JPH0631320U - Loose tube jacket removal jig - Google Patents

Abstract

(57) [Abstract] [Purpose] When connecting a branch line in the middle of a covered communication line, if the cover (outer jacket) in the middle of the communication cable (loose tube) is partially cut and removed, the loose tube The purpose is to completely prevent the core wire of the loose tube from being damaged by the cutting edge of the jacket removing jig. [Construction] A through hole 6 is provided on the upper surface of a jig body 1 to which a cutting cutter 5 having a planer shape is attached, and a pressing member 2 for pressing a loose tube 10 from the back surface is detachably attached, and the through hole 6 is provided behind the cutter blade edge. A loose tube jacket removing jig configured by vertically moving a core wire pressing rod 7 in the hole 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 When connecting a branch line in the middle of a covered communication line, a part of the cover in the middle of the communication cable must be cut and removed. The present invention relates to a jig for safely and easily performing the above-mentioned work of removing the coating (work of cutting and removing a part), and a loose tube (a large number of single-core wires together with a jelly-like compound is used as a loose tube. When part of the outer cover of the communication wire (covered with the outer cover) is removed using the above jig, the core of the loose tube may be damaged (damaged or cut) by the cutting edge of the jig. It can be completely prevented.

[0002]

[Prior art]

 Various methods are used, such as removing with a special cutter to remove a part of the envelope of the loose tube, or with a special jig like a planer. Among them, the method of using a dedicated jig like a planer is the most efficient, and there is little risk of damaging the core wire and it is safe. However, when removing the sheath of the loose tube, even when using a jig like a knife, when the cutting edge hits the core wire of the loose tube, the core wire moves in the jelly-like compound of the loose tube. If it escapes, it will not be damaged at the cutting edge, but if the core wire cannot escape freely, it is often damaged at the cutting edge. Especially, the risk is great when the core wire is a tape core wire.

[0003]

[Problems to be solved by the device]

 The present invention aims to solve the problem of using a cutting tool such as a planer, regardless of the arrangement of the core wire within the jacket and the type of the core wire. The problem is to reliably prevent the cutting edge of the jig from coming into contact with the core wire.

[0004]

[Means for Solving the Problems] The measures taken to solve the above problems are as follows. Attach a cutter like a planer and attach a pressing member that presses the loose tube from the back in a detachable manner.A through hole is provided on the upper surface of the jig body behind the cutter blade tip, and a core wire holding rod is vertically movable in the hole. What I did.

[0005]

[Work]

 When the pressing member is inserted under the loose tube and the pressing member and the jig body are tightened to firmly clamp the loose tube, the cutting edge of the planer cutter cuts into the sheath of the loose tube. In this state, the jig is slightly moved (advanced) in the longitudinal direction with respect to the loose tube to remove the part of the jacket, and the core wire holding rod is pushed in. When the presser bar is pushed in, the tip of the presser bar enters the inside of the jacket by the cutter and presses the core wire. Since the tip of the presser bar is pushed down below the cutting edge of the cutter, even if the cutting edge hits the core wire, the core wire is pushed down and separated from the cutting edge of the cutter. After that, the jig is moved (advanced) in the longitudinal direction of the loose tube by the required length, and the jacket is cut out by the required length. During this operation, the tip of the pressing rod moves while holding the core wire, so the cutting edge of the cutter does not hit the core wire during this operation.

[0006]

