JPH0871266A - Fiber Optic Cable Slot Rod Slice Tool - Google Patents

Abstract

(57) [Abstract] [Purpose] To cut the resin layer 2 of the slot rod P of the slot rod type optical fiber cable safely and surely. [Structure] A nut 20 is screwed onto the outer surface of the tool body 6, and a cutter 15 protruding from the outer surface is provided so as to be capable of undulating. The cutter 15 is pressed outward by the spring 13. When the nut 20 is screw-turned, the cutter 15 is laid down by the progress of the nut 20 and its tip blade penetrates into the resin layer 2 through the slot, and stops the nut 20 when it hits the steel wire. When the grip 21 is turned from this state, the blade at the tip of the cutter 15 makes a cut around the resin layer of the slot rod P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for removing a resin portion of a slot rod of a slot rod type optical cable.

[0002]

[Technical Background] The slot rod type optical cable is shown in FIG.
As shown in FIG. 5, a resin layer 2 made of polyethylene or the like is formed around a steel wire 1, and a flat optical fiber a or a round optical fiber a is stacked and housed in a spiral slot 3 of the resin layer 2. Is.

At the end treatment or intermediate connection treatment of this slot rod type optical cable, it is necessary to remove the resin layer 2 of the slot rod P. This resin layer 2
Is adhered to the central steel wire 1 linearly in the longitudinal direction thereof or intermittently with an adhesive resin so as not to shift in the longitudinal direction of the steel wire 1. Therefore, when the resin layer 2 is removed, it cannot be easily removed like making a cut at a desired position and pulling out the insulator in the axial direction like a general insulated wire.

Therefore, in removing the resin layer 2 of the slot rod P of the slot rod type optical cable, as shown in FIG. 5, a cut is made in the length direction along the slot 3 of the slot rod P of the portion to be removed. After making a notch c in the outer peripheral direction at the position to be further removed, the part to be removed is pinched by a pinching tool such as radio pliers and is removed by turning.

[0005]

In the work of removing the resin layer, it is necessary to have a great deal of skill to make the cut c in the resin layer 2 of the slot rod P, and the work such as the hand slipping and making a cut. There is a security problem.

In view of the above situation, it is an object of the present invention to provide a tool capable of easily making a cut c reaching the steel wire 1 in the resin layer 2 simply by rotating the slot rod P in the circumferential direction.

[0007]

In order to solve the above problems, a first invention of the present application is directed to a tool main body having a through hole for a slot rod at the center, and a blade edge of a cutter pin in the axial direction of the slot rod. And a cutter holder mounted on the tool body so that the cutting edge of the cutter holder is orthogonal to the axis of the slot rod, and a bag for controlling the swinging and fixing of the cutter holder. It is composed of nuts.

A second aspect of the present invention is a slot rod for an optical fiber cable, in which a resin layer is provided around a steel wire, and slots for storing optical fibers are formed in the resin layer at equal intervals around the entire length in the length direction. In the wheel cutting tool, the outer surface of the tool body having a hole through which the slot rod penetrates as a central axis is screwed with a nut that is movable in the axial direction, and in the tool body on the front side in the moving direction of the nut, the An axially long cutter protruding from the outer surface is provided so as to be able to rise and fall, and a blade facing the circumferential direction of the tool main body is attached to the tip of this cutter, and the cutter is pushed by the nut to fall down, The tip blade is configured to bite into the resin layer of the slot rod penetrating the hole on the central axis.

[0009]

In the slot rod wheel cutting tool according to the present invention having the above-described structure, the slot rod is inserted into the hole on the central axis by the length for cutting the resin layer. Next, when the nut is screwed to the front side, the cutter goes down as the nut advances and its tip blade bites into the resin layer, and stops the nut when it hits the steel wire. When this tool is rotated from this state, a cut is made around the resin layer by the tip blade thereof.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 6 is a tool main body, and a hole 7 through which a slot rod P penetrates is formed on the central axis thereof. The front side of the tool body 6 is formed so that the radial groove 8 does not reach the slot rod through-hole 7 in the outer trisection. A cutter 15 is mounted in the radial groove 8 via a pin 14 so as to be up and down freely. This cutter 15
A spring 13 is inserted below the boundary between the arm portion 15a and the scent portion 15b, and the cutter 15 is urged outward by the spring 13. A cutter blade 12 facing the circumferential direction of the tool body 6 is fixed to the tip of the cutter 15 with a screw.

