JP2678540B2 - Multi-core split tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for dividing a multi-core optical fiber ribbon into a single core.

[0002]

2. Description of the Related Art 10 in FIG. 7 is a multi-core optical fiber ribbon. This is because a plurality of single-core optical fiber core wires 16 each having a primary coating 14 provided on the optical fiber 12 are arranged,
The secondary coating and the tertiary coating 18 are applied.

It is necessary to divide this end portion into the single-core optical fiber core wires 16 as shown in FIG. 8 so that they can be handled and connected individually. Therefore, conventionally, a method of tearing the optical fiber tape core wire by hand, tearing by a razor and then tearing by hand, etc. has been adopted.

[0004]

SUMMARY OF THE INVENTION The above method is very dangerous because it easily sticks to the fingertip when tearing the optical fiber core wire. In the other method, the razor may damage the primary coating and the optical fiber core wire, which may reduce the strength.

[0005]

In order to avoid the above danger, the following tools should be used for the work. As shown in FIGS. 1 to 4, this tool is composed of a lower grip portion 20 on which an optical fiber ribbon is placed and an upper grip portion 40 which overlaps the lower grip portion 20, and the optical fiber ribbon core of the lower grip portion 40. A projecting portion 30 having a convex curved surface 34 is formed at the center in the longitudinal direction of the portion 28 on which the wire is placed.
0 is provided with a blade 42 inclined forward and downward, a spring 48, and a roller 50. When the upper grip 40 is placed on the lower grip 20, the cutting edge of the blade is The curved surface 34 of the optical fiber ribbon 10 is mounted with the tape 44 on the tape ribbon mounting portion 28.
Bite into the secondary coating of the upper part, the spring 48 contacts the optical fiber ribbon 10 in front of the blade 42, and the roller 50 moves to the optical fiber ribbon 10 behind the protrusion 30. It comes to touch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a perspective view showing a vertically divided state in FIG. 3 and a state in which upper and lower grip portions are separated from each other in FIG. 20 shows the whole lower grip portion. Guides 24 and 26 are provided at the front and the rear of the upper surface (see arrow 22 for the front and rear), and between them is a portion 28 on which the optical fiber ribbon 10 is placed. This tape core wire mounting portion 28
The front part and the rear part are flat, but a protrusion 30 is formed in the center. This protrusion 30 is, for example, the front portion 3 of the upper surface.
2 is flat and the rear part has a convex curved surface 34. It should be noted that the convex curved surface means that the curve is not concave because it has a convex and a concave.

Reference numeral 40 denotes the entire upper grip portion. Reference numeral 42 denotes a blade, which is attached to the inside of the upper grip portion 40 while being inclined forward and downward. When the upper grip portion 40 is superposed on the lower grip portion 20, the cutting edge 44 thereof is positioned on the curved surface 34 of the projecting portion 30. In front of the blade 42, an escape hole 46 that vertically penetrates the upper grip portion 40 is provided. Also,
A plate-shaped spring 48 is provided in front of the blade 42. When the upper grip portion 40 is overlaid on the lower grip portion 20, the tip of the upper grip portion 40 is located on the flat front portion 32 of the protruding portion 30. Further, a roller 50 is provided behind the blade 42.
When the upper grip portion 40 is placed on the lower grip portion 20, the upper grip portion 40 is located on the flat portion of the tape core wire placing portion 28 behind the protruding portion 30.

[0008]

[Operation] (1) As shown in FIG. 1 (a), the optical fiber tape core wire 10 is attached to the tape core wire placement portion 28 of the lower grip 20.
Set it on the upper side, and press it from above with the upper grip portion 40. (2) Then, the optical fiber ribbon 10 is pressed by the spring 48 and the roller 50 onto the projecting portion 30 to be in close contact therewith, and the optical fiber ribbon 10 is curved along the curved surface 34. In the curved portion of the optical fiber ribbon 10, the blade 42
The cutting edge 44 of the blade cuts into the secondary coating (so that the blade 42
Position has been adjusted).

(3) As shown in FIG. 1 (b), pull the tool forward. Then, one side of the secondary coating and the tertiary coating 18 of the optical fiber ribbon 10 is cut like the case of cutting a plate with a planer, and the scraped secondary coating and the tertiary coating 18 become a tape shape. It is taken out from the escape hole 46.

(4) FIG. 5 shows a state in which the secondary coating and the tertiary coating 18 are removed on only one side. When the opposite side is processed in the same manner as above, the result becomes as shown in FIG. 6 and the connection between the cores is weakened, so that the optical fiber cores 16 of each single core can be simply divided thereafter.

[0011]

EFFECTS OF THE INVENTION (1) Since the blade is mounted so as to be inclined downward to the front, the force for pulling the tool can be small, the position of the blade can be easily adjusted, and the secondary coating and the tertiary coating 18 can be scraped. The debris becomes a tape and becomes easy to handle. (2) Since the secondary coating and the tertiary coating 18 are shaved as described above, if the optical fiber ribbon 10 is lifted up even a little, the primary coating of the single-core optical fiber 16 may be damaged. However, the optical fiber ribbon 10 is pressed against the projecting portion 30 by the spring 48 and the roller 50 so as to come into close contact with it and become curved along the curved surface 34, and the cutting edge enters the curved portion and scrapes. So, the optical fiber tape core wire 1
Lifting of 0 is completely prevented. Therefore, there is no fear of damaging the optical fiber or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a usage situation in an embodiment of the present invention,
(A) shows the state immediately before the start of cutting the coating, and (b) shows the state during cutting.

FIG. 2 is a perspective view of a tool according to an embodiment of the present invention.

FIG. 3 is a vertical sectional side view of a tool according to an embodiment of the present invention.

FIG. 4 is a lower grip portion 20 of a tool according to an embodiment of the present invention.
Explanatory drawing of the state which isolate | separated and the upper side holding part 40.

FIG. 5 is an explanatory diagram of an optical fiber ribbon which is processed on only one side in the embodiment of the present invention.

FIG. 6 is an explanatory view of the optical fiber ribbon which has been processed in the embodiment of the present invention.

FIG. 7 is an explanatory view of an optical fiber ribbon.

FIG. 8 is an explanatory diagram of the optical fiber tape core wire with the coating on the end removed.

[Explanation of symbols]

 10 optical fiber tape core wire 12 optical fiber 14 primary coating 16 single-core optical fiber core wire 18 secondary coating and tertiary coating 20 lower grip portion 24, 26 guide 28 tape core wire mounting portion 30 projecting portion 32 front portion 34 curved surface 40 upper grip 42 blade 44 blade edge 46 escape hole 48 spring 50 roller

Claims (1)

(57) [Claims] 1. A lower grip portion for mounting an optical fiber ribbon, and an upper grip portion overlapping the lower grip portion, and a portion of the lower grip portion for mounting the optical fiber ribbon in a longitudinal direction. A protrusion with a convex curved surface is formed in the center,
The upper grip portion is provided with a blade inclined forward and downward, a spring, and a roller. When the upper grip portion is placed on the lower grip portion, the blade edge of the blade is the tape. The optical fiber tape core to be placed on the core wire mounting portion bites into the secondary coating of the portion on the curved surface, the spring contacts the optical fiber tape core wire in front of the blade, and the roller A multi-core splitting tool adapted to come into contact with the optical fiber tape core wire behind the protruding portion.