JPH06258772A - Splicing and splice releasing methods for roll film - Google Patents

Abstract

PURPOSE:To obtain a roll film splicing method capable of holding sufficient splicing strength through various processes in a laboratory and a roll film splice-releasing method capable of easily releasing the splice of the roll film without changing the length of each roll film. CONSTITUTION:After the tailing edge part of the roll film 10 and the leading edge part of the roll film 12 are overlapped so as to make a straight line, the overlapped part is notched to make a circular hole 14 passing through the films 10 and 12 and molten resin is poured into the circular hole 14 so as to be shown by the arrow A and solidified. Therefore the dimension of a projection from the surface of the film of the spliced part (resin after the solidification) cant be made small compared with that in the splice with an adhesive tape and simultaneously, both films 10 and 12 are spliced with sufficient strength. Moreover, the whole of the the spliced part is punched and removed to release the splice without changing the lengths of both films 10 and 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll film joining method and a joining releasing method.

[0002]

2. Description of the Related Art A roll film that has been photographed is taken out from a cartridge and then developed by a developing machine to become a negative film. The developed roll film is printed by a printer for printing.

In particular, in a large laboratory, many roll films are joined together and processed as one roll film by an automatic processor or a printer.
The rear end portion of the first roll film and the front end portion of the second roll film were overlapped with each other, and an adhesive tape made of paper or the like was wound around the overlapped portion to bond the roll films together. After the negative development and print processing, the joint portion of the film was cut off to release the joint. However, in this method, the adhesive tape or the like protrudes from other parts, and the protruding part comes into contact with or collides with various places when being conveyed in the processing layer of the developing machine or the dryer, and as a result, the adhesive tape is damaged. , It was easy to cut or peel, and there was a risk that the joining of films would be released during transportation.

In order to solve such a problem, the applicant of the present application said, "After the rear end of the roll film and the front end of the other roll film are cut off from each other by cutting off their tongues, both rolls are joined together by using a joining tape. A method of joining roll films for joining films "has been proposed (JP-A-4-15).
1150).

[0005]

Certainly, the above-mentioned Japanese Unexamined Patent Application Publication No.
According to the roll film joining method of Japanese Patent Publication No. 151150, a sufficient joining strength can be maintained through various steps of development, exposure correction, printing, and cartridge winding in a laboratory. This alone is not satisfactory.

That is, printing is often repeated several times such as additional printing, and it is desirable that the length of the roll film does not change due to joining and releasing. Also, a cartridge for storing the negative film after printing,
It has been proposed to record printing conditions and other information on this cartridge by magnetic recording or the like to facilitate the storage and handling of a negative film (JP-A-1-279).
No. 250, etc.), it is desirable to leave the tongue portions at both ends as they are without changing the length of the roll film in order to efficiently use the cartridge. In addition, with the "Sharing and Econo Shot" [Fuji Photo Film Co., Ltd. product name (registered trademark)], three extra frames can be taken near the edge of the film for the specified roll film length. Because of the mechanism, it is desired to perform normal printing or reprinting of the joining and unjoining of the roll film without cutting the ends.

However, the above-mentioned Japanese Patent Laid-Open No. 4-15115.
In the method of joining roll films described in Japanese Patent Publication No. 0, it is necessary to cut off the tongue pieces at the rear end of the roll film and the tip of the other roll film before the butting of both roll films. It is impossible to keep the original length.

The present invention has been made in view of the above circumstances, and an object thereof is to maintain a sufficient bonding strength through various processes such as development, exposure correction, printing, and cartridge winding in a laboratory. It is an object of the present invention to provide a method for joining roll films and a method for releasing the joining of the roll films that can easily release the joining of the roll films without changing the length of each roll film.

[0009]

The invention according to claim 1 is
A method of joining roll films for joining a first roll film and a second roll film, wherein the rear end portion of the first roll film and the tip end portion of the second roll film are both roll films. Are stacked so as to form a straight line, at least one through hole penetrating both roll films is formed in the overlapping portion, and molten resin is poured into the through hole to be solidified.

