JP2005065372A - Apparatus for exfoliating insulating film of conductive wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for exfoliating inexpensively with a simple constitution which is short in an axial direction. <P>SOLUTION: The apparatus 1 for exfoliating the insulating film of a conductive wire W covered with the insulating film includes a nozzle block 4 having a nozzle 7 for guiding the conductive wire in the axial direction, weights 9, 10 which turn the conductive wire W as a center and which radially move by a centrifugal force in association with the turning, and a cutter 12 disposed at a position opposed to the weights with the conductive wire W therebetween and having a cutter edge capable of being brought into pressure contact with the conductive wire W directly near the nozzle 7. The nozzle block 4 is rotatable, and the weights are coupled to the cutter 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to an apparatus for removing an insulating film of a conductive wire.

  In order to electrically connect the conductive wire covered with the insulating film to the terminals and pads, it is necessary to peel off the insulating film only at the connection portion. Conventionally, the peeling method is roughly divided into three categories, and the first is to immerse the end of the conductive wire in a solder bath so as to solder and simultaneously melt the insulating film with the heat. The second is to immerse the conductive wire in a chemical solution such as acid or alkali to dissolve the insulating film. Thirdly, the insulating film is mechanically ground or cut with a blade.

Of these methods, the first method is limited to a material whose insulating film is melted at the melting point of solder, such as polyurethane. Therefore, the peeling method cannot be applied to a heat-resistant insulating film such as polyimide that has come to be used for conductive wires with the recent increase in use temperature. The second method requires a separate device for detoxifying used chemicals. The third method has no such problems and is widely used. In particular, in a device (Patent Document 1 and Patent Document 2) in which the blade rotates around the conductive wire and the blade tip presses against the conductive wire using the centrifugal force at the time of turning (Patent Document 1 and Patent Document 2), the contact pressure of the blade is that of the conductive wire. Since it is evenly applied to the periphery, there is little variation in peeling. Each of these apparatuses includes a nozzle that guides the conductive wire in the axial direction, and an axially long blade that is attached to the outside of the nozzle so as to be swingable toward the conductive wire. The blade tip is formed at the tip of the blade and a weight is attached to the rear end or the rear end is made heavy, and a centrifugal force acting to move the weight away from the conductive wire in the radial direction is applied to the principle. Is transmitted to the cutting edge.
JP-A-11-196513 JP 2002-101516 A

However, in the devices described in Patent Documents 1 and 2, since the cutter is long in the axial direction as described above, the entire device is also long in the axial direction. In addition, the lever mechanism is complicated. Further, since the fulcrum of swinging of the blade is located behind the nozzle, the blade edge must be pressed against the conductive wire at a position away from the nozzle, and the conductive wire easily escapes due to the contact pressure of the blade tip. Therefore, in order to prevent the conductive wire from escaping from the blade edge, it is necessary to dispose the same shape of the blade at three locations in the circumferential direction and press-contact uniformly from the three directions, which is also complicated and expensive.
Therefore, an object of the present invention is to provide an inexpensive peeling device with a short and simple configuration in the axial direction.

In order to solve the problem, the device of the first invention of the present invention is:
In an apparatus for peeling off an insulating film of a conductive wire covered with an insulating film,
A nozzle block having a nozzle for guiding the conductive wire in the axial direction;
A weight that swivels around a conductive wire and moves in the radial direction by the centrifugal force associated with swiveling;
It is located at a position facing the weight with the conductive wire in between, and the blade tip is provided with a cutter that can be brought into pressure contact with the conductive wire in the immediate vicinity of the nozzle by moving in the radial direction along with the weight.

  According to the device of the present invention, the weight is moved away from the conductive wire in the radial direction by the centrifugal force acting on the weight as it turns. At the same time, the cutter is moved along the same diameter line by the weight and is pressed against the conductive wire immediately after coming out of the nozzle. Since the moving direction of the cutter is the radial direction, it is possible to press the conductive wire in the immediate vicinity of the nozzle in this way. The cutter rotates with the weight during pressure welding. Thereby, the insulating film is peeled off.

It is preferable that the nozzle block is rotatable, and that the weight and the cutter are connected to each other because the weight and the cutter rotate with the rotation of the nozzle block and the cutter is reliably interlocked with the weight.
Furthermore, if the apparatus of the present invention is provided with a guide that is fixed to the nozzle block and guides the conductive wire that has passed in front of the blade edge in the same direction, the conductive wire can be used even if the contact pressure of the blade edge is large or the conductive wire is thin. Is preferably guided in the axial direction.
The same applies to a case where the conductive wire is fixed to the nozzle block so as to face the blade edge and receives pressure from the blade edge against the conductive wire and includes a backing for guiding the conductive wire in the axial direction.

In order to solve the above problem, the peeling device of the second invention of the present invention is:
In an apparatus for peeling off an insulating film of a conductive wire covered with an insulating film,
A rotatable nozzle block having a nozzle for guiding the conductive wire in the axial direction;
A weight that rotates together with the nozzle block and simultaneously rotates in a plane perpendicular to the conductive line with the eccentric position on the nozzle block as a fulcrum by centrifugal force accompanying rotation,
The cutter is provided with a cutter capable of being brought into pressure contact with the conductive wire in the immediate vicinity of the nozzle by turning around the eccentric position with the weight.
According to the device of the second invention, centrifugal force acts on the weight as the nozzle block rotates, and thereby the weight turns in a plane orthogonal to the conductive wire. The cutter is swung with the weight and presses against the conductive wire immediately after coming out of the nozzle. Since the cutter moves in a plane perpendicular to the conductive line, it is possible to press the conductive line in the immediate vicinity of the nozzle. The cutter rotates with the weight during pressure welding. Thereby, the insulating film is peeled off.

  In the apparatus according to the first aspect of the present invention, it is sufficient if the weight moves in the radial direction with the turning and the cutter moves in the radial direction along with the weight, so that the space occupied by the apparatus in the axial direction is small. Since the apparatus according to the second aspect of the present invention only needs to turn the weight and the cutter within the plane orthogonal to the conductive wire, the space occupied by the apparatus in the axial direction is small. Further, since the blade edge is pressed against the conductive wire in the immediate vicinity of the nozzle, the conductive wire is difficult to escape. Therefore, one cutter is sufficient and it is inexpensive.

  Hereinafter, the present invention will be specifically described based on embodiments.

FIG. 1 is a perspective view showing a peeling apparatus according to the first embodiment, and FIG. 2 is a partially broken front view of the apparatus.
The peeling apparatus 1 includes a plate-like bracket 2, a motor 3, and a nozzle block 4. The motor 3 is mounted on one main surface of the bracket 2 and its output shaft (not shown) penetrates the bracket 2 and protrudes from the other main surface. The nozzle block 4 includes a cylindrical lower block 4a shown in FIG. 2 and a rectangular parallelepiped upper block 4b connected thereto. The upper block 4b includes the lower block 4a in plan view, and is mounted on the same main surface as the motor 3 mounting surface of the bracket 2. The lower block 4a penetrates the bracket 2 and protrudes from the other main surface of the bracket 2, and is fixed to the bracket 2 so as to be rotatable via a bearing (not shown). A pulley 5 is attached to the lower block 4 a protruding from the bracket 2, and the output of the motor 3 is transmitted to the pulley 5 via an endless belt 6.

  In the nozzle block 4, a nozzle 7 having a circular cross section is provided on the center line of the lower block 4a from the upper block 4b to the lower block 4a, and a conductive line W covered with an insulating film is passed therethrough. The inner diameter of the nozzle 7 is large enough to pass the conductive wire W without receiving resistance over the entire length in the lower block 4a and the length of the lower half in the upper block 4b, and the upper in the upper block 4b. The length is about the same as the outer diameter of the conductive wire W over half the length. In the upper block 4b, as shown in FIG. 2, one connecting rod 8 is slidably penetrating through the eccentric position with respect to the nozzle 7 in the twisting direction. A weight 9 with a mass W1 is attached to one end of the connecting rod 8, and a weight 10 with a mass W2 is attached to the other end. These weights have a relationship of W1> W2. Since the weight 9, the connecting rod 8, and the weight 10 are considered as one body, the difference (W1-W2) is a substantial weight mass.

  The distance between the weight 9 and the weight 10 is sufficiently larger than the distance from one end face of the upper block 4b to the other end face, and the difference becomes play D. A hook 4c and a hook 9a are formed on the upper surface of the upper block 4b and the surface of the weight 9 facing the weight 10, respectively, and a coil spring 11 is attached to these hooks. The two hooks are provided so that the coil spring 11 can expand and contract in a direction parallel to the connecting rod 8 without interfering with the conductive wire W. The coil spring 11 exhibits an elastic restoring force in a direction that attracts the weight 9 to the upper block 4b. A stopper 4d is provided on the other side of the upper surface of the upper block 4b, that is, at a position substantially diagonal to the hook 4c.

A cutter 12 is fixed to the weight 10 so as to float with a slight gap from the upper surface of the upper block 4b. The cutter 12 has a rectangular parallelepiped shape that is long in a direction perpendicular to the nozzle, and is disposed on a diameter line passing through the nozzle 7 and in parallel with the connecting rod 8. One of the cutting edges shown in FIG. In each of FIGS. 3A to 3D, the upper stage shown in white is the plane of the cutter, the lower stage shown by hatching is the front, and (a) the blade tip is inclined in one direction with respect to the conductive wire W. (B) is composed of two surfaces intersecting the front end surface, (c) is a combination of flat surfaces in which the cutting edge has a twill shape, and (d) has an inclination direction orthogonal to each other. The cutting edge of the cutter 12 is separated from the conductive wire W when the motor 3 is stopped. This distance is fixed by an adjustment screw 13 embedded from the upper surface of the weight 10, but when the adjustment screw 13 is loosened, the cutter 12 can move in the longitudinal direction and can be changed.
Further, a bolt 10 a is attached to the weight 10 at a position diagonal to the hook 9 a in parallel with the cutter 12. The bolt 10a can be displaced with respect to the weight 10 by a screw motion. The front end surface of the bolt 10a faces the stopper 4d with a gap.

The procedure for peeling off the insulating film of the conductive wire W using the apparatus of this example is as follows.
The conductive wire W covered with the insulating film is passed through the nozzle 7. The distance d1 between the conductive wire W coming out of the nozzle 7 and the cutting edge of the cutter 12 and the distance d2 between the tip surface of the bolt 10a and the stopper 4d are set according to the material and diameter of the conductive wire W and the thickness of the insulating film, respectively. . d1 and d2 are both smaller than D, and d2-d1 is a cutting allowance. When the motor 3 is driven, the output is transmitted to rotate the nozzle block 4, and accordingly the weights 9 and 10 rotate around the conductive wire W. Centrifugal force acts on the substantial mass (W1-W2) of the weight 9 and the weight 10, and the weight 9 moves away from the conductive wire W against the restoring force of the coil spring 11 along with the weight 10 and the connecting rod 8. At the same time, the cutter 12 approaches the conductive wire W while turning, and the cutting edge comes into pressure contact with the conductive wire W. Since the cutter 12 is only slightly lifted from the upper surface of the upper block 4 b, the cutting edge is in contact with the conductive wire W in the immediate vicinity of the nozzle 7. Therefore, even if there is only one cutter 12, the conductive wire W is not pushed away by the cutter 12, and the cutting edge scrapes off the insulating film with an appropriate contact pressure.

  In the apparatus of this example, since the cutter 12 is displaced in the same direction as the weights 9 and 10, the structure is simple and maintenance is easy without requiring complicated parts such as a direction changing member. Further, since only one cutter 12 is sufficient, it is easy to adjust the machining allowance. As a result, the manufacturing cost is low. And since the axial direction length of the whole apparatus is short, it is easy to install in the workplace which cannot ensure the axial occupation space so much.

  FIG. 4 is a perspective view showing a peeling apparatus according to the second embodiment of the present invention. In this example, a guide 16 is added to the apparatus of the first embodiment. Since the other points are the same as those of the first embodiment, the same reference numerals are used for illustration, and the description is replaced. The guide 16 is fixed to the upper surface of the upper block 4b so as not to interfere with the trajectory of the cutter 12, and is formed in an inverted L shape having a small lower portion and a wide upper portion. And the through-hole is formed in the up-down direction in the width direction protrusion part in the upper part, and the conductive wire W which passed the front of the blade edge is guided in the same direction by passing the conductive wire W there. By providing the guide 16 in this way, the conductive wire W is reliably guided in the axial direction even if the contact pressure of the cutting edge of the cutter 12 is large or the conductive wire W is thin.

  FIG. 5 is a perspective view showing a peeling apparatus according to the third embodiment of the present invention. In this example, a backing 17 is added to the apparatus of the first embodiment. Since the other points are the same as those of the first embodiment, the same reference numerals are used for illustration, and the description is replaced. The backing 17 has a rectangular parallelepiped shape that is larger in width and height than the tip surface of the cutter 12 as well as the diameter of the conductive wire W, and is fixed to the upper block 4b so as to face the cutting edge with the conductive wire W therebetween. Has been. Then, two guide pins 18 and 18 are attached above the cutting edge on the surface facing the cutting edge, and the conductive wire W is passed between them, so that the conductive wire W that has passed in front of the cutting edge is the same. Guide in the direction. By providing the backing 17 in this way, the backing 17 receives the pressure of the cutting edge against the conductive wire W and guides the conductive wire W in the axial direction.

FIG. 6 is a perspective view showing a peeling apparatus according to a fourth embodiment of the present invention, and FIG. 7 is a partially broken front view of the apparatus. Also in this example, the peeling apparatus 100 includes a plate-like bracket 2 and a motor 3 that are the same shape and quality as those in the first embodiment. The nozzle block 14 is also composed of a cylindrical lower block (not shown) and a rectangular parallelepiped upper block connected to the same as in the first embodiment. However, there is no connecting rod 8 that penetrates the nozzle block 14. Hereinafter, differences from the first embodiment will be described.
A weight 19 is placed on the upper surface of the nozzle block 14. The weight 19 has a U-shape that surrounds the conductive wire W exiting the nozzle 7 as if the weight 9 and the weight 10 in the first embodiment are connected to each other by the connecting rod 8 at one end. Yes. And the one rotating shaft 18 penetrates the connection part, and the lower end of the rotating shaft 18 is rotatably embedded in the nozzle block 14 via a bearing not shown. The weight 19 has a large volume difference between one side and the other side with the rotary shaft 18 as a boundary, and a cutter 22 is attached to the smaller side.

A hook 14c and a hook 19a are formed on the upper surface of the upper block and the surface on the large volume side of the weight 19, respectively, and a coil spring 21 is attached to these hooks. The two hooks are provided so that the coil spring 21 does not interfere with the conductive wire W and expands and contracts at a position facing the connecting portion of the weight 19 with the conductive wire W in between. The coil spring 21 is not loaded when the system is stationary. A stopper 14d is provided at a position near the hook 14c on the upper surface of the upper block.
The cutting edge of the cutter 22 is separated from the conductive wire W when the motor 3 is stopped. This distance is fixed by an adjustment screw 23 embedded from the upper surface of the weight 19, but can be changed by loosening the adjustment screw 23. Further, a bolt 19b is attached to the weight 19 in parallel with the cutter 22 at a position facing the hook 19a. The bolt 19b can be displaced with respect to the weight 19 by screw movement. The front end surface of the bolt 19b faces the stopper 14d with a gap.

According to this apparatus 100, when the nozzle block 14 rotates, the weight 19 also rotates. The two rotate together at low speed due to friction between the two, but when the rotational speed increases, the centrifugal force acting on the weight 19 exceeds the frictional force. As a result, the weight 19 rotates against the restoring force of the coil spring 21 around the rotating shaft 18 at the eccentric position of the conductive wire W. The cutter 22 is brought into pressure contact with the conductive wire W immediately after exiting the nozzle with the weight 19. As a result, the insulating film is peeled off. Since the cutter 22 is only slightly lifted from the upper surface of the upper block, the cutting edge is in contact with the conductive wire W in the immediate vicinity of the nozzle. Therefore, the conductive wire W is not pushed away by the cutter 22, and the blade edge scrapes off the insulating film with an appropriate contact pressure.
In the apparatus of this example as well, it is easy to adjust the machining allowance because only one cutter 22 is sufficient. As a result, the manufacturing cost is low. And since the axial direction length of the whole apparatus is short, it is easy to install in the workplace which cannot ensure the axial occupation space so much.

FIG. 8 is a perspective view showing a peeling apparatus according to a fifth embodiment of the present invention, and FIG. 9 is a partially broken front view of the apparatus. Also in this example, the peeling apparatus 200 includes a plate-like bracket 2 and a motor 3 that are the same shape and quality as those in the first embodiment. Similarly to the first embodiment, the nozzle block 24 also includes a cylindrical lower block 24a and an upper block 24b connected thereto. However, dovetail grooves whose trapezoidal cut surfaces are formed on the upper surface of the upper block 24a in a plane perpendicular to the cutter 12 are slidably fitted therein. The connecting block 28 connects the weight 9 and the weight 10 in place of the connecting rod 8. A through hole 28a that is sufficiently larger than the diameter of the nozzle 7 is formed in the center of the connection block 28 in consideration of the stroke of the connection block 28, and the tip of the nozzle 7 of the upper block 24b faces the hole. In order to smoothly slide the connecting block 28 with respect to the upper block 24b, rolling elements such as balls and rollers may be interposed therebetween.

  FIG. 10 is a partially broken front view showing a peeling apparatus according to a sixth embodiment of the present invention. In each of the above embodiments, the nozzle has a monocoque structure in which the nozzle is integrated with the nozzle block. On the other hand, in this embodiment, the nozzle block 34 is composed of a block main body 35 composed of a cylindrical lower block 35a and an upper block 25b continuous therewith, and a nozzle tube 36 penetrating the block main body 35 in the axial direction. It is configured. As a result, the block body 35 is made of an inexpensive material that is easy to process, the nozzle tube 36 is made of a material with little friction with the conductive wire W, and the portion of the insulating film of the conductive wire W that should not be peeled off is the nozzle tube. Injury within 36 can be prevented.

It is a perspective view which shows the peeling apparatus of Example 1. FIG. It is a partially broken front view which shows the said peeling apparatus. (A)-(d) shows the cutter applicable to the said peeling apparatus, the upper stage is a top view in each part of (a)-(d), and a lower stage is a front view. It is a perspective view which shows the peeling apparatus of Example 2. FIG. It is a perspective view which shows the peeling apparatus of Example 3. FIG. It is a perspective view which shows the peeling apparatus of Example 4. FIG. It is a partially broken front view which shows the said peeling apparatus. It is a perspective view which shows the peeling apparatus of Example 5. FIG. It is a partially broken front view which shows the said peeling apparatus. It is a partially broken front view which shows the peeling apparatus of Example 6. FIG.

Explanation of symbols

1, 100 Peeling device 2 Bracket 3 Motor 4, 14 Nozzle block 7 Nozzle 8 Connecting rod 9, 10, 19 Weight 12 Cutter

Claims (6)

In an apparatus for peeling off an insulating film of a conductive wire covered with an insulating film,
A nozzle block having a nozzle for guiding the conductive wire in the axial direction;
A weight that swivels around a conductive wire and moves in the radial direction by the centrifugal force associated with swiveling;
An apparatus comprising: a cutter that is located at a position facing the weight with the conductive wire in between, and that moves in the radial direction along with the weight so that the blade edge can press-contact the conductive wire in the immediate vicinity of the nozzle.   The apparatus according to claim 1, wherein the nozzle block is rotatable, and the weight and the cutter are connected to each other.   Furthermore, the apparatus of Claim 1 or 2 provided with the guide fixed to a nozzle block and guiding the conductive wire which passed the front of the blade edge | tip in the same direction.   The apparatus according to claim 1, further comprising a backing that is fixed to the nozzle block so as to face the blade edge with the conductive wire interposed therebetween, receives pressure of the blade edge against the conductive wire, and guides the conductive wire in the axial direction. apparatus. In an apparatus for peeling off an insulating film of a conductive wire covered with an insulating film,
A rotatable nozzle block having a nozzle for guiding the conductive wire in the axial direction;
A weight that rotates together with the nozzle block and simultaneously rotates in a plane perpendicular to the conductive line with the eccentric position on the nozzle block as a fulcrum by centrifugal force accompanying rotation,
An apparatus comprising: a cutter that is capable of being brought into pressure contact with a conductive wire in the vicinity of a nozzle by turning around the eccentric position with a weight.   The apparatus according to claim 5, wherein the weight has a U shape surrounding the conductive wire, and the cutter is fixed to one side of the weight.

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