JPS585567B2 - Cable handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting or stripping coatings from electrical cables and the like.

Many tools and devices have been proposed specifically for stripping or scraping insulation from large wires or cables.

This is described in my U.S. Pat. No. 3,204,495.
No. 3,398,610, 3,433,106 and others, and the aforementioned US Pat. No. 3,204,495 describes a tool for scraping off insulation material made of an attachment attached to a cable, and is a tool for cutting or stripping the insulation material. It is included.

As the attachment is rotated around the cable, the cutting tool cuts or strips insulation from the outer periphery of the cable to a desired radial depth or thickness.

The aforementioned US patents are highly relevant to the present invention insofar as they are considered in the context of the problem to be overcome by the present invention.

In particular, the applicant's U.S. Pat. No. 3,398,610 describes a very simple and effective use of a knife to strip cable insulation without affecting or damaging the cable structure in any way. There is.

The present invention relates to enabling and improving the application of the cutters used in the tools and devices of said US patent.

In the process of cutting or stripping coatings from cables, a problem arises in that the cables are constructed with different insulating coatings, with or without shielding.

In the case of a shielded cable, it is necessary to finish the insulation by stripping the insulation from the cable by rolling up the ends of the remaining insulation on the cable.

Finishing this residual coating material is convenient for joining the connector to the bare wire, and allows for quick and easy connection by fitting the sleeve to the curled end.

Therefore, the stripping and cutting device of the present invention is capable of not only cutting but also stripping a desired length of insulation coating from a cable, and processing the remaining coating for other functions or subsequent uses. Can be used for

Similarly, the different insulation materials used make it difficult to cleanly strip the flexible insulation without making a smooth cut or ripping or tearing the edges or ends, which can affect the properties of the cable. Something happens.

The present invention takes advantage of the flexibility of the coating by peeling the coating between two cutting edges.

Such separation of the insulating sheathing between the two cutting edges allows the cable to be handled regardless of the size and nature of the sheathing used.

The foregoing description, as well as other objects, of the features and uses of the invention will be better understood by the detailed description that follows.

Illustrated embodiments according to the invention will be described in conjunction with the accompanying drawings.

As used herein, the term cutting edge refers to a cutting edge that strips the coating from the cable in a plane passing laterally through the axis of the cable.

Therefore, compared to the cutting action occurring on the cutting edge 20, the intersection 13
The cutting action at 8 is delayed so that the shield 30 and insulation coating 32 curl outward slightly as shown in FIG.

Skill is determined by the change in the relative position of the intersection point 138 in relation to the cutting edge 20, and the curl of the sheathing consisting of the shield 30 and sheathing 32, designated F in FIG. The size can be modified depending on the connector that will be fitted onto it.

Therefore, in addition to being able to strip the depth and length of the cable 24, the present invention makes it possible to prepare the fabricated cladding of the cable for advantageous uses and functions.

The cutter 110 of the embodiment shown in FIGS. 2 to 8 has a mounting hole 112.
A cutting edge is shown.

The blade 110 is formed from one or more members.

For ease of construction and illustration, the cutter 110 is shown as two pieces with portions secured together by a number of pins or clips 142.

The first cutting edge 116 is the flat blade 12 terminating the rake face 122.
0 and the second cutting edge 118 has an axial cutting edge 134 terminating in an axially movable surface 136 .

The two cutting edges 116 and 118 have an intersection 138 formed by the cutting edge 144.

Cable 124 has an insulating sheath 128 disposed around the core of electric wire 126 .

By properly securing the cutter 110 mounted on the tool as disclosed in the applicant's aforementioned U.S. patents, the depth of cut of the flat blade 120 can be adjusted to prevent damage to the core wire 126. Insulating sheathing 128 can be cut at a point slightly apart from 126.

The axial cutting edge 134, when secured to the operating tool, is inclined relative to the axis of the cable 124 so that it spirals around the insulation of the cable in the manner depicted by the dashed line in FIG. It has a tendency to twist.

As in the previous embodiment, the cutting edge 134 has two cutting edges 1
16 and 118, and a cut is made in the insulation sheathing 128 before the material approaches the intersection 138.

Similarly, since the intersection point 138 follows the flat blade 120, the flat blade 120 cuts into the insulating sheathing material 128 before the sheathing reaches the intersection point 138 at the tip of the sheathing material that has been completely peeled off from the cable 124. .

The first cutting edge 116 is provided with an upper cutting edge 144 that acts as an axial extension of the cutting edge 134 .

However, since both cutting edges 134 and 144 are inclined toward each other, the intersection point 1 where the respective cutting edges intersect
They intersect at 38, and each cutting edge acts as a means to flow the insulation 128 toward the point of separation 138.

Cutting blades 134 and 144 first cut through dressing 128;
If the dressing is made of a soft, resilient material such as rubber, the shedding action between the two will prevent the dressing from flowing away from the cutting edge.

Presumably, this is because the use of the single blade B is pressed against the surface of the flexible, flexible jacket 128, as best illustrated in FIG.

It has been found that if the dressing 128 is made of a rubbery composition, it will tend to flow to the side of the blade against which it is pressed in the manner shown in FIG.

As the coating 128 flows and wraps around the blade, resistance is created by the coating adhering to both sides of the blade, which results in a frictional and drag force that resists the cutting action.

However, with the apparatus of the present invention for cutting and stripping such coating material 128, the tendency of the coating material to flow or otherwise tighten around the blade is due to the inherent nature of the coating material 128 being utilized to produce advantageous red fruit. can overcome the resistance of

For example, in FIG. 7, the dressing material resists the cutting action at the tip A of blade B, and blade B has blades 134 and 144 tilted in the same way, and the dressing material 128 is not cut cleanly. When pushed down or pushed up, it is torn by the resistance of the large force exerted on the blade B to tear through the sheathing 128.

By intersecting the two cutting edges 116 and 118 in the device according to the invention, they intersect at the leading edge of the stretching of the dressing, thereby taking advantage of the tension or stretching of its jacket.

This is best shown in Figure 8, where cutting edges 116 and 1
18 between the cutting blades 134 and 144.

The flexibility of the stretching dressing is exploited by directing the dressing towards the tip of the intersection point 138.

Due to the tension generated in the soft coating at the tip of the intersection 138, little force is required to cleanly and smoothly peel off the coating at the intersection.

Therefore, by directing the flexible dressing toward the intersection or by taking advantage of the flexibility of the taut dressing, the stripping action performed at the tip of the intersection will be quick, smooth, and clean without being harsh. Ru.

This clean separation is facilitated by the action of cutting blades 134 and 144 that direct the flow of dressing 128 to the tips of the intersection points.

For the embodiment shown in FIGS. 9-14, by using identical numbers in the 200 range, the knife 11 of the previous embodiment is
This will be explained in relation to 0.

The last two digits are the same as those used to describe the corresponding parts defined by similar numbers and the knife 110 of the embodiment.

The exemplary cutting tool 210 employs a pair of intersecting cutting edges generally integrated by 216 and 218. The cutting edge 216 is mounted in a fixed position on the tool as described in commonly assigned U.S. Pat. No. 3,398,610. cutlery 2
10 is formed in a portion of the main body 214 having a fixing hole 212.

In the specification of the said US patent, the knife 210 is formed in two parts, the second scissor member 246 and the pivot 24.
8, which is pivotally attached to the main body 214.

Adjustment screw 250 is secured to a tool that limits rotation of member 246 relative to body 214 as shown diagrammatically in FIG.

The upward movement of the member acting on the cable is therefore set by adjusting the screw 250.

The first cutting edge 216 includes a rake face 222 terminating in a flat blade 220 .

The rake face 222, as in the previous embodiment,
Since the insulating coating material of the cable is cut by the flat blade 220, the cut material is lifted upward along the rake surface 222 and separated from the cable. .

A perpendicular line arranged with respect to the flat blade 220 is the axial movement surface 23
6 constitutes an axial cutting edge 234 terminating in 6.

Unlike the previous embodiments, the cutting edges and continuous surfaces 234 and 236 are each formed separately on a portion of the first cutting edge 216.

Since the cutting blade 234 is used for the flat blade 220, when the blade starts to come into contact with the sheathing material 228 of the cable 224, the cutting blade 23
4 was found to cut the insulation material first.

The cutting edge 234 and its continuous surface 236 are arranged parallel to a plane perpendicular to the axis of the cable 224.

Cutting edge 234 mates with axial cutting edge 244 where surface 236 ends.

Since the cutting edge 244 is inclined downwardly through the axis of the cable with respect to the horizontal plane, the cutting edge 244 crosses the intersection point 238.
moves together with the cutting edge 218 to cut the sheathing material 228 into the cable 224.
Completely peel away from the rest of the insulation sheathing.

With the cutter 210 fixed to the cutting tool with the aforementioned device,
The cutting depth of the flat blade 220 is set in the tool.

As the tool approaches the cable at an axially oblique angle, the cutting edge 234 cuts into the cladding along the orbit as indicated by the dashed line in FIG.

At the same time, the flat blade 220 cuts the insulation coating to a depth set in the tool.

During rotation of the tool around the cable, the cutting edge 210 is lifted at the rake face and along said helical trajectory with the cutting sheathing being stripped axially from the rest of the cable sheathing acting on the face 236. Sent.

However, the final peeling of the sheathing occurs toward the intersection of the sleeve sheathing 228.
is made at the intersection 238 between the cutting edges 216 and 218 by the cutting edge 244 which directs the cutting edge.

The flow of the coating in the peeling direction is facilitated by the rotational action of a rotary blade 252 rotatably limited by a screw 250 set in scissoring relationship with the cutting blade 244 at the intersection 238.

The cladding 228 is completely removed from the remainder of the cladding of the cable as it is guided and oriented toward the intersection point 238 to complete the helical axial rotation of the tool and a circular rotation about the cable is made along line 240. It is peeled off.

The rotary blade 252 is attached to the support pin 2 which is installed in the member 246 by an adjustment screw 258 as shown in FIG.
It consists of a cutting blade fixed to 56 and 254 which also serves as a bearing.

The rotating blade surface is toothed or serrated to prevent twisting and to rotate more reliably over the dressing.

This embodiment of the knife 210 is not limited to use for stripping cable jackets with shields and insulation coatings.

In this embodiment, a part of the cutting sheath includes a
There is a tendency to rake the cable irregularly, thereby rendering the cutting edge a frayed edge that substantially affects the conductivity of the cable.

However, during the cutting process described above, the broad surface of the rotary blade 252 is in constant contact and accommodates its natural tendency to lift up, bringing that surface into rotational engagement with the outer surface of the jacket-protecting sheath 228.

If the rotary blade 252 is provided with a knobby or serrated surface, it will more reliably rotate or press onto the gripping or dressing material to prevent curling.

The tangential pressure cooperates with cutting edge 244 to
It is provided to the rotary blade 252 in order to lift or round the surface of the covering material 228 which causes a cutting action.

The result is a clean and smooth shear and cut, demonstrating that the resulting stripped cable does not deform either the outer insulation sheath or the underlying metal shield.

This is important because it does not degrade the functionality of the insulation sheathing, such as substantially affecting or changing the electrical conductivity of the cable, as with conventional cutting equipment.

More importantly, it prevents the ends of the sheathing 228 remaining on the cable 224 from becoming loose.

A rotary blade 252 with a flat surface and a cutting blade 2 cooperating with the rotary blade 252
The tangential rotational and shearing effects that occur between the two and 44 eliminate any possible deleterious elements.

It will be understood that those skilled in the art can make various changes to the details of each of the above embodiments of the invention without departing from the spirit of the invention.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the completed end of the cable for explaining the present invention, Fig. 2 is a perspective view showing another embodiment of the cutting blade, Fig. 3 is an enlarged perspective view of the cutting edge, and Fig. 4 is the same. A top view, FIG. 5 is a side front view, FIG. 6 is an end view, FIG. 7 is an illustrative diagram using a conventional single blade, and FIG. 8 is a line 12-1 in FIG. 2.
Illustrative explanatory diagram using the present invention developed in accordance with Section 2, No. 9
10 is a top view of FIG. 9, FIG. 11 is a side front view, FIG. 12 is an end view of FIG. 11, and FIG. 13 is a still perspective view of another embodiment. No. 9 seen from the other side
The front view of the cutter in the figure, Figure 14 is line 11-18 in Figure 10.
Figure 15 is a cross-sectional view of the end of the cable using the cutters shown in Figures 9-14. The cutting edge of
...134,234, third cutting blade ...1
44,252, cable...24, core wire...
...26, Insulating material...28, Shield...
...30, Covering material...32.

Claims (1)

[Claims] 1. First and second cutting blades that are located in a plane that is substantially orthogonal to each other and are arranged at a predetermined distance from the conductive cable, excluding the axis as inclined cutting blades with respect to the axis of the conductive cable. the first and second cutting blades being opposed to the conductive cable in a generally helical path, one of the first or second cutting blades being configured to rotate about the conductive cable; A cutting force is applied in a direction substantially perpendicular to the axis of the cable and away from the axis of the cable, and the other of the first or second cutting blade is configured to scoop up the coating material scraped off from the conductive cable, Along with this, a third cutting blade that cooperates with the one of the first or second cutting blades is substantially orthogonal to the axis of the conductive cable and applies a cutting force in a direction from the outer peripheral surface of the cable toward the axis. A cutting device for conductive cable covering material, characterized by being equipped with a blade.