JPS6026482Y2 - Tool for stripping the insulation coating of electric wires - 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, which are overlapped and pivoted in an X-shape near the base of the jaws, and cutting blades are opposed to the jaws of both jaws. It is generally said to be attached and can be opened and closed freely, and the electric wire whose insulation sheathing needs to be stripped is inserted between the two cutting blades, the handles are tightened, and the cutting blade is made to cut into the insulation sheath to a predetermined depth. Later, by pulling and moving the tool body in the axial direction of the wire, the insulation coating is stripped along the core wire of the wire using both cutting blades. Since the tool body must be moved carefully to avoid damage, it is extremely difficult to work inside a switch box or other narrow place.

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 denotes 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. A lower blade 4 and a plurality of guides 5 are provided on the upper surface 3' of the holding part 3 to cut into the insulation coating of the wire during the stripping operation. The base of the blade 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 located outside of the axis of the handle 1°9, that is, one side 1', 9'. .

Further, one side of the lower blade 4 has one or more arc-shaped blade portions 7 for cutting the insulation coating of a single wire, and the other side is used for cutting the insulation coating of a flat insulated electric wire such as a flat vinyl sheath cable. The blade part 8 has a recessed groove part in the center part, and the guide 5 has such a blade part 7,
It is attached to both ends and the border of 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 approximately in the middle of the upper handle 1 so as to penetrate in the approximately longitudinal direction of the handle 1. A guide member 15 is inserted into the guide hole 14 and the guide member 15 is approximately The intermediate part is pivotally supported on the handle 1 by a bolt 16 fixed to the handle 1, and this guide member 15 is protruded at the tip in the same direction as the lower holding part 3 of the handle 1, and is aligned with the axis of the handle 1°9. That is, an upper holding part 17 positioned outward from one side 1', 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, A stop member 1 constituting a wire holding mechanism that holds the wire when the opening degree of 9 is made small, and slightly protruding from the lower surface 17' on one side.
8 is provided, and the stop member 18 grasps the handles 1 and 9 and moves the guide member 15 through a connecting rod 21 (to be described later) to a bolt 16.
This defines the pivot position when the guide member 15 is pivoted counterclockwise around The pivot movement is stopped when the pivot movement is stopped.

Furthermore, a recess 1 is provided on the lower surface 17' of the holding portion 17 to accommodate the tip of each guide 5 during the insulation coating stripping operation.
9 are correspondingly formed, and 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 pin 23 loosely inserted into the elongated hole 20, whereby the guide member 15 is connected. 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. can be,
A counterclockwise resilient force is applied around the shaft 22, and when the grips 1 and 9 are released, the spring 13
At the same time, the handle 9 is pivoted clockwise and lowered, and the connecting rod 21 is pivoted counterclockwise to return its tip to the left side of the elongated hole 20 as shown in FIG.
Reference numeral 26 denotes an upper blade holding member having a fixed part 27 of an upper blade 30 (described later) which is connected to the tip to cut into the insulation coating of the electric wire during the stripping operation, and is inserted into the guide hole 14 in parallel with the guide member 15. The upper blade holding member 26 has an elongated hole 28 formed therethrough approximately in the middle, into which the bolt 16 is loosely inserted, and a hole 29 formed through the rear part, into which the pin 23 is loosely inserted. The blade holding member 26 is also pivotally supported by the handle 1, and its rear part is pivotally connected to the handle 9 by a connecting rod 21, and the fixing part 27 is located on the rear side of the holding part 17. At the same time, one side 1' of the handles 1 and 9 protrudes in the same direction as the holding portion 17.

9', and the other upper blade 30 is attached to the distal end surface 27' of the fixing part 27, facing the lower blade 4 and cutting into the insulation coating of the electric wire during the stripping operation. Like the lower blade 4, it is positioned outward from the axes of the handles 1, 9, that is, one side 1', 9'. At the same time, the other side is a blade part 32 having a groove-shaped part in the center corresponding to the blade part 8.

Reference numeral 33 denotes a movable peeling member that assists in peeling off the insulation coating by biting into the insulation coating on the side cut by the lower blade 4 and moving in parallel with the upper blade 30; A peeling part 34 is continuously provided in the holder, and a long hole 35 is formed in the rear part thereof, and the peeling part 33 is inserted between the guide member 15 in the guide hole 14 and the upper blade holding member 26, and this peeling member 33 is approximately A long hole 36 is transparently provided in the middle part, into which a bolt 16 is loosely inserted, and is pivotally supported on the handle 1 similarly to the upper blade holding member 26, and a pin 23 is inserted into the long hole 35.
is loosely inserted 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
As shown in FIG. 5, is protruded in the same direction as the holding part 3, is positioned outward from one side 1', 9' of the handles 1, 9, and is positioned on the rear side of the lower blade 4, and starts the peeling operation. Sometimes, the tip of the peeling part 34 is in contact with the rear part of the lower blade 4, and in such a peeling part 34, the peeling blade part 37 is attached to the outside of one side 1', 9' of the handles 1, 9 like the lower blade 4. The cutting surface of the stripping blade 37 is positioned in the same direction as the lower blade 4 and has a shape corresponding to that of the blade 7.8, so that it can bite into the insulation coating of the electric wire.

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 re-guides 5 and 5 to set the position at which the stripping of the insulation coating should be started at the tip of the upper handle 1. When the handles 1 and 9 are grasped after being positioned on the blade part 8 of the lower blade 4 fixedly attached to the upper surface 3',
The lower handle 9 pivots upward in the counterclockwise direction about the shaft 10 against the elastic force of the spring 13, and as a result, the connecting rod 21, which is pivotally supported on the shaft 22 of the handle 9, also responds to the reaction by the spring 24. The pin 2 at its tip moves upward under the action of a clockwise elastic force.
3 pushes up the rear part of the guide member 15, 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 to cover it. The electric wire is held by the upper and lower holding parts 3 and 17.

Furthermore, 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 upper blade of the upper blade fixing part 27 of the upper blade at the tip is pivoted counterclockwise around the bolt 16. 30 descends toward the lower blade 4 of the lower holding part 3, while the elongated hole 35 at the rear of the peeling member 33 is arranged in the same direction as the movement direction of 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 contacts the lower holding part 3 and the peeling blade part is in contact with the lower holding part 3. It is held adjacent to the lower blade 4.

As the handle 9 pivots upward in this manner, the upper blade 30 moves towards the lower blade 4.
The tip of each guide 5 enters the recess 19 by being crimped from above to the flat covered wire placed above, and the lower blade 4 and the upper blade 3
0 cut into the cylindrical insulation coating of the flat insulated wire, and at the same time, the stripping blade 37 located adjacent to the lower part of the lower blade 4 also bites into the coating. When the predetermined depth is reached, as shown in FIG.
The pivoting of the guide member 15 and the upper blade holding member 26 is stopped upon contact with the upper surface 3', and the wire is securely held by the wire holding mechanism, and in this state, the guide member 15 and the upper blade holding member 26 are stopped. The long hole 20 of the member 15, the long hole 28 of the upper blade holding member 26, and the long hole 36 of the peeling member 33 are all parallel to the longitudinal direction of the handle 1.

Subsequently, when the handle 9 is further pivoted upward, the shaft 2 of the handle 9
2, the lower end of the connecting rod 21 is also raised in the same way, but the connecting rod 2
1 is engaged with the elongated hole 20 of the guide member 15 in the stopped state via the pin 23, so that the pin 23 moves rightward along the elongated hole 20 as the lower end of the connecting rod 21 rises. Therefore, the connecting rod 21 moves around the shaft 22 and the spring 24
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. At the same time, the peeling member 33, whose pin 23 is loosely inserted into the elongated hole 35, is also moved to the right side under the guidance of the bolt 16 inserted in the intermediate portion, and the upper blade is held by the guide of the bolt 16, which is loosely inserted into the elongated hole 36 in the intermediate portion. The upper blade 30 and the peeling member 33 are moved to the right in parallel with the member 26, and as a result of such movement, the upper blade 30 and the peeling member 33 are cut into the insulation coating.
The stripping blades 37 also move to the right side, that is, along the axis of the flat covered wire, which is the longitudinal side of the handle 1, in parallel to each other at the same time, resulting in the state shown in FIG. When the opening degree of the handles 1 and 9 is reduced, movement is prevented by the lower blade 4 and the holding parts 3 and 17, which act as wire holding mechanisms that grip the wire, so that the cut insulation coating of the wire is The upper blade 30 is brought into contact with the cutting edge and pulled out to the base, and the upper blade 3 is held in a state where the peeling blade part 37 is bitten into the lower surface of the insulation coating.
They are each peeled off from the cut ends by a peeling member 33 that moves toward the base along with the cut.

In this way, the present invention has a lower blade 4 fixed to the upper surface 3' of the lower jaw 2.
is attached so that the blade part 8 of the lower blade 4 and the blade part 32 of the upper blade 30 cut into the insulation coating of the wire during the stripping operation, so that the wire is simply held between the upper and lower opposing jaws. In this case, there is no risk that the electrical wire will slip out from between the clamping jaws due to the tensile force caused by the stripping operation, and the insulation coating will not be reliably stripped from the predetermined location, and slipping of the wire during the stripping operation can be completely prevented. However, if the stripping member 33 that cuts the stripping blade portion 37 into the insulation coating of the wire during the stripping operation is not provided, the wire will be pushed down from the upper blade holding member 26 side during the stripping operation and the wire will be removed. There is a risk that the core wire may hit the lower blade 4 and damage it, or the upper blade 30 may slip on the outer surface of the insulation coating of the wire and be unable to peel it off.
By providing the stripping member 33, deformation of the wire during stripping operation is prevented, the core wire of the wire is not damaged, and the stripping portion 37 bites into the lower surface of the coating of the wire and works together with the upper blade 30. This ensures reliable removal of the coating.

Next, when the grips of the handles 1 and 9 are released, the above-mentioned reverse operation is performed, and the handle 9 is first pivoted downward clockwise by the springs 13 and 24, and the connecting rod 21 is also pivoted counterclockwise by the spring 24. As a result, the upper blade holding member 26, the upper blade 30, the peeling member 33, and the peeling blade portion 37 simultaneously move to the left in parallel and return to the state shown in FIG. is pivoted downward, the connecting rod 21 is lowered, the guide member 15 and the upper blade holding member 26 are pivoted clockwise to return to the state shown in FIG. 1, and the stripped flat covered wire is released. The peeling work is then completed.

In addition, when stripping the insulation coating of a single wire, position the single wire on the arc-shaped blade portion 7 of the lower blade 4 in the same manner as described above, and then use the handles 1 and 9.
By grasping the blade, the blade portion 7, the blade portion 31 of the upper blade 30, and the stripping blade portion 37 bite into the insulation coating of the single wire and move along the core wire of the single wire, so that the insulation coating is peeled off. It will be done.

As is clear from the above explanation, according to the present invention,
Simply place the wire whose insulation coating is to be removed on the holding part of the lower jaw and grasp the handle, and the wire holding mechanism allows you to move the wire along the axial direction without worrying about it slipping out due to tensile force. Since the insulation coating is stripped, it is extremely efficient and allows the insulation coating to be stripped in narrow spaces.In addition, only the upper blade moves in the axial direction of the tool body compared to the fixed lower blade. Since the insulation coating of the wire is pulled out to the base after cutting, there is no risk of the cutting position shifting, and the mechanism is simple. Furthermore, the cut insulation coating has a peeling blade on the underside. The insulation coating is peeled off with the upper blade with the help of the peeling member which is bitten into the upper blade and moved to the base together with the upper blade, so the cut insulation coating can be easily pulled out. In addition, it has extremely practical value as a tool that eliminates the drawbacks of conventional tools for stripping the insulation coating of electric wires.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway front view with the upper blade lowered, and FIG. The figure is a partially cutaway front view showing a state in which the upper blade and the peeling blade are moved, FIG. 4 is a side view, and FIG. 5 is a partially cutaway perspective view of the main part. 1: Handle, 2: Lower jaw, 3: Lower holding part, 3': Upper surface,
4: Lower blade, 9: Handle, 10: Shaft, 15: Guide member, 17
: Upper holding part, 30: Upper blade, 33: Peeling member, 37:
Peeling blade part.

Claims (1)

[Scope of utility model registration request] Both handles 1 and 9 are opened at the front part of the tool body, which has a lower jaw 2 with a fixed lower blade 4 attached to the upper surface 3' at the tip. A wire holding mechanism that holds the wire when the power is reduced, a movable upper blade 30 that cuts the insulation coating of the wire and pulls it out to the base, and an upper blade 30 that bites into the lower surface of the cut insulation coating. A tool for stripping the insulation coating of electric wires, characterized in that a movable stripping member 33 is provided at the base thereof.