JP3199079B2 - Method and apparatus for winding long body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for winding a long body, for example, a magnetic tape, an ink ribbon,
The present invention relates to a method for winding an adhesive tape, a photographic film, a long paper, or the like, and a winding device used in these methods.

[0002]

2. Description of the Related Art In a magnetic tape manufacturing process, a wide magnetic tape material in which a magnetic layer is formed on a non-magnetic base film is generally subjected to a predetermined surface treatment and then to a predetermined width in a slitting process. The sheet is cut into a magnetic tape, continuously conveyed at a constant conveying speed, and wound around a winding shaft (generally called a winding hub or a winding core).

[0003] The magnetic tape wound around the winding hub is called a pancake and is extremely long. In the next step, the magnetic tape is wound around a predetermined hub via a leader tape and has a predetermined length. Then, another leader tape is connected to the disconnected end. In a cassette magnetic tape, one end of the magnetic tape is wound around one hub via a leader tape, and the other end is connected to the other hub via another leader tape and housed in the cassette body. You.

[0004] From the viewpoint of productivity, it is desired that the magnetic tape of the pancake is as long as possible, and the longer the magnetic tape, the larger the scroll diameter of the pancake. From the same viewpoint, it is desired that the conveying speed from the cutting step of the magnetic tape be as high as possible.

Furthermore, when the magnetic tape in the pancake is wound on another hub in the next step, it must be wound up so that the side edges become flat. For this purpose, the magnetic tape in the pancake also needs to be well-behaved so that the side edges are flat, that is, wound around the take-up hub in a state where there is no winding disorder. This is because the winding in the next step is performed at a much higher speed than at the time of recording or reproduction, and the winding cannot be performed while correcting the winding disorder.

[0006] If the pancake has a turbulence in the magnetic tape, the side edges of the magnetic tape may be damaged during storage or transportation of the pancake.

When a magnetic tape is wound around a winding hub to form a pancake, a roll called a touch roll is used,
The magnetic tape portion conveyed is pressed against the already wound magnetic tape portion. The touch roll is designed to prevent air from entering between the magnetic tape portion being conveyed and the magnetic tape portion already wound, and to remove a thin film of air (air film) formed here. It is for doing.

By the way, as the transport speed of the magnetic tape increases, it becomes more difficult for the air film to come off. Therefore, the pressing pressure by the touch roll is increased. However, recently there is a tendency to smooth the surface of magnetic tape,
In the case of a magnetic tape that is thin and has a small surface roughness and is easy to slip, the slip effect of the air film becomes larger. Therefore, when the pressure for pressing by the touch roll is further increased, wrinkles are generated.

As a method for winding a magnetic tape for preventing the pancake from being disturbed, for example, the following method has been proposed in Japanese Patent Application Laid-Open No. Sho 62-31645. That is, as shown in FIG. 11, the magnetic tape 20B cut to a predetermined width by a slitter (not shown) is conveyed while being suspended by a guide roller 72, and passes through rollers 74, 76, and 78 and rotates in the direction of arrow A. It is wound around the take-up hub 1.

Before the magnetic tape 20B reaches the tape roll 20C already wound on the winding hub 1, the magnetic tape 20B is suspended by the position regulating roller 74 supported by the touch arm 77 to change the transport direction. The direction of entry into is regulated.

Further, the magnetic tape 20B is a tape roll 20C.
At the position where the touch arm 77 and the plate-shaped member 79 rotatably supported by the touch arm 77, a flange-shaped edge regulating roller 76 as a touch roller biased by a spiral spring 75 is used in the width direction. Is pressed onto the tape roll 20C while its position is regulated.

Further, the magnetic tape 20B is a tape roll 20C.
Is pressed by the pressing roller 78 while being at the outermost periphery of the magnetic tape, so that the air film between the magnetic tape and the tape roll comes off. The pressing roller 78 is an edge regulating roller.
Along with 76, a spiral spring is supported by a plate-like member 79 that is rotatably supported on a touch arm 77 around a fulcrum P _1.
75 urges the magnetic tape 20B in the direction of pressing against the tape roll 20C. The pressing force of the pressing roller 78 is larger than that of the edge regulating roller 76.

When the scroll diameter of the tape roll 20C becomes large, a flanged auxiliary edge regulating roller urged by a spiral spring 82 via a touch arm 81 is provided at a position substantially facing the pressing roller 78 in the radial direction. 80 are provided.

However, in the above method, the tape roll 20C
According scroll diameter changes of the touch arms 77 about the fulcrum P ₂ rotates in the direction of arrow B, the pressing force of the edge restraining roller 76 and the touch roll 78 changes the biasing force of the spiral spring 75 is changed Therefore, the effect of the air film coming out cannot be exerted uniformly. Further, under the above-described conditions in which winding disturbance is likely to occur, both the edge regulating roller 76 and the auxiliary edge regulating roller 80 press the magnetic tape 20C while rotating, so that deflection in the rotation axis direction can be completely avoided. As a result, the effect of preventing winding turbulence is not perfect.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and even if the transport speed of a long body is high and the scroll diameter of the long body is large, the turbulence may occur. The long body can be wound up neatly without causing wobble. An object of the present invention is to provide a method for winding a long body and a device therefor.

[0016]

The present invention has the following configuration to achieve the above object.

According to a first aspect of the present invention, when the elongate body is wound around a winding shaft, the elongate body is pressed against the winding shaft by a pressing means, and the elongate body is pressed on the elongate body entrance side of the pressing means. The position of the elongate body is regulated in the width direction by guide means fixed in position relative to the elongate body and the sliding surface with respect to the elongate body is a curved surface, and the winding diameter of the elongate body Corresponding to the change, the radius of curvature of the area of the sliding contact surface that comes into contact with the elongated body is changed so as to decrease from the discharge side to the entry side of the elongated body. According to the winding method.

According to a second aspect of the present invention, there is provided a winding shaft for winding a long body, pressing means for pressing the long body toward the winding shaft,
A guide means which is located on the long body entry side of the pressing means, and is fixed in position relative to the long body, and a sliding surface with respect to the long body is a curved surface; Corresponding to the change in the winding diameter of the elongated body, the radius of curvature of the area of the sliding contact surface that comes into contact with the elongated body changes so as to decrease from the discharge side of the elongated body toward the entrance side. Means for changing the position of the guide means.
The present invention relates to a long body winding device. In this winding device, the pressing means may be formed of an elastic roll, and the guide means may be formed of a pair of flanges for guiding the elongated body, and a guide block having a sliding contact surface that slides on the elongated body, Further, it is preferable that a gas introducing means for introducing gas is provided between the sliding contact surface of the guide block and the elongated body. Further, it is preferable to have a rotation speed control means for changing the rotation speed of the winding shaft according to the rotation speed of the drive shaft for driving the winding shaft.

[0019]

Embodiments of the present invention will be described below.

First, the outline of the magnetic tape slitting step and the subsequent winding step (pancake forming step) will be described with reference to FIG.

The magnetic tape material 20 wound around the feeding hub 61
A is a transport mechanism 62 composed of a pair of feeding rolls 63A and 63B.
Are fed in the direction of the arrow at a predetermined speed, and are cut into a predetermined width by a slitting mechanism 64 composed of a group of slitters 65A and 65B that rotate while slightly overlapping each other to form a group of magnetic tapes 20B.

In the group of magnetic tapes 20B, adjacent magnetic tapes are alternately transported by a pair of guide rollers 66, 66, and are transported by nip rolls 67, 68; 67, 68, respectively. , And rolled into pancakes 20D, 20D. Nip rolls 67, 68; 67, 68 apply predetermined tension to the magnetic tape material 20A and the magnetic tape 20B between the guide rollers 66, 66 and the transport mechanism 62 so that slitting can be performed smoothly. It is.

FIG. 1 is a front view showing details of the periphery of the take-up hub 1 of FIG.

The magnetic tape 20 conveyed as shown by the arrow
The transfer direction of the magnetic tape B is changed by the guide rollers 14 and directed to the outermost peripheral surface of the magnetic tape 20C already wound around the winding hub 1 by the guide block 7. At this time, the position of the magnetic tape 20B in the width direction is regulated by the flanges 9 on both side surfaces of the guide block. Immediately downstream of the guide block 7, a rubber-made touch roll 12 is located, and the air film between the outermost peripheral portion of the magnetic tape 20B and the magnetic tape 20C that has been wound before the rubber is rolled from the side end. I try to escape.

The guide block 7 is fixed to the tip of the touch arm 4 branching from the touch arm base 2 which can swing about the fulcrum 3. The curved sliding contact surface 8a of the main body 8 is weighted by its own weight. Is regulated in the width direction while approaching the magnetic tape 20C already wound.

