JPH061336B2 - Film transport device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a film transporting device that transports the leading end of a roll film in a predetermined direction.

(Prior Art) This type of device is widely used for easily using a cartridge containing a compact film, such as a microfilm retrieval device. In such a conventional apparatus, the roll film wound around the reel is rotated in the direction in which the tip of the film advances by the friction driving force of a belt or the like connected to the peripheral surface of the roll film, that is, the conveyance rotation. I am letting you. On the other hand, a friction wheel or the like as a tip peeling means that rotates in the direction opposite to the conveying rotation direction is brought into contact with the peripheral surface of the roll film to peel the tip portion of the film from the roll film, and this is brought close to the friction wheel. It is carried in a predetermined direction by being ridden on a carrying guide provided on the board.

In such a transporting device for feeding the film from the inside of the cartridge, when carrying a long distance, problems such as sagging of the film in a gap in the cartridge due to an increase in transporting resistance of the film and poor transport are likely to occur. . Therefore, generally, in a cartridge in which the leading end of the film is taken out from the inside of the cartridge, the film is surely conveyed to the front by a conveying means composed of a pair of rollers which are rotating in pressure contact.

[Problems to be Solved] However, in the above-described conventional apparatus, if the leading edge of the film is inclined in the direction of the film when entering the conveying roller that is the conveying means, skewing occurs, and the inside of the conveyed guide is Jam may occur. In order to solve this, it is necessary to regulate the approach direction to the transport roller, but this is difficult to design due to restrictions on the shape of the cartridge, and a countermeasure for it has been required.

[Means for Solving Problems] The present invention solves the above-described problems and enables the transfer pressure of the transfer unit that presses and transfers to be released, and the film front end passes through the transfer drive position of the transfer unit. It controls to carry by feeding the carrying pressure after detecting that the film has been carried to a predetermined position. The film peeled by the above-mentioned tip peeling means, the advancing means for rotating the roll film in the direction of advancing the tip of the film by friction, the tip peeling means for peeling the tip portion of the film from the roll film, A conveying means for conveying the film in a predetermined direction, a detecting means arranged at a predetermined distance from the conveying means for detecting the leading edge of the film, and at least a conveying hand. The guide means is provided between the step and the detecting means and guides the film in the normal conveying direction while regulating the position in the direction perpendicular to the film conveying direction, and the conveying means is the film front end of the detecting means. It is characterized in that it is set to apply a conveying pressure to the film surface after the detection to start the conveying operation.

(Embodiment) FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 is a microfilm, which is wound around a reel 2 in a roll shape and accommodated in a cartridge 3. A belt 4 as an advancing means is in contact with the peripheral surface of the roll-shaped film 1 under a predetermined pressure. The belt 4 is stretched between pulleys 6 and 7 provided at both ends of the arm 5 and is driven in the counterclockwise direction by a motor (not shown).
The film is driven to rotate the film forward in the direction of its leading edge.

On the upper part of the roll film 1, a peeling roller 8 for peeling the tip 1A of the film from the roll film 1 is in pressure contact with the roll film 1, and the peeling roller 8 is a driving roller 9
Receives a rotational force from the belt 10 through the belt. The drive roller 9 conveys the film 1 taken out from the cartridge 3 to the front, and in the case of the present embodiment, the surface is made of rubber having a high friction coefficient. Then, the film 1 is conveyed by pinching the film 1. The pinch roller 11 is rotatably attached to an arm 13 rotatable around a fulcrum 12, and is pressed against the drive roller 9 by a plunger 14 connected at one end of the arm 13. When the plunger 14 does not operate, it is separated from the drive roller 9 by the force of the tension spring 17 applied to the other end.

Reference numeral 15 denotes a transport guide as a guide unit that regulates the position of the film in a direction perpendicular to the transport direction to bring the film to a regular transport position, and has a tubular shape that regulates the vertical direction of the film. The width direction of the film, which is the direction perpendicular to the paper surface, is also restricted.

Reference numeral 16 is a sensor as a detection means for detecting the leading end of the film, and sends an input signal to the control means (not shown) as the film leading end 1A passes. The control means is accompanied by a plunger.
Control to turn on 14.

Next, the operation of this embodiment having the above-mentioned configuration will be described.

The film 1 is conveyed clockwise by driving the belt 4, and when the film leading edge 1A reaches the peeling roller 8, the film leading edge 1A is peeled from the roll portion by the peeling roller 8 and guided by the belt 10 into the guide 15. To be done. The situation at that time is shown in FIG. Figure 2 shows
It is the figure seen from the arrow A direction in FIG.

When the film 1 is tilted by an angle α with respect to the normal transport direction and approaches the drive roller 9, if the pinch roller 11 is pressed against the drive roller 9 in the conventional apparatus, the film 1 is transported with the direction tilted. Since pressure is applied, the film skews, and the leading edge 1A of the film is pressed against the guide 15 to hinder the running of the film, causing a jam.

On the other hand, in this embodiment, since the pinch roller 11 is released at this time, the leading edge 1A of the film is guided by the transport guide 15 to correct its direction, and as shown by the chain double-dashed line in FIG. Is conveyed in the direction of. Then, when the film front end portion 1A reaches the sensor 16, the plunger 14 is actuated by the control means according to the detection signal of the film front end from the sensor 16, whereby the arm 13 is rotated,
The film 1 is pinched between the pinch roller 11 and the driving roller 9. As a result, the transport pressure of the drive roller 9 is transmitted to the film 1, and the film 1 is transported.

In this way, since the transport pressure is applied to the film after the direction of the film is corrected, skew does not occur, and stable transport without jam occurs.

(Effects of the Invention) As described above, according to the present invention, the sensor for detecting the leading edge of the film is provided so as to be able to release the transport pressure of the transport means and to detect the leading edge of the film by a predetermined distance from the transport drive position of the transport means. Since the leading edge of the film reaches the position of the sensor after passing through the transport driving position and the traveling direction is determined during that time, the transport pressure is applied, so that a stable transport operation without skew can be obtained. Since the transport pressure is not applied to the film leading end, the film leading end is not damaged, and the film can be transported very smoothly.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an apparatus according to an embodiment of the present invention,
FIG. 2 is a perspective view A mainly showing the conveying means portion of FIG. 1 --- Roll film 1A --- Film tip 4 --- Advancing means (belt) 8 ---... Tip peeling means (peeling roller) 9,11 ... Conveying means (9 ... Drive roller, 11 ... Pinch roller) 15 ………… Guide means (guide) 16 ………… Detection means (sensor)

Claims (2)

[Claims] 1. A device for conveying a roll film in a predetermined direction after peeling the front end of the roll film, in which the roll film is brought into contact with the peripheral surface of the roll film, and the roll film is rotated in a direction of advancing the tip of the film by friction. Means, a leading edge peeling means for peeling the leading edge of the film from the roll film, a transporting means for transporting the film peeled by the leading edge peeling means in a predetermined direction, and a film disposed at a forward position by a predetermined distance from the transporting means. A detection means for detecting the leading edge of the film, and a guide means provided at least between the transportation means and the detection means for guiding the film in the regular transport direction while regulating the position in the direction perpendicular to the transport direction of the film. The conveying means is set so as to start a conveying operation by applying a conveying pressure to the film surface after the film leading edge of the detecting means is detected. That, the film transport device, characterized in that. 2. The film transporting apparatus according to claim 1, wherein the transporting means is a pair of rollers which transports the film under pressure when the transporting means is operated.