【Example】

First, a first embodiment of the principle will be described with reference to FIGS. 1, 2 and 3. The jig main body 1 has basically the same structure as a main body of a planer for cutting ordinary wood, and a cutter 5 is inserted into a slender cutter insertion hole 4 which is long and slender horizontally and fixed by a screw 5a. ing. A through hole 6 for inserting a pressing rod is provided at the rear (right side) of the cutter insertion hole 4, and a wide core wire pressing rod 7 is inserted into this hole 6. A core wire pressing rod 7 is connected to the other end of a plate spring 8 having one end fixed to the upper surface of the jig body 1, and the plate spring 8 elastically holds the pressing rod 7 at a position pulled up. A jig main body having a holding member 2 having a circular cross-section holding groove g ₁ for receiving a loose tube 10 in which a large number of core wires c are covered with a jacket s together with a jelly compound j, and a holding groove g ₂ having a circular cross-section on the lower surface. The loose tube 10 is clamped by 1 and clamped by a suitable means such as tightening screws 3 and 3 to firmly clamp the loose tube 10. By this operation, the cutting edge of the cutter 5 cuts into the jacket s. After that, the jig is slightly advanced with respect to the loose tube 10 to open the cut portion by a length L, and then the head 7a of the holding rod 7 is pressed with a fingertip to push the pressing rod against the leaf spring 8. As a result, the uppermost cord c is pushed down by the tip of the pressing rod 7 and is reliably separated from the cutting edge of the cutter 5. While holding down the pressing rod 7, the jig is advanced toward the loose tube 10 to remove the jacket s by the length required for the core wire connecting work. During the external cutting operation, the tip of the pressing rod 7 advances while holding the core wire c, so that the core wire does not hit the cutting edge of the cutter 5. Next, a second embodiment will be described with reference to FIG. The jig main body 31 of this embodiment has a groove 32 having a U-shaped cross section on the upper surface, and a cutter insertion hole and a pressing rod insertion hole are provided at the bottom of the groove 32, and a cutter is inserted into the cutter insertion hole. It is fixed with a set screw. The pressing rod 33 is inserted into the pressing rod insertion hole. A loose tube holding groove 34 is provided at the center of the lower surface of the jig body, and a dovetail groove 35 is provided adjacent to the loose tube holding groove 34. The dovetail groove 35 has a trapezoidal cross-sectional shape with the side surface inclined inward, but in the drawing, the left end (front end) has a wide width and the right end (rear end) has a narrow width. . The pressing member 36 for pressing the loose tube from below has a loose tube holding groove 37 on the upper surface thereof and a convex portion 38 adjacent to this. This convex portion 38 has a cross-sectional shape similar to the dovetail groove 35 of the jig body 31, and has a wedge-shaped convex portion having a wide left end (front end) and a narrow right end (rear end). is there. The pressing member 36 is inserted under the loose tube, the loose tube is fitted into the loose tube holding groove 37, and the left end of the dovetail groove 35 of the jig body is inserted into the right end of the convex portion 38 of the pressing member 36. In this state, the fitting between the two is loose, but as the convex portion 38 is pushed to the right of the dovetail groove 35, the fitting relationship between the two is gradually tightened, and the pressing member 36 is pushed by the cam action of the inclined side surface of the dovetail groove. The jig body 31 is pushed upward. Therefore, when the convex portion 38 is completely pushed into the dovetail groove, the loose tube is strongly gripped by the loose tube holding grooves 34 and 37. At this time, the cutting edge of the cutter is cut into the jacket of the loose tube. The subsequent operation is the same as that of the first embodiment.

[0007]

[Effect]

 The above problems of the present invention are novel. Therefore, by solving this new problem, the core wire is not accidentally damaged by the cutter blade during the envelope tube removal work of the loose tube, and the envelope removal work can be performed safely. The ability to do this is an effect unique to the present invention. In the case of this optical fiber, the prevention of damage is not just a matter of improving the efficiency and safety of the fiber connection work. If the core wire is completely cut, it will be found at that time, so it can be repaired prior to the connection work (although this repair work is very troublesome), but in the case of damage that damages the surface, However, at that time, it is difficult to find it, so the connection work will be continued as it is, it will be found in the transmission test after the connection work is completed, or it will be broken at the damaged part when bent due to the decrease in strength of the damaged part It will be. According to the present invention, the above-mentioned damage can be surely prevented, so that the above-mentioned problem that the damage is found after the completion of the connection work and it is troublesome twice can be completely prevented. This is a very remarkable practical effect.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a perspective view of a main part of a jig body.

FIG. 4 is a perspective view of a second embodiment.

[Explanation of symbols]

 1, 31 ... Jig body 2, 36 ... Holding member 3 ... Tightening screw 4 ... Cutter insertion hole 5 ... Cutter 5a ... Screw 6 ... Press-rod insertion through hole 7, 33 ... Press rod 7a ... Press rod head 8 ... Leaf spring 10 ... Loose tube 32 ... Groove 34, 37 ... Loose tube holding groove 35 ... Dovetail groove 38 ... Convex parts

Claims (1)

[Scope of utility model registration request] 1. A through hole is provided on the upper surface of a jig body to which a cutting member such as a planer is attached, and a pressing member for pressing the loose tube from the rear surface is detachably attached, behind the cutter blade edge, and the through hole has a core. A loose tube jacket removal jig with a wire presser bar that can be moved up and down.