JP3036732B2 - Wire stripping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire stripping apparatus for stripping an insulating coating of a wire having a waterproof plug inserted therein.

[0002]

2. Description of the Related Art FIGS. 5A to 5C show a conventional wire stripping means. First, as shown in FIG. 5A, the insulating coating 3a at the end of the electric wire 3 is cut by a pair of cutters 61, and the cutter 61 is moved in the direction of the electric wire as it is to remove the insulating coating 3a along the core wire 3b. Next, as shown in FIG. 5B, a waterproof plug 2 made of rubber is inserted from the end of the core wire 3b. Waterproof stopper 2
Is visually positioned with the insulating coating 3a slightly protruding from the tip 2 'as shown in FIG. 5 (c). Electric wire 3 with waterproof plug
Is sent to the next terminal crimping step.

[0003]

However, in the conventional electric wire stripping means, when the waterproof plug 2 is inserted as shown in FIG. 5B, the core wire 3b is easily frayed and the insertion workability is reduced. At the same time, there is a problem that the core wire 3b is wound into the waterproof plug 2 to generate a defective product. FIG.
As shown in (c), since the position of the waterproof plug 2 is visually determined, there is a problem that the positional accuracy of the waterproof plug 2 is poor.

[0004] In view of the above, it is an object of the present invention to provide an electric wire stripping means that can easily and reliably position a waterproof plug on an electric wire and that does not cause the core wire to fray.

[0005]

In order to achieve the above object, the present invention provides a guide member having a receiving groove for a waterproof plug inserted into an electric wire, and a pair of skins arranged in contact with the guide member. A stripping cutter, a pair of cutting cutters protruding in the wire diameter direction from the stripping cutter, and separated from the stripping cutter by a wire stripping length, a block for fixing each cutter, and the block in the wire diameter direction. And a drive means for moving the wire in the longitudinal direction of the wire.

[0006]

The length of the wire protruding from the waterproof plug should be longer than the distance between the peeling cutter and the cutting cutter. Then, the waterproof plug is engaged with the receiving groove of the guide member. The tip of the electric wire projects forward of the receiving groove. The stripping cutter moves in the closing direction along the guide member to cut the insulating coating.
At the same time, the cutting cutter cuts off the leading end of the wire.
At this time, the distance from the waterproof plug to the end of the electric wire, that is, the position of the waterproof plug is determined. Next, the insulation coating is removed from the core wire by the movement of the peeling cutter in the longitudinal direction of the electric wire.

[0007]

FIG. 1 shows an embodiment of an electric wire stripping apparatus according to the present invention. The device 1 includes a pair of electric wire clamps 4, 4, a guide member 5 having a U-shaped receiving groove 9 for locking a rubber waterproof plug 2 previously inserted into the electric wire 3,
A pair of peeling cutters 6 and 6 which are in contact with the guide member 5 and open and close in the radial direction of the electric wire, and a pair of cutting cutters 7 and 6 which are formed to be longer than the peeling cutter 6 and open and close integrally with the peeling cutter 6; 7 and a drive cylinder 10 for integrally moving the peeling cutter 6 and the cutting cutter 7 in the longitudinal direction of the electric wire.

The pair of electric wire clamps 4 and 4 are connected to a rack 11
And a pinion 12 driven by a horizontal cylinder (not shown). The guide member 5 is located behind the wire clamp 4. The guide member 5 is composed of a vertical plate portion 14 having a receiving groove 9 for the reduced diameter portion 2 ′ at the distal end of the waterproof plug 2, and a horizontal plate portion 15 fixed to the frame 13 with bolts 17.

The receiving groove 9 has a receiving surface with respect to the outer peripheral surface of the reduced diameter portion 2a of the waterproof plug 2. The length of the receiving groove 9, that is, the plate thickness T of the vertical plate portion 14 is larger than the length of the reduced diameter portion 2a. Is also set long. That is, when the waterproof plug 2 is set on the guide member 5, the distal end of the reduced diameter portion 2 a does not project outside the guide member 5. The receiving groove 9 and the center of the pair of wire clamps 4, 4 are located on a straight line.

The back surface 14a of the vertical plate portion 14 of the guide member 5
The pair of peeling cutters 6 and 6 are located along. The peeling cutter 6 almost slides on the vertical plate portion 14 and cuts the insulating coating 3 a of the electric wire 3. Therefore, the difference between the length of the receiving groove 9 and the length of the reduced diameter portion 2a is equal to the length of protrusion of the insulating coating 3a from the waterproof plug 2 after peeling.

Behind the peeling cutter 6, a cutting cutter 7 is provided.
Is located. The cutters 6 and 7 are fixed to the front and rear ends of the spacer block 8 with bolts or the like.
Together, the cutter unit 18 is constituted. Each of the cutters 6 and 7 has a V-shaped cutting edge 6a and 7a, respectively. In this example, the cutting edges 6a of the pair of peeling cutters 6 are in the same direction.
The cutting edges 7a of the cutting cutter 7 are formed back to back. The entire length (projection length from the block 8) of the cutting cutter 7 is set to be longer than the entire length (projection length) of the peeling cutter 6 by at least the radius of the core wire.

Each of the pair of cutter units 18 is fixed to a slide block 19. The pair of slide blocks 19, 19 are respectively penetrated by a guide bar 20 in the wire longitudinal direction and a guide bar 21 in the wire orthogonal direction,
It can move back and forth and left and right. The slide block 1
The drive cylinder 9 is connected to an advance / retreat drive cylinder 10 and a drive cylinder for opening and closing movement via a rack and pinion (not shown). In addition, a slide 22 for discharging electric wire cutting debris is provided below the cutter unit 18. Each drive means of the wire clamp 4 and the cutter unit 18 is continuously operated by pressing the start button 23.

FIGS. 2 (a) to 2 (e) show the operation of the above apparatus. First, as shown in FIG. 2 (a), the waterproof plug 2 is inserted into the distal end of the electric wire 3. Here, the protruding length L of the electric wire 3 from the waterproof plug 2 is determined by the length of the cutter unit 18, that is, the peeling cutter 6.
If only leave longer than the distance L ₁ between the cutting cutter 7 and the positioning accuracy is not any need.

Next, as shown in FIG. 2B, the reduced diameter portion 2a of the waterproof plug 2 is engaged with the receiving groove 9 of the guide member 5, and the large diameter portion 2b of the waterproof plug 2 is fitted on the front surface 14b of the guide member 5. Abut the front end. The pair of cutter units 18 and 18 are on standby in a state where they are opened right and left. Then, by pressing the start button 23, a pair of cutter units 18 as shown in FIG.
Moves in the closing direction, the longer cutting cutter 7 cuts off the distal end portion 3 ′ of the electric wire 3, and at the same time, the shorter peeling cutter 6 cuts the insulating coating 3 a along the guide member 5.

Next, as shown in FIG.
The core wire 3b moves in a state in which the insulating coating 3a is held between the cutting cutter 7 and the peeling cutter 6 integrally with each other.
Is extracted along. Then, the peeling is completed as shown in FIG. Projection length L ₂ of the electrical wires from the waterproof plug 2 is 2
In the state of (d), it is determined by the thickness T of the guide member 5. The extra end 3 ′ of the electric wire 3 and the insulating coating 3a are
2 to the outside of the apparatus.

FIGS. 3 and 4 show modifications of the cutter unit. In the structure of FIG. 3, a cutting unit 26 is detachably provided on a peeling unit 25. The cutting unit 26 is housed in a concave portion 28 adjacent to the cutter fixing block 27 of the peeling unit 25 and is fixed with a bolt 29. The bolt 29 is inserted into the slot 31 of the cutter fixing block 30 of the cutting unit 26, and the cutting unit 2
6 can be adjusted on the peeling unit 25 in the wire longitudinal direction.

Each of the fixing blocks 27 and 30 has guide grooves 34 and 35 for a peeling cutter 32 and a cutting cutter 33, and the cutters 32 and 33 are fixed by inserting bolts 38 and 39 into long holes 36 and 37 of a base. The length of protrusion can be adjusted in the radial direction of the electric wire. The peeling unit 25 is fixed to the same slide block (see 19 in FIG. 1) by bolts 40.

In the structure shown in FIG. 4, the peeling unit 41 and the cutting unit 42 are independently fixed to the slide blocks.
5 and 46 are fixed so that the protruding length can be adjusted in the radial direction of the electric wire by engaging the elongated holes 47 and 48 with the bolts 49 and 50. A tool insertion hole 51 for the fixing bolt 50 of the cutting cutter 46 is formed in the peeling cutter 45 located on the electric wire clamp 4 ′ side, and a tool insertion hole 52 for each cutter fixing bolt 49, 50 is formed in the electric wire clamp 4 ′. Are formed.

The protrusion length of the cutting cutter 46 can be adjusted without removing the peeling unit 41. The unit 44 has an elongated hole 54 for a fixing bolt 53 to the slide block, and can be adjusted in the longitudinal direction of the electric wire. The unit 42 can finely adjust the inclination of the cutter 46 by using the play of the fixing bolt 53.

[0020]

As described above, according to the present invention, since the skin is peeled off after the waterproof plug is inserted into the electric wire, the core wire is not frayed or entangled as in the prior art. In addition, since the distal end of the electric wire is cut by the cutting cutter in a state where the waterproof plug is locked to the guide member, the length of the wire protruding from the waterproof plug, that is, the positioning of the waterproof plug is automatically and accurately performed. In addition, the work of positioning the waterproof plug becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an electric wire stripping apparatus according to the present invention.

FIGS. 2A and 2B are plan views showing the operation, wherein FIG. 2A shows a state in which a waterproof plug is inserted into an electric wire, FIG.
(c) is the state where the cutter unit has been moved in the wire diameter direction,
(d) shows a state where the wire has been moved in the longitudinal direction of the wire, and (e) shows a state where the peeling has been completed.

FIG. 3 is an exploded perspective view showing a first modification of the cutter unit.

FIG. 4 is an exploded perspective view showing a second modification of the cutter unit.

FIGS. 5A to 5C are plan views showing a conventional example.

[Explanation of symbols]

 2 Waterproof stopper 5 Guide member 6 Peeling cutter 7 Cutting cutter 8 Spacer block 9 Receiving groove 10 Drive cylinder 18 Cutter unit 21 Guide bar 27, 30, 43, 44 Fixing block

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 1/12 H02G 1/14

Claims (2)

(57) [Claims] 1. A guide member having a receiving groove for a waterproof plug inserted into an electric wire, a pair of peeling cutters arranged in contact with the guide member, and projecting in a wire radial direction from the peeling cutter, And a pair of cutting cutters separated from the stripping cutter by a wire stripping length, a block for fixing each cutter, and driving means for moving the block in the wire radial direction and the wire longitudinal direction. Characteristic wire stripping device. 2. An electric wire stripping apparatus according to claim 1, wherein said stripping cutter and said cutting cutter are fixed to both sides of said block to form one cutter unit.