JP2002031865A - Processing defect detector for film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the fluctuation of the end faces of films at all times and to surely discard the films having processing defects. SOLUTION: This device has a sprocket member 42 which engages perforations 3a and 3b of the photographic film 1 and of which a flank 40 is arranged inner than the end face 2a of the photographic film 1 and an end face detecting mechanism 44 which abuts the end face 2a projecting outward from the flank of this sprocket member 42 and continuously detects the fluctuation of the end face 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film processing defect detecting apparatus for inspecting whether or not a distance between a perforation position provided on a film and an end face position of the film is within a specified value.

[0002]

2. Description of the Related Art In a process of manufacturing a photographic film, for example, a 35 mm (135 size) photographic film, a rolled raw material is sent out, and a perforation is formed on the raw material, and if necessary, a plurality of films are formed. After being cut into books, trimming (cutting) is performed for each length corresponding to a predetermined number of shots.

As shown in FIG. 6, in a photographic film 1 manufactured as described above, perforations 3a, 3b are formed at a constant pitch in the length direction (arrow X direction) at the edges of both end faces 2a, 2b. Have been. This photo film 1
According to the ISO standard, the size of each part, for example, the width dimension A,
In addition to the pitch interval B, the prescribed dimensions of the distance E between the outer end portions of the perforations 3a and 3b and the end surfaces 2a and 2b are set in advance, and the photographic film 1 in which these values are not within the set values is not acceptable. It will be discarded as a good product.

[0004] For this reason, in general, a photographic film 1 manufactured at a rate of about once per day during the manufacturing process.
Is taken out by a sampling inspection, and a pass / fail judgment inspection for the taken out photo film 1 is performed manually by an operator.

[0005]

However, since the quality of any photo film 1 is determined by sampling inspection, the quality of all the photo films 1 to be manufactured is sequentially determined during the manufacturing process of the photo film 1. There is a possibility that the photo film 1 which cannot be detected reliably and which is out of specification is conveyed as a non-defective product to the next step to produce a defective product.

Further, if it is determined by the sampling inspection that a processing failure has occurred in the photographic film 1 during the manufacturing process, a large amount of the photographic film 1 must be discarded as a defective product. It has been pointed out that it is not economical and not efficient.

The present invention solves this kind of problem, and can sequentially and accurately detect the quality of each photographic film to be manufactured, and can quickly and economically detect only high-quality photographic films. It is an object of the present invention to provide a film processing defect detection device that can be obtained.

[0008]

In the film processing defect detecting apparatus according to the present invention, at least one side surface of a sprocket member which engages with a perforation provided on the film is disposed inside the end surface of the film. The end face detecting mechanism is brought into contact with the end face of the film, and the fluctuation of the end face of the film is automatically detected. As a result, during the processing of the film, a change in the distance between the perforation position and the end face position can be always detected for all the films, and the work for detecting the defective processing of the film can be reliably performed. Therefore, unlike the sampling inspection, a large number of defective products are not generated, and the film can be economically and efficiently manufactured.

Further, in the present invention, the end face detecting mechanism includes a detection dog member which can swing freely by contacting the end face of the film, and the displacement of the detection dog member is detected by a sensor. As a result, a change in the end face of the film can be detected with a simple configuration and with high accuracy.

Further, in the present invention, the film is cut into three slits, a first sprocket member and a first end face detecting mechanism are arranged on one end face side of the first slit, and a second sprocket member is provided. A second end face on the other end of the slit
And the second end face detection mechanism are arranged, thereby making it possible to detect all processing defects of the three films. This is because the width dimension of the web before slitting, the mounting accuracy of the slitting cutter itself, and the like are set in advance. For this reason, the configuration of the entire processing defect detection device is effectively simplified and economical.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic structural explanatory view of a film processing machine 12 in which a film processing defect detecting device 10 according to an embodiment of the present invention is incorporated.

The film processing machine 12 is provided with a roll feeder 14 for feeding a raw material wound into a roll, and a photographic film 1 for three perforations 3a and 3b on the raw material fed from the roll feeder 14. 1
a piercing device 16 for piercing according to a, 1b and 1c)
A cutting device 18 for cutting the raw material into three slits;
A trim device 20 that cuts and trims the cut three slits for each predetermined number of images, and a photo film conveyed in the direction of arrow Y at predetermined intervals as shown in FIG. In this embodiment, one of the photo films 1a (first film) is arranged on one slit end surface 2a side of the photo film 1a (first film) and the other slit end surface 2b of the photo film 1b (second film) among 1a, 1b and 1c. And a conveyance path headed in the direction of the arrow Y via the conveyance device 24.

As shown in FIG.
A sorting device 26 for sorting non-defective products and defective products based on the detection result is provided on the downstream side of. On the downstream side of the sorting device 26, a winding device 28 for processing non-defective products and an NG accumulating device 30 for discharging defective products are provided.

As shown in FIGS. 3 and 4, the processing defect detecting device 10 includes a photographic film 1 (1a, 1b and 1c).
And a sprocket member 42 having at least one side surface 40 disposed inwardly of the end surface 2a of the photographic film 1, and a sprocket member 42 disposed outside the side surface 40 of the sprocket member 42. And an end face detecting mechanism 44 which abuts on the end face 2a of the photo film 1 projecting therefrom and detects a fluctuation of the end face 2a of the photo film 1.

In the sprocket member 42, the interval between the teeth 46a and 46b meshing with the perforations 3a and 3b is set to be larger than the interval between the teeth of the sprocket member 42 which is usually used when transporting the photographic film 1. (For example, about 0.1 mm), the play between the perforations 3a, 3b and the teeth 46a, 46b is reduced to improve the detection accuracy.

In the sprocket member 42, the distance C between the outer end face of the tooth portion 46a and the side face 40 is determined by the outer end face and the end face 2a of the perforations 3a and 3b of the photographic film 1.
The end face 2a of the photographic film 1 always projects outward from the side face 40.

The end face detecting mechanism 44 has a fixed base 48,
A support table 51 containing a pair of bearings 50 is fixed to the distal end side of the fixed base 48, and a detection dog member 52 is swingably supported via the bearings 50. One end 52a of the detection dog member 52 is always in contact with the end face 2a of the photo film 1, and a detection unit 54 is provided on the other end 52b side of the detection dog member 52. The fixed base 48 has a detection dog member 52 facing the detection unit 54.
Is mounted.

One end of a spring 58 is engaged with the detection dog member 52 on the other end 52b side, and the other end of the spring 58 is supported by the fixed base 48. The spring force of the spring 58 is 0.4N to 0.8N, more preferably 0.4N.
０．６0.6N. Spring force is 0.8N
With the above, the end face 2a of the photographic film 1 may be damaged. On the other hand, when it is less than 0.4 N, the detection dog member 52 may vibrate and a detection failure may occur. In the present embodiment, the spring force of the spring 58 is set to 0.5N, so that damage to the end face 2a is reduced as much as possible.

Stoppers 60a and 60b are provided on the fixed base 48 so as to adjust the protruding position in order to regulate the swing range of the detection dog member 52.

The processing defect detecting device 1 configured as described above.
Operation 0 will be described below in relation to the film processing machine 12.

As shown in FIG. 1, in the film processing machine 12, a raw material is fed through a roll feeding device 14. Perforations 3a and 3b are formed on the raw material via the perforation device 16 by three sets, that is, corresponding to three slits. The raw material after perforation is cut by a cutting device 18.
Through 3 slits. Further, under the operation of the trimming device 20, cutting and trimming are performed for each length corresponding to a predetermined number of photographed images, and the photographic film 1 is cut.
a, 1b and 1c are formed (see FIG. 2).

The photographic films 1a, 1b and 1c are conveyed in the direction of arrow Y in parallel with each other, and the photographic films 1a and 1b are directly detected by the processing defect detecting device 10 (steps S1 and S2 in FIG. 5). ). In the photo film 1a, as shown in FIGS. 3 and 4, the sprocket member is in a state where the perforations 3a, 3b of the photo film 1a are engaged with the teeth 46a, 46b of the sprocket member 42 constituting the processing defect detection device 10. 42 rotates.

At this time, the side surface 40 of the sprocket member 42
C is set smaller than the distance E from the perforation 3a of the photographic film 1a to the end face 2a, and the end face 2a protrudes outward from the side face 40. The end face 2a is in contact with one end 52a of a detection dog member 52 constituting the processing defect detection device 10, and the one end 52a is connected via a spring 58 which engages with the other end 52b of the detection dog member 52. It is pressed against the end face 2a.

For this reason, one end 52a of the detection dog member 52
Is constantly in contact with the end face 2a of the photographic film 1a, and a change in the end face 2a is directly transmitted to the detection dog member 52. The detection dog member 52 includes a bearing 50
And the detection unit 54 provided at the other end 52b of the detection dog member 52 fluctuates. Thus, the proximity sensor 56 detects a change in the detection unit 54 and detects a value of the distance E, which is the inspected dimension of the photographic film 1a.

As described above, when the inspection of the end face 2a of the photographic film 1a is performed for a predetermined length through the processing defect detection device 10, the detection timer ends (YES in step S3), and Proceeding to S4, the film processing machine 12 is temporarily stopped. Next, after the reset is performed in the equipment (step S5), the operation proceeds to step S6, where the operation is restarted, and the quality of the photo film 1 is checked.
It is determined whether or not a is a normal product (Step S)
7).

That is, in this step S7, if the distance E, which is the inspection dimension of the photo film 1a, is within a predetermined set value range, for example, within a range of 2.00 mm ± 0.15 mm, it is determined that the product is normal. On the other hand, if it is out of the above range, it is determined to be defective. Based on the result of this determination, the sorting device 26 is driven, and the photographic film 1a determined to be non-defective is sent to the winding device 28 (step S8). On the other hand, the photo film 1a determined to be defective
Is discharged to the NG accumulator 30 for a predetermined number of cuts, for example, 10 cuts (step S1).
0), and return to step S1 and step S2.

The photographic film 1b detected in step S2 is subjected to the same processing as that of the photographic film 1a.

As described above, in the present embodiment, when the sprocket member 42 constituting the processing defect detecting device 10 is engaged with the photographic film 1 and transports the photographic film 1, the sprocket member 42 is moved from the side surface 40 of the sprocket member 42. The end face 2a (or 2b) of the photo film 1 is set so as to protrude outward. And the sprocket member 42
End face 2 of photographic film 1 protruding outside from side face 40
The detection dog member 52 is always in contact with a (or 2b), and the fluctuation of the end surface 2a (or 2b) can be continuously detected in real time.

As a result, in this embodiment, it is possible to reliably detect the defective photo film 1 in which the value of the distance E of the photo film 1 which is the dimension to be inspected is out of the set value. Only the defective photographic film 1 can be reliably discharged, and the photographic film 1 to be discarded can be greatly reduced as compared with the conventional sampling inspection method.

Further, the defective photographic film 1 is not fed into the winding device 28, so that it is possible to reliably prevent a defective product from being produced using the defective photographic film 1. Therefore, there is an effect that a high quality product can be efficiently and economically manufactured.

Further, in the present embodiment, one end face 2 of the photographic film 1a is attached to the photographic film 1a, 1b and 1c cut into three slits by the cutting device 18.
In order to detect a and the other end face 2b of the photographic film 1b, it is only necessary to use two processing defect detection devices 10. Thereby, the photographic films 1a, 1b and 1c
In each case, the structure is effectively simplified as compared with the case of using a dedicated processing defect detecting device, and the quality of the distance E of the photographic films 1a, 1b and 1c is detected smoothly and reliably by a simple control. There is an advantage that it becomes possible.

In this embodiment, the photographic film 1 is used.
Although the operation of detecting a processing defect using (1a, 1b, and 1c) has been described, the present invention is not limited to this and can be used for various films.

[0033]

In the film processing defect detecting apparatus according to the present invention, the end face of the film protrudes outward from the side surface of the sprocket member which engages with the perforation of the film, and the fluctuation of the end face is always detected. By doing so, it is possible to reliably and continuously detect the processing failure of the film in real time.

As a result, it is possible to reliably discard a film having a processing defect, and to manufacture a high-quality product efficiently and economically without producing a defective product. .

[Brief description of the drawings]

FIG. 1 is a schematic structural explanatory view of a film processing machine in which a processing defect detection device according to an embodiment of the present invention is incorporated.

FIG. 2 is an explanatory diagram of an arrangement state of a photographic film cut into three slits by the film processing machine and the processing defect detection device.

FIG. 3 is an explanatory perspective view of the processing defect detection device.

FIG. 4 is an explanatory side view of the processing defect detection device.

FIG. 5 is a flowchart showing the operation of the film processing machine.

FIG. 6 is an explanatory diagram of a photographic film having perforations on both side edges.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 1a-1c ... Photo film 2a, 2b ... End face 3a, 3b ... Perforation 10 ... Processing defect detection device 12 ... Film processing machine 14 ... Roll feeding device 16 ... Punching device 18 ... Cutting device 20 ... Trim device 24 ... Transport device Reference Signs List 26 sorting device 28 winding device 30 NG accumulating device 40 side surface 42 sprocket member 44 end face detection mechanism 52 detection dog member 54 detection unit 56 proximity sensor

Claims (3)

[Claims] 1. A film processing defect detecting device for inspecting whether or not a distance between a perforation position provided on a film and an end surface position of the film is within a specified value. A sprocket member, one side surface of which is disposed more inward than the end surface of the film, and an end surface detection device that detects a change in the end surface of the film by contacting an end surface of the film protruding outward from a side surface of the sprocket member. A film processing defect detection device, comprising: a mechanism; 2. An apparatus according to claim 1, wherein said end face detection mechanism is arranged at a swingable detection dog member having one end contacting the end face of said film, and at the other end of said detection dog member. A film processing defect detection device, comprising: a sensor for detecting displacement of a detection dog member. 3. An apparatus according to claim 1, wherein said film is cut into three slits, and said sprocket member and said end face detecting mechanism are provided with a first slit.
A film processing defect detection device, which is disposed on one slit end face side of the slit and the other slit end face side of the second slit.