JPH0517766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wire stripper that can automatically strip the outer sheath of a covered wire while twisting the outer sheath.

(Prior Art and its Problems) A general wire stripper is used solely for the purpose of stripping off the outer sheath, and the exposed covered wire tends to come loose after the outer sheath is stripped off. For this reason, the operator had to add twist. Because of this, improvements have been made to conventional wire strippers, and devices that can strip and twist at the same time have been developed.

However, even with this improved wire stripper, the twisting may be insufficient depending on the stripping length. This is because in the conventional method, when twisting, the non-stripped side was rotated, and in this state it was stripped straight to apply the twist, so the twist was added to the stripped side. This is because the force was not transmitted sufficiently. Therefore, if the stripping length is long, the twist will be good, but if the stripping length is short, the twist will not be sufficient. I had to twist it depending on the texture.

Recently, there has been an increasing demand for coated wires with short stripping lengths for connection of printed circuit boards, etc., and an immediate solution to the above problems has been desired.

Therefore, in order to meet this need, the present invention aims to provide a wire stripper that can reliably and efficiently twist even coated wires whose stripping length is short.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pair of cutters for making incisions in the outer sheath of the covered wire, and twist rollers for twisting the covered wire. a head is disposed to face the feeding direction of the covered wire, and both heads are supported so as to be removable so as to sandwich the covered wire, and the heads are supported so as to be separable from each other so as to sandwich the covered wire. In order to perform cutting, twisting and stripping of the coated wire, each head is connected to a drive mechanism for rotating and retracting the coated wire in the feed direction;
Furthermore, a clamp mechanism is provided in front of both the beds, which can be moved in and out for clamping the non-stripped side of the coated wire during the backward movement of both heads.

(Actions and Effects of the Invention) Therefore, according to the above configuration, the covered wire is first sandwiched between both heads. Next, as both heads rotate, a cut is made in the coated wire sheath using a cutter. Thereafter, both heads move back while rotating along the feeding direction of the coated wire, so that the twist rollers apply the twist and strip the coated wire. At this time, the non-stripped side of the coated wire is clamped by a clamp mechanism.

In this way, in the present invention, the coated wire is rotated and retreated on the stripped side, and this side is directly twisted, so that twisting can be reliably applied.

Furthermore, since these operations are automatically performed by the drive mechanism, work efficiency is also improved.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

In addition, in the following explanation, the description regarding the direction is the first one.
This shall be done based on the diagram.

In the figure, reference numeral 1 denotes a base, and a mounting base 2 having side walls 2a and 2b facing each other in the front and back is provided in an overhanging manner on the front side thereof. A pair of guide shafts 3 are installed between the side walls 2a and 2b of the base 2 on the front side and the back side, and slidably support the slider 4. The slider 4 is provided with a pair of upper and lower heads each having a cutter 5 and a twist roller 6 for stripping and twisting the coated wire W. The lower one of these is a fixed head H1, and the upper one is a movable head H2 that can swing vertically.

First, the fixed head H1 will be explained. The fixed head H1 is rotatably attached to a bearing part 7 formed integrally with the front part of the slider 4. This fixed head H1 is connected to the lower spline shaft 8. The spline shaft 8 includes a support block 9 integrally erected at the rear of the slider 4 and a rear wall 2b of the base 2.
A pair of front and rear support plates 10 erected on the back of the
a and 10b, and are supported so as to be axially displaceable and rotatable.

On the other hand, the upper spline shaft 11 for the movable head H2 is disposed parallel to the lower spline shaft 8, and similarly to the above, is attached to both support plates 10a, 10b so as to be axially displaceable and rotatable. . The movable head H2 is connected to the spline shaft 11 via a universal joint 12. In addition, the movable head H2 is connected to the swing arm 13.
It is rotatably suspended and supported from a cutter bracket 14 at the front end.

The swing arm 13 is attached to the upper end of the support block 9 via a downward U-shaped center bracket 15, and is supported by a pin 16 so as to be swingable in a vertical plane. The movable head H2 is always held in an inclined position away from the fixed head H1, and as the swing arm 13 swings clockwise in the figure, it approaches the fixed head H1 to adjust the thickness of the covered wire W to be worked on. It can be set to be held in a horizontal position with corresponding spacing.

