JPS6116735Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool for stripping the insulation coating of an electric wire whose surface is coated with an insulating material such as rubber or vinyl chloride.

This type of insulation coating stripping tool has a pair of handles with jaws connected to each other on the tip side, and an X-shape near the base of the jaws.
It is generally said that they are overlapped in a letter shape and pivoted, and the cutting blades are attached to both jaws facing each other so that they can be opened and closed freely, and the electric wire that requires stripping of the insulation coating is inserted between the cutting blades. Grasp the handle and cut the insulation coating to a predetermined depth with the cutting blade, then pull and move the tool body in the axial direction of the wire to cut the insulation coating along the core of the wire with both cutting blades. Stripping is performed, but in this case, the tool body must be moved carefully to avoid damaging or cutting the core wires of the wires, which is extremely difficult to do in switchboxes or other narrow spaces. .
Therefore, as shown in Special Publication No. 55-26657,
An electric wire is held between the tip clamping parts of the opposing outer clamping parts, and the upper and lower blade parts at the tip of the movable inner stripping part provided opposite to the inner side of the outer clamping parts are used to cover the electric wire. A coating material stripping tool is also known in which the coating is cut and peeled by making an incision and then moving the inner stripping bit part backward within the outer tightening part to cut and peel the coating using upper and lower blade parts that move together. However, in this type of wire, the wire is only caught between the tip holding parts of the outer clamping part and is temporarily fixed, so the inner peeling part is moved backward by the peeling action. When removing the coating, there is a risk that the wire may slip out from between the tip holding parts of the clamped outer clamping part, making it impossible to always perform reliable peeling. Since the inner stripping part is on the axis of the handle, if the upper and lower outer tightening parts are not long enough, the amount of movement of the inner parting part will be reduced, resulting in a large product. Since the insulating coating must be cut and peeled one by one, there are disadvantages such as a time-consuming work.

The present invention was completed with the aim of providing a tool for stripping the insulation coating of electric wires without the above-mentioned drawbacks, and the illustrated embodiments will be described in detail below.

Reference numeral 1 designates one handle with a mandible 2 connected to its tip, and a lower holding part 3 provided on the mandible 2 protrudes from the surface of the mandible 2 as shown in FIG. The upper surface 3' of the holding part 3 is provided to extend outward from one side 9' of the handle of the holding part 3, and the upper surface 3' of the holding part 3 is provided with one lower blade 4 and a plurality of guides 5 that cut into the insulation coating of the wire during the stripping operation. The base is fixedly held and attached to the groove 6 formed in the holding part 3, and therefore the lower blade 4 and the guide 5 are also attached to the handles 1, 9.
The lower blade 4 has a wave-shaped blade part 8 formed of a plurality of consecutive arcuate parts, and a guide 5
are attached so as to be located at both ends of the wave-shaped blade portion 8. Further, at the base of the lower jaw 2 of the handle 1, the tip of a lower handle 9 having a U-shaped cross section and one side 9' on the front side is pivotally supported by a shaft 10. A spring 13 for returning the handle 9 is provided which is in contact with a stepped portion 11 formed inside and whose other end is in contact with the inner wall surface of the handle 9.
Reference numeral 14 denotes a guide hole formed in a substantially middle portion of the upper handle 1 so as to pass through the handle 1 in a substantially longitudinal direction. The guide member 15 is pivotally supported on the handle 1 with a bolt 16 fixed to the handle 1, and the guide member 15 is projected at the tip in the same direction as the holding part 3 below the handle 1, and extends along the axis of the handles 1 and 9, that is, on one side. An upper holding part 17 located outward from 1' and 9' is arranged in series, and a lower surface 17' of the holding part 17 faces the upper surface 3' of the lower holding part 3, and the handle 1, It constitutes an electric wire holding mechanism that holds the electric wire when the opening degree of the upper blade 9 is made small and also regulates the cutting amount of the upper blade 30 (described later). Furthermore, a recess 19 is formed in the lower surface 17' of the holding part 17 to accommodate the tip of each guide 5 during the insulation coating stripping operation,
Furthermore, an elongated hole 20 is transparently provided at the rear of the guide member 15. Reference numeral 21 denotes a connecting rod whose lower end is pivotally supported on a shaft 22 provided at the front end of the lower handle 9, and whose tip is pivotally supported on a bottle 23 whose tip is loosely inserted into the elongated hole 20. It is configured to be pivotally connected to the handle 9 by a rod 21, and the other end of a spring 24 provided on the shaft 22' and having one end in contact with the inner wall surface of the handle 9 is brought into contact with the connecting rod 21. A counterclockwise elastic force is applied around the shaft 22, and when the grips 1 and 9 are released, the handle 9 is pivoted clockwise and lowered together with the spring 13, and the connecting rod is 21 in the counterclockwise direction, and its tip is inserted into the elongated hole 20 as shown in FIG.
26 is an upper blade holding member having a fixed part 27 of an upper blade 30 (described later) that cuts into the insulation coating of the wire during the stripping operation, and is parallel to the guide member 15. This upper blade holding member 26 has an elongated hole 28 formed therethrough approximately in the middle thereof, into which the bolt 16 is loosely inserted, and a hole 29 formed therethrough at the rear portion thereof. The pin 23 is inserted loosely, and therefore the upper blade holding member 26 is also pivotally supported on the handle 1, and the rear part is pivotally connected to the handle 9 by the connecting rod 21, and the fixing part 27 is located on the rear side of the holding part 17 and protrudes in the same direction as the holding part 17, and is located outward from one side 1', 9' of the handles 1, 9, and the tip surface of the fixing part 27 is Attached to 27' is the other upper blade 30 that faces the lower blade 4 and cuts into the insulation coating of the wire during the stripping operation. 1' and 9', the upper blade 30 is formed with a wave-shaped blade part 32 having a plurality of consecutive arcuate parts so as to form a pair with the lower blade 4. Reference numeral 33 denotes a peeling member that comes into contact with the insulation coating on the side cut by the lower blade 4 and moves in parallel with the upper blade 30 to assist in peeling off the insulation coating, and a peeling part 34 is connected to the tip thereof. At the same time, a long hole 35 is transparently provided in the rear part and is interposed between the guide member 15 in the guide hole 14 and the upper blade holding member 26,
Further, this peeling member 33 has a long hole 36 provided therethrough at approximately the middle portion thereof, into which the bolt 16 is loosely inserted, and is pivotally supported by the handle 1 similarly to the upper blade holding member 26, and is also provided in the long hole 35. The pin 23 is inserted loosely and the rear part is pivotally connected to the front part of the handle 9 by the connecting rod 21, and the peeling part 34 is connected to the seventh part.
As shown in the figure, it protrudes in the same direction as the holding part 3 and is positioned outward from one side 1', 9' of the handles 1, 9, and is also located on the rear side of the lower blade 4, and at the start of the peeling operation, the peeling part The tip of the blade 34 is in contact with the rear part of the lower blade 4, and if necessary, a peeling blade 37 is attached to the outside of one side 1', 9' of the handles 1, 9 in the same way as the lower blade 4. located and installed.

As shown in FIG. 1, the handle 9 is in an open state, and an electric wire whose insulation coating needs to be peeled off, such as a flat coated electric wire, is guided by the guide 5 with its axial direction being the longitudinal direction of the handle 1. , 5 from the front side, or from the side between the guides 5 and 5, and the tip of the upper handle 1 is provided with a position where stripping of the insulation coating is to be started. When the handles 1 and 9 are grasped after being positioned on the wave-shaped blade part 8 of the lower blade 4 fixedly attached to the upper surface 3', the lower handle 9 resists the elastic force of the spring 13 and rotates around the shaft 10. As a result, the connecting rod 21 pivoted to the shaft 22 of the handle 9 also moves upward under the action of the counterclockwise elastic force of the spring 24, and the pin 23 at its tip moves upward. The rear part of the guide member 15 is pushed up, and accordingly, the guide member 15 pivots counterclockwise around the bolt 16, and the upper holding part 17 descends toward the holding part 3 side below the handle 1. becomes. Further, due to the movement of the connecting rod 21, the rear part of the upper blade holding member 26 is simultaneously pushed up by the pin 23, and the bolt 16
The fixed part 27 at the tip pivots counterclockwise around
The upper blade 30 with the wave-shaped blade part 32 attached to the lower jaw 2 descends toward the lower blade 4 with the wave-shaped blade part 8 attached to the upper surface 3' of the lower jaw 2, but the peeling member 33 is inserted into the elongated hole 35 at the rear thereof. The pin 23 due to the movement of the connecting rod 21
The pin 23 moved by the connecting rod 21 escapes along the elongated hole 35, and the peeling member 33 remains as it is without pivoting, and the peeling part 34 moves in the lower direction. A peeling blade 37 is held in contact with the holding part 3 and adjacent to the lower blade 4. As the handle 9 pivots upward in this manner, the upper blade 3
0 is crimped from above to the flat covered wire placed on the lower blade 4, the tip of each guide 5 enters the recess 19, and the wavy blade portions 8, 32 of the lower blade 4 and the upper blade 30 are attached to the flat covered wire. A peeling blade 3 cuts into the cylindrical insulation coating and is located adjacent to the lower part of the lower blade 4 at the same time.
7 also cuts into the coating, and the upper surface 3' of the holder 3 and the lower surface 1 of the holder 17 of the wire holding mechanism which holds the wire and regulates the cutting amount of the upper blade 30.
When the upper and lower surfaces of the flat coated wire come into contact with 7', the pivoting of the guide member 15 and the upper blade holding member 26 is stopped, and the wire is securely held by the wire holding mechanism. Become. At this time, as shown in FIG. 5, the lower blade 4 and the upper blade 30 cut only the insulation coating of the flat covered electric wire with the waveform blade parts 8, 32, and the solid wire is cut by the waveform blade parts 8, 32. It is located between the continuously formed arcuate portions and will not be damaged.
In this state, the long hole 20 of the guide member 15, the long hole 28 of the upper blade holding member 26, and the long hole 36 of the peeling member 33 are
are all parallel to the longitudinal side of the handle 1. Subsequently, when the handle 9 is further pivoted upward, the lower end of the connecting rod 21 is similarly raised by the shaft 22 of the handle 9, but the tip of the connecting rod 21 is connected to the guide member 15 which is in the stopped state via the pin 23. Since the pin 23 is engaged with the elongated hole 20, the pin 23 moves to the right along the elongated hole 20 as the lower end of the connecting rod 21 rises. As a result of this movement of the pin 23, the upper blade holding member 26 whose rear portion is pivotally supported by the pin 23 is loosely inserted into the elongated hole 28 in the intermediate portion. The peeling member 33, whose pin 23 is loosely inserted into the elongated hole 35, moves to the right under the guidance of the bolt 16, and at the same time, the peeling member 33, whose pin 23 is loosely inserted into the elongated hole 35, also moves the bolt 1, whose pin 23 is loosely inserted into the elongated hole 36 in the middle part.
6, the upper blade holding member 26 moves parallel to the right side, and as a result of this movement, the upper blade 30 and the peeling blade 37 that cut into the insulation coating are also moved to the right side, that is, on the longitudinal side of the handle 1. The flat covered wires simultaneously move parallel to each other to the right along the axis line, resulting in the state shown in Fig. 3. However, when the opening degree of the handles 1 and 9 is reduced, the flat covered wires grip the wires and move upward. Since the upper blade 30 and the peeling are prevented from moving by the lower blade 4 and the holding parts 3 and 17, which serve as wire holding mechanisms that regulate the amount of cut of the blade 30, the upper blade 30 cuts the insulation coating of the wire and pulls it out proximally. The movement of the blade 37 causes the insulation coating to be peeled off from each cut. As described above, the present invention attaches the fixed lower blade 4 to the upper surface 3' of the lower jaw 2, and uses the waveform blade part 8 of the lower blade 4 and the waveform blade part 32 of the upper blade 30 to remove the insulation coating of the flat covered wire during the peeling operation. Since the cut end is locked by the fixed lower blade 4, the tensile force caused by the peeling operation is reduced when the electric wire is simply held between the top and bottom end holding parts of the outer clamping parts facing each other. There is no risk that the wire will slip out and the insulation coating will not be reliably peeled off from a predetermined location, and together with the wire holding mechanism, the wire can be completely prevented from sliding out during the stripping operation. Moreover, the movement of the upper blade 30 ensures the removal of the coating, and furthermore, the wire holding mechanism, the upper blade 30, and the lower blade 4 are all located outside of one side of the handles 1 and 9. Since it is extended, the upper blade 30 can move a sufficient amount even if the lower jaw 2 is shortened, so that not only the overall size can be reduced, but also the middle part of the electric wire can be peeled off. Next, when the handles 1 and 9 are released, the reverse operation described above is performed, and the handle 9 first releases the spring 1.
3 and 24 in the clockwise direction, and the connecting rod 21 is also pivoted counterclockwise and returned by the spring 24, whereby the upper blade holding member 26, the upper blade 30, the peeling member 33, and the peeling blade 37 simultaneously moves parallel to the left to return to the state shown in FIG. The device pivots to return to the state shown in FIG. 1, and the stripped flat covered wire is released, completing the stripping operation. In addition, when stripping the insulation coating of a single wire, the position at which to start stripping the insulation coating of a plurality of single wires is positioned on each arcuate part of the corrugated blade part 8 formed on the lower blade 4, and the handle 1 , 9, the upper blade 30 with the wave-shaped blade part 32 attached to the fixed part 27 descends toward the lower blade 4 with the wave-shaped blade part 8 attached to the upper surface 3' of the lower jaw 2. At the same time, the lower blade 4 cuts into the insulation coating of the plurality of single wires located on the wavy blade part 8 of the lower blade 4.
The stripping blade 37 located adjacent to the lower part of the wire also cuts into the insulation coating, and holds the wire with the upper surface 3' of the holding part 3 of the wire holding mechanism that grips the wire and regulates the cutting amount of the upper blade 30. When the upper and lower surfaces of the single wire sheath come into contact with the lower surface 17' of the portion 17, the pivoting of the guide member 15 and the upper blade holding member 26 is stopped. At this time, the lower blade 4 and the upper blade 30 are in a state where only the insulation coating of the single wire is cut as shown in FIG. 6, and the core wire is not damaged because the corrugated blade portions 8 and 32 do not come into contact with the core wire. Subsequently, by further pivoting the handle 9 upward, the peeling member 33 and the upper blade holding member 26 move in parallel to the right in the same manner as described above, so that the insulation coating is cut and pulled out toward the base. The upper blade 30 and the stripping blade 37 also move along the core wire, and the insulation coatings of the plurality of single wires are simultaneously stripped from the cut ends thereof.

As is clear from the above explanation, according to the present invention, the electric wire whose insulation coating is to be stripped is simply positioned on the upper surface of the holding part of the lower jaw that extends outward from one side of the handle, and the handle is grasped. The insulation coating can be easily stripped along the axial direction of a flat covered wire, and the insulation coating of multiple single wires can also be stripped in the same way. It is possible to perform stripping work, and the same upper and lower blades are used to strip the insulation coatings of flat insulated wires and single wires, and two types of blades are not required. It is easy to process, and the upper and lower blades as well as the jaw length can be made smaller, making it cheaper. As a result, the tool itself is also smaller and lighter, making it easier to handle. It has the following advantages and has extremely great practical value.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway front view, Fig. 2 is a partially cutaway front view showing the upper blade in a lowered state, and Fig. 3 is a partially cutaway front view of the upper blade and the peeling blade. Fig. 4 is a partially cutaway front view showing the upper blade in a state where it has been moved, Fig. 5 is a partially cutaway side view showing the upper blade in a further lowered state, Fig. FIG. 7 is a partially cutaway side view showing different parts, and FIG. 7 is a partially cutaway perspective view of the main part. 1... One handle, 2... Lower jaw, 4... Lower blade,
8... Waveform blade portion, 9... Other handle, 30... Upper blade, 32... Waveform blade portion.

Claims (1)

[Scope of utility model registration request] A wire holding mechanism is provided at the front end of the tool body, in which the lower jaw 2 is provided at the tip, and the other handle 9 is pivotally attached to the middle part of one handle 1, which holds the wire when the opening degree of both handles 1 and 9 is reduced. In the electric wire insulation coating stripping tool that is provided with a cutting blade that cuts the insulation coating of the electric wire and pulls it out proximally, the electric wire holding mechanism and the cutting blade are protruded outward from one side of the handles 1 and 9. The lower blade 4 is fixed and has a cutting blade attached to the upper surface of the lower jaw 2, and the upper blade 30 is movable as the other handle 9 pivots, and the upper blade 30 has a plurality of arcuate parts. A tool for stripping the insulation coating of an electric wire, characterized in that a continuous wave-shaped blade part 32 is formed, and a wave-shaped blade part 8 forming a pair with the wave-shaped blade part 32 is formed on the lower blade 4.