JPS5852808Y2 - wire stripper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire stripper used to expose the core wire by cutting and stripping the sheath of the wire.

Conventionally, this type of wire strip...
There is one shown in the figure.

Reference numerals 1 and 1' designate a handle pivotably attached to the tip base frame 2.2' so as to be expandable.

To attach the handles 1, 1' to the tip base frames 2, 2', horizontal mounting rods 1a, 1' are formed at the upper end of the handle 1.1'.
a to each storage gap 2a of the opposing tip base frames 2, 2'.
.

2'a and using the shaft 3.1. By interposing a spring 4 between both handles 1 and 1', the handles are pivoted so as to be expandable.

2 b t 2'b is an abutting standing wall provided near the tip of the tip base frame 2 2' at right angles to the longitudinal direction, and one side of the abutting standing wall 2 b, 2'b is open. wire.

Insertion holes 2 c * 2'c are provided respectively, and the electric wire insertion holes 2cv are provided on the outside of the abutment standing wall 2bt2'b.
Guide holding plates 5, 5', which are provided with wire insertion holes 5at5'a corresponding to 2'c, are removably fixed.

Reference numeral 6 denotes a movable wire holding member inserted between the abutting wall 2b and the holding plate 5 so as to be able to advance and retreat with respect to the fixed wire holding portion 2d described later, and this movable wire holding member 6 is inserted above the wire insertion hole 2c. Bending and shaping the abbreviated holding part 6a that can be engaged with the edge,
Moreover, a knurled groove for biting into the covering part 7a of the electric wire 7 is formed on the lower surface of the emblem holding part 6a.

2d is a jet ridge 2d1 arranged in a row on the lower edge of the wire insertion hole 2c.
It is a fixed electric wire holding part having.

On the other hand, reference numeral 8 denotes a movable blade slidably inserted between the abutting standing wall 2'b and the holding plate 5'. It is possible to move forward and backward relative to the fixed blade 9 which is replaceably fixed between the two.

Incidentally, at the corresponding positions of the fixed blade 9 and the movable blade 8, covering part cutting holes 8a and 9a are formed with a depth that does not reach the conductor part 7b of the electric wire 7.

As a sliding mechanism for sliding the movable wire holding member 6 and the movable blade 8, both ends of the link 10, 10' are connected to the pin 11a.
using t11b; 11'at11'b, the lower plate part 6b of the movable electric wire holding member 6 and the lower plate part 8b of the movable blade 8, respectively;
This is achieved by pivoting the handles 1, 1' near the shoulders 1b, 1'b.

Reference numeral 12 denotes a quick-action locking mechanism provided above the shaft 3 to prevent the distal end base frames 2, 2' from closing when opened;
Connect the outer ends of the two links 13 and 13' to the pins 14 and 14.
The inner ends of the links 13 and 13' are connected to the tip base frame 2 and 2' respectively at the tip base frames 2 and 2'.
2' is pivotally connected by a pin 15 so as to form a substantially V-shape in the closed state.

Moreover, by pressing the bent end 16a1 of the spring leg 16a of the coil spring 16 attached to the pin 11'b slidably against the lower surface of the link 13, the spring is always biased upward. .

13'a is an extended end of the link 13' which can abut against the shoulder 1'b of the handle 1'.

Next, the coating cutting operation of cutting and stripping the coating of the electric wire using this conventional wire stripper is shown in Figures 2 to 7.
The process will be explained in order according to the drawings.

First, the electric wire 7 is inserted into the electric wire insertion hole 5at2 as shown in FIG.
Insert into ct2'ct5'a.

At this time, the electric wire I is inserted while aligning the axes of the movable blade 8, the fixed blade 9, and the respective sheath cutting holes 8a and 9a with the axis of the electric wire 7.

When both handles 1, 1' are grasped at the same time, only one handle 1 closes inward against the elastic force of the spring 4 about the shaft 3, as shown in FIG.

This is because the bent end 16a1 of the coiled spring 16 attached to the shaft 11'b of the other handle 1' is pressed against the lower edge of the link 13, so the handle 1' has a lower winding than the other handle 1. Spring 1
This is because it has to close against the extra spring force of 6.

When the handle 1 closes inward around the shaft 3, the movable wire holding member 6 is pulled through the link 10.

Therefore, the movable wire holding member 6 slides between the abutting standing wall 2b and the guide holding plate 5 and descends, so that the holding part 6
The electric wire 7 is held between the fixed electric wire holding portion 2d located below the electric wire insertion hole 2c.

Then, as shown in FIG. 4, the other handle 1' pivots inward about the shaft 3 against the elastic force of the spring 4 and the spring foot 16a of the coiled spring 16, and closes. In order to pull the link 10', the movable blade 8 inserted between the abutting wall 2'b and the holding plate 5' is lowered relative to the fixed blade 9.

