JPH04172907A - Cutting off device for covering of shielded wire - Google Patents

Abstract

PURPOSE:To beautifully cut off the sheath of a shielding wire by making a cutter provided with a cutter holder which is centrifugally moved by the rotation of a rotor to act on the entire periphery of the shielded wire set at the center of the rotor. CONSTITUTION:When a start button attached to a front frame is pressed, a motor is started and a rotor 3 starts to rotate. As the rotor 3 rotates, an centrifugal force acts on a cutter holder 12 which rotates together with the rotor 3 in an integral state and the holder 12 moves to a central projecting section 12c by compressing a spring 13. As a result, a cutter 19 approaches the center of the rotor 3 and gets into a shielded wire 14 at the rotating center of the rotor 3 while the cutter 19 rotates together with the rotor 3. Thus the cutter 19 cuts into the section A of the wire 14 around the entire periphery. The moving limit of the cutter holder 12 is adjusted by means of an adjusting bolt 23 so that the cutter 19 does not cut the inner insulating covering 14c of the wire 14, but the outer sheath 14b only.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for cutting off the insulation coating of a shielded wire such as a coaxial cable.

(Prior Art) Various devices have been developed and put into practical use as devices for cutting off shielded wire sheathing, but a typical one is to cut shielded wire between a pair of cutters that are arranged opposite each other so that they can be relatively approached. After pushing the end of the wire into place, the cutter is forcibly moved closer and the shield wire is relatively rotated around its axis to form a cut of a constant depth around the entire circumference of the insulation coating. Some wires are constructed so that the insulation coating can be pulled out and removed from the wire ends.

(Problem to be Solved by the Invention) In the conventional device described above, it is not possible to easily adjust the cutting force when the pair of cutters are moved close to each other to penetrate the insulation coating of the shield wire, and the insulation coating is hard. If the shield wire is not easily deformed by the cutting force, it can be processed relatively well, but in the case of a shielded wire with soft insulation coating, the shield wire may be deformed by the cutting force or the relative rotation between the shield wire and the cutter may occur. Due to twisting and deformation of the shield wire due to cutting, uncut strands, disordered cut ends, and excessive cutting of the shield wire tend to occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shield wire sheath cutting device that can easily adjust the cutting force of the cutter and can remove the sheath well.

(Means for Solving the Problems) In order to achieve the above object, a shield wire sheath cutting device according to the present invention includes a rotor that is rotationally driven by a drive mechanism around a fixed axis, and a centrifugal A cutter holder movably attached to a rotor, a cutter attached to the cutter holder and moved toward the center of the rotor by centrifugal movement of the cutter holder, a limiting means for adjustable abutment regulation of the centrifugal movement limit of the cutter holder, and a cutter holder. The cutter is precisely constructed to include a return spring for returning the cutter, and a single shield wire holding means for loading and holding the shield wire supplied along the rotor axis within the locus of movement of the cutter.

(Function) According to the configuration of the present invention, when the rotor is rotated with the shielded wire to be processed loaded along the rotor axis, the cutter holder rotating together with the rotor is moved by centrifugal force, and the cutter attached to the cutter holder is moved by centrifugal force. The wire approaches the center of rotation while rotating around the rotor axis, is loaded into the center, and is inserted into the 1-ninold wire and cut into its entire circumference to a predetermined depth.

In this case, the cutting force applied to the outer periphery of the shield wire can be adjusted by appropriately setting the rotational speed of the rotor or the weight of the rotor. Further, by adjusting the movement limit of the cutter holder, the depth of cut can be arbitrarily set.

(Embodiment) FIGS. 1 to 5 show an embodiment of a shield wire sheath cutting device according to the present invention.

Figure 5 shows the overall external comparison of this device, and the reference numeral l in the figure
2 is a base, 2 is a frame erected at its front end, 3 is a rotor, 4 is an electric motor as a rotor drive mechanism, and 5 is a motor control unit.

FIGS. 1 and 2 show a longitudinal side view and a longitudinal rear view of the rotor section.

The rotor 3 has a rotor body 6 and a boob part 7 concentrically superimposed and connected by screws 8. It is rotatably horizontally supported via a bearing IO by a boss plate 9 which is bolted to the boss plate 9.

A guide groove 11 is formed on the rear surface of the rotor body 6, and a cutter holder 12 is fitted and supported in the guide 71111 so as to be slidable in the radial direction.

This cutter holder 12 includes a pair of leg portions 12a located on both sides of the rotor axis P, an arch portion 12b connecting both side portions 12a, and a center extending from the center of the arch portion +2b in the opposite direction to the leg portions 12a. The guide groove 11 is configured to have a shape that allows the leg portions 12a, 12b, and central protrusion 12c to engage and slide only in the radial direction of the rotor.

The cutter holder 12 is located closer to the arch portion +2b than its center of gravity or the rotor axis P, and is moved toward the central protrusion 12C by centrifugal force when the rotor 3 rotates. Furthermore, a pair of left and right return springs 13 are installed between the left and right portions of the arch portion I2b and the inner surface of the guide groove 1j to press and bias the cutter holder 12 toward the leg portion 12a. The cutter holder I2, which has been centrifugally moved outward, is automatically moved back.

A shield wire 14 is installed at the center of the rotor body 6 and the pulley 7.
from the end of the support shaft 6aMi to the pulley 7.
Guide holes 15 and 16 leading to the back surface are formed through the shield wire holding means.

Further, a groove 17 shallower than the guide groove 11 is formed on the rear surface of the rotor body 6 and communicates with the leg portion 12a of the cutter holder 12 in a direction perpendicular to the leg portion 12a, and a slit 18 is formed at the lower end of each leg portion 12a. formed, both slits 1
A cutter 19 is inserted over the length of 8, and is fixed by tightening with a locking bolt 20 attached to each leg 12a. The cutter 19 used here is a replaceable blade of a commercially available general-purpose cutter, and the blade edge thereof is directed toward the arch portion +2b side.

An auxiliary weight 21 is attached to the tip of the central portion 12c of the cutter holder 12 by a lever 22, and by replacing this auxiliary weight 21, the weight and center of gravity position of the entire cutter holder 12, in other words, the centrifugal force during rotation can be adjusted. is now possible.

In addition, a stopper bolt 23 facing the base end of each leg 12a is mounted on the rotor main body 6 in parallel with the moving direction of the cutter holder I2, and the stopper bolt 23 limits the movement of the centrifugally moving cutter holder 12, and also controls the movement of the cutter holder I2. The contact restriction position can be adjusted.

The pulley 7 is a transmission member that transmits rotational force to the rotor body 6, and also has a function as a cover member that closes the guide groove 11 of the rotor body 6 from the rear surface. The belt 2 is attached to the output pulley 24 of
They are connected in a winding manner via 5.

Note that this pulley 7 has a cutter 1 attached to the cutter holder 12.
A long hole 2 in which the head of the stopper holder 20a for fixing the head is located.
6 is formed so that the locking bolt 20 can be tightened or loosened from the pulley 7 side.

The shielded wire sheath cutting device of the present invention is constructed as described above, and its operating procedure will now be described with reference to FIG. 4.

In this case, the shield wire 14 includes a core wire 14a and an outer wire 14b.
and the inner insulation coating 14c and the outer insulation coating 14, respectively.
The target is the coaxial cord surrounded by d. After turning on the power switch 27, insert the shielded wire 14 with the tip cut off into the guide hole 15 from the front of the front frame 2 and connect it to the rear of the rotor 3. Penetrate it to the set position.

In this case, a positioning switch 28 is installed at the rear of the extension of the rotor axis P, and when the tip of the shielded wire 14 comes into contact with this switch 28, a buzzer or lamp (not shown) is activated, and the shielded wire 14 has been inserted and set to the predetermined position.

When the start button 29 provided on the front frame 2 is pressed, the electric motor 4 is started and the rotor 3 rotates, centrifugal force acts on the cutter holder 12 that rotates together with the rotor 3, and the cutter holder 12 compresses the spring I3. While the central protrusion 12
The cutter 19 moves toward the center of the rotor 3 as the cutter 19 moves toward the center of the rotor 3.

Then, as the cutter 19 rotates together with the rotor 3, it sinks into the shield wire 14 at the center of rotation, as shown in FIG.
a) Make a cut all the way around part A shown inside. The depth of this cut is determined by cutting the outer wire +4b and cutting the inner layer insulation coating 14.
The limit of movement of the cutter holder 12 is preset by the adjustment bolt 23 so that the depth does not reach c.

When the cutting is completed, the rotor 3 is stopped, the cutter holder 12 is returned to its original position by the spring 13, the shield wire 14 is pulled out from the guide hole 15, and the outer insulation coating 14 at the tip is removed from the A section.
d and the outside wire 14b are pulled out and removed, resulting in the state shown in FIG. 4(b).

Next, from the guide hole 15, the shield wire 14 shown in FIG.
is inserted and set to rotate the rotor 3. In this case, the amount of insertion of the shield wire is set so that the cutter 19 acts on part B in FIG. 4(b), and the cutting depth is adjusted so that it is only the thickness of the outer insulation coating 14d. Adjust the bolt 23 in advance. After the cut is completed, the outer insulation coating 14d on the tip side from the cut position is removed to expose an appropriate length of the outer line 14b as shown in FIG. 4(C).

Next, after adjusting the cut depth, a cut is similarly formed in the 0 part of the inner layer insulation coating 14c, and the inner layer insulation coating 14c on the tip side is removed to form a core wire as shown in FIG. 4(d). 1
Expose 4a.

In the above process, the rotation speed of the electric motor 4 and the weight of the auxiliary way 1-21 are adjusted depending on the type of the shield wire 14 to reduce the centrifugal force of the cutter holder 12, that is, the cutter 1.
Adjust the cutting force by 9.

Also, if the cutter 19 loses its sharpness, the retaining bolt 20
Loosen and adjust the position of the cutter 19. Further, the cutter 19 can be replaced with a new one.

The present invention can also be modified and implemented in the following forms.

(1) Two sets of cutter holders 12 that move centrifugally toward the center of the rotor are provided, and the shield wire 14 is connected to a pair of cutters I.
9 to make a cut so as to sandwich it.

(2) Adjust the strength of the return spring 13 to adjust the cutting force acting on the shield wire 14.

(3) Adjust the inner diameter of the guide 15.16 to match the diameter of the largest shielded wire, replace and attach various guide sleeves with different inner diameters to this guide hole 15.16, and align the shielded wires 14 with different diameters. It can be loaded in any condition.

(Effects of the Invention) As explained above, according to the present invention, the cutter provided in the cutter holder, which moves centrifugally as the rotor rotates, acts on the entire circumference of the shielded wire set at the center of the rotor.
The cutter cuts smoothly according to the hardness of the coating, making it possible to remove the coating with a clean finish without undercutting or overcutting.

Furthermore, since the cutter is operated centrifugally, the cutting force can be easily adjusted by means such as rotor rotational speed and weight adjustment, and stable sheath removal can be performed with an appropriate cutting force depending on the hardness and softness of the shield wire.

[Brief explanation of drawings]

Fig. 1 is a vertical side view of the main part, Fig. 2 is a longitudinal cross-sectional rear view of the main part, Fig. 3 is an exploded perspective view of the rotor, and Figs. 4 (a) to (d).
5 is a perspective view showing the processing status of the shield wire over time, and FIG. 5 is a perspective view of the entire apparatus. 3... Rotor, 4... Electric motor (rotor drive mechanism), I2... Cutter holder, I3... Return spring, I4... Shield wire, 15.16... Guide hole (shield wire holding means), 19
...Cutter, 23...Stopper bolt (limiting means). Newcomer Omron Co., Ltd. Agent Patent Attorney Oka 1) Hidedai Kazu 5rl! J

Claims (1)

[Claims] (1) A rotor (3) rotatably driven around a fixed axis by a drive mechanism (4), and a cutter holder (3) attached to the rotor (3) so as to be centrifugally movable as the rotor (3) rotates.
12), a cutter (19) that is attached to the cutter holder (12) and moves toward the center of the rotor (3) by centrifugal movement of the cutter holder (12), and a cutter (19) that is attached to the cutter holder (12) and moves toward the center of the rotor (3)
2), a limiting means (23) for adjustable contact regulation of the centrifugal movement limit, a return spring (13) for returning the cutter holder (12), and a shielded wire supplied along the axis of the rotor (3). Shield wire holding means (15) (16) for loading and holding (14) within the movement trajectory of the cutter (19)
A shielded wire sheath removal device comprising: