Wire cutting stripper

Abstract

To provide a wire cutting stripper that can simultaneously cut and strip the insulation of a multi-core electric wire.SOLUTION: A wire cutting stripper 10 has a side pliers shape and includes upper and lower handles 10a, 10b having left crossing portions 13aL, 13bL and right crossing portions 13aR, 13bR extending forward and parallel to each other, and horizontally symmetrical upper and lower jaws 14bL, 14aL and right upper and lower jaws 14bR, 14aR arranged parallel to each other. The wire is clamped and cut between the upper and lower jaws equipped with the left upper and lower cutting parts 20b, 20a and the right upper and lower jaws equipped with the right upper and lower cutting part 21b. The outer sheath of the wire is cut by the outer sheath cutting blades 20bc, 20ac of the left upper and lower cutting part, while the outer sheath and insulating sheath are cut by an insulating sheath cutting blade 21bc1 of the right upper and lower cutting part, and the wire is severed by a core cutting blade 21bc2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION An embodiment of the present invention relates to an electrical wire cutting stripper. [Background technology]

[0002] 2. Description of the Related Art Conventionally, for example, in electrical work, a worker uses nippers to cut an electric wire and a stripper to strip the insulation of the cut electric wire.

[0003] In this process, the worker must switch between nippers and strippers to process the target wire, which is not only tedious and time-consuming, but also difficult to achieve a consistent finish for each wire.

[0004] Therefore, a tool has been devised that allows the work of cutting an electric wire and the work of stripping the covering material to be performed simultaneously (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-092249 Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional tools, the cutting blades for the electric wire (electric wire cutting blades) and the cutting blades for the coating material (coating material cutting blades) are both scissor-shaped and are arranged in parallel at intervals corresponding to the length of the coating material to be stripped.By closing the electric wire cutting blades and the coating material cutting blades in a scissor-like manner in conjunction with each other, the electric wire and the coating material are simultaneously cut at the corresponding predetermined positions of each cutting blade.

[0007] For this reason, while conventional tools can simultaneously cut and strip the insulation of a single-core electric wire, they cannot simultaneously cut and strip the insulation of an electric wire with multiple core wires.

[0008] The problem to be solved by the present invention is to provide a wire cutting stripper that can simultaneously cut and strip the insulation of a wire having multiple core wires. [Means for solving the problem]

[0009] The wire cutting stripper of the embodiment includes: A wire cutting stripper for a wire having multiple core wires, a first upper and lower jaw portion that opens and closes in conjunction with the opening and closing of the pair of handle portions operated by a user; a second upper and lower jaw portion that opens and closes in a direction parallel to and at a position parallel to the first upper and lower jaw portion; upper and lower outer covering cutting blades that are provided on opposing surfaces of the first upper and lower jaws, respectively, and that cut the outer covering of the electric wire that is arranged from between the first upper and lower jaws to between the second upper and lower jaws in a direction perpendicular to the opening and closing direction, while leaving a core wire and an insulating covering of the electric wire, from above and below the electric wire as the first upper and lower jaws close; upper and lower insulating covering cutting blades that are provided on opposing surfaces of the second upper and lower jaws, respectively, and that cut the outer covering and the insulating covering of the electric wire that is disposed between the first upper and lower jaws and the second upper and lower jaws from above and below the electric wire while leaving a core wire of the electric wire as the second upper and lower jaws close; upper and lower core cutting blades are provided on opposing surfaces of the second upper and lower jaw portions at positions spaced apart by a certain distance from the upper and lower insulating coating cutting blades in a direction away from the first upper and lower jaw portions, and cut the electric wire arranged between the first upper and lower jaw portions and the second upper and lower jaw portions from above and below; It is equipped with the following. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are diagrams showing the external configuration of an electric wire cutting stripper 10 according to an embodiment, in which FIG. 1A is a left side view and FIG. 1B is a top view. [Figure 2]1 is a top view showing the configuration of the electric wire cutting stripper 10 with the left and right upper jaws 14bL and 14bR omitted and a portion of the base 11a cut away. [Figure 3] 1A and 1B are diagrams showing the structure of an electric wire 30 (here, two cores) having multiple cores, which is the object to be processed by the electric wire cutting stripper 10, in which FIG. 1A is a plan view thereof, FIG. 1B is a front view thereof, and FIG. 1C is a plan view showing an example of the state after processing. [Figure 4] 1A and 1B are diagrams showing the configuration of the lower left cutting part 20a and upper left cutting part 20b of the electric wire cutting stripper 10, in which FIG. 1A is a left side view, FIG. 1B is a top view of the lower left cutting part 20a as viewed from the X1-X1 line in FIG. 1A, and FIG. 1C is a cross-sectional view along the Y1-Y1 line in FIG. 1A. [Figure 5] 1A and 1B are diagrams showing the configuration of the lower right cutting part 21a and the upper right cutting part 21b of the wire cutting stripper 10, in which FIG. 1A is a left side view, FIG. 1B is a top view of the lower right cutting part 21a as seen from the arrows X2-X2 in FIG. 1A, and FIG. 1C is a cross-sectional view taken along the line Y2-Y2 in FIG. 1A. [Figure 6] 10 is a diagram illustrating a state in which an electric wire 30 has been processed (cut) by the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the electric wire cutting stripper 10. FIG. [Figure 7] 7 is a partial cross-sectional view taken along the arrow ZZ in FIG. 6, illustrating the state in which the electric wire 30 has been processed (cut) by the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the electric wire cutting stripper 10. FIG. [Figure 8] 1A and 1B are diagrams for explaining the left upper and lower part mounting portions 18bL, 18aL and the right upper and lower part mounting portions 18bR, 18aR when the left and right upper and lower cutting parts 20b, 20a and 21a, 21b of the wire cutting stripper 10 have been removed, with FIG. 1A being a left side view showing the external configuration, and FIG. 1B being a top view showing the left and right upper jaw portions 14bL, 14bR omitted. [Figure 9]A left side view showing the external configuration to explain the installation or replacement of the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a to the left upper and lower part mounting parts 18bL, 18aL and the right upper and lower part mounting parts 18bR, 18aR of the wire cutting stripper 10. [Figure 10] 1(B) is an enlarged view of part E in FIG. 1(B) illustrating the relationship between the four screws 15 and the adjustment nuts 17a and 17b that are passed from the right upper and lower jaws 14bR and 14aR to the left upper and lower jaws 14bL and 14aL4 to adjust the distance De between the left upper and lower jaws 14bL and 14aL and the right upper and lower jaws 14bR and 14aR of the wire cutting stripper 10. [Figure 11] 1 is a top view showing an operation (part 1) of the wire cutting stripper 10 for processing (cutting) a wire 30 having multiple cores. FIG. [Figure 12] 10 is a top view showing the operation (part 2) of the wire cutting stripper 10 for processing (cutting) the wire 30 having multiple cores. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] (Configuration and Function of the Embodiment) FIG. 1 shows the external configuration of an electric wire cutting stripper 10 according to an embodiment, in which (A) is a left side view thereof and (B) is a top view thereof.

[0013] In FIG. 1, it is assumed that the left side of the drawing is the front (front part) of the electric wire cutting stripper 10, and the right side is the rear (rear part).

[0014] As shown in FIG. 1(A), the wire cutting stripper 10 has a pliers-like appearance when viewed from the side, and is provided with a pair of upper and lower handles 10a, 10b at the rear thereof.

[0015] Here, the upper and lower sides of the electric wire cutting stripper 10 are defined as the upper and lower sides when an operator (user) holds the pair of handles 10a, 10b for operation.

[0016] As shown in FIG. 1(B), the front ends of the upper and lower handles 10a and 10b are formed as bases 11a and 11b that widen forward in a flat trapezoidal shape, and to the left of the front end of each base 11a and 11b, as shown in FIG. 1(A), a pair of left lower jaw 14aL (first lower jaw) and left upper jaw 14bL (first upper jaw) are provided, which extend forward in parallel and vertically via left crossing sections 13aL and 13bL that cross each other vertically and then invert forward.

[0017] The left lower jaw 14aL and the left upper jaw 14bL open and close in conjunction with the opening and closing operations of the upper and lower handle portions 10a and 10b, with the cross axis 12, which is provided at the fulcrum and penetrates left and right at the intersection center of the left intersection portions 13aL and 13bL, acting as a fulcrum, to clamp the workpiece between them.

[0018] Further, to the right of the front ends of the bases 11a and 11b, as shown in FIG. 1(B), right intersection portions 13aR and 13bR and right mandibular portion 14aR (second mandibular portion) and right mandibular portion 14bR (second maxillary portion) similar to the left intersection portions 13aL and 13bL and the left mandibular portion 14aL and the left maxillary portion 14bL are provided in parallel and in line with the left intersection portions 13aL and 13bL and the left mandibular portion 14aL and the left maxillary portion 14bL.

[0019] Like the left lower jaw 14aL and left upper jaw 14bL, the right lower jaw 14aR and right upper jaw 14bR also open and close in conjunction with the opening and closing operations of the upper and lower handle portions 10a, 10b, using the cross axis 12 as a fulcrum, and operate to clamp the workpiece between them.

[0020] That is, the left and right lower jaws 14aL, 14aR and the left and right upper jaws 14bL, 14bR all open and close simultaneously in parallel and in tandem with the opening and closing operations of the upper and lower handles 10a, 10b, and operate so as to simultaneously clamp the workpiece between them.

[0021] FIG. 2 is a top view showing the configuration of the electric wire cutting stripper 10 with the left and right upper jaws 14bL and 14bR omitted and a portion of the base 11a cut away.

[0022] The right crossing portions 13aR, 13bR where the right lower jaw 14aR and the right upper jaw 14bR of the wire cutting stripper 10 are provided are fixed by embedding their rear ends 13KR into the bases 11a, 11b of the upper and lower handles 10a, 10b.

[0023] On the other hand, the rear end portion 13KL of the left intersection portion 13aL, 13bL, where the left lower jaw portion 14aL and the left upper jaw portion 14bL are provided, is engaged with a slide shaft 11B arranged in the left-right direction in a space 11S within the bases 11a, 11b, which has an opening on the front surface of the bases 11a, 11b, relative to the bases 11a, 11b of the upper and lower handle portions 10a, 10b, and is attached so as to be slidable in the left-right direction (the direction in which the distance from the right intersection portion 13aR, 13bR increases or decreases).

[0024] As shown in Figures 1 and 2, screws 15 are provided at four locations in total: two locations in front and behind the left and right lower jaws 14aL, 14aR and two locations in front and behind the left and right upper jaws 14bL, 14bR. The screws 15 penetrate from the right side surface of the right upper and lower jaws 14bR, 14aR (second upper and lower jaws) to the left side surface of the left upper and lower jaws 14bL, 14aL (first upper and lower jaws).

