JPS6120820Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a sheathing cutting and stripping blade used in a wire stripper that cuts a sheathed wire, and cuts and strips the sheathing.

Conventionally, wire strippers have, for example,
A coating cutting and stripping blade 1 as shown in FIG. 3 was used. That is, the coating cutting and stripping blade 1 consists of two blade bodies 2 and 2' having the same structure and arranged opposite to each other. More specifically, the blade bodies 2 and 2' have thin flat surfaces 3 and 3' cut on one side of the same side, and the lower and upper parts of the flat surfaces 3 and 3' respectively protrude to the opposite side. to form corner parts 4 and 4',
When the double blade bodies 2, 2' are closed, each corner 4, 4' is guided along the flat surfaces 3', 3 of the other blade body.

Further, the blade bodies 2 and 2' have a truncated conical portion at the tip from the other side surface side at the center of the opposing tip portion, and a semicircular recessed portion having a diameter approximately equal to that of the wire rod W is cut into the covering insertion portions 5 and 5. ', and semicircular cutting edges 6, 6' having a diameter equal to the diameter of the core wire _W1 of the wire W are formed between the flat surfaces 3, 3'.

The coating cutting and stripping blade 1 having the above-mentioned structure has two core wire cutting blades (not shown) arranged oppositely.
Each pair is arranged in parallel and facing each other. At this time, both blade bodies 2 and 2' of the coating cutting and stripping blade 1 have flat surfaces 3 and 2'.
3' is arranged on the side opposite to the core wire cutting blade.

In use, the wire W fed by a wire feeding means (not shown) is cut into the core by the core cutting blade, and the coating is cut by the coating cutting and stripping blade 1 on both sides of the cutting position (first step). 3
figure). Furthermore, due to the pulling action of the stripping clamp 7 that grips the remaining wire W toward the side opposite to the stripping blade 1 (in the direction of the arrow in FIG. 3), the coating waste W ₂ at the end of the wire is removed from the inserted portions 5 and 5'. It can be peeled off with the ends fitted together.

However, since the coating cut side of W ₂ from the coating is in contact with the conical surfaces of the cutting edges 6 and 6' when making the coating cut, the end of the coating scrap W ₂ is pressed from the outside by the conical surface and the core wire W ₁ is pushed towards. Therefore, if the core wire W is a thin wire and the thickness of the coating is thin, coating scum will be generated during the above-mentioned tensile action.
While W ₂ is firmly attached to core wire W ₁ , insert the cutting edge 6, 6'
Inconveniences such as passing through the area and not being peeled off may occur.

The present invention provides an improved coating cutting and stripping blade for the purpose of eliminating the aforementioned coating peeling defects.

The embodiments shown in FIGS. 4 to 7 will be described below.

FIG. 4 is a schematic diagram of the vicinity of the cutting blade group 11 of the wire stripper 10 employing the coating cutting and stripping blade of the present invention. Reference numerals 12 and 12' designate a pair of cutter holders in the front and rear, which are arranged so as to be able to reciprocate in opposite directions, and a set of two core wire cutting blades 13 are mounted in opposing positions in the center of the opposing surfaces. A set of two coating cutting and stripping blades 1 are arranged in parallel and facing each other on the left and right sides of the
4 and 14, and then each stripping blade 14 and 14.
On the side opposite to the core wire cutting blade 13, stripping clamps 15 and 15' which can be opened and closed and can be moved left and right are arranged.

5 and 6 show details of the coating cutting and stripping blade 14. The coating cutting and stripping blade 14 consists of two blade bodies 16 having exactly the same structure. - They can move together with 12' in a direction perpendicular to the wire rod feeding axis L along which the target wire rod W extends, so as to approach and move away from each other. Each of the blades 16 has a right-angled surface 17 that is perpendicular to the wire feeding axis L, a surface 18 that is inclined at an acute angle to the right-angled surface 17, and a circular groove 1 that is cut on the inclined surface.
9 and a semicircular cutting edge part 20 having a diameter slightly larger than the diameter of the core wire _W1 , which is formed on the opposite inclined surface side of the cutting edge part 20 and extends parallel to the wire feeding axis L with an appropriate length to the diameter of the wire rod W. It consists of a semicircular cover insertion part 21 of approximately equal diameter.

The coating cutting and stripping blades 14 are attached to the cutter holders 12 and 12' with the inclined surfaces 18 of both blade bodies 16 facing away from the core wire cutting blade 13.

Next, the effect will be explained.

Cutting blade group 11 and stripping clamps 15 and 15'
In the open state, a predetermined amount of wire W is fed along the wire feed axis L by a wire feed means (not shown). Next, the stripping clamps 15 and 15' close and grip the wire W, and the cutter holder 1
The cutting blade group 11 is closed by the opposing approaching movements of the blades 2 and 12'. As a result, the core wire cutting blade 13 cuts the wire W into a predetermined size, and the coating cutting and stripping blade 14 cuts the coating on both sides of the cutting portion (FIGS. 4 and 7).

At this time, as shown in FIG. 7, the cut end of _W2 from the cut cover is held in the cover insertion part 21, the slope of the cutting edge part 20 is pressed against the covered end surface of the remaining wire W, and the cutting edge 20 is very close to the outer periphery of the core wire _W1 .

Then, by pulling and moving the stripping clamps 15 and 15' to the side opposite to the core wire cutting blade 13, the remaining wire W remains in the cutting blade group while leaving the coating waste _W2 between the core wire cutting blade 13 and the coating cutting stripping blade 14. A core wire exposed portion is formed at the end apart from 11. When the core wire is drawn out, that is, the coating scrap W ₂ is peeled off, the end face of the coating scrap W ₂ is received by the right-angled surface 17, so that the core wire W ₁ is reliably supported even if the coating thickness is thin without compressing the core wire W 1. ₁ is more easily peeled off.

In the above-mentioned embodiment, the inclined surface 18 was formed only at the center, and thick parallel sections were left on both sides to serve as reinforcement, but depending on the overall thickness, the inclined surface 18 may be completely inclined. One of the thick parallel parts may be extended into an angular shape with an appropriate thickness, and the other may be formed into a notch shape, so that they engage with each other when they approach each other and serve as a guide. Moreover, although the above-mentioned embodiment has been shown for cutting one wire, it is of course possible to cut two or three wires, and a guide member for guiding the wire W to the center may be integrally formed.

As detailed above, when using the sheathing cutting and stripping blade of the present invention, the end of the sheathing scrap is held at right angles to the wire rod in the sheathing insertion part on the back of the blade edge, so it can be held securely compared to the conventional method. Since no compressive clamping force is generated on the core wire by the conical surface, the coating can be removed extremely reliably and easily even from thin wires with thin coatings without causing peeling defects.

[Brief description of the drawings]

Figure 1 is a layout diagram of an example of a conventional coating cutting and stripping blade, Figure 2 is a perspective view of one blade body in the blade in Figure 1, and Figure 3 shows the coating cutting state in the blade in Figure 1. Figures 4 to 7 show one embodiment of the present invention, and Figure 4 is a plan view of the vicinity of the cutting blade group of a wire stripper employing the coating cutting and stripping blade of the present invention. The figure is an enlarged side view taken along the line V-V in FIG. 4, FIG. 6 is a perspective view of one blade of the coating cutting and stripping blade, and FIG. 7 is a cross-sectional view showing the state of the coating cut by the coating cutting and stripping blade. It is. In the figure, 10 is a wire stripper, 11 is a group of cutting blades, 1 is a core wire cutting blade, 14 is a coating cutting and stripping blade, 15 and 15' are stripping clamps, 16 is a blade body,
20 is a semicircular cutting edge portion, 21 is a covering insertion portion, and W is a wire rod.

Claims (1)

[Scope of utility model registration request] Purpose Consists of a pair of opposing blades 16 that can move toward and away from each other in a direction perpendicular to the wire rod feeding axis L, and each of the blades 16 forms a right angle to the wire rod feeding axis L. A semicircular cutting edge with a diameter slightly larger than the diameter of the core wire W1 formed by a right-angled surface 17, an inclined surface 18 inclined at an acute angle with respect to the right-angled surface ₁₇ , and an arcuate groove 19 cut on the inclined surface 18. part 20, and a semicircular covering insertion part 21 formed on the side opposite to the inclined surface 18 of the semicircular cutting edge part 20, extending an appropriate length parallel to the wire rod feeding axis L, and having a diameter approximately equal to the diameter of the wire rod W. A coating cutting and stripping blade for a wire stripper, characterized in that it is constructed of: