JP3888355B2 - Self-supporting optical cable manufacturing equipment and capstan - Google Patents

Description

  The present invention relates to a self-supporting optical cable manufacturing apparatus and a capstan in which outer peripheries of a suspension wire and an optical fiber cable are collectively covered with a cross-sectional shape gourd sheath, and in particular, replacing a capstan for providing an extra length. The present invention relates to a self-supporting optical cable manufacturing apparatus and a capstan that can manufacture self-supporting optical cables of various sizes.

Conventionally, in a self-supporting optical cable, a hanging wire and an optical fiber cable are covered with a sheath, and the covered hanging wire and the optical fiber cable are integrally formed via a neck portion. When tension is applied to the hanging line by natural phenomena such as tension at the time of laying and stretching of the self-supporting optical cable, and also by natural phenomena such as wind pressure, the hanging line generally extends by about 0.2%. In this case, if the lengths of the suspension line and the optical cable are the same, the optical fiber cable is also stretched by about 0.2% with the extension of the suspension line. As a result, the electrical loss of the self-supporting optical cable increases. It is said that.
Therefore, a self-supporting optical cable with an extra length has been developed so that the optical fiber cable does not extend with the extension of the suspension line (see, for example, Patent Document 1).

  FIG. 10 shows a conventional self-supporting optical cable with extra length. This conventional self-supporting optical cable 50 with extra length includes a suspension line 3 made of a stranded wire of a galvanized steel wire or a zinc aluminum alloy plated steel wire, and a suspension line portion 8 made of a suspension wire sheath 5A covering the outer periphery of the suspension wire 3. , An optical fiber cable portion 9 including an optical fiber cable 2 arranged in parallel with the suspension wire 3 and an optical fiber cable sheath 5B covering the outer periphery of the optical fiber cable 2, and the suspension wire portion 8 and the optical fiber cable portion. 9 and a neck portion 4 that connects 9 to the longitudinal direction. A slit 6 is formed in the neck portion 4, and a meandering portion 7 is formed in the optical fiber cable portion 9 at the slit 6 portion to give a surplus length. This extra length ratio is set so that the length of the optical fiber cable portion 9 is generally about 0.2% longer than the length of the hanging portion 8.

  FIG. 11 shows a conventional self-supporting type optical cable manufacturing apparatus with extra length. This conventional self-supporting optical cable manufacturing apparatus 60 with extra length includes a hanging drum 61 for feeding the wound suspension wire 3, an optical fiber cable drum 62 for feeding the wound optical fiber cable 2, and the suspension wire 3 and the optical fiber cable. 2, an extruder 63 for covering the sheaths 5A and 5B around the outer periphery of the cable 2, and a capstan for wrapping the sheaths 5A and 5B coated on the outer periphery of the suspension wire 3 and the optical fiber cable 2, 64, a longitudinal roll 64A for preventing the sheaths 5A, 5B and the neck 4 wound around the capstan 64 from coming into contact with the other sheaths 5A, 5B and the neck 4 when the capstan 64 almost goes around the capstan 64, and an extra length Guide rolls 64B and 64C for correcting the traveling direction of the self-supporting optical cable 50 to which the And a water tank 65 that cools the self-supporting optical cable 50 provided with the extra length, a take-off machine 66 that takes the self-supporting optical cable 50, and a winder that takes up the taken self-supporting optical cable 50 (not shown). A winding machine and a winding drum 67 are provided.

  FIG. 12 shows a capstan used in a conventional self-supporting type optical cable manufacturing apparatus with extra length. The capstan 64 is formed by forming a half-shaped groove 64a in a drum-shaped outer peripheral portion 64b.

  A conventional method for manufacturing a self-supporting optical cable with extra length will be described with reference to FIGS. The suspension line 3 drawn from the suspension drum 61 and the optical fiber cable 2 drawn from the optical fiber cable drum 62 are arranged in parallel and sent to the extruder 63. The extruder 63 coats the sheaths 5A and 5B having a gourd-shaped cross section on the outer periphery of the drawn suspension line 3 and the optical fiber cable 2 by the extruder 63 at once. At this time, the extruder 63 pushes the sheaths 5A and 5B together while intermittently providing the slits 6 on the neck portions 4 of the gourd-shaped sheaths 5A and 5B with a slit forming device (not shown).

