JP2002176713A - Takeout implement for sheath tearing cord of cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely take out a sheath tearing cord without flawing a cable core wire. SOLUTION: A cable main unit 51 is formed in its sheath 59 with a tearing cord coating part 55 containing a sheath tearing cord 56 getting thick outside of a cable. A cutting blade, hollowly sinking abutting surfaces 11a, 12a between a cover unit 11 openable by a hinge plate 13 and a main unit 12 to be formed with a cable insertion port 3 for inserting a cable 5 additionally to protrude a tip end to a semicircular opening part 33 inserting the tearing cord coating part 55 of the cable insertion port 3, is provided in a take out implement 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a take-out device for taking out a tear cord of a cable.

[0002]

2. Description of the Related Art FIG. 8 shows an example of an optical fiber cable 5, in which a large number of optical fiber core wires 57 are passed through a cable body 51 surrounded by a buffer material. The cable main body 51 is suspended and supported on the support wire portion 52 by a connecting portion 53 in which a part of the jacket 59 extends at intervals in the longitudinal direction, and a plurality of wires 58 are provided in the support wire portion 52. It is buried. In the outer sheath 59 of the cable main body 51, outer sheath tearing strings 56 are embedded at both sides, and in the portion where the outer sheath tearing strings 56 are embedded, the outer sheath 59 bulges in an arc shape and is torn. The string covering portion 55 is provided. If it is necessary to branch the optical fiber core wire 57 in the middle, the tear cord covering portion 55 is cut off, the sheath tear cord 56 is taken out, and this is pulled out using a tool or the like, so that the cable main body 51 is pulled out. Cut the optical fiber core wire 57 to the required length.
Has been taken out.

[0003]

By the way, the cutting of the conventional tear-string covering portion 55 is performed using a knife or the like on site, but the cutting of the relatively hard covering portion 55 requires time and effort. At the same time, a knife or the like may be cut into the cable main body 51 with excessive force, and the optical fiber core wire 57 may be damaged.

Accordingly, the present invention has been made to solve such a problem, and provides a cable sheath and tear strip removal tool which can easily and reliably take out the sheath tear string without damaging the cable core wire. The purpose is to:

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a tear strip (56) is embedded in a cable jacket (59) and a tear string (5) is placed.
The cover (11) and the main body of the cable (5) having the tear-string covering portion (55) bulging outward from the cable (6). (12) is provided, these abutment surfaces (11a, 12a) are recessed to form a cable insertion port (3) for inserting the cable (5), and a cutout of the cable insertion port (3). The part (3
The cutting blade (4) is disposed with the tip protruding in 3). In the first aspect of the present invention, the cover and the main body are opened, and the cable is placed in the cable insertion port so that the cut string covering portion is located at a predetermined portion of the insertion port, and the cable is taken out while closing the lid and the main body. As the tool is moved in the longitudinal direction of the cable, the cutting blade cuts into the tearstring coating and separates it from the cable, exposing the tearstring. If the amount of protrusion of the cutting blade is set appropriately, only the tear string covering portion is cut off from the cable, and the core wire in the cable is not damaged. The use of such a take-out tool allows any number of people to easily and surely take out the tear cord, and also ensures the safety of the work because the cutting edge of the cutting blade is not exposed to the outside during use.

According to a second aspect of the present invention, there is provided the tool for removing a cable tear of the cable according to the first aspect of the invention, wherein the main body (12) comprises a base (21) and a blade holder (22). The cutting blade (4) is sandwiched between (21) and the blade holder (22), and the cutting blade (4) is inclined to a portion of the cable insertion opening (3) through which the tear string covering portion (55) passes. Protrude in posture. In the second aspect of the present invention, the cutting blade can be easily installed or replaced, and the cutting blade provided in the inclined posture can smoothly penetrate the tear-string covering portion.

According to a third aspect of the present invention, in the tool for removing a sheath tear cord of the cable according to the second aspect of the present invention, the base (21) located below the cutting blade (4) inclined toward the base (21). A groove (24) is formed in the portion ()) for discharging the tear-string covering portion (55) cut from the cable (5) by the cutting blade (4). In the third aspect of the present invention, it is possible to efficiently discharge the cut string covering portion cut off from the cable to the outside of the extraction tool, and the operation of the extraction tool becomes easy.

[0008] The reference numerals in parentheses indicate the correspondence with specific means described in the embodiments described later.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an appearance of a tool 1 for removing a tear cord. The removal tool 1 is a substantially rectangular block, and is divided into an upper half lid 11 and a lower half main body 12, and these lids 11 and the main body 12 have front ends (right ends in FIG. 2) whose sides are mutually separated. The lid 11 is connected by a hinge plate 13 so that the lid 11 can be pivotally opened upward as shown by a chain line in FIG. The main body 12 includes a first half base 21 and a second half blade holder 22. The second half of the base 21 is inclined downward in a side view (FIG. 2), and is substantially trapezoidal on a slope 21a in a side view. The blade holder 22 is connected by bolts 23,
The upper surface of the blade holder 22 and the upper surface of the base 21 are positioned at the same height to form an upper surface 12a which is an abutting surface of the main body 12.

As shown in FIG. 1, a cable insertion opening 3 is formed in the take-out device 1 so as to penetrate the take-out device 1 in the front-rear direction. The cable insertion port 3 is a contact surface 1 between the lid 11 and the main body 12.
As shown in FIG. 3, the cable insertion opening 3 is formed in the front half of the unloading tool 1 so that the cable main body 51 (FIG. 8) can be inserted through the cable main body 1 (FIG. 8). In the part 31, the semicircular parts 32, 3
3, and rectangular portions 34, 35 at the left and right positions are added. The size of the semicircular portions 32 and 33 is slightly larger than the cross-sectional shape of the tear-string covering portion 55 protrudingly formed on both sides of the cable main body 51. Further, the rectangular portions 33 and 34 are formed by cutting the connecting portion 53 when the connecting portion 53 is cut off at an appropriate length so that the take-out tool can be used for the cable 5 having the continuous connecting portion 53. It is large enough to insert the rest.

As shown in FIG. 4, the upper half of the cable insertion port 3 has the same shape as the front half of the insertion port 3 in the latter half of the removal tool 1, while the lower half has the front half of the insertion port 3. There is no lower semicircular portion 33 (FIG. 3), and the opening width is a large rectangular portion 36 exceeding the left and right rectangular portions 34, 35.
As shown in FIG. 5, a plate-like cutting blade 4 is disposed in the take-out device 1 at a central position in the front-rear direction with a tip protruding a predetermined amount into the cable insertion opening 3 in an inclined posture. The base 2
A groove 24 having a rectangular cross section (FIG. 5) is formed in the center of the inclined rear half portion and is opened downward, and the left and right side walls (the front side and the rear side in FIG. 5) of the groove 24 are directed upward. The lower surfaces of both side edges of the cutting blade 4 are placed on the receiving portion 241 extended to the side. Above the cutting blade 4, a blade presser 22 is provided.
And its slope 22 a is in contact with the plate surface of the cutting blade 4, and holds the cutting blade 4 with the receiving portion 241.

When the take-out device 1 having such a structure is used, the cover 11 is opened as shown by a chain line in FIG.
And the lid 11 is closed so that the cable body 51 is sandwiched between the cable body 51 and the main body 12. At this time, since the tip of the cutting blade 4 protrudes into the cable insertion opening 3 in the lower semicircular portion 33 (FIG. 6), the cover 11 is not completely closed. Then, lid 1
When the take-out device 1 is moved forward while holding the device 1 in the closing direction, the cable 5 relatively moves rearward in the take-out device 1 (arrow in FIG. 7), and the cut exposed in the cable insertion opening 3 is cut. The blade 4 gradually cuts into the tear-string covering portion 54, and separates the tear-string covering portion 54 moving in the semicircular portion 33 from the cable main body 51 as shown in FIG. To expose.

In this case, the semicircular portion 33 of the cable insertion port 3
Is substantially equal to the height of the tear-string covering portion 54, only the tear-string covering portion 54 is cut off from the cable body 51 along the line L in FIG. As a result, the sheath tear string 56 is exposed, and the core wire 57 in the cable main body 51 is not damaged. In addition, the cut | disconnected tear string covering part 54 passes through the inside of the groove part 24 (FIG. 7) of the removal tool 1, and is discharged | emitted below (FIG. 1). After exposing the sheath tear string 56 by a required length, the tear string 56 is pulled to cut the sheath of the cable body 51 in the longitudinal direction, and a necessary core wire 57 is taken out.

In the above embodiment, the support wire 52
Although the cable 5 has the configuration shown in FIG. 8, the present invention can of course be applied to a cable having no support wire. Further, although the cable 5 having the tear string covering portion 55 on both sides of the cable main body 51 has been described, a cable having a tear string covering portion on only one side may be used.

[0015]

As described above, according to the tool for removing a sheath of a cable according to the present invention, the sheath of the cable is easily and reliably cut off without damaging the core of the cable. You can take out the string.

[Brief description of the drawings]

FIG. 1 is a perspective view of a removal tool.

FIG. 2 is a side view of the removal tool viewed from a direction A in FIG.

FIG. 3 is a front view of the removal tool as viewed from a direction B in FIG. 1;

FIG. 4 is a front view of the removal tool as viewed from a direction C in FIG. 1;

5 is a longitudinal sectional view of the removal tool taken along line VV of FIG.

FIG. 6 is an enlarged view of a cable insertion opening.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a cutaway perspective view showing an example of a cable.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Take-out tool, 11 ... Lid body, 11a ... Butting surface, 12 ... Body, 12a ... Butting surface, 21 ... Substrate, 22 ... Blade holder, 2
DESCRIPTION OF SYMBOLS 4 ... Groove part, 3 ... Cable insertion opening, 33 ... Semicircle part, 4 ... Cutting blade, 5 ... Cable, 51 ... Cable body, 55 ... Tear string covering part, 56 ... Skin tear string, 59 ... Outside of cable Covered.

Claims (3)

[Claims] 1. The cable tearing of a cable in which a cable tearing cord is buried in a cable jacket and formed with a cable tearing covering portion which covers the cable tearing cord and bulges outward from the cable. In the cord removing device, a cover body and a main body that can be opened are provided, and these abutting surfaces are recessed to form a cable insertion port for inserting the cable, and the tear is formed in the cable insertion port. A cable strip tearing tool, wherein a cutting blade is provided with a tip protruding from a portion through which a string covering portion passes. 2. The tool according to claim 1, wherein the body is constituted by a base and a blade retainer, and the cutting blade is held between the substrate and the blade retainer. And a stripping cord removing tool for a cable in which the cutting blade is projected in an inclined position at a portion through which the tearing string covering portion passes. 3. A tool for removing a tear cord of a cable according to claim 2, wherein a portion of the base located below the cutting blade inclined toward the base is cut off from the cable by the cutting blade. And a tool for removing a tear cord of a cable having a groove for discharging the tear cord covering part.