JPH079149Y2 - Paper transport device for photo printing printers - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is designed so that, in a photo printing apparatus, an unexposed portion pulled out from a long roll paper set in a magazine is stored in a magazine after cutting. The present invention relates to a paper transport device for a photo printing printer.

<Prior art> In a photo printing apparatus using long printing paper,
The photo-printed paper is either sent to the paper phenomenon machine that is connected in sequence, or it is rolled up into a roll shape and set in another paper developing machine for development processing. It is often necessary to cut the printing paper halfway. In many devices, in consideration of the position of the paper tip after cutting, a cutter is provided immediately after the photo printing unit (exposure unit) to cut the paper, and the paper trailing end is sent to the above-mentioned developing sheet, and then left. Printing is continued from the tip of the paper after cutting.

However, when it is necessary to change the width of the paper or the type of paper for printing, open a part of the device to take out the magazine, and the unexposed part of the paper pulled out from the magazine will be exposed. After that, there was a drawback that the paper of this part was wasted. It is also conceivable that the operator may put a part of the device in a dark bag and return the pulled-out paper to the magazine by some method, but there is a problem that the in-groping work in the dark bag is very inefficient. .

<Problems to be Solved by the Invention> The present invention has been made in view of these points.
The purpose is to prevent waste due to exposure when the device is opened as described above, to avoid work in the state where a part of the device is in a dark bag, and of course, there is no hindrance to the printing (exposure) process. A predetermined unexposed portion of the printing paper (paper portion pulled out from the magazine) only by reversely operating a part of the conveying device without giving it and without complicating the device. It is an object of the present invention to provide a paper transporting device for a photo printing printer, which is capable of being returned to a magazine.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the paper transporting device of the printer for photographic printing of the present invention has a magazine 1 and a printing section 11 that includes a feed roller 5 that is driven by a motor and is capable of forward and reverse rotation. When the magazine 1 is attached to the apparatus 3, the pressure roller 6 is provided between the first and second positions, and the pressure roller 6 that cooperates with the supply roller 5 and is movable between the first position and the second position. The pressure roller 6 moves from the first position to the second position in a state where the printing paper 2 pulled out by a predetermined amount is sandwiched between the printing roller 2 and the supply roller 5, and the printing paper 2 is rotated in the forward direction at the second position. 2 is conveyed to the printing unit 11 and is sandwiched by the feed roller 13 and the leading edge of the printing paper is stopped according to the paper presence sensor. Then, the printing paper returns from the second position to the first position and is fed at the first position. When the magazine 1 is replaced, the supply roller 5 is set so that the loop of the printing paper 2 is formed by the forward rotation of the roller 5.
It is driven by a motor and is rotated in reverse to feed the printing paper 2 into the magazine 1 leaving the cut end portion (lead-out portion).

<Operation> When the magazine 1 is attached to the apparatus 3, the printing paper 2 is conveyed to the printing unit 11 prior to the printing operation, the leading end side of the printing paper 2 is nipped by the feed roller 13, and the printing paper 2 is Since the loop is formed, the printing (exposure) process can be performed smoothly without any problems. Further, when the magazine 1 is replaced, the supply roller 5 is driven by a motor to rotate in the reverse direction, so that the printing paper 2 is fed into the magazine 1 except for the cut end portion (leading end leading portion).

<Embodiment> The present invention will be described below with reference to the drawings. The drawing is a schematic explanatory view in which each part is simplified. Reference numeral 1 denotes a magazine which accommodates a printing paper 2 wound around a shaft 1a and which is detachable from an apparatus 3 and 4
Is a paper guide, 5 is a supply roller driven by a motor (not shown), 6 is a pressure roller, 7 is a pair of sensors for detecting the loop amount, 8 is a guide roller, and 9 is a paper presence sensor for detecting the presence or absence of the printing paper 2. ,Ten
Is a paper cutter, 11 is a printing unit, 12 is a paper presence sensor, 13 is a feed roller driven by a pulse motor, 14 is a pressure roller, 15 is a lens unit, and 16 is a negative film holding unit.

In such a structure, in the normal printing operation, the leading end of the printing paper 2 is slightly projected from the winding inside the manogazine 1 through the guide roller 1b. It is set by sandwiching it between the roller 5 and the pressure bonding roller 6, and the pressure bonding roller 6 is rotated counterclockwise (shown by a chain line) about the axis of the supply roller 5 with the sandwiched state, and when the supply roller 5 is driven, the printing paper 2 moves to the right. Is sent to (see reference numeral A). The printing paper 2 sent out passes between the guide roller 8 and the paper presence / absence sensor 9, passes through the paper cutter 10, and
When it is further sandwiched by the feed roller 13 and the pressure roller 14, this state is detected by the paper presence sensor 12 and stopped. In this state, the pressing roller 6 is rotated clockwise about the supply roller 5 to return to the initial position (solid line), and when the supply roller 5 is driven again, the printing paper 2 extends downward to form a paper loop. To be done. When the proper amount of the paper loop is detected by the pair of sensors 7, the driving of the supply roller 5 is stopped and the preparation for printing is completed.

Then, the image of the negative film (not shown) held in the film holding unit 16 is magnified by the lens unit 15, and the printing unit 11
Is printed on the printing paper 2. When printing is completed, the feed roller 13 connected to a pulse motor (not shown) rotates by one frame, and the next unexposed portion is carried into the printing unit 11. On the other hand, since the fluctuation of the paper loop is monitored by the pair of sensors 7, when the paper loop is reduced, the supply roller 5 is driven to feed the printing paper 2 at any time.

When it is desired to replace the magazine 1 while the printing operation is possible, the paper cutter 10 is operated to cut the printing paper 2. As a result, one of the printed portions is automatically fed to the developing section or the winding section, but the remaining unexposed portion of the printing paper 2 causes the supply roller 5 to rotate in the reverse direction and the paper guide 4 Magazine 1
When it is pushed into the inside (the shaft 1a of the magazine 1 does not rotate at this time), the paper loop disappears and the rear end portion (cut portion) passes through the paper presence sensor 9, it is detected and the feed roller is detected. The rotation stop of No. 5 is controlled, and the magazine 1 can be exchanged, leaving the leading end withdrawal section.

<Effects of the Invention> As described above, according to the paper transporting device of the photoprinting printer of the present invention, when the magazine 1 is attached to the device 3 without complicating the device, the printing paper is printed before the printing operation. 2 is conveyed to the printing unit 11 and the front end of the paper is securely sandwiched by the feed roller 13 and a loop of the printing paper 2 is formed so that the printing (exposure) process can be performed smoothly without any trouble. When the magazine 1 is replaced, the supply roller 5 is simply reversed, and the printing paper 2 has a predetermined amount.
It is quickly and surely sent inside and stored without difficulty. Therefore, it is possible to minimize the loss when exchanging the magazine.

Further, the feeding roller 5 used when the printing paper 2 is pulled out from the magazine 1 to form a paper loop is also used for rewinding when the magazine 1 is exchanged, and the feeding roller 5 is reversed so that the printing paper 2 is magazineed. Since it is fed into the magazine 1, the magazine 1 itself does not require a structure for rotationally driving the shaft 1a.

[Brief description of drawings]

The drawings are schematic illustrations showing an implementation order of the present invention. 1 …… magazine, 1a …… axis, 1b …… guide roller, 2 ……
Printing paper, 3 …… Device, 4 …… Paper guide, 5 …… Supply roller, 6.14 …… Crimping roller, 7 …… Sensor, 8…
… Guide roller, 9.12 …… Paper presence sensor, 10…
… Paper cutter, 11 …… Baking part, 13 …… Feed roller, 15 …… Lens part, 16 …… Film holding part.

Claims (1)

[Scope of utility model registration request] 1. A magazine which is detachably arranged in the apparatus and stores printing paper wound around a winding shaft, a loop forming section in which a paper loop is formed between the magazine and the printing section, and the magazine. A supply roller (5) arranged between the printing unit and driven in forward and reverse directions, a feed roller (13) arranged on the rear side of the printing unit and driven by a pulse motor, and cooperates with the rotation of the supply roller. In addition, a pressure roller that is movable between a first position and a second position, and that clamps the printing paper with the supply roller when moving from at least the first position to the second position, and the loop forming unit. And a paper cutter (10) disposed between the feed roller (13) and a paper cutter (10) disposed between the supply roller and the paper cutter to detect the leading edge of the printing paper. Equipped with presence sensors (9) and (12), when the magazine is attached, the pressure roller is moved to the second position and the feed roller is rotated normally to guide the printing paper to the printing unit side, and the printing sensor is operated according to the paper presence sensor. Stop the tip of the paper, return the pressure roller to the first position, and rotate the supply roller (5) forward to form the paper loop. When exchanging the magazine, cut the printing paper with a paper cutter. A paper feeding device for a photo printing printer, characterized in that the printing paper is fed into the magazine by reversing the supply roller (5).