JPH0455284Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to an optical fiber stripper as a manual tool for removing a predetermined length of a coating layer from an end portion of a cored optical fiber.

(2) Prior art and its problems Optical fibers are connected by removing the coating layer at the terminal end, and various devices and methods for removing the coating layer have been provided. However, these are devices and methods that are implemented in factories, etc., and cannot be used as hand tools at work sites, nor can they be immediately used for optical fiber core wires.

Optical fiber strippers that have been put to practical use in optical fiber cores include U.S. Patent No. 3336666 and U.S. Pat.
Items related to No. 57-175104 can be seen. These strippers have a shape in which a gripping part and a handle intersect with each other via a pivot, and a pair of opposing blade parts are provided with a blade groove for cutting only the coating layer. In use, after inserting the optical fiber core into the blade groove of the saw tooth in the axial direction with the gripping part in the open position, the gripping part is moved to the gripping position by grasping the handle, and the blade groove is inserted into the blade groove. It was used to cut the coating layer.

Here, since the optical fiber core wire is too thin and the blade groove is correspondingly small, the operator cannot easily position the optical fiber core wire within the blade groove. Moreover, it requires a high degree of skill to visually confirm whether or not the positioning is done during actual work. As a result, not only is it inevitable to damage the strands of the optical fiber core wire, but also
This did not improve work efficiency on site.
In addition, the gripping part of the stripper and the handle are separated from each other via a pivot, and the optical fiber core must be inserted into the gripping part of the stripper substantially perpendicularly from the axial direction, making it difficult for the operator to was even more difficult to position.

Further, there is provided a device in which the optical fiber is inserted into the insertion hole from the axial direction thereof. However, since the insertion hole is extremely thin in accordance with the diameter of the optical fiber, it is difficult to insert the optical fiber in the axial direction, and there is a risk of breakage during the insertion process. As shown in Japanese Patent Application Laid-Open No. 155903/1983, a V-shaped groove was also provided, which had similar drawbacks.

(3) Purpose of the invention The present invention was devised in view of the above circumstances, and is a manual tool that can guide the optical fiber core to the center of the blade groove and is easy to operate. Its purpose is to provide the following.

(4) Features of the invention The features of the optical fiber stripper according to the invention are as follows:
At the center of the free end of the frame in the width direction, V-shaped grooves extending in the longitudinal direction of the frame are provided vertically and in alignment with each other, and blade grooves are provided in alignment with the V-shaped grooves. On one side in the width direction at the end, a plurality of trapezoidal portions are arranged at intervals in the length direction of the frame to form a gap into which the optical fiber core can be inserted from the radial direction in the open position, and the trapezoidal portion has the width. an inclined guide surface that is located closer to one side in the direction and guides the optical fiber between the ends; and the V
An inclined guide surface is provided extending from the groove side and positioned near the center in the width direction, and the optical fiber core inserted from the gap is provided on the other side of the free end of the frame in the width direction. A guide portion is provided that is stopped in contact with the V-shaped groove, and the guide portion is configured by a plurality of upper and lower guide pieces that are closed in the open position and arranged at intervals in the length direction of the frame, and the guide pieces are arranged in pairs at intervals in the length direction of the frame. It has a guide surface extending from the side,
This guide surface and the guide surface near the center in the width direction of the trapezoidal part guide the optical fiber core into the V-shaped groove and the blade groove corresponding thereto as the frame moves to the latching position. The reason is that a V-shaped guide groove is formed.

Hereinafter, the present invention will be explained based on the drawings.

(5) An embodiment of the invention The drawings show an embodiment of the optical fiber stripper according to the invention, in which Fig. 1 is a perspective view of the same in the open position, Fig. 2 is an exploded perspective view of the same, and Fig. 3 is an exploded perspective view of the same. A, B, and C are explanatory diagrams showing usage states.

