JPH01164209A - Device for removing covering of wire - Google Patents

Abstract

PURPOSE:To achieve stable strip operation, by stripping a wire through a rotary grinding wheel. CONSTITUTION:When a drive frame is driven in the direction B, a drive gear 15 secured to the inner face of the drive frame is rotated clockwise with respect to an inner tubular base 1. Consequently, a driven gear 22 starts reverse rotation and causes following rotation of a rolling arm 23a. A wire W is held by a grinding wheel 27a supported by the rolling arm 23a and the grinding wheel 27a slides on the outer circumference of the wire W. Since the tubular base 1 rotates continuously in the direction A, the wire W is abraded by the rotating grinding wheel 27a over the entire circumference thus removing insulation coating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electric wire coating stripping device for removing the insulation coating of electric wires such as coil windings.

[Background of the invention]

A coil installed in a DC brushless motor or the like is formed by winding a thin electric wire whose outer circumferential surface is coated with an insulating material such as polyurethane or enamel. In this coil, the insulating coating on both ends of the wire is peeled off to expose the core wire, and the exposed ends are soldered to a printed circuit board or the like.

In a conventional method for stripping the insulation coating of an electric wire, a cutter is used, and the insulation coating is peeled off from the end of the electric wire using the blade of the cutter. In addition, an automated device for stripping the insulation coating from the end of a coil wire was developed, for example, in Japanese Patent Publication No. 62-3412.
Although it is disclosed in Japanese Patent No. 3, in the apparatus disclosed in this publication as well, the insulation coating is removed using a cutter.

(Problems to be Solved by the Invention) In the method for stripping the insulation coating of electric wires using the above-mentioned cutter,
The cutting process is basically removing the insulation coating using a blade, and the wear of the cutter will affect the service life. In order to extend the life of the cutter, it is good to reduce the amount of stripping per unit time, but this increases the processing time to complete the stripping of a certain amount of wire, which poses a problem in terms of cost. The reality is that cost is prioritized at the expense of cutter life.

Also, in the past, one cutter was applied to the wire from one side to strip it! ! Due to the processing, twisting force is applied to the wire. Therefore, the electric wire is easily damaged, and the electric wire may be cut, especially when attempting to peel off a thin wire having a diameter of about 0.2 mm or less. The zarani cutter has a self-generating action similar to that of a whetstone (a whetstone is made up of many cutting edges, and when the sharpness of the actual blade made of thin grains that is currently being cut becomes dull, the blade will fall off due to the grinding resistance. There is a problem in that the new blade starts cutting), and when it becomes dull, it has to be replaced.

The present invention solves the above-mentioned conventional problems, and allows the insulation coating to be stripped from even very thin wires without cutting them. Moreover, the coating stripping operation for a larger number of wires can be repeated than before. The present invention provides an apparatus for removing coatings from electric wires.

[Specific means for solving the problem] The present invention comprises a plurality of driven gears that are supported on a base across a portion through which electric wires are inserted, and a gear that meshes with each driven gear and revolves around the driven gears. The idle gear is supported so that it can
It consists of a grindstone that rotates with the idle gear, and a drive gear that meshes with each of the driven gears and is rotationally driven relative to the base.

[For production]

In the device according to the present invention, when the driven gear rotates in one rotational direction due to the relative rotation between the base and the driving gear, the grinding wheel moves away from the wire together with the idle gear, and when the driven gear rotates in the other rotational direction, the grinding wheel moves away from the wire together with the idle gear. rotates in the direction that touches the outer circumference of the wire. The insulation coating of the electric wire is then peeled off by the rotation of the grindstone.

(Embodiments of the invention) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing a wire coating stripping device according to the present invention, FIG. 2 is a front view thereof, and FIGS. 3A and 3B are operation explanatory diagrams.

In FIG. 1, reference numeral 1 denotes a cylindrical base, and a cylindrical drive frame 2 is provided overlappingly on the outer periphery of the base. The cylindrical base 1 is rotatably supported by a drive frame 2 by a bearing 3, and the drive frame 2 is rotatably supported by a chassis 5 by a bearing 4. The cylindrical base 1 and the cylindrical drive frame 2, which have a double structure as described above, are supported with respect to the chassis 5 so that they can each rotate independently. A ring-shaped gear 7 is provided on the outer periphery of the cylindrical base 1 located inside at the upper end position shown in FIG.
is fixed. Gear 8 supported by chassis 5
meshes with the ring-shaped gear 7. The power of the motor is transmitted from the gear 8 to the ring gear 7, and the cylindrical base 1 is driven to rotate at a low speed. A ring-shaped gear 9 is also fixed to the outer periphery of the drive frame 2 located on the outer periphery. Gear 11 supported by chassis 5
is meshed with this ring-shaped gear 9, and the power of the motor is transmitted from the gear 11 to the ring-shaped gear 9, and the drive frame 2 is rotationally driven. The direction of rotation of the drive frame 2 is the same as the direction of rotation of the cylindrical base 1, but the drive frame 2 is driven to rotate at a faster rotational speed than the cylindrical base 1. .

A drive gear 15 is mounted on the inner peripheral surface of the drive frame 2 located on the outside.
is fixed. This drive gear 15 rotates together with the drive frame 2. This drive gear 15 is an internal gear that is ring-shaped and has teeth on its inner circumference.

As shown in FIG. 2, the center portion of the cylindrical base 1 serves as an insertion portion for the electric wire W. As shown in FIG. Further, the base 1 is provided with a pair of shafts 21 located at positions sandwiching the insertion portion of the electric wire W. For convenience of illustration, Figure 1 shows a pair of shafts 2.
Only one of 1 is shown. As shown in FIG. 1, the shaft 21 is attached to pass through the cylindrical shaft 1, and its central portion is fixed to the support portion 1a of the cylindrical base 1. A driven gear 22 is rotatably supported at the center of the shaft 21 fixed within the cylindrical base 1 by a bearing (not shown). This driven gear 22 meshes with the drive gear (internal gear) 15 fixed to the inner periphery of the drive frame 2. When the drive frame 2 rotates relative to the cylindrical base 1, the driven gear 22 is rotationally driven by the drive gear 15. Two swing arms 23a and 23b are rotatably supported on one shaft 21 by bearings (in FIG. 2, one swing arm 23a and 23b is
Bearing 24 is shown held inside 2). The swing arm 23a has a rotating shaft 25a.
is rotatably supported by a bearing, and a rotating shaft 25b is rotatably supported by a bearing on the other swing arm 23b. An idle gear 26a and a roller-shaped grindstone 27a are fixed to both ends of one rotating shaft 25a. Further, an idle gear 26b and a roller-shaped grindstone 27b are fixed to both ends of the other rotating shaft 25b. The two idle gears 26a and 26b are both meshed with the driven gear 22.

A constant rotational load is applied between the shaft 21 and the two swing arms 23a and 23b by a leaf spring or the like, and when the driven gear 22 rotates, the swing arms 23a and 23b follow this rotation. They are designed to rotate in the same direction. Two sets of the above-mentioned mechanism consisting of the shaft 21, driven gear 22, swing arms 23a and 23b, idle gears 26a and 26b, and grindstones 27a and 27b are provided, as shown in the front view of FIG. To,
Two sets of grindstones 27a are opposed to each other with the insertion portion of the electric wire W interposed therebetween. That is, in this device, two sets of grindstones 27a are arranged to sandwich the electric wire W on the lower side of the drawing in FIG. 1 (the side appearing in the front view of FIG.
In the front view of the figure, two sets of grindstones 27b sandwiching the electric wire W are located in the front view (back side of the paper), and the electric wire W inserted into the cylindrical base 1 is placed at two points, the grindstones 27a and 27b.
The coating stripping operation by 7b and 27b is now performed.

As shown in FIG. 2, the cylindrical base 1 is provided with a stopper 31 and an adjustment stopper 32.

The stopper 32 restricts the rotation of each swing arm 23a in the counterclockwise direction. Further, the adjustment stopper 32 regulates the amount of clockwise rotation of each swing arm 23a. In other words, by adjusting the amount of protrusion of the adjustment stopper 32, it is possible to adjust the opposing distance between the two sets of grindstones 27a rotated in the direction to sandwich the electric wire. This adjustment is performed in response to, for example, a change in diameter due to surface wear of the grindstones 27a, 27b. Note that this adjustment stopper 32 is not necessarily necessary for the operation of stripping the coating of the electric wire W, and the adjustment stopper 32 is not necessary when the mutual pressure between the two sets of grindstones 23a is small.

Next, the operation will be explained.

In this device, the power of the motor is transmitted from the gear 8 to the ring gear 7, and the cylindrical head 1 located inside is moved at low speed in the direction A shown in FIGS. 2, 3A, and 3B. It is constantly driven in rotation. Outer drive frame 2 and drive gear (internal gear) 1 fixed to it
5 is stopped, as shown in FIG. 3A, the driven gear 22 is driven in the α direction by the stopped driving gear 15 due to the rotation of the cylindrical base 1 in six directions. Idle gears 26a, 26 meshing with the driven gear 22
b will rotate in the b direction, but the swing arm 23a
and 23b follow the rotation of the driven gear 22 and rotate in the α direction, so that the idle gears 26a, 26b and the grinding wheel 2
7a and 27b are moved away from the center of the cylindrical base 1. Swing arms 23a and 23b at this time
The rotation in the α direction is regulated by a stopper 31 shown in FIG.

When the electric wire is in the state shown in FIG. 3A, it is attached to the cylindrical base 1.
is supplied to the center of the When the part of the electric wire W from which the insulation coating is to be removed moves to a position between the grinding wheels 27a and 27a and 27b and 27b, the power of the motor is transmitted from the gear 11 to the ring gear 9, and the drive frame 2 is driven in the β direction. be done. At this time, the rotation direction of the drive frame 2 is the rotation direction of the cylindrical base 1.
The drive frame 2 is rotated in the same direction as the cylindrical base 1.
It is rotated at a faster speed than the Therefore, the drive gear (internal gear) 15 fixed to the inner surface of the drive frame 2 is rotating clockwise relative to the cylindrical base 1. This relative movement causes the driven gear 2
2 starts to reversely rotate in the β direction as shown in FIG. 3B, and each swing arm 23a, 23b follows this and rotates in the β direction.

The electric wire W is then sandwiched between the grindstones 27a and 27b supported by the swing arms 23a and 23b. Driven gear 2
2 rotates the idle gears 26a, 26b in the β direction, so that the grindstones 27a, 27b, which rotate together with the idle gears 26a, 26b, rotate to slide on the outer periphery of the electric wire W. Moreover, since the cylindrical base 1 continues to rotate in the direction A, the entire circumference of the electric wire W is rubbed by the two sets of rotating grindstones 27a and 27b, and the insulation coating is removed. After the insulation coating is removed, the drive frame 2
Also, if the rotation of the drive gear 15 in the β direction is stopped,
Due to the rotation of the constantly rotating cylindrical base 1, the grindstones 27a and 27b are separated from the electric wire W again as shown in FIG. 3A.

The above-mentioned device removes the insulation coating from two locations on the electric wire W at once. This device is placed, for example, in a wire supply section upstream of a coil winding device. And two sets of whetstones 27a and 2
The end of the wire from which the insulation coating has been removed by 7a becomes the winding end of the coil, and the end of the wire from which the insulation coating has been removed by the grindstones 27b and 27b becomes the winding start end of the coil.

In the illustrated embodiment, by rotating the cylindrical base 1 and the drive frame 2 (drive gear 15) in the same direction with a speed difference, the drive gear 15 can be rotated relative to the cylindrical base 1. Although the cylindrical base 1 is moved, it is also possible to keep the cylindrical base 1 stopped and rotate only the drive gear 15 to remove the covering of the electric wire W. At this time, the electric wire W is rotated in order to remove the coating from the entire outer circumference of the electric wire W.

〔Effect of the invention〕

As described above, according to the present invention, since the insulating coating of the electric wire is stripped using a rotating grindstone, a more stable stripping operation can be performed compared to the conventional stripping method using a cutter. Furthermore, since the wire is processed while being held between both sides by a plurality of grindstones, no twisting force is applied to the wire, making it less likely to be damaged. Therefore, for example, 0.15 mm
It is possible to remove the coating from extremely thin wires without cutting them. In addition, in the present invention, the coating is removed using a grindstone, but since the abrasive grains on the surface of a grindstone self-generate compared to a cutter, unlike conventional cutters, there is a lifespan problem due to blade wear. It is possible to repeat the peeling operation about 300,000 to 500,000 times without replacing the grindstone.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of a wire coating stripping device, FIG. 2 is a front view of FIG. 1, and FIGS. 3A and 3B are drive systems showing the operation. FIG. 1... Cylindrical base, 2... Drive frame, 3.4...
Bearing, 5... Chassis, 7... Ring-shaped gear fixed to the cylindrical base, 9... Ring-shaped gear fixed to the drive frame, 15... Drive gear (internal gear) , 22...driven gear, 23a, 23b.
... Swing arm, 26a, 26b... Idle gear,
27a, 27b...Whetstone, W...Electric wire. Applicant Alps Electric Co., Ltd.

Claims (1)

[Claims] A plurality of driven gears are supported by the base with the part through which the electric wire is inserted, an idle gear that meshes with each of the driven gears and is supported so that it can orbit around the driven gears, and an idle gear that rotates with the idle gears. A wire coating stripping device comprising a movable grindstone and a drive gear that meshes with each of the driven gears and is rotationally driven relative to the base.