JPH0517765B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method and apparatus for stripping only the covering of a covered electric wire while cutting it.

Prior Art When connecting a relay terminal or the like to a covered electric wire, it is necessary to strip off only the covering of that part. Conventionally,
Stripping such coatings requires hand tools or
Power tools are used.

Most conventional tools cut the coating of the stripped portion at both ends of the stripping location, and then forcibly tear off the coating of the cut portion. For this reason, as the insulated wire becomes thinner, it becomes difficult to tear it into strips, and even if forcible stripping is possible, extreme care must be taken when thin insulated wires are used, as the thin core wire inside is likely to break. , workability deteriorates. There is also a method of exposing the internal wire by making a cut in the sheathing part of the wire and then shifting the sheath while deforming it in the axial direction. Because it will be restored to its position,
It becomes difficult to fully expose the core wire.

OBJECT OF THE INVENTION Therefore, an object of the present invention is to enable the coating of a relatively thin electric wire to be completely stripped off without applying excessive external force to the intermediate portion thereof.

SUMMARY OF THE INVENTION Therefore, the present invention involves cutting only the sheathing into rings at both ends of the length to be stripped of the sheathed wire using a first cutter, and simultaneously or thereafter cutting the sheathing in the longitudinal direction within the length to be stripped. A second cutter forms a diametrical incision along the stripping portion of the coating, and the semicircular arc of the cut coating is forcibly moved in the stripping direction by the movement of the second cutter, with the cut portion as a boundary. I'm trying to pull them apart.
This series of steps involves the use of a first cutter to cut both ends of the length to be stripped, and a second cutter to make longitudinal cuts within the length to be stripped.
Katsuta, and these first Katsuta, and second Katsuta.
This is realized by a driving means that moves the cutter forward and backward in the cutting direction and moves the second cutter in the direction of stripping off the coating after cutting. This driving means uses a cam or a link mechanism to drive the synchronous movement to the first
It is materialized by transmitting the information to the cutter and the second cutter.

Structure of the Invention FIG. 1 shows a sheathed wire stripping device 1 of the present invention.
An example of this is shown. This stripping device 1
is a pair of first cutters 3 for cutting only the sheathing 2a of the insulated electric wire 2 at both ends of the insulated electric wire 2 with a stripping length L; It is constituted by a pair of second cutters 4 provided symmetrically on the left and right sides, and a drive means 5 for driving them.

The first cutter 3 is fixed to a pair of left and right sliders 6, respectively, with semicircular arc-shaped blades facing each other. This slider 6 is provided on a guide surface 8 on the upper surface of the machine base 7 so as to be able to move forward and backward, and rotatably supports a pair of upper and lower holders 10 by horizontal support shafts 9 provided above and below. There is. These holders 10 are connected to the second cutter 4 at the tip thereof.
are held in a downward or upward position, respectively, and are biased by a spring (not shown) in a direction in which the abutting portion 11a contacts the elliptical cam 12 at the rear end. In addition, holder 10
A slope portion 11b is provided by the support shaft 9.
This elliptical cam 12 is supported by a block 14 mounted on the machine base 7 by a cam shaft 13. The block 14 has holding grooves 14a on both sides, and is designed to enclose the slider 6.

Further, a driving shaft 15 is provided inside the machine base 7, and a crank 16 of the driving shaft 15 is connected to one end of a driving link 20 via a connecting pin 17, a connecting link 18, and a connecting pin 19. . This drive link 20 is rotatably attached to the machine base 7 by a central fulcrum shaft 21, and
The other end portion is connected to each of the sliders 6 through a long hole 22 and a connecting pin 23. Note that this driving shaft 15 and the cam shaft 13 of the cam 12
are connected to each other by a gear train, etc., and rotate in synchronization. These slider 6, holder 10, cam 12, and crank mechanism constitute the driving means 5 of the present invention.

FIG. 2 shows the positional relationship between a pair of first cutters 3 and a pair of left and right second cutters 4 at both ends with respect to the covered wire 2.

Effect of the Invention Next, FIG. 3 shows the process of stripping off the covering 2a of the covered wire 2 together with the operations of the first cutter 3 and the second cutter 4.

First, as shown in FIG. 3A, the pair of sliders 6 are in mutually retracted positions, and the covered wire 2 is positioned in the holding groove 14a of the block 14.

After this preparatory work, the driving shaft 15 begins to rotate counterclockwise in FIG. 1, either manually or electrically.

When this driving shaft 15 rotates counterclockwise, the movement of the drive link 20 causes the left and right sliders 6 to
approach the covered wire 2 with each other.

During its movement, a pair of first cutters 3 are attached at each end.
As shown in FIG. 3B, the semicircular blade portion cuts only the covering 2a of the covered wire 2 (first cutting step). At the same time, the second cutter 4 also approaches the center of the covered wire 2, and their cutting edges touch each other.

Simultaneously with or after this first cutting step,
By the rotation of the cam 12, the holder 10 is moved to the support shaft 9.
The pair of second cutters 4 at the tip rotate around the
is moved in the direction of the incision in the covered wire 2. In this process, these second cutters 4 cut within the stripping length L of the covered wire 2, as shown in FIG. 3B.
The coating 2a is cut in the diametrical direction, and the coating 2a is made into a separable state at this cut as a boundary (second cutting step).

Through such a first cutting step and a second cutting step, the covering 2a is completely separated from the remaining portion of the covering 2a at both ends of the stripping length L,
Furthermore, the area to be peeled off is set in a state where it can be completely separated by a cut surface in the diametrical direction.

Thereafter, when the driving shaft 15 moves to the second half of one rotation, the left and right sliders 6 move away from the covered wire 2, that is, in the backward direction. During the retreat, the sloped portion 11b of the holder 10 hits the outer periphery of the cam 12, causing the pair of second cutters 4 to move closer together.
As shown in FIG.
An arcuate movement is performed in a direction away from the insulated wire 2 in a direction perpendicular to the incision direction of the cutting process (perpendicular to the advance/retreat direction of the second cutter 4 and in a direction in which the sheathing 2a is stripped), and the center of the stripped part of the sheathing 2a is moved. Core wire
Forcibly separate from 2b. At this time, the coating 2a
The stripped part is completely separated from the remaining coating 2a, and the cut is made so that it can be divided into left and right parts, so it can be easily stripped off with almost no effect on the core wire 2b (the stripping process ). In this way, the covered wire 2 is processed so that the core wire 2b is exposed within the stripping length L, as shown in FIG.

Of course, when the pair of sliders 6 return completely,
The first cutter 3 and the second cutter 4 are both separated and have the following operation.

Modifications of the Invention In the above embodiment, the second cutters 4 are arranged as a pair of upper and lower cutters and two sets of left and right cutters, that is, a total of four cutters.
One of the left and right second cutters 4 may be omitted. If you do that,
Only one sheathing 2a will be pulled away from the central core wire 2b, but then the opposite sheathing 2a
is in a condition where it can fall with light force or by itself.

Further, in the above embodiment, the cutting directions of the first cutter 3 and the second cutter 4 are set to be perpendicular to each other, but the cutting directions may be set to the same direction.

Further, although the driving means 5 is constituted by a link mechanism and a cam mechanism, these can also be realized by using an air cylinder or other plunger that interlocks with each other.

Note that the peeling length L can also be made variable by making the interval between the first cutters 3 and the width of the second cutter 4 changeable.

In this case, after cutting into the sheathing 2a without changing the width of the second cutter 4, move the second cutter 4 in the longitudinal direction of the covered wire 2 and make a cut across the entire width of the stripping length L. You can do it like this.

Furthermore, depending on the size of the insulated wire 2 and the material of the sheath 2a, the cutting depth in the circumferential direction by the first cutter 3 may not need to be the entire thickness of the sheath 2a, or the depth of the cut in the longitudinal direction by the second cutter 4 may not be necessary. There are some cases where the coating 2a can be easily stripped off without the need to extend the entire stripping length L.
The shapes of the first cutter 3 and the second cutter 4 can be selected as appropriate.

Effects of the Invention In the present invention, only the sheathing is cut into rings at both ends of the stripped length of the sheathed wire, and moreover, the sheathing is cut in a state where it can be separated along the diameter surface within the range of the stripped length. Because the coating is stripped off from the wire with a light force, the coating is then forcibly stripped off by the second cutter, so this series of steps Since the sheathing is completely cut and stripped, and no excessive external force is applied to the core wire during the stripping process, the sheath stripping work can be carried out smoothly from thick wires to thin wires.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the insulated wire stripping device of the present invention, FIG. 2 is a plan view showing the positional relationship between the insulated wire and the first and second cutters, and FIG. 3 is a diagram showing the stripping process. The explanatory diagram, FIG. 4, is a plan view of the covered wire after being stripped. DESCRIPTION OF SYMBOLS 1... Insulated electric wire stripping device, 2... Insulated electric wire, 3... First cutter, 4... Second cutter, 5...
...Driving means, 6...Slider, 10...Holder, 11a...Abutting portion, 11b...Slope portion, 12
...Cam, 14a... Holding groove, 15... Drive shaft,
16...Crank, 20...Drive link.

Claims (1)

[Scope of Claims] 1. A first cutting step of cutting only the sheath 2a of the sheathed wire 2 into round slices with a pair of first cutters 3 at both ends of the stripped length of the sheathed wire 2;
a second cutting step of sandwiching the coating 2a along the longitudinal direction with at least one pair of second cutters 4 and cutting the coating 2a in the radial direction with each second cutter 4; 2 katsuta 4
a stripping step in which the sheathing 2a is moved in a direction perpendicular to the cutting direction of the second cutting step and away from the sheathed wire 2, and the sheathing 2a is stripped from the sheathed wire 2 over the stripping length. Method for stripping the insulation from covered wires. 2. A block 14 that holds the insulated wire 2 in a positioned state within the groove, and a block 14 that holds the insulated wire 2 in a positioning state, and a block 14 that holds the insulated wire 2 in a positioned state at both ends of the stripped length of the insulated wire 2 in order to cut only the sheath 2a of the insulated wire 2 into rounds. A pair of first cutters 3 are provided to be movable forward and backward on both sides, and a pair of first cutters 3 are movable back and forth on both sides centering on the insulated wire 2 within the above stripping range in order to cut the sheath 2a of the insulated wire 2 along the longitudinal direction. At least a pair of second cutters 4 which are perpendicular to the advancing and retreating direction and movable in the stripping direction of the coating 2a, and which give advancing and retreating motion to the first cutter 3 and the second cutter 4, and A sheathed wire stripping device 1 comprising a drive means 5 for moving the second cutter 4 in the stripping direction during backward movement.