[0025] Each screw 15 has a screw head 15h fixed to the right side surface of the right upper and lower jaw portions 14bR, 14aR, and is fixed to the right upper and lower jaw portions 14bR, 14aR by a fixing nut 16 threaded onto the left side surface of the right upper and lower jaw portions 14bR, 14aR.

[0026] On the other hand, adjustment nuts 17a, 17b are threaded onto each screw 15 passing through the left upper and lower jaws 14bL, 14aL at the right and left sides of the left upper and lower jaws 14bL, 14aL, respectively, to adjust the left-right position of the left upper and lower jaws 14bL, 14aL relative to the screws 15, and the distance between the right upper and lower jaws 14bR, 14aR and the left upper and lower jaws 14bL, 14aL can be adjusted while maintaining parallelism.

[0027] In other words, when the distance between the left upper and lower jaw portions 14bL, 14aL and the right upper and lower jaw portions 14bR, 14aR is adjusted using the four adjustment nuts 17a, 17b, the left intersection portions 13aL, 13bL also slide along the intersection axis 12 and the slide axis 11B, changing the distance between them and the right intersection portions 13aR, 13bR.

[0028] As shown in FIG. 1, the upper surface of the base 11a to which the left intersection 13aL and the right intersection 13aR, which are located on the upper side of the handles 10a and 10b, of the left and right intersections 13aL, 13bL and 13aR, 13bR, are attached, is provided with a scale M for measuring the adjustable distance (Ds+De or De, etc.) between the right upper and lower jaws 14bR, 14aR and the left upper and lower jaws 14bL, 14aL in the left-right direction along the edge of the front end, i.e., in the direction perpendicular to the direction in which the right upper and lower jaws 14bR, 14aR and the left upper and lower jaws 14bL, 14aL open and close.

[0029] On the upper surfaces of the left and right lower jaw portions 14aL, 14aR, there are provided identical U-shaped left lower part attachment portions 18aL and right lower part attachment portions 18aR, each of which is formed with the U-shaped opening facing up when viewed from the left or right side.

[0030] In addition, on the underside of each of the left and right upper jaws 14bL, 14bR, there are U-shaped upper left part mounting portions 18bL and upper right part mounting portions 18bR, which are formed with the U-shaped opening downward when viewed from the left and right side, and which have the same shape and are arranged vertically symmetrically with respect to the lower left part mounting portions 18aL and lower right part mounting portions 18aR of the left and right lower jaws 14aL, 14aR.

[0031] The lower left part mounting portion 18aL and the upper left part mounting portion 18bL are respectively equipped with a lower left cutting part 20a (first lower cutting part) and an upper left cutting part 20b (first upper cutting part) (see Figure 4) that are detachably and replaceably attached to clamp and cut the outer coating 31 of an electric wire 30 (see Figure 3) having multiple core wires, which is the object to be processed by the electric wire cutting stripper 10, from above and below.

[0032] In addition, the lower right part mounting portion 18aR and the upper right part mounting portion 18bR are respectively equipped with a lower right cutting part 21a (second lower cutting part) and an upper right cutting part 21b (second upper cutting part) (see Figure 5) that are detachably and replaceably attached to clamp and cut the outer coating 31 and insulating coatings 32a, 32b of the electric wire 30 (see Figure 3), which is the object to be processed, from above and below, and at the same time clamp and cut the entire electric wire 30, including the outer coating 31 and core wires 33a, 33b, from above and below.

[0033] FIG. 3 shows the structure of an electric wire 30 having multiple core wires (here, two cores) that is the object to be processed by the electric wire cutting stripper 10, where FIG. 3(A) is a plan view thereof, FIG. 3(B) is a front view thereof, and FIG. 3(C) is a plan view showing an example of the processed state.

[0034] The electric wire 30 having a plurality of core wires is configured such that the parallel arranged core wires 33a, 33b are covered with respective insulating coatings 32a, 32b, and the insulating coatings 32a, 32b are covered with an outer coating 31.

[0035] The number of cores of the electric wire 30, which is the workpiece of the embodiment, is not limited to two, but may be three or more.

[0036] FIG. 4 shows the configuration of the lower left cutting part 20a and the upper left cutting part 20b of the wire cutting stripper 10, where FIG. 4(A) is a left side view, FIG. 4(B) is a top view of the lower left cutting part 20a as seen from the arrows along line X1-X1 in FIG. 4(A), and FIG. 4(C) is a cross-sectional view along line Y1-Y1 in FIG. 4(A).

[0037] The lower left cut part 20a and the upper left cut part 20b are both rectangular in appearance and fit symmetrically with good dimensional accuracy into the lower left part attachment portion 18aL of the lower left jaw 14aL and the upper left part attachment portion 18bL of the upper left jaw 14bL.

[0038] FIG. 5 is a diagram showing the configuration of the lower right cutting part 21a and the upper right cutting part 21b of the electric wire cutting stripper 10, in which FIG. 5(A) is a left side view, FIG. 5(B) is a top view of the lower right cutting part 21a as seen from the arrows along line X2-X2 in FIG. 5(A), and FIG. 5(C) is a cross-sectional view along line Y2-Y2 in FIG. 5(A).

[0039] The lower right cut part 21a and the upper right cut part 21b are both rectangular in appearance and fit symmetrically into the lower right part attachment portion 18aR of the lower right jaw 14aR and the upper right part attachment portion 18bR of the upper right jaw 14bR with high dimensional accuracy.

[0040] The electric wire 30, which is the object to be processed, is arranged transversely in the left-right direction perpendicular to the front-to-back direction of the electric wire cutting stripper 10 so that it is simultaneously clamped between the left and right lower jaws 14aL, 14aR and the left and right upper jaws 14bL, 14bR, to which the respective cutting parts 20a, 20b and 21a, 21b are attached (see Figure 11), and is simultaneously processed by the lower left cutting part 20a and the upper left cutting part 20b and the lower right cutting part 21a and the upper right cutting part 21b.

[0041] As shown in FIG. 4, on the left side surfaces of the lower left cutting part 20a and the upper left cutting part 20b, there are provided, in vertical symmetry, a lower outer covering cutting blade 20ac and an upper outer covering cutting blade 20bc for clamping and cutting the outer covering 31 of the electric wire 30 from above and below.

[0042] The area from the inside of the cutting blades 20ac, 20bc of each cutting part 20a, 20b to the right side is formed as a hollow wire enclosing portion 20s and its opening 20w that encloses the wire 30 after the outer sheath 31 of the wire 30 has been cut.

[0043] In addition, on the left and right sides of each cutting part 20a, 20b, wire guides 22 for guiding the sides of the wire 30 are erected at positions spaced apart by a width corresponding to the wire enclosing portion 20s and its opening 20w.

[0044] As shown in Figure 5, on the left side of the lower right cutting part 21a and the upper right cutting part 21b, a lower insulating coating cutting blade 21ac1 and an upper insulating coating cutting blade 21bc1 are provided, each symmetrically, for clamping and cutting the outer coating 31 and insulating coatings 32a and 32b of the electric wire 30 from above and below.

[0045] Furthermore, on the right side of the lower right cutting part 21a and the upper right cutting part 21b, a lower core cutting blade 21ac2 and an upper core cutting blade 21bc2 are provided, each arranged symmetrically above and below, for clamping and cutting the entire wire 30 from the outer coating 31 to the insulating coatings 32a, 32b and the core wires 33a, 33b from above and below.

[0046] Similar to the left cutting parts 20a, 20b, the space between the insulating coating cutting blade 21ac1, 21bc1 and the core wire cutting blade 21ac2, 21bc2 of the right cutting parts 21a, 21b is formed as a hollow wire enclosing portion 20s that encloses the wire 30 when the wire 30 is cut by the core wire cutting blade 21ac2, 21bc2.

[0047] Similarly to the left cutting parts 20a, 20b, wire guides 22 for guiding the sides of the wire 30 are erected on the left and right sides of the right cutting parts 21a, 21b at positions spaced apart by a width corresponding to the wire enclosing portion 20s.

[0048] As shown in Figure 4, the mounting surfaces of the lower left cut part 20a and the upper left cut part 20b, which are respectively attached to the lower left part mounting portion 18aL and the upper left part mounting portion 18bL (see Figure 8), are provided with mounting protrusions 23 that fit into the continuous U-shaped mounting grooves 19 of each part mounting portion 18aL, 18bL.

[0049] Similarly, as shown in FIG. 5, the mounting surfaces of the lower right cut part 21a and the upper right cut part 21b relative to the lower right part mounting portion 18aR and the upper right part mounting portion 18bR (see FIG. 8) are also provided with mounting protrusions 23 that fit into the continuous U-shaped mounting grooves 19 of each part mounting portion 18aR, 18bR.

[0050] The mounting protrusions 23 of the lower left cut part 20a, the upper left cut part 20b, the lower right cut part 21a, and the upper right cut part 21b are configured as magnets and are attached by attraction to the mounting grooves 19 of the lower left part mounting part 18aL, the upper left part mounting part 18bL, the lower right part mounting part 18aR, and the upper right part mounting part 18bR.

[0051] The mounting surfaces of the cutting parts 20a, 20b, 21a, and 21b and the part mounting portions 18aL, 18bL, 18aR, and 18bR may be configured as magnets to attract and mount them to each other.

[0052] FIG. 6 is a diagram illustrating a state in which the electric wire 30 has been processed (cut) by the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the electric wire cutting stripper 10.

[0053] 7 is a partial cross-sectional view taken along the arrow ZZ in FIG. 6, illustrating the state in which the electric wire 30 has been processed (cut) by the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the electric wire cutting stripper 10.

[0054] 6 and 7 show the state in which the electric wire 30 is processed (cut) with the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the electric wire cutting stripper 10 removed.

[0055] That is, for example, as shown in Figures 1 and 2, a two-core electric wire 30 is pulled and positioned between the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a attached to the left upper and lower jaw parts 14bL, 14aL and the right upper and lower jaw parts 14bR, 14aR of the electric wire cutting stripper 10, along the respective electric wire guides 22, and, for example, by an operator gripping and closing the upper and lower handle parts 10a, 10b, the electric wire 30 is simultaneously clamped between the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a.

[0056] As a result, as shown in Figures 6 and 7, the outer sheath 31 is cut at the positions of the outer sheath cutting blades 20bc, 20ac of the left upper and lower cutting parts 20b, 20a, and at the same time, the outer sheath 31 and the two-core insulating sheaths 32a, 32b are cut at the positions of the insulating sheath cutting blades 21bc1, 21ac1 of the right upper and lower cutting parts 21b, 21a, and the entire electric wire 30 from the outer sheath 31 to the two-core insulating sheaths 32a, 32b and core wires 33a, 33b is cut at the positions of the core wire cutting blades 21bc2, 21ac2.

[0057] Then, for example, an operator grasps the unprocessed portion of the electric wire 30 in front of the left upper and lower jaw portions 14bL, 14aL of the electric wire cutting stripper 10, and while still holding the upper and lower handle portions 10a, 10b, pulls and moves the left and right upper and lower jaw portions 14bL, 14aL and 14bR, 14aR toward the tip where the electric wire 30 has been processed (cut).

[0058] Then, as shown by arrow A, the outer sheath 31 of the electric wire 30 peels off from the position of the outer sheath cutting blades 20bc, 20ac of the left upper and lower cutting parts 20b, 20a, and at the same time, as shown by arrow B, the two-core insulating sheath 32a, 32b peels off from the position of the insulating sheath cutting blades 21bc1, 21ac1 of the right upper and lower cutting parts 21b, 21a, and further, as shown by arrow C, the entire electric wire 30 including the two core wires 33a, 33b is cut and separated from the position of the core wire cutting blades 21bc2, 21ac2 of the right upper and lower cutting parts 21b, 21a.

[0059] Here, the distance from the position of the outer sheathing cutting blades 20bc, 20ac of the left upper and lower cutting parts 20b, 20a to the position of the core wire cutting blades 21bc2, 21ac2 of the right upper and lower cutting parts 21b, 21a (corresponding to the position of the left side surface of the left upper and lower jaws 14bL, 14aL to the position of the right side surface of the right upper and lower jaws 14bR, 14aR) corresponds to the stripping width (Ds+De) of the outer sheathing 31, and as shown in Figures 1 and 2, the stripping width (Ds+De) can be adjusted by checking the scale M marked on the top surface of the base 11a using adjustment nuts 17a, 17b of four screws 15 that connect the right upper and lower jaws 14bR, 14aR to the left upper and lower jaws 14bL, 14aL4.

[0060] The distance from the insulating coating cutting blades 21bc1, 21ac1 to the core wire cutting blades 21bc2, 21ac2 of the right upper and lower cutting parts 21b, 21a (corresponding to the width of the right upper and lower jaws 14bR, 14aR) corresponds to the stripping width Ds of the insulating coatings 32a, 32b.

[0061] 4 and 5 are shown as being configured for use with a two-core electric wire 30. However, even when used with an electric wire 30 having three or more cores (n core), for example, the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a for two cores can be replaced with left upper and lower cutting parts (not shown) having an outer coating cutting blade for an n-core and right upper and lower cutting parts (not shown) having an insulating coating cutting blade and a core wire cutting blade for an n-core, and the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a for two cores can be prepared in advance, and the wire cutting stripper 10 can be used to process (cut) an n-core electric wire 30 in the same manner as described above.

[0062] Figure 8 is a diagram for explaining the left upper and lower part mounting portions 18bL, 18aL and the right upper and lower part mounting portions 18bR, 18aR when the left and right upper and lower cutting parts 20b, 20a and 21a, 21b of the wire cutting stripper 10 have been removed, Figure 8(A) is a left side view showing the external configuration, and Figure 8(B) is a top view showing the left and right upper jaw portions 14bL, 14bR omitted.

[0063] Figure 9 is a left side view showing the external configuration for explaining the installation or replacement of the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a to the left upper and lower part mounting parts 18bL, 18aL and the right upper and lower part mounting parts 18bR, 18aR of the wire cutting stripper 10.

[0064] That is, as shown in FIG. 8, the U-shaped part mounting surfaces of the left upper and lower part mounting portions 18bL, 18aL and the right upper and lower part mounting portions 18bR, 18aR are each provided with a mounting groove 19 that runs continuously along the U-shape, and as shown by arrows a and b in FIG. 9, the lower left cutting part 20a, the upper left cutting part 20b, the lower right cutting part 21a, and the upper right cutting part 21b are each attached so that the U-shaped mounting protrusions 23 provided along each mounting surface are fitted into the opposing mounting grooves 19 and attracted by magnets, thereby allowing the respective cutting parts 20a, 20b and 21a, 21b to be detachably and interchangeably attached according to the number of core wires of the electric wire 30, which is the object to be processed.

[0065] In the embodiment, the mounting grooves 19 are provided along the part mounting surfaces of the part mounting portions 18bL, 18aL and 18bR, 18aR, and the mounting protrusions 23 are provided along the mounting surfaces of the cut parts 20a, 20b and 21a, 21b, but the configuration may be reversed, where the mounting grooves 19 are provided along the mounting surfaces of the cut parts 20a, 20b and 21a, 21b, and the mounting protrusions 23 are provided along the part mounting surfaces of the part mounting portions 18bL, 18aL and 18bR, 18aR.

[0066] Figure 10 is a diagram explaining the relationship between the four screws 15 and the adjustment nuts 17a, 17b that are passed from the right upper and lower jaws 14bR, 14aR to the left upper and lower jaws 14bL, 14aL4 to adjust the distance De between the left upper and lower jaws 14bL, 14aL and the right upper and lower jaws 14bR, 14aR of the wire cutting stripper 10, and is an enlarged view of part E in Figure 1(B).

