JPS63109441A - Photographic printing device - Google Patents

Abstract

PURPOSE:To improve processing speed of the whole titled device by independently contacting/separating a pair of 1st holding/carrying rolls and a pair of 2nd holding/carrying rolls. CONSTITUTION:In case of cutting of a comparatively long piece from printing paper, the chip part of the printing paper is arranged so as to be passed over the 1st and 2nd holding/carrying rolls 46, 48 and 50, 52 immediately before cutting it by a cutter 34. Thereby, the 1st and 2nd rolls 46, 50 are respectively separated from the 1st and 2nd rolls 48, 52 by the action of solenoids 62, 68. When the printing paper 16C is cut off by the cutter 34, then the driving of the solenoids 62, 68 are stopped, the 1st and 2nd rolls 46, 50 are respectively pressed to the 1st and 2nd rolls 48, 52. Thereby the printing paper being cut is delivered to a space between holding/carrying rolls 72, 74 at low speed while being held between the 1st and 2nd rolls 46, 48 and 50, 52.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photographic printing apparatus for printing an image from a negative film onto photographic paper.

[Prior Art] A photographic printing apparatus generally takes out a roll of photographic paper and prints an image onto the photographic paper from a negative film.

Photo printing equipment not only prints images from negative film onto photographic paper, but also prints images onto photographic paper, then cuts the continuous photographic paper image by image with a cutter, and then cuts the photographic paper after cutting. Some are designed to be sent to the next processing device, such as a developing device.

In this case, in order to transport the photographic paper that has been cut into individual images by the cutter, the distance between the transport roller and the cutter, which is placed downstream of the cutter in the photographic paper feeding direction, must be shorter than the minimum image frame. Furthermore, the feeding speed of this conveyance roller is equal to the processing speed of the developing device. Therefore, although the printing speed in the image printing section can be faster than the processing speed in the developing section, the image is transferred to the cutter after printing an image larger than the minimum image frame. When conveying the paper, the leading end is pinched by the low-speed conveyance rollers, so the conveyance must be carried out at a low speed, resulting in a low processing speed of the entire apparatus.

[Problems to be Solved by the Invention] The present invention takes the above facts into account, and takes into consideration the fact that the printing of images onto photographic paper is easy, even when the photographic paper is later cut into various lengths for each image. It is an object of the present invention to obtain a photographic printing apparatus capable of rapidly processing photographic paper.

[Means for Solving the Problems] The present invention is a photographic printing apparatus that prints an image on photographic paper and then cuts the photographic paper into individual images by means of a photographic paper cutting means. A pair of first nipping conveyance rollers are arranged at a distance shorter than the minimum printable image frame size and are separable from each other; a pair of second pinching and conveying rollers that are arranged apart from each other by a distance shorter than the dimension and are separable from each other; the pair of first pinching and conveying rollers; and the pair of second pinching and conveying rollers
A driving means for independently moving the nipping conveyance roller toward and away from the conveyance roller is provided.

[Function] In the photographic printing apparatus having the above configuration, after printing an image from the negative film onto the photographic paper, the leading edge of the photographic paper sent downstream of the photographic paper cutting means is such that the size of the printed image on the photographic paper is equal to the size of the printed image on the photographic paper. If the paper is relatively short in the direction, it passes between a pair of first nipping and conveying rollers that are spaced apart from each other, and is cut into images by a photographic paper cutting means while being nipped by the pair of first nipping and conveying rollers. After cutting the photographic paper, a pair of first nipping and conveying rollers approach, immediately gripping the cut photographic paper and sending it at low speed to a pair of second nipping and conveying rollers and to the next processing device.

On the other hand, when the size of the printed image on the photographic paper is relatively long in the photographic paper feeding direction, the leading end of the photographic paper sent downstream of the photographic paper cutting means is connected to a pair of first It passes between the nipping and conveying rollers and between the second nipping and conveying rollers, and is cut into images at a shape 7t between the second nipping and conveying rollers and the next processing device. After cutting the photographic paper, a pair of first nipping and conveying rollers and a second nipping and conveying roller nip the cut photographic paper at low speed and send it to the next processing device.

Therefore, in the 1st burn area, the 1st. The photographic paper can be processed at high speed despite the slow feeding speed of the second nipping conveyance roller, and the photographic paper after cutting can be fed continuously to the developing device without leaving a large gap, so the entire device can be processed. Increases speed.

[Embodiment] FIGS. 1 to 3 show an embodiment of a photographic printing apparatus according to the present invention.

In the photo printing apparatus 10, as shown in FIG.
A printing table 14 is installed approximately horizontally in the center of the photographic paper 14, and a roll of photographic paper 16 is mounted on the printing table 14. The image is printed using a printing light.

A nipping conveyance roller 18, 20, 22 is installed at one end of the machine 2 (left end ?B in FIG. 1) adjacent to one end of the printing table 14 (left end in FIG. 1). . The nipping and conveying rollers 20 and 22 have one end supported by an arm 30 which is movably supported on a shaft 28 via a bracket 32 and the other end of the arm 30 . The arm 30 is biased by a tension coil spring 31 clockwise in FIG.

In this pinching conveyance roller 18, 20, 22, the pinching conveyance roller 18 is rotated by receiving the driving force of a motor 26, thereby pinching the leading end of the photographic paper 16 wound into a roll. Then, the photographic paper 16 can be fed onto the printing table 14 at a relatively high speed and mounted on the printing table 14. The motor 26 rotates forward and backward to rotate the photographic paper 16.
can be conveyed upstream and downstream, but the drive is stopped immediately after the photographic paper 16 is placed on the printing table 14, which prevents printing from a light source (not shown) on the printing table 14. The image is printed onto the photographic paper 16 using light. Further, the motor 26 is connected to the photographic paper 16.
After printing the image, start the drive again and print the photographic paper 1.
6 is fed downstream of the printing table 14 in the photographic paper feeding direction by one frame of the printed image, the drive can be stopped again. Therefore, image frames are continuously printed on the photographic paper 16.

On the other hand, the other end of the R stand 12, that is, the nipping conveyance roller 18
. It is located adjacent to 14. The cutter 34 is composed of a fixed blade 36 and a movable blade 38, and the movable blade 38 is moved in a direction perpendicularly across the conveyance path of the photographic paper 16 sent out from the printing table 14, and the cutter 34 cuts the photographic paper 16 together with the fixed blade 36. The photographic paper 16 can be cut by applying shearing force. The movable blade 38 is configured to be moved by receiving the driving force of a motor (not shown).

This motor feeds the photographic paper 16 on which the image has been printed on the printing table 14 downstream from the printing table 14.
It is activated when the printed image area reaches the downstream side of the cutter 34, that is, when the photographic paper 16 is moved downstream of the printing table 14 by one frame and the next image can be printed. This allows the photographic paper 16 on which images have been printed on the printing table 14 to be cut by the cutter 34 image by image.

However, if the image frame is small, the photographic paper 16
is fed larger than the image frame size, is cut, and is returned to the upstream side again to be printed adjacent to the cut end portion.

On this side, downstream of the ivy 34 in the photographic paper feeding direction, there is a photographic paper 1 cut by the cutter 34 as shown in detail in FIG.
First nipping conveyance rollers 46, 48 and second nipping conveyance rollers 50, 52 for sending out the photographic paper 6 to the developing device 44, which is another processing device, are arranged in sequence along the photographic paper sending direction.

The first nipping conveyance rollers 46 and 48 are installed at positions separated from the cutter 34 by a short distance slightly shorter than the length in the photographic paper feeding direction of the minimum printed image frame that can be printed from the negative film onto the photographic paper 16 on the printing table 14. After the photographic paper is cut by the cutter 34, a driving force is applied to the cut photographic paper between the cutter 34 and the first nipping conveyance rollers 4B and 48 so that the photographic paper can be conveyed regardless of the size of the printed image frame. It has become.

In these first nipping and conveying rollers 4B, 4B, one of the first
The nipping conveyance roller 46 receives the driving force of the motor 58 and moves at a relatively low speed (same speed as the photographic paper conveyance speed in the developing device 44).
It is designed to be rotated by The first nipping and conveying roller 46 is supported so as to be able to be separated from the first nipping and conveying roller 48 via a solenoid 62 that is part of a driving means. The solenoid 62 is energized and the first nipping conveyance roller 46
is moved upward in FIG. 2 and separated from the first nipping and conveying roller 48. This solenoid 62 is energized only when the motor 26 is driven, that is, only when the photographic paper 16 is being conveyed. A compression coil spring 60 is provided between the solenoid 62 and the first nipping/conveying roller 46, and presses the first nipping/conveying roller 46 toward the first nipping/conveying roller 48.

Therefore, the first nipping and conveying rollers 46 and 48
The first nipping conveyance roller 46 is separated from the first nipping conveyance roller 48 by the operation of the solenoid 62 until the photographic paper 16 is sent downstream of the cutter 34 and is cut by the cutter 34, and the photographic paper 16 is cut by the cutter 34. After that, the first nipping and conveying roller 46 is biased by the compression coil spring 60 and is immediately pressed against the first nipping and conveying roller 48 to apply a nipping and conveying force to the photographic paper 16.

The second nipping conveyance rollers 50, 52 are spaced apart from the first nipping conveyance rollers 46, 4B by a distance slightly longer by 1υ than the length in the photographic paper feeding direction of the minimum printed image frame that can be printed onto the photographic paper 16 on the printing table 14. This position makes it possible to reliably apply a driving force to the cut photographic paper 16 and transport it regardless of the length of the cut photographic paper. The second nipping and conveying rollers 50 and 52 are located at a distance slightly shorter than the length of the maximum printed image frame that can be printed on the printing table 14 in the photographic paper feeding direction from the cutter 34.

In the second nipping and conveying rollers 50 and 52, one of the second nipping and conveying rollers 50 is rotated at a relatively low speed (same speed as the photographic paper conveying speed in the developing device 44) under the driving force of the motor 64. It has become. The second nipping and conveying roller 50 is supported so as to be able to be separated from the second nipping and conveying roller 52 via a solenoid 68 that is another part of the driving means. The solenoid 68 is energized and the second nipping conveyance roller 5
0 is moved upward in FIG. 2 and separated from the second nipping and conveying roller 52. A compression coil spring 6 is provided between the solenoid 68 and the second nipping conveyance roller 50.
9 is provided to press the first nipping and conveying roller 50 against the second nipping and conveying roller 52 .

Therefore, the second nipping and conveying rollers 50, 52
4, when the image printed onto the photographic paper 16 is relatively large, the nipping conveyance roller 50 is moved until the photographic paper 16 is fed downstream of the cutter 34 and immediately before being cut by the cutter 34 for each image. Due to the operation of the solenoid 68, the photographic paper 16 is separated from the nipping conveyance roller 52, and the photographic paper 16 is moved to the cutter 3.
After cutting at 4, the nipping conveyance roller 50 is urged by the compression coil spring 69 and is immediately pressed against the nipping conveyance roller 52.

A printer 70 for printing on the back side of the photographic paper 16 is installed between the second nipping and transporting rollers 50, 52 and the first nipping and transporting rollers 46, 48.

A jam sensor 71 and a developing device il! are located downstream of the first nipping and transporting rollers 46, 48 and the second nipping and transporting rollers 50, 52 in the photographic paper feeding direction. Nipping and conveying rollers 72 and 74 provided at the entrance of 44 are arranged. The jam sensor 71 is designed to detect the leading edge of the photographic paper 16 sent out from the second nipping and conveying rollers 50 and 52, and cannot detect the arrival of the photographic paper 16 within a predetermined time after printing or after the cutter is activated. paper jam.

The nipping conveyance rollers 72, 74 are spaced apart from the cutter 34 by a distance greater than the length in the paper feeding direction of the maximum printed image frame that can be printed from the negative film onto the photographic paper 16 on the printing table 14. These nipping conveyance rollers 72 and 74 are connected from the second nipping conveyance rollers 50 and 52 by a distance slightly shorter than the length of the minimum printed image frame that can be printed from the negative film onto the photographic paper 16 on the printing table 14 in the photographic paper feeding direction. They are spaced apart so that driving force can be applied regardless of the size of the cut photographic paper. One side of the nipping and conveying rollers 72 and 74 is pressed toward the other by a biasing means (not shown), and one side is pressed against the developing mold F.
It is designed to be rotated at low speed by receiving the driving force of 1144.

Next, the operation of this embodiment will be explained.

When the burn start button (not shown) is operated, the motor 26
is driven, and the tip of the photographic paper 16 wound into a roll is transferred to the printing table 14 by the nipping and conveying rollers 18, 20° 22.
sent to the top. When the leading end of the photographic paper 16 is sent onto the printing table 14 and placed on the printing table 14, the motor 26
is stopped, the movement of the photographic paper 16 is stopped, and the image on the negative film is printed onto the photographic paper 16 by the printing light.

After the image is printed on the photographic paper 16, the motor 26 is driven again to send the photographic paper 16 downstream of the printing table 14. When the photographic paper 16 is fed downstream of the printing table 14 by the length of the printed image in the photographic paper feeding direction, the motor 26 is stopped again and the movement of the photographic paper 16 is stopped, so that the images on the photographic paper 16 are continuous. and burned. On the other hand, the printed photographic paper 16 sent downstream from the printing table 14 is cut into images by the cutter 34 when the areas between the printed images correspond to the cutter 34 .

FIG. 3 is an explanatory diagram showing the state of the photographic paper 16 before and after cutting in correspondence with the cutting length.

The solid lines in Figure 3 are 16A of photographic paper of each length.
- The position immediately before cutting 16c with the cutter 34, - The dashed line and the dashed-double line are the positions where each photographic paper continues to advance after cutting, and the broken line is the position where the leading edge of the next photographic paper is downstream from the cutter 34. Indicates the position of the leading photographic paper when it starts moving to .

When cutting the photographic paper 16 relatively short, that is, when the image printed on the photographic paper 16 is relatively short in the photographic paper feeding direction, the cutter 34 is used to cut the photographic paper 16 as shown in the photographic paper 16A and 16B in FIG. Photographic paper 16A just before being cut
, 16B pass the first nipping conveyance roller 46.48 and reach the front of the second nipping conveyance roller 50.52, so when the photographic paper 16A, 16B is sent after printing, the solenoid 62 is driven to The first nipping and conveying roller 46 is separated from the first nipping and conveying roller 48 to enable quick movement of the photographic papers 16A and 16B to the solid line position in FIG. 3 tFs. Immediately after cutting by the cutter 34, the driving of the solenoid 62 is stopped, and the first nipping conveyance roller 46 is brought closer to the first nipping conveyance roller 48 by the biasing force of the compression coil spring 60 to nip the photographic paper 16A, 16B, and then at a low speed. and the second nipping conveyance roller 5
Developing type F through 0°52! Send to 144. The photographic papers 16A and 16B are held by the first nipping conveyance rollers 46 and 4811!
Printing work is performed by the printer 70 while the paper is being held between the paper 7 and the second holding and conveying rollers 50 and 52. During this time, the photographic paper whose leading edge has been cut off is returned to the printing position at high speed and the printing process is performed. After the 0 image is printed, the above-mentioned process is repeated again, and the photographic papers 16A and 18B are returned to the solid line position. Move quickly and get disconnected. For this reason, the distance between the photographic paper after cutting is short (dimension D)! It is possible to continuously feed the toner to the developing device 44 while holding it.

In this case, the solenoid 68 is always stopped and the second solenoid 68 is stopped.
The nipping conveyance rollers 50.52 are the first nipping conveyance rollers 46.
48, the photographic paper 16A, 16B can be constantly held and conveyed. Therefore, even if the leading edge of the next photographic paper 16A, 16B begins to move downstream from the cutter 34 when the preceding photographic paper 16A, 16B that has already been cut by the cutter 34 reaches the position shown by the broken line in FIG. When the photographic papers 16A and 16B reach the solid line position n in Figure 3, the preceding photographic paper after cutting has already moved to the position indicated by the dotted chain line in Figure 3 and is ahead by the distance of the preceding photographic paper. 16A,
It does not overlap with 16B.

Next, a case where the photographic paper 16 is cut into a relatively long length, that is, a case where the image printed on the photographic paper 16 is relatively long in the photographic paper feeding direction will be described.

In this case, as shown in photographic paper 16C shown in FIG. Therefore, the first nipping and conveying roller 46 and the second nipping and conveying roller 50 are separated from the first nipping and conveying roller 48 and the second nipping and conveying roller 52, respectively, by the operation of the solenoids 62 and 68. Here, photographic paper 16C is cut with cutter 34! /J is cut, and if the driving of the solenoids 62 and 68 is stopped F after cutting, the first pinching conveyance roller 46 is pressed against the first pinching conveyance roller 48, and the second pinching conveyance roller 50 is pressed against the second pinching conveyance roller 52, respectively. Ru. Therefore, the photographic paper after cutting is fed at low speed between the nipping and transporting rollers 72 and 74 while being nipped by the first nipping and transporting rollers 46 and 48 and the second nipping and transporting rollers 50 and 52.

The leading end of the cut photographic paper 16c is held by the nipping conveyance roller 72.
74 and reaches the position shown by the broken line in FIG.
is sent downstream at high speed. At the same time, the first nipping and conveying roller 46 is separated from the first nipping and conveying roller 48, and the second nipping and conveying roller 50 is separated from the second nipping and conveying roller 52, so that the leading edge of the photographic paper 16C is already cut and advances. After forming a narrow gap (dimension D) with the edge of the photographic paper 16C, νI cutting is performed, and it is further nipped by the first nipping conveyance roller 46, 48 and the second nipping conveyance roller 50, 52, and then transferred to the developing device 44. sent to. Therefore, in this case as well, each photographic paper after being cut can be sent out while maintaining a narrow interval, and the processing speed of the entire apparatus is improved.

Note that in the above embodiment, two pairs of nipping and conveying rollers that can be gripped are provided between the cutter 34 and the developing device 44;
This nipping and conveying roller must be able to handle at least the maximum cutting length of photographic paper/
An integer set of minimum cutting lengths of photographic paper is required, and three or more sets may be provided as necessary.

[Effects of the Invention] As explained above, in the photographic printing apparatus according to the present invention, the photographic paper cutting means is arranged downstream of the photographic paper cutting means in the photographic paper feeding direction by a distance shorter than the minimum printable image frame size, and is provided so as to be separable from each other. a pair of first nipping conveyance rollers arranged downstream of the pair of first nipping conveyance rollers in the photographic paper feeding direction by a distance shorter than the minimum printing image frame size and provided so as to be separable from each other. Since it is provided with a second nipping conveyance roller and a driving means for independently moving the pair of first nipping conveyance rollers and the pair of second nipping conveyance rollers toward and away from each other, the image is printed onto the photographic paper. This method has an excellent effect in that even if the photographic paper is later cut into various lengths for each image, the photographic paper can be processed quickly in the printing section.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of a photographic printing apparatus to which the present invention is applied, FIG. 2 is a vertical cross-sectional view showing details of the section ■ in FIG. 1, and FIG. FIG. 7 is a flowchart of photographic paper showing an invoice IE. FIG. 10...Photographic printing device, 16...Photographic paper. 44--Developing device, 4B, 48--First nipping conveyance roller. 50.52...Second nipping conveyance roller. 62.68...Solenoid.

Claims (1)

[Claims] (1) A photographic printing device that prints an image onto photographic paper and then cuts it into individual images by a photographic paper cutting means, the distance being shorter than the minimum printable image frame size downstream from the photographic paper cutting means in the photographic paper feeding direction. a pair of first nipping and conveying rollers arranged so as to be separated from each other by a distance shorter than the minimum printable image frame size downstream from the pair of first nipping and conveying rollers in the photographic paper feeding direction; a pair of second pinching and conveying rollers that are arranged so as to be separable from each other; and a driving means that independently brings the pair of first pinching and conveying rollers and the pair of second pinching and conveying rollers toward and away from each other. A photo printing device characterized by: