diagram showing a schematic configuration of a conventional apparatus for manufacturing a communication cable with slack.

This device consists of 20 subunits.
This is a CCP cable manufacturing device, with each subunit consisting of five insulated core wires, or 10 pairs of insulated core wires. That is, this device is for 200 pairs of slack CCP cables. Moreover, with this device,
This not only adds slack to the core wires, but also imparts oscillating twist to each cut core wire and subunit.

This device includes two oscillating twisting means 140.
Each of the curled oscillating twisting means 140 has a fiber gathering batten 102 through which the five curled core wires 101 pass and is rotated alternately left and right by a motor not shown in the figure, and this batten. It has a wire twisting die 103 that collects the cut wires 101 that have passed through to form a subunit 104. Although not shown in the figure, colored tape winding means is further provided, and tapes of different colors are wound for each subunit. This tape fixes the torsion of the core wires imparted by the swing twisting means 140, and
It is used to distinguish between subunits in communication cables after installation.

The two subunits 104 are further passed through a subunit aggregation plate 105. Two subunit rocking twisting means 141 are arranged in front of the subunit assembly batten 105. Each subunit swing twisting means 141 has a pinch roller 106 that is rotated alternately left and right by a motor (not shown). Each pinch roller 106
The subunits 104 are allowed to pass through the subunit aggregation battens 105 while restraining their torsion. Two subunits 104 twisted by each subunit rocking twisting means 141
are assembled by a subunit twisting die 107 to form a one-layer core 110.

In front of the subunit twist die 107,
A rough tape winding means 108 and a twisting means 109 having a torsion carrier inside are arranged. The tape is roughly wound by the tape rough winding means 108, and the twisting means 1 is equipped with a torsion catcher inside.
Single-layer core 110 twisted by 09
is further passed through the center of the subunit aggregation plate 111. Subunit gathering plate 111
In addition to the one-layer core 110, six subunits 115 are supplied. Each subunit 115
Similar to the swinging twisting means 140, the wire assembly battens 113 and the wire twisting die 11 are rotated alternately left and right by a motor not shown in the figure.
The five bent core wires 112 are oscillatedly twisted by the oscillating twisting means 142 having 4, and then assembled to form each.

In front of the subunit assembly batten 111, six subunit swing twisting means 143 are arranged.
Each subunit swing twisting means 143 has a pinch roller 116 that is rotated alternately left and right by a motor (not shown). Each pinch roller 116 allows the subunits 115 to pass through the subunit aggregation plate 111 while restraining twisting thereof. Each subunit oscillating twisting means 1
The six subunits 115 twisted by the subunit twisting die 117 are gathered around the outer periphery of the single layer core 110, and the two
A layer core 120 is constructed.

In front of the subunit twisting die 117,
A tape rough winding means 118 and a twisting means 119 are arranged. The two-layer core 120 is roughly wound with a tape by the tape rough winding means 118 and twisted by the twisting means 119 equipped with a torsion catcher inside.
is passed through the center of the In addition to the two-layer core 120, 12 subunits 125 are supplied to the subunit assembly batten 121. Each sub-unit 125 includes a fiber gathering plate 123 and a fiber twisting die which are alternately rotated left and right by a motor (not shown in the figure), similar to the first half swinging twisting means 140 and the first half swinging twisting means 142. 124
By the cupped oscillating twisting means 144 having
Each of the five cutlet core wires 122 is formed by swinging and twisting them and then gathering them together.

Twelve subunit rocking twisting means 145 are arranged in front of the subunit assembly batten 121.
Each subunit swing twisting means 145 has a pinch roller 126 that is rotated alternately left and right by a motor (not shown). Each pinch roller 126 passes through the subunit aggregation plate 121 and passes through the subunit 125 while restraining twisting thereof. Each subunit oscillating twisting means 1
The 12 subunits 125 twisted by the subunit twisting die 127 are gathered around the outer circumference of the two-layer core 120, and
A layer core 130 is constructed.

In front of the subunit twist die 127,
A tape rough winding means 128 and a twisting means 129 are arranged. A tape is roughly wound by a tape winding means 128, and a three-layer core 130 is twisted by a torsion means 129 equipped with a torsion catcher. After that, it is wound up by a rotary winding machine 132 equipped with a winding bobbin inside to form a slack CCP cable whose sectional view is shown in FIG.

1 in the center consisting of two subunits 104
Six subunits 115 are arranged around the outer periphery of the layer core 110.
are arranged to form a two-layer core 120, and twelve subunits 125 are arranged around the outer periphery of this two-layer core 120 to form a three-layer core 130. Therefore, the cable has a total of 20 subunits, each subunit consisting of 5 twisted cores, so that the cable has 200 pairs of slack insulated cores. In addition, since each cutter core wire and each subunit are individually subjected to oscillating twist, the core wires do not become parallel to each other, and crosstalk does not occur between adjacent lines. Incidentally, paired core wires were sometimes used instead of each of the cut core wires 101, 112, and 122.

