JPH0148546B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a negative sheet processing method, and more particularly to a method for processing a negative sheet having perforations that indicate the division of each item when the negative film is inserted.

In the developing laboratory, a printed negative film cut into strips is inserted into the pocket of a strip-shaped negative sheet, and when one negative film has been inserted, the negative sheet is subjected to subsequent cutting processing. Perforations are provided for convenience.

The perforated negative sheet is compared with the print in a collation step, and the portion of the negative sheet containing the print and the corresponding negative film is cut out and placed in a DP bag.
What is important here is that in processing the negative sheets as described above, each negative sheet is stopped at its cutting position in order to facilitate the operator's processing. In order to do this reliably, the perforations formed on each negative sheet may be accurately detected, and based on this, the negative sheet may be stopped at a convenient position for cutting.

However, since the negative sheet is made of a thin translucent material and the perforations are extremely thin slit-like, it can be used mechanically, electrically, or even photoelectrically as a difference in the amount of transmitted or reflected light. It was considered difficult to accurately detect it using standard methods. Particularly in the case of the photoelectric method, there is a problem in that the welded portion between the pockets of the negative sheet and the white strip for writing characters are erroneously detected.

An object of the present invention is to provide a negative sheet processing method that includes perforation detection suitable for processing negative sheets as described above and negative sheet feeding control based on the perforation detection.

The above-mentioned object of the present invention is to
In a method for processing a negative sheet with perforations that indicate classification of each case, a perforation opening member provided on the conveyance path of the negative sheet opens a portion corresponding to the perforation formed on the negative sheet, and this opening is opened by a photoelectron. the negative sheet is conveyed until the detected perforation reaches a cutting position and then stopped, and a cutting detection means provided at the cutting position detects that the negative sheet is cut at the cutting position. This is achieved by a negative sheet processing method characterized in that the conveyance of the negative sheet is controlled to be restarted when the negative sheet is conveyed.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view of a negative sheet processing section in a negative print collation machine showing one embodiment of the present invention. In the figure, 1 is a magazine that stores a long negative sheet 2 into which a negative film has been inserted, and 3 is a convex part that houses a light emitting part of a photoelectric detection device, which will be described later, and a transport part with a smaller diameter. The lower detection member 4 is an upper detection member having a fixing part incorporating a light receiving part of a photoelectric detection device, which will also be described later, and a transport part opposite to the transport part of the lower detection member 3. The lower detection member 3 constitutes perforation detection means for detecting perforations made on the negative sheet. Further, 5 is a negative sheet cutting detection means incorporating two photoelectric detection devices to be described later, 6 is a light table, and 7 is a cut bar.

FIG. 2 is a partially sectional side view showing details of the above-mentioned upper detection member 4 and lower detection member 3, and FIG. 3 is a plan view of the negative sheet 2 and the lower detection member 3 in a state where perforations of the negative sheet 2 are detected. It is. Further, FIG. 4 is a partially sectional side view showing details of the negative sheet cutting detection means 5 described above, and FIG. 5 is a plan view of the negative sheet 2 in a state where it is cut at perforations.

As shown in FIG. 2, the lower detection member 3
consists of a rubber drive roller 3A for conveying the negative sheet, and a convex portion 3B containing a built-in lamp 3D, which is fixed to a side plate of the apparatus (not shown) via a block 3C. Incidentally, above the lamp 3D, a lens 3E is provided so as to be flush with the surface of the convex portion 3B or to be slightly convex therefrom. Thereby, it is possible to prevent foreign matter such as dust from accumulating on the lamp 3D and causing a loss in the amount of light from the lamp 3D. Further, the upper detection member 4 facing this includes a press roller 4A pressed by a spring (not shown) against the drive roller 3A, and a light receiving element 4C fixed to the side plate of the device by a holding means (not shown). It consists of a fixed part 4B.

The drive roller 3A is driven by a motor whose drive is controlled by a control means (not shown) to convey the negative sheet 2. As is clear from FIG. 2, most of the width of the negative sheet 2 is held by the press roller 4A and the drive roller 3A and is conveyed normally, but a part of it (the left end in FIG. 2) is configured so that it rides on the protruding portion 3B of the lower detection member 3 and is conveyed while being deformed. In this case, the entire non-perforated portion of the negative sheet 2 is deformed and conveyed, but the portion corresponding to the perforated line 2A is wide open as shown in FIG. 3.

Next, details of the cutting detection means 5 for the negative sheet 2 will be explained based on FIGS. 4 and 5. As shown in both figures, the cutting detection means 5 for the negative sheet 2
is partially embedded in the light table 6, and includes two lamps 5A, 5B and two light receiving elements 5C, 5D, which constitute two sets of photoelectric detection devices.
and are held in the holder 5E so as to face each other with the negative sheet 2 in between. Two light receiving elements 5C, 5
The output of D is led to a comparator circuit, also not shown, via an amplifier circuit, not shown.

The operation of the apparatus of this embodiment configured as described above will be explained below.

The lamp 3D of the perforation detecting means and the lamps 5A and 5B of the negative sheet cutting detecting means 5 are turned on, and the corresponding light receiving elements 4C, 5C and 5D are respectively operated to transport the negative sheet 2.

First, to explain the operation of the perforation detection means, if there is a non-perforated part of the negative sheet 2 between the lamp 3D and the light receiving element 4C, the amount of light incident on the light receiving element 4C is relatively small, but the negative sheet When the perforation 2 comes, as mentioned above, the corresponding part of the perforation 2A is wide open, and as shown in FIG. 3, the incident light from the lamp 3D to the light receiving element 4C is not blocked at all. . Therefore,
An accurate perforation detection signal can be obtained from the output of the light receiving element 4C by setting a value close to this maximum amount of incident light as a threshold value.

The perforation detection signal thus obtained is sent to a control section (not shown). After receiving the perforation detection signal, the control section conveys the negative sheet 2 by a certain length and then stops it. As a result, the perforation corresponding to the perforation detection signal is located between the position of the cutting detection means 5 of the negative sheet and the cut bar 7.
It is also the position below the . - come to.

In this state, the outputs of the two sets of photoelectric detection devices of the negative sheet cutting detection means 5 are approximately equal. However, when the operator notices that the conveyance of the negative sheet 2 has stopped and cuts the leading portion of the negative sheet 2 from the perforation 2A, the light receiving elements of the two sets of photoelectric detection devices of the cut detection means 5 Only the output of the light receiving element 5D on the side corresponding to the cut negative sheet 2 suddenly increases, producing a clear difference from the other light receiving element 5C. The comparison circuit detects this condition and
It learns that the cutting of the negative sheet 2 has been completed and transmits this fact to the control section. Based on the signal, the control section conveys one negative sheet, that is, until the next perforation is detected. Then, when the next perforation is detected, the above operation is repeated.

In the above embodiment, the light receiving elements 5C and 5 of the two sets of photoelectric detection devices of the negative sheet cutting detection means 5 are
Although the completion of cutting is detected by comparing the outputs of D, it is also possible to detect the completion of cutting by detecting only the presence or absence of a negative sheet using one of the light receiving elements 5D.

In this case, the other light receiving element 5C can take on the following role. That is, as shown in detail in FIG. 6, the negative sheet 2 is usually provided with a white band 2C with a matte surface along the pocket 2B for writing the number of sheets to be reprinted. A negative film cut into every six frames is inserted into the pocket 2B. Therefore, if the white band 2C is detected by the light-receiving element 5C and the conveyance of the negative sheet is stopped when two or three white bands 2C are detected, the negative film is treated as a 12-exposure film. If it detects 4 or 5 white bands 2C and stops, it will be a 24-shot film, and if it detects 6 or 7 white bands 2C and stops, it will take a 36-shot film, and so on.
It is possible to make a distinction based on the number of negative films taken. This output can be used to print numbers and other symbols on the return paper bag (DP bag) to the customer to indicate how many shots the film contains. In addition, if for some reason the detection of the perforation 2A is not performed normally, in order to stop the transport of the negative sheet 2 and prevent trouble, for example, by the time the above-mentioned 8 white bands 2C are detected, If perforation 2A is not detected, negative sheet 2
It can also be controlled to stop the transfer of the water and issue an alarm.

In the above embodiment, a lamp was placed on the lower member of each photoelectric detection means, and a light receiving element was placed on the upper member. However, by selecting the light emitting wavelength of the lamp and the light receiving wavelength of the light receiving element, the effect of indoor light can be adjusted. It is also possible to arrange the lamp on the upper member and the light receiving element on the lower member so as not to receive the light.
Further, in the above embodiment, the lens 3E is provided above the lamp 3D, but the lens 3E is not used, and the lamp 3D itself is positioned so that the top thereof is connected to the convex portion 3.
It may be provided so as to be flush with the surface of B or to be slightly more convex than this. Furthermore, it is also possible to configure the convex portion 3B by a lamp 3D or a combination of a lamp 3D and a lens 3E.

In addition, in the above embodiment device, the lamp 3D
Although the convex portion 3B containing the convex portion 3B is assumed to be fixed, it goes without saying that it may be rotated so that the entire surrounding area emits light. Furthermore, as shown in FIG. 7, a similar effect can be achieved by providing a protrusion 8 on a portion of the linear conveyance path of the negative sheet.

After the perforation detecting means detects the perforation of the negative sheet, the control unit may drive the drive roller for a certain period of time when conveying the negative sheet by a certain length.

As described above, according to the present invention, in a method for processing a negative sheet having perforations to indicate the division of each item when inserting the negative film, the perforation opening member provided in the conveyance path of the negative sheet allows the negative sheet to be The part corresponding to the perforation made is opened, this opening is photoelectrically detected, and the negative sheet is conveyed until the detected perforation reaches the cutting position, and then stopped, and the cut made at the cutting position is When the detection means detects that the negative sheet has been cut at the cutting position, the conveyance of the negative sheet is controlled to be restarted. This has the remarkable effect that it is possible to realize a negative sheet processing method that can perform processing extremely efficiently.

[Brief explanation of drawings]

FIG. 1 is a side view of a negative sheet processing section showing an embodiment of the present invention, FIG. 2 is a partially sectional side view of a perforation detection means, FIG. 3 is a plan view of the same, and FIG. 4 is a negative sheet cutting detection means. 5 is a plan view of the same, FIG. 6 is a plan view showing details of the negative sheet, and FIG. 7 is a partially sectional side view showing main parts of another embodiment of the perforation detection means. It is. 1: Magazine, 2: Negative sheet, 2A: Perforation, 2B: Pocket, 2C: White belt, 3: Lower detection member, 3A: Drive roller, 3B: Projection, 3D:
Lamp, 3E: Lens, 4: Upper detection member, 4
A: Press roller, 4C: Light receiving element, 5: Cutting detection means, 5A, 5B: Lamp, 5C, 5D: Light receiving element, 6: Light table, 7: Cut bar,
8: Convex portion.

Claims (1)

[Claims] 1. In a processing method for a negative sheet having perforations indicating the division of each item when inserting the negative film, a perforation opening member provided in the conveyance path of the negative sheet opens the portion corresponding to the perforation formed on the negative sheet. , this opening is photoelectrically detected, and the negative sheet is conveyed until the detected perforation reaches the cutting position and then stopped, and the negative sheet is stopped at the cutting position by a cutting detection means provided at the cutting position. A negative sheet processing method, characterized in that when it is detected that the negative sheet has been cut, the conveyance of the negative sheet is controlled to be restarted.