JP2001114461A - Guide roller device and magnetic tape manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide roller device capable of improving the quality of a sheet-shaped supporting body. SOLUTION: This guide roller device 1 conveys a sheet-shaped supporting body. Rubber sheets 1 are used on parts kept into contact with both side parts of the sheet-shaped supporting body 2. A dynamic frictional coefficient of the rubber sheets 3 to the sheet-shaped supporting body 2 is preferably above 0.4. The rubber sheets 3 are placed in recessed grooves formed on the guide roller device 1. The depth of the grooves is preferably equal to or less than the total thickness of the rubber sheet 3. The guide roller device 1 for conveying the sheet-shaped supporting body 2 can be applied to, for example, a magnetic tape manufacturing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a guide roll device and a magnetic tape manufacturing device using the same.

[0002]

2. Description of the Related Art Generally, when a sheet-like support is transported by various apparatuses, a plurality of guide rolls are used in a traveling system. In such an apparatus, it is important to maintain the running stability of the sheet-like support and not to adversely affect the quality of the sheet-like support. Factors that cause unstable running of the sheet-like support include, for example, poor rotation of the guide roll due to the generation of an air film, and occurrence of side slip of the sheet-like support.

[0003] In addition, adverse effects on the quality of the sheet-like support include damage to the sheet-like support due to poor rotation of the guide roll and damage to the sheet-like support due to running resistance generated between the sheet-like support and the guide roll. Can be

[0004] These problems will be described using a magnetic tape as an example. In recent years, high-density recording has been advanced in magnetic tapes, and the surface properties of a base film, the thickness of a coating layer, and the surface properties have been improved. When the above-mentioned problem occurs in the conveyance of such a magnetic tape or base film, an increase in dropout, that is, an increase in missing recording due to scratches on the recording layer surface of the magnetic tape, or an increase in image quality The tape characteristics are degraded, such as the adverse effect of the tape.

[0005] The slip shift of the sheet-shaped support makes traveling unstable and causes a trouble to stop the running machine.

[0006]

As the above countermeasure, for example, a type in which the rotation resistance of the guide roll is small is used. However, the higher the speed of conveyance, the greater the amount of air film, so that poor rotation tends to occur. This is more remarkable as the wrap angle of the guide roll of the sheet-like support is smaller.

[0007] In addition, the guide roll is driven, but it is difficult to accurately match the peripheral speed of the guide roll with the traveling speed of the sheet-like support. There is a need.

Further, the guide roll may be made of rubber having high friction. In this case, the roll accuracy is likely to be deteriorated due to wear and deterioration of the rubber, thereby causing wrinkles and unstable running of the sheet-like support. Maintenance such as frequent surface polishing is required, and maintenance is difficult. Also,
There is a problem of re-adhesion to the sheet-like support due to adhesion of dust, and the reliability is lacking.

The present invention has been made in view of the above problems, and has as its object to provide a guide roll apparatus capable of improving the quality of a sheet-like support and a magnetic tape manufacturing apparatus using the same. I do.

[0010]

According to a guide roll device of the present invention, in a guide roll device for transporting a sheet-like support, rubber is used for a portion in contact with both sides of the sheet-like support. Things.

Further, the guide roll device of the present invention is a guide roll device having the above-mentioned structure, wherein the dynamic friction coefficient of rubber with respect to the sheet-like support is larger than 0.4.

Further, the guide roll device of the present invention is a guide roll device having the above-mentioned structure, wherein the dynamic friction coefficient of rubber with respect to a sheet-like support is larger than 0.4, and the rubber is in a sheet shape.

Further, in the guide roll device according to the present invention, the coefficient of kinetic friction of the rubber with respect to the sheet-like support is larger than 0.4, the rubber is a sheet, and the rubber is formed in a concave groove provided in the guide roll. It is a guide roll device of the above-mentioned configuration installed in a.

Further, in the guide roll device of the present invention, the dynamic friction coefficient of the rubber with respect to the sheet-like support is larger than 0.4, the rubber is a sheet-like shape, and the rubber is a concave groove provided in the guide roll. And the groove depth is equal to or less than the total thickness of the rubber.

Further, according to the magnetic tape manufacturing apparatus of the present invention, in a magnetic tape manufacturing apparatus including a guide roll device for transporting a sheet-like support, rubber contact portions are provided on both sides of the above-mentioned sheet-like support. Is used.

According to the guide roll device and the magnetic tape manufacturing device of the present invention, in the guide roll device for transporting the sheet-like support, rubber is used in a portion that comes into contact with both sides of the sheet-like support. Thereby, the slip in the longitudinal direction and the width direction between the sheet-like support and the guide roll hardly occurs, and the traveling speed of the sheet-like support and the peripheral speed of the guide roll can be made almost the same.

[0017]

Embodiments of the present invention will be described below. First, an embodiment of the invention relating to a guide roll device will be described with reference to FIGS. FIG. 1 is a perspective view of a guide roll device according to the present invention, that is, a guide roll device for transporting a sheet-like support.
In FIG. 1, a sheet-like support 2 is a flexible sheet-like material such as a magnetic tape. The guide roll device 1 has a substantially cylindrical shape made of metal, and rotates around a central axis of the cylinder.

A rubber sheet 3 is used near both sides of the guide roll device 1 in the axial direction. This rubber sheet 3
Are used in portions that come into contact with both sides of the sheet-like support 2.

The rubber sheet 3 has a predetermined width and thickness. The thickness and width of the rubber sheet 3 used are not restricted at all. However, the thickness of the silicone rubber is desirably in the range of 50 to 1000 μm. When the thickness of silicon rubber becomes thinner than 50 μm,
There is a disadvantage that the durability is significantly deteriorated. Further, when the thickness of the silicone rubber is more than 1000 μm, there is a drawback that the rubber becomes stiff and easily peels off.

The width of the silicone rubber is 5 to 100 mm.
Is desirably within the range. Silicon rubber width is 5m
If it is smaller than m, there is a disadvantage that the contact area with the sheet-like support is too small to obtain a sufficient driving force.
On the other hand, if the width is larger than 100 mm, it will be so large that it comes into contact with the product part. In addition, there is a disadvantage in that the amount of the rubber sheet used is large and wasteful.

The material of the rubber sheet 3 is desirably a material having a high friction coefficient and a high releasability, such as silicon rubber. The material of the rubber sheet is not limited to this silicone rubber. In addition, butyl rubber, nitrile rubber, urethane elastomer, natural rubber, fluorine rubber, and the like can be used.

The coefficient of kinetic friction of the rubber sheet 3 with respect to the sheet-like support 2 is preferably larger than 0.4. Also,
More preferably, the dynamic friction coefficient of the rubber sheet 3 with respect to the sheet-like support 2 is 0.7 or more.

Also, an adhesive layer may be formed inside the silicone rubber. Here, the purpose of providing the pressure-sensitive adhesive layer is to affix the silicone rubber to the guide roll device 1 and to facilitate replacement and replacement when the silicone rubber has deteriorated. The material of the adhesive is not particularly limited, but an acrylic adhesive or the like can be used.

Further, a sheet such as polyethylene terephthalate (hereinafter, referred to as “PET”) may be used as a rubber support. That is, P
A layer made of a sheet such as ET is formed, and a pressure-sensitive adhesive layer is further formed inside the layer. That is, if the surface is rubber, the structure of the rubber sheet is not restricted. here,
The purpose of providing a layer made of a sheet such as PET is to improve the dimensional accuracy of the rubber sheet 3 and to improve the workability of sticking to the guide roll device 1. The material of the layer made of a sheet such as PET is PE.
In addition to T, polypropylene, nylon, polyethylene and the like can be used.

The method of mounting the rubber sheet 3 to be used on the guide roll is not subject to any restrictions. However, in consideration of the maintainability at the time of deterioration, the mounting method requires winding a sheet-like rubber, It is desirable that it can be easily replaced according to the requirements.

Further, the rubber sheet 3 is transferred to the guide roll device 1
When wrapping around, there is a step between the wound part and the unwound part,
The traveling sheet-shaped support 2 may be adversely affected. In this case, the portion of the guide roll device 1 around which the rubber is wound can be made concave in advance. FIG. 2 is a sectional view showing an example of the guide roll device according to the present invention. FIG.
As shown in the figure, the rubber sheet 3 is installed in a concave groove 4 provided in the guide roll device 1.

By providing the rubber sheet 3 in the groove 4, the step between the rubber sheet surface and the guide roll surface can be reduced. In this case, it is necessary that the dimension is groove width ≧ rubber sheet width. Here, the difference between the groove width and the rubber sheet width is desirably in the range of 0 to 1 mm. If this difference is smaller than 0 mm, there is a disadvantage that the rubber sheet does not enter the groove. If this difference is larger than 1 mm, the sheet-like support falls into the gap between the groove and the rubber sheet, and suffers from a drawback of being damaged.

Also, the outer diameter of the portion where the rubber sheet is wound is
Set to be equal to or larger than the outer diameter of the guide roll. Therefore, the depth of the groove 4 is set to be equal to or smaller than the total thickness of the rubber sheet 3, that is, the groove depth ≦ the total thickness of the rubber sheet. Here, the difference between the groove depth and the total thickness of the rubber sheet is desirably in the range of 0 to 300 μm. If this difference is smaller than 0 mm, the outer diameter of the rubber sheet portion becomes smaller than the outer diameter of the guide roll, and there is a drawback that the effect of stretching the sheet-like support cannot be obtained. Also, this difference is 300
If it is larger than μm, the step between the surface of the rubber sheet and the surface of the guide roll becomes large, resulting in a disadvantage that the sheet-like support is easily damaged.

In the above description, an example in which the rubber sheet 3 is installed in the groove 4 of the guide roll device 1 has been described, but the present invention is not limited to this method. FIG. 3 is a sectional view showing another example of the guide roll device according to the present invention. In this example, the rubber sheet 3 is directly adhered to the surface of the guide roll device 1 without providing a groove for installing the rubber sheet 3 in the guide roll device 1. The rubber sheet 3 directly attached to the surface of the guide roll device 1 in this manner is different from the rubber sheet 3 installed in the groove 4 of the guide roll device 1 in that the existing guide roll device is somewhat different. There is a cost advantage that it can be used as it is without processing, and a rubber sheet can be attached to any position.

In the guide roll device of the present invention, the peripheral speed of the guide roll and the running speed of the sheet-like support are made substantially equal by obtaining high friction between the rubber sheet of the guide roll device and the end of the sheet-like support. Can be done. Since the slip force does not occur due to the frictional force, the running of the sheet-like support is stabilized. In addition, most of the resistance that the sheet-shaped support receives when the sheet-shaped support drives the guide roll is received at the end of the sheet-shaped support via the rubber sheet of the guide roll. For this reason, a product part, that is, 5 to 2 from both ends in the width direction of the sheet-shaped support member.
The inner portion of 0 mm does not receive the resistance that causes damage, and there is no adverse effect on quality.

Further, by making the outer diameter of the rubber sheet portion slightly larger than the outer diameter of the guide roll, a width effect of the sheet-like support can be obtained and wrinkles can be prevented. Here, the reason why the tentering effect is obtained is that the speed of the circumference of the guide roll is higher in a portion having a large outer diameter than in a portion having a small outer diameter.
Therefore, the sheet-like support is pulled in the direction of the higher peripheral speed. As a result, the sheet-like support is pulled at both ends, so that a tentering effect is generated.

Next, an embodiment of the invention relating to a magnetic tape manufacturing apparatus using the above-described guide roll device will be described.
This will be described with reference to FIGS. Here, in a magnetic tape manufacturing apparatus including a guide roll device for transporting a sheet-like support, an embodiment in which the guide roll device of the present invention is used for transporting an original magnetic tape will be described.

FIG. 4 is a diagram showing an embodiment of a guide roll device applied to the magnetic tape manufacturing apparatus according to the present invention. That is, FIG. 4 shows a part of a plurality of guide roll devices installed for conveyance. Here, an original magnetic tape was used as the sheet-like support 2. The width of the magnetic tape is 800 mm.

Next, the specifications of the rubber sheet used in this embodiment will be described with reference to FIG. Rubber sheet 3
Is silicone rubber (trade name: silicone rubber tape part numbers 5463, 5461, 5446, etc.). This silicone rubber has a dynamic friction coefficient of 0.4, 0.
7, 1.0 and 1.2 were prepared. Here, the coefficient of friction of the rubber sheet was measured according to JIS-K-7125.

The thickness of the silicone rubber was set to 400 μm, and an adhesive layer was formed to a thickness of 50 μm inside the silicon rubber. Therefore, the total thickness of the rubber sheet is 450 μm. The width of the rubber sheet is 20 mm.

The surface of the guide roll is plated with chrome,
The size is 80 mm in diameter and the width is 1000 mm. The material of the guide roll surface is not limited, and may be, for example, hard anodized.

As shown in FIG. 1, both ends of the sheet-like support 2 are brought into contact with the rubber sheet 3 within a range of 5 to 20 mm, as shown in FIG. If the length at which both ends are in contact is shorter than 5 mm, the contact area with the sheet-like support is too small, resulting in a disadvantage that a sufficient driving force cannot be obtained. Further, when the contact length of both ends is longer than 20 mm, there is a high possibility that the contact portion comes into contact with the product portion, and there is a disadvantage that the sheet-like support may be wrinkled. Here, the contact width with the rubber sheet 3 at both ends of the sheet-like support 2 was 15 mm.

As shown in FIG. 2, the portion around which the rubber sheet 3 is wound is a concave groove 4, and the rubber sheet is wound around the inside of the groove 4 once. Here, the groove width was 20.5 mm, and the groove depth was 350 μm.

The guide roll device manufactured in this manner was used as a magnetic tape coating device, and was run at 300 m / min while applying the magnetic tape. The wrap angle of the magnetic tape with respect to the guide roll was 15 °. Here, the reason why the wrap angle is reduced to 15 ° is to confirm the effect of the present invention in a state where rotation failure of the guide roll is likely to occur.

In the above-described guide roll device, the peripheral speed of the guide roll was measured, and the scratch on the magnetic tape surface was visually checked. About scratch,
When there was nothing visually confirmed, it was evaluated as ○, and when it occurred, it was evaluated as ×. For comparison, a guide roll having the same specifications as described above except that there was no groove or rubber winding was used, and the magnetic tape was run as described above.

The experimental results are as shown in Table 1.

[0042]

[Table 1]

As can be seen from Table 1, the kinetic friction coefficient was set at 0.
Desirably, the dynamic friction coefficient is 0.7 or more.
The above case is more desirable, and a very remarkable effect can be obtained.

As described above, according to the embodiment of the present invention, there is almost no slip in the longitudinal direction and width direction of the magnetic tape between the running magnetic tape and the guide roll, and the running speed of the magnetic tape and the guide roll Can be made almost the same. As a result, the quality of the product can be improved without the magnetic tape surface being damaged by the guide roll. In addition, since there is no slip shift or the like, the running of the magnetic tape is stabilized, the operation trouble of the machine can be reduced, and the productivity can be improved. These can be realized at low cost.

In the guide roll device, the following effects can be obtained by bringing the rubber sheet into contact only with the end of the sheet-like support. That is, when the rubber sheet is brought into contact with the entire surface of the sheet-like support, the rubber is liable to adhere to foreign substances and may affect the sheet-like support. Can avoid this. Further, by slightly increasing the outer diameters of both end portions, a width effect of the sheet-shaped support can be obtained. In addition, since the guide roll surface is exposed except for the rubber sheet portion, the accuracy (roundness and the like) of the guide roll main body can be maintained.

In the above-described embodiment of the present invention, a magnetic tape is used as an example of the sheet-like support, and a guide roll apparatus and a magnetic tape manufacturing apparatus using the same, which are suitable for conveying the magnetic tape, have been described. However, the present invention is not limited to these. The field of application of the present invention can be used in each device equipped with a guide roll device, such as a coating device handling various films, a printing machine, and a cutting machine. The product group can be used for magnetic tapes, ink ribbons, soft packaging materials, and the like.

Further, the present invention is not limited to the above-described embodiment, but can adopt various other configurations without departing from the gist of the present invention.

[0048]

The present invention has the following effects. In the guide roll device for transporting the sheet-like support, the quality of the sheet-like support can be improved by using rubber in portions that contact the side portions on both sides of the sheet-like support.

[Brief description of the drawings]

FIG. 1 is a perspective view of a guide roll device according to the present invention.

FIG. 2 is a sectional view showing an example of a guide roll device according to the present invention.

FIG. 3 is a sectional view showing another example of the guide roll device according to the present invention.

FIG. 4 is a diagram showing an embodiment of a guide roll device applied to the magnetic tape manufacturing apparatus according to the present invention.

[Explanation of symbols]

1 ‥‥ guide roll device, 2 ‥‥ sheet support, 3 ‥
‥ Rubber sheet, 4 ‥‥ groove

Claims (6)

[Claims] 1. A guide roll device for transporting a sheet-like support, wherein rubber is used in portions that contact both side portions of the sheet-like support. 2. The guide roll device according to claim 1, wherein the coefficient of dynamic friction of the rubber with respect to the sheet-like support is larger than 0.4. 3. The guide roll device according to claim 1, wherein the coefficient of kinetic friction of the rubber with respect to the sheet-like support is larger than 0.4, and the rubber is in the form of a sheet. 4. The method according to claim 1, wherein a dynamic friction coefficient of the rubber with respect to the sheet-like support is larger than 0.4, the rubber is a sheet, and the rubber is provided in a concave groove provided in a guide roll. The guide roll device according to claim 1, wherein 5. The dynamic friction coefficient of rubber with respect to a sheet-like support is larger than 0.4, the rubber is sheet-like, and the rubber is installed in a concave groove provided on a guide roll, and the depth of the groove is Is equal to or less than the total thickness of the rubber.
Guide roll device as described. 6. A magnetic tape manufacturing apparatus including a guide roll device for transporting a sheet-like support, wherein rubber is used in a portion in contact with both sides of the sheet-like support. Tape manufacturing equipment.