The cap nut 20 is screwed onto the outer surface of the tool main body 6, and by advancing, the inner taper 19 of the end edge engages with the scent portion 15b of the cutter 15, and the cutter 15 is gradually tightened. Then, the blade 12 bites into the resin layer 2 of the slot rod P.

Reference numeral 21 denotes an annular grip, which is fixed to the tool body 6 with a screw 21a and prevents the cap nut 20 and the tool body 7 from rotating together when the cap nut 20 is rotated. Hand held, cap nut 20
To rotate.

This embodiment is constructed as described above. Next, its operation will be described. As shown in FIG.
The slot rod P is inserted into the through hole 7 by the length for cutting the resin layer 2. Next, when the nut 20 is screw-turned to the front side, the cutter 15 lies down due to the progress thereof, the tip blade 12 bites into the resin layer 2, and stops the nut 20 when it hits the steel wire 1.

From this state, when the tool is turned around the slot rod P with the grip 21, the tip blade 12 makes a cut c around the resin layer 2.

When the cut c enters the entire circumference, the nut 20 is retracted, the cutter 15 is raised (returned), the blade 12 is removed from the resin layer 2, and then the tool is removed from the slot rod P. After that, the cuts from the cut c to the tip are put in the resin layer 2 in the slot by an appropriate means, and then, as shown in FIG. 5, the cut pieces are separated from the steel wire 1 and removed.

The number of cutters 15 is appropriately selected according to the diameter of the slot rod P.

[0017]

As described above, according to the present invention, it is possible to make a circumferential fold in the resin layer by a simple operation of screwing the nut and rotating the tool. Therefore, the operation becomes safe and reliable.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment.

FIG. 2 is a cutaway front view of the same embodiment.

FIG. 3 is a left side view of the same embodiment.

FIG. 4 is a cut side view of the slot rod.

FIG. 5 is a perspective view of the slot rod in a torn state.

[Explanation of symbols]

 1 Steel Wire 2 Resin Layer 3 Slot 6 Tool Body 7 Through Hole 8 Radial Groove 12 Cutter Blade 13 Spring 15 Cutter 19 Inner Tapered Surface 20 Cap Nut 21 Annular Grip

Claims (2)

[Claims] 1. A tool body having a through hole for a slot rod at its center, and a blade edge of a cutter capable of swinging and fixing around a pin in the axial direction of the slot rod, and the blade edge is orthogonal to the axis of the slot rod. A slot rod wheel cutting tool for an optical fiber cable, which comprises a cutter holder attached to the tool body in this manner and a cap nut for controlling swinging and fixing of the cutter holder. 2. A slot rod of an optical fiber cable in which a resin layer 2 is provided around a steel wire 1, and the resin layer 2 is provided with slots 3 for accommodating an optical fiber formed at equal intervals around the entire length in the length direction thereof. A P wheel cutter having a nut 20 movable in the axial direction on the outer surface of the tool body 6 having a hole 7 through which the slot rod P penetrates as a central axis.
Is fitted to the inside of the tool main body 6 on the front side in the moving direction of the nut 20, and a cutter 15 projecting from the outer surface thereof is provided so as to be capable of undulating, and the tip of the cutter 15 is arranged in the circumferential direction of the tool main body 6. When the cutter 15 is pushed down by the nut 20, the cutter blade 15 cuts into the resin layer 2 of the slot rod P penetrating the hole 7 on the central axis. A slotted rod slitting tool for optical fiber cables, which is characterized by being embedded.