Next, the process of adding slack to the core wire will be explained using the three-layer core 130 as an example.

When the torsion means 129 is rotated in the circumferential direction of the three-layer core 130 at a rotational speed N ₁ and the core is continuously wound at a speed V by the rotary winder 132, the three-layer core 130 has the following properties: Between the subunit twisting die 127 and the twisting means 129, a right-handed twist (or left-handed twist) with a pitch of P ₁ is provided.
The tape rough winding means 128 roughly winds the tape around the three-layer core 130 with a twist pitch of _P1 in a direction opposite to the twist direction at a pitch p. Twisting means 129
The three-layer core 130 that has passed through the twisting means 12 rotates the rotation direction of the rotary winder 132.
9, and the twisting means 12.
The rotation speed N ₂ of the rotary winding machine 132 is appropriately reduced relative to the rotation speed N ₁ of the twisting means ₁₂₉ , or the rotation speed N ₂ of the rotary winding machine 132 is set to 0 (stopping the rotary winder 132), and is wound onto the winding bobbin of the rotary winder 132.
Thereby, the three-layer core 130
At the position where it exits 9, it is twisted back with pitch P ₂ . however,
Winding onto the rotary winding machine 132 is performed after the three-layer core 130 of pitch P' ₂ thus twisted is wound with a tape by the tape winding means 131 and fixed. Through the above operations, a communication cable with slack can be obtained.

The slackening process described above can be applied to other cable cores, namely the single-layer core 110 and the double-layer core 12.
The same goes for cable core 0. After giving the running core a lump-sum false twist, and then rough winding in the opposite direction to the direction of the false twist, the twist pitch P of the cable core can be changed by untwisting the false twist. ₁ to P' ₂ and shortening the coarse winding pitch p to the coarse winding pitch p' after twisting, a surplus is created in the core length between the coarse windings, and this core is pressed and wound with tape. This causes excess core wire to accumulate.

The torsion catchers used in each of the twisting means 109, 119, and 129 of the communication cable manufacturing apparatus described above were as follows.

That is, the first layer core 110 and the second layer core 120
In the torsion means 109 and 119 for this purpose, a torsion catcher installed therein has two belts with flat outer surfaces, and these belts sandwich the running core to give it a twist. . Furthermore, in the torsion catcher in the torsion means 129 for the three-layer core 130, endless chains equipped with a large number of urethane materials each having a rectangular cross section are disposed above and below, and these chains sandwich the running core to prevent twisting. I tried to give.

[Problems to be solved by the invention] In the conventional torsion carrier described above, the torsion means 109 and 119 for the first-layer core 110 and the second-layer core 120 are equipped with:
Because two belts with flat outer surfaces were used to shorten the dynamic length and make the device more compact, when the number of subunits is small, the outer diameter of the running core becomes smaller, and the rough tape winding means becomes smaller. 10
In some cases, the roughly wound tape carefully applied by the torsion catcher was cut by the torsion catcher.

[Purpose of the invention] In view of the above points, the present invention has been developed to provide a torsion catcher that clamps a running core between two belts and twists it smoothly. The purpose is to provide something that does not cut off.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a belt extending in a direction perpendicular to the running core on each outer surface of the two belts that sandwich the running core and twisting the running core. It is made up of continuous grooves.

[Function] By providing continuous grooves on both belts, the contact surface between the running core and the belt becomes smaller. Therefore, it is possible to reduce the pressing force on the running core and torsion it easily and smoothly.

[Embodiment] FIG. 1 is a perspective view of a timing belt used in a torsion catcher according to an embodiment of the present invention.

The timing belt 10 includes two belts 12 and 1 for sandwiching the running core and giving it twist.
Consists of 4. The inner surfaces of both belts are provided with a large number of grooves 1 parallel to each other in a direction perpendicular to the core take-up direction 16 so as to mesh with a belt pulley (not shown).
8 and 20 are cut out. On the outer surface of one of the belts 12, a large number of grooves 22 are cut in parallel to each other and inclined with respect to the core take-up direction 16. The outer surface of the other belt 14 is cut with a number of mutually parallel grooves 24 that are inclined in the opposite direction to the grooves 22.

2 and 3 are a plan view and a cross-sectional view, respectively, of a torsion catcher according to an embodiment of the present invention having the timing belt 10 described above.

One of the belts 12 constituting the timing belt 10 is stretched between two belt pulleys 30 whose axes are arranged parallel to each other.
is engaged with the belt wheel 30. This belt 12
In the lower part of the figure, the other belt 14 is similarly stretched around two belt pulleys, and the groove 20 on the inner surface of the belt 14 meshes with these belt pulleys. In addition, in FIG. 3, the belts 12, 14 and the belt wheel 3
0 is omitted.

