JPS6250806B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing device for an optical fiber spacer cable, and more particularly, the present invention relates to a processing device for an optical fiber spacer cable, and more specifically, for processing an optical fiber spacer cable in which an optical fiber is arranged in a groove in a spacer cable having a groove twisted in a spiral shape. The present invention relates to a processing device for adjusting the surface and groove shapes to predetermined shapes.

As shown in FIG. 1, the optical fiber spacer cable is constructed by forming a plurality of grooves 2, 2, . It is a long cable in which an optical fiber (not shown) is placed.

To manufacture such an optical fiber spacer cable, a base is rotatably attached to the nozzle of an extrusion molding machine, and an extrusion hole with a plurality of convex portions (not shown) formed on the inner circumferential wall is attached to the base. A method has been adopted in which a plurality of spirally twisted concave grooves are formed on the surface of the resin wire by molding the resin wire, extruding the resin at the same time as the base is rotated, and coordinating the rotation of the base and the extrusion of the resin. was.

FIG. 2 is a completed diagram of the optical fiber spacer cable manufactured in this way.As mentioned above, in order to manufacture the cable while rotating the base, the concave groove 2 is , 2... are deformed to a much greater extent than the outer diameter of the optical fiber 4, or as shown in Figure b, the width dimension of the optical fiber 4 is deformed to be smaller than the outer diameter of the optical fiber 4, making it difficult to insert. In other cases, the connector was completely deformed, making it impossible to insert it.

The present invention has been made in view of the above drawbacks, and its object is to provide a groove having a predetermined shape into which an optical fiber can be inserted easily and reliably, as shown in Figure 4a. , or as shown in FIG. b, the openings 5, 5 of the grooves...
To provide an apparatus for processing an optical fiber spacer cable having a predetermined shape completely by forming some protrusions 6, 6, etc. on the cable and having a shape that does not easily come off.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 5 is a sectional view of the processing device according to the present invention, and FIG.
The figure shows a conceptual diagram of the entire apparatus when processing an optical fiber spacer cable using this processing apparatus.

In FIG. 5, the optical fiber spacer cable processing apparatus 10 according to the present invention consists of an upper mold block 12 and a lower mold block 13 that are divided above and below a center line 11, and the boundary line between these blocks is A cylindrical flow hole 14 is bored in the center of the block about the center line 11. Then, with the flow hole 14 sandwiched from the front and back, a pressure die 15 is placed on one side, and a cutting die 1 is placed on the other side.
6 is installed around the periphery via a bearing 17 to enable smooth rotation.

Further, the blocks 12 and 13 themselves are entirely supported by a support base 19 via a bearing 18 at the center thereof.

FIG. 6 is a view showing the pressure die 15, in which FIG. 6A is a sectional view and FIG. 6B is a perspective view.

As can be clearly seen in the figure, the whole body becomes a disc body,
A penetrating through hole 15a is bored in the center of the optical fiber spacer cable so as to have the same size as the outer diameter of the optical fiber spacer cable. One of the openings of the through hole 15a is formed with a circular hole 15b having a tapered cross section so that its inner diameter gradually expands and ends.

FIG. 7 shows the cutting die 16, with FIG. 7a being a sectional view and FIG. 7b being a perspective view.

According to the same figure, the overall shape is a disc body, and the disc has a through hole 16a penetrating through the center of the disc.
6a, one of its open openings has a raised hill-shaped body 16b around the through hole 16a, and the other open opening has a gently concave curved surface 16c around it.

Further, the through hole 16a has protruding stripes 16d, 16 on its inner surface that match the cross-sectional shape of the groove 2 formed in the optical fiber spacer cable.
d... are provided with an inclination that follows the fluid pattern of the groove 2. Therefore, the inner peripheral surface of the through hole 16a in the cutting die 16 is the same as the outer diameter of the optical fiber spacer cable, and the protruding stripes 16d, 16d formed on the inner peripheral surface are similar to the grooves 2 provided on the cable. is configured for a mating fit.

To explain the case where the surface of an optical fiber spacer cable is processed using the optical fiber spacer cable processing apparatus having the above structure, in FIG. 8, 20 is a synthetic resin extruder, 21
22 is a die head thereof, 22 is a base having a convex portion on the inner periphery, 23 is an optical fiber spacer cable extruded from an extruder 20, 24 is a heat-retaining tank, and 25 is a cable take-off device.

The processing device 10 is installed in the heat-retaining tank 24. Using such an apparatus, first, a wire made of a resin material is extruded while rotating the die head 21 and the die 22 of the extruder 20.

The wire is sequentially and smoothly twisted by the rotation of the cap 22, and at the same time, a concave groove 2 is formed on the surface by a convex portion on the inner circumferential wall of the cap.

The wire rod, that is, the optical fiber spacer cable passes through the heat insulating tank 24 while being sequentially extended, and is transferred to the processing device 1.
0 is inserted.

Warm water is constantly circulated in the heat-retaining tank 24 to keep the resin material from hardening.

In the processing device 10, first, the pressing die 15 passes through the through hole 15a while sliding through the circular hole 15b. At this point, the fiber optic spacer cable has its surface adjusted to a cylindrical mirror surface.

