JPH06115779A - Conveyer for film material - Google Patents

Abstract

PURPOSE:To realize safe and smooth conveyance of a very thin and wide film material by constituting a conveying roller by successively connecting a pair of large diameter disks in line with both ends of a small diameter disk, blowing fluid in an internal surface side of the film material, and applying energizing force toward the outside to the film material. CONSTITUTION:This conveyer has a conveying roller 10 constituted by connecting a pair of disks 11, 12 to both ends of a shaft 13, and by blowing fluid (pressure air or the like) to a part brought into contact of a film material F by a fluid blower 40 in an internal surface side of the film material F, energizing force toward the outside is applied to the film material F. The fluid blower 40 has a nozzle pipe 41 having a plurality of nozzles 42 arranged in parallel to the shaft 13 between both the disks 11, 12, to supply the fluid from a fluid source 44 via a flow regulating unit 43. In this way, the very thin and wide film material F of FPC material or the like can be smoothly conveyed in low tension further at a low speed without generating a flaw and dent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film material conveying device. In particular, it is used for smooth conveyance by minimizing the frictional resistance between the ultra-thin and wide film material and the conveyance roller.

[0002]

2. Description of the Related Art A film material conveying device for conveying a film material in a predetermined direction using a plurality of conveying rollers is widely used. As shown in FIG. 5, the conventional conveying roller (10P) has a columnar or cylindrical shape made of a synthetic resin such as vinyl chloride or a metal material such as stainless steel, and has a width Wp.
It is formed so as to be brought into full contact with the film material F.

Therefore, the contact surface of the film material F may be scratched or dented during the transportation, depending on the condition of the peripheral surface of the transportation roller 10P, the tension applied to the film material F, and the material of the film material F. There is. That is, in many film materials F, the guide surfaces Fg, F whose width is [(Wp-Wa) · 1/2] on both sides of the full width dimension Wp.
g is provided, and the inside of the effective width Wa is the product target surface. For this reason, the scratches on the guide surfaces Fg, Fg are not a serious problem, but the scratches on the product surface result in poor quality.

By the way, the film material is FPC (Flexible Printed Circuit) shown in FIG.
(it) In the case of the material 100, the FPC material 100 is formed by depositing an ultrathin (for example, 1 μm) copper foil 101 on a very thin (for example, 25 μm) polyimide resin film 102, or by depositing the resin 102 on the copper foil 101. It is formed by coating. Further, in preparation for the FPC completion process, the resist 102R for the resin 102 and the copper foil 101
A resist 101R for coating is applied. Even when the resists 101R and 102R are integrally formed, the total thickness is about 100 μm.

Incidentally, as the completion process, for example, an exposure and etching process of the resist 101R, a large number of electric circuits 11
The plating step for forming the pattern 110 composed of 1,111, the exposure step for the resist 101R, and the step for forming the bonding hole 102H including etching are included. Thus, the completed FPC is often in the form shown in FIG. 6 (B).

In such an ultra-thin FPC material 100, for example, the tension must be 300 g and the speed must be 0.3 to 1.0 m / min. Therefore, if the contact area between the carrying roller 10P and the film material F is increased, An increase in frictional resistance causes a situation in which the conveyance is stopped. Thus, conventionally, the width Wp is limited to, for example, 35 mm or less. According to this limitation, as shown in FIG.
Only one row of patterns 110 can be formed. In other words, as shown in (B), if the FPC material 110 (F) having a wide width W capable of forming a plurality of patterns 110 in parallel and having a width of, for example, 250 mm can be smoothly transported,
It is clear that the productivity and quality of can be greatly improved.
Further, since the effective utilization rate of the film material F is increased, the cost can be reduced. The same applies to the film material F used for other purposes.

Here, in order to enable continuous conveyance of the wide (W) film material F shown in FIG.
The new conveying roller 10 shown in FIG. 3 was created, and the experiment was repeated. The transport roller 10 is a target film material F.
Pair of discs 1 in contact with both guide surfaces Fg, Fg
1, 12 and the two disks 11, 12 are connected so that they can rotate synchronously, and are in non-contact with the effective width dimension Wa.
And a connecting shaft 13 having a diameter smaller than 12. That is, the step S shown in FIG. 4 is provided in the radius between the disks 11 and 12 and the shaft 13. According to this
Since the product surface having the effective width dimension Wa is not scratched or dented and the frictional resistance can be minimized, the product can be conveyed even with a low tension of 300 g, for example. Therefore, the material yield is high and the cost can be reduced.

[0008]

However, it is difficult to say that it is effective for all of the various film materials F. A problem occurs as the film material F becomes much thinner and wider. That is, even if the central portion of the film material F bends and comes into contact with the shaft 13, and once it comes into contact with the shaft 13 and is not scratched or dented, frictional resistance may increase and conveyance may be defective. is there. On the other hand, the step S
When the value is made very large, the sagging amount of the central portion due to the bending of the film material F increases in proportion to the size of the step S, so that the film thickness varies in the case of plating, for example. In the worst case, the guide surface Fg is the disk 11 (12).
There is also a risk that it will come off.

In particular, when the film material F is the above FPC, as shown in FIG. 4, due to complicated circumstances such as the elongation rate of the resist 102R (101R) being larger than that of the material 100, warpage occurs and that portion is the shaft. It sticks to 13. Then, the other portion is drawn into the closely contacted portion, and bending wrinkles and cracks that are plastically deformed are generated, resulting in a defective product as a whole.

An object of the present invention is to provide a film material transporting device capable of smoothly transporting an ultrathin and wide film material at low speed and low tension without causing scratches or dents.

[0011]

The present invention skillfully utilizes the characteristics of the extremely thin and wide film material, which is a factor causing the above-mentioned problems, that is, low rigidity and light weight, and flexes the film material during conveyance. The above-mentioned object is achieved by the structure in which the drooping due to is corrected by spraying a fluid from the inner surface side.

That is, the film material conveying apparatus according to the present invention is a film material conveying apparatus for conveying a film material in a predetermined direction using a plurality of conveying rollers, wherein the conveying rollers are in contact with both side ends of the film material. It is composed of a pair of large-diameter discs and a small-diameter shaft that connects both discs concentrically and rotatably synchronously, and blows fluid on the inner surface side of the film material guided by both discs and in the part not in contact with both discs. In addition, a fluid spraying device is provided to apply a biasing force to the film material toward the outside.

[0013]

According to the present invention having the above-mentioned structure, the outer edge of the film material is guided by the both disks of the transport roller so as to be transported. Then, the smaller the rigidity of the film material, the more the central portion not in contact with the disc and the shaft tends to hang down in the shaft direction. However, in this non-contact part,
Since the fluid from the fluid spraying device is sprayed from the inner surface side, the sagging due to the bending of the film material does not occur. Therefore, since the film material and the shaft are held in a non-contact state, the frictional resistance does not increase, smooth transport can be performed with low tension, and bending or the like can be eliminated.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the present film material transporting device comprises a transporting roller 10 formed of a pair of disks 11 and 12 and a shaft 13 connecting them, and a fluid A is sprayed onto a non-contact portion of the film material F. The fluid spraying device 40 is provided so that the ultrathin and wide film material F can be smoothly conveyed at low tension and low speed.

Further, in this embodiment, as shown in FIG. 2, three transport rollers 1 are provided in a double tank 1 containing the treatment liquid Q.
The film material F is conveyed in the Y direction using 0, 20, 30 and the two driven rollers 15, 25.

Here, the film material F is the FPC 100 (101, 102) described in FIG. 6 and has a thickness of 50 μm.
The width W is as thin as m, and the width W is as wide as 250 mm so that 3 to 10 or more patterns 110 can be formed in parallel depending on the pattern width as shown in FIG. 7B. The tension is set to 300 g at a conveying speed of 0.5 m / min.

As shown in FIG. 1, the transport roller 10 includes a pair of large-diameter disks 11 and 12 which can contact the guide surfaces Fg, Fg at both ends of the film material F, and both disks 1.
It is composed of a small-diameter shaft 13 that connects 1 and 12 concentrically and rotatably synchronously. Therefore, the effective width dimension Wa excluding the guide surfaces Fg, Fg with respect to the width dimension W of the film material F can be used as the product target surface, so that the material yield is large. Of course, the target surface of the product is disk 1
There is no contact with either 1, 12 or the shaft 13.

Here, the large-diameter disks 11 and 12 mean a disk-shaped collar body having a diameter not less than the allowable bending diameter of the film material F. The small-diameter shaft 13 naturally has a smaller diameter than the large-diameter disks 11 and 12, and has the smallest diameter as long as it has mechanical strength capable of connecting the disks 11 and 12 in a synchronously rotatable manner. Therefore, the rotational resistance load on the bearing (not shown) is reduced.

The carrying roller 5 (disks 6, 7, shaft 8) in FIG. 1 is arranged upstream of the carrying roller 10. Further, the transport roller 20 shown in FIG.
The (disks 21, 22 and shaft 23) and 30 (disks 31, 32 and shaft 33) are also conveyed by the transport roller 10 (1
1, 12, 13) and the same structure.

Next, the fluid spraying device 40 is used for both discs 1.
The fluid A is sprayed on the inner surface side of the film material F guided by the contact points 1 and 12 and not in contact with both the disks 11 and 12 to apply a biasing force to the film material F toward the outside.
In this embodiment, the shaft 1 is provided between the disks 11 and 12.
3, a nozzle tube 41 having a plurality of nozzles 42 arranged in parallel with each other, a flow rate adjusting unit 43, and a pressurized fluid source 44. Although the fluid A is air, it may be a liquid (eg, water) when the film material F is left in the atmosphere for a short period of time.

The ejection amount from the nozzle 42 is determined by the film material F.
Is selected so that the non-contact portion (the portion within the effective width dimension Wa) of can be matched with the outer diameter of both disks 11, 12. The nozzle 42 at the center of the nozzle tube 41 may have a relatively large diameter, the nozzle 42 on the disk 11 (12) side may have a small diameter, or the nozzle pitch at the center may be smaller than that at the outside.

The spray angle (θ) of the fluid A is not particularly limited as long as the above requirements are satisfied, but in this embodiment, the film material F resists the resist 101R on the FPC element 100.
Based on the experience when (or 102R) is applied, the angle θ is set to 45 degrees as shown in FIG. This is because the film material F is most severely wrinkled.

Next, the operation of this embodiment will be described. As shown in FIG. 2, the film material F is attached to each of the transport rollers 10 and 2.
0 and 30 and the driven rollers 15 and 25 are stretched and conveyed in the Y direction.

For example, the flow rate adjusting unit 43 is operated so that the bending of the film material F on the conveying roller 10 is visually confirmed and the non-contact portion of the width dimension Wa becomes parallel to the outer diameters of the disks 11 and 12. . That is, the film material F
The fluid A is sprayed from the inner surface side of the to correct the bending of the non-contact portion. The other transport rollers 20 and 30 are adjusted in the same manner.

Therefore, since the non-contact portion does not come into contact with the shaft 13, the film material F can be guaranteed to have high quality without being wrinkled, scratched or dented. Since the frictional resistance does not increase, it can be transported stably even at low tension.

However, according to this embodiment, the conveying roller 10 is provided with a pair of large-diameter disks 11 and 12 and both disks 1.
2 is formed from a shaft 13 concentrically and rotatably connected to each other in a synchronous manner, and a fluid spraying device 40 that applies an outward biasing force to the film material F is provided, and slack in the shaft 13 direction due to bending of the film material F is corrected. Since it is configured to maintain the non-contact state of the non-contact portion, even an ultra-thin and wide film material F can be smoothly conveyed at low tension and low speed, and high quality in which creases, scratches and dents are removed The productivity and productivity can be significantly improved, and the cost can be reduced by improving the material yield by increasing the non-contact portion.

Since the outer diameters of the large-diameter disks 11 and 12 correspond to the allowable bending diameter of the film material F, the film material F is not stressed or cracked.

Further, since the outer diameter of the small-diameter shaft 13 is set to the minimum diameter as long as both the disks 11 and 12 can be synchronously rotated, the inertia and rotation resistance of the entire conveying roller 10 are small and power consumption is low. The cost can be reduced as well as the structure can be simplified.

Further, since the fluid spraying device 40 is provided with the flow rate adjusting unit 43, it can be operated in accordance with various film materials F and has wide applicability.

[0030]

According to the present invention, the conveying roller is formed of a pair of large-diameter discs and a shaft connecting the two discs concentrically and synchronously with each other, and a fluid for applying an outward biasing force to the film material. A spraying device is provided to correct the slack in the shaft direction due to the bending of the film material and maintain the non-contact state of the non-contact part, so even ultra-thin and wide film materials can be smoothly conveyed at low tension and low speed. In addition, it is possible to significantly improve the high quality and productivity in which the habits, scratches, and dents are eliminated, and the cost is reduced by improving the material yield by increasing the non-contact portion.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part showing an embodiment of the present invention.

FIG. 2 is likewise an overall configuration diagram.

FIG. 3 is a diagram for explaining a carrying roller that was experimentally tested according to the creation of the present invention.

FIG. 4 is also a diagram for explaining a problem.

FIG. 5 is a diagram for explaining a conventional example and its problems.

FIG. 6 is a vertical cross-sectional view illustrating an example of a film material of the present invention and a conventional example.

FIG. 7 is likewise a plan view.

[Explanation of symbols]

 10 Conveyor Roller 11, 12 Large Diameter Disc 13 Small Diameter Shaft 20, 30 Conveyor Roller 40 Fluid Spraying Device 41 Nozzle Tube 42 Nozzle 43 Flow Rate Adjustment Unit 44 Fluid Source F Film Material Fg Guide Surface (Side Edge) Wa Effective Width Dimension (Non-contact) part)

Claims (1)

[Claims] 1. A film material transporting device for transporting a film material in a predetermined direction using a plurality of transport rollers, comprising: a pair of large-diameter discs which are in contact with both side edges of the film material; And a small-diameter shaft that is rotatably connected in synchronism with each other, and the fluid is sprayed on the inner surface side of the film material guided by both discs and in the part not in contact with both discs, and the urging force is directed outward to the film material A film material conveying device, characterized in that it is provided with a fluid spraying device.