JPH09175702A - Driving roller having suction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve driving efficiency by preventing generation of an air layer rolled in so as to be usable even for a thin film base material. SOLUTION: A suction box 14 arranged from the under side is arranged between first and second driving rollers 12a and 12b rotated by two mutually parallel driving shafts 11a and 11b, and a large number of micropores 14a dispersively arranged on an upper surface, a shutter 15 to close excess micropores of both end parts and an exhaust pipe 14b connected to a pressure reducing machine 16 on an under surface, are arranged in this suction box.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing device for processing a thin strip-shaped film base material, and to a drive roller of a transfer device for supplying the film base material.

[0002]

2. Description of the Related Art FIG. 3 is a side view of an example of a conventional drive roll. A strip-shaped thin film substrate 1 is fed from the right side in the direction of the arrow in the figure, and a drive roll is passed through a guide roll 4 for widening the inlet side. It is transferred by friction with the film base material 1 which is in contact with this peripheral surface along with the rotation of 2 and is transferred to the next step via the guide roller 3 on the outlet side.

In this case, the guide roll 3 is not only for changing the transport direction, but the film base 1 is in long contact with the peripheral surface of the drive roll 2 as shown in FIG.
It also has the effect of increasing the frictional force between the drive roll 2 and the drive roll 2.

[0004]

However, in the case of FIG. 3, as the drive roll 2 rotates, air is also entrained as shown by the white arrow in the figure, and the drive roll 2 and the film substrate 1 A thin air layer is formed between the drive roller 2 and the film base material 1 due to this air layer, and the sliding force occurs and the driving efficiency deteriorates.

Further, the film base material 1, which has been wrinkled by using the bending widening roll 4, may slip on the surface of the driving roll 2 and wrinkles may be generated again.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide a drive roll with good drive efficiency in which no air layer is generated.

[0007]

In order to solve the above-mentioned problems, in a drive roll for transferring a thin strip-shaped film base material 1, first and second drive shafts 11a, 11b which are rotated by mutually parallel drive shafts 11a, 11b are used. The suction box 14 arranged from below is provided between the second drive rolls 12a and 12b,
The suction box 14 has a large number of pores 14a dispersedly arranged on the upper surface thereof, a shutter 15 for closing extra pores 14a on the outer side of the pores 14a from both ends of the film substrate 1, and a pressure reducer on the lower surface. And an exhaust pipe 14b for connecting to 16.

[0008]

1 is an explanatory view of a drive roll with a suction box of the present invention, (a) is a side view (main part is a longitudinal sectional view), (b) is a plan view, and FIG. 2 is a suction box. It is an expanded sectional view of a part.

Drive rolls 12a, 12 rotated by two parallel drive shafts 11a, 11b rotated by a drive source 13
In b, the facing portions are arranged with some distance therebetween. The distance from the bottom to the height of the center of the first and second drive rolls 12a and 12b is about the entire width of the separated portion, and the first and second drive rolls 12a and 12b.
A suction box 14 that is inserted and arranged so as to approach the peripheral surface of b is provided.

A plurality of pores 14a are formed on the upper surface of the suction box 14 so as to be uniformly distributed, and an exhaust pipe 14b connected to the pressure reducer 16 is connected to the lower surface.

Further, in order to attach to the suction box 14 and to close the pores 14a in the extra portions from both ends to both ends of the film substrate 1 to be used, and to suppress the lateral position of the film substrate 1. Shutter 15 is provided.

Next, the operation of this device will be described.
As shown in FIG. 1, the film substrate 1 is supplied from a coating device or the like in the arrow direction, the traveling direction is changed by the widening roll 4, and the film substrate 1 is transferred along the peripheral surface of the first drive roll 12a, and then the second It is transported along the peripheral surface of the drive roll 12b, and finally the direction is changed by the guide roll 3 to change the direction.
Move in.

In this case, as shown in the drawing, the inside of the suction box 14 provided close to the first and second drive rolls 12a and 12b is decompressed by the decompressor 16 through the exhaust pipe 14b. The outside air is sucked through the pores 14a.

Moreover, since the suction box 14 and the peripheral surfaces of the first and second drive rolls 12a and 12b are in close proximity to each other, the amount of outside air sucked through this space is small, and the suction box 14 has a small amount. Since both ends of the upper surface are closed by the shutter 15 to both ends of the film base material 1, most of the outside air sucked acts to draw the film base material 1 passing thereover to the suction box 14 side. .

Further, the film substrate 1 and the first drive roll 12
The air sucked between a and a becomes an air layer to reduce the frictional force between the film substrate 1 and the first drive roll 12a, but the suction box 14 side is sucked by the pressure reducer 16, The frictional force is recovered, and a large amount of frictional force is generated on a considerable part of the peripheral surface of the contact portion.

No air is entrained from the space between the film base 1 and the upper surface of the suction box 14 which is already depressurized between the film base 1 and the second drive roll 12b, and no air layer is generated. Therefore, it will be driven by the original frictional force.

Further, the first and second drive rolls 12a, 1
Between 2b, since the film base material 1 is pulled toward the suction box 14 from the upper side, the contact pressure with at least the second drive roll 12b becomes large, and the frictional force further increases.

When the width of the film substrate 1 is changed, the shutter 15 is moved to fill the film width to close the extra pores 14a and to control the passage position of the film substrate 1. It also doubles as.

Further, since the bend type widening roll 4 as shown in FIG. 4 is used for the guide roll on the input side, by passing through the widening roll 4, even an extremely thin film substrate 1 can be filled to the full width. It is possible to prevent the occurrence of wrinkles due to the reduction of the frictional force in the front half portion on the peripheral surface of the first drive roll 12a which is widened and easily entrains the air layer.

[0020]

As described above, the extremely thin film substrate 1
Even in the case of, it is possible to secure a driving force by a sufficient frictional force.

Further, the widening roll 4 is provided as a guide roll on the input side.
By using, it is possible to prevent wrinkles that are likely to occur on the peripheral surface of the first drive roll 12a.

Further, by using the shutter 15, it is possible to close the excess pores 14a to secure the suction force and prevent the film base 1 from swinging laterally.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a drive roll with a suction box according to the present invention, in which (a) is a side view (a main part is a longitudinal sectional view),
(B) is a plan view.

FIG. 2 is an enlarged sectional view of a suction box portion of FIG.

FIG. 3 is a side view of an example of a conventional drive roll.

FIG. 4 is a perspective view of a widening guide roll (widening roll).

[Explanation of symbols]

 1 Film Substrate 12a First Drive Roll 12b Second Drive Roll 14 Suction Box 14a Pore 14b Exhaust Pipe 15 Shutter 16 Pressure Reducer 17 Drying Furnace

Claims (1)

[Claims] 1. A drive roll for transferring a thin strip-shaped film substrate, wherein a suction box disposed from below is provided between first and second drive rolls which are rotated by two mutually parallel drive shafts. , The suction box has a large number of pores dispersedly arranged on the upper surface, a shutter for closing extra pores on both sides of the film base from outside of the pores, and a lower surface for connecting to a pressure reducer. A drive roll with a suction box, comprising: