JPH091401A - Wire coating separation device - Google Patents

Abstract

PURPOSE: To prevent the dispersion of a separated coating piece in the front surface due to a rotating cutter, easily separate a coating having a given length dimension, and ensure safety at the time of work, thereby improving workability, in a wire coating separation device wherein the end of a wire is inserted into the rotation cutter, retained on the tip of a rotation shaft via a collet, to separate the coating of the wire. CONSTITUTION: A separated coating piece, caused on a rotation cutter 11 part, is sucked on the rear side to be discharged, by forming a through hole 17 on a rotation shaft 9 to arrange a nozzle pipe 20 in the rear part of the shaft 9 to blow out a high speed air flow from a blowout hole 24 tilted rearward into the pipe 20. This high speed air flow can be effectively obtained by supplying compressed air to the air inlet 22 of a retaining ring 19 sheathing the pipe 20 to narrow a path area by the narrow diameter blowout hole 24. Also, a wire stroke adjustment mechanism is provided which is composed of a stroke shaft being stroke-adjustable along the rotation shaft 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for peeling a surface coating of a wire end such as an electric wire.

[0002]

2. Description of the Related Art The surface of an electric wire is coated with enamel for insulation. Therefore, at the time of connection, it is necessary to peel off the enamel film. As such a peeling device, the one shown in FIG. 3 is usually used. That is, in this peeling device B, the rotary cutter 43 is fitted inside the tip of the collet body 42 screwed to the motor shaft 41 of the motor 40, and the collet cap 44 is screwed onto the outer periphery of the tip of the collet body 42. is there. Rotary cutter 4
3 is an electric wire c to be peeled by providing a slit in the tip portion in an orthogonal shape.
Is formed so that the inner corner formed by the slits constitutes the cutting edge 43a, and the rotating cutter 43 is held and fixed to the collet body 42 by how the collet cap 44 is tightened. In addition, the cutting edge distance of the rotary cutter 43, that is, the cutting line diameter can be adjusted. In this state, the motor 40 is operated to rotate the rotary cutter 43, the operator holds the wire to be peeled c by hand, and inserts its end into the center hole of the rotary cutter 43, so that the wire diameter can be adjusted according to the wire diameter. The enamel film can be peeled off.

[0003]

However, in the above peeling device B, when the coating is peeled off, the peeled coating piece scatters on the front surface of the rotary cutter 43, so that an operator who inserts or removes the electric wire to be peeled off. There is a problem that the surroundings become stray, workers need to wear protective equipment, and it is difficult to collect the peeled pieces, which deteriorates the work environment and further hinders workability. It was Furthermore, since the operator grips the wire to be peeled by hand and pushes it directly into the rotary cutter, the hand accidentally touches the cutter that is rotating at high speed, resulting in unexpected injury. There is a problem with the workability, and therefore, it requires careful work, the peeled dimensions are likely to be uneven, and the workability is also problematic.

In view of the above situation, the present invention enables the stripped film pieces to be collected during the stripping operation of the wire coating without scattering around the front face of the rotary cutter and floating around the operator. In addition, it is intended to improve the working environment and improve the safety and workability of the work by enabling the worker to peel off the film to a certain length without touching the rotary cutter. Is.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a wire for exfoliating a wire by inserting an end of the wire into a rotary cutter held by a collet at the tip of a rotary shaft. In the film stripping device, a through hole is provided in the rotary shaft, a nozzle tube communicating with the through hole is held at a rear portion of the rotary shaft, and an outer periphery of the nozzle tube is rearward with respect to an axial direction of the nozzle tube. A plurality of small-diameter jet holes forming an acute angle on the side, and compressed air from an external compressed air source is passed through the jet holes into the nozzle tube through valve means for opening and closing the air circuit. By supplying, a high-speed exhaust flow is generated in the nozzle tube, and the negative pressure induced in the through hole sucks the peeling film piece generated by the rotary cutter and discharges it behind the nozzle tube. A wire film peeling device provided with a peeling film piece suction mechanism, and an air supply hole is provided in a ring body attached to the outer periphery of the nozzle tube, and compressed air from the external compressed air source is supplied through the air supply hole. It is supplied to the ejection holes of the nozzle tube and is ejected into the nozzle tube as a high-speed air flow, and the cross-sectional area of the air supply holes is sufficiently larger than the total cross-sectional area of the ejection holes. The wire coating stripping device provided with a mechanism is further provided with a stroke shaft which is held by a front bracket and a rear bracket attached to the base in a state of being urged forward by a spring along the rotary shaft. A push plate is fixed to the front end of the shaft to face the front of the rotary cutter, and a front stopper is attached to the stroke shaft between the front bracket and the push plate. The rear stopper is attached to the crawler shaft at the rear of the rear bracket so that the position of the rear stopper can be adjusted, and the forward stroke of the push plate is adjusted depending on the mounting position of the rear stopper to attach the end of the wire to the push plate. A wire film peeling device provided with a wire stroke adjusting mechanism that can be inserted into the rotary cutter with a predetermined slot talk by advancing together with it, and further, with a pointer plate attached to the rear end of the stroke shaft and the base. A wire coating stripping device provided with a wire stroke adjusting mechanism having a scale plate corresponding to the pointer plate is proposed.

[0006]

When the rotating cutter is rotated by a motor or the like, the wire is inserted into the rotating cutter to remove the film, and the valve mechanism is opened to supply compressed air from the compressed air source into the nozzle pipe at a high speed. Negative pressure is generated in the front part of the nozzle tube, and the peeling film piece generated by the rotary cutter is sucked through the through hole of the rotary shaft and discharged to the rear of the nozzle tube, so the peeling film piece scatters on the front surface of the rotary cutter. Without doing so, and because the worker's safety can be achieved, the work becomes easier and the workability improves.

Further, in the case where the air is ejected from the small-diameter ejection hole via the large-diameter air supply hole of the ring body attached to the outer periphery of the nozzle tube, the passage cross-sectional area is narrowed in the ejection passage. Therefore, the high-speed exhaust flow can be easily obtained without particularly considering the performance of the compressed air source.

Further, in the case where the wire stroke adjusting mechanism is provided, the operator inserts the pushing plate into the rotary cutter while pushing the pushing plate against the biasing force of the spring with the hand holding the end of the wire. When the stroke reaches a predetermined stroke, the forward movement of the front stopper is restricted by the abutment of the front stopper on the front bracket, so that the wire film can be peeled off for a predetermined length and the worker is prevented from coming into contact with the rotary cutter. Therefore, the safety of the worker is improved, and the workability is improved because the work is facilitated.

Further, in the case where the pointer plate is provided at the rear end of the stroke shaft and the scale plate is arranged on the base, the mounting position of the rear stopper is set while observing the scale of the pointer according to the peeling length of the wire. It is possible to improve the certainty and convenience of the work.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wire coating stripping apparatus of the present invention will be described below with reference to the drawings showing the embodiments. 1 is a side sectional view of a main part of a wire coating stripping apparatus of the present invention, and FIG. 2 is a side sectional view of a wire stroke adjusting mechanism in the wire coating stripping apparatus of FIG. As shown in FIG. 1, the wire coating stripping apparatus A of the present invention includes a wire stripping mechanism 2 mounted on a base 1 and a stripping coating disposed on the rear portion (left side in the drawing) of the wire stripping mechanism 2. One-sided suction mechanism 3 and frame 4 on the base 1
A motor 5 attached to the wire peeling mechanism 2 for transmitting rotation and a wire stroke adjusting mechanism 6 as shown in FIG.

That is, in the wire stripping mechanism 2, the tip of a rotary shaft 9 rotatably inserted and held through a bearing 8 in a substantially cylindrical casing 7 fixed horizontally on the base 1. The portion is formed to have a small diameter, and the collet body 10 is screwed, the rotary cutter 11 is housed inside the collet body 10, and the collet cap 12 is attached to the tip of the collet body 12 like the conventional example described above. The rotary cutter 11 is screwed, and the rotary cutter 11 is fixed by tightening the collet cap 12, and the interval between the blade edges 11a can be adjusted.

The rear portion of the rotary shaft 9 is projected to the outside of the casing 7, and the pulley 13 is fixed by screwing, so that the motor 5
The belt 16 is stretched between the pulley 15 </ b> A and the motor shaft 14. Two pulleys 15A and 15B are attached to the motor shaft 14 shown in the figure, but one of them is attached according to the frequency of the supplied power so that the rotary cutter 11 can be operated at a constant rotational speed. There is something. Further, the rotary shaft 9 is provided with a through hole 17 at the center in the axial direction including the small diameter portion of the tip portion.

In the wire stripping mechanism 2, the rotary shaft 9 is rotated by the rotation of the motor 5, and accordingly the rotary cutter 11 is rotated, and the end of the stripped wire a for stripping the coating on the blade edge 11a at the center thereof. By inserting, the coating of the wire to be peeled a is peeled off by the blade edge 11a of the rotary cutter 11.

The stripping film piece suction mechanism 3 arranged at the rear of the wire stripping mechanism 2 has a cylindrical holding ring 19 fixed to the front surface (right side in the figure) of the bracket 18 after being fixed to the base 1 by screwing. The holding ring 19 covers the rear end of the rotary shaft 9 and the front part of the nozzle tube 20 is internally fixed by screwing. The nozzle tube 20 has a front end surface in the vicinity of the rear end surface of the rotary shaft 9 and a slightly larger front end, but has a discharge hole 21 having a diameter substantially the same as that of the through hole 17 of the rotary shaft 9 as an axial center. Have, through hole 1
7 and the discharge hole 21 are in communication with each other.

A relatively large diameter air supply hole 22 is formed in the peripheral wall of the retaining ring 19, and an annular groove 23 is formed in the front portion of the nozzle tube 20.
The air supply hole 22 of the retaining ring 19 faces the annular groove 23 of the nozzle tube 20 when the valve is fixed to the rear portion of the rotary shaft 9. In the annular groove 23, a plurality of small-diameter ejection holes 24 are formed at equal intervals at an appropriate acute angle (30 ° in the figure) toward the rear axial center. As a result, the compressed air supplied to the air supply hole 22 of the retaining ring 19 has the diameter of the air supply passage narrowed by the ejection holes 24 of the nozzle tube 20, and becomes an accelerated air flow, as indicated by the arrow. It will be ejected into the tube 20.

Since a negative pressure region b is generated at the back of this jet of air, the peeling film piece generated at the rotary cutter 11 portion passes through the through hole 17 of the rotary shaft 9 and the discharge hole of the nozzle tube 20. 21 will be sucked and discharged rearward. In this embodiment, the diameter of the air supply hole 22 of the retaining ring 19 is 4.2 mm, and the ejection hole 2 having a diameter of 0.5 mm is used.
By providing 4 at 6 places and setting the area ratio to about 10 to 1, the air flow from the normal compressor is made to be a jet air flow at a speed close to a substantially sonic speed, and a sufficient suction effect of the peeling film piece is obtained. . This high velocity air stream may supply what is produced on the compressed air source side.

A coupler (not shown) is attached to the air supply hole 22 of the holding ring 19, and is further connected to a compressor (not shown) through a solenoid valve 25 provided as a circuit opening / closing valve means by a pressure resistant air hose. Solenoid valve 2
Reference numeral 5 denotes a foot switch or a hand switch (not shown) that allows the operator to operate the circuit at any timing during wire stripping work to open the circuit and supply compressed air from the compressor to the air supply hole 22 of the retaining ring 19 .

Further, as shown in FIG. 2, the wire coating stripping apparatus A is provided with a pair of wire stroke adjusting mechanisms 6 for determining the insertion stroke of the wire to be stripped a on the left and right sides of the wire stripping mechanism 2. ing. The wire stroke adjusting mechanism 6 includes a front bracket 26 that is integrally mounted on the base 1 with the casing 7 and a rear bracket 18 that holds the nozzle tube 20, and a front bearing 27 and a rear bearing 28.
A pair of stroke shafts 29 are slidably held through the pair of stroke shafts 29.
A push plate 30 is fixed to the front end of the so as to connect them together. The push plate 30 is located in front of the rotary cutter 11 in the central portion, and the central portion corresponding to the rotary cutter 11 is cut out.

A front stopper 31 is fixed to the front of each stroke shaft 29 by screwing, and a rear stopper 32 is provided at the rear of the stroke shaft 29 and is temporarily fixed by screw tightening so that the position can be adjusted. . A compression spring 34 is interposed between the front bracket 26 and the rear bracket 18 and a stopper 33 fixed to the stroke shaft 29 and the rear bearing 28 to urge the stroke shaft 29 forward. That is, the stroke shaft 29 is restricted from moving forward by the rear stopper 32. A pointer plate 35 is fixed to the rear end of the stroke shaft 29 on one side, and a scale plate 36 indicating the position of the pointer 35a attached to the pointer plate 35 is arranged on the base 1.

After the dimension S ₁ between the push plate 30 and the rotary cutter 11 which sets the maximum stroke of the stroke shaft 29 and the dimension S ₂ between the front stopper 31 and the front bearing 27 are matched, the stroke shaft 29 is pulled back to adjust the position of the rear stopper 32, and the dimension S ₂ between the front stopper 31 and the front bearing 27 is changed to match the end insertion depth of the stripped wire a, that is, the stripped length dimension. Therefore, with the tip of the wire to be peeled a close to the rotary cutter 11, the wire to be peeled a is advanced together with the push plate 30 to a position where it is stopped and inserted into the rotary cutter 11 to peel the end portion to a predetermined size. You can do it.

In this embodiment, as described above, the scale plate 36 showing the maximum stroke and the minimum stroke is arranged on the base 1, and the pointers 35a of the pointer plate 35 are made to correspond to each other. When the stroke of the stroke shaft 29 is set according to the peeling dimension, the pointer 35a is aligned with the scale plate 36 and the rear stopper 32 is temporarily fixed to the stroke shaft 29 at the contact position with the rear bracket 18, so that the stroke is covered with one touch. The insertion depth of the peeling wire a can be set.

Since the wire stripping apparatus A of the present invention is constructed in this way, the rotary cutter 11 is fixed by loosening the collet cap 12 to accommodate the rotary cutter 11 in the collet body 10 and then tightening the collet cap 12. At the same time, the distance between the cutting edges 11a is set to a predetermined dimension according to the diameter of the wire to be peeled a to be peeled. Then, the rear stopper 32 is shifted according to the peeling length dimension, that is, the insertion depth of the wire a to be peeled into the rotary cutter 11, and is fixed to the stroke shaft 29. The compressor 5 is operated and the motor 5 is operated to rotationally drive the rotary shaft 9 of the wire stripping mechanism 2 to rotate the rotary cutter 11.

The operator holds the wire to be peeled a in his hand, brings the end of the terminal close to the rotary cutter 11 over the notch of the push plate 30, and in this state, pushes the push plate 30 to cover the inside of the rotary cutter 11. The peeling wire a is inserted, and the film is separated by the rotary cutter 11. When it is inserted to the set insertion depth, the front stopper 31 comes into contact with the front bearing 27 and pushes the push plate 30.
Is stopped, the insertion wire is retracted together with the push plate 30 and pulled out from the rotary cutter 11.

When the wire to be peeled a is inserted, the switch is operated to operate the electromagnetic valve 25 to open the air circuit, whereby compressed air is supplied to the air supply hole 22 of the retaining ring 19 and passes through the ejection hole 24. Jetted into the nozzle pipe 20 at a high speed and discharged backward in the nozzle pipe 20. Along with this, a negative pressure region b is generated in the front portion of the discharge hole 21 in the nozzle pipe 20,
The peeling coating film pieces of the wire a to be peeled generated in the rotary cutter 11 portion are sucked toward the through hole 17 side of the rotary shaft 9 without being scattered forward, and eventually discharged backward by the nozzle tube 20. By connecting the rear portion of the nozzle tube 20 to an appropriate dust collecting device, it goes without saying that the peeled pieces can be collected without polluting the environment.

[0025]

As is apparent from the above description, according to the present invention, the following effects can be obtained. (1) A high-speed airflow that provides a through-hole in the rotary shaft that holds the rotary cutter and a nozzle tube that communicates with this through-hole, and sucks the peeling film pieces generated in the rotary cutter rearward into the nozzle tube. Since I tried to spout out,
Unlike the conventional case, when the wire film is peeled off, the peeled film piece does not scatter on the front surface of the rotary cutter and is not allowed to stray around the operator, and can be collected. Therefore, the work environment is improved and the workability is also improved.

(2) In the air supply passage, the cross-sectional area of the passage is narrowed so that the high-speed air flow is supplied into the nozzle pipe through the small-diameter jet holes, without requiring any special auxiliary equipment. In addition, it is possible to obtain a high-speed air flow for sucking the release coating piece.

(3) A stroke shaft is arranged along the rotary shaft, and a push plate is attached to the front end of the stroke shaft to regulate the movement stroke of the push plate and rotate the wire to be peeled forward together with the push plate. In the case where the cutter is inserted into the cutter, a peeling dimension of a predetermined length can always be secured without the need to perform the work carefully, and the operator's hand directly touches the rotary cutter. Since it does not occur, work safety is ensured and workability is improved.

(4) In the case where the stroke shaft is provided with a pointer and the scale plate for that purpose is arranged on the base, it is possible to set the moving stroke of the pushing plate surely and easily,
The convenience is improved and the workability is also improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main part of a wire coating stripping device of the present invention.

FIG. 2 is a side sectional view of a wire stroke adjusting mechanism in the wire coating stripping device of FIG.

FIG. 3 is a side sectional view of a main part of a conventional wire film peeling device.

[Explanation of symbols]

 A wire film peeling device a wire to be peeled b negative pressure region 1 base 2 wire peeling mechanism 3 peeling film piece suction mechanism 4 frame 5 motor 6 wire stroke adjusting mechanism 7 casing 9 rotating shaft 10 collet body 11 rotating cutter 12 collet cap 13 Pulley 16 Belt 17 Through hole 18 Rear bracket 19 Retaining ring 20 Nozzle tube 21 Discharge hole 22 Air supply hole 23 Annular groove 24 Jet hole 25 Solenoid valve 26 Front bracket 27 Front bearing 28 Rear bearing 29 Stroke shaft 30 Push plate 31 Front stopper 32 Rear Stopper 33 Stopper 34 Compression spring 35 Pointer plate 36 Scale plate

Claims (4)

[Claims] 1. A wire film stripping device for stripping a wire film by inserting a wire end into a rotary cutter held at the tip of a rotary shaft via a collet,
A through hole is provided in the rotary shaft, and a nozzle tube communicating with the through hole is held at the rear portion of the rotary shaft,
A plurality of small-diameter jet holes are formed on the outer circumference of the nozzle tube in the rear side with respect to the axial direction of the nozzle tube, and the compressed air is externally compressed through valve means for opening and closing an air circuit. By supplying compressed air from a source into the nozzle tube through the ejection hole, a high-speed exhaust flow is generated in the nozzle tube, and the negative pressure induced in the through hole causes the rotary cutter to generate it. A wire coating stripping device, which is provided with a stripping coating strip suction mechanism for sucking the stripping coating strip and discharging it behind the nozzle tube. 2. A ring body attached to the outer periphery of the nozzle tube is provided with an air supply hole, and compressed air from the external compressed air source is supplied to the ejection hole of the nozzle tube through the air supply hole to supply high-speed air. A peeling film piece suction mechanism is provided so as to be jetted into the nozzle tube as a flow and the cross-sectional area of the air supply hole is sufficiently larger than the total cross-sectional area of the jet hole. 1. The wire film peeling device according to 1. 3. A stroke shaft held by a front bracket and a rear bracket attached to the base in a state of being urged forward by a spring along the rotary shaft is provided, and a push plate is provided at a front end of the stroke shaft. It is fixed so that it faces the front of the rotary cutter, and a front stopper is attached to the stroke shaft between the front bracket and the pressing plate, and a rear stopper is attached to the stroke shaft at the rear of the rear bracket so that the stroke stopper can be adjusted in position. , A wire stroke adjusting mechanism that adjusts the forward stroke of the push plate according to the mounting position of the rear stopper and advances the end of the wire together with the push plate so that the wire stroke can be inserted into the rotary cutter with a predetermined stroke. The wire according to claim 1 or 2, wherein the wire is provided. Film peeling device. 4. A wire stroke adjusting mechanism in which a pointer plate is attached to the rear end of the stroke shaft and a scale plate corresponding to the pointer plate is provided on the base. Wire film peeling device.