JPS63306154A - Roll film feeder - Google Patents

Abstract

PURPOSE:To enable accurate defined-dimension feeding by providing a first sub-roller between a film feeding reel and a first tension roller while providing a second sub-roller between a film receiving reel and a second tension roller. CONSTITUTION:When a first tension roller 2 and a second tension roller 5 are kept in a merely suspended condition by a film, the makes linear movement in the direction of the gravity simply by the weights of the tension rollers 2, 5. In this condition, the parts of the film before and after each tension roller are always in parallel and the tension applied to the film is constant. Hence, a first sub-roller 3 and a second sub-roller 6 are provided to keep the film before and after the first and second tension rollers 2, 5 in parallel. Thereby, although the diameters of the film are varied in accordance with the quantities of film remaining in a film feeding reel 1 and a film receiving reel 4, the film is not affected by this change in quantity, enabling accurate defined-dimension feeding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a roll film feeder having a structure with improved feeding accuracy and static position accuracy.

[Prior Art] Generally, flexible printed circuits (hereinafter referred to as FPCs) used in cameras, movie projectors, computers, etc., use polyester or polyimide films with a thickness of about 25 pm to 125 pm as the base material, and are rolled. It is stored rolled up. In its use, a roll film feeder is used.

FIG. 3 is a diagram showing a schematic configuration of a conventional roll film feeder, in which 7 is a projector that projects the pattern on the reticle 8 onto the FPC film 12, and inside it is a light source 9.
Optical system 10. It includes a projection lens 11 and the like. In addition, the FPC film 1 is attached to the film supply reel l.
2 and the spacer film 13 for preventing damage are wound overlappingly, so the spacer film is wrapped around another first glue 14.
Then, only the FPC film 12 is sent to the film receiving reel 4. FP sent to film receiving reel 4
C film 12 is another spacer film 3 for preventing damage.
It is rolled up and rolled up. This spacer film 13 may be brought from the first glue roll 14 or from a separate second glue roll 15.

The FPC film 12 is transported by a pair of pinch rollers 16 and a fixed size feed roller 17 driven by a stepping motor (not shown).
It is held at the same time as being fed by the fixed size feed roller 17. 18 and 19 are guide rollers that are generally provided as needed. Also, 2 and 5 are the first. Second
This tension roller is used to apply the necessary tension when feeding and receiving film.

In the configuration shown in Figure 3, feeding accuracy and FPC film 12
If the accuracy of the static position when the film is stationary is required to be high, the first
The film is fed and wound while the tension roller 2 and the second tension roller 5 move up and down at appropriate times to apply necessary tension so that the film does not slacken. At this time, it is ideal if the tension generated on the film supply side and the tension generated on the film winding side are constant, but they actually vary. When considering this on the film supply side, as the FPC film 12 is gradually supplied, this FP
As the winding diameter of the C film 12 changes, the first tension roller 2 rotates in an arc shape by the fulcrum 20 and the arm 21 that direct the first tension roller 2. The angle formed by the film portions A and A2 located at , constantly changes.

A similar phenomenon occurs at the second tension roller 5 on the winding side of the FPC film 12.

For this reason, the tension value of the FPC film 12 changes unstablely, causing a change in the "slip amount" when the fixed-size feed roller 17 is operated. On the other hand, when the sizing feed roller 17 is stopped, the positioning pin 30 is inserted into the perforation provided at the edge of the FPC film 12 to completely and accurately position the FPC film 12.
Either remove the friction of the sizing feed roller 17 after inserting the o into the perforation to some extent, or at this time, if a positional shift occurs due to the imbalance of tension, the etch of the perforation will be damaged, and the perforation will eventually expand. Accurate positioning is not possible.

[Problems to be Solved by the Invention] As mentioned above, in the conventional roll film feeder, the way the tension is applied to the film changes unstablely, which damages the perforations provided at the edge of the film, making it difficult to maintain accuracy. There were some problems, such as inability to position.

This invention was made in order to solve this problem, and it is possible to prevent a roll film from changing in the tension generated on the film supply side and the film winding side so that the way the tension is applied does not change. The goal is to provide leadership.

[Means for Solving the Problems] In order to achieve the above object, the roll film feeder of the present invention includes a first auxiliary roller disposed between the film supply reel and the first tension roller. The roller is held in a linearly movable state so that film portions A1 and A2 located before and after the auxiliary roller are parallel to each other, and a second auxiliary roller is provided between the film receiving reel and the second tension roller. , and the second auxiliary roller is held in a state where it can move linearly so that the film portions B1 and 82 located before and after the auxiliary roller are parallel to each other.

[Operation] With the above configuration, the first. The films A1 and A2 located before and after the second tension roller are parallel to each other, and the tension does not change depending on the position of the two tension rollers in the height direction. Further, although the film diameter changes depending on the amount of film remaining on the film supply reel or the film receiving reel, it is not affected by this amount of change.

[Embodiment] FIG. 1 is a diagram schematically showing the main parts of an embodiment of the roll film tweeter of the present invention, in which 3 is a first auxiliary roller, 6 is a second auxiliary roller, and a third auxiliary roller is shown. The same reference numerals as in the figures indicate the same or corresponding parts.

In FIG. 1, if the first tension roller 2 and the second tension roller 5 are simply suspended using a film, the tension rollers 2 and 5 will simply move linearly in the direction of gravity based on their own weight. do. In this state, the film portions before and after each tension roller 2, 5 are always in a parallel state, and the tension applied to the film is constant.

Therefore, in this embodiment, the first auxiliary roller 3,
A second auxiliary roller 6 is provided to keep the films in front and behind the first and second tension rollers 2 and 5 parallel to each other.

FIG. 2 is a diagram showing another embodiment of the present invention, in which 22 is a rail, 23 is a shaft of the first tension roller 2, and the first
The same reference numerals as in the figures indicate the same or corresponding parts.

As is clear from FIG. 2, the first tension roller 2
is arranged in an inclined state along a rail 22, and the first tension roller 2 is movable without sliding on this rail 22.

Therefore, the parallelism between the film portions A1 and A2 before and after the first tension roller 2 is maintained.

Although FIG. 2 shows the film supply side, it goes without saying that it may also be applied to the film receiving side.

Although the present invention has been described above for the above-mentioned applications that require a roll feeder with particularly high feeding accuracy, the scope of use is not limited to the above, and the present invention can generally be used for the use of films wound into rolls. Of course.

[Effects of the Invention] As explained above, the present invention includes a first auxiliary roller disposed between the film supply reel and the first tension roller, and a film portion A located before and after the auxiliary roller.
The roller is held in a state where it can move linearly so that A2 and A2 are parallel to each other, and a second auxiliary roller is arranged between the film receiving reel and the second tension roller, and the front and back of this auxiliary roller are Film portion B1 located at
The second auxiliary roller is held in a state where it can move linearly so that B2 and B2 are parallel to each other, so that the tension is kept constant on the film supply side and the film receiving side, respectively, and the film is fed by a fixed length. Even if slippage occurs during roller operation, the value remains constant, allowing accurate fixed-size feed. Furthermore, the contact state between the barb oration of the film and the pin can be maintained at a constant value at all times when the friction of the fixed-size feed motor is released, and the final positioning becomes accurate.

Therefore, it is possible to provide a roll film feeder with high feeding accuracy and high static position accuracy, which can be used for conveying printed circuit boards in FPC manufacturing. Of course, it can also be used to transport roll films for other purposes.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an outline of the main parts of one embodiment of the roll film feeder of the present invention, Fig. 2 is a diagram showing another embodiment of the invention, and Fig. 3 is a diagram showing the mechanism of a conventional roll film feeder. FIG. 3 is a diagram showing the configuration. In the figure. l: Film supply reel 2.5: Tension roller 3.6: Auxiliary roller 4: Film receiving reel 8 Ni reticle 12: FPC film agent Patent attorney 1) Haru Kitatake July 16, 1988

Claims (1)

[Claims] A first auxiliary roller is disposed between the film supply reel and the first tension roller, and the roller is capable of linear movement so that film portions A_1 and A_2 located before and after the auxiliary roller become parallel. At the same time, a second auxiliary roller is arranged between the film receiving reel and the second tension roller, and the second A roll film feeder characterized in that an auxiliary roller is maintained in a state capable of linear movement.