JPH0669257B2 - Electric wire coating stripping method, electric wire coating stripping apparatus, and cutting blade used in the apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric wire coating stripping method for stripping a coating material coated on an electric wire, an electrical wire coating stripping apparatus, and a cutting blade used in the apparatus.

[Prior Art] Conventionally, in cold regions with a lot of snow, two fins 3 are provided on the outside of the covering material 2 for covering the conductor 1, as shown in FIG. 10, in order to prevent snow from adhering to the electric wires. There is a place where the provided electric wire with fin E is used.

When wiring and connecting the finned electric wire E at a construction site or the like, the covering material 2 at the connection portion is stripped off to expose the conductor 1 in the same manner as a normal electric wire, and a conductor is formed by using a sleeve and a clamp device. I was making a connection. At that time, although the worker directly peeled off the covering material 2 of the finned electric wire E using an electric knife, the peeling work was often performed in a live wire state.

[Problems to be Solved by the Invention] However, in such a conventional electric wire connecting method, an operator directly peels off the covering material 2 of the finned electric wire E using an electric knife to directly touch the conductor. Since the peeling work is often performed in a live state, it was a dangerous work. This is the covering material 2 for the electric wire E with fins.
This is because a device capable of easily and safely peeling off was not provided.

In other words, since the finned electric wire E has the fins 3 provided on the outer side of the covering material 2, it cannot be peeled by the conventional electric wire coating peeling device or the workability is extremely poor. Examples of such conventional electric wire coating stripping apparatus include a cutting blade rotating method of cutting a coating material by rotating a cutting tool on the circumference of an electric wire, a semi-circular blade having two parallel blades and a receiving blade. There is a double-ended and parallel blade shearing method that cuts off the covering material at a predetermined location using a blade.

However, in the cutting rotation method, there is a problem that the electric wire E is twisted due to the cutting bit hitting the fin, resulting in defective cutting or uneven cutting.

In addition, in the double-ended ring cutting / parallel blade shearing method, the covering material 2 of the finned electric wire E can be peeled off, but not only cannot work from one direction, but an auxiliary tool is required for the final peeling. However, there is a problem that the workability is poor and a rotation space for the tool is required.

The present invention has been made in view of the above-mentioned problems, and easily and safely peels a covering material for not only an ordinary round electric wire but also a finned electric wire by a work from one direction without requiring an auxiliary tool. An object of the present invention is to provide a wire coating stripping method, a device therefor, and a cutting blade used therefor.

[Means for Solving the Problem] In order to achieve the above object, in the wire coating stripping method of the present invention, the blade tip side shaft portion (16) at the tip of the conductive shaft (14) is slidable on the holder (20). The cutting edge block (30) having a pair of push-cutting blades (32) on both sides is fixed to the tip side of the blade side shaft portion, and a vertically long guide hole (19) is provided on both sides of the holder. Two pairs of scissors members (33) each having a cam pin (37) fixed to the cutting edge side shaft portion slidably mounted in the guide hole and having cam grooves (36) on both sides of the holder along which the cam pin slides. ) Is attached by a support pin (35) so as to be openable and closable, and a vertical cutting blade (42) and a pulling cutting blade (44) are attached to the tip of the scissors member so that the cam grooves (36) are shaped so as to be separated from each other. Therefore, the conduction axis (1
4) Grasp the coated wire only in the step of pressing the coated wire in a certain direction with hydraulic pressure, and cover material chips (2a) at fixed intervals of the coated wire.
Make a cut in the circumferential direction with the pulling blade (44) and the push cutting blade (32), and make a cut in the vertical direction with the vertical cutting blade (42) as well. By further pressing the portion (16), the covering material can be easily and surely peeled off.

Further, in order to effectively realize such a wire coating stripping method, in the wire coating stripping device of the present invention, the conductive shaft (14)
The tip side shank (16) is slidably installed in the holder (20), and the tip side of the tip side shank has a pair of push-cut blades (32) on both sides.
With a cutting edge block (30) having a longitudinally extending guide hole (19) on both sides of the holder, and a cam pin (37) fixed to the blade tip side shaft part slidably inside the guide hole. And cam grooves where the cam pins slide on both sides of the holder
Two pairs of scissors members (33) having (36) are attached by a support pin (35) so as to be openable and closable, and a vertical cutting blade (42) and a pulling cutting blade (44) are attached to the tip of the scissors member, and the cam groove is formed. By making the shape of (36) reciprocal, the coated electric wire is gripped only in the step of pressing the conduction shaft (14) in a certain direction by hydraulic pressure, and the covering material chips at constant intervals of the coated electric wire ( Make a cut in the circumferential direction of (2a) with the pulling cutting edge (44) and the push cutting edge (32), and cut the vertical cutting edge (4
A feature is characterized in that a cut is also made in the vertical direction according to 2), the vertical cutting blade with the cut is opened, and the blade tip side shaft portion (16) is further pressed to peel off the covering material chip.

Then, the vertical cutting blade (42) and the pulling cutting blade (44) are mounted via the outer blade receiving base (40), and the push cutting blade (32) is mounted via the inner blade receiving base (24). Easy to replace each blade.

Further, as the cutting blade, two sets of a horizontal cutting blade including a pair of pull cutting blades and push cutting blades that make horizontal cuts at two locations, and a comb-shaped blade that makes a vertical cut that extends in the vertical direction and reaches both horizontal cuts By forming it with a vertical cutting blade having a portion, the electric wire can be easily caught and the covering material can be reliably peeled off.

[Operation] By using the wire coating stripping method as described above, the coating material chip can be stripped easily and quickly.

Further, when the electric wire is inserted between the scissors members of the electric wire coating stripping device configured as described above and the supporting member is relatively moved with respect to the holder by the cam mechanism including the cam groove and the cam pin, the action of the cam mechanism causes , Both scissors members are closed and two sets of horizontal cutting blades are used to make two horizontal cuts in the covering material, and a pair of vertical cutting blades are used to make vertical cuts that reach the horizontal cuts, and further open from the vertical cuts to both sides. Thus, the covering material on any part of the electric wire can be easily peeled off.

Furthermore, after making two horizontal cuts on the covering material with the horizontal cutting blades and then making vertical cuts with a pair of interlocking vertical cutting blades having comb-shaped blade portions, the scissor members are slightly separated. Even if the mouth is opened, no uncut portion is left.

Further, by adopting a structure in which the vertical cutting blade to which the horizontal cutting blade is attached can be detachably fixed to the scissors member by the cutting blade fixing means, the cutting blade can be easily replaced.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 7 are views showing an embodiment of the present invention.

First, the structure will be described. In the figure, 4 is an outer cylinder, 5 is an outer cylinder 4.
An inner cylinder 6 inserted into the inner cylinder 6 is a joint sleeve in which one end of the outer cylinder 4 is fitted and fixed.
While supporting one end thereof, a double acting single rod type fluid pressure cylinder 7 is screwed to the other end of the joint sleeve 6. Reference numeral 8 is a hose joint, 9 is a rubber hose, and 10 is an operation switch of a fluid pressure source (not shown) to which the rubber hose 9 is connected, and an insulating cover made of an insulator such as rubber that covers the grip portion of the outer cylinder 4. It is attached to the outside of 11 using a mounting band 12.

One end of a transmission shaft 14 penetrating the outer cylinder 4 and the inner cylinder 5 is screwed onto the piston rod 13 of the fluid pressure cylinder 7. The transmission shaft 14 includes a cylinder side shaft portion 15 connected to the piston rod 13, a cutting edge side shaft portion 16 having a tip portion protruding from the outer cylinder 4, and a connection shaft portion 17 connecting the both shaft portions. The mating shaft portions are connected by a convex portion and a concave portion which are fitted to each other, and are coupled by a spring pin 18. Further, the tip end portion of the blade tip side shaft portion 16 also penetrates the axial hole 21 of the holder 20 press-fitted into the tip end portion of the outer cylinder 4.

The holder 20 has a guide hole 19 and an elongated hole 22 penetrating in the radial direction and extending in the axial direction. Both holes 19 and 22 are opened in directions orthogonal to each other, and a cam pin 37 is provided in the guide hole 19. In addition, stopper pins 23 are slidably engaged with the elongated holes 22 so as to radially project through the blade-side shaft portion 16 and project laterally. An inner blade receiving base 24 having a convex portion fitted in the concave portion is fixed to the tip of the blade tip side shaft portion 16 by a spring pin 25. A dovetail groove 26 and an axial hole 27 are provided at the tip of the inner blade support 24, and a spring 28 and an engagement pin 29 are provided in the axial hole 27.
And the tip of the engaging pin 29 is projected into the dovetail groove 26 by the spring force of the spring 28.

Reference numeral 30 denotes a cutting blade block 30 in which the dovetail groove 26 is engaged with the dovetail 31 and comprises a base having the dovetail 31 and protrusions standing on both sides of the base, and the base has a pin hole. , By engaging the engaging pin 29 with this pin hole,
The cutting blade block 30 is locked to the inner blade receiving base 24. Then, on the outer side of each protrusion of the cutting blade block 30, a push cutting blade 32 is provided.
Is screwed on.

Reference numeral 33 denotes scissors members swingably attached to both sides of the front portion of the holder 20, and one pair of scissors members 33 is formed by two arm pieces 34. The arm piece 34 is composed of a base portion 34a having a cam groove 36 and an arm portion 34b protruding from the base portion 34a. The arm piece 34 penetrates the holder 20 in parallel with the guide hole 19 through a pin hole provided in the base portion 34a. Two sets of scissors members 33 are swingably supported on both sides of the holder 20 by penetrating two provided support pins 35 and screwing both ends of the support pins 35.

The cam groove 36 is formed in the overlapping portion of the two arm pieces 34, and both ends of the cam pin 37 provided on the blade tip side shaft portion 16 are engaged with each other. The cam grooves 36 of both arm pieces 34 are
A central cam portion 36a extending substantially parallel to the arm portion 34b, inclined cam portions 36b provided at both ends of the central cam portion 36a,
36c, both the inclined cam portions 36b and 36c are formed outward so as to be separated from each other between the pair of arm pieces 34.

Reference numeral 40 denotes an outer blade pedestal whose one end is screwed to the arm pieces 34 of the other set, and a dovetail groove 41 is provided inside. Reference numeral 42 denotes a vertical cutting blade that engages the dovetail 43 with the dovetail groove 41, and includes a base portion 42a having the dovetail 43, and a plurality of claw-shaped blade portions 42b provided so as to project inward from the base portion 42a. The blade part 42b is formed in a comb-like shape so that it can mesh with the other vertical cutting blades 42. A pull cutting blade 44 having a sickle-shaped blade is screwed to both surfaces of the vertical cutting blade 42.

The blade portion of the pulling blade 44 has an arc portion forming approximately 90 degrees and a slight parallel portion following the arc portion.
4 and one push-cutting blade 32 having an arc-shaped blade portion forming an angle of about 180 degrees form one set of horizontal cutting blades.

Reference numeral 45 shown in FIGS. 1 and 2 denotes a holding piece for fixing the vertical cutting blade 42 to the outer blade receiving base 40, which is fixed to the arm piece 34 by a screw 46 so as to be fixed. The pressing piece 45 and the screw 46, and the dovetail groove 41 and the dovetail 43.
And constitute cutting edge fixing means for detachably fixing the vertical cutting edge 42 to the scissors member 33.

An electric wire such as an electric wire with a fin or a round electric wire for peeling off the covering material is inserted into the space inside the horizontal cutting edge and the vertical cutting edge surrounded by the two sets of scissors members 33.

Next, the operation of this embodiment will be described.

6 (a) to 6 (f) and FIG. 7 are diagrams for explaining the operation of this embodiment, and show an embodiment in which the covering material 2 is stripped from the finned electric wire. In this device, an operator can insulate the insulating cover 11
Use by holding the part with both hands.

When the finned electric wire 2 is inserted into a tool, the fluid pressure of a fluid pressure generator (not shown) is supplied to the fluid pressure cylinder 7 via the rubber hose 9 and the hose joint 8 to supply the piston rod 13 with the fluid pressure.
Retreat. Then, the cam pin 37 provided on the transmission shaft 14 that moves integrally with the piston rod 13 moves in the same direction, and the pair of arm pieces 34 having the cam groove 36 with which the cam pin 37 engages follows the cam groove 36. Will be displaced.

In this case, since the rear side inclined cam portions 36c, which are the moving directions of the cam pins 37, are directed outward so as to separate from each other, the action of the cam pins 37 that fluctuate so that the inclined cam portions 36c coincide with each other causes the pair of arms to move. The arm 34b side of the piece 34 is opened as shown in FIG. 6 (a). Thereafter, as shown in FIG. 6 (b), the finned electric wire 2 is inserted into the openings of the two sets of scissors members 33.

From this state, the fluid pressure of the fluid pressure cylinder 7 is applied in the opposite direction to move the piston rod 13 forward,
When the cam pin 37 advances along the cam groove 36 and reaches the central cam portion 36a, as shown in FIG. 6 (c), the scissors member 3
The end faces of the vertical cutting blades 42 that are paired with each other when 3 are closed contact each other.
At this time, the blade portions 42b of the pair of vertical cutting blades 42 are comb-shaped and are formed so that they can mesh with each other.
The blade portion 42b of the one vertical cutting blade 42 is outside the support center L of the electric wire 2, that is, the other vertical cutting blade 42 as shown in FIG.
Has entered the realm of.

When the piston rod 13 further advances, the inner blade receiving base 24 and the cutting blade block 30 fixed to the tip of the piston rod 13 also move forward, and the push cutting blade 32 fixed to the tip of the cutting blade block 30.
Pushes the electric wire E against the pulling cutting blade 44 and the vertical cutting blade 42 side.
As a result, as shown in FIG. 6 (d), the push-cutting blade 32 and the two pulling-cutting blades 44 forming the horizontal cutting blade are covered with the covering material 2 of the electric wire E.
A horizontal cut extending in the circumferential direction is provided to make a circular cut at two locations, and a vertical cut that extends in the vertical direction and reaches both horizontal cuts is provided between the two horizontal cuts. As a result, the covering material chip 2a is formed that has two vertical cuts that are cut into two horizontal cuts.

Further, when the cam pin 37 enters into the front side inclined cam portion 36a by advancing the piston rod 13,
Since the front side inclined cam portions 36b extend in the directions away from each other, as shown in FIG. 6 (e), the tip ends of the arm pieces 34 swing in the directions away from each other. At this time, since the blade portion 42b of each vertical cutting blade 42 bites into the covering material 2 or the fin 3 thereof, each vertical cutting blade 42 interlocks with the swing of the arm piece 34 and the vertical cutting edge of the covering material chip 2a is cut. The edges are spread outwards, so that the conductor 1 of the electric wire E is exposed.

By retracting the entire tool from this state,
As shown in (f), the covering material chip 2a can be separated from the electric wire E.

When the vertical cutting blade 42 is replaced, the screw 46 fastening the pressing piece 45 is loosened, and the pressing piece 45 is rotated to reverse the portion abutting the side surface of the vertical cutting blade 42 by 90 degrees or more. . As a result, the vertical cutting blade 42 can be moved in the direction of the dovetail 43, so that the vertical cutting blade 42 can be replaced easily and quickly.

Also, when replacing the push-cut blade 32, the cutting blade block 30
It is possible to easily remove the cutting blade block 30 by inserting a screwdriver or the like into the hole provided at the position to retract the engaging pin 29 and then pulling out the cutting blade block 30 in the dovetail direction. When the cutting blade block 30 is inserted, it is only necessary to fit the dovetail 31 into the dovetail groove 26 and insert the dovetail groove 26, whereby the push-cutting blade can be replaced easily and quickly.

8 and 9 are views showing the main part of another embodiment of the present invention.

In this embodiment, a guide bar 50 for the electric wire E is provided in order to efficiently remove the covering material for the thin electric wire E on the conductor 1. The guide bar 50 is fixed to a mounting block 52 with a screw 51, the pressing cutting blade 32a is sandwiched by the mounting block 52, and is fixed to the cutting blade block 30a with a screw 53.

In this case, when the scissors member is brought close to the electric wire E, the electric wire E is guided by the guide bar 50 and moved to the push-cut blade 32a portion to be set at a predetermined position, so that the electric wire E is securely inserted without being caught. can do.

Other configurations and operations are the same as those of the above-described embodiment, and with such a configuration, the covering material can be reliably and quickly stripped off even with the thin electric wire E.

[Effects of the Invention] As described above, according to the present invention, only two steps of pressing the conductive shaft in a certain direction by hydraulic pressure are used to form an annular lateral strip at two locations on the wire covering material with two sets of horizontal cutting blades. In addition to the cuts, the vertical cuts reach both horizontal cuts, and the cam mechanism allows the vertical cuts to be displaced relatively to the outside, so the coating of various wires such as finned wires and round wires It is possible to provide an electric wire coating stripping method that can easily and surely strip material regardless of the presence or absence of fins, size, etc., and that can safely perform such stripping work while the wire is live. The effect is obtained.

In addition, the wire sheath stripping device is provided with two sets of horizontal cutting blades, a pair of vertical cutting blades, two sets of scissors members, a holder and a conductive shaft, and a cam groove is provided on the scissors members and a cam pin is provided on the conductive shaft side. Since it is configured, it is possible to easily and reliably strip off the wire covering material regardless of the presence or absence of fins and the size of the fins by only pressing the conductive shaft in a certain direction by hydraulic pressure, and an auxiliary tool is required. The effect that it is possible to provide an apparatus capable of performing the stripping operation of the covering material by the operation from one direction without doing so is obtained.

Since the vertical cutting blade to which the pulling cutting blade is attached is configured to be attachable to and detachable from the scissors member by the fixing means, it is possible to easily and quickly replace the cutting blade.

Further, since the cutting blades are configured by two sets of horizontal cutting blades each including one push cutting blade and two pulling cutting blades, and a pair of vertical cutting blades that can be meshed with each other, the stripping of the covering material is performed. Can be done efficiently.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is an exploded perspective view of the same apparatus as a whole, and FIG. 4 is an enlarged sectional view of an inner blade receiving portion. 5, FIG. 5 is also an enlarged side view of the inner blade receiving portion, FIGS. 6 (a) to 6 (f) are explanatory views for explaining the operation of the present invention, and FIG. 7 is also the operation of the vertical cutting blade. FIG. 8 is a partially sectional front view showing the main part of another embodiment of the present invention, FIG. 9 is a plan view of the same, and FIG. 10 is a perspective view showing a finned electric wire. It is a figure. 1: Conductor 2: Cover material 3: Fin, 7: Fluid pressure cylinder 14: Transmission shaft, 16: Blade side shaft part 20: Holder, 24: Inner blade holder 30,30a: Cutting blade block, 32, 32a: Push cutting blade 33: Scissors member, 34: Arm piece 36: Cam groove, 36a, 36b, 36c: Cam part 37: Cam pin, 40: Outer blade holder 42: Vertical cutting blade, 44: Drawing cutting blade

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toshiaki Doi 3-7-1, Ichibancho, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. (72) Inventor Kuniharu Abe 1-2-1, Koriyama, Sendai City, Miyagi Prefecture Northern Japan Electric Cable Co., Ltd. (72) Inventor Yoshio Saito 1-2-1, Koriyama, Sendai City, Miyagi Prefecture Northern Japan Electric Cable Co., Ltd. (72) Inventor, Keisho Akagawa 1-2-1, Koriyama, Sendai City, Miyagi Prefecture (56) Reference JP-A-50-55881 (JP, A) JP-A-55-13637 (JP, A) Actual Kaihei 1-116510 (JP, U)

Claims (4)

[Claims] 1. A holder for a blade side shaft portion (16) at the tip of a transmission shaft (14).
(20) is slidably mounted inside, and a cutting edge block (30) having a pair of push-cutting blades (32) on both sides is fixed to the tip side of the cutting edge side shaft portion, and a vertical guide is provided on both sides of the holder. A hole (19) is provided, a cam pin (37) fixed to the cutting edge side shaft portion is slidably installed inside the guide hole, and a cam groove (36) on both sides of the holder along which the cam pin slides is provided. Two pairs of scissors members (33) are attached by a support pin (35) so as to be openable and closable, and a vertical cutting blade (42) and a pulling blade (44) are attached to the tip of the scissors member, and the cam groove
By making the shape of (36) reciprocal, the coated electric wire is gripped only in the step of pressing the conductive shaft (14) in a certain direction by hydraulic pressure, and the covering material chips at constant intervals of the coated electric wire ( Make a cut in the circumferential direction of 2a) with the pulling blade (44) and the push cutting blade (32), and make a cut in the vertical direction with the vertical cutting blade (42). Side shaft
(16) A wire coating stripping method, characterized in that the coating material chip is stripped by further pressing. 2. A holder for a blade-side shaft portion (16) at the tip of the transmission shaft (14).
(20) is slidably mounted inside, and a cutting edge block (30) having a pair of push-cutting blades (32) on both sides is fixed to the tip side of the cutting edge side shaft portion, and a vertical guide is provided on both sides of the holder. A hole (19) is provided, a cam pin (37) fixed to the cutting edge side shaft portion is slidably installed inside the guide hole, and a cam groove (36) on both sides of the holder along which the cam pin slides is provided. Two pairs of scissors members (33) are attached by a support pin (35) so as to be openable and closable, and a vertical cutting blade (42) and a pulling blade (44) are attached to the tip of the scissors member, and the cam groove
By making the shape of (36) reciprocal, the coated electric wire is gripped only in the step of pressing the conduction shaft (14) in a certain direction by hydraulic pressure, and the covering material chips at constant intervals of the coated electric wire ( Make a cut in the circumferential direction of 2a) with the pull cutting blade (44) and the push cutting blade (32), and also make a cut in the vertical direction with the vertical cutting blade (42), and the vertical cutting blade with the cut will open and the blade edge Side shaft
(16) The wire coating stripping device, wherein the coating material chip is stripped by further pressing. 3. A vertical cutting blade (42) and a pulling cutting blade (44) are attached via an outer blade receiving base (40), and a push cutting blade (32) is attached to an inner blade receiving base (24).
The electric wire coating stripping device according to claim 2, wherein the blades can be easily replaced by attaching the blades via the cable. 4. A pair of drawing cutting blades (44) for making horizontal cuts in an angle range of about 90 degrees to each other on a covering material of an electric wire, and a pair of both cutting cutting blades and being continuous with the horizontal cuts. Two sets of horizontal cutting blades consisting of a push cutting blade (32) for making a horizontal cutting in the rest, and vertical cuttings provided between the blades making both horizontal cuttings and extending in the longitudinal direction to reach the horizontal cuttings. A cutting blade for an electric wire coating stripping device, comprising a pair of vertical cutting blades (42) each having a comb-like blade portion capable of meshing with each other.