JP6324790B2 - Cover stripping blade - Google Patents

Description

  The present invention relates to a coating stripping blade of a coating stripping tool that strips a coating material of an insulating coated wire from an end portion by a predetermined distance.

  In a composite wire in which a plurality of insulated wires are protected by a sheath, in order to expose the core wire, it is necessary to peel off the sheath (exterior coating) and the individual insulating coating (interior coating) in order. FIG. 9 shows an example of a peeling tool for peeling off the sheath and the insulating coating in order.

  The peeling tool 100 shown in FIG. 9 is a tool that can sandwich a composite wire or an electric wire when the opposing blades 103 are close to each other and can form a cut in a ring shape. 9 (a) and 9 (b), the periphery of the opposed blade 103 of the peeling tool 100 is shown enlarged. FIG. 9C shows the operating state of the peeling tool 100.

  The peeler 100 is formed with four pairs of ring cutting blades 101 and 102. Among these, the two larger ring cutting blades 101 are provided for peeling off the sheath, and the two smaller ring cutting blades 102 are provided for peeling off the insulation coating of the core wire. The reason why the two circular cutting blades 101 and 102 are provided for each of the large and small is to cope with cables having different outer diameters.

  In the case of using the peeling tool 100, first, the sheath is peeled off using the sheath cutting blade 101 that can peel only the sheath of the opposed blade 103. And the some electric wire with which insulation coating remained was peeled off with the ring cutting blade 102 for insulation coating, and a core wire can be exposed.

  When such a tool is used, for example, when a composite wire is wired in an electric device such as an air conditioner or a heater, the sheath is peeled off in accordance with the length of the routed portion in the device, and the length required for terminal connection. Only the insulation coating can be stripped to expose the core wire.

  By the way, there are various forms of the composite wire, and for the purpose of facilitating handling, the insulation coating of the ground wire is joined along the side surface in the longitudinal direction to the composite wire sheath as described above. A composite wire with a ground wire may be used. In such a composite wire with a ground wire, the composite wire side other than the ground wire is covered twice with an insulating coating and a sheath, and the ground wire side is covered only with the insulating coating.

  For this reason, when trying to cut the sheath on the composite wire side using the stripping tool 100 as shown in FIG. 9, the joined ground wire is caught by the end of the ring cutting blade 101 and interferes, Cutting is blocked. Further, if the ground wire and the ground wire are cut off, the insulation coating of the ground wire is peeled off together with the sheath, so that only the ground wire exposes the core wire.

  For this reason, first, a step of separating the ground wire from the composite wire is required. Usually, a blade for vertical cutting is inserted at the boundary between the composite wire and the ground wire integrated, and the both are separated by cutting in the vertical direction. In a state where the ground wire is separated from the composite wire in this way, the sheath and the insulating coating are generally removed in order using the peeling tool 100 as shown in FIG. The insulation coating of the ground wire is also stripped off as much as necessary for terminal connection.

In addition, if a plurality of individual ring cutting blades are provided so that individual wires and ground wires in the composite wire can be accommodated simultaneously, the core wire can be exposed to the individual wires and ground wires in one step. It is possible to shorten the work because it is possible. Note that the skin peeling tool 100 shown in FIG.

Registered Utility Model No. 3030465

  However, the composite wire to which the ground wire is joined requires a step of separating the ground wire from the composite wire, and therefore, the steps are added accordingly. For this reason, when there are many work objects, it becomes complicated and work efficiency falls remarkably.

  Also, in the composite wire with a ground wire that is configured as a weakened portion so that the ground wire can be torn and separated by hand without using a tool, the separation region may be expanded more than necessary. It takes skill to process without.

  Therefore, an object of the present invention is to provide a coating stripping blade capable of easily stripping the exterior coating in a certain processing state in one step regardless of whether or not the ground wire is integrally formed. To do.

  In order to achieve the above object, the coating stripping blade according to the present invention is equipped with a ground wire in which a ground wire coating is joined to an outer sheath of a composite wire in which a plurality of electric wires protected by the inner sheath are bundled with an outer sheath. A coating stripping blade for stripping the coating of the composite wire, wherein the cutting direction is at least at one end of a pair of the exterior ring cutting blade and the exterior ring cutting blade formed to have substantially the same width as the exterior coating. It is characterized by comprising a vertical cutting blade that is arranged substantially at right angles to the outer ring cutting blade and protrudes from the outer ring cutting blade.

  In addition to the above-described configuration, the coating stripping blade of the present invention includes the outer ring cutting blades and the vertical cutting blades at the other end of the outer ring cutting blades that are not provided with the vertical cutting blades. Protruding portions that are abutted so as to form predetermined gaps are formed between them.

  In addition to the above configuration, the coating stripping blade of the present invention is characterized in that the predetermined gap between the vertical cutting blades is formed so that the interval is widened in one direction.

  Further, in addition to the above configuration, the coating stripping blade of the present invention is a plurality of strips formed in a width equivalent to the coating for the interior of the composite wire and the coating for the ground wire, along with the outer cutting blade and the convex portion. A single wire ring cutting blade is further provided.

  As described above, according to the present invention, the outer cutting edge is aligned with the composite electric wire so that the vertical cutting blade is arranged at the boundary between the ground wire and the composite electric wire, and is opposed in this state. When the blades are brought close to each other, a ring-shaped cut is formed in the composite electric wire, and a gap is formed between the ground wire and the composite electric wire by the vertical cutting blade that is cut into the boundary.

As a result, when the counter blade in the joined (closed) state is slid as it is toward the end in the axial direction of the cable as it is, the outer sheath is extracted while tearing apart the joint portion between the ground wire and the composite electric wire. That is, it is possible to easily peel off only the outer sheath of the composite electric wire joined to the ground wire by a series of operations of cutting by clamping and pulling out as it is. Moreover, since joining is divided | segmented only in the area | region from the position where the vertical cutting blade interrupted to the edge part, it can prevent that a ground wire will be separated from a composite electric wire more than necessary.

1 is an overall perspective view of a covering stripper equipped with a covering stripping blade according to an embodiment of the present invention. It is the figure which showed the processing state of the composite wire with a ground wire used as the stripping object by the covering stripper of FIG. It is the figure which decomposed | disassembled the coating stripping blade of FIG. It is the perspective view which showed the state which cut | incised the sheath. It is the schematic seen from the direction where the compound wire with a ground wire extends about the state of Drawing 4. It is the schematic seen from the direction orthogonal to the composite wire with a ground wire about the state of FIG. It is the figure which showed the state from which only the sheath was extracted from the composite wire with an earth wire. It is a figure which shows the state by which the cut | incision was put into the electric wire and the earth wire. It is the figure which showed the conventional peeling tool.

  Hereinafter, an embodiment according to the coating stripping blade of the present invention will be described with reference to the drawings.

  In the covering stripper 1, the two opening / closing plates 6 are configured to be rotatable around a rotation shaft 20. A T-shaped sliding plate 8 is attached to one side of the opening / closing plate 6. The sliding plate 8 is formed with two guide holes 14 arranged vertically in the posture of FIG. The two bolts 12 are fastened to the opening / closing plate 6 through the guide hole 14. Thereby, the T-shaped sliding plate 8 can slide up and down using the two bolts 12 as a guide.

  One side of each pair of the stripping blades 2 and 3 is fastened and fixed to the T-shaped sliding plate 8 with bolts 10. The other side stripping blades 2 and 3 constituting the pair are fastened and fixed to the opening / closing plate 6 with bolts 10 so as to face these. As a result, when the operation lever 4 is gripped, one side of the pair of the stripping blades 2 and 3 together with the sliding plate 8 is lowered, and the opposing blades arranged vertically are close to each other.

  Note that the mechanism of the coating stripper 1 is the same as that of a general configuration that has been widely adopted so far, so only the above description will be given. Hereinafter, the coating stripping blade that is a feature of the present invention will be described. 2 and 3 will be described. However, since the coating stripping blades 2 and 3 are members of different sizes provided according to the difference in the diameter of the electric wire to be worked, only the coating stripping blade 2 will be described in FIG. Yes.

  Before explaining the present invention, first, FIG. 2 shows a composite wire 50 with a ground wire that is a work target of the coating stripping blade 2 according to the present embodiment. FIG. 2 shows the composite wire 51 and the ground wire 53 after processing with the coating stripped together with the separated sheath 51a and insulating coatings 52a and 53a.

  In the composite wire 50 with the ground wire, the ground wire 53 is joined along the longitudinal direction to the sheath 51a of the composite wire 51 in which the two electric wires 52 covered with the insulating coating 52a are bundled by the sheath 51a. Yes. A region indicated by hatching on the side of the sheath 51 a is a bonding region 51 b to which the ground wire 53 is bonded. The coating stripping blade 2 according to the present embodiment is suitable for stripping the sheath 51a of such a grounded composite wire 50.

  FIG. 3 shows one pair (cover stripping blade 2) of the two pairs of stripping blades 2 and 3 attached to the stripping stripper 1 of FIG. 1 in an exploded state. The coating stripping blade 2 is formed in a substantially plate shape, and an outer ring cutting blade 2a for the sheath 51a and an inner ring cutting blade 2c for the insulating coating 52a of the electric wire 52 are arranged at opposite positions. Is formed.

  In the coating stripping blade 2 according to the present embodiment, three pairs of the insulating coating 52a and the ring cutting blade 2c for 53a including the ground wire 53 are formed, so that the two electric wires 52 and the ground wire 53 The insulating coatings 52a and 53a can be peeled side by side at the same time.

  Convex portions 2d and 2e are formed between the ring cutting blade 2a for the sheath 51a and the ring cutting blade 2c for the insulation coatings 52a and 53a and outside the ring cutting blade 2c for the insulation coatings 52a and 53a, respectively. Has been. Of these, the end surface on the convex portion 2d side is formed in a valley shape, and the end surface on the convex portion 2e side is formed in a mountain shape. Therefore, when the coating stripping blade 2 is fastened to the coating stripper 1, the positioning is performed. Is easy.

  In addition, a vertical cutting edge 2b is formed on the outer side of the ring cutting edge 2a for the sheath 51a so that the direction of the blade is substantially perpendicular to the ring cutting edge 2a. On the outer end surface of the vertical cutting edge 2b, an inclined surface is formed which is inclined inwardly toward the blade.

  Next, the function of the covering stripper 1 will be described with reference to FIGS. FIG. 4 shows a state in which the sheath 51a (see FIG. 2) of the composite wire 51 is cut with respect to the composite wire 50 with the ground wire. As shown in FIG. 4, when making a circular cut into the sheath 51 a, the vertical cutting edge 2 b divides the cutting edge into the joint portion (see FIG. 2) between the composite wire 51 and the ground wire 53. It is arranged to put.

  When the operation lever 4 (see FIG. 1) is operated so that the covering stripping blades 2 are brought close to each other in this state, a ring-shaped cut is formed only in the sheath 51a. At the same time, a gap is formed between the composite wire 51 and the ground wire 53 due to the interruption of the vertical cutting edge 2b.

  As described with reference to FIG. 3, the outer surface of the vertical cutting edge 2 b is inclined so as to be concave toward the inner side of the abutted coating stripping blade 2, and as shown in FIG. 4. When the vertical cutting edge 2b is cut into the joint portion, a force acts on the ground wire 53 in a direction away from the composite wire 51. This operation will be described with reference to FIG.

  For convenience of explanation, FIG. 5 omits the illustration of the configuration other than the coating stripping blade 2 and shows only the relationship with the composite wire 50 with the ground wire. As shown in FIG. 5, when a cut is made in the sheath 51a of the composite wire 51 using the ring cutting blade 2a for the sheath 51a, the vertical cutting formed so as to protrude to the opposite side from the ring cutting blade 2a. The blade 2b is cut into a joining region (see FIG. 2) between the ground wire 53 and the composite wire 51. And since the inclined surface is formed in the outer side of the vertical cutting blade 2b, outward force is added to the earth wire 53 by the wedge effect (direction of arrow 80).

  Since the coating stripping blade 2 according to the present embodiment is composed of symmetrical members except for the convex portions 2d and 2e, the ground wire 53 and the two electric wires 52 are arranged in the direction of the force. Work in the same plane. Here, when the interval between the opposing blade cutting blades 2a for the sheath 51a is formed so as to be substantially the same as the outer diameter of the insulating coating 52a of the electric wire 52, the sheath 51a is separated to the end side. In addition, the resistance becomes the smallest.

Moreover, if the space | interval of the vertical cutting blades 2b which oppose is made to protrude to the position which mutually contacts, it will become possible to cut | disconnect the junction part of the earth wire 53 and the sheath 51a completely. But,
A gap may be formed between the blades in the closed state as long as the amount of protrusion is sufficient to pull the ground wire 53 away from the sheath 51a by the wedge action. When the gap is formed in this way, the blade is prevented from being worn and the durability is improved.

  Next, the top view which looked at the state at this time from the cutting direction is shown in FIG. Here too, for the convenience of explanation, the detailed configuration of the covering stripper 1 is not shown, and only the position of the ring cutting blade 2a for the sheath 51a is conceptually shown. According to FIG. 6, the ring cutting edge 2 a and the vertical cutting edge 2 b are shown as L-shaped portions with diagonal lines. As shown in FIG. 5, in the state in which the ring cutting blade 2a is cut into the sheath 51a, the vertical cutting blade 2b cuts between the ground wire 53 and the composite wire 51. The surrounding ground wire 53 receives an outward force (the direction of the arrow 80 in the figure). In this case, although the effect is the same as that of the ground wire 53 being bypassed, a force that is drawn toward the vertical cutting edge 2b is generated in a part of the end side (the direction of the arrow 82).

  Here, as shown in FIG. 3, the cross section of the ring cutting blade 2 a is formed in a wedge shape like the vertical cutting blade 2 b. The wedge-shaped inclined surface is formed on the side where the vertical cutting edge 2b is provided. Since it is formed in this way, when the ring cutting blade 2a is cut into the sheath 51a of the composite wire 51, the sheath 51a is slightly moved in the direction toward the end (arrow 83) due to the wedge effect. Power is added. That is, by simultaneously cutting the ring cutting blade 2a and the vertical cutting blade 2b of the coating stripping blade 2, a shearing force is generated between the ground wire 53 and the sheath 51a in a direction opposite to the longitudinal direction. Can do.

  As a result, a slight shift occurs in the joining portion in the region from the position where the ring cutting blade 2a is cut to the end portion, and the joining is loosened. When the operation lever 4 is further narrowed in this state, the opening / closing plate 6 (see FIG. 1) of the covering stripper 1 is opened, so that the sheath 51a is pushed out along the two electric wires 52 to the end side.

  At this time, since the bonding between the ground wire 53 and the sheath 51a has already become loose, the sheath 51a can be smoothly extracted without receiving a large resistance. Except for the region where the vertical cutting edge 2b is interrupted, the ground wire 53 does not have excessive force in the peeling direction, so that the deformation of the ground wire 53 can be minimized and the vertical wire 2b can be minimized. Since looseness of joining is formed only on the end side from the position where the cutting edge 2b is interrupted, there is no variation in the separation region of joining. As described above, when the coating stripping blade 2 according to the present embodiment is used, it is possible to strip only the sheath 51a accurately and in a good state only by a series of operations without requiring skill.

  FIG. 7 shows a state in which only the sheath 51a is extracted toward the end side by a series of operations. As described above, the sheath 51a can be extracted (stripped) to the end without applying unnecessary force to the ground wire 53, so that the two electric wires 52 and the ground wire 53 after the sheath 51a are removed are approximately. The parallel relationship is maintained, and later work becomes easy.

  FIG. 8 shows a state in which the insulating coatings 52a and 53a of the ground wire 53 and the two electric wires 52 are simultaneously cut by the ring cutting blade 2c for the insulating coatings 52a and 53a. As described above, even after the sheath 51a is extracted, the approximately three wires (the electric wire 52 and the ground wire 53) are arranged in parallel. It is possible to make a smooth transition to work.

  As described above, when the coating stripping blades 2 and 3 according to the present invention are used, the coating stripping operation of the composite wire 50 with the ground wire is facilitated, so that the working efficiency is improved and the processing accuracy is also improved. be able to.

  In the above-described embodiment, the ring cutting blade for the sheath and the vertical cutting blade have been shown as an example of a configuration formed by an integral plate member, but each has a thickness that sufficiently produces a wedge effect, And if it is arrange | positioned at a substantially right angle mutually, even if comprised by another member, it is possible to acquire the same effect.

  Further, in the above-described embodiment, the configuration in which the vertical cutting blade is opposed to each of the pair of coating stripping blades is shown as an example, but the vertical cutting blade is provided on at least one side. If so, a notch can be formed between the ground wire and the sheath. For example, one can be configured as a vertical cutting blade and the other as a receiving portion protruding to a position facing the vertical cutting blade. I do not care.

  Further, in the above-described embodiment, the configuration in which the insulating cutting ring cutting blade for stripping the insulating coating of the individual electric wires is formed along with the sheath cutting blade is shown as an example. However, a configuration in which these ring cutting blades are not juxtaposed with the sheath ring cutting blades may be employed.

  Further, in the above-described embodiment, the interval between the vertical cutting blades facing each other is illustrated so as to be a substantially parallel interval, and although not described in detail in the text, as the distance from the ring cutting blade for the sheath increases. When it is formed so as to gradually widen the gap (toward one direction), resistance can be reduced when sliding the coating stripping blade toward the end, so that the sheath can be stripped more smoothly. Can be done. Further, with respect to the vertical cutting blade, if the blade is formed not only on the opposite side but also in the traveling direction, the resistance can be further reduced.

  According to the coating stripping blade of the present invention, it is possible to complete a series of operations without changing the cable in the sheath cutting process and the sheath extracting process after the ring cutting. It is useful not only for hand-held tools but also for automatic coating stripping devices.

1 Coating stripper 2, 3 Coating stripping blade 2a Ring cutting blade 2b Vertical cutting blade 2c Ring cutting blade (for single wire)
2d, 2e Convex 4 Operation lever 6 Opening / closing plate 8 Sliding plate 10, 12 Bolt 14 Guide hole 16 Link member 18 Holding portion 20 Rotating shaft 50 Composite wire 51 with ground wire Composite wire 51a Sheath (exterior covering)
51b Joining region 52 Electric wire 52a Insulation coating (interior coating)
53 Ground wire 53a Insulation coating (interior coating)

Claims (4)

A coating stripping blade for stripping the coating of the grounded composite wire in which the coating of the ground wire is joined to the exterior coating of the composite wire in which a plurality of electric wires protected by the interior coating are bundled with the exterior coating,
An outer cutting blade formed to have substantially the same width as the outer covering;
At least one end of the pair of outer ring cutting blades, the cutting direction is arranged substantially perpendicular to the outer ring cutting blade, and a vertical cutting blade protruding from the outer ring cutting blade;
A coating stripping blade characterized by comprising:   A predetermined gap is formed between the outer cutting blades and the vertical cutting blades at the other end of the outer cutting blades where the vertical cutting blades are not provided. The covering stripping blade according to claim 1, wherein a projecting portion to be abutted is formed.   The coating stripping blade according to claim 2, wherein the predetermined gap between the vertical cutting blades is formed so that a gap is widened in one direction. A plurality of single-wire ring cutting blades formed in a width equivalent to the interior coating of the composite wire and the coating of the ground wire, in addition to the outer ring cutting blade and the convex portion, The coating stripping blade according to claim 2 or 3.