In this way, when the electric wire 7 is pressed, the conductor portion 7b escapes into the sheathing cutting holes 8a and 9a of the movable blade 8 and the fixed blade 9, so that only the sheathing portion 7a is cut by the movable blade 8 and the fixed blade 9.

Then, as shown in FIG. 5, when the handles 1 and 1' are further pivoted around the shaft 3 against the elastic force of the spring 4, the handles are closed.
The holding part 6a of the movable wire holding member 6 holds down the upper surface of the electric wire 7, and since the movable blade 8 abuts against the fixed blade 9, the lower plate part 6b of the movable wire holding member 6 holds the upper end The tip base frame 2 is pulled by the link 10 which is pivotally connected to the
On the other hand, as the tip base frame 2' is pulled by a link 10' whose upper end is pivotally connected to the lower end 8b of the movable blade 8, both tip base frames 2, 2' are moved outwardly about the shaft 3. Pivot to open.

Therefore, the covering portion 7a of the electric wire 7 cut by the movable blade 8 and the fixed blade 9 in the above operation is pulled to the outside of the movable blade 8 and the fixed blade 9, and is stripped off from the conductor portion 7a.

At this time, as the tip base frames 2, 2' open outward, they are pivoted to the tip base frames 2, 2' with pins 14 and 14', and their lower ends are crossed and overlapped with pins 15. The links 13 and 13', which are pivotally attached to each other, are pulled outward by the tip base frame 2 or 2', respectively, and pivoted to become straight.

In this state, the link 13 is pushed up by the spring leg 16a of the coil spring 16 whose bent end 16a1 slides on the lower edge of the link 13, so both links 13 and 13' are connected to the pin 14.
, 14' pivot upward from the state shown in FIG. 4 as shown in FIG. 5, thereby temporarily preventing both end base frames 2° 2' from closing.

After peeling off the covering part 7a from the conductor part 7b, the handle 1
, 1', as shown in FIG. 1 b, 1'b,
The axis 1 l b , 11'b rises and the link 10 ,
10', the movable wire holding member 6 and the movable blade 8 rise accordingly, and the wire insertion hole 5at2ct is pushed up.
The electric wire 7 can be removed from 2'C55'a.

In this conventional product, when the handles 1, 1' are further closed around the shaft 3 by the elastic force of the spring 4, the shoulder 1'b of the handle 1' is attached to the extending end 13'a of the link 13'. When the link 13' contacts and is lifted, the inner end of the link 13' pivots around the pin 14' by lever action and moves downward in the old direction, while the bent end 16a1 slides on the lower side of the link 13. When the winding spring 16 passes the dead center, its elastic force causes the link 13 to
By rapidly pushing up the outer end side of both links 13
, 13' pivot rapidly around the pins 14, 14' from the state shown in phantom lines in FIG. 7 in the bright direction as shown in solid lines.

Accordingly, the end base frames 2, 2', which had been opened outward by the links 13, 13', are rapidly pivoted about the shaft 3 by the elastic force of the spring 4, and are closed as shown in FIG.

However, in this conventional product, as both links 13, 13' of the locking mechanism 12 of the distal base frames 2, 2' rapidly pivot to the old position, the distal bases 2, 2' are rotated due to the reaction. Link 10 is swung in the direction of arrow A around axis 3.
' The movable blade 8 is pulled down instantaneously and collides with the fixed blade 9, and then returns to its original position.

Therefore, if the wire 11 is held in a state in which the sheathing portion 7a is removed, the conductor portion 7b of the electric wire 7 after the sheathing portion 7a is cut may be cut or damaged.

The present invention was developed in view of the above points, and its purpose is to prevent the movable blade from falling relative to the fixed blade due to swinging when the base frames at both ends are closed after the coating is peeled off. In addition, by gripping the handles of the pair, one tip base frame can be secured before the movable blade collides with the fixed blade. To provide a wire stripper that is prevented from spreading toward the other tip base frame.

The present invention will be explained below with reference to an embodiment shown in FIGS. 8 to 10.

In this embodiment, the same parts as those in the conventional example are indicated by the same reference numerals, and the explanation of the overlapping parts in terms of structure, function, and effect will be omitted.

A tension spring 20 is interposed between the extending end 13'a of one link 13' of the quick-action type locking mechanism 12 and the handle 1' on the movable blade side attached to the tip base frame 2'.

In addition, this tension spring 20 helps extend both links 13 and 13' when gripping the handle 1°1', and also prevents the tip base frame 2' from expanding as the handle 1' rotates. Link 1
3 and 13', the movable blade 8 becomes the fixed blade 9.
It is also possible to prevent the distal end base frame 2' from expanding before it abuts against the base frame 2'.

One embodiment of the present invention is as described above, so both handles 1,
1' is closed inward against the elastic force of the spring 4, so that when the sheathing section 75 of the electric wire 7 is stripped off after the sheathing section 7a is cut, the link 13' of the locking mechanism 12 is closed at the tip. As the base frame 2' expands outward, it receives the elastic force of the coiled spring 16, and the other link 13 overlaps with the tip base frame 1 around the pin 14', and the pivoting end side This prevents both end base frames 2, 2' from closing when pressed into a straight line.

At this time, the tension spring 20 interposed between the extending end 13'a of the link 13' and the handle 1' causes the link 13' to This helps the extending end 13'a side pivot downward, and as shown mainly in FIG. The tensile force assists the distal end base frame 2' to open outward.

In this case, the tension spring 20 helps extend both links 13, 13' when gripping the handles 1, 1', and also prevents the tip base frame 2' from expanding as the handle 1' rotates. Link 1
3 and 13' prevents the tip base frame 2' from expanding before the movable blade 8 collides with the fixed blade 9.

By releasing the grip on the handles 1 and 1', the link 10 lifts the movable wire holding member 6 relative to the tip base frame 2, and the link 10' moves the movable blade 8 to the tip base frame 2. ′.

And the extending end 13' of the link 13' of the locking mechanism 12
a is pushed up by the shoulder 1'b of the handle 1', so that both links 10 and 10' are connected to each other around the pins 14 and 14', and the inner ends of the links 10 and 10' are connected to the spring foot 1 of the coil spring 16.
It rapidly pivots downward against the elastic force of 6a and returns to its original position as shown in FIG.

However, in this case, since the link 13' is tensioned by the tension spring 20, both links 13, 13' of the locking mechanism 12 are internally connected in the tip base frame 2' to which this link 13' is pivotally connected. Direction (direction of arrow A in Figure 7)
Swinging toward the other tip base frame 2, which is caused by the reaction force caused by the rapid return to the top, is prevented.

Therefore, since the movable blade 8 is maintained in an open state with respect to the fixed blade 9, the conductor part 7b after the covering part 7a is peeled off will not be cut or damaged.

As mentioned above, the present invention prevents the movable blade from swinging when closing the base frame at both ends after stripping off the coating, thereby eliminating the lowering of the movable blade relative to the fixed blade and cutting the conductor of the wire.
It has the effect of preventing injury.

In addition, the tension spring assists the extension of both links of the locking mechanism when the pair of handles are tightened, and the two links of the locking mechanism support the expansion of the tip base frame as the handle on the movable blade side rotates. By suppressing this, it is also possible to prevent the tip base frame from expanding before the movable blade collides with the fixed blade.

[Brief explanation of drawings]

FIGS. 1 to 7 show an example of a conventional wire stripper, of which FIG. 1 is a front view, and FIGS. 2 to 7 show wires inserted, wire held down, sheathed part cut, FIG. 6 is a partially cutaway front view illustrating each process in the order of operation: a state in which the covering portion is peeled off, a state in which the covering portion is completely peeled off, and a state in which the conductor portion is cut. FIGS. 8 to 10 show an embodiment of the present invention,
Of these, FIG. 8 is a front view, FIG. 9 is a partially cutaway front view showing the state in which the electric wire is inserted, and FIG. 10 is a partially cutaway front view showing the state after the coating is peeled off. 1.1'--Handle, 1'a...Shoulder, 2,2'...
Tip base frame, 2a, 2'a... storage cavity, 2b,
2'b...Abutment standing wall, 2c, 2'c...Wire insertion hole, 2d...Fixed electric wire holding part, 4...Spring, 5,
5'... Holding plate, 5a, 5'a... Wire insertion hole, 6
... Movable wire holding material, 6a... Holding part, 7... Electric wire, 7a... Covering part, 7b... Conductor part, 8... Movable blade, 9... Fixed blade, 12 ...Lock mechanism, 16.
...Circular spring, 16a...Spring foot, 16a1...Bent end, 20...Tension spring.

Claims (1)

[Scope of utility model registration request] A pair of handles are pivoted on the same axis to a tip base frame each having a fixed wire holding part and a fixed blade, and by gripping the handles, the movable wire holding member is moved against the fixed electric wire holding part. A wire stripper is provided in which movable blades are provided to move forward and backward with respect to a fixed blade, and the movable blades are expanded in a direction away from the movable electric wire holding member to strip the covering portion of the electric wire from the core wire, The outer ends of the pair of links are pivotally connected to the tip base frames so that they are expanded as the pair of tip base frames expand, and the inner ends of the links are pivotally connected to each other, and the fixing A quick-action locking mechanism is formed by spring-energizing one ring on the wire holding part side, and one handle on the movable blade side and the extending end of the link on the movable blade side. A wire stripper characterized by a tension spring interposed between the wire strippers.