A shaft 32 is fixed to each belt pulley 30, and rectangular parallelepiped guide pieces 34 are fixed to both ends of this shaft. Side walls 3 are provided on both sides of the belts 12 and 14 in the length direction.
6 are provided parallel to each other, and each guide piece 34 is inserted into a guide hole 38 provided perpendicularly to the axis 32 in each side wall 36 . In each shaft 32, one end of a connecting rod 40 is rotatably connected between the belt pulley 30 and the guide piece 34. The other end of the connecting rod 40 connected to the left shaft 32 of the belt 12 is rotatably supported by a left movable piece 44 on the shaft 42, and the other end of the connecting rod 40 connected to the left shaft 32 of the belt 14 is also the same. It is rotatably supported by a movable piece 44. On the other hand, the other end of the connecting rod 40 connected to the right shaft 32 of the belt 12 is rotatably supported by the right movable piece 44, and the other end of the connecting rod 40 connected to the right shaft 32 of the belt 14 is also rotatably supported by the right movable piece 44. Same movable piece 44
It is rotatably supported.

Screw shafts 46 are rotatably supported by bearings 48 on both sides of the belts 12 and 14 on the inner surfaces of the side walls 36, respectively. The left and right halves of the screw shaft 46 are threaded in opposite directions, and the left and right movable pieces 44 are screwed into each thread. A bevel gear 52 is fixed to the right end of each screw shaft 46. A bevel gear 54 meshing with the gear 52 is fixed to one end of each shaft 56 arranged perpendicularly to each screw shaft 46 . Worm wheels 58 are attached near the other ends of these shafts 56, respectively. Two worms 60 that mesh with these two worm wheels 58, respectively, are attached to one shaft 62 arranged perpendicularly to both shafts 56 having the worm wheels 58. This shaft 62 passes through each side wall 36 and has a square head 64 on both outer sides of the side wall 36.
has.

Both side walls 36 are provided with a rear plate 66 on the right side.
They are connected to each other by a front plate 68 on the left side, and the side plates 36, the rear plate 66, and the front plate 68 form a frame of this torsion catcher. A circular hole is formed in each of the rear plate 66 and the front plate 68, and hollow shafts 70 and 72 are provided that project outward from the position of each circular hole, and these hollow shafts are rotatable by bearings 74, respectively. supported.
Furthermore, a sprocket 76 is attached to the outer periphery of the left hollow shaft 72, and its rotation is driven via a chain 78.

When the shaft 62 is rotated by operating the square head 64, the worm gears 60, 58 and the bevel gears 54, 52 are rotated.
, both screw shafts 46 rotate in the same direction. When the screw shaft 46 rotates, the left and right movable pieces 44 screwed thereto move in opposite directions. Therefore, each shaft 32 moves up and down by the same length via the link mechanism constituted by the connecting rod 42 while the guide piece 34 is guided into the guide hole 38. At this time, the belt pulley 30 attached to the shaft 32
The belts 12 and 14, which are stretched over each other, move parallel to each other, and the interval between these belts changes.

The cable core introduced into this torsion catcher through the right hollow shaft 70 is held between belts 12, 14 whose distance is adjustable, and is led out through the left hollow shaft 72. Ru. Further, the latter hollow shaft 72 is rotated by a drive means (not shown) via a chain 78 and a sprocket 76, and torsion is imparted to the running core. At this time, the belts 12, 14
Since the grooves 22 and 24 are formed on the outer surfaces of the belts 12 and 14, the contact surface between the running core and these belts 12 and 14 is small, and the pressing force on the core can be reduced to easily and smoothly twist the core. Therefore, even if the dynamic length of the torsion catcher is short, the above 1.
Regarding the layer and two-layer core, even though the number of assembled subunits is small, problems such as cutting of the loosely wound tape applied by the rough tape winding means do not occur.

In this embodiment, since the grooves 22 and 24 are inclined in the opposite direction to the core take-up direction 16, the core can be reliably twisted; Any material with grooves formed therein may be used. Furthermore, in this embodiment, the distance between both belts 12 and 14 can be changed simply by operating one square head 64, and a small and lightweight torsion catcher can be realized. , 14 may be moved individually to change the interval between both belts.

[Effects of the invention] In the torsion catcher according to the invention, grooves are formed on the outer surface of the timing belt in a direction transverse to the running core, so the contact surface between the running core and the timing belt is reduced. By reducing the pressing force on the core, it is possible to twist the core easily and smoothly.

Therefore, according to the present invention, it is possible to provide a torsion catcher that does not cut loosely wound tape.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a timing belt used in a torsion catcher according to an embodiment of the present invention, FIG. 2 is a plan view of a torsion catcher according to an embodiment of the present invention, and FIG. is − in the previous figure.
A cross-sectional view, FIG. 4 is an explanatory diagram showing the schematic configuration of a communication cable manufacturing device using a conventional torsion catcher, and FIG. 5 is a CCP cable with slack manufactured by the manufacturing device shown in the previous figure. FIG. Explanation of symbols: 12, 14...Timing belt, 16...Core running direction, 22, 24...Groove.

Claims (1)

[Scope of utility model registration request] A torsion catcher in which a running core is sandwiched between two belts to twist it, characterized in that both belts are provided with grooves extending in a direction perpendicular to the running core on the outer surfaces of both belts. Shion Catcher.