  The self-supporting optical cable 50 extruded from the extruder 63 is wound around a capstan 64 having a half-shaped groove 64a on the outer periphery, and after cooling the sheaths 5A, 5B and the neck portion 4 while making almost one turn, the self-supporting optical cable 50 In order to prevent contact with the sheaths 5A, 5B and the neck portion 4 at the start of winding, as shown in FIG. 12, the self-supporting optical cable 50 is shifted to the left in the figure by the vertical roll 64A to guide the rolls 64B, 64C. Thus, the traveling direction of the self-supporting optical cable 50 is corrected. Next, it is cooled in the water tank 65, taken up by the take-up machine 66, and taken up on the take-up drum 67.

  Here, the distance from the center of the cross section perpendicular to the length direction of the suspension line portion 8 to the rotation center of the capstan 64 is referred to as the layer center radius of the suspension line portion 8 and is represented by R. The distance from the center of the cross section perpendicular to the length direction of the optical fiber cable portion 9 to the rotation center of the capstan 64 is referred to as the layer center radius of the optical fiber cable portion 9. When the difference between the layer center radius of the optical fiber cable portion 9 and the layer center radius R of the suspension portion 8 is G, the excess length ratio is expressed as G / R (%). Further, the surplus length is caused by the difference between the layer center radii. The larger the difference G between the layer center radii, the larger the surplus length.

  According to the conventional method for manufacturing a self-supporting optical cable, self-supporting optical cables having various extra lengths can be manufactured by changing the radius of curvature of the half-grooved groove 64a formed in the drum-shaped outer peripheral portion 64b. .

Further, according to the conventional method for manufacturing a self-supporting optical cable, the sheath 5A, 5B is cooled around the capstan 64 having the halved groove 64a in the outer peripheral portion 64b, so that the neck portion of the sheath 5A, 5B is cooled. Since the cooling is performed in a state where 4 is corrected, the self-supporting optical cable 50 having the perfectly shaped cross-sectional gourd-shaped sheaths 5A and 5B can be manufactured.
JP-A-8-75969 (FIGS. 1 and 2)

  However, according to the conventional method for manufacturing a self-supporting optical cable, a capstan having a half groove for winding an optical fiber cable portion having a rotation radius larger than the rotation radius of the half groove for winding the hanging portion is used. Therefore, depending on one capstan, only a self-supporting optical cable having one type of extra length ratio can be manufactured. For this reason, in order to manufacture a self-supporting optical cable having different extra length ratios, it was necessary to replace the capstan with half-grooved grooves having different radii of rotation.

  This capstan replacement work is often carried out while ensuring the safety of the work because the weight of the capstan is heavy, and it is often a removal and installation work in a narrow place. Work is necessary. Therefore, delivery time is required and the cost is increased.

  In addition, if a new size self-supporting optical cable is to be manufactured, it is necessary to prepare a new capstan, which further increases the cost.

  Accordingly, an object of the present invention is to provide a self-supporting optical cable manufacturing apparatus and a capstan that can manufacture self-supporting optical cables of various sizes without exchanging the capstan for providing extra length. It is in.

In order to achieve the above object, the present invention provides a self-supporting optical cable manufacturing apparatus of a gourd-shaped cross section in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable and an extra length is given to the optical fiber cable. A first capstan that is rotatably attached to a capstan shaft for a suspension wire, which is wound around a suspension wire portion formed by applying the sheath to the suspension wire, and disposed in parallel with the first capstan, A second capstan rotatably attached to a capstan shaft for an optical fiber cable, wherein the optical fiber cable portion formed by applying the sheath to the fiber cable is wound around a tapered winding outer peripheral surface and pulled ; The first and second capstans are provided with relative movement in the direction of the rotation axis, and the second capstan A capstan moving portion that makes the layer center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface larger by a predetermined ratio than the layer center radius of the suspension portion wound around the first capstan. An apparatus for manufacturing a self-supporting optical cable is provided.

In order to achieve the above object, the present invention provides a self-supporting optical cable manufacturing apparatus of a gourd-shaped cross section in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable and an extra length is given to the optical fiber cable. A first capstan that is rotatably attached to a capstan shaft for a suspension wire, which is wound around a suspension wire portion formed by applying the sheath to the suspension wire, and disposed in parallel with the first capstan, A second capstan in which a plurality of optical fiber cable rollers are provided on the winding outer peripheral surface, and the optical fiber cable portion formed by applying the sheath to the fiber cable is wound around a tapered winding outer peripheral surface; The first capstan and the second capstan are provided with relative movement in the direction of the rotation axis so that the second capstan A capstan moving part that makes the layer center radius of the optical fiber cable part wound around the outer periphery of the wrapping winding larger by a predetermined ratio than the layer center radius of the suspension line part wound around the first capstan. An apparatus for manufacturing a self-supporting optical cable is provided.

In order to achieve the above object, the present invention provides a self-supporting optical cable manufacturing apparatus of a gourd-shaped cross section in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable and an extra length is given to the optical fiber cable. A first capstan provided with a plurality of suspension line rollers that wrap around the suspension line portion formed by applying the sheath to the suspension line, and is disposed in parallel with the first capstan. A second capstan in which a plurality of optical fiber cable rollers are provided on the winding outer peripheral surface, and the optical fiber cable portion formed by applying the sheath to the optical fiber cable is wound around a tapered winding outer peripheral surface. And providing the first and second capstans with a relative movement in the direction of the rotation axis, thereby causing the tapes of the second capstans to move. A capstan moving portion that makes a layer center radius of the optical fiber cable portion wound around the outer periphery of the coil-like winding larger by a predetermined ratio than a layer center radius of the suspension portion wound around the first capstan. An apparatus for manufacturing a self-supporting optical cable is provided.

  It is preferable that the first capstan has a curvature that is the same as or close to the outer diameter of the hanging line part and has a curved surface around which the hanging line part is wound.

In order to achieve the above object, the present invention provides a capstan in which a self-supporting optical cable of a cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable is wound, and the sheath is applied to the suspension line. A first capstan that is rotatably attached to a capstan shaft for a suspension wire, wound around the formed suspension wire portion, and disposed in parallel with the first capstan, and the sheath is applied to the optical fiber cable. A second capstan rotatably mounted on a capstan shaft for an optical fiber cable, and the first and second capstans being wound around a tapered winding outer peripheral surface and being pulled off . The taper-like winding of the second capstan by giving a relative movement in the direction of the rotation axis And a moving part that increases a layer center radius of the optical fiber cable portion wound around a peripheral surface by a predetermined ratio from a layer center radius of the suspension line portion wound around the first capstan. Provide a capstan to do.

In order to achieve the above object, the present invention provides a capstan in which a self-supporting optical cable of a cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable is wound, and the sheath is applied to the suspension line. A first capstan that is rotatably attached to a capstan shaft for a suspension wire, wound around the formed suspension wire portion, and disposed in parallel with the first capstan, and the sheath is applied to the optical fiber cable. A second capstan in which a plurality of optical fiber cable rollers are provided on the wound outer peripheral surface, and the first and second caps are wound around the tapered outer peripheral surface. The outer peripheral surface of the taper-shaped winding of the second capstan by giving the stan a relative movement in the rotation axis direction A capstan comprising: a moving section that makes a core radius of the wound optical fiber cable portion larger by a predetermined ratio than a core radius of the suspension portion wound around the first capstan. I will provide a.

In order to achieve the above object, the present invention provides a capstan in which a self-supporting optical cable of a cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of a suspension line and an optical fiber cable is wound, and the sheath is applied to the suspension line. A first capstan provided with a plurality of suspension line rollers that wrap around the formed suspension line portion and take over the suspension line portion, and is arranged in parallel with the first capstan, and the optical fiber cable includes the A second capstan in which a plurality of optical fiber cable rollers are provided on the wound outer peripheral surface, and the first and first optical fiber cable portions formed by applying a sheath are wound around a tapered wound outer peripheral surface; A relative movement in the direction of the rotation axis is given to the capstan of the second capstan so that the taper-shaped outer circumferential surface of the second capstan A cap having a moving center which makes a layer center radius of the optical fiber cable portion attached to be larger than a layer core radius of the suspension line portion wound around the first capstan by a predetermined ratio. Provide stun.

  It is preferable that the first capstan has a curvature that is the same as or close to the outer diameter of the hanging line part and has a curved surface around which the hanging line part is wound.

  According to the self-supporting optical cable manufacturing apparatus of the present invention, the suspension wire covered with the sheath is wound around the first capstan, the optical fiber covered with the sheath is wound around the second capstan, and the optical fiber cable portion Since the capstan moving part that increases the layer core radius by a predetermined ratio than the layer core radius of the suspension line part is included, self-supporting optical cables of various sizes can be manufactured without replacing the capstan.

  According to the self-supporting optical cable manufacturing apparatus of the present invention, the first capstan has a curved surface having a curvature that is the same as or close to the outer diameter of the suspended wire portion, and the suspended wire portion is wound around the curved surface. Is fixed by the curved surface, so that the self-supporting type optical cable can be manufactured without changing the extra length ratio.

  According to the apparatus for manufacturing a self-supporting optical cable of the present invention, the second capstan has a plurality of rollers arranged on the tapered winding outer peripheral surface along the longitudinal direction of the second capstan. Therefore, it is not necessary to use an expensive bearing for rotating the entire capstan, and the cost can be reduced.

  According to the self-supporting optical cable manufacturing apparatus of the present invention, the first capstan is provided with a plurality of suspension line roller shafts, and the suspension line portions are provided on the plurality of suspension line rollers provided on the plurality of suspension line roller shafts. Since it is bridged, it is not necessary to rotate the entire first capstan, so that it is not necessary to use an expensive bearing and the cost can be reduced.

  According to the capstan of the present invention, the suspension wire covered with the sheath is wound around the first capstan, the optical fiber covered with the sheath is wound around the second capstan, and the layer core radius of the optical fiber cable portion is suspended. Since the capstan moving part that is larger than the layer center radius by a predetermined ratio is included, self-supporting optical cables of various sizes can be manufactured without replacing the capstan.

  According to the capstan of the present invention, the first capstan has a curved surface having a curvature that is the same as or close to the outer diameter of the suspended wire portion, and the suspended wire portion is fixed to the curved surface by winding the suspended wire portion around the curved surface. Therefore, a self-supporting shining cable can be manufactured without changing the extra length ratio.

  According to the capstan of the present invention, the second capstan has a plurality of rollers arranged along the longitudinal direction of the second capstan on the tapered winding outer peripheral surface. There is no need to use an expensive bearing for rotation, and the cost can be reduced.

  According to the capstan of the present invention, the first capstan is provided with a plurality of suspension line roller shafts, and the suspension line portions are bridged to the plurality of suspension line rollers provided on the plurality of suspension line roller shafts. Since it is not necessary to rotate the entire capstan, it is not necessary to use an expensive bearing and the cost can be reduced.

  1 to 3 show a self-supporting optical cable with a surplus length according to a first embodiment of the present invention. FIG. 1 shows a self-supporting optical cable with a surplus length according to the first embodiment of the present invention, FIG. 2 shows a side view of the self-supporting optical cable with a surplus length according to the first embodiment, and FIG. The expanded cross section of the radial direction of the self-supporting type optical cable 1 with extra length concerning a 1st embodiment is shown, respectively.

  The self-supporting optical cable 1 includes, for example, a suspension wire 3 made of a stranded wire of a galvanized steel wire or a zinc aluminum alloy plated steel wire, a suspension wire portion 8 made up of a suspension wire sheath 5A covering the outer periphery of the suspension wire 3, An optical fiber cable portion 9 including an optical fiber cable 2 arranged in parallel and an optical fiber cable sheath 5B covering the outer periphery of the optical fiber cable 2, and the suspension portion 8 and the optical fiber cable portion 9 are connected in the longitudinal direction. And a neck portion 4 connected to the head. A slit 6 is formed in the neck portion 4, and a meandering portion 7 is formed in the optical fiber cable portion 9 at the slit 6 portion to give a predetermined extra length. The sheaths 5A and 5B and the neck 4 are made of polyethylene, for example.

  FIG. 4 shows the self-supporting type optical cable manufacturing apparatus with extra length according to the first embodiment. This self-supporting optical cable manufacturing apparatus 10 has a suspension drum 11 that feeds the wound suspension wire 3, an optical fiber cable drum 12 that feeds the wound optical fiber cable 2, and the outer periphery of both the suspension wire 3 and the optical fiber cable 2. An extruder 13 that covers the sheaths 5A and 5B; a slit forming device 14 that is formed in the extruder crosshead 15 of the extruder 13 and that forms a slit 6 in the neck 4 of the self-supporting optical cable 1; and an optical fiber cable portion 9 A capstan 20 that gives extra length to the capstan, a sheath 5A, 5B wound around the capstan 20 and the capstan 20, and a capstan cooling water tank 16 that cools the neck portion 4, and a sheath 5A, 5B wrapped around the capstan 20. When the neck 4 goes around the capstan 20 once, the other sheath 5A, 5B and the neck 4 A vertical roll 16A for preventing touch, guide rolls 16B and 16C for correcting the traveling direction of the self-supporting optical cable 1 provided with the extra length, and a cooling water tank for cooling the self-supporting optical cable 1 provided with the extra length 17, a take-up machine 18 for taking up the self-supporting optical cable 1 provided with an extra length, a take-up machine (not shown) that takes up the taken-up self-supporting optical cable 1, and a take-up drum 19. The vertical roll 16 </ b> A and the guide rolls 16 </ b> B and 16 </ b> C are attached to the capstan section cooling water tank 16.

  FIG. 5 shows the capstan 20 used in the self-supporting type optical cable manufacturing apparatus with extra length according to the first embodiment. The capstan 20 includes a suspension capstan 21 (a) rotatably attached to a suspension capstan shaft 23 by a suspension capstan bearing 24, and an optical fiber cable by an optical fiber cable capstan bearing 27. And an optical fiber cable capstan 22 (a) attached to the capstan shaft 29 for rotation.

  The suspension capstan 21 (A) is made of aluminum and has a suspension portion abutment groove 21 a against which the suspension portion 8 abuts. Further, the suspension line abutment groove 21 a has a recess 45 on the side of the suspension line capstan shaft 23. The suspension line portion contact groove 21a is a substantially L-shaped groove, has a curvature that is the same as or close to the outer diameter of the suspension line portion 8, and has a curvature radius of 2 to 10 mm.

  The optical fiber cable capstan 22 (A) is made of aluminum and has a flat optical fiber cable portion abutting surface 22 a that abuts the optical fiber cable portion 9 and has a taper of 1/10 to 20/10. . The fiber cable capstan 22 (A) has a protrusion 22b on the optical fiber cable portion abutment surface 22a side, and the protrusion 22b is accommodated in the recess 45 of the suspension capstan 21 (A). Yes.

  The suspension line capstan bearing 24 is waterproof and is fixed to the suspension line capstan shaft 23 by a suspension line capstan retaining ring 25.

  The optical fiber cable capstan bearing 27 is waterproof and is fixed to the optical fiber cable capstan shaft 29 by an optical fiber cable capstan retaining ring 28.

  The capstan shaft 29 for the optical fiber cable is attached so as to be movable in the length direction by converting the rotational motion of the screw shaft 32 connected to the motor 26 into a linear motion. The capstan shaft 29 for the optical fiber cable can be moved in the longitudinal direction at a speed in the range of 50 mm / min to 500 mm / min for fast feed and 5 mm / min to 50 mm / min for fast feed. It is designed to move. Moreover, the capstan shaft 29 for optical fiber cables is provided with an indicating piece 29a for indicating the position of the scale plate 30 at one end. The remaining length ratio of the self-supporting optical cable can be changed by moving the capstan shaft 29 for the optical fiber cable according to the position of the mark 31 on the scale plate 30.

  The extra length of the self-supporting optical cable 1 will be described. The distance from the center of the cross section perpendicular to the length direction of the suspension line portion 8 to the center of rotation of the suspension capstan shaft 23 is defined as the center radius R of the suspension line portion 8, and the cross section perpendicular to the length direction of the optical fiber cable portion 9 When the distance from the center of the optical fiber cable portion 9 to the rotation center of the suspension capstan shaft 23 is the layer core radius of the optical fiber cable portion 9, the difference between the layer core radius of the optical fiber cable portion 9 and the core radius R of the suspension wire portion 8 Is represented by G / R (%). Further, the surplus length is caused by the difference between the layer center radii. The larger the difference G between the layer center radii, the larger the surplus length.

  Next, a method for manufacturing a self-supporting optical cable with a surplus length according to the first embodiment will be described with reference to FIGS. The suspension line 3 drawn out from the suspension drum 11 and the optical fiber cable 2 drawn out from the optical fiber cable drum 12 are arranged in parallel and sent to the extruder 13. Extruder 13 and extruder crosshead 15 collectively extrude and coat sheaths 5A and 5B having a gourd-shaped cross section. Here, the slit 6 formed in the neck portion 4 of the self-supporting optical cable 1 is formed by intermittent extrusion when the slit forming device 14 provided in the extruder crosshead 15 performs batch extrusion molding.

  Next, in a state where the suspension line portion 8 and the optical fiber cable portion 9 are arranged in parallel, the layer center radius of the optical fiber cable portion 9 is only G with respect to the layer center radius R of the suspension line portion 8 as shown in FIG. The position of the optical fiber cable capstan 22 (A) was adjusted so as to be large, so that a predetermined extra length was inserted into the optical fiber cable portion 9.

Next, the hanging wire portion 8 is provided in the hanging wire portion contact groove 21a of the capstan 20 and the optical fiber cable portion 9 is provided in contact with the optical fiber cable portion contact surface 22a while moving the self-supporting optical cable 1. Cooling. At this time, the self-supporting optical cable 1 makes one round of the capstan. However, when the self-supporting optical cable 1 is close to the end of one turn , there is a risk of contact with the self-supporting optical cable 1 at the start of winding. Therefore, the traveling direction of the self-supporting optical cable 1 is shifted to the left in FIG. 5 by the vertical roll 16A near the end of one round. Next, the traveling direction of the self-supporting optical cable 1 is corrected by the guide rolls 16B and 16C. The neck 4 is cooled by the capstan cooling water tank 16. The self-supporting optical cable 1 is subsequently cooled in the cooling water tank 17, taken up by the take-up machine 18, and taken up by the take-up drum 19.

According to the first embodiment, the capstan 20, by dividing the suspension wire 8 to a hanging wire capstan 21 abutting (a) an optical fiber cable capstan 22 (b), cap for optical fiber cables Since the stan 22 (a) is movably arranged with respect to the suspension capstan 21 (a), it is no longer necessary to replace the cabstan each time the optical cable size or the suspension line size changes. Further, since the optical fiber cable capstan 22 (a) can be moved in the length direction by changing the rotational motion of the motor to a linear motion, precision can be improved by changing the ratio between the rotational motion and the linear motion. It is possible to set a surplus length ratio. Moreover, since the protrusion 22b is accommodated in the recessed part 45 of the capstan 21 (a) for suspension lines, the enlargement of a capstan can be prevented.

  FIG. 6 shows a capstan 20 used in the self-supporting optical cable manufacturing apparatus with extra length according to the second embodiment of the present invention, and FIG. 7 shows a schematic cross section along the line AA in FIG. Show. The capstan 20 is different from the first embodiment in the aspect of the optical fiber cable capstan 22 (b).

  That is, the optical fiber cable capstan 22 (b) includes a cylindrical trapezoidal optical fiber cable roller mounting frame 37 attached to an optical fiber cable capstan shaft 29 made of stainless steel, and an optical fiber cable roller mounting frame. 37, an optical fiber cable roller shaft 36 provided on the outer periphery of the optical fiber cable 37, and a plurality of optical fiber cable rollers 35 rotatably attached via the optical fiber cable roller shaft 36. The plurality of optical fiber cable rollers 35 are attached to the outer periphery of the optical fiber cable roller mounting frame 37 along an optical fiber cable roller mounting pitch circle 38.

  Here, the capstan 22 for the optical fiber cable (B) is fixed without rotating with respect to the capstan shaft 29 for the optical fiber cable, and as the self-supporting optical cable 1 moves, the capstan 22 for the optical fiber cable is used. The roller 35 rotates. As the self-supporting optical cable 1 moves, the suspension capstan 21 (a) rotates relative to the suspension capstan shaft 23.

  According to the second embodiment, the capstan 20 is divided into a suspension capstan 21 (A) that abuts the suspension portion 8 and an optical fiber cable capstan 22 (B), and an optical fiber cable capstan. Since 22 (b) is arranged to be movable with respect to the suspension capstan 21 (a), it is no longer necessary to replace the cabstan each time the optical cable size or the suspension line size changes. Further, since the optical fiber cable roller 35 rotates, it is not necessary to rotate the optical fiber cable capstan 22 (B), so that an expensive rotating mechanism such as a bearing is not necessary, and the cost can be reduced.

  FIG. 8 shows a capstan 20 used in a self-supporting optical cable manufacturing apparatus with a surplus length according to the third embodiment of the present invention, and FIG. 9 shows a schematic cross section along the line BB in FIG. Show. The capstan 20 is different from the second embodiment in a suspension capstan 21 (b).

  That is, the suspension line capstan 21 (b) includes a plurality of suspension line rollers 39 having a suspension line abutment portion 21 b that abuts the suspension line portion 8, and a plurality of suspension line rollers 39 and a plurality of attachments via the bearings 42. A suspension line roller shaft 40 and a suspension line roller mounting frame 41 in which a plurality of suspension line roller shafts 40 are mounted along a suspension line roller mounting pitch circle 43 are provided. The suspension line capstan 21 (B) is fixed to the suspension line capstan shaft 23.

  Since the optical fiber cable capstan 22 (b) is the same as that of the second embodiment, the description thereof is omitted.

  Here, the hanging portion 8 of the self-supporting optical cable 1 is stretched between the hanging portion contact portions 21 b of the hanging roller, and the optical fiber cable portion 9 is brought into contact with the optical fiber cable roller 35. The self-supporting optical cable 1 moves as the self-supporting optical cable 1 is pulled by the take-up machine 18, and accordingly, the hanging portion 8 moves to the adjacent hanging roller 39 while rotating the hanging roller 39. Go. On the other hand, the optical fiber cable portion 9 moves while rotating the optical fiber cable roller 35.

According to the third embodiment, the capstan 20 is divided into the suspension capstan 21 (b) for contacting the suspension part 8 and the optical fiber cable capstan 22 (b), and the optical fiber cable capstan. 22 (b) is movably arranged with respect to the suspension line capstan 21 (b) and supports the suspension line roller 39 of the suspension line capstan 21 (b) so that the optical cable size and the suspension line size change. In addition, there is no need to replace the capstan. Further, as the self-supporting optical cable 1 is moved, it is not necessary to rotate the entire suspension capstan 21 (ro) and optical fiber cable capstan 22 (ro) as in the first embodiment. Can be simplified and the cost can be reduced.

  The capstan may be made of gunmetal, brass, stainless steel or the like that is easy to process and lightweight, and is relatively resistant to corrosion. Further, it may be made of iron and the surface is subjected to treatment such as plating. Further, engineering plastic or engineering plastic reinforced with metal may be used.

  Further, the suspension capstan shaft and the optical fiber cable capstan shaft may be made of a strong and hardly corroded material such as brass.

  In addition, the capstan bearing for suspension lines and the capstan bearing for optical fiber cables shall have a waterproof structure such that the bearing part goes out of the water tank, or the bearing part has a waterproof structure and a waterproof bearing is used. May be.

  Further, the outer shape of the capstan or the cylindrical body is preferably as large as possible in consideration of cooling of the self-supporting optical cable, but 500 to 5000 mmφ is preferable from the viewpoint of installation of the capstan and the workability.

  Also, in each embodiment, the suspension capstan is fixed in the axial direction, and the capstan for the optical fiber cable is moved in the axial direction to change the surplus length ratio. The capstan for an optical fiber cable may be fixed in the axial direction. Further, both capstans may be moved.

1 is a perspective view of a self-supporting optical cable with a surplus length according to a first embodiment of the present invention. 1 is a side view of a self-supporting optical cable according to a first embodiment of the present invention. It is an expanded sectional view of the diameter direction of the self-supporting type optical cable concerning a 1st embodiment of the present invention. It is a figure which shows the self-supporting type optical cable manufacturing apparatus with extra length which concerns on the 1st Embodiment of this invention. It is a schematic sectional drawing which shows the capstan used for the self-supporting type optical cable manufacturing apparatus with extra length concerning the 1st Embodiment of this invention. It is a schematic sectional drawing which shows the capstan used for the self-supporting type optical cable manufacturing apparatus with extra length concerning the 2nd Embodiment of this invention. It is a schematic sectional drawing in alignment with the AA of FIG. It is a schematic sectional drawing which shows the capstan used for the self-supporting type optical cable manufacturing apparatus with extra length concerning the 3rd Embodiment of this invention. It is a schematic sectional drawing which follows the BB line of FIG. It is a figure which shows the conventional self-supporting type | mold optical cable containing extra length. It is a figure which shows the conventional self-supporting type optical cable manufacturing apparatus containing extra length. It is sectional drawing which shows the capstan used for the conventional self-supporting type optical cable manufacturing apparatus containing extra length.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-supporting type optical cable 2 Optical fiber cable 3 Hanging line 4 Neck part 5B Optical fiber cable sheath 5A Hanging line sheath 6 Slit 7 Meandering part 8 Hanging line part 9 Optical fiber cable part 10 Self-supporting type optical cable manufacturing apparatus 11 Hanging line drum 12 Optical fiber cable Drum 13 Extruder 14 Slit forming device 15 Extruder crosshead 16 Capstan cooling water tank 16A Vertical roll 16B, 16C Guide rail 17 Cooling water tank 18 Take-up machine 19 Take-up drum 20 Capstan 21 (A) Hanging capstan (No. 1) First and second embodiments)
21 (b) Capstan for suspension line (third embodiment)
21a Suspension line contact groove 21b Suspension contact 22 (A) Capstan for optical fiber cable (first embodiment)
22 (b) Capstan for optical fiber cable (second and third embodiments)
22a Optical fiber cable portion contact surface 22b Protruding portion 23 Suspension capstan shaft 24 Suspension capstan bearing 25 Suspension capstan retaining ring 26 Motor 27 Optical fiber cable capstan bearing 28 Optical fiber cable capstan retaining ring 29 Capstan shaft for optical fiber cable 29a Indicator piece 30 Scale plate 31 Mark 32 Screw shaft 35 Roller for optical fiber cable 36 Roller shaft for optical fiber cable 37 Roller mounting frame for optical fiber cable 38 Mounting pitch circle 39 Suspension roller 40 Suspension wire Roller shaft 41 Roller mounting frame for suspension line 42 Bearing 43 Mounting pitch circle 45 Recess 50 Self-supporting optical cable 60 Self-supporting optical cable manufacturing apparatus 61 Suspension drum 62 Optical fiber cable drum 3 extruder 64 capstan 64a half groove 64b outer peripheral portion 64A vertical rolls 64B, 64C guide rail 65 water tank 66 take-up machine 67 drum

Claims (8)

In the manufacturing apparatus for the self-supporting optical cable of the cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of the suspension line and the optical fiber cable and an extra length is given to the optical fiber cable,
A first capstan rotatably attached to a capstan shaft for a suspension wire, which winds and pulls a suspension wire portion formed by applying the sheath to the suspension wire ;
An optical fiber cable portion arranged in parallel with the first capstan and formed by applying the sheath to the optical fiber cable is wound around a tapered winding outer peripheral surface, and is rotated around the capstan shaft for an optical fiber cable. A second capstan attached freely ;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. An apparatus for manufacturing a self-supporting optical cable, comprising: a capstan moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. In the manufacturing apparatus for the self-supporting optical cable of the cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of the suspension line and the optical fiber cable and an extra length is given to the optical fiber cable,
A first capstan rotatably attached to a capstan shaft for a suspension wire, which winds and pulls a suspension wire portion formed by applying the sheath to the suspension wire;
A plurality of optical fiber cables arranged around the winding outer peripheral surface, arranged in parallel with the first capstan, and wound around a tapered winding outer peripheral surface formed by applying the sheath to the optical fiber cable. A second capstan provided with rollers for use;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. An apparatus for manufacturing a self-supporting optical cable, comprising: a capstan moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. In the manufacturing apparatus for the self-supporting optical cable of the cross-sectional gourd type in which a sheath is collectively applied to the outer periphery of the suspension line and the optical fiber cable and an extra length is given to the optical fiber cable,
A first capstan provided with a plurality of suspending-line rollers for wrapping the suspending line part and winding the suspending line part formed by applying the sheath to the suspending line;
A plurality of optical fiber cables arranged around the winding outer peripheral surface, arranged in parallel with the first capstan, and wound around a tapered winding outer peripheral surface formed by applying the sheath to the optical fiber cable. A second capstan provided with rollers for use;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. An apparatus for manufacturing a self-supporting optical cable, comprising: a capstan moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. The self-supporting optical cable according to any one of claims 1 to 3, wherein the first capstan has a curvature that is the same as or close to an outer diameter of the suspension line portion, and has a curved surface that winds the suspension line portion. Manufacturing equipment. In the capstan that wraps and pulls a gourd-shaped self-supporting optical cable with a sheath in a lump on the outer periphery of the suspension line and the optical fiber cable,
A first capstan rotatably attached to a capstan shaft for a suspension wire, which winds and pulls a suspension wire portion formed by applying the sheath to the suspension wire ;
An optical fiber cable portion arranged in parallel with the first capstan and formed by applying the sheath to the optical fiber cable is wound around a tapered winding outer peripheral surface, and is rotated around the capstan shaft for an optical fiber cable. A second capstan attached freely ;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. A capstan comprising a moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. In the capstan that wraps and pulls a gourd-shaped self-supporting optical cable with a sheath in a lump on the outer periphery of the suspension line and the optical fiber cable,
A first capstan rotatably attached to a capstan shaft for a suspension wire, which winds and pulls a suspension wire portion formed by applying the sheath to the suspension wire;
A plurality of optical fiber cables arranged around the winding outer peripheral surface, arranged in parallel with the first capstan, and wound around a tapered winding outer peripheral surface formed by applying the sheath to the optical fiber cable. A second capstan provided with rollers for use;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. A capstan comprising a moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. In the capstan that wraps and pulls a gourd-shaped self-supporting optical cable with a sheath in a lump on the outer periphery of the suspension line and the optical fiber cable,
A first capstan provided with a plurality of suspending-line rollers for wrapping the suspending line part and winding the suspending line part formed by applying the sheath to the suspending line;
A plurality of optical fiber cables arranged around the winding outer peripheral surface, arranged in parallel with the first capstan, and wound around a tapered winding outer peripheral surface formed by applying the sheath to the optical fiber cable. A second capstan provided with rollers for use;
The first and second capstans are given relative movement in the direction of the rotation axis, and the center radius of the optical fiber cable portion wound around the tapered winding outer peripheral surface of the second capstan is set to the first capstan. A capstan comprising a moving part that is larger than a layer center radius of the hanging line part wound around one capstan by a predetermined ratio. The capstan according to any one of claims 5 to 7, wherein the first capstan has a curvature that is the same as or close to an outer diameter of the suspension line portion, and has a curved surface around which the suspension line portion is wound.

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