According to a second aspect of the present invention, there is provided a method of joining roll films for joining a first roll film and a second roll film, wherein the rear end portion of the first roll film and the second roll film are joined together. After superposing the front end of the roll film so that the two roll films are aligned with each other, at least one through hole penetrating the both roll films is formed in the overlapping portion, and the through hole is made of resin. The rod-shaped joining member is inserted, and the joining member is heated while applying a compressive force in the axial direction, and as a result, the first and second fall-prevention protrusions projecting outward in the direction orthogonal to the axis at both ends of the joining member. It is characterized by forming a stopper.

According to a third aspect of the present invention, there is provided a method of joining a roll film for joining a first roll film and a second roll film, wherein at least a through hole is provided at a rear end portion of the first roll film. After performing the step of forming one hole and the step of correspondingly forming at least one through hole in the front end portion of the second roll film simultaneously or in any order, the first roll Of the rear end of the first roll film and the second roll film in a state where the through-hole formed in the film and the through-hole formed in the second roll film coincide with each other at least at one place. Overlap the tip part with both roll films in line,
It is characterized in that a molten resin is poured into the through holes to be solidified therein so as to be solidified.

According to a fourth aspect of the present invention, there is provided a roll film joining method for joining a first roll film and a second roll film, wherein at least a through hole is provided at a rear end portion of the first roll film. After performing the step of forming one hole and the step of correspondingly forming at least one through hole in the front end portion of the second roll film simultaneously or in any order, the first roll Of the rear end of the first roll film and the second roll film in a state where the through-hole formed in the film and the through-hole formed in the second roll film coincide with each other at least at one place. Overlap the tip part with both roll films in line,
A rod-shaped joining member made of resin is inserted into the corresponding through-holes, heated while applying a compressive force in the axial direction to the joining member, and as a result, protruded outward in the direction orthogonal to the axis at both ends of the joining member. It is characterized in that first and second stoppers for preventing the falling are formed.

According to a fifth aspect of the present invention, there is provided a method for releasing the joining of the roll films, wherein the entire joining portion of the two roll films joined by any one of the first to fourth joining methods of the roll films is joined. It is characterized by punching and removing.

According to a sixth aspect of the present invention, there is provided a method of joining a roll film for joining a first roll film and a second roll film, wherein the rear end portion of the first roll film and the second roll film are joined together. After the roll film and the leading end of the roll film are overlapped so that the roll films are aligned with each other, at least one through hole penetrating both roll films is formed in the overlapping portion, and both ends are engaged in the through hole. It is characterized in that a metallic joining member provided with a stopper is inserted and engaged.

According to a seventh aspect of the present invention, there is provided a method of joining a roll film for joining a first roll film and a second roll film, wherein at least a through hole is provided at a rear end portion of the first roll film. After performing the step of forming one hole and the step of correspondingly forming at least one through hole in the front end portion of the second roll film simultaneously or in any order, the first roll Of the rear end of the first roll film and the second roll film in a state where the through-hole formed in the film and the through-hole formed in the second roll film coincide with each other at least at one place. Overlap the tip part with both roll films in line,
It is characterized in that a metal joining member having locking pieces provided at both ends is inserted and engaged in the corresponding through holes.

According to an eighth aspect of the present invention, there is provided a method of releasing the joining of the roll films, wherein the joining members are removed from the both roll films joined by the joining method of the roll films according to the sixth or seventh aspect. Characterize.

[0017]

In the invention described in claim 1, the rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned, and the overlap portion is concerned. At least one through hole is formed through both roll films, and molten resin is poured into the through hole and solidified. Therefore, the first roll film and the second roll film
Compared with the case where the roll film of No. 2 is joined with an adhesive tape, the protrusion size from the roll film surface of the joint part (resin after solidification) can be made small, and both roll films are sufficiently separated by the resin after solidification. Bonded with strength. Therefore, development, exposure correction,
Sufficient bonding strength can be maintained through various processes such as printing and cartridge winding, and the bonding between the first roll film and the second roll film is hardly released.

On the other hand, the first roll film and the second roll film
The joining of the roll films can be released without changing the length of both roll films by forcibly peeling by the external force or by heating the joining portion to remelt the resin.

According to the second aspect of the present invention, the rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned with each other, and the overlap portion is concerned. At least one through hole penetrating both roll films is bored, a rod-shaped joining member made of resin is inserted into the through hole, and the joining member is heated while applying a compressive force in the axial direction. First and second stoppers are formed at both ends of the joining member so as to project outward in the direction orthogonal to the axis and to prevent falling. Therefore, the first roll film and the second roll film are joined with sufficient strength by the joining member. Therefore, development, exposure correction,
Sufficient bonding strength can be maintained through various processes such as printing and cartridge winding, and the bonding between the first roll film and the second roll film is hardly released.

On the other hand, the first roll film and the second roll film
Bonding of the roll film is forcibly peeled off by an external force, the bonding member is cut by shearing force, or the bonding member is heated and melted, without changing the length of both roll films, It can be canceled.

According to the third aspect of the present invention, the step of forming at least one through hole at the rear end of the first roll film, and correspondingly, forming the through hole at the front end of the second roll film. After performing the step of forming at least one at the same time or in an arbitrary order, at least one through hole formed in the first roll film and at least one through hole formed in the second roll film are formed. The rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned, and the through holes are formed in the corresponding through holes. The molten resin is poured into the inside and solidified. Therefore, it is possible to reduce the protrusion size of the joint portion (resin after solidification) from the roll film surface as compared with the case where the first roll film and the second roll film are joined by the adhesive tape. Both roll films are bonded with sufficient strength by the resin after singulation. Therefore, sufficient bonding strength can be maintained through various processes such as development, exposure correction, printing, and cartridge winding in the laboratory, and the bonding between the first roll film and the second roll film is hardly released.

On the other hand, the first roll film and the second roll film
The joining of the roll films can be released without changing the length of both roll films by forcibly peeling by the external force or by heating the joining portion to remelt the resin.

According to the fourth aspect of the invention, the step of forming at least one through hole at the rear end of the first roll film and the corresponding step of forming the through hole at the front end of the second roll film. After performing the step of forming at least one at the same time or in an arbitrary order, at least one through hole formed in the first roll film and at least one through hole formed in the second roll film are formed. The rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned in a state where they coincide with each other, and they are made of resin in the corresponding through holes. The rod-shaped joining member is inserted, and the joining member is heated while applying a compressive force in the axial direction, and as a result, the first and second fall-prevention protrusions projecting outward in the direction orthogonal to the axis at both ends of the joining member. Form a stopper. Therefore, the first roll film and the second roll film are joined with sufficient strength by the joining member. Therefore, development in the lab, exposure correction, printing,
Sufficient bonding strength can be maintained through the steps of winding the cartridge, and the bonding between the first roll film and the second roll film is hardly released.

On the other hand, the first roll film and the second roll film
Bonding of the roll film is forcibly peeled off by an external force, the bonding member is cut by shearing force, or the bonding member is melted by applying heat, without changing the length of both roll films, It can be canceled.

According to the fifth aspect of the invention, the entire joint portion of the two roll films joined by any one of the first to fourth roll film joining methods is punched and removed. Therefore, the joining of the first roll film and the second roll film can be released without changing the length of both. Therefore, it is suitable for storing and storing the roll film after the printing process in the cartridge.

According to the sixth aspect of the present invention, the rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned with each other, and the overlap portion is concerned. At least one through hole is formed through both roll films, and a metallic joining member having locking pieces at both ends is inserted and engaged in the through hole. Therefore, the first roll film and the second roll film are easily joined with sufficient strength. Therefore, sufficient bonding strength can be maintained through various processes such as development, exposure correction, printing, and cartridge winding in the laboratory, and the bonding between the first roll film and the second roll film is hardly released.

In the invention described in claim 7, the step of forming at least one through hole at the rear end portion of the first roll film, and correspondingly, forming the through hole at the front end portion of the second roll film. After performing the step of forming at least one at the same time or in an arbitrary order, at least one through hole formed in the first roll film and at least one through hole formed in the second roll film are formed. In a state in which they coincide with each other, the rear end portion of the first roll film and the front end portion of the second roll film are overlapped so that the two roll films are aligned with each other, and both ends are engaged in the corresponding through holes. A metallic joining member provided with a stopper is inserted and engaged. Therefore, the joining member joins the first roll film and the second roll film with sufficient strength and easily. Therefore, sufficient bonding strength can be maintained through various processes such as development, exposure correction, printing, and cartridge winding in the laboratory, and the bonding between the first roll film and the second roll film is hardly released.

In the invention described in claim 8, claim 6 or 7
The joining member is removed from the both roll films joined by the method for joining roll films described above. Therefore, the joining of the two roll films can be easily released without changing the length of the two roll films. Therefore, it is suitable for storing and storing the roll film after the printing process in the cartridge.

Conventionally, when joining one roll film and another roll film, the front end and the rear end of each roll film are cut so that the front surface of the joining portion is perpendicular to the longitudinal direction of the respective films. However, in the present invention (the inventions of claims 1 to 4 and claims 6 to 7), the original shape is maintained without cutting the leading end and the trailing end.
It is preferable to join the rear end of the first roll film and the front end of the second roll film. In addition, in the present invention (the inventions of claims 1 to 4 and claims 6 to 7), when the rear end portion of the first roll film and the leading end portion of the second roll film are overlapped, whichever is upward. However, it is desirable to determine in consideration of the conveyance direction in the developing machine or the like.

Further, in the invention described in claims 3 to 4 and 7, the step of forming at least one through hole in the rear end portion of the first roll film, and the second step corresponding thereto The step of forming at least one through-hole at the tip of the roll film may be carried out before or after the developing step in the lab. Therefore, other than the negative film as the roll film, the through-hole at the manufacturing stage is It is also possible to use a punched green film.

[0031]

【Example】

<< First Embodiment >> A first embodiment of the present invention will be described below with reference to FIGS.

[First Step] As shown in FIG.
The rear end portion 10A of the first roll film 10 on the front end portion 12A of the roll film 12
Stack so that 0 and 12 are in a straight line. Note that FIG.
On the contrary, the front end portion 12A of the second roll film may be stacked on the rear end portion 10A of the first roll film 10.

Here, as the roll films 10 and 12, 100 μm polyethylene terephthalate (PET) is used.
The base has a base, and the emulsion layer and the protective film are formed by the Fuji Color 400G photosensitive material (trade name) applied to the front surface (the front surface of the paper surface in FIG. 1) and the back surface (the rear surface of the paper surface in FIG. 1). A 35 mm wide photographic film having an antihalation layer formed on its surface is used. In addition, as these roll films 10 and 12, 50
Film-based [polycarbonate-based, polyethylene terephthalate-based or tri-acetate (TAC) -based] photographic films of .about.170 .mu.m, preferably 80 to 130 .mu.m may be used.

[Second Step] As shown in FIG. 2, two through-holes having a diameter of 4 mm which penetrate the roll films 10 and 12 at predetermined intervals in the overlapping portions of the roll films 10 and 12. The circular holes 14 and 16 are formed at the same time or in an arbitrary order by using a boring device (not shown).

[Third step] As shown in FIG.
Both roll films 10 and 12 in this state are sandwiched by one (upper side in FIG. 3) spot mold 18 and the other (lower side in FIG. 3) spot mold 20. At this time, the center of the recesses 18A and the recesses 20A (the maximum diameter L of these recesses is set to 12 mm) and the roll films formed in the second step, which are provided so as to face the spot molds 18 and 20, respectively. It is necessary to position so that the centers of the round holes formed in the holes 10 and 12, for example, the round holes 14 substantially coincide with each other. In addition, at the time of shifting from the second step to the third step, both roll films 10 and 12 are formed by using an adhesive means having a weak adhesive force.
May be temporarily stopped.

Then, one of the spot molds 18 is provided with a recess 18
A predetermined amount (somewhat larger than the inner volume of the round hole 14) of the hot melt resin melted through the resin flow path 18B formed corresponding to A is introduced into the round hole 14 as shown by an arrow A in FIG. Pour. After a certain period of time, the poured hot melt resin is cooled and solidified to form a joining member 22A having a shape like a rivet after joining as shown in FIG.

Similarly, the hot melt resin poured into the round holes 16 is cooled and solidified to form a joining member 22B having a shape like a rivet after joining as shown in FIG.

In the state of FIG. 4, the first roll film 1
0 and the second roll film 12 are firmly joined by the joining member 22A and the joining member 22B.

The hot-melt resin referred to in the present invention means that the processing temperature of the processing liquid is
A resin which is solid below the drying temperature and has the property of becoming a fluid at a temperature lower than the temperature at which various supports (TAC, PET, etc.) constituting a silver salt photographic film start to melt, and more specifically, Solid below 50 ° C and 50 ° C
A resin that becomes a fluid at 300 ° C (more preferably 70 ° C to 200 ° C).

The hot melt resin may be any resin satisfying the above conditions, and any of a single resin, a mixed resin and a resin containing a plasticizer can be used. In addition, even a single resin has a different temperature range, which is a fluid, depending on the molecular weight. Therefore, a resin having a molecular weight satisfying the above conditions may be selected.

Specific examples of the hot melt resin include ethylene vinyl acetate resin (EVA), polyamide, polyester, polyethylene (PE), polypropylene (PP).
Etc. can be used. It is easy to use a low molecular weight (molecular weight = 200 to 2000) polyethylene as the polyethylene and an unstretched polypropylene (CPP) as the polypropylene. The ethylene vinyl acetate resin is preferably a mixed resin containing 1 to 20% vinyl chloride.

As the plasticizer to be added to the resin, tricresyl phosphate, dibutyl terephthalate, etc. can be used.

Further, a mixed resin containing synthetic rubber can be used. Specifically, there are a mixed resin of nitrile rubber and phenol resin, a mixed resin of chloroprene rubber and polyethylene, and the like.

[Fourth Process] Next, the roll film 1 is formed by punching out a region including the joining members 22A and 22B using a punching tool (not shown) having a tip diameter of 6 mm.
The joint of 0 and 12 can be easily released without changing the length of both. Even when the above-described temporary fixing is performed, the adhesive force is weak, so that the two roll films 10 and 12 can be easily joined together.

When the joining and the joining of the first roll film 10 and the second roll film 12 are repeated several times, in the second time, after the first to fourth steps, the same as in the first step. Then, on the front end portion 12A of the second roll film 12, the rear end portion 1 of the first roll film 10 is
Overlap 0A. At this time, the first punched out in the fourth step
It is necessary to position so that the circular holes (not shown) having a diameter of 6 mm formed in the roll film 10 and the second roll film 12, respectively, are overlapped with each other. It is based on the perforations provided at both ends in the direction.

Then, in the same manner as in the third step, the hot melt resin is poured into the round hole having a diameter of 6 mm, and is cooled and solidified to form a joining member slightly larger than the joining members 22A and 22B. The 1st roll film 10 and the 2nd roll film 12 are joined by.

Next, the region including the joining member is punched out by using a punching tool (not shown) having a tip diameter of 8 mm, whereby the joining of the two roll films 10 and 12 can be easily released without changing the length of the two.

Thereafter, the first roll film 10 and the second roll film 12 are joined and unjoined by the same procedure as the second and subsequent ones. In addition, it is assumed that the circular holes sequentially have holes each having a diameter of 2 mm.

In this way, assuming the reprinting three times, the joining / unjoining of the first roll film 10 and the second roll film 12 was repeated four times, and the joining strength was measured by the tensile tester. The first time is 12.5kg,
The fourth time was 16.3 kg. From this, the second
It can be easily imagined that the bonding strengths of the 1st and 3rd times are 12.5 kg to 16.3 kg.

Usually, it is sufficient that the strength measured by the tensile tester is 1.2 kg or more, so that it can be seen that sufficient bonding strength can be secured in the case of the first embodiment.

The roll film 1 is produced by the above method.
As a result of joining 0 and 12 and performing standard treatment with an automatic processor FNCP-600II (trade name) manufactured by Fuji Photo Film Co., Ltd.,
It was confirmed that the joining of the roll films 10 and 12 was not released during the transportation. In addition, since it is the developing process that a large tension acts on the roll film during the transportation in the laboratory process, the above bonding strength is
It can be seen that it is sufficient through the processes of exposure correction, printing, and cartridge winding.

In the first embodiment described above, the first roll film 10 and the second roll film 12 are joined by forcibly peeling by an external force or by heating the joint portion to form a joining member 22A made of resin. 22B may be remelted or released, and even in this case, the joining can be released without changing the lengths of both roll films.

In FIG. 2, reference numerals 17A and 17B are used.
Indicates a circular hole with a diameter of 10 mm for the fourth joining, which is formed when the third joining is released.

In the second step of the first embodiment, the round holes 14,
Instead of 16, square hole 2 with a side of 4 mm as shown in FIG.
4, 26 were punched, the roll films 10 and 12 were joined in the same manner as above, and the joining strength was measured by a tensile tester. As a result, it was 13.7 kg. Also in this case, it can be seen that sufficient bonding strength can be secured. In this case, in order to release the joining of the roll films 10 and 12, punching may be performed using a square-shaped punching tool having a tip slightly larger than the square holes 24 and 26, for example, a side of 6 mm. In order to repeat joining / unjoining several times, a square hole having a size of 2 mm on each side may be used to sequentially form a square hole having a larger size.

<< Second Embodiment >> Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same components as those in the first embodiment described above are designated by the same reference numerals.

This second embodiment is the same as the above-mentioned first embodiment in the first and second steps, but the third step is different as follows.

[Third step] As shown in FIG.
In the second step shown in FIG. 2, the bonding member 28 made of a rod-shaped resin is inserted into the round holes, for example 14, formed in both roll films 10 and 12, and one is provided in a pressing device (not shown) (in FIG. 6). While applying a compressive force in the axial direction to the joining member 28 by using the heater / press jig 30 on the upper side and the heater / press jig 32 on the other side (the lower side in FIG. 6) (see arrows B and C in FIG. 6). To heat.

As a result, as shown in FIG. 7, first and second stoppers 28A and 28B for preventing the protrusions are formed at both ends of the joining member 28 so as to project outward in the direction orthogonal to the axis, and the first stoppers are formed.
The roll film 10 and the second roll film 12 are joined by the joining member 28. By inserting the joining member 28 into the round hole 16 in the same manner as above and heating it while applying the compressive force in the axial direction as well, the first and second stoppers at both ends of the joining member 28 for preventing falling are provided. 28A and 28B are formed, and the first roll film 10 and the second roll film 12 are joined by the joining member 28.

The joining of the first roll film 10 and the second roll film 12 can be released without changing the length of both by going through the same fourth step as in the first embodiment.

In this case as well, as a result of the test by the tensile tester, the result substantially equivalent to that of the first embodiment was obtained.

The roll film 1 is produced by the above method.
As a result of joining 0 and 12 and performing standard treatment with an automatic processor FNCP-600II (trade name) manufactured by Fuji Photo Film Co., Ltd.,
It was confirmed that the joining of the roll films 10 and 12 was not released during the transportation. Therefore, it can be seen that this bonding strength is sufficient through the processes of development, exposure correction, printing, and cartridge winding in the laboratory.

In the second embodiment, the first roll film 10 and the second roll film 12 are joined by forcibly peeling by an external force, the joining member 28 is cut by a shearing force, or the joining member 28. It may be released by applying heat to melt it. Even in this case, the roll films 10 and 12 can be released without changing their lengths.

The number and arrangement of the round holes as the through holes are not limited to those exemplified in the first and second embodiments, and the rear end portion 10A of the first roll film 10 and the second end of the second roll film 10 may be arranged. It suffices if at least one hole is formed in the overlapping portion of the roll film 12 with the front end portion 12A. In particular, when increasing the number of through holes, it is necessary to make the roll film strong enough not to break during transportation in the developing machine. Further, as the through hole, other than the round hole and the square hole, other polygonal holes may be formed.

<< Third Embodiment >> Next, a third embodiment of the present invention will be described with reference to FIGS.

The third embodiment will be described below step by step. [First Step] As shown in FIG. 8, circular holes 34A and 36A as two through holes having a diameter of 4 mm are formed in the rear end portion 10A of the first roll film 10 and as shown in FIG. The front end portion 12A of the second roll film 12
Then, corresponding to the round holes 34A and 36A, round holes 34B and 36B are formed as through holes having a diameter of 4 mm.

Here, the first roll film 10 and the second roll film 10
The roll film 12 may be punched simultaneously or in any order. The round holes 34A, 36A, the round holes 34B, 3
6B may be sequentially drilled in an arbitrary order, or may be drilled at the same time, but in view of work efficiency, it is preferable to drill two at the same time using a drilling device having a positioning mechanism. .

[Second Step] As shown in FIG. 10, the rear end portion 10 of the first roll film 10 is placed on the leading end portion 12A of the second roll film 12 on a pedestal (not shown).
A is a circular hole 3 formed in the second roll film 12 so that both roll films 10 and 12 are aligned.
4B and 36B and the circular holes 34A and 36A formed in the first roll film 10 are aligned (overlapped) so as to overlap. The alignment of these round holes is performed by forming the round holes 34A and 36A in the roll film 10 and the round holes 34B and 36B in the roll film 12 in the first step.
The positional relationship between the drilled round holes 34A, 34A and the round hole 3
4B and 36B have the same positional relationship as each other, so that the roll films 10 and 12 are aligned with each other, and the perforations provided at both ends of each roll film in the width direction are used to form a circle. This can be done simply by matching the holes.

[Third Step] By the same step as the third step of the first embodiment described above, the round holes 34A, 34B, 36A,
Joining member 2 shaped like a rivet after joining, which is formed by cooling and solidifying the hot melt resin poured into 36B.
The first roll film 10 and the second roll film 12 are joined by 2A and the joining member 22B (see FIG. 4), and the same effect as that of the first embodiment is obtained.

Here, as the third step, the first roll film 10 and the second roll film 12 are joined by using the joining member 28 by the same step as the third step of the second embodiment. May be. In this case, the same effect as the second embodiment can be obtained.

[Fourth Process] Similar to the first and second embodiments described above, a region including the joining member is punched by using a punching tool (not shown) having a tip diameter of 6 mm,
The joining of both roll films 10 and 12 can be easily released without changing the length of both.

Here, when the same process as the third process of the first embodiment is performed in the third process, the first roll film 1
The joining of 0 and the second roll film 12 may be released by forcibly peeling by an external force, or re-melting the joining members 22A and 22B made of resin by heating the joining portion. However, the joining can be released without changing the length of both roll films.

When the third step is the same as the third step of the second embodiment, the first roll film 10
The joining of the second roll film 12 and the second roll film 12 may be released by forcibly peeling by the external force, cutting the joining member 28 by the shearing force, or melting the joining member 28 by applying heat. . Even in this way, both roll films 10,
It can be released without changing the length of 12.

When the joining method and the joining releasing method of the roll films 10 and 12 are repeated several times, in the second time, the roll film 10 is used for the first joining release in the same manner as described in the first embodiment. , 12 mm diameter drilled in 12
Using the round hole of the first step by the same step as the third step
The roll film 10 and the second roll film 12 may be joined, and thereafter, the joining and the joining may be repeated while sequentially forming circular holes having a large diameter of 2 mm.

In this way, assuming reprinting three times and joining and unjoining the first roll film 10 and the second roll film 12 four times, the same effect as that described in the first embodiment is obtained. Can be obtained.

In the third embodiment, round holes 34A and 36A are formed in the rear end portion 10A of the first roll film 10, and the front end portion 12A of the second roll film 12 is correspondingly formed.
The first step of forming the round holes 34B and 36B in the above may be performed before or after the developing step in the lab.
Therefore, in addition to the negative films as the roll films 10 and 12, the round holes 34A, 36A, 34B and 3 are used at the manufacturing stage.
It is also possible to use a raw film having 6B perforated.

The number and arrangement of the round holes as the through holes are not limited to those exemplified in the third embodiment, and at least one of them may be provided at the rear end portion 10A of the first roll film 10. Correspondingly, it suffices if at least one hole is provided in the front end portion 12A of the second roll film 12. In particular,
When the number of through-holes is increased, it is necessary to make the strength such that the roll film is not broken during conveyance in the developing machine.

As the through holes, triangular holes, quadrangular holes, and other polygonal holes may be formed in addition to the round holes.

<Fourth Embodiment> A fourth embodiment of the present invention will be described below with reference to FIGS. 11 to 16.

[First Step] As shown in FIG. 11, three pairs of round holes 38A, 38A as through holes having a diameter of 4 mm are formed in the rear end portion 10A of the first roll film 10 as a set. In addition, as shown in FIG. 12, the three sets of round holes 38 are formed in the tip portion 12A of the second roll film 12.
Corresponding to A and 38A, three sets of two round holes 38B and 38B are formed as through holes having a diameter of 4 mm.

Here, the first roll film 10 and the second roll film 10
The roll film 12 may be punched simultaneously or in any order. Further, the round holes 38A, 38A and the round holes 38B, 38B may be sequentially formed in an arbitrary order,
Although the holes may be drilled at the same time, it is preferable to drill a plurality of holes at the same time by using a hole punching device having a positioning mechanism in consideration of work efficiency.

[Second Step] As shown in FIG. 13, the rear end portion 10 of the first roll film 10 is placed on the leading end portion 12A of the second roll film 12 on a pedestal (not shown).
A is a set of three round holes 38B, 38B formed in the second roll film 12 so that the two roll films 10, 12 are in a straight line, and three sets of three holes formed in the first roll film 10. The circular holes 38A and 38A are overlapped so that they coincide (overlap) with each other. The alignment of these round holes is
In the first step, the roll film 10 has three round holes 38A,
38A, and three sets of round holes 38 are formed in the roll film 12.
B and 38B are drilled, round holes 38A and 3 are drilled.
If the positional relationship between 8A and the circular holes 38B, 38B is the same, the roll film 1
This can be easily done by aligning 0 and 12 with each other and using the perforations provided at both ends in the width direction of each roll film so that the round holes are aligned with each other.

[Third Step] A joining member 40 made of a substantially U-shaped metal (which can be easily deformed) as shown in FIG.
Each pair of round holes 38A, 38 formed in the roll film 10 in which the both leg portions 40A, 40B of FIG.
Both legs 40 of the joining member 40 are simultaneously positioned to A.
A and 40B are simultaneously driven and inserted into the round holes 38A, 38A, 38B, and 38B of the respective groups formed in the roll films 10 and 12, respectively. As a result, the locking pieces 40C and 40D provided on the two leg portions 40A and 40B of the joining member 40 respectively toward the inside (the distances between the locking pieces 40C and 40D are round holes 38A, 38A, 38B and 38B of the respective groups). (Slightly wider than the mutual distance) engages with the roll film 12 on the back surface side of the second roll film 12. In this way, the first roll film 10 and the second roll film 12 are joined by the joining member 40.
FIG. 14 shows the first roll film 10 and the second roll film 12 joined by the joining member 40.

In this case, the first roll film 10 and the second roll film 12 are joined to each other by inserting the tip 42A of the extraction jig 42 having an L-shaped cross section as shown in FIG. (See E and F) between the joining member 40 and the first roll film, and pulling out in the direction orthogonal to the film by holding the rising portion 42B on the base end side (or pulling out using the principle of leverage). The roll films 10 and 12 can be easily released without changing their lengths.

By the above method, the first roll film 1
0 was bonded to the second roll film 12, and the bonding strength was measured by a tensile tester to find that it was 10.1 kg. The strength measured by a tensile tester is usually 1.2 kg
Since the above is sufficient, it can be seen that sufficient bonding strength can be secured even in the case of the fourth embodiment.

Further, the roll film 1 is produced by the above method.
As a result of joining 0 and 12 and performing standard treatment with an automatic processor FNCP-600II (trade name) manufactured by Fuji Photo Film Co., Ltd.,
It was confirmed that the joining of the roll films 10 and 12 was not released during the transportation. Therefore, it can be seen that the above-mentioned bonding strength is sufficient through the processes of development, exposure correction, printing, and cartridge winding in the laboratory.

In the fourth embodiment, round holes 34A and 36A are formed in the rear end portion 10A of the first roll film 10, and the front end portion 12A of the second roll film 12 is correspondingly formed.
The first step of forming the round holes 34B and 36B in the above may be performed before or after the developing step in the lab.
Therefore, in addition to the negative films as the roll films 10 and 12, the round holes 34A, 36A, 34B and 3 are used at the manufacturing stage.
It is also possible to use a raw film having 6B perforated.

In the above embodiment, the roll films 10, 1
Since the joining member 40 is inserted into and engaged with the hole 2