The touch roll 12 includes the touch arm base 2
The touch arm plate 10 is rotatably mounted on the fulcrum 6 on the distal end side of the touch arm plate 10 so as to be pivotable about the fulcrum 6. And presses the wound magnetic tape 20C.

FIG. 2 is an enlarged front view of the guide block 7, FIG. 3 is an enlarged bottom view thereof, and FIG. 4 is a sectional view taken along line IV-IV of FIG.

In regions other than the magnetic tape entry side of the main body 8 of the guide block 7, flanges 9 and 9 are provided on both side surfaces so as to be inclined so as to spread downward. The magnetic tape 20B enters from the position shown by the two-dot chain line in FIG.
At a position indicated by a one-dot chain line slightly floating from the sliding contact surface 8a, the magnetic tape 20C comes into pressure contact with the wound magnetic tape 20C (see FIG. 1). The slight floating from the sliding surface of this magnetic tape
Magnetic tape entry side of guide block body 8 and magnetic tape
This is caused by the natural intrusion of the air 19 indicated by the arrow between the space 20B. Thereby, the friction between the guide block main body 8 and the magnetic tape 20B becomes extremely small.

The guide block body 8 is made of, for example, an aluminum alloy or stainless steel, and the flanges 9, 9 are made of wear resistant zirconia (ZrO ₂ ). The width W of the sliding contact surface of the guide block body 8 is ± 500 μm with respect to the width of the magnetic tape 20B, and the inclination angle θ of the flange 9 is 0 to
Set to a range of 20 degrees. Thus, magnetic tape 20B
Is precisely positioned in the width direction by the flanges 9, 9, so that winding disturbance is effectively prevented.

The sliding contact surface 8a of the guide block body 8 is designed to maintain line contact and allow air 19 to enter, as shown in FIGS.
It is a curved surface as shown in FIG. As shown in FIG. 5, as the scroll diameter of the wound magnetic tape 20C changes from a small diameter to a large diameter, the sliding contact portion 8b becomes a two-dot chain line, a one-dot chain line,
Since the magnetic tape changes from the discharge side to the entry side as shown by the solid line, in this example, the radius of curvature of the sliding contact surface 8a is gradually reduced from the discharge side to the entry side of the magnetic tape, and a good line contact is always obtained. I try to keep.

However, as shown in FIG. 6, the curvature of the sliding contact surface 8a is kept constant, and the surface roughness of the sliding contact surface 8a is gradually changed from small to large from the discharge side to the entry side of the magnetic tape. ,
The coefficient of friction with the magnetic tape may be kept substantially constant.

In addition to allowing the above-described invasion of the air 19 naturally, an air nozzle 15 indicated by a virtual line in FIG. 1 is provided, and the air 19 is forcibly intruded between the guide block body 8 and the magnetic tape 20B. You may make it do.

Alternatively, a number of air supply holes 8c indicated by phantom lines in FIGS. 2 and 3 may be provided, and air 19 may be positively supplied to the magnetic tape from the air inlet 8d by a pump (not shown).

[0034]

[0035]

FIG. 7 shows an example in which the position of the sliding portion of the guide block with respect to the magnetic tape is kept constant irrespective of the scroll diameter of the wound magnetic tape.

In this example, the touch arm 26 to which the guide block 27 is fixed is guided by the guide 30, and the guide block 27 is moved substantially vertically toward the center of the winding hub 1. The touch roll 12 is rotatably attached to a lever 31 provided independently of the guide block 27. The lever 31 is swingable about a fulcrum 31a, and the touch roll 12 is urged by a coil spring 32 attached to the lever 31 to press the wound magnetic tape 20C.

FIG. 8 is an enlarged sectional view showing an example in which a plurality of (two in this example) sliding contact surfaces are formed on the guide block main body. The body 38 of the guide block 37 has two sliding surfaces
38a and 38b are formed, and a small concave portion 38c is formed between both sliding contact surfaces 38a and 38b. In the figure, 39 is a flange.

When the sliding portion with the magnetic tape 20B moves as the scroll diameter of the magnetic tape 20C changes as in the example of FIG. 1, the downstream side is initially used when the scroll diameter of the magnetic tape 20C is small. Tape 20 on the sliding surface 38b
In the latter half of the time when B slides and the scroll diameter of the magnetic tape 20C increases, the upstream sliding contact surface 38a slides on the magnetic tape 20B. Therefore, the surface roughness should be large on the upstream sliding contact surface 38a and small on the downstream sliding contact surface 38b.

As shown in the example of FIG. 7, when the sliding portion with the magnetic tape 20B is at a fixed position irrespective of the scroll diameter of the magnetic tape 20C, the magnetic tape 20B is first wound on the already wound magnetic tape. The magnetic tape 20C is pressed against the outermost surface of the magnetic tape 20C while sliding on the upstream sliding contact surface 38a without contacting with the 20C, and then sliding on the downstream sliding contact surface 38b.

In this case, the upstream sliding contact surface 38a and the magnetic tape
The air that has entered the space 20B is stored in a small recess 38c between the sliding surfaces 38a and 38b, and the friction between the downstream sliding surface 38b and the magnetic tape 20B is further reduced, and the air film is removed. Is more certain.

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050]

[0051]

[0052]

The magnetic tape is supplied at a constant speed.
Therefore, the winding hub is required to reduce the number of revolutions as the scroll diameter of the magnetic tape increases and to wind the magnetic tape neatly without causing winding disturbance.

As a shaft coupling meeting such a demand, a mechanism for rotating a driven shaft at a rotation speed smaller than the rotation speed of a driving shaft by utilizing a eddy current generated by incorporating a permanent magnet and a copper plate therein (hereinafter, referred to as a shaft coupling). Torque clutch). In general, a torque clutch has a structure in which a hollow driven shaft is coaxially arranged around a driving shaft. In a torque clutch that rotates coaxially at a different rotation speed, a phase shift occurs and resonance occurs.

In the next example, a winding mechanism as shown in FIG. 9 is used to prevent the winding disturbance caused by the resonance caused by using the driven shaft as the drive shaft of the winding hub as it is.

That is, a fixed shaft 51 having a predetermined diameter is provided, and a hub holder 52 is detachably mounted on the peripheral surface of the fixed shaft 51. The hub holder 52 has an outer diameter of about 114 mm and an inner diameter of about 76
The winding hub 1 having a dimension of mm (according to the standard of the NAB hub) is held. The take-up hub 1 is driven to rotate together with the supply hub holder 52 as described later, so that the magnetic tape 20B supplied at a predetermined speed to the outer peripheral surface of the take-up hub 1 is taken up.

On the other hand, in parallel with the fixed shaft 51, the torque clutch
56 are arranged. The torque clutch 56 is connected to a motor (not shown), and the rotation of the motor is transmitted to an input shaft (drive shaft) of the torque clutch 56. A drive belt 57 is stretched between the torque clutch 56 and a belt latching mechanism 52a provided on the side of the hub holder 52. Thus, the torque generated by the torque clutch 56 is transmitted to the hub holder 52 via the drive belt 57, and the hub holder 52 is driven to rotate along with the winding hub 1 along the peripheral surface of the rotating shaft 51.

At this time, a bearing 58 is provided between the hub holder 52 and the peripheral surface of the rotating shaft 51 in contact with the rotating shaft 51, so that the hub holder 52 is slidably driven to rotate.

Accordingly, in this winding device, the magnetic tape 20B cut to a specified tape width by the cutting machine is sent out from the unwinding side at a predetermined speed, and the rotation of the motor is controlled by the torque clutch 56 and the drive belt. Torque is transmitted to the hub holder 52 via the hub 57, and the winding hub 1 is rotationally driven together with the hub holder 52, so that the magnetic tape 20B is sequentially wound on the outer peripheral surface of the winding hub 1 as a roll-shaped magnetic tape 20C.

Thus, the winding hub 1 is connected to the torque clutch 56
And the drive belt 57, the shaft for supporting the take-up hub 1 can be fixed, and at the same time, the rotational speed of the take-up hub 1 is reduced by the torque clutch 56 to the magnetic tape 20B. Can be controlled so as to be equal to the transfer speed. Therefore, in the winding device having such a configuration, unlike the case where the conventional clutch structure is directly used, there is no possibility that two or more rotation speeds exist in the device, and there is no possibility that resonance occurs. . For this reason, it is possible to prevent the magnetic tape from being distorted in the width direction, which is very advantageous in increasing the speed of the apparatus.

In this winding device, the torque clutch
Since the number of rotations of the take-up hub 1 can be controlled by appropriately setting the number of rotations of 56, the magnetic tape 20B can be wound while always applying a constant tension so as not to be slackened and not to be pulled too much. it can. Therefore, unlike the conventional winding device, there is no need to provide a mechanism for generating a constant winding tension in the hub holder.
Can be made compact. Conversely, since the dimensions of the take-up hub 1 are fixed according to the standard, the diameter of the fixed shaft 51 can be increased by reducing the size of the hub holder 52. For this reason, the width of the magnetic tape web 20A (raw web width) is widened, and accordingly, the number of winding hubs 1 for winding the magnetic tape 20B is increased, and the length of the shaft 51 is increased. Even so, the strength of the fixed shaft 51 for supporting the take-up hub 1 can be secured to some extent, and the bending of the fixed shaft 51 can be suppressed, so that good winding can be performed. You.

In the above embodiment, the winding device was used to wind the magnetic tape cut to a predetermined width. However, the winding method and the device of the present invention can be applied to, for example, an ink ribbon, a printed material, a film, The present invention can be similarly applied to orderly winding of any long rolled material such as an adhesive tape.

[0063]

According to the present invention, the elongate body is pressed against the winding shaft by the pressing means, and the guide means is fixed at a position relatively to the elongate body on the elongate body entry side of the pressing means. The position of the elongate body is regulated in the width direction, and in response to the change of the winding diameter of the elongate body, the guide means comes into contact with the elongate body on the sliding contact surface with the elongate body. Since the radius of curvature of the region to be changed is changed so as to decrease from the discharge side to the entry side of the long body, in addition to fixing the relative position of the guide means to the long body, the winding diameter changes. Since the contact state of the elongate body with the guide means is always good, the elongate body is accurately guided, wound up neatly without winding disorder, and between the elongate bodies overlapping each other in the winding state. Air is reliably removed.

As a result, even if the wound long body has a high approach speed or a slippery surface state, the long body is wound up neatly without causing winding disorder, and the side edges are damaged. There is no fear of receiving.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a magnetic tape winding device according to a first embodiment.

FIG. 2 is an enlarged front view of the guide block.

FIG. 3 is an enlarged bottom view of the guide block.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of the guide block, showing a change in a magnetic tape entry direction with respect to the guide block according to the first embodiment.

FIG. 6 is an enlarged sectional view of a guide block according to a second embodiment.

FIG. 7 is a front view of a guide block, a touch roll, and their surroundings according to a third embodiment.

FIG. 8 is an enlarged sectional view of a guide block according to a fourth embodiment.

FIG. 9 is a schematic sectional view of a take-up hub rotation control mechanism according to a fifth embodiment.

FIG. 10 is a schematic front view showing an outline of a magnetic tape slitting step and a subsequent winding step.

FIG. 11 is a front view of a main part of a conventional magnetic tape winding device.

[Explanation of symbols]

 1 Take-up hub 7, 27, 37 Guide block 8, 28, 38 Guide block main body 8a, 28a, 38a, 38b Sliding contact surface 8b Contact portion 8c Air supply hole 9, 29, 39 Flange 11 Coil spring 12 Touch roll 15 Air nozzle 19 Air 20A Magnetic tape material 20B Magnetic tape 20C Wound magnetic tape 20D Pancake

Claims (5)

(57) [Claims] When the long body is wound around a winding shaft, the long body is pressed against the winding shaft by a pressing means, and the long body enters the long body at a side where the long body enters the pressing means. The position of the elongate body is regulated in the width direction by guide means that is relatively fixed in position relative to the elongate body and a sliding surface with respect to the elongate body is a curved surface, and the winding diameter of the elongate body changes. Correspondingly, changing a radius of curvature of a region of the sliding contact surface that comes into contact with the elongated body so as to decrease from a discharge side to an entrance side of the elongated body. . 2. A winding shaft for winding a long body, pressing means for pressing the long body toward the winding shaft, and a pressing member which is located on the long body entry side of the pressing means, and A guide means fixed in position relative to the body and having a curved sliding surface with respect to the elongated body; and a sliding surface corresponding to a change in the winding diameter of the elongated body. Means for changing the position of the guide means in order to change the radius of curvature of the area in contact with the elongated body from the discharge side to the entrance side of the elongated body so as to decrease. Body winding device. 3. The device according to claim 2, wherein the pressing means comprises an elastic roll, and the guide means comprises a guide block having a pair of flanges for guiding the elongated body and a sliding contact surface for slidingly contacting the elongated body. The described long-length winding device. 4. The winding device for a long body according to claim 3, wherein gas introducing means for introducing a gas is provided between the sliding contact surface of the guide block and the long body. 5. The length according to claim 2, further comprising a rotation speed control means for changing the rotation speed of the winding shaft according to the rotation speed of the driving shaft for driving the winding shaft. Winding device for measuring body.