Next, a driving mechanism for causing the heads H1 and H2 to perform stripping and twisting operations will be described. The swing arm 13 extends rearward passing above both support plates 10a and 10b, and is bent diagonally downward as it goes rearward from the support plate 10b, and is bent downward at a substantially right angle at its terminal end. . On the other hand, on the back side of the bent portion of the swing arm 13, a rotary drum 17 is provided which is rotationally driven by a drive source (not shown), and a drive roller 18 is attached to the outer circumference of the drum 17 so as to be freely reversible. . The drive roller 18 is bent at a right angle to the inner circumferential surface of the obliquely bent portion of the swing arm 13 (hereinafter, this portion will be referred to as the approach movement surface 19 of the movable head H2) as the rotating drum 17 rotates. The swing arm 13 is in sliding contact with the inner circumferential surface of the section (hereinafter, this section is referred to as the stripping and twisting operation surface 20), and this enables the swing arm 13 to swing and retreat by a predetermined stroke, and in this example, It is set so that the work on the covered wire W is completed during one rotation of the rotating drum 17.

Incidentally, when the swing arm 13 reaches its apex while the drive roller 18 is in sliding contact with the approach operating surface 19, it is pushed up the most and the covered wire W is sandwiched between the two heads H1 and H2. However, when the displacement of the drive roller 18 progresses and exceeds the peak, the swing arm 13 swings in a direction that moves the movable head H2 apart.
In this case, since both heads H1 and H2 release the covered wire W, subsequent work (twisting, stripping) on the covered wire W becomes impossible. Therefore, even after the drive roller 18 passes the apex,
For a certain period of time, the covered wire W by both heads H1 and H2
A mechanism is provided to maintain the clamped state (see FIGS. 4 to 7).

That is, an upright arm 21 is pivotally attached to the terminal end of the swing arm 13. This standing arm 2
A row 22 is attached to the lower end of the base 1, and can be raised by rolling on a rail plate 23 laid on the base 1 in the front-rear direction. Further, a holding arm 24 is fixed to the upright arm 21 so as to be perpendicular to the upright arm 21 and facing rearward. This holding arm 24
A buffer pad 25 is attached to the upper surface near the tip of the swing arm 13, and is normally in contact with the side end surface of the swing arm 13 to regulate the swinging position of the swing arm 13. On the other hand, an inverted L-shaped stopper piece 27 having a magnet 26 attached to its upper surface is erected at the back side of the rear portion of the rail plate 23. The holding arm 24 is held while the upright arm 21 is standing (both heads H1 and H2 are connected to the covered wire W).
27), the swing arm 13 can be held in its swinging position by being placed on the upper surface of the stopper piece 27.

Furthermore, a convex portion 28 is provided on the front side of the upright arm 21.
is formed so as to protrude inward,
It can come into contact with the circumferential surface of the drive roller 18.
Therefore, when the upright arm 21 is pushed by the drive roller 18 in the upright state, both the upright and holding arms 21, 24 are rotated clockwise, and as a result, the holding arm 24 and the stopper The engagement with piece 27 will be released.

Next, a drive mechanism for stripping and twisting will be explained.

A fixing block 29 is provided on the base 1 at a position on the near side of the rail plate 23, and the block 29 has a push-up arm 30 and a mounting arm 31, each having an L-shape and each having a support pin. 71 so that it can rotate in a vertical plane.

The tip of the rack push-up arm 30 is hooked onto the lower end of a rack member 32 vertically interposed between the support plates 10a, 10b. The rack member 32 includes both support plates 10a, 1
A pair of upper and lower guide rollers 33u and 33l freely rotatably supported between 0b and both spline shafts 8,
11, and is supported so as to be movable in the vertical direction. Also, a pair of upper and lower pinion gears 70 are provided with rack teeth 32a cut along the longitudinal direction, and are fitted onto both spline shafts 8 and 11 in a state allowing displacement in the axial direction.
u and 70l are meshed with each other. Therefore, the rack member 32 by the rack push-up arm 30
Both spline shafts 8,
As a result of the rotation of the head 11, both heads H1 and H2 rotate.

On the other hand, a connection lever 34 is interposed between the mounting arm 31 and the rack push-up arm 30. The lower end of the connection lever 34 is pivotally attached to the easy push-up arm 30, and the upper end thereof is sandwiched between the mounting arm 31 and a top plate 35 extending along the surface thereof, and has a removable pin. It is fixed by a 36 insertion. Here, in this example, the upper end side of the connection lever 34 has two insertion holes 37a,
37b is provided. Due to this, the attachment position of the connection lever 34 relative to the top plate 35 side can be changed. In other words, the upright angle of the mounting arm 31 with respect to the easy push-up arm 30 can be adjusted, and as will be described later, the mounting arm 31 side can be adjusted to be inside or outside the movement locus of the drive roller 18. It is used to switch whether or not to twist the coated wire W. In this example,
The insertion hole 37a on the front side in the drawing is in the twisting position, and the insertion hole 37b on the rear side is in the non-twisting position.

A back plate 38 is attached to the back side of the mounting arm 31.
is installed. Furthermore, the back plate 38
A pressing part 39 integrally projects forward at the upper end, and when the connecting lever 34 is fixed in the above-mentioned twisting position, the swing arm 1
It is set so as to protrude slightly forward from the stripping and twisting operation surface 20 of No. 3. In other words, the pressing portion 39 can be pressed before the driving roller 18 presses the stripping and twisting surface 20.

Conversely, when the connection lever 34 is locked in the non-twisting position, the mounting arm 31 rotates counterclockwise in the drawing, and as a result, the back plate 38 is displaced to a position outside the movement locus of the drive roller 18. It's like this. As a result, even when the drive roller 18 is displaced, the rear plate 38 is not pushed, so the lifting operation of the rack push-up arm 30 is not performed, and both heads H1 and H2 are not rotated. In other words, no twist is applied by both twist rollers 6.

Furthermore, in this example, a twist strength adjustment knob 40 is provided on the top plate 35 in order to adjust the strength of the twist applied (see FIGS. 20 and 21).
This knob 40 has a shaft portion that is rotatably inserted into the top plate 35 and the mounting arm 31, and an eccentric pin 4 that is eccentrically attached to the shaft end.
1 is inserted into the back plate 38 in a manner that prevents it from coming off. Therefore, the twist strength adjustment knob 40
By the rotation operation, the amount by which the lower front end of the back plate 38 protrudes from the mounting arm 31 is adjusted. Therefore, the back plate 38 is
8 (the angle of inclination of the mounting arm 31) changes, the lifting amount of the push-up arm 30 changes, and as a result, both heads H
The angular displacement amount of 1, H2 is adjusted.

Then, while being stripped and twisted,
A mechanism for clamping the covered wire W will be explained (see FIGS. 12 to 15).

In front of the fixed head H1, the base 2
A plate 42 is attached to the front side wall 2a.
A pair of clamp pieces 43, 43 are vertically opposed to each other on the front surface of the plate 42, and are attached with pins 44, 44, respectively, so that they can be opened and closed in a plane perpendicular to the plate 42. be. The upper parts of both clamp pieces 43, 43 protrude upward from the plate 42, and the upper ends thereof have a clamp surface 45 for clamping the covered wire W,
45 are formed facing each other. On the other hand, on the lower end side, a return spring 46 for unclamping is interposed between the clamp pieces 43, 43 to bias the clamp pieces 43 in a direction to expand them. During this time, a clamp shaft 47 is also operated for causing both clamp pieces 43, 43 to perform a clamping operation.
The tip of the is facing. A hook piece 48 is attached to the end of the shaft 47, which can bring both clamp surfaces 45 closer together by tensioning between the two clamp pieces 43, 43 as the clamp shaft 47 angularly displaces. Further, a stopper piece 49 is attached to the clamp shaft 47 on the front side of the hook piece 48, and this stopper piece 49 extends to the right in FIGS. It is projected to. This protruding portion is removably engaged with a hook lever 50 attached to the outer surface of the slider 4, and the engagement is disengaged as the slider 4 retreats after the cutting operation on the covered wire W. It is about to be lifted.

Now, this clamp shaft 47 is connected to plate 4.
2. Base 2 and support plates 10a, 10b
It extends along the front-rear direction and is rotatably supported. Further, a swing lever 51 is fitted to the clamp shaft 47 between the support plates 10a and 10b, and a locking pin 52 projects horizontally from one end of the lever 51 toward the rear. ing. Further, the tip of the locking pin 52 is formed to have a slightly smaller diameter, and the lower end side of a spring receiving piece 53 having an inverted L shape is loosely fitted therein so as to be prevented from coming off.

On the other hand, a pin shaft 54 is protruded from the center of the swing arm 13 toward the front side. and,
A spring rod 55 that loosely inserts into the top surface of the spring receiving piece 53 is connected to this pin shaft 54, and swings the swinging lever 51 in the direction of pushing up the spring receiving piece 53, thereby moving the clamp shaft 4.
A clamp spring 56 is wound around the clamp spring 56, which biases both clamp pieces 43, 43 in the closing direction through an angular displacement of 7.

An elongated hole 57 is formed in the upper part of the spring rod 55, and the spring rod 55 is engaged with the pin shaft 54 while being allowed to be displaced.

In addition, 58 is a spring for pulling down the swing arm 13, and the pin shaft 54 and the front support plate 1
Mounting pin 59 protruding rearward from 0a
is connected between. Further, between the mounting pin 59 and the upper end of the rack member 32, there is a
A spring 60 for pulling down the rack member 32 is interposed. Further, on the back side of the swing arm 13, there is a spring 61 for returning the swing arm 13 to the front.
However, the rear side of the arm 13 and the front support plate 1
It is interposed between the upper part of 0a.

Next, a mechanism for adjusting the outer diameter of the covered wire W (thickness of the covered wire W) will be explained (see FIGS. 16 and 17).

This mechanism is provided on the cutter bracket 14 that supports the movable head H2, and is intended to be adjusted by variably adjusting the height at which the cutter bracket 14 is attached to the swing arm 13.

A cylindrical portion 14a of the cutter bracket 14 that holds the movable head H2 is integrally formed with an upright portion 14b facing each other, and the swing arm 13 is sandwiched between the erected portions 14b. The swing arm 13 is attached by a thickness adjustment knob 62 inserted from the front side of the upright portion 14b. The shaft portion of the thickness adjustment knob 62 has a small diameter shaft portion 62a that fits into the swing arm 13, and a cutter bracket 14 that is eccentric to the small diameter shaft portion 62a.
The large diameter shaft portion 62b fits into the large diameter shaft portion 62b. Thus, the cutter bracket 14 is assembled so that it can be vertically displaced by a desired amount by operating the thickness adjustment knob 62. Although not shown in detail, the thickness adjustment knob 62 has a scale for adjusting the thickness.

In addition, in this example, in order to facilitate the adjustment operation when the thickness of the covered wire W is not known in advance, the swing arm 13 is connected from the upper end of the cutter bracket 14.
A thickness regulating plate 63 extends upward. That is, the distance between the regulating plate 63 and the swing arm 13 is set to correspond to the working distance when both heads H1 and H2 are close to each other.

Finally, the mechanism for adjusting the cutting depth for the covered wire W will be explained (Figs. 1, 18 and 19).
(see figure).

Both heads H1 and H2 are respectively provided with a cutter 5 for making cuts in the covered wire W and a twist roller 6 for twisting the wire.
Since both heads H1 and H2 have almost the same configuration, the detailed explanation will be given only for the movable head H2.
Only the fixed head H1 will be described with the same reference numerals and its explanation will be omitted.

The movable head H2 is formed in the shape of a round bar, and a twist roller 6 is provided at the front end of the movable head H2 via a flange portion 64 for preventing the cutter bracket 14 from coming off. The twist roller 6 has knurled lines on its outer peripheral surface. Further, a mounting hole 65 is bored in the front end surface of the movable head H2, and a cutter holder 66 is removably fastened thereto with a tightening bolt 67. The cutter holder 66 removably fits the ring-shaped cutter 5 therein.

The mounting hole 65 is formed eccentrically with respect to the axis of the movable head H2. Therefore, by rotating the cutter 5, the amount of protrusion of the round tip of the cutter 5 from the twist roller 6 can be adjusted. Although not shown in detail, the outer peripheral surface of the flange portion 64 of the movable head H2 is provided with a scale for adjusting the cutting depth.

18 and 19, C indicates the center of the cutter 5, O the center of the attachment hole 65, and T the center of the twist roller 6, respectively.

In addition, in order to adjust the stripping length, a backing plate 68 is provided on the outer peripheral surface of the bearing portion 7 of the fixed head H1. This patch plate 68 is a bracket 69
The wires are mounted so as to be aligned with the feed height of the covered wire W, and the mounting position can be variably adjusted in the front-rear direction. That is, the stripping length is adjusted by abutting the coated wire W fed from the right side in the figure and regulating the feeding length. Although not shown in detail, the bracket 69 is provided with appropriate scales for adjusting the stripping length.

