JPS6210891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape winding device that is advantageous for winding a narrow tape whose surface has been smoothed to a large diameter around a hub at a relatively high speed via a touch roller.

When winding a small width tape with a smooth surface onto a hub to a large diameter roll, the first step is to roll the tape to a constant hardness without causing local deformation in the inner layer of the tape winding layer; Second, it is important to align the tape edges and wind the tape in an orderly manner.

Conventionally, when winding tape around a hub, a flanged touch roller is brought into contact with a predetermined pressure on the outer periphery of the tape winding layer near the tape winding start point, but there is a problem with the touch pressure of this touch roller. It was hot. In other words, the conventional Tatsuchirolla is
It is pivotally supported at the tip of a swinging arm that is biased toward the hub by a spring, and as the diameter of the tape winding layer increases, the spring load increases, so that the touch pressure of the touch roller gradually increases. It's summery. Therefore, especially when the winding diameter of the tape is large, the touch pressure of the touch roller increases considerably near the end of winding compared to the beginning of winding, and the tightening action of the outer layer of the tape winding layer increases. As a result, a force acts to reduce the diameter of the inner layer, and as a result, local bending and waving phenomena occur in the inner layer. In addition, if the touch pressure at the initial stage of winding is set to be weak in advance, the entire tape winding layer will easily lose its shape, and the gap between the tape winding layer and the outer periphery during tape winding will increase. When the air trapped between the tapes escapes to the outside behind the Tatsuchi Roller, the tape also shifts in the width direction along with the air.
The problem was that the tape edges were not aligned throughout.

As a conventionally known technique aimed at solving these drawbacks, the one described in Japanese Patent Publication No. 52-2470 is recognized. In this case, when the touch pressure of the touch roller increases due to the increase in the winding diameter of the tape wound layer, the pivot point of the swing arm of the touch roller is moved by a certain amount so that the touch roller moves away from the outer periphery of the tape wound layer. By repeating this, the touch pressure of the touch roller acting on the tape winding layer is controlled to stay within a certain range from the beginning of winding to the end of winding.

However, as the winding diameter of the tape winding layer increases, excessive winding force acts on the tape winding layer not only due to the touch pressure of the touch roller, but also due to the increase in the winding diameter of the tape winding layer itself. This is largely due to the increase in surface velocity. Therefore, even if the touch pressure of the touch roller is set within a constant range from the beginning to the end of winding the tape on the hub, as in the prior art known above, this in itself does not provide a fundamental solution. In addition, the conventionally known example requires a configuration for movable the pivot point of the pivot arm of the touch roller, and a means for controlling the amount of movement thereof, resulting in a complicated structure and high cost.

The first object of the present invention is to improve such conventional drawbacks and to enable smooth winding of a narrow tape around a hub at high speed. The second object is to prevent winding deformation from occurring in the inner layer of the tape winding layer even when the tape winding diameter is large. Furthermore, the third objective is to make it possible to wind the tape with the tape edges neatly aligned even when the tape has a smooth surface, and its feature is to increase the winding diameter of the tape winding layer. The swing arm that pivotally supports the touch roller is weight-balanced so that the touch pressure of the touch roller gradually decreases as the touch roller moves.

The details of this invention will be explained below based on the drawings.

FIG. 1 illustrates an example of an apparatus for surface treating magnetic tapes to be incorporated into various magnetic tape cartridges before assembly. The front side of the frame 1 is slightly tilted backwards by about 15 degrees, and on the left and right sides of the upper part of the front side of the frame, a supply hub 3 on which a roll of magnetic tape 2 cut into small widths is attached and detached is attached. A winding drive shaft 6 on which an empty winding hub 5 engages and disengages is protrudingly provided.The magnetic tape 2 fed from the supply hub 3 is wound on the lower part of the front surface of the frame. A tape path leading to the pick-up hub 5 is constituted by a large number of guide roller groups 7. In the middle of this tape path, there is a mechanism 8 that acts on the magnetic surface of the running magnetic tape 2 to polish it smooth or to detect the presence of abnormal irregularities that have occurred on the magnetic surface. It is arranged.

In such a tape processing apparatus, the problem of the present invention is how to wind the tape 2 around the hub 5 in a good shape. This is shown in FIGS. 2 and 3.

First, on the front surface of the frame 1, a support shaft 9 parallel to the axis of the drive shaft 6 is protruded at a position diagonally above and to the right of the winding drive shaft 6 in the figure, and a swing arm is attached to the support shaft 9. 1
The base end of the swing arm 1 is swingably supported.
Tatsuchi roller 11 with flanges on both sides at the tip of 0
is pivoted for free rotation. Then, a touch roller 11 is brought into contact with the outer periphery of the tape winding layer 2a around which the hub 5 is wound, using its own weight, at a diagonally upper left position in the figure, that is, at a position immediately behind the winding start point of the tape 2.

Thus, another arm 10a is bolted and extends upwardly from the pivot base of the swinging arm 10 at a certain angle θ (99 degrees in the example shown), and a portion near the extending end of this arm 10a is provided. Fix the weight 12 to.
When the winding diameter of the tape winding layer 2a exceeds a certain level, the swinging arm 10 and the arm 10a swing together in the clockwise direction to follow the increase in the winding diameter. The balance is set so that the swinging moment of the movable arm 10 as a whole in the counterclockwise direction due to its own weight decreases, that is, the touch pressure of the touch roller 11 against the tape 2 decreases.

Further, a support shaft 13 is fixed to the front surface of the proximal end of the swing arm 10 with a screw 14 concentrically with the arm swing axis, and a pair of front and rear bearings 15,
Another swing arm 16 is pivotally supported via 15 so as to be swingable independently of the swing arm 10.
The swinging arm 16 extends diagonally downward to the right on the opposite side of the swinging arm 10, and has an auxiliary touch roller 17 with both flanges rotatably supported at its tip, and furthermore, the swinging arm 16 A weight 18 is attached to an arm 16a screwed to the base end, and the auxiliary touch roller 17 touches the tape wound layer 2a at a rear position that is an appropriate phase away from the point where the touch roller 10 contacts the outer periphery of the tape wound layer 2a. It is designed so that it comes into contact with the outer periphery of the body under its own weight.

When winding of the tape 2 onto the hub 5 is completed, one of the swing arms 10 drives its spindle 9 to swing upward, thereby separating the touch roller 11 from the tape winding layer 2a. The other swinging arm 16 can be retracted and held at a position away from the tape winding layer 2a by attracting a magnet piece 19 fixed to its upper surface to a magnetic adsorber 20 provided on the front surface of the frame. There is.

In such a case, at the beginning of winding the tape on hub 5,
As shown by the imaginary line in FIG. The touch pressure on the tape 2 is large, and the tape 2 is tightly wound around the hub 5 with a predetermined stiffness. However, before the tape winding layer 2a reaches at least half of the final winding diameter, the center of gravity P of the weight 12 moves beyond the imaginary perpendicular L to the right in the figure, and as the winding diameter increases, the touch roller 1
The touch pressure 1 gradually decreases, and the touch roller 11 no longer tightly wraps and compresses the inner layer of the tape wound layer 2a from the outer periphery. Tatsuchirolla 1
1, the tape 2 is wound around the outer periphery of the tape winding layer 2a with both flanges and guided, but further back, after waiting for the air trapped between the tapes to flow out to the outside, the tape 2 is wrapped with both flanges again. Since the auxiliary touch roller 16 performs the pressing and guiding action, it is now possible to wind the tape in a manner in which the tape edges are neatly aligned due to the two-step guiding action.

As explained above, in the present invention, the touch roller 11 is brought into contact with its own weight near the tape winding start point on the outer periphery of the tape winding layer 2a to press and align the tape 2, and then The touch pressure of the tape 2 by the touch roller 11 is made to decrease as the winding diameter of the winding layer 2a increases.
In particular, in the present invention, the swinging arm 10 is swingably supported on a support shaft 9 disposed above the drive shaft 6 with which the hub 5 engages, and the weight 1 is supported from the pivot base of the swinging arm 10.
The arm 10a to which the tape 2 is fixed is extended, and when the tape 2 starts to be wound around the hub 5, the center of gravity P of the weight 12 is aligned with the imaginary perpendicular L passing through the pivot axis of both the arms 10, 10a of the touch roller 11. However, when the tape winding layer 2a reaches a predetermined winding diameter, the center of gravity P of the weight 12 moves beyond the imaginary perpendicular L in the direction opposite to the position where the touch roller 11 exists. I made it. Therefore, in the early stage of tape winding around the hub 5, the touch pressure of the roller 11 can be set to a strong value to tightly wrap the tape 2, and the tape 2 can be tightened by the outflow of the air trapped between the tapes. It is possible to perform good winding with the tape edges aligned by preventing lateral deviation of the tape. On the other hand, a predetermined amount of tape 2 is wound around the hub 5, and the center of gravity P of the weight 12 is
exceeds the imaginary perpendicular L, the touch pressure of the touch roller 11 decreases rapidly, so that the inner layer of the tape-wound layer 2a is not excessively tightened and compressed from the outer periphery, and the inner layer is locally compressed. Deformations such as bending and waving can be reliably prevented.
As a result, it is extremely effective for winding a narrow tape 2 with a smooth surface onto a flangeless hub 5 or the like at a relatively high speed and to a large diameter.
In addition, the entire device can be made simple and trouble-free.
It has the advantage of being inexpensive.

In addition, at a location on the downstream side in the tape winding direction that is an appropriate distance apart from the location where the touch roller 11 contacts the tape winding layer 2a, another auxiliary touch roller 1 is provided.
7 was brought into contact with the outer periphery of the tape wound layer 2a by its own weight. Therefore, as the winding diameter of the tape winding layer 2a increases, the touch pressure of the touch roller 11 decreases, and as a result, the tape tends to shift laterally due to the outflow of air trapped behind the touch roller 11. Even if the auxiliary touch roller 17 is used to prevent the tape from shifting laterally,
Since the tape that has shifted sideways is wound in alignment, it is possible to wind the tape in a neat manner with the tape edges aligned as a whole.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a magnetic tape surface treatment device that is one of the application examples of the present invention, FIG. 2 is a front view of a tape winding device according to the present invention, and FIG. 3 is a partially cutaway view of the tape winding device according to the present invention. FIG. 1... Frame, 2... Tape, 5... Flangeless hub, 6... Drive shaft, 9... Support shaft, 10
... Swinging arm, 10a... Arm, 11... Tatsuchi roller, 12... Weight, P... Center of gravity of the weight,
16... Swinging arm, 16a... Arm, 17...
...Auxiliary tatsuchi roller, 18... Weight, 21... Wire rod.

Claims (1)

[Scope of Claims] 1. A device in which a hub 5 is engaged with a drive shaft 6 protruding from the front surface of a substantially vertical frame 1, and a narrow tape 2 is wound around the hub 5. A support shaft 9 is provided above the drive shaft 6 and parallel to its axis, and a swing arm 10 is swingably supported on the support shaft 9, and a touch roller is attached to the tip of the swing arm 10. 11 is rotatably supported, and the touch roller 11 is brought into contact with its own weight at a position near the tape winding start point on the outer periphery of the tape winding layer 2a wound around the hub 5, and the swing arm 10 The arm 10a to which the weight 12 is fixed is extended from the pivot base of the hub 5, and when the tape 2 begins to be wound around the hub 5, the center of gravity P of the weight 12 is aligned with a virtual perpendicular line passing through the pivot axis of both arms 10 and 10a. When the tape winding layer 2a reaches a predetermined winding diameter, the center of gravity P of the weight 12 moves toward the imaginary perpendicular line L.
The swing arm 1 is set to be displaced in the opposite direction to the existing position of the touch roller 11 beyond the position of the touch roller 11, so that the touch pressure of the touch roller 11 decreases as the winding diameter of the tape winding layer 2a increases.
A tape winding device characterized in that the weight of the tape is balanced. 2. In a device in which a hub 5 is engaged with a drive shaft 6 protruding from the front surface of a substantially vertical frame 1, and a narrow tape 2 is wound around the hub 5, a drive shaft 6 is mounted above the drive shaft 6 on the front surface of the frame 1. A supporting shaft 9 is provided protrudingly parallel to the axis of the rotating arm 10, and a swinging arm 10 is pivotably supported on the supporting shaft 9, and a touch roller 11 is freely rotatably supported at the tip of the swinging arm 10. The touch roller 11 is brought into contact with its own weight on the outer periphery of the tape winding layer 2a wound around the hub 5 in the vicinity of the tape winding start point, and the weight is removed from the pivot base of the swing arm 10. The arm 10a to which the weight 12 is fixed is extended, and when the tape 2 begins to be wound onto the hub 5, the center of gravity P of the weight 12 is aligned with the touch roller 11 relative to the imaginary perpendicular line L passing through the pivot axis of both arms 10, 10a. When the tape winding layer 2a reaches a predetermined winding diameter, the center of gravity P of the weight 12 moves toward the virtual perpendicular line L.
The swing arm 1 is set to be displaced in the opposite direction to the existing position of the touch roller 11 beyond the position of the touch roller 11, so that the touch pressure of the touch roller 11 decreases as the winding diameter of the tape winding layer 2a increases.
0, and a freely rotatable auxiliary member pivotably supported on the tip of a swinging arm 16 whose weight is balanced at a location downstream in the tape winding direction from the location where the Tatsuchi roller contacts the tape winding layer 2a. A tape winding device characterized in that a touch roller 17 is made independent of the touch roller 11 and is brought into contact with the touch roller 11 by its own weight.