An optical fiber stripper (hereinafter referred to as a stripper) 1 is composed of a pair of upper and lower frames 2 and 3, and the substrates of the frames 2 and 3 can be freely opened and closed to an open position X and a clamping position Y via a pivot 4. is facing. The opposing gripping portions 5 located at the free ends of the frames 2, 3 are provided with an opening portion 6, a guide portion 7, and blades 8, 8 as blades.

To be more specific, the frames 2 and 3 have elongated shapes that can be gripped, and have tapered finger hooks 9 on the outside of each frame.
9 are formed, and V-shaped grooves 10, 10 extending in the length direction of the frame are provided at the center in the width direction of each of the opposing gripping parts 5 so as to coincide with each other vertically, and these V-shaped grooves 10,
An opening part 6 and a guide part 7 are arranged in the length direction of the opposing gripping part 5 with 10 in between. The opening part 6 is located on one side in the width direction of the frames 2 and 3, and is composed of upper and lower trapezoidal parts 11, 11, into which the optical fiber core F can be inserted from the radial direction at the opening position X. The portion 11 includes an inclined guide surface 11a that is located toward one side in the width direction and guides the optical fiber between the two sides, and an inclined guide surface 11b that extends from the V-shaped groove side and is located toward the center in the width direction. is provided. Further, the guide portion 7 is located on the other side in the width direction of the frames 2 and 3, and is composed of upper and lower guide pieces 12, 12 that are closed at the open position X. The upper and lower guide pieces 12, 12 form a pair with the upper and lower guide pieces 12, 12 inserted in the opposite direction, and are adjacent to each other with receiving holes 13, 13 that allow entry of the respective guide pieces 12, 12.
Further, the guide piece 12 has a guide surface 12a extending from the V-shaped groove side to a length longer than the insertion interval. V that guides the optical fiber core F into the V-shaped groove 10 and the corresponding blade groove 8a as the frames 2 and 3 move to the clamping position.
A letter-shaped guide groove is formed. This guide groove is
are aligned with the grooves 10. The upper and lower guide pieces 12, 12 and the trapezoidal parts 11, 11 are connected to the opposing gripping part 5.
A plurality of pairs are spaced apart at the free end of and at spaced apart locations along its length.

The plurality of pairs of guide pieces 12 to 12 and the trapezoidal part 11
- 11 are provided with fitting holes 14, 14 extending in the vertical width direction of the frames 2, 3, respectively, and horizontal grooves 15 are provided on the outside of the frames 2, 3 intersecting with the fitting holes 14, 14. , 15 are provided, respectively. The blade 8 and the reinforcing plate 16 are fitted into the fitting hole 14 through the lateral groove 15, respectively. The holding groove 16a of the reinforcing plate 16 is configured in a cylindrical shape, and the blade 8
are aligned with the V-shaped groove 10 together with the blade groove 8a. Further, the horizontal grooves 15, 15 are formed in the frames 2, 3.
The protrusions 15a, 15a of the horizontal grooves 15, 15 are provided with the grooves 17a, 17a of the lids 17, 17, respectively.
17a is engaged. In the engaged position, the lateral groove 1
The protrusions 17b of the lid body 17 are male and female fitted into the recesses 15b of 5.

An elongated hole 20 extending in the length direction is bored in the intermediate portion of one of the frames 2, and a stopper 21 is attached to the elongated hole 20 so as to be movable in the length direction. On both sides of the elongated hole 20, there are scale display columns 2.
2 and a number display field 23 corresponding to this scale display field 22 are provided. Also, Stoppa 21
consists of a main part 24 installed over the edge of the elongated hole 20 and a skirt part 25 below the main part 24. Main part 24
is spaced apart from the pair of elastic neck pieces 24a, 24a, and curved knobs 24b, 24b are provided on the upper surfaces of the neck pieces 24a, 24a. Skirt part 2
Reference numeral 5 has a size that shields the space between the opposing frames 2 and 3 in the open position, and has a wall relief behind it, and a thick wall portion 26 is provided at a location corresponding to the V-shaped groove 10. There is.