Subsequently, the functions and effects of this example formed as described above will be specifically explained.

Before starting work, make the following preliminary adjustments to the wire stripper.

Adjustment of Stripping Length As described above, this adjustment work is performed by sliding the patch plate 68 according to the length of the cover line W to be stripped.

Adjusting the Thickness of the Covered Line W When the thickness of the covered line W is known, the thickness adjustment knob 62 is operated according to a scale value (not shown). In this case, since the large diameter shaft portion 62b is eccentric, the cutter bracket 14 can be moved to the swing arm 1 by operating the thickness adjustment knob 62.
3, move up and down by a predetermined amount, and both heads H
The interval when 1 and H2 face each other is adjusted to the interval corresponding to the thickness of the covering line W.

If the thickness of the covered wire W is unknown, insert the covered wire W to be worked on between the regulating plate 63 and the swing arm 13, and operate the depth adjustment knob 62 to bring the covered wire W into a tight state. Sandwich it with.
In this way, if the distance between the regulating plate 63 and the swing arm 13 is defined, the cutter bracket 14
The installation height is adjusted to the desired height. The interval adjusted in this way is, as mentioned above,
Since this corresponds to the working interval when both heads H1 and H2 are close to each other, the thickness can also be adjusted by the above procedure.

Adjustment of cut depth This is done in order to make a cut corresponding to the thickness of the outer skin of the covered wire W. First, the tightening bolt 67 is loosened, and the cutter holder 66 is rotated according to the indicated value on a scale (not shown). In this case, since the attachment hole 65 with respect to the cutter holder 66 is formed eccentrically, the amount by which the cutting edge of the cutter 5 protrudes from the twist roller 6 according to a predetermined angular displacement of the cutter holder 66, that is, the depth of cut. The height is adjusted. This operation is also carried out for the fixed head H1.

Adjustment of presence or absence of twisting Depending on the location of use, it is not always necessary to add twist to the coated wire W, so this adjustment is made in this case. That is, if twisting is required, select the insertion hole 37a on the front side in the figure as the insertion position of the pin 36, and if twisting is not required, select the insertion hole 37b on the rear side in the figure by raising the mounting arm 31. Select.

Adjustment of the twist strength is performed by rotating the twist strength adjustment knob 40. When strong twisting is required, the above operation is performed to cause the back plate 38 to protrude from the mounting arm 31 using the eccentric pin 41 provided at the eccentric position of the shaft portion of the knob 40. Conversely, in the case of weak twisting, the back plate 38 is adjusted to be almost flush with the mounting arm 31.

Once the above preliminary work is completed, the actual work will begin. However, in the following description, it is assumed that the covered wire W is twisted, and the degree of twist is strong.

Now, when the covered wire W is fed from the right side in FIG. 1 by a feeding device (not shown), the covered wire W passes above both the clamp pieces 43, 43 and the fixed head H1, and its front end is It is abutted against the plate 68. As described above, this allows the stripping length to be adjusted to a predetermined length. In this state, when a drive source (not shown) drives and the drive roller 18 rotates together with the rotary drum 17 in the counterclockwise direction shown in the figure, the roller 18 first comes into contact with the approach movement surface 19 of the swing arm 13 (see FIG. 4). (See Figure 7). Drive roller 18
further angular displacement upwards along the approach working surface 19 causes the drive roller 18 to move against the spring 5
8 and pushes up the swing arm 13. Therefore, the swing arm 13 swings clockwise about the pin 16, and the movable head H2 swings downward and approaches the fixed head H1. When the drive roller 18 reaches the apex of its movement locus, the coated wire W is moved between both heads H1 and H2.
is pinched.

In addition, as the swing arm 13 swings as described above, the pin shaft 54 is inserted into the elongated hole 5 of the spring rod 55.
7 from the lower end locking position to the upper end locking position. When the swing arm 13 is lifted until the drive roller 18 reaches the top, the spring rod 55 is pulled up while compressing the clamp spring 56. At this time, the reason why the spring receiving piece 53 is not lifted at the same time is because of the clamp shaft. The clamp shaft 47 is prevented from rotating by the engagement between the stopper piece 49 at 47 and the hook lever 50, and the swing lever 5 is prevented from rotating by the spring receiving piece 53.
This is because the swing of 1 is regulated.

On the other hand, while the swing arm 13 swings as described above, the upright arm 21 gradually stands up at the end of the swing arm 13. In this case, the roller 22 of the upright arm 21 rolls on the rail plate 23. Then, when the drive roller 18 reaches its peak, that is, when both the heads H1 and H2 pinch the coated wire W, the tip of the holding arm 24 is placed on the upper surface of the stopper 27. As a result, the swinging position of the swing arm 13 is maintained in this state. Therefore, even after the drive roller 13 passes the top of the trajectory, the swing arm 13 continues to be held for a certain period of time, and both heads H1, H
The sandwiched state of the covered wire W by the wires W is also maintained.

As the drive roller 18 continues to move, the roller 18
is separated from the approach operation surface 19 of the swing arm 13 and moves to the stripping and twisting operation surface 20. However, prior to this transition, that is, before pressing the stripping and twisting surface 20, the drive roller 18 presses against the pressing portion 39 of the back plate 38. As mentioned above, the insertion hole 37a of the connection lever 34 is in the twisting position (the insertion hole on the front side in the figure).
This is because when the pressing section 39 is selected, the pressing section 39 protrudes slightly forward of the stripping and twisting operation surface 20.

When the mounting arm 31 is pushed together with the back plate 38, the rack push-up arm 30 rotates clockwise via the connection lever 34, so that the rack member 32
is lifted against the spring 60 while being guided by both guide rollers 33u and 33r. For this reason,
Both spline shafts 8, 11 meshing with the rack teeth 32a rotate in the same direction, through which both heads H1, H2 rotate slightly. Therefore,
The respective cutters 5, 5 co-rotate over a predetermined angular range and cut into the outer skin of the covered wire W. In this case, the amount of angular displacement of both cutters 5, 5 is within the range shown by range A in FIG. 19, and specifically, it is enough to cut approximately half the circumference of the outer skin of the covered wire W.

When the above cutting operation is completed, the drive roller 18 comes into contact with the stripping and twisting operation surface 20 of the swing arm 13 and presses this surface together with the pressing portion 39. In other words, the swing arm 13 is
1, the slider 4 retreats while being guided by both guide shafts 3.
As the slider 4 moves backward, the engagement between the hook lever 50 attached thereto and the stopper piece 49 is released, and the clamp shaft 47 rotates as follows. Note that since the hook lever 50 and the stopper piece 49 are only slightly engaged, they are immediately released when the slider 4 retreats. When this engagement is released, the clamp shaft 47 becomes free and its rotation is allowed, so that the spring receiving piece 53 is lifted by the spring force of the clamp spring 56. That is, the swing lever 51 swings and the clamp shaft 47 rotates. At the same time, the hook piece 48 rotates, and both clamp pieces 4
Return spring 46 is used to tension between the lower ends of 3 and 43.
Both clamp pieces 43 close against this, and the covered wire W is securely gripped.

In this grip state, the drive roller 18 moves forward while pushing the stripping and twisting surface 20 away, so that the swing arm 13 continues to move backward. During this time, the upright arm 21 is displaced backward along the rail plate 23, and the holding arm 24 slides on the upper surface of the stopper piece 27.

At the same time, the rack member 32 is also being lifted up. That is, both heads H1 and H2 continue to move backward while rotating. As a result, the outer sheath of the covered wire W is pulled out while being twisted by the twist rollers 6. Therefore, the internal wires are exposed in a securely twisted state.

In this example, the angular range in which the operations of stripping the bushes and twisting are performed is the range indicated by B in FIG. 19.

By the way, depending on the twist strength adjustment knob 40,
When the twist is adjusted to be strong, the lower front end of the back plate 38 slightly protrudes from the mounting arm 31, as described above. Therefore, in case of strong twist, the back plate 38 and the mounting arm 3
Compared to the case of a weak twist in which the arms 1 and 1 are almost flush with each other, the angle of inclination of both the raising and holding arms 21 and 24 is larger, and therefore the lifting amount with respect to the easy push-up member 30 becomes larger. . In other words, that much more twist is added.

Now, after the above, when the convex portion 28 of the holding arm 24 is pushed by the driving roller 18, both the upright and holding arms 21, 24 are rotated clockwise in the drawing. Accordingly, the upright arm 21 rotates so as to slip under the stopper piece, thereby releasing the engagement between the holding arm 24 and the stopper piece 27. Therefore, since the swing arm 13 is gradually pulled down by the spring 58, the movable head H2 side is lifted, and the head H2 is separated from the fixed head H1, releasing the stripped wire sheath.

Further, as described above, the swing arm 13
When the spring rod 55 is lowered, the spring rod 55
Since the spring receiving piece 53 is pulled down via the
The clamp shaft 47 is reversely rotated via the swing lever 51. Therefore, the hook piece 48 stands up, and the return spring 46 opens both the clamp pieces 43, 43.
The covered wire W is gradually opened.

Further, while the displacement of the drive roller 18 progresses as described above, the rack member 32 is pulled down by the spring 60, so that both spline shafts 8, 11
is reversed. Then, when the rack member 32 returns to its original position, the drive roller 18 is separated from the back plate 38. At this time, the drive roller 18 contacts only the convex portion 28 of the holding arm 24 to restrict the return movement of the swing arm 13. Therefore, as the displacement of the drive roller 18 progresses thereafter,
The swing arm 13 returns to its original position while following the drive roller 18 by the spring 58. As the swing arm 13 returns,
This will prepare you for the task again.

By the way, if twisting of the covered wire W is not required, as explained in the preliminary work section, the mounting arm 31 is erected and the insertion position of the pin 36 is selected as the insertion hole 37b on the rear side in the figure. . As a result, the pressing portion 39 of the back plate 38 is adjusted to the outside of the movement locus of the drive roller 18. Therefore, when the drive roller 18 rotates, although the roller 18 causes the swing arm 13 to swing and retreat, it does not swing the upright arm 21 and the holding arm 24, so that the rack member is not pushed up. That is, since both heads H1 and H2 do not rotate, the covered wire W is not cut or twisted. Therefore, the covered wire W is stripped off by the twist rollers 6 from the position where both the cutters 5 have bitten into the outer skin of the covered wire W.

As described above, according to this example, since the covered wire W can be twisted and stripped automatically, work efficiency can be improved. Also, unlike conventional methods, twisting is applied directly on the stripping side, so even if the stripping length is short,
Twisting is guaranteed. Furthermore, it is possible to correspond to the thickness of the covered wire W to be worked, the thickness of the outer skin, the type of covered wire, whether it is twisted or not, and the strength of the twist and the type of work. Can meet your needs.

[Brief explanation of the drawing]

Figure 1 is a left side view of the wire stripper, Figure 2 is a front view of the wire stripper, Figure 3 is a side view of the same, Figures 4 to 7 are
The figures are operation explanatory diagrams showing an overview of the movements of both heads and the raising and holding arms associated with the movement of the swing arm, respectively. Figures 8 and 9 are movement diagrams showing an overview of the movements of the mounting arm and the rack-up member, respectively. Explanatory drawings, FIG. 10 is a cross-sectional view taken along the - line in FIG. 1, FIG. 11 is a cross-sectional view taken along the - line in FIG. 1, and FIG.
The figure is a front view showing the state in which the clamp piece does not clamp the covered wire, Figure 13 is its right side view, and Figure 1
Figure 4 is a front view showing the clamped state.
5 is a right side view thereof, FIG. 16 is a sectional view showing the assembly relationship of the movable head to the cutter bracket, FIG. 17 is a side sectional view showing the attachment part of the movable head, and FIGS. 18 and 19 are FIGS. 20 and 21 are explanatory diagrams of the operation of the cutter when adjusting the depth of cut into the coated wire, respectively, and are side views showing the adjustment operation by the twist strength adjustment knob, respectively. 5...Cutter, 6...Twist roller, 43
... Clamp piece, H1 ... Fixed head, H2 ...
Movable head, W...covered wire.

Claims (1)

[Claims] 1 A pair of heads equipped with a cutter for cutting into the outer skin of the covered wire and a twist roller for twisting the covered wire are disposed so as to face the feeding direction of the covered wire, and Both heads are supported so as to be removable so as to sandwich the covered wire, and in order to perform cutting, twisting, and stripping of the covered wire with the covered wire sandwiched, both heads are rotated and the covered wire is moved. Each head is connected to a drive mechanism for retracting the wire in the feeding direction, and a clamp mechanism is provided in front of both heads that can be attached and detached to clamp the non-stripping side of the coated wire during the retracting movement of both heads. A wire stripper characterized by: