JP2017099169A - Cable cover stripper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable cover stripper which is capable of visibly and easily confirming a position of a guard and further can be manufactured at low cost.SOLUTION: A cable cover stripper 1 comprises: a support 52 consisting of a holding part 52a, a fitting part 52b and a coupling part 52c; a shaft body 53 which is fitted to the support 52 and with which a male screw part 53a is engraved on its outer peripheral surface; a blade body holder 54 that is installed in the other end of the shaft body 53; a main blade 55 and an auxiliary blade 56 that are held by the blade body holder 54; and a guard 2 which is installed outside of side face plates 54b and 54b of the blade body holder 54 that are installed so as to partially cover a side face of the auxiliary blade 56, in a slidable manner along the side face plates 54b. A surface of the guard 2 opposite to the side face plates 54b is colored in red in a location (colored part 3a) that is visible while one end of the guard 2 is located at a "forward position" and, colored in blue in a location (colored part 3b) that is visible while one end of the guard 2 is located at a "backward position".SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric wire covering stripper used for an operation of peeling an electric wire covering, and more particularly to an electric wire covering stripper that can be easily handled and manufactured at low cost.

  When branching and connecting electric wires installed for power transmission / distribution and the like, in order to connect the core wires, it is necessary to peel the coating of the wires and expose the core wires. Generally, this operation is often performed using a dedicated tool (hereinafter referred to as an electric wire stripping device) in a live state.

Here, the structure of a conventional wire sheath stripper will be described with reference to FIGS.
4 and 5 (a) are a front view and a side view, respectively, of a wire coating stripper according to the prior art, and FIGS. 5 (b) and 5 (c) are a front view and a plan view of the guard, respectively. . 6 (a) and 6 (b) are enlarged views of a part of FIG. 5 (a).
As shown in FIGS. 4 and 5, the wire sheath stripper 51 has a support body 52 including a holding portion 52a, a mounting portion 52b, and a connecting portion 52c, and a male screw portion 53a on the outer peripheral surface, and one end thereof. A shaft body 53 provided with an engagement ring 60, a blade body holder 54 that holds the main blade 55 and the auxiliary blade 56, and an arm 57 that has an engagement ring 61 at the tip and is attached to the back surface of the support body 52. It has.

  On the inner surface side of the holding portion 52a, a concave groove 58 having an arc shape when viewed from the side is provided in parallel with the width direction over the entire width, and a shaft body 53 is provided at the approximate center in the width direction of the mounting portion 52b. A through hole (not shown) to be inserted is drilled in parallel to the connecting portion 52c. The screw ring 59 fixed to the mounting portion 52b is provided with a female screw portion (not shown) that is screwed with the male screw portion 53a so as to communicate with the through hole.

The blade holder 54 includes a base member 54a, a pair of side plates 54b and 54b, and a connecting rod 54c. The main blade 55 is screwed to the base member 54a, and the auxiliary blades 56, 56 are respectively installed at both ends in the width direction of the main blade 55 and screwed to the side plates 54b, 54b.
In addition, the main blade 55 and the auxiliary blade 56 are installed in the location where the cut | disconnection along a length direction and the cut | disconnection along the circumferential direction are each formed with respect to the coating | cover of the electric wire arrange | positioned in the ditch | groove 58.

The holding portion 52a of the support body 52 is provided with recesses 62 and 62 at locations where the tips of the side plates 54b and 54b abut. That is, the wire sheath stripper 51 has a structure in which the cutting depth of the main blade 55 and the auxiliary blade 56 with respect to the wire coating is limited so that the blade holder 54 does not rise above a predetermined height. ing.
Further, guards 63 each having a long hole 63a are attached to the outside of the side plates 54b and 54b using screws 64 so as to be slidable in a direction perpendicular to the shaft body 53. A coil spring 65 is provided between the guard 63 and the side plate 64b to urge the guard 63 in a direction of pressing the guard 63 against the side plate 64b.

  In the wire sheath stripper 51 having such a structure, as shown in FIG. 6A, when the cutting edge of the auxiliary blade 56 can come into contact with the sheath of the wire L ahead of one end of the guard 63 (hereinafter referred to as the guard 63). When one end of the wire is in the “retracted position”), the wire L is cut by the auxiliary blade 56 in the coating. On the other hand, as shown in FIG. 6B, when one end of the guard 63 can come into contact with the coating of the electric wire L in front of the edge of the auxiliary blade 56 (hereinafter, one end of the guard 63 is in the “advance position”). The auxiliary blade 56 does not come into contact with the coating of the electric wire L, so that the auxiliary blade 56 does not form a cut in the coating of the electric wire L.

That is, as shown in FIG. 6A, in the state where the electric wire L is inserted into the concave groove 58 of the support body 52 and the guard 63 is retracted so that one end of the guard 63 is disposed at the “retreat position”, When the shaft ring 53 is rotated in a direction in which the blade holder 54 approaches the holding portion 52a by operating the engagement ring 60 (see FIG. 5A), the main blade 55 and the auxiliary blade 56 are covered with the wire L. The main blade 55 forms a cut along the length direction with the main blade 55.
Further, when the engagement ring 61 (see FIG. 5A) is gripped and the arm 57 is rotated around the axis of the electric wire L, the auxiliary blades 56, 56 are formed at both ends of the notch formed by the main blade 55. As a result, two cuts along the circumferential direction of the electric wire L are formed in the coating, and a portion of the coating sandwiched between the two cuts is peeled off from the electric wire L by the main blade 55.

Further, in the portion where the core wire is already exposed after the coating is peeled off, the core wire is not caught by the auxiliary blade 56 by moving the guard 63 forward so that one end of the guard 63 is disposed at the “advance position”. Can be.
However, the guard 63 may move without permission because the indirect hot wire tool or the like is in contact with the wire sheath stripper 51. In such a case, although one end of the guard 63 is in the “advance position”, the operator misunderstands that the one end of the guard 63 is in the “retreat position”, and the arm 57 is rotated around the axis of the electric wire L. If moved, the guard 63 may be damaged or detached from the blade holder 54.
Alternatively, even though one end of the guard 63 is in the “retracted position”, the operator misunderstands that the end of the guard 63 is in the “advanced position”, and the electric wire is already disposed in the portion where the coating has been removed. If the covering stripper 51 is moved along the length direction of the electric wire L, the auxiliary blade 56 may come into contact with the core wire, which may cause the core wire to be damaged.

Conventionally, various inventions and devices have been made for the wire sheath stripper in order to solve the adverse effects caused by the guard 63 moving carelessly. For example, Patent Literature 1 discloses an invention having a structure of operating a guard with an indirect hot wire tool under the name of “electric wire coating peeling tool”.
This invention has a structure in which a gripping portion having a size that can be gripped by an indirect hot wire tool is provided on a guard in a conventional wire sheath stripper.
With such a structure, even if the guard returns to the position where it guards the edge of the auxiliary blade for some reason (that is, the aforementioned “advanced position”), the auxiliary blade holds the guard with the indirect live tool. Can be retracted from the cutting edge. That is, since the guard can be moved by remote operation, there is no need to interrupt the work of peeling the coating from the electric wire and return the guard to its original position when the guard is moved carelessly. Therefore, working efficiency is improved.

Patent Document 2 discloses an invention having a structure capable of operating the necessity of cutting in the circumferential direction of the covering of the electric wire while being attached to the electric wire with the name “electric wire covering stripper”. ing.
The present invention provides a support structure for reciprocally supporting an auxiliary blade between a cutting position where the blade edge cuts into the sheath of the electric wire and a retracted position where the blade edge does not reach the sheath, and a holding structure for positioning and holding the auxiliary blade at each position And a pressure receiving structure that moves the auxiliary blade to each position in response to an urging force from a remote position.
According to such a structure, since there is no possibility that the auxiliary blade will inadvertently move during the operation of peeling the coating of the electric wire, the operation can be performed efficiently.

JP 2012-039750 A JP 2012-165507 A

  In the invention described in Patent Document 1, when the worker notices that the guard has moved, the guard can be quickly returned to the original position, but the worker does not notice that the guard has moved. In such a case, accidents such as breakage of the guard and damage to the core wire cannot be prevented.

  In addition, the invention described in Patent Document 2 does not protect the auxiliary blade by the guard, but moves the auxiliary blade itself and has a holding structure for holding the auxiliary blade in a predetermined position. No adverse effects in the prior art due to inadvertent movement. However, in this invention, since the structure of the auxiliary blade is complicated as compared with the wire sheath stripper according to the prior art, the manufacturing cost may be increased.

  The present invention has been made in view of such a conventional situation, and provides a wire sheath stripper that can easily visually check the position of a guard and can be manufactured at low cost. For the purpose.

  In order to achieve the above object, the first aspect of the present invention is a support body in which the holding part and the back side of the attachment part are connected by a connection part to form a substantially “U” shape in a side view and orthogonal to the attachment part. A shaft body that is held by the mounting portion so as to be able to advance and retreat with rotation about an axial center that is parallel to the longitudinal direction of the connecting portion, and between the holding portion and the mounting portion that is attached to one end of the shaft body Cut along the length direction and circumferential direction of the blade holder installed in the wire and the sheath of the electric wire installed so as to be parallel to the width direction of the support body between the blade holder and the holding part. Can be slid along the side plate of the blade holder that is installed so as to cover a part of the side surface of the auxiliary blade and the main blade and auxiliary blade attached to the blade body holder with the blade edge facing A guard to be installed, and one end of the guard is covered in front of the edge of the auxiliary blade. In the wire sheath stripper in which the guard is installed so as to be able to reciprocate between the “advance position” where the guard blade can come into contact with the “advance position” where the cutting edge of the auxiliary blade can contact the sheath in front of one end of the guard With respect to the surface facing the side plate, coloring is applied to a portion that is visible when one end of the guard is in the “advance position”.

  In the wire sheath stripper having such a structure, when one end of the guard is in the “advance position”, the colored portion of the guard is exposed and has a function of being visible.

In addition, the second aspect of the present invention is the first aspect of the present invention, instead of when one end of the guard is in the “advance position” or in the “advance position” with respect to the opposing surface, It is characterized in that a portion that can be visually observed is colored.
In the wire sheath stripper having such a structure, when one end of the guard is in the “retracted position”, the colored portion of the guard is exposed and has a function of being visible.

  In the first invention, it is possible to instantly grasp that one end of the guard is in the “advance position” only by checking the colored portion of the guard. That is, according to the present invention, it is easy to visually check the position of the guard even when the guard is inadvertently moved during the stripping operation of the electric wire. There is no risk of damaging the core wire of the electric wire. Moreover, since the structure is not complicated as compared with the conventional wire sheath stripper, it can be manufactured at a low cost.

  According to the second invention, it is possible to instantly grasp that one end of the guard is in the “retracted position” simply by confirming the colored portion of the guard. Therefore, the same effect as the first invention can be obtained. Play. In addition to the case where one end of the guard is in the “retracted position”, if the structure is also colored in the portion that is visible when it is in the “retracted position”, it is easier to visually check the position of the guard. Therefore, the effect of the first invention is further exhibited that there is no possibility of damaging the guard or brazing the core wire of the electric wire due to misunderstanding of the operator.

It is a front view of the Example of the electric wire coating stripper which concerns on embodiment of this invention. (A) is a side view of the wire coating stripper shown in FIG. 1, and (b) and (c) are a front view and a plan view of the guard, respectively. (A) And (b) is the figure which expanded and showed a part of Fig.2 (a). It is a front view of the electric wire coating stripper which concerns on a prior art. (A) is a side view of the wire sheath stripping device according to the prior art, and (b) and (c) are a front view and a plan view of the guard, respectively. (A) And (b) is the figure which expanded and showed a part of Fig.5 (a).

  The wire sheath stripper of the present invention will be described with reference to FIGS. Since the present invention is an improvement of a part of the wire sheath stripper 51 according to the prior art shown in FIGS. 4 to 6, the basic structure is the same as the wire sheath stripper 51. . Therefore, the components already described with reference to FIGS. 4 to 6 are denoted by the same reference numerals, and a part of the description is omitted.

FIGS. 1 and 2 (a) are a front view and a side view, respectively, showing an example of the structure of the wire sheath stripper of the present invention, and FIGS. 2 (b) and 2 (c) are respectively shown in FIG. It is the front view and top view of a guard which comprise the electric wire coating stripper. 3 (a) and 3 (b) are enlarged views of part of FIG. 2 (a), in which one end of the guard 63 is in the "retracted position" and in the "advanced position". Each state is shown.
1 to 3 correspond to FIGS. 4 to 6, respectively. However, in Fig.3 (a) and FIG.3 (b), while showing illustration of the guard 2 arrange | positioned in the drawing near side among a pair of guards 2 and 2, the electric wire L is shown with the broken line.

  As shown in FIGS. 1 and 2, the wire sheath stripper 1 includes a support body 52 that has a holding portion 52 a and a rear surface side of the mounting portion 52 b connected by a connecting portion 52 c and has a substantially “U” shape in side view. A shaft body 53 attached to the support body 52 and provided with an engagement ring 60 at one end and having an external thread 53a engraved on the outer peripheral surface thereof, and a blade body holder 54 installed at the other end of the shaft body 53. A main blade 55 and an auxiliary blade 56 held by the blade holder 54, and an arm 57 attached to the back surface of the support 52 and provided with an engagement ring 61 at the tip. In addition, the electric wire coating stripper 1 of the present embodiment is made of an aluminum alloy.

  The support body 52 is provided with a concave groove 58 having a semicircular shape when viewed from the side, on the inner surface side thereof over the entire width of the holding portion 52a, and a through-hole (parallel to the connecting portion 52c so that the shaft body 53 can be inserted). A screw hole (not shown) is formed in a substantially center in the width direction of the mounting portion 52b, and has a female screw portion (not shown) that communicates with the through-hole and engages with the male screw portion 53a. ) Is fixedly attached to the mounting portion 52b.

  The blade holder 54 is arranged between the holding portion 52a and the mounting portion 52b of the support body 52 and fixed to the end of the shaft body 53, and is continuously provided on both sides in the width direction of the base member 54a. A pair of side plates 54b, 54b and a connecting rod 54c disposed on the back side of the connecting portion 52c of the support body 52 with both ends supported by the pair of side plates 54b, 54b.

Both the main blade 55 and the auxiliary blade 56 have a flat plate shape, and the main blade 55 is disposed in the concave groove 58 of the holding portion 52a with respect to the covering of the electric wire installed so as to be parallel to the width direction of the support body 52. The base blade 54a is screwed to the base member 54a so as to be parallel to the connecting portion 52c in a state where the blade edge is directed so that a cut can be formed along the length direction. The cover is disposed between the side plates 54b and 54b and the widthwise ends of the main blade 55 so as to be orthogonal to the main blade 55 in a state where the cutting edge is directed so that a cut can be formed along the circumferential direction of the coating. In this way, the base member 54a is screwed.
With such a structure, in the wire sheath stripper 1, when the blade body holder 54 approaches the holding portion 52 a as the shaft body 53 rotates, the notch by the main blade 55 is connected to the connection portion of the wire sheath. At the same time, it is formed at both ends so that the cut by the auxiliary blade 56 is perpendicular to the above-mentioned cut by the main blade 55.

  The side plates 54b and 54b of the blade body holder 54 are formed so that portions corresponding to both sides of the concave groove 58 provided in the holding portion 52a of the support body 52 are higher than the main blade 55 and the auxiliary blade 56. In addition, a portion facing the concave groove 58 is cut out in a substantially U shape in a side view. In addition, the holding portion 52a of the support body 52 is provided with recesses 62 and 62 at locations where their tips abut so that the side plates 54b and 54b of the blade body holder 54 do not rise above a predetermined height. ing. That is, when the front ends of the side plates 54b and 54b are in contact with the recesses 62 and 62, the depth of the cut of the main blade 55 and the auxiliary blade 56 with respect to the wire coating is limited.

  A direction in which the guard 2 is orthogonal to the shaft body 53 by a screw 64 inserted into the elongated hole 2 a on the outside of the side plates 54 b and 54 b of the blade holder 54 installed so as to cover a part of the side surface of the auxiliary blade 56. It is slidably attached along the side surface plate 54b. Further, the guard 2 is urged by a coil spring 65 in a direction in which the guard 2 is pressed against the side plate 5b. Further, the guard 2 is colored red at a portion (colored portion 3a shown in FIG. 2 (c)) that is visible when one end thereof is at the “advance position” with respect to the surface facing the side plate 54b. The blue portion is colored in a portion (colored portion 3b shown in FIG. 2C) that is visible when one end thereof is in the “retracted position”.

  In the wire sheath stripper 1 having such a structure, when one end of the guard 2 is in the “retracted position” as shown in FIG. 3A, the colored portion 3a is hidden by the side plate 54b and the colored portion 3b. Will be exposed. On the other hand, as shown in FIG. 3B, when one end of the guard 2 is in the “advance position”, the colored portion 3b is hidden by the side plate 54b and the colored portion 3a is exposed. When the colored portion 3a is completely exposed, the colored portion 3b is completely hidden by the side plate 54b, and when the colored portion 3b is completely exposed, the colored portion 3a becomes the side plate 54b. Is completely hidden by. In other words, the wire sheath stripper 1 has a structure in which only one of the colored portions 3a and 3b is exposed.

Therefore, in the wire sheath stripper 1 of the present invention, the end of the guard 2 can be either the “advanced position” or the “retracted position” simply by confirming which of the colored portions 3a and 3b is exposed. You can instantly know if you are in a state.
That is, according to the present invention, even if the guard 2 is inadvertently moved during the stripping operation of the electric wire coating, it is easy to visually check the position of the guard 2. There is no risk of damaging or scratching the core of the wire. Moreover, since the structure is not complicated even when compared with a conventional wire sheath stripper, it can be manufactured at low cost.

  In this embodiment, the colored portion 3a is red and the colored portion 3b is blue. However, the colors of the colored portions 3a and 3b are not limited to those shown in the present embodiment and can be changed as appropriate. . Moreover, it is good also as a structure which provides only one of the coloring parts 3a and 3b. In addition, when both the colored portions 3a and 3b are provided, it is difficult to overlook the colored portion when the operator visually confirms the position of the guard, compared to the case where only one of the colored portions 3a and 3b is provided. There are benefits.

  INDUSTRIAL APPLICABILITY The present invention can be used when, for example, an operation for branching and connecting electric wires, it is necessary to peel the coating of the electric wires and expose the core wire.

DESCRIPTION OF SYMBOLS 1 ... Electric wire sheath stripper 2 ... Guard 2a ... Elongate hole 3a, 3b ... Colored part 51 ... Electric wire sheath stripper 52 ... Support body 52a ... Holding part 52b ... Mounting part 52c ... Connection part 53 ... Shaft body 53a ... Male Threaded portion 54 ... Blade holder 54a ... Base member 54b ... Side plate 54c ... Connecting rod 55 ... Main blade 56 ... Auxiliary blade 57 ... Arm 58 ... Ditch groove 59 ... Screw ring 60, 61 ... Ring ring 62 ... Recess 63 ... Guard 63a ... long hole 64 ... screw 65 ... coil spring L ... electric wire

Claims (2)

A support body in which the back side of the holding part and the attaching part are connected by a connecting part to form a substantially U shape in side view
A shaft body that is held by the mounting portion so as to be able to advance and retreat with rotation about an axis that is orthogonal to the mounting portion and parallel to the longitudinal direction of the connecting portion;
A blade holder that is attached to one end of the shaft and is installed between the holding portion and the attachment portion,
The blade tip is directed so that a cut can be formed along the length direction and the circumferential direction with respect to the covering of the electric wire installed so as to be parallel to the width direction of the support body between the blade body holder and the holding portion. A main blade and an auxiliary blade attached to the blade holder in a state of being
A guard that is slidably installed along a side plate of the blade holder that is installed so as to cover a part of a side surface of the auxiliary blade,
An "advance position" where one end of the guard can abut against the covering in front of the cutting edge of the auxiliary blade, and an "advance position" where the edge of the auxiliary blade can abut against the covering in front of one end of the guard In the wire sheath stripper in which the guard is installed so as to freely reciprocate between
A wire sheath stripper characterized in that a portion that is visible when one end of the guard is in the “advance position” is colored with respect to a surface of the guard facing the side plate.   Instead of when one end of the guard is in the “advance position” with respect to the opposing surface, or in addition to when the guard is in the “advance position”, the visible portion is colored when in the “retreat position”. The wire sheath stripper according to claim 1, wherein

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