Further, in the middle part of the frames 2 and 3, arms 3 are attached to each other.
0, 31 are provided protrudingly, and one arm 30 has an arc-shaped hole 32.
is drilled, and a protrusion 33 is bored in the other arm 31, and the frames 2, 3 are guided to the open position

Further, in front of the base ends of the frames 2 and 3, vertical holes 40 and 40 with bottoms are bored in the vertical direction from the opposing surfaces, respectively, and coil springs 41 are installed as springs in these vertical holes 40 and 40, and the frames 2 ，
3 to the open position X at all times. Furthermore, the bearings 42 and 43 of the pivot shaft 4 protrude from the base ends of the frames 2 and 3. The pivot shaft 4 has stop grooves 4a, 4a near both ends thereof, and the bearing 4
The retaining ring 4 is inserted into the retaining grooves 4a and 4a inserted into the retaining grooves 2 and 43.
4, 44 are provided and positioned. A bottomed horizontal hole 45 is bored in one of the bearings 42 from the other side of the frame 2, and a coil spring 46 as a spring is installed inside the horizontal hole 45 by inserting the pivot 4 therethrough. The coil spring 46 is compressed and constantly presses the frame 2 against the frame 3, thereby aligning the upper and lower V-shaped grooves 10, 10.

Next, the operation based on the above configuration will be explained.

As shown in FIGS. 1 and 3A, in the stripper 1, the frames 2 and 3 are always maintained at the open position X by the action of the coil spring 41. Further, the stopper 21 moves the knob 24b to a desired scale display field 22 in order to set the terminal length of the optical fiber core.

While remaining in the open position X, hang the fingers on the finger hooks 9, 9, and insert the optical fiber core F into the open part 6 from the radial direction. That is, the optical fiber core F is
It is inserted from between the trapezoidal parts 11 and 11, but when it comes into contact with any of the guide surfaces 11a, it is inserted between the trapezoid parts 11 and 11 through the guide surface 11a.

When further inserted in the radial direction, the optical fiber core F
is brought into contact with the guide pieces 12 to 12 and stopped. Since the plurality of pairs of guide pieces 12 to 12 are spaced apart, the optical fiber core F is connected to the V-shaped grooves 10 and 1.
It is stopped in parallel with 0. In the stopped state, the optical fiber F is pushed in its axial direction and pressed against the skirt portion 25 of the stopper 21 to set the end length of the coating layer.

When the finger hooks 9, 9 are pressed with fingers against the spring 41, the stripper 1 moves from the open position X to the gripping position Y. Along with this, the optical fiber core F is guided by each of the guide surfaces 12a to 12a of the guide pieces 12 to 12 and moves into the V-shaped groove 1.
0.10. The above guiding action is
is carried out in parallel to the axial direction of the optical fiber core F by a plurality of pairs of guide pieces 12 to 12,
It is now positioned in the V-shaped grooves 10, 10. The optical fiber core F is connected to the blade grooves 8a, 8a of the upper and lower blades 8, 8 and the reinforcing plates 16, 16, and the holding groove 1.
6a and 16a.

As shown in FIG.
The coating layer is cut by the blade grooves 8a, 8a of the blades 8, 8 while holding the coating layer.

After cutting, when the optical fiber core F is pulled out while maintaining the clamping position, only the coating layer at the end is removed by the reinforcing plate 16. When pulling out the blade 8, a bending force is applied to the blade 8, but the bending of the blade 8 is suppressed by the reinforcing plate 16.

According to the embodiment described above, firstly, by pressing the end of the optical fiber core F against the skirt portion 25, the end length can be accurately determined. As a result, there is an advantage that the terminal length of the optical fiber can always be kept constant, unlike the conventional method, which varies depending on the operator's visual inspection. Moreover, the terminal length can be freely adjusted by moving the stopper 21, and the scale display field 2
2 and the numerical display field 23, the adjustment amount can be immediately identified.

Second, the reinforcing plate 16 can suppress the deflection of the blade 8 during cutting, and the retaining groove 1
Since the coating layer near the cutting surface is pressed down by 6a, accurate cutting can be performed without eccentricity.

Thirdly, since the pivot shaft 4 is provided with a coil spring 46, no backlash occurs when the frames 2 and 3 are opened and closed, and the V-shaped grooves of the frames 2 and 3 are always
There is an advantage that 0 and 10 can be matched.

(6) Other embodiments of the invention In the above embodiment, the blades 8, 8 and reinforcing plates 16, 16 were provided on the opposing gripping part 5, but other holding plates, guide plates, etc. This does not preclude voluntary installation.

Although the guide pieces 12 to 12 are arranged at intervals in the above description, any number of guide pieces may be used as long as there are more than one.

(7) Effects of the invention As explained above, the optical fiber stripper according to the invention has the following effects.

The optical fiber can be easily inserted into the open part on one side in the width direction of the frame from the radial interval, and even if the optical fiber comes into contact with one side, the width of the trapezoidal part Since the optical fiber can be inserted into the gap using the inclined surface located on one side as a guide, the insertion work can be easily and reliably performed without requiring detailed confirmation when inserting the optical fiber from the radial direction.

In addition, when the optical fiber is inserted further in the radial direction after being inserted between the two ends, the optical fiber core comes into contact with the guide portion in the axial direction, so that the optical fiber can be inserted in an accurate position.
At this abutment position, the optical fiber core can be positioned on a guide surface that guides the optical fiber to the V-shaped groove and the corresponding blade groove.

Because the optical fiber core is located on the guide surface, simply grip the frame to the gripping position.
Since the core wire can be guided by the guide surfaces from above and below and transferred to the blade groove, there is no need for the conventional work of confirming the core position, and cutting work can be performed with high precision.

[Brief explanation of the drawing]

The drawings show an embodiment of the optical fiber stripper according to the present invention, in which Fig. 1 is a perspective view of the same in an open position, Fig. 2 is an exploded perspective view of the same, and Fig. 3 A, B, and C are in use. FIG. 1... Optical fiber stripper, 2, 3... Frame, 7... Guide portion, 8a... Blade groove, 10...
V-shaped groove, 11... Trapezoidal part, 11a... Guide surface closer to one side in the width direction, 11b... Guide surface closer to the center in the width direction, 12... Guide piece, 12a... Guide surface of the guide piece, X... ...open position, Y...bite position, F...
Optical fiber core.

Claims (1)

[Scope of Claim for Utility Model Registration] An optical fiber stripper in which a pair of upper and lower frames facing each other so as to be openable and closable at an open position and a clamping position are provided with a blade groove for cutting the end coating layer of an optical fiber core. In the frame, V-shaped grooves extending in the length direction of the frame are provided at the center in the width direction of the free end of the frame so as to coincide with each other vertically, and blade grooves are provided in alignment with the V-shaped grooves, and the blade grooves are provided in alignment with the V-shaped grooves. On one side in the width direction of the free end of the frame, a plurality of trapezoidal portions are arranged at intervals in the lengthwise direction of the frame, and the trapezoidal portions are arranged at a plurality of pairs in the lengthwise direction of the frame. is provided with an inclined guide surface that is located near one side in the width direction and guides the optical fiber core in the space, and an inclined guide surface that extends from the V-shaped groove side and is located near the center in the width direction. A guide portion is provided on the other side of the free end of the frame in the width direction, and the optical fiber core inserted from the space comes into contact with the guide portion, and the guide portion is closed at the open position. The guide piece is configured by arranging a plurality of guide pieces at intervals in the length direction of the frame, and the guide piece has a guide surface extending from the V-shaped groove side, and the guide piece and the center of the trapezoidal part in the width direction A V-shaped guide groove is formed by the adjacent guide surface to guide the optical fiber core to the V-shaped groove and the corresponding blade groove as the frame moves to the latching position. Optical fiber strips that are characterized by: