JPS6190159A - Cutting method of photosensitive paper - Google Patents

Abstract

PURPOSE:To eliminate the need for the marking for the determination of the cutting position of a hole puncher, etc., by detecting the front end position of beltlike photosensitive paper by a photosensor and stopping the feeding of the photosensitive paper when the photosensitive paper to be printed is cut. CONSTITUTION:When the rolled beltlike photosensitive paper 24 is fed to a pinch roller 28 and its front end part is positioned right under the photosensor 32, the photodetecting element of the sensor 32 detects reflected light and a motor which drives the pinch roller 28 is stopped with the signal of the sensor. At the same time, a rotary solenoid 62 is excited to set a guide bar 60 back to a position shown by a chain line, and a printing device 34 performs printing operation. The solenoid 62 is degaussed after the printing operation and the guide bar 60 is rocked to support the photosensitive paper 24 from below. Then, a cutting device 30 is put in operation to cut the photosensitive paper 24, and a solenoid 58 is excited to rocks a guide plate 52 to the position shown by the chain line, stacking cut sheets of photosensitive paper 24A in a stack box 50. Further, the sensor 32 detects no reflected light, so the pinch roller 28 begins to be driven again.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for cutting photographic paper when cutting photographic paper supplied in a strip shape and subjected to printing into sheets to be supplied to a sheet developing device. Regarding.

[Conventional technology]

Is it a roll of photographic paper in a photo printing machine? Unwind intermittently, starting from the tip? There is a type of paper feed type that allows printing to be done without any printing. In this type of printer, the photographic paper after printing is cut into strips 11 or each image frame and is supplied as a sheet to a subsequent developing device.

In FIG. 12, a strip of photographic paper 12 which has been subjected to printing by a printing device 10vc is cut off by a cutting device 14 to form a sheet of photographic paper 16, and this sheet of photographic paper 16. The rough estimate for feeding the sheet to the subsequent sheet developing device [18] is shown.

In the conventional photographic paper cutting method, a small hole is punched in the band-shaped photographic paper 12 by a hole puncher (not shown) at the location of the printing device 10, and this small hole is detected to determine the cutting position. . That is, the strip-shaped photographic paper 12 is pinched and fed by a pinch roller 20 driven by a motor (not shown). When the small hole reaches the position of the detection device 22, the detection device 22 detects the small hole and the signal can be transmitted to the motor.

The motor stops upon receiving the signal r, and at the same time the cutting device operates to cut the strip of photographic paper 12. This cutting position is approximately in the center between the image frame (although the stock has not appeared at this point) and the adjacent image frame. The sheet is then sent to the sheet developing device 18 through a middle stage (not shown).

[Problems that Honshu is trying to solve]

In the above-mentioned conventional cutting method, since it is essential to make a small hole using a hole puncher, the device configuration etc. become complicated. In addition, small holes remain in the product print, and although they are minute, they impair the appearance.

In consideration of the above-mentioned facts, the present invention aims to provide a method for cutting photographic paper that does not require marking to determine the cutting position using a hole puncher or the like.

[Means for solving problems]

In the method for cutting photographic paper according to the present invention, when it is detected that the leading edge of a strip of photographic paper has arrived, the feeding is stopped, and the photographic paper is cut by a cutting device disposed at a predetermined position. ing.

[Effect]

Since the leading edge of the photographic paper is the detected portion, marking for determining the cutting position is not required.

〔Example〕

FIG. 1 schematically shows an example of an apparatus for carrying out the photographic paper cutting method according to the present invention. In this example,
The strip-shaped photographic paper 24 is wrapped around a spool 26 to form a roll. The roll-shaped strip-shaped photographic paper 24 is placed on the tip side〃1
The paper is unwound from the paper and pinched and fed by a pinch roller 28 driven by a motor (not shown). The motor is brake 8! It is equipped with a mechanism so that the drive can be stopped instantaneously.

A cutting device 30 that is activated by being excited by a solenoid (not shown) is disposed below the pinch roller 28 on the @ side. On the downstream side of the cutting device 30, there is a reflective type 7-oto sensor 32.
is installed. The distance between the photosensor 32 and the cutting device 30 is equal to the cutting length of the strip of photographic paper 24, that is, the length of the desired sheet of photographic paper 24A minus the traveling distance of the strip of photographic paper 24. Note that the distance traveled means that the photosensor 32 is at the tip of the strip of photographic paper 24? This is the distance that the strip-shaped photographic paper 24 has traveled since the time of detection until it stops.

Below the middle between the pinch roller 28 and the cutting scissors [30],
34 is arranged in the baking device. The printing device 34 includes an exposure filter 36 including a light control filter (not shown), a negative carrier 40 that supports the negative 38, a magnifying lens 42, a group of cut filters 44, a shutter 46, and other accessories not shown. It is equipped with items, etc. negative carrier 4
The negative 38 supported by the negative 38 is cut so as to be wound from one spool 39A to the other spool 39B.

The image of the negative 38 irradiated by the exposure lamp 36 is magnified by the magnifying lens 42 so that it forms an image on the strip of photographic paper 24 between the very vicinity of the pinch roller 28 and the very vicinity of the cutting device 30. There is.

A chute 48-, which slopes downward toward the downstream side, is disposed below the cutting device 30, and a collection box 50 is disposed below the chute 48.

A temporary guide 52 made of transparent acrylic and extending upstream is disposed below the photosensor 32. guy r board 5
2 is pivotally supported at one end on the downstream side of the photosensor 32, and is connected to a rotary solenoid P58 via 54 and 56 gears. The guide P plate 52 is normally located directly below each line of the strip-shaped photographic paper 24, and is energized and swung to the position shown by the chain line.

A guide par 60 is disposed near the cutting device 30 at an intermediate portion between the cutting device 30 and the pinch roller 28 . One end of the guide rper 60 is attached to the plunger of the rotary solenoid P62 outside the longitudinal end of the strip-shaped photographic paper 24.

The guide holes 60 are normally located at the positions indicated by solid lines,
Although it is located directly below the strip of photographic paper 24 and is designed to support the photographic paper from below, the rotary line Lenoy P62 is excited and swings! It moves to the position shown by line 31 and retreats out of the optical path of the exposure lamp 36.

A motor (not shown) that drives the pinch roller 28 and a cutting device 30? A solenoid (not shown) that can be operated, a burning device 34 (shark 46 opening/closing device, etc.), and a guy P plate 52
The rotary line Lenoy P58 to be operated and the guide bar 6
0 is electrically connected to the rotary solenoid P62 that operates the rotary solenoid P62.

Next, the operation of this embodiment will be explained. The rolled photographic paper strip 24 is unwound from its leading end and fed by a pinch roller 28. At this time, the guy P plate 52 and the guide bar 60
The respective magnets P58 and 62 are not energized and are located as shown by solid lines in the figure. Band-shaped photographic paper 24
When the tip of the photo sensor 32 is located directly below the photo sensor 32, the light receiving element of the photosensor 32 detects the reflected light. Dipintero 228? The driving motor (not shown) is stopped, and the feeding of the strip of photographic paper 24 is stopped. At the same time, the rotary solenoid r62 is excited and the guide bar 60 is retracted to the position shown by the chain line.

The shutter 46 of the printing device 34 is then opened and the image of the negative 38 is printed onto the strip of photographic paper 24. The shutter 46 is closed and the printing is completed.

When a signal to close the shutter is issued from an opening/closing device (not shown) of the shutter 46, the solenoid P62 is demagnetized, the guide bar 60 swings, and the strip-shaped photographic paper 24 is supported downwardly. Cutting device 30 at the same time? A solenoid P (not shown) to be activated is excited, the cutting device is activated, and the strip of photographic paper 24 is cut. Note that the new leading end of the cut strip of photographic paper is supported by the guide bar 60 from below, so that it does not sag. Furthermore, the magnet P58 is excited, and the guide P plate 52 swings to the position shown by the chain line. With the operation of the guy P plate 52, the sheet-like photographic paper 24A is separated from the band-like photographic paper 24, and the cut end surface falls downward and contacts the chute 48, and then the corresponding end surface? The side opposite to the cut end surface as a shaft falls downward and is completely accommodated in the accumulation box 50.

When the sheet-shaped photographic paper 24A separated from the strip-shaped photographic paper 24 falls, the light receiving element of the 7-point sensor 32 detects reflected light? Since it is no longer detected, the motor is started by the signal and the pinch roller 28 is restarted. When the new tip of the strip of photographic paper 24 is located directly under the photosensor 32, the light receiving element of the photosensor 32 detects the reflected light sound, and the same operation as described above is repeated, and the sheet of photographic paper is placed in the collection box 50. A large number of 24A are accumulated. The stacked photographic paper sheets 24A are supplied to a subsequent sheet developing device (not shown). Note that the first sheet of photographic paper 24A has not been printed and is therefore discarded.

In this way, in this embodiment, the photosensor 32 is arranged,
Since the photosensor 32 detects the tip of the strip of photographic paper 24 and determines the cutting position, there is no need for any marking by hole punching or the like, which simplifies the device configuration and improves the appearance of the product print. There is no such thing as a loss.

Furthermore, the distance between the pinch roller 28 and the cutting device 30 corresponds approximately to the length of a printing frame, and the printing device *34 is arranged so that printing is performed on the strip of photographic paper 24 located in this area. , the length of the entire device is shortened.

〔Effect of the invention〕

As explained above, in the method of cutting photographic paper according to the present invention,
The device detects when the leading edge of the strip of photographic paper reaches the detected area, stops feeding, and cuts the photographic paper using a cutting device placed at a predetermined position. This has the effect of eliminating the need for marking.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an example of an apparatus for carrying out the photographic paper cutting method according to the present invention, and Fig. a2 is an example of an apparatus according to the conventional method. FIG.・ 24... Band-shaped photographic paper, 24A... Sheet-shaped photographic paper, 28... Pinch roller, 30... Cutting device, 3
2... Photo sensor, 34... Printing device.

Claims (1)

[Claims] (1) When obtaining a sheet of photographic paper by sequentially cutting off the printed parts from the photographic paper that is supplied in the form of a strip and is fed intermittently in the longitudinal direction to be sequentially printed, the tip of the photographic paper in the form of a sheet is A method for cutting photographic paper, comprising: detecting that the paper has reached the target, stopping the feeding, and cutting the photographic paper using a cutting device disposed at a predetermined position.