JPH06174939A - Peeling tool for slot membe - Google Patents

Abstract

PURPOSE:To facilitate a peeling operation by stepwise cutting a slot member at the time of peeling the slot member of a fiber cable. CONSTITUTION:A moving side clamping haudle 26 is freely turnably mounted to a stationary side clamping handle 11. A blade 16 is mounted freely frictionally rotatably with a revolving axis 20 to this stationary side clamping haudle 11. A projecting part 27 for positioning is formed on the rear end of a blade 16 and a cutting edge 24 is disposed to face a slot member holding part 13. One end of a detaining lever 32 is freely rotatably mounted to the moving side clamping haudle 26. This detaining lever 32 is provided with first to third recessed parts 36 to 38 for engaging. One end side of a connecting plate 40 is freely rotatably connected to the detaining member 32 and the connecting pin 42 of the connecting plate 40 is fitted into a loose hole 25 of the blade 16. The opening degree of the cutting edge 24 is maximized when the projecting part 27 for positioning is engaged with the first recessed parts 36 for engaging. The cutting depth of the cutting edge 24 is successively increased stepwise by selectively engaging the projecting part 27 for positioning automatically by each to the rear side recessed parts 37, 38 for engaging every time the lancing operation of the clamping part 29 is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slotting machine for exposing a tension member of a core material by peeling a plastic coating material of the slot when connecting an optical cable.

[0002]

2. Description of the Related Art As shown in FIG. 4, optical cables 1a, 1
Reference numeral b denotes a slot 4 formed by coating a core material 2 of carbon fiber or a metal wire with a plastic coating material 3 as a tensile material, and a plurality of gradual spiral grooves 5 formed on the surface of the slot 4. A plurality of multifilamentary optical fiber cores 6 in a tape shape are housed therein, a holding winding tape 7 is wound on the upper side thereof, and a plastic sheath material 8 is further coated on the tape.

When connecting the optical cables 1a and 1b of this type, the sheath material 8 and the press-winding tape 7 are peeled off, the covering material 3 of the slot 4 is peeled off, and the core material 2 is exposed. After the core material 2 is attached and fixed to the closure 10, the multi-core optical fiber core 6 on the optical cable 1a side and the multi-core optical fiber core 6 on the optical cable 1b side
And are connected.

In the work of exposing the core material 2 of the optical cables 1a and 1b, a scissor-shaped cutter is used to sandwich the end portion side of the slot 4 and a cut is made all at once to the portion of the core material 2 and the covering material 3 is peeled off. It was done by.

[0005]

However, in order to make a deep cut in the slot 4 near the core material 2 at a stretch, a very large force is required, and the work of finding out becomes very heavy work, which is impossible for the worker. There was a problem of imposing a burden.

Also, when making a cut with a scissor-shaped cutter, it is difficult to control the force, and if too much force is applied, the blade of the cutter will hit the core material 2 strongly and the core material 2 and the blade of the cutter will be damaged. There was a problem.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to easily carry out the work of putting out the work without forcing the worker to perform heavy labor, and to make the blade core material. An object of the present invention is to provide a slotting machine in which the core material and the blade are not damaged by hitting.

[0008]

In order to achieve the above object, the present invention is constructed as follows. That is, in the slot feeder of the present invention, a slot holding portion for holding the slot is formed on the tip side of the fixed side grip body, and the movable side grip body is rotatably attached to the fixed side grip body. A blade body is attached to the fixed-side grip body so as to be frictionally rotatable, a cutting edge formed on the front side of the blade body is arranged to face the slot holding portion, and a positioning protrusion is movable on the rear side of the blade body. It is provided so as to project toward the side gripping body side, and a locking plate is rotatably attached to the movable side gripping body by being biased by a biasing means in the direction of rotation of the blade body toward the positioning projection part. When a plurality of engaging recesses are formed in an array in the front-rear direction on the surface side of the stop plate facing the positioning projection of the blade, when the positioning projection is locked in the frontmost engaging recess of the engaging recess. The maximum opening of the cutting edge with respect to the slot holding part. The locking plate is attached when the positioning projection of the blade comes out of the engagement recess of the mating partner every time the movable gripping body is rotated to the fixed gripping body side to make a cut and then the rotation is returned. The urging force of the urging means rotates toward the positioning protrusion and sequentially switches and engages the engaging recesses on the rear side to gradually reduce the opening degree of the cutting edge. Further, the slot holding portion is characterized by having a first holding surface for holding the slot vertically and a second holding surface for holding the slot horizontally.

[0009]

In the present invention having the above-described structure, the slot is vertically held by the second holding surface, and the movable side gripping body is cut into the fixed side gripping body side and rotated. To be Next, by applying the slot to the first holding surface of the slot holding portion sideways, and cutting and rotating the movable side gripping body toward the fixed side gripping body,
A cut is made in the dressing of the slot. In this state, when the movable side gripping body is returned to the original position by rotation, the positioning protrusion of the blade body comes out of the engaging concave part engaged at the time of cutting the locking plate on the movable side gripping body side, and Engages with the engaging recesses adjacent to the rear of the blade, and the opening degree of the cutting edge of the blade with respect to the slot holding portion is reduced. In this state, when the movable side gripping body is again cut and rotated toward the fixed side gripping body, the slot is further cut to reach the changed small opening degree. In this way, each time the cutting operation of the movable side gripping body is repeated, the cut is made deeper in stages, and after the cut is made to the optimum depth position of the slot, the covering material of the slot is peeled off and exposed. It

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an embodiment of a slot feeder according to the present invention. In the figure, the fixed side gripping body 11 has a gripping part 12 on the latter half side and a slot holding part 13 on the tip side, and the slot holding part 13 has a concave surface matching the outer diameter of the slot 4. A first holding surface 14 is formed, and the tip side of the first holding surface 14 is shown in FIG.
As shown in (b) of FIG. 7, a concave second holding surface 15 is formed which is fitted when the slot 4 is supported in the vertical direction.

A blade body 16 is rotatably attached to the shoulder portion of the fixed side grip body 11. FIG. 2 (a) shows the details of this mounting state. A rotary shaft 20 is inserted and fixed between both side surfaces 17 and 18 of the fixed side gripping body 11 having a U-shaped cross section. A blade body 16 is rotatably fitted in the 20. The blade body 16 is interposed between the side surface 17 and the spring bearing 21 on the side surface 18, and the spring bearing 21 is provided with a spring accommodating portion 22, and the spring accommodating portion 22 accommodates the compression spring 23. The blade 16 is pressed against the side surface 17 by the elastic restoring force of the compression spring 23 and is rotated by frictional sliding.

The front side of the blade 16 is a cutting edge 24,
The cutting edge 24 faces the slot holding portion 13. Blade
An elongated hole-shaped play hole 25 is formed on the rear half of the blade 16, and a positioning protrusion 27 is formed on the rear end of the blade 16 so as to project toward the movable-side gripping body 26.

The movable-side gripping body 26 also has a U-shaped cross section, and the slot-holding portion 13 has the U-shaped wall surfaces on both sides.
The front end side of the movable side gripping body 26 is rotatably attached to the fixed side gripping body 11 by a shaft portion 28 such as a screw or a pin with the back head portion sandwiched therebetween. A restoring spring 30 is fitted in the shaft portion 28. One end side of the restoring spring 30 is locked to the fixed side grip body 11 and the other end side is locked to the movable side grip body 26. Due to the elastic restoring force of 30, the movable gripping body 26 is always urged in the direction to open the movable gripping body 26, that is, in the counterclockwise direction in FIG.

Further, the movable side gripping body 26 is provided with a rotary support shaft 31 composed of screws, pins or the like slightly rearward of the shaft portion 28, and the tip end side of the locking lever 32 is attached to the rotary support shaft 31. It is rotatably fitted. The locking lever 32 is provided with a rotation restricting portion 33. The rotation restricting portion 33 is locked by a stopper shaft 34 fixed to the movable side gripping body 26 and exceeds a certain limit in the clockwise direction. The locking lever 32 is prevented from rotating. An urging spring 35 is attached to the rotation support shaft 31, and one end of the urging spring 35 is attached to the stopper shaft 34.
And the other end side is locked to the locking lever 32, and the locking lever 32 is constantly urged toward the positioning protrusion 27 side of the blade body 16, that is, in the clockwise direction.

The engaging lever 32 has a first engaging recess 36, a second engaging recess 37, and a third engaging recess 38 on the surface facing the blade body 16 from the front side to the rear side. The blades 16 are arranged in order, and the opening degree between the cutting edge 24 and the slot holding portion 13 is maximized at the position where the positioning protrusion 27 of the blade body 16 engages with the first engagement recess 36, and the positioning protrusion is formed. At the position where 27 is engaged with the second engaging recess 37, the degree of opening is medium and the positioning protrusion is
At the position where 27 is engaged with the third engagement recess 38, the opening degree between the cutting edge 24 and the slot holding portion 13 becomes the minimum, and the slot 4 is held on the first holding surface 14 with this minimum opening degree. When the cut is made by cutting, the cut is made to a position near the core material 2.

One end of a connecting plate 40 is rotatably connected to the locking lever 32 by a pin 41. An operating pin 42 is provided on the other end side of the connecting plate 40.
Is inserted into the play hole 25 of the blade body 16 so as to be free to move.

A stop ring 43 is rotatably attached to the rear end of the grip portion 29 of the movable grip body 26, while a stop recess 44 is provided in the grip portion 12 of the fixed grip body 11. Therefore, when the apparatus is not used, the retaining ring 43 is retained in the retaining recess 44, and the movable side gripping body 26 is stored in a closed state. Further, a locking surface 45 is formed on the fixed-side grip body 11 and a protruding surface 46 is formed on the movable-side grip body 26. When the grip portion 29 is rotated clockwise, the protruding surface is at the final position of rotation. 46 is locked to the locking surface 45 to stop rotation.

This embodiment is constructed as described above,
Next, the lead-out operation of the slot 4 will be described. First, when the grips 12 and 29 of the fixed-side gripping body 11 and the movable-side gripping body 26 are held and pulled to one side, for example, the gripping section 29 is pulled and rotated, the locking lever 32 is rotated clockwise by the stopper shaft 34. Since the rotation is blocked, the connecting plate 40 is pulled toward the moving direction of the gripping portion 29 via the locking lever 32, and as a result, this pulling movement is transmitted to the blade body 16 via the operation pin 42, and As a result, the blade body 16 rotates counterclockwise about the rotary shaft 20 as a fulcrum, and the positioning protrusion 27 causes the third engagement recess 38.
From the side toward the first engaging recess 36 side in sequence, and the positioning protrusion 27 faces the position of the engaging recess corresponding to the cutting depth of the cutting edge 24, for example, the second position. The opening degree of the cutting edge 24 is set to a medium opening degree by adjusting the position so as to face the engagement recess 37. In this state, the end portion of the slot 4 is vertically applied to the second holding surface 15 as shown in FIG. A vertical cut is made at a depth corresponding to the opening degree of the cutting edge 24.

After making several vertical cuts,
As shown in FIG. 3A, the slot 4 is turned sideways with the positioning projection 27 facing the first engagement recess 36, that is, with the opening degree of the cutting edge 24 set to the maximum. Then, the operating pin 42 is engaged with the engaging surface 25a of the play hole 25 by applying the pressing force to the blade body 16 by applying the pressing force to the first holding surface 14 and rotating by cutting in the direction to close the grip portion 29. For this purpose, the blade body 16 rotates in the clockwise direction with the rotary shaft 20 as the fulcrum, and the shallow notch corresponding to the maximum opening degree of the cutting edge is made in the slot 4 in the lateral direction.

Next, when the cutting force is released, the grip 29
Is returned to rotate in the opening direction by the elastic restoring force of the restoring spring 30. At the time of this return, when the positioning protrusion 27 engages with the first engagement recess 36 and a cut is made, the cutting rotation of the blade body 16 is performed, so that the first engagement recess before cutting is performed. It is on the rear side of the engagement position with 36, and at this position, even if the grip portion 29 returns to rotation, the blade body 16 is compressed by the compression spring.
Since the position is maintained as it is by the compressive frictional force of 23, the gripping part 29 is returned to rotate, so that the positioning projection part
27 gradually slips out of the first engagement recess 36 (at this time, the locking lever 32 is biased toward the projection 27 by the biasing spring 35, so that the projection 27 becomes the first engagement recess 36). When the gripping portion 29 comes out of the first engaging concave portion 36 immediately before the grip portion 29 completely returns to the original position, the positioning protrusion 27 is moved backward by the urging force of the urging spring 35. The second engaging recess 37 enters the second engaging recess 37 and is brought into an engagement state with the second engaging recess 37.

Then, in this engaged state, the gripping portion 29 is again rotated and moved in the cutting direction, whereby the positioning projection portion
As a result of the 27 being pushed by the second engaging recess 37, the blade body 16 makes a notch rotation in the clockwise direction, and the notch is further made in the slot 4. Then, when the grip portion 29 is again returned to rotate in the opening direction, the positioning projection 27 comes out of the second engagement concave portion 37, and as shown in FIG. The opening degree of the cutting edge 24 is switched to the minimum opening degree by engaging with the recess 38. Next, the cutting operation is performed again by the grip portion 29, so that the cutting is made in the slot 4 until the cutting blade 24 reaches the minimum opening degree. By this final cut, a cut is made up to the vicinity of the core material 2 of the slot 4, and the cut covering material 3 is easily peeled off to be in a protruding state.

As described above, in this embodiment, the cutting depth of the cutting edge 24 is gradually increased every time the cutting operation is repeated by the gripping portion 29. As compared with the case of inserting all at once, the cutting force can be reduced, and the work of exposing the slot 4 can be performed by light labor.

Further, in this embodiment, the slot holding portion 13 is provided with the second holding surface 15 for making a vertical cut in the slot 4 and the first holding surface 14 for making a horizontal cut. Further, it becomes easy to perform the cutting operation in the vertical direction and the horizontal direction, and it is possible to improve the efficiency of the slot opening operation.

Further, as described above, since the cuts are made in the slots 4 step by step, when the final cut is made, the cutting edge 24 strongly hits the core material 2 of the slots 4 and the core material is made. The problem of damaging the cutting edge 24 and the cutting edge 24 is eliminated, the reliability of the slot opening operation can be improved, and the life of the cutting edge 24 can be extended.

The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, in the above embodiment, the first holding surface 14 and the second holding surface 15 are provided side by side with the slot holding portion 13 of the fixed-side grip body 11, but the second holding surface
15 may be omitted.

In addition, in the present embodiment, the cutting of the cutting edge 24 is configured to be variable in three steps.
Alternatively, it is possible to switch to any number of stages, such as four stages or more, according to the specifications. In this case, the engaging lever is formed with as many engaging recesses as the number of switching steps.

[0027]

According to the present invention, the cutting depth is increased stepwise every time the cutting operation is performed. Therefore, the cutting force is greater than the conventional method of making the maximum cutting from the beginning. Can be small, which allows the slot to be easily exposed.

Further, by setting the maximum (final) cutting position to be in the vicinity of the core material, there is no problem that the cutting edge strongly hits the core material of the slot to damage the core material or the cutting edge. It is possible to improve the reliability of the slot opening operation and to extend the life of the cutting edge.

Further, in the case where the slot holding portion is provided with the first holding surface for holding the slot in the horizontal direction and the second holding surface for holding the slot in the vertical direction, these slots are cut in the vertical and horizontal directions. The work of inserting the slot becomes very easy, and the workability of exposing the slot can be greatly improved.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of a slotting machine according to the present invention.

FIG. 2 is an explanatory diagram of each part of the dispensing machine according to the embodiment.

FIG. 3 is an explanatory diagram of a variable switching state of a cutting amount of the lead-out machine in the embodiment.

FIG. 4 is an explanatory diagram of a connecting portion of an optical cable.

[Explanation of symbols]

 2 core material 4 slot 11 fixed side gripping body 12, 29 gripping section 13 slot holding section 14 first holding surface 15 second holding surface 16 blade 24 cutting edge 26 movable side gripping body 32 locking lever 40 connecting plate

Claims (2)

[Claims] 1. A slot holding portion for holding a slot is formed on the tip side of a fixed-side grip body, a movable-side grip body is rotatably attached to the fixed-side grip body, and the fixed-side grip body further has a fixed-side grip body. The blade body is mounted so as to be frictionally rotatable, and the cutting edge formed on the front side of the blade body is arranged so as to face the slot holding portion, and a positioning protrusion is provided on the rear side of the blade body toward the movable side gripping body side. The movable side gripping body is rotatably attached to the movable side gripping body by being biased by the biasing means in the direction of rotation of the blade body toward the positioning projection side, and the blade is attached to the locking plate. A plurality of engaging recesses are formed in an array in the front-rear direction on the surface side of the body that faces the positioning protrusions, and when the positioning protrusions are locked in the frontmost engaging recesses of the engaging recesses, disconnection with respect to the slot holding portion occurs. The maximum opening of the blade and the movable side gripper on the fixed side When the positioning protrusion of the blade comes out of the engaging recess of the mating member every time the rotation is returned to the grip body after making a notch, the positioning plate is positioned by the urging force of the urging means. A slotting machine in which the opening degree of the cutting edge is gradually reduced by rotating the blades to the side and sequentially switching and engaging the engaging recesses on the rear side. 2. The slot ejector according to claim 1, wherein the slot holding portion is provided with a first holding surface for holding the slot horizontally and a second holding surface for holding the slot vertically.