JPH10286778A - Nipper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a material to be cut with high accuracy with a constant size to a cut edge face, and to make a cut edge face perpendicular to an axis of the material to be cut, by mounting a constant size setting plate extended to a cutting edge of one side, and slidably kept into contact with the same, on the cutting edge of the other side. SOLUTION: The rear faces 10, 11 of the cutting edges 2A, 3A of a nipper are formed flush with each other, a knife edge 13 of one of the cutting edge 3A is a sharpened edge, and a knife edge 12 of the other cutting edge 2A has the shape of chopping-block perpendicular to the rear face 10. Further the cutting edge 2A comprises two constant size setting plates 7 removably fixed to the cutting rear face 10 along the edge 12. A point of an optical fiber is inserted from a side of the constant size setting plates 7, and a face of an edge EC to be cutted, of a coated material C is brought into contact with the constant size setting plates 7. The optical fiber F is cut when the grips of a nipper are gripped by applying the strength to a hand which holds the grips of the nipper, the length exposed from the cut edge EC of the coated material, becomes a predetermined size, and the cut edge face EF is perpendicular to the axis of the optical fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nipper for cutting a core material (hereinafter referred to as a material to be cut) of a coated wire obtained by coating a core material such as an optical fiber or an electric wire with a coating material.

[0002]

2. Description of the Related Art Generally, a cutting blade is used at one end as a nipper for cutting coated electric wires and coated optical fibers.
A pair of nipper bodies having a handle at the other end are connected to each other by a shaft so as to be relatively rotatable, and cut the coated electric wire / optical fiber by mutual contact between opposing cutting edges of the cutting blade.

Conventionally, when the connection end of the coated optical fiber F is cut, the dimension l between the tip of the coating material C and the tip of the optical fiber is, as shown in FIG.
Must be about 0.13 mm. In this cutting work, first, after stripping the covering material by a required length using a covered wire stripper or a nipper, a gauge plate is used so that the optical fiber protrudes only a required length (approximately 0.13 mm) using a nipper and only the end face of the covering material. Use to disconnect.

[0004]

However, in the above-mentioned prior art, the dimensions from the tip of the coating material to the tip of the optical fiber (cut end) are not constant due to the use of the gauge plate, so that the working efficiency is poor and the dimensional accuracy cannot be ensured. . In addition, since the cutting edges of the pair of cutting blades are double blades, the cut end surface of the optical fiber is not perpendicular to the axis, and the connection between the optical fiber and its connecting member (or the optical fibers) can be performed with high accuracy. It may not be possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and an object of the present invention is to cut a dimension from a leading end of a coating material to a cut end of a material to be cut uniformly and accurately. An object of the present invention is to provide a nipper that can make a cut end face of a material to be cut perpendicular to an axis of the material to be cut.

[0006]

According to the present invention, the following technical measures have been taken to solve the above-mentioned problems. That is, according to the present invention, the dimension from the tip of the coating material to the cutting position of the material to be cut by contacting the tip of the coating material with one of the cutting blades of the pair of nipper bodies for cutting the material to be cut coated with the coating material. (1) is provided with a sizing setting plate for setting.

In this case, a material to be cut (core material) from which at least one end of the covering material has been peeled in advance is inserted from a side of the fixed size setting plate between a pair of cutting blades of a nipper body having both cutting blades opened. Then, while the tip of the covering material is in contact with the fixed-size setting plate surface, the grip of the nipper body is operated to cut the material to be cut. At this time, the dimension from the coating material tip to the cut material cutting position is the same as the thickness of the fixed size setting plate, and the cut size of the cut material can always be constant and accurate, and the required dimensional accuracy is secured. be able to.

According to the present invention, a pair of nippers having a cutting blade at one end and a handle at the other end are connected to each other by a shaft so as to be relatively rotatable. A nipper adapted to cut a material to be cut, wherein one of the cutting blades is provided with a fixed size setting plate which extends to the other cutting blade and is in sliding contact therewith. ).

In this case, the positional relationship between the sizing plate attached to one side and the other cutting blade relatively moving is properly and reliably maintained, and the tip of the coating material is brought into contact with the sizing plate surface. When cutting the material to be cut, the dimension from the tip of the coating material to both cutting blades is set accurately, and the cutting dimensional accuracy of the material to be cut can be secured. In the present invention, the notch or the hole for inserting the cut material into the sizing plate may allow a part of the cutting edge of the cutting blade on the sizing plate mounting side to coincide with the notch or the hole edge. Alternatively, since it is provided so as to be able to peep, the material to be cut is positioned, and it is possible to cut accurately without being shifted in a direction parallel to the cutting edge (claim 3).

Further, according to the present invention, since the opening degree regulating member for regulating the opening degree with the other nipper body is provided on one side of the nipper body, the opening degree regulating member is provided when both cutting blades are open. The maximum degree of opening can be set so that the tip of the sizing plate does not separate from the side surface of the cutting blade that opposes, and the tip of the sizing plate can be prevented from hitting the cutting edge of the opposing cutting blade. (Claim 4).

Further, according to the present invention, since the cutting blades of the two nippers main bodies have the same surface on the side on which the sizing plate is mounted, the cutting end face of the material to be cut is aligned with the axis of the material to be cut. Can be cut at a right angle, and the cutting dimensional accuracy can be improved when the material to be cut is melted and connected like an optical fiber or the like (claim 5).

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show an embodiment of a nipper 1 according to the present invention, which is particularly suitable for cutting a coated optical fiber F. This nipper 1 has cutting blades 2A and 3A at one end (front end) and the other end (rear end).
Pair of left and right nipper bodies 2 having handles 2B and 3B
3, a pivoting portion 2C provided near the cutting blades 2A, 3A,
A shaft 4 that intersects and pivotally connects with each other at the center of 3C, a spring 5 that urges the handles 2B and 3B in the opening direction,
A fixed-size setting plate 7 fixed to the cutting blade 2A by screws 6;
It is constituted by an opening degree regulating member 9 fixed to the cutting blade 3A by a screw 8 and a nut 15. As shown in FIGS. 6 and 7, the cutting blades 2A and 3A of the nipper bodies 2 and 3 have the back surfaces 10 and 11 flush with each other, and the cutting edge 13 of one of the cutting blades 3A has a sharp cutting edge. The cutting edge 2 of the other cutting blade 2A is formed in a chopping plate shape perpendicular to the back surface 10, and the cut end face EF of the optical fiber F, which is the material to be cut, is perpendicular to the axis thereof ( FIG.
0).

The cutting blade 2A is provided with two threaded mounting holes 14 for the fixed size setting plate 7 along the cutting edge 12 so that the setting plate 7 uses the screw holes 14. And is detachably fixed to the cutting blade back surface 10. The fixed size setting plate 7 is made of a thin metal plate (having a thickness t of 0.13 mm). As shown in FIG. 8, the outer end 7A has a substantially rectangular shape having the same shape and the same size as the outer curved surface of the cutting blade 2A. , The cutting blade 2A
Two screw insertion holes 15 are provided in the length direction at intervals corresponding to the screw holes 14.

The sizing plate 7 includes a coated optical fiber F
From the cut end EC of the coating material C to the cut end face of the optical fiber (E
The dimension l (that is, the exposed length of the optical fiber) up to F) is set, and the dimension l is regulated by the plate thickness t. The tip 7B (end of the cutting blade 3A side) of the sizing setting plate 7 is set to have a width that is slidably in contact with the cutting blade 3A back surface 11 even when the cutting blades 2A, 3A are open.
From the center in the longitudinal direction of the tip 7B of the cutting blade 2A.
The cut-out member insertion notch 16 reaching up to 2 is provided.

The width W of the cutout portion 16 of the sizing plate 7 is set to be equal to or slightly larger than the diameter d of the optical fiber F.
The dimension l of the optical fiber F can be secured with high accuracy by making the surface abut on the opposite side edge of the cutout portion 16. Also, the tip 7B of the fixed size setting plate 7
Is the cutting blade 3A even when the cutting blades 2A and 3A are open.
By keeping it in contact with the back surface 11, it does not separate from the back surface 11 and does not contact the cutting edge 13 of the cutting blade 3 </ b> A.
Durability can be improved. In addition, it is possible to prevent a gap from being generated between the fixed size setting plate 7 and the cutting blade back surface 11 and to secure the dimension l of the optical fiber F.

The fixed size setting plate 7 is formed of a flat spring thin plate or the like, so that the tip 7B can be accurately and reliably maintained in sliding contact with the back surface 11 of the cutting blade 3A. It is possible, but as shown in FIGS.
Along the bending line L parallel to 2 and the cutting edge 2A at the tip 7B side
Is bent at a slight inclination angle θ to the back surface 10 side, the sliding contact of the tip 7B can be maintained more reliably.

The opening degree regulating member 9 is fixed to the nipper body 3 by means of the screw 8 and the nut 15 at a position outside the pivot portion 3C thereof. When the outside of the pivot portion 2C contacts the cutting blade 2, the cutting blades 2A and 3A do not open more than a predetermined opening degree. Due to the opening degree regulation by the opening degree regulating member 9, the tip 7B of the sizing plate 7 is moved to the cutting blade 3A.
It can be in a state of constantly contacting the back surface 11. The tip 8A of the screw 8 for fixing the regulating member 9 abuts on the opposing inner surface 2D of the nipper body 2, and the two cutting blades 2A,
The cutting edges 12, 13 of the 3A are slightly contacted or stop just before the contact, so that the cutting edges 13 are prevented from contacting the cutting edges 12 more than necessary and being damaged.

The cutting edges 2A, 3A of the cutting edges 12,
In FIG. 13, semicircular notches 17 and 18 are provided opposite to the shaft 4 so as to form insertion holes for the optical fiber F (or electric wires), as shown by two-dot chain lines in FIG. The coating material C can be peeled off. The cutting blade 2A of the nipper body 2 has a cutting edge 12A.
As shown in FIG. 11, the cutting edge EF of the optical fiber F, which is the material to be cut, can be sharpened in the same shape as the cutting edge 13 of the cutting blade 3A.
Can be perpendicular to the axis.

In the above embodiment, when cutting the optical fiber F, first, a stripping tool,
The end of the coating material C is peeled off by a required size by using a holed nipper or the notches 17 and 18 shown in FIG. 8 to expose the tip of the optical fiber F as the core material. Next, using the nipper 1 of the present invention, the hands holding the handles 2B and 3B are loosened to open the left and right cutting blades 2A and 3A. At this time, the notch 16 of the sizing plate 7 and the cutting edge 13 of the cutting blade 3 are kept in a state where the tip 7B of the sizing plate 7 is kept in contact with the back surface 11 of the cutting blade 3A by the opening degree regulating member 9. Thus, a long hole is formed as shown in FIG.

Therefore, the tip of the optical fiber F is inserted into the notch 16 of the sizing plate 7 and the back 1 of the cutting blades 2A, 3A.
0, 11 side, that is, from the fixed size setting plate 7 side (FIG. 6, FIG.
), And the cut end EC surface of the coating material C is brought into contact with the fixed size setting plate 7. At this time, the width W of the notch 16 of the sizing plate 7
However, since the diameter is only slightly larger than the diameter d of the optical fiber F, the coating material cut end EC surface inevitably hits, and the exposed length 1 of the optical fiber F (see FIG. 10) is set.

Next, the optical fiber F is cut by holding the grips 2B, 3B of the nipper 1 with force. The exposed length 1 of the optical fiber F from the coating material cut end EC is a set dimension (for example, 0.13 mm).
become. The cut end face EF of the optical fiber F is perpendicular to the optical fiber axis. According to the above-described embodiment of the present invention, the material to be cut such as the optical fiber F can be cut at a constant and accurate exposure length l from the coating material cut end EC, and the cut end face FE is aligned with the axis. And the cutting operation can be performed efficiently and without any skill.

Further, the thickness d of the core of the coated wire and / or
Depending on the required exposure length 1 from the cut end of the coating material, the thickness t of the sizing plate 7 or the width W of the cutout portion is selected and replaced, so that various sizes can be accommodated. The present invention is not limited to the above embodiment. For example, when the material to be cut is an electric wire or the like, the two cutting blades 2
The cutting edges 12 and 13 of A and 3A can be double-edged, and the notch 16 of the sizing plate 7 may be replaced with a round hole or a rectangular notch. A band plate without the notch 16 may be used, and the opening degree regulating member 9 may be another type if necessary. When a cut material insertion hole is provided in the fixed size setting plate 7 instead of the cutout portion 16, the cut hole 3 has a long hole extending in a direction perpendicular to the cutting edge, and a part of the cutting edge 13 of the cutting blade 3A coincides with the hole edge. It is desirable to do so or only to look slightly, so as not to hinder the cutting.

[0023]

As described above, according to the present invention, one cutting blade of a pair of nippers for cutting a material to be cut coated with a coating material is brought into contact with the tip of the coating material and covered from the tip of the coating material. Since the fixed size setting plate for setting the dimension of the cut material to the cutting position is provided, the dimension from the coating material tip to the cut material cutting position, that is, the exposed length of the cut material Can always be secured with a high degree of accuracy (claim 1).

According to the second aspect of the present invention, a pair of nipper bodies having a cutting blade at one end and a handle at the other end are provided.
A nipper that is relatively rotatably connected by a shaft, and is configured to cut a material to be cut by mutual contact between opposing cutting edges of the cutting blade, and to one of the cutting blades, to a cutting blade on the other side. It is characterized by the provision of a sizing plate that extends and slides to the right, so that the positional relationship between the sizing plate attached to one side and the other cutting blade that moves relatively is properly and reliably maintained. The dimensions from the tip of the covering material to both cutting blades can be set accurately, and the cutting dimensional accuracy of the material to be cut can be secured.

According to the third aspect of the present invention, the notch or hole for inserting the cut material into the sizing plate is formed by partially cutting the cutting edge of the cutting blade on the sizing plate mounting side. Since it is provided so as to be coincident with the edge of the portion or the hole or to be able to look through, the positioning of the material to be cut is easy and the accuracy can be secured. According to the fourth aspect of the present invention, since the opening degree regulating member that regulates the degree of opening with respect to the other nipper body is provided on one side of the nipper body, the state is such that both cutting blades are open. , The maximum opening can be set so that the tip of the sizing plate does not separate from the side of the cutting blade,
It is possible to prevent the leading end of the sizing plate from coming into contact with the cutting edge of the cutting blade facing it (claim 4).

According to the fifth aspect of the present invention, since the cutting blades of the two nippers main bodies have the same surface on the side where the sizing plate is mounted, the cutting end surface of the material to be cut is provided. Can be made perpendicular to the axis thereof, and when the material to be cut is an optical fiber, the connection between the optical fibers or the connection member can be performed appropriately and accurately.

[Brief description of the drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a rear view showing the cutting blade in an opened state according to the embodiment;

FIG. 5 is a top view of FIG. 1;

FIG. 6 is a sectional view taken along line AA of FIG. 1;

FIG. 7 is an enlarged view of a portion B in FIG. 6;

FIG. 8 is an enlarged front view of the sizing plate in the embodiment.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is an enlarged front view showing a connection example of a coated optical fiber.

FIG. 11 is an enlarged cross-sectional view of a main part showing another example of the cutting edge shape of the cutting blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nipper 2 Nipper main body 2A Cutting blade 2B Handle 3 Nipper main body 3A Cutting blade 3B Handle 4 Axis 7 Sizing setting plate 9 Opening degree regulating member 10 Back surface 11 Back surface 12 Cutting edge 13 Cutting edge 16 Notch for inserting cut material F Coated optical fiber ( Material to be cut) C Coating material

Claims (5)

[Claims] 1. A cutting blade of a pair of nippers for cutting a workpiece coated with a coating material is brought into contact with a tip of the coating material to set a dimension from the tip of the coating material to a cutting position of the workpiece. A nipper characterized by having a sizing plate. 2. A pair of nipper bodies having a cutting blade at one end and a handle at the other end are connected to each other by a shaft so as to be relatively rotatable, and by mutual contact between opposing cutting edges of the cutting blade,
A nipper adapted to cut a material to be cut, wherein one of the cutting blades is provided with a sizing plate extending to the other cutting blade and in sliding contact therewith. 3. A notch or a hole for inserting a material to be cut into the sizing plate, a part of a cutting edge of a cutting blade on a sizing plate mounting side is made to coincide with the edge of the notch or hole, or The nipper according to claim 1, wherein the nipper is provided so that it can be seen. 4. The nipper according to claim 1, wherein an opening degree regulating member for regulating the degree of opening with respect to the other nipper body is provided on one side of the nipper body. . 5. The nipper according to claim 1, wherein the cutting blades of the two nippers main bodies have the same surface on the side on which the fixed size setting plate is mounted.