[0067] That is, as shown in Figures 1 and 2, each of the screws 15 provided at four locations, two locations in front and behind the left and right lower jaws 14aL, 14aR and two locations in front and behind the left and right upper jaws 14bL, 14bR, has a screw head 15h fixed to the right side surface of the right upper and lower jaws 14bR, 14aR, as shown in Figure 10, and is fixed to the right upper and lower jaws 14bR, 14aR by a fixing nut 16 screwed onto the left side surface of the right upper and lower jaws 14bR, 14aR.

[0068] The adjustment nuts 17a, 17b are threaded onto the right and left sides of the left upper and lower jaws 14bL, 14aL, respectively, to adjust the distance De between the left upper and lower jaws 14bL, 14aL and the right upper and lower jaws 14bR, 14aR, as shown by arrows a1, a2, thereby adjusting the stripping width (Ds+De) of the outer coating 31 of the electric wire 30, as shown in Figures 6 and 7.

[0069] Here, the mechanism for adjusting the distance between the right upper and lower jaws 14bR, 14aR and the left upper and lower jaws 14bL, 14aL4 is configured by using four screws 15 and adjustment nuts 17a, 17b that are connected from the right upper and lower jaws 14bR, 14aR to the left upper and lower jaws 14bL, 14aL4 to slide the left upper and lower jaws 14bL, 14aL4 along the cross axis 12 and slide axis 11B of the left crossing portions 13aL, 13bL, thereby adjusting the distance between the right upper and lower jaws 14bR, 14aR and the left upper and lower jaws 14bL, 14aL, and this is referred to as the exterior coating stripping width adjustment mechanism.

[0070] (Processing (cutting) procedure for the electric wire 30) FIG. 11 is a top view showing an operation (part 1) of the wire cutting stripper 10 in processing (cutting) the wire 30 having multiple cores.

[0071] FIG. 12 is a top view showing an operation (part 2) of the wire cutting stripper 10 in processing (cutting) the wire 30 having multiple cores.

[0072] Here, it is assumed that the width of each of the left and right upper and lower jaws 14bL, 14aL and 14bR, 14aR of the electric wire cutting stripper 10 is 5 mm, and that the width of each of the left and right upper and lower cutting parts 20b, 20a and 21a, 21b that are prepared in advance and attached to the upper and lower jaws 14bL, 14aL and 14bR, 14aR is also 5 mm. It is also assumed that the electric wire 30 to be processed has two cores.

[0073] (1) The operator selects two-core upper and lower cutting parts 20b, 20a (see Figure 4) and 21b, 21a (see Figure 5) for the part mounting parts 18bL, 18aL and 18bR, 18aR of the left and right upper and lower jaw parts 14bL, 14aL and 14bR, 14aR of the electric wire cutting stripper 10, respectively, and attaches the selected upper and lower cutting parts 20b, 20a and 21b, 21a by fitting the mounting protrusions 23 on the cutting parts 20b, 20a, 21b, 21a into the mounting grooves 19 on the part mounting parts 18bL, 18aL, 18bR, 18aR, as shown in Figure 9.

[0074] (2) The operator loosens adjustment nuts 17a and 17b of four screws 15 extending from right jaws 14bR and 14aR to left jaws 14bL and 14aL4, and adjusts the distance De between left jaws 14bL and 14aL and right jaws 14bR and 14aR as shown by arrows a1 and a2 in Fig. 10. While checking scale M on base 11a, the operator adjusts the stripping width (Ds+De) of outer coating 31 of wire 30 to, for example, 30 mm. Then, the operator retightens adjustment nuts 17a and 17b along left jaws 14bL and 14aL4 to fix distance De between right jaws 14bR and 14aR and left jaws 14bL and 14aL.

[0075] (3) The operator passes the electric wire 30 between the left upper and lower cutting parts 20b, 20a attached to the left upper and lower jaw parts 14bL, 14aL and the right upper and lower jaw parts 14bR, 14aR and between the right upper and lower cutting parts 21b, 21a, and pulls and clamps the electric wire 30 along the electric wire guides 22 of each cutting part 20b, 20a, 21b, 21a as shown in FIG. 11 , and then firmly grips the upper and lower handle parts 10a, 10b to cut the electric wire 30.

[0076] At this time, as shown in Figures 6 and 7, the outer sheath 31 of the electric wire 30 is cut at the positions of the outer sheath cutting blades 20bc, 20ac of the left upper and lower cutting parts 20b, 20a, and at the same time, the outer sheath 31 and the insulating sheaths 32a, 32b are cut at the positions of the insulating sheath cutting blades 21bc1, 21ac1 of the right upper and lower cutting parts 21b, 21a, and the entire electric wire 30 from the outer sheath 31 to the insulating sheaths 32a, 32b and the core wires 33a, 33b is cut at the positions of the core wire cutting blades 21bc2, 21ac2.

[0077] (4) The worker grasps the unprocessed portion of the electric wire 30 in front of the left upper and lower jaws 14bL, 14aL, and while firmly gripping the upper and lower handles 10a, 10b, pulls and moves the left and right upper and lower jaws 14bL, 14aL and 14bR, 14aR toward the processed (cut) tip of the electric wire 30, as shown by arrow P in Fig. 12. This cuts off the cut tip electric wire 30e from the unprocessed portion of the electric wire 30 in front, and simultaneously strips off the cut 30 mm (Ds+De) of the outer coating 31e and the cut 5 mm (De) of the insulating coatings 32ae, 32be, completing the processing (cutting) of the electric wire 30.

[0078] (Summary of the embodiment) According to the embodiment of the electric wire cutting stripper 10, the left upper and lower jaw portions 14bL, 14aL and the right upper and lower jaw portions 14bR, 14aR, which are both symmetrical in the vertical direction, are arranged parallel to the left and right via left intersection portions 13aL, 13bL and right intersection portions 13aR, 13bR, which are arranged parallel to the left and right and cross and invert the top and bottom, respectively, from the base portions 11a, 11b at the front ends of the upper and lower handle portions 10a, 10b, which are closed when gripped by the operator.

[0079] The upper surface of the left lower jaw 14aL and the lower surface of the left upper jaw 14bL of the left upper and lower jaws 14bL, 14aL, respectively, are provided with a left lower part attachment portion 18aL and an upper left part attachment portion 18bL, which are recessed in a U-shape when viewed from the side, and a left lower cutting part 20a having an outer coated lower cutting blade 20ac and an upper left cutting part 20b having an outer coated upper cutting blade 20bc are attached to the left side surface of each in a detachable and replaceable manner.

[0080] A U-shaped recessed right lower part mounting portion 18aR and an right upper part mounting portion 18bR are also provided on the upper surface of the right lower jaw portion 14aR and the lower surface of the right upper jaw portion 14bR of the right upper jaw portion 14bR, 14aR, respectively, with similar shapes and positions parallel to the part mounting portions 18aL, 18bL of the left upper and lower jaw portions 14bL, 14aL, and a right lower cutting part 21a having an insulating coating lower cutting blade 21ac1 on its left side and a core wire lower cutting blade 21ac2 on its right side, and an right upper cutting part 21b having an insulating coating upper cutting blade 21bc1 on its left side and a core wire upper cutting blade 21bc2 on its right side are attached in a detachable and replaceable manner.

[0081] When the electric wire 30, which is the object to be processed, is clamped between the left upper and lower jaw portions 14bL, 14aL equipped with the left upper and lower cutting parts 20b, 20a and the right upper and lower jaw portions 14bR, 14aR equipped with the right upper and lower cutting parts 21b, 21a, and the electric wire 30 is cut by gripping the upper and lower handle portions 10a, 10b, the outer coating 31 of the electric wire 30 is cut at the positions of the outer coating cutting blades 20bc, 20ac of the left upper and lower cutting parts 20b, 20a, and at the same time the outer coating 31 and the insulating coatings 32a, 32b are cut at the positions of the insulating coating cutting blades 21bc1, 21ac1 of the right upper and lower cutting parts 21b, 21a, and the entire electric wire 30 from the outer coating 31 to the core wire 33a, 33b is cut and separated at the positions of the core wire cutting blades 21bc2, 21ac2.

[0082] While gripping the upper and lower handles 10a, 10b while gripping the unprocessed portion of the electric wire 30, when the left and right upper and lower jaws 14bL, 14aL and 14bR, 14aR in which the electric wire 30 is sandwiched are pulled in the direction of the cut end of the electric wire 30, the outer sheath 31 of the electric wire 30 is pulled from the outer sheath cutting blades 20bc, 20ac of the upper and lower cutting parts 20b, 20a attached to the left upper and lower jaws 14bL, 14aL to the right upper and lower jaws 14b At the same time, the insulating coating 32a, 32b is stripped with an insulating coating stripping width Ds corresponding to the distance from the insulating coating cutting blade 21bc1, 21ac1 of the right upper and lower cutting parts 21b, 21a to the core wire cutting blade 21bc2, 21ac2.

[0083] Therefore, the electric wire cutting stripper 10 of the embodiment can easily perform the cutting operation and the stripping operation of the electric wire 30 having a plurality of core wires at the same time.

[0084] Furthermore, according to the embodiment of the electric wire cutting stripper 10, the left upper and lower cutting parts 20b, 20a and the right upper and lower cutting parts 21b, 21a are prepared in advance as cutting parts 20b, 20a and 21b, 21a corresponding to electric wires 30 having different numbers of cores (n cores), such as for two cores and three cores, and are used by switching them depending on the number of cores of the electric wire 30 to be processed. This makes it possible to simultaneously and easily perform the cutting operation and the stripping operation of the electric wire 30, even for electric wires 30 having different numbers of cores.

[0085] Furthermore, according to the embodiment of the electric wire cutting stripper 10, four screws 15 are passed through from the right upper and lower jaw portions 14bR, 14aR that attach the right upper and lower cutting parts 21b, 21a to the left upper and lower jaw portions 14bL, 14aL4 that attach the left upper and lower cutting parts 20b, 20a. The adjustment nuts 17a, 17b (exterior coating stripping width adjustment mechanism) are threaded onto both the left and right sides of the left upper and lower jaw portions 14bL, 14aL4 to adjust the distance between the right upper and lower jaw portions 14bR, 14aR and the left upper and lower jaw portions 14bL, 14aL4, thereby making it possible to easily adjust the stripping width (Ds+De) of the outer coating 31.

[0086] Therefore, even if the electric wires 30 have different numbers of core wires, it is possible to simultaneously and easily perform the cutting operation and the stripping operation of the electric wires 30 while arbitrarily adjusting the stripping width (Ds+De) of the outer coating 31.

[0087] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0088] 10...wire cutting stripper, 10a, 10b...upper and lower handles, 11a, 11b...base, M...scale, 11B...slide shaft, 12...cross shaft, 13aL, 13bL...left cross section, 13aR, 13bR...right cross section, 14bL, 14aL...left upper and lower jaws (first upper and lower jaws), 14bR, 14aR...right upper and lower jaws (second upper and lower jaws), 15h...screw head (fixed), 15...screw, 16...fixing nut, 17a, 17b...adjusting nut, 18bL, 18aL...left upper and lower part mounting section, 18bR, 18aR...right upper and lower part mounting section, 19...mounting groove, 20a...left lower cutting part (first lower cutting part), 20ac...lower cutting blade for outer sheath, 20b...upper left cutting part (first upper cutting part), 20bc...upper cutting blade for outer sheath, 21a...lower right cutting part (second lower cutting part), 21ac1...lower cutting blade for insulation sheath, 21ac2...lower cutting blade for core wire, 21b...upper right cutting part (second upper cutting part), 21bc1...upper cutting blade for insulation sheath, 21bc2...upper cutting blade for core wire, 22...wire guide, 23...mounting protrusion, 30...wire (multiple core wires), 31...outer sheath, 32a, 32b...insulating sheath, 33a, 33b...core wire, Ds...insulating sheath stripping width, Ds+De...outer sheath stripping width.

Claims

1. A wire cutting stripper for a wire having multiple core wires, a first upper and lower jaw portion that opens and closes in conjunction with the opening and closing of the pair of handle portions operated by a user; a second upper and lower jaw unit that opens and closes in a direction parallel to and at a position parallel to the first upper and lower jaw unit; upper and lower outer covering cutting blades that are provided on opposing surfaces of the first upper and lower jaws, respectively, and that cut the outer covering of the electric wire that is arranged between the first upper and lower jaws and the second upper and lower jaws in a direction perpendicular to the opening and closing direction, from above and below the electric wire as the first upper and lower jaws close, while leaving a core wire and an insulating covering of the electric wire; upper and lower insulating covering cutting blades provided on opposing surfaces of the second upper and lower jaw portions, respectively, for cutting the outer covering and the insulating covering of the electric wire disposed between the first upper and lower jaw portions and the second upper and lower jaw portions from above and below the electric wire while leaving a core wire of the electric wire as the second upper and lower jaw portions close; upper and lower core cutting blades are provided on opposing surfaces of the second upper and lower jaw portions at positions spaced apart by a certain distance from the upper and lower insulating coating cutting blades in a direction away from the first upper and lower jaw portions, respectively, and cut the electric wire arranged between the first upper and lower jaw portions and the second upper and lower jaw portions from above and below; A wire cutting stripper.

2. an outer covering stripping width adjustment mechanism that adjusts a parallel distance between the first upper and lower jaw portions and the second upper and lower jaw portions in response to a user operation, thereby adjusting a stripping width of the outer covering of the electric wire; 2. The wire cutting stripper according to claim 1.

3. a first upper cutting part detachably attached to the first upper jaw portion provided with an upper outer sheath cutting blade of the upper and lower outer sheath cutting blades; a first lower cutting part detachably attached to the first lower jaw portion provided with a lower outer sheath cutting blade of the upper and lower outer sheath cutting blades; a second upper cutting part detachably attached to the second upper jaw portion, which is provided with an upper insulating sheath cutting blade of the upper and lower insulating sheath cutting blades and an upper core wire cutting blade of the upper and lower core wire cutting blades; a second lower cutting part detachably attached to the second lower jaw portion provided with the lower insulating sheath cutting blade of the upper and lower insulating sheath cutting blades and the lower core wire cutting blade of the upper and lower core wire cutting blades, a plurality of the first upper cut part, the first lower cut part, the second upper cut part, and the second lower cut part are prepared corresponding to electric wires having different numbers of core wires; 3. The wire cutting stripper according to claim 1 or 2.

4. The first upper cutting part, the first lower cutting part, the second upper cutting part, and the second lower cutting part are attached by fitting grooves or protrusions provided on the first upper jaw part, the first lower jaw part, the second upper jaw part, and the second lower jaw part into protrusions or grooves provided on attachment surfaces of the first upper jaw part, the first lower jaw part, the second upper jaw part, and the second lower jaw part, respectively.

4. The wire cutting stripper according to claim 3.

5. The convex portion and the groove are attracted to each other as magnets.

5. The wire cutting stripper according to claim 4.

6. mounting surfaces of the first upper cutting part, the first lower cutting part, the second upper cutting part, and the second lower cutting part, respectively, to the first upper jaw part, the first lower jaw part, the second upper jaw part, and the second lower jaw part, and mounting surfaces of the first upper jaw part, the first lower jaw part, the second upper jaw part, and the second lower jaw part, respectively, to the first upper cutting part, the first lower cutting part, the second upper cutting part, and the second lower cutting part, are attracted by magnets.

5. The wire cutting stripper according to claim 4.

7. and an electric wire guide provided on each of the first upper cutting part, the first lower cutting part, the second upper cutting part, and the second lower cutting part, for guiding a side surface of the electric wire arranged from between the first upper and lower jaws to between the second upper and lower jaws in a direction perpendicular to the opening and closing direction when the first upper and lower jaws and the second upper and lower jaws are closed.

5. The wire cutting stripper according to claim 4.

8. a scale provided along a direction perpendicular to the opening and closing direction of the first upper and second upper jaw portions, for measuring a parallel distance between the first upper and second upper jaw portions, which is adjusted by the outer coating stripping width adjustment mechanism; 3. The wire cutting stripper according to claim 2.

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