That is, the optical fiber spacer cable released from the base 22 is still in a deformable state and passes through the through hole 15a of the pressure die 15 while being subjected to circumferential pressure on the entire inner circumference.

This allows the deformation of the surface shape of the spacer cable to be adjusted again.
At this time, the pressure die 15 presses the bearing 17 on the outer periphery.
Since the spacer cable can be rotated freely and gently due to the presence of the spacer cable, it is not deformed in the extending direction of the spacer cable.

What is shown in FIG. 9 is an explanatory diagram with a portion cut away when the spacer cable passes through.

Next, move the intermediate flow hole 14 as it is,
It is inserted into the cutting dies 16 located at opposite positions. The inserted optical fiber spacer cable fits into the concave groove 2 provided therein and onto the protruding strip 16d in the through hole 16a provided in the cutting die 16, and while the concave groove 2 is cut and corrected, the take-off device 25 It will be taken over by.

FIG. 10 is a partially cutaway explanatory diagram showing this state.

At this time, since the concave groove 2 is twisted, the cutting die 16 itself also moves freely due to the action of the bearing 17.

The optical fiber spacer cable that has passed through the processing device 10 is then wound by a take-off device.

FIG. 11 is a perspective view showing a part of the optical fiber spacer cable completed through the above-mentioned processing device, in which a concave groove into which the optical fiber wire is inserted is clearly formed.

Note that the processing device of the present invention is not limited to the above-mentioned embodiment, and for example, a pressure die and a cutting die can be arranged and operated separately, or both can be operated using surface pressure and grooves. Any device suitable for the situation at the time can be used, such as using a cutting die in the form of a cutting die.

As described above, the present invention separately performs surface pressing and groove cutting of an optical fiber spacer cable by arranging a pressurizing die and a cutting die in the same line so that they can freely move using bearings. In addition, since it is a device that reprocesses wire rods while maintaining heat retention after being extruded by an extruder, it is not possible to cool and solidify the wire rod that has been twisted and extruded from an extruder, as was done in the past. When compared, there are no defects in the molded shape, and a shape that allows the optical fiber wire to be completely and easily inserted is obtained, so the work efficiency can be improved, and the effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an optical fiber spacer cable with a concave groove for inserting an optical fiber, and Fig. 2 is an optical fiber spacer cable having a twisted concave groove for inserting an optical fiber. Figure 3a is a cross-sectional view of an optical fiber spacer cable showing a specific example of a defective state in which the concave groove is enlarged, and Figure 3b is a perspective view of a defective condition in which the concave groove is deformed or narrowed. FIG. 4A is a cross-sectional view showing a specific example with a normal groove; FIG. 4B is a diagram of another embodiment with a normal groove; Fig. 5 is a sectional view showing the optical fiber spacer cable processing apparatus according to the present invention, Fig. 6a is a sectional view of a pressure die, Fig. 6b is a perspective view, and Fig. 7a is a sectional view of a cutting die. , Figure b is also a perspective view, No. 8
The figure is a conceptual diagram showing the entire molding process, Figure 9 is a partially cutaway explanatory diagram showing the state in which the optical fiber spacer cable is inserted into the pressure die, and Figure 10 is the light beam inserted into the cutting die. FIG. 11 is a partially cutaway explanatory view showing a state in which a fiber cable is inserted and a concave groove is formed, and FIG. 11 is a perspective view showing a part of a completed optical fiber spacer cable. 1... Optical fiber cable wire material, 2... Concave groove, 4... Optical fiber wire material, 5... Open opening, 6
... protrusion, 10 ... processing device, 12 ... upper mold block, 13 ... lower mold block, 14 ... flow hole,
15...Pressure die, 15a...Through hole, 15b...
...Circular hole, 16...Cutting die, 16a...Through hole, 16b...Hill shaped body, 16c...Concave curved surface, 16
d... Projection strip, 17... Bearing, 20...
Insertion machine, 21... Die head, 22... Base, 2
4...Heat tank, 25...Receiving device.

Claims (1)

[Scope of Claims] 1. A rotatable mouthpiece is installed at the extrusion port at the tip of a synthetic resin extruder, a convex portion is formed on the inner peripheral wall of the mouthpiece, and the resin is extruded at the same time as the mouthpiece is rotated. By coordinating the rotation of the cap and the extrusion of the resin, a spirally curved concave groove is formed on the surface of the optical fiber spacer cable, and then the cable is passed through a rotatable pressing die equipped with a through hole. Furthermore, the surface of the wire and the groove are formed into a predetermined shape by passing it through a rotatable cutting die equipped with a protruding strip that fits into a spirally curved groove formed in the wire. An optical fiber spacer cable processing device characterized by being able to perform. 2. The optical fiber spacer cable according to claim 1, wherein the pressing die and the cutting die are fitted into the groove and automatically follow the rotation of the groove of the optical fiber spacer cable. processing equipment. 3. The optical fiber spacer cable processing apparatus according to claim 1, wherein the pressing die and the cutting die through which the optical fiber spacer cable is inserted are installed on a straight line.