JPH0529225U - Intermediate coating stripping machine for electric wires - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the quality and efficiency of stripping the intermediate coating of electric wires. [Structure] A circumferential cutting blade 5 having a concave semicircular cutting edge 2 of a knife edge having a diameter similar to the conductor diameter of an electric wire 7 is opposed to each other, and the pair of circumferential cutting blades 5 are connected to each other, and a concave semicircle is formed. A stripper blade 1 consisting of a linear cutting blade 6 having a straight edge 3 of a knife edge is formed on a straight line connecting the centers of the respective semi-circular bottoms of the blade edge 2 in a symmetrical arrangement facing the blade edge to form a main part, , A heater for heating the cutting edge of the stripper blade 1, and inside the main body frame 13,
A feature of the intermediate coating stripping machine is a structure provided with an operating mechanism for opening and closing the stripper blade 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric wire intermediate coating stripping machine used for exposing a conductor by stripping a coating on an intermediate portion of a coated electric wire.

[0002]

[Prior Art]

 The method of stripping the intermediate coating of an electric wire is to make two cuts in the circumferential direction at arbitrary intervals with the blade tip of an appropriate tool, and forcibly remove the intermediate coating between the cuts. The conductor is taken off to expose the conductor, or, as shown in Japanese Utility Model Publication No. 51-601, a peeling blade that has an H-shaped blade tip and is heated by a heater is used, and an electric wire is used for the peeling blade. There is a method of pressing and rolling to make two notches in the circumferential direction of the electric wire and making a notch in the longitudinal direction of the electric wire that connects the circumferential direction and stripping the coating on that part.

[0003]

[Problems to be solved by the device]

 Of the above-mentioned known intermediate coating stripping means, the former one is inefficient and is not suitable for mass production, and the coating cutting quality may be inferior because the cutting edge of the tool may be insufficient and the conductor may be damaged. Although the latter type using an H-shaped peeling blade has some mass productivity, it lacks incision and overcutting due to the peeling blade, which naturally causes damage to the conductor and insufficient incision. Since the shape of the coating stripping is unsightly due to the stripping of the coating, it requires considerable skill and processing time to press and roll the wire against the stripping blade, which lacks the workability of modern mass production. There is a defect. The present invention provides a coating stripping machine that solves the above-mentioned drawbacks of the prior art.

[0004]

[Means for Solving the Problems]

 The coating stripping machine of the present invention, which solves the above technical problems, is described as "a pair of circumferential cutting blades having a concave semicircular cutting edge of a knife edge having a diameter approximately equal to the conductor diameter of the coated electric wire are made to face each other at a required interval. , A straight cutting edge having a straight cutting edge that connects the pair of circumferential cutting edges and connects the center points of the respective semicircular bottoms of the pair of concave semicircular cutting edges with the straight edge of the knife edge The structure is characterized in that the stripper blades are combined symmetrically so as to face each other, a heater for heating the blade tip is provided on the stripper blade, and an operating mechanism for opening and closing the stripper blades in the symmetrical arrangement is further provided ".

In the configuration of the present invention described above, the diameter and shape of the concave semicircular cutting edge are set to be slightly different from the conductor diameter in consideration of the coating thickness of the coated electric wire, the deformation of the electric wire due to the cutting resistance, and the like. Or, it may be a near semicircle other than the geometrically exact half circle. The cutting edge of the diameter cutting blade that connects the concave semi-circular cutting edges does not always exactly match the line of the center point of the bottom of the concave semi-circular cutting edge due to consideration of cutting resistance and the like. A deviation may be given, and another concave semicircular cutting edge for stripping the end coating of the electric wire may be additionally provided in the middle of the straight cutting edge.

[0006]

[Action]

 The coating stripping machine of the present invention having the above-described configuration is constructed from a pair of circumferential cutting blades of the concave semicircular cutting edge and a straight cutting blade having a straight cutting edge on a line connecting the centers of the bottoms of the concave semicircular cutting edges. The stripper blades are combined symmetrically opposite to each other and have a heating means for the cutting edges and a vertical movement mechanism.Therefore, when the stripper blades are inserted at a predetermined position in the middle of the electric wire and the cutting edges are joined, they are heated. The blade edge of the knife edge bites into the wire coating very easily, and two points on the circumference of the wire and two points in the length direction of the wire connecting the two circumferences are cut up to the conductor surface. The coating on the part is extremely easy to peel off. Since the concave semi-circular cutting edge and straight cutting edge that form the cut have the above-mentioned shape requirements, there is no risk of reaching the conductor and the cutting is sufficient, so that damage to the conductor is prevented and coating stripping is performed. There are no tear marks and the shape is extremely beautiful. Further, the coating stripping machine of the present invention can be applied to the batch coating stripping processing of the wire end portion by utilizing the cutting blade.

[0007]

【Example】

 Hereinafter, a detailed description will be given based on examples. First, referring to FIG. 1 and FIG. 2 showing a first embodiment of the present invention, a stripper blade 1 which is a main part of the coating stripping machine is a pair of circumferential cutting blades having a concave semicircular cutting edge 2 of a knife edge. 5 are opposed to each other at an interval corresponding to the length of the intermediate coating stripping, and a straight cutting edge 6 having a straight edge 3 of a knife edge that connects the centers of the circumferential cutting edges 5 in the orthogonal direction is integrated. The straight cutting edge 3 of the linear cutting blade 6 is located exactly on the straight line connecting the center points of the semicircular bottoms of the concave semicircular cutting edges 2. The stripper blades 1 are paired in a symmetrical arrangement in which the blade edges face each other, and a heater 4 for heating the blade edges to a required temperature is internally provided in a key place.

The intermediate coating stripping machine 12 having the stripper blade 1 as a main part is shown in FIG. 2 and FIG. 3, and the stripper blade 1 B below the pair of opposed stripper blades 1 is attached to the bracket 9 of the main body frame 13. The stripper blade 1A on the upper side is attached and fixed to the tip of the movable arm 10 projecting from the main body frame 13, and when the stripper blade 1A1B is closed by the operation of the movable arm 10, a circular cut is made. The upper edge portion 8 of the blade 5 is joined and the blades face each other, and the joined concave semicircular cutting edge 2 has a diameter substantially the same as the conductor diameter of the electric wire 7, and when the stripper blade 1A1B is opened, the electric wire 7 Can be laid down by inserting it into the concave semicircular blade tip 2. The main body frame 13 has a built-in operating mechanism for the movable arm 10 and a temperature controller for the heater 4. The operation of the pedal 14 causes the stripper blade 1A1B to open and close, and the cutting edge of the stripper blade 1A1B is covered with a coating cut. The temperature is set and maintained at the appropriate temperature. Further, the intermediate coating stripping machine 12 is provided with a positioning stopper 15A for determining the coating stripping position of the electric wire inserted in the concave semicircular blade tip 2 as shown in FIG.

When the electric wire 7 is inserted into the stripper blade 1A1B of the coating stripping machine 12 having the above-mentioned configuration and the pedal 14 is operated, the stripper blade 1A1B is closed and the cutting edges are joined, and the heated cutting edges 2 and 3 are converted into electric wires. Two covering notches 17 at a predetermined interval on the circumference of the circle 7 and two covering notches 16 in the longitudinal direction connecting the notches 17 with straight lines are formed. The notches 16 and 17 cover the conductor 19 until they come into contact with each other. Since it is completely cut or reaches very close to the conductor 19, only by lightly pulling the cut coating 18 with a fingertip, the cut coating 18 is peeled off very easily and the conductor 19 is exposed. Then, the cut end 20 appearing on the electric wire 7 does not leave peeling debris or tear flaws, and the peeling dimension is accurate, and the high quality intermediate coating stripping without damage to the conductor can be efficiently performed.

Next, a stripper blade 1 according to another embodiment of the present invention will be described with reference to FIGS. That is, the stripper blade 1 shown in FIG. 4 has the same structure as that of the first embodiment, and the concave semicircular blade edge 2A of the knife edge is provided in the middle of the straight blade edge 3 of the linear cutting blade 6. Using the stripper blade 1 of FIG. 4 and positioning by the other positioning stopper 15B provided on the body frame 13 side as shown by the dotted line in FIG. When the stripper blade 1 is inserted into the circular blade tip 2A and the stripper blade 1 is joined thereto, a single circumferential cut is made at a predetermined position of the electric wire 7, and the covering of the end portion of the electric wire can be stripped off from the circular cut as a starting point. Therefore, the stripper blade 1 can be used for stripping the intermediate coating of the wire and stripping the coating of the wire end. In addition, when the intermediate coating is stripped by the stripper blade 1 of FIG. 4, an uncuttable portion is generated due to the presence of the concave semicircular blade tip 2A, but this uncut portion is in the middle of the cut by the straight blade tip 3 and is a perfect body. Since the amount is small, there are few practical disadvantages that hinder the peeling of the cut coating 18.

Next, the stripper blade 1 of FIG. 5 has a shape in which the straight blade edge 3 slightly protrudes from the center point 21 of the semicircular bottom of the concave semicircular blade edge 2. According to the one shown in FIG. 5, when the straight blade tip 3 is cut above and below the electric wire 7, the electric wire 7 is bulged and deformed in the lateral direction due to the cutting resistance, and the electric wire 7 is cut by the protruding amount. The cutting depth matches the circumferential cutting blade 5 that cuts by restraining the outer circumference (preventing bulging deformation), and the cut coating 18 becomes easier to peel off.

[0012]

[Effects of the Invention] As described above, the coating stripping machine in the middle of the wire of the present invention has the excellent performance that the stripping of the intermediate coating of high quality can be performed very efficiently without trouble, and It has a multi-functionality that can be applied to stripping the coating on the ends, and has the practical effect of improving the quality of stripping the wire and improving productivity.

[Brief description of drawings]

FIG. 1 is a perspective view showing a stripper blade and a processing procedure of an intermediate coating stripping machine according to an embodiment of the present invention.

FIG. 2 is a front view of an intermediate coating stripping machine according to an embodiment of the present invention.

FIG. 3 is a plan view of an essential part of FIG.

FIG. 4 is a perspective view of a stripper blade according to another embodiment of the present invention.

FIG. 5 is a front view of a stripper blade according to another embodiment of the present invention.

[Explanation of symbols]

 1 Stripper Blade 2 Recessed Semicircular Blade Edge 3 Straight Blade Edge 4 Heater 5 Circumferential Cutting Blade 6 Linear Cutting Blade 7 Electric Wire 8 Circumferential Cutting Blade Upper Edge 10 Movable Arm 12 Intermediate Coating Stripping Machine 13 Body Frame 16 Longitudinal Cutting 17 Circular notch 18 Notch coating 19 Conductor

Claims (4)

[Scope of utility model registration request] 1. A pair of circumferential cutting blades having a concave semicircular cutting edge of a knife edge having a diameter close to that of the conductor of the covered electric wire,
A straight cutting edge of a knife edge is formed on a straight line connecting the pair of circumferential cutting blades while facing each other at a required interval and connecting the center points of the respective semicircular bottoms of the pair of concave semicircular cutting edges. With a stripper blade consisting of a linear cutting blade having a symmetrically opposed blade edge, the stripper blade is provided with a heater for heating the blade edge,
An intermediate wire stripping machine characterized by a structure provided with an operating mechanism for opening and closing the stripper blades in the symmetrical arrangement. 2. The intermediate coating stripping machine for electric wires according to claim 1, comprising a stripper blade having a concave semicircular blade edge provided in the middle of the straight blade edge. 3. An electric wire intermediate coating stripping machine according to claim 1, wherein the straight cutting edge is a stripper blade slightly protruding from a straight line connecting the center points of the semicircular bottoms of the concave semicircular cutting edges. 4. An electric wire intermediate coating stripping machine according to claim 1, 2 or 3, wherein a positioning stopper for the electric wire is provided.