JPH0974725A - Taping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the inexpensive taping device having the simple structure, which can perform winding work under the condition, wherein the tension of an insulating tape is constant. SOLUTION: A ring-shaped sliding surface 11 is provided in the inside of a ring-shaped fixing frame 1. A sliding part 22, which is slid on the sliding surface 11, is provided on the side surface of a rotating ring 2. A rotating means rotates the rotating ring 2. A bobbin holder 41 is fixed to the inside of the rotating ring 2. A tape bobbin 4 is attached to the bobbin holder 41 so that the bobbin can be rotated. These parts are provided. Furthermore, a guide roller 5 is provided at a position, which is separated from a line connecting the tape bobbin 4 and the center of the rotating ring 2 in the vertical direction, and attached to a roller holder 51, which is fixed to the bobbin holder 41 so that the roller can be rotated through a rotary shaft. One end of a plate- shaped flat spiral spring is fixed to the roller holder 51, and the other end is fixed to a rotary shaft. The plate-shaped flat spiral spring is extending and shrinking in the parallel direction with a line connecting the center of the tape bobbin 4 and the center of the rotating ring 2 and moves the guide roller 5. These parts are also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a taping device for winding an insulating tape around the surface of an electric wire such as an armature coil or a rotor bar of a rotary electric machine, and more particularly, even if the relative position between the electric wire and the taping device changes. The present invention relates to a taping device that can automatically wind an insulating tape with a constant tension.

[0002]

2. Description of the Related Art Conventionally, when an insulating tape is wound around the surface of an electric wire such as a rotor bar or a tortoise shell coil used in a rotary electric machine, a bobbin wound with the insulating tape is rotated around a rotating ring that rotates around the electric wire. Like this,
One end of the insulating tape is fixed to the surface of the electric wire, and the rotating ring is moved along the longitudinal direction of the electric wire while rotating the bobbin together with the rotating ring. By the way, there is no problem when the cross section of the wire is circular or square or when the insulating tape is wrapped around the straight part of the wire, but when the wire is rectangular and the difference between the short side and the long side is large, or the coil end part and the straight part When winding on a curved part near the boundary with the insulation tape, the portion around which the insulation tape is wrapped greatly shifts from the center of the rotating ring, causing a large change in the tension of the insulation tape, causing slack in the insulation tape or a large tension. There was a problem that the width of the insulating tape was changed and the quality of the insulating layer was deteriorated due to the excessive tightening. To solve this problem, the rotating ring can be moved up and down, left and right, and the position of the rotating ring is controlled so that the part where the insulating tape is wrapped around the wire is always located at the center of the rotating ring. If the amount of positional deviation from the center of the curved part to the part where the insulating tape is wound on the curved part exceeds the position controllable range of the rotating ring, change the angle to hold the wire to reduce the apparent amount of positional deviation. Have been disclosed (for example, JP-A-3-22).
2657).

[0003]

However, in the above-mentioned prior art, a complicated moving mechanism for moving the rotating ring up and down, left and right and a movement control device therefor are required, and the rotating ring is detected by detecting the shape of the electric wire. There is a problem that a complicated control for moving is required and the apparatus is expensive. SUMMARY OF THE INVENTION It is an object of the present invention to provide a taping device which has a simple structure and can be wound with a constant tension of an insulating tape and which is inexpensive.

[0004]

In order to solve the above problems, the present invention provides a ring-shaped fixed frame provided with a ring-shaped sliding surface on the inside and a sliding surface provided on the side surface of the fixed frame. A rotating ring provided with a sliding portion for sliding, a rotating means for rotating the rotating ring, a bobbin retainer fixed inside the rotating ring, and a bobbin retainer rotatably attached. In a taping device provided with a tape bobbin, a roller retainer fixed to the bobbin retainer or the rotating ring, the roller retainer being provided at a position vertically separated from a line connecting the tape bobbin and the center of the rotating ring. A guide roller mounted so as to be rotatable via a rotation shaft, one end fixed to the roller holder and the other end fixed to the rotation shaft of the guide roller, and the center of the tape bobbin and the rotation reel. And stretch a line parallel to a direction connecting the center of the grayed is obtained a plate-shaped power spring to move the guide rollers.

[0005]

By the above means, the guide roller is provided between the bobbin wound with the insulating tape attached to the rotating ring and the electric wire arranged near the center of the rotating ring, and the guide roller is adapted to respond to the change in the tension of the insulating tape. Since it is moved by a plate-shaped spring spring whose length changes, the tension of the insulating tape is maintained substantially constant even if the position of winding the insulating tape of the wire is eccentric from the center of the rotating ring.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is an enlarged front view of a main part. In the figure, reference numeral 1 denotes a ring-shaped fixed frame, which is formed in a C-shape by providing a ring-shaped sliding surface 11 inside and a notch 12 in a part. Reference numeral 2 denotes a rotating ring, which is formed in a C shape with a notch portion 21 provided in a part thereof, and a sliding portion 22 which slides on the sliding surface 11 provided on the fixed frame 1 is provided on the side surface. . Timing gear teeth 23 are provided on the outer periphery of the rotary ring 2. 3 is a fixed frame 1
The timing gear 31 is rotatably supported by the timing gear 31 and the timing belt 31 is a tooth 23 provided on the outer circumference of the rotary ring 2.
And the timing gear 3 are meshed and wound. That is, when the timing gear 3 is rotated, the rotary ring 2 is rotated via the timing belt 31. It should be noted that the teeth 23 of the timing gear and the timing gear 3 are normally used gears, and two idle gears that are arranged directly or at intervals wider than the width of the notch 21 and mesh with a gear provided on the outer periphery of the rotary ring 2 are used. You may make it mesh via. Reference numeral 4 denotes a tape bobbin wound with an insulating tape T, which is rotatably attached to the bobbin holder 41, and the bobbin holder 41 is fixed inside the rotating ring 2. Reference numeral 5 denotes a guide roller, which is provided at a position vertically separated from a line connecting the tape bobbin 4 and the center of the rotating ring 2, and is provided with a roller holder 51 fixed to the bobbin holder 41 via a rotation shaft 52. It is mounted so that it can rotate. The roller holder 51 is provided with an elongated hole 53 extending in a direction parallel to a line connecting the center of the tape bobbin 4 and the center of the rotating ring 2, and supports the rotating shaft 52 so as to be movable. ing. Reference numeral 6 denotes a plate-shaped mainspring spring whose tension is almost constant with respect to elongation, and is arranged so as to expand and contract along the longitudinal direction of the elongated hole 53, the outer end is fixed to the roller holder 51, and the inner end is the guide roller 5. It is fixed to the rotary shaft 52.

When the insulating tape T is wound around the electric wire W, first, the timing belt 31 is removed so that the cutout portion 21 of the rotary ring 2 and the cutout portion 12 of the fixed frame 1 overlap each other, and the electric wire W is cut out. 12 and 21 are put into the rotating ring 2, positioned near the center of the rotating ring 2, and the timing belt 31 is wound around the timing gear 3 and the rotating ring 2. Next, the insulating tape T is pulled out from the tape bobbin 4 and wound around the guide roller 5 to be fixed to the electric wire W. In this state, when the rotation ring 2 is rotated by rotating the timing gear 3 by a drive motor (not shown), the tape bobbin 4, the bobbin holder 41, the guide roller 5, the roller holder 51, the plate-shaped spring spring 6, and the insulating tape. The T rotates around the electric wire W and is wound. When the electric wire W is eccentric from the center of the rotating ring 2 and the distance between the guide roller 5 and the electric wire W becomes large as shown by the alternate long and short dash line in FIG. The spring spring 6 momentarily extends to move the guide roller 5 in a direction in which the tension of the insulating tape T decreases,
The tension of the insulating tape T is reduced. When the distance between the guide roller 5 and the electric wire W becomes small, the insulating tape T
Tension decreases and tries to relax, but the plate-shaped spring spring 6
Momentarily contracts and moves the guide roller 5 in the direction in which the tension of the insulating tape T increases, increasing the tension of the insulating tape T and preventing loosening. In the above embodiment, the electric wire W is described as being arranged near the center of the rotary ring 2 through the notches 12 and 21 provided in the fixed frame 1 and the rotary ring 2, but a linear electric wire such as a rotor bar is described. When the insulating tape T is wound around W, the fixed frame 1 and the rotary ring 2 are not provided with cutout portions, and the electric wire W is inserted into the rotary ring 2 from the axial direction passing through the center of the rotary ring 2. Good. Further, in the above embodiment, the example in which the roller holder 51 is fixed to the bobbin holder 41 has been described, but the roller holder 51 may be directly fixed to the rotating ring 2.

[0008]

As described above, according to the present invention, the guide roller is provided between the bobbin wound with the insulating tape attached to the rotating ring and the electric wire arranged near the center of the rotating ring, and the guide roller is provided. Since the roller is moved by a plate-shaped spiral spring whose length changes according to the change in the tension of the insulating tape, the tension of the insulating tape can be changed even if the winding position of the wire is eccentric from the center of the rotating ring. Has an effect that it is possible to provide an inexpensive taping device having a simple structure, which is maintained substantially constant, has no looseness or tightening.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view showing a main part of an embodiment of the present invention.

[Explanation of symbols]

1: fixed frame, 11: sliding surface, 12, 21: notch,
2: rotating ring, 22: sliding part, 23: timing gear teeth, 3: timing gear, 31: timing belt,
4: tape bobbin, 41: bobbin retainer, 5: guide roller, 51: roller retainer, 52: rotating shaft, 53: elongated hole, 6: plate spring spring

Claims (2)

[Claims] 1. A ring-shaped fixed frame having a ring-shaped sliding surface on the inside, a rotary ring having a sliding portion on its side surface that slides on the sliding surface of the fixed frame, and the rotating ring. A tape bobbin comprising: a rotating means for rotating a ring; a bobbin holder fixed inside the rotating ring; and a tape bobbin rotatably attached to the bobbin holder, wherein the tape bobbin and the tape bobbin A guide provided at a position vertically separated from a line connecting the center of the rotating ring and attached to the bobbin holder or the roller holder fixed to the rotating ring so as to be rotatable via a rotation shaft. The roller, one end of which is fixed to the roller retainer and the other end of which is fixed to the rotation shaft of the guide roller, are expanded and contracted in a direction parallel to a line connecting the center of the tape bobbin and the center of the rotation ring, and the guide. A taping device comprising: a plate-shaped mainspring for moving a drag roller. 2. The fixing frame according to claim 1, wherein the fixed frame is formed in a C shape with a cutout portion provided in a part thereof, and the rotary ring is formed in a C shape with a cutout portion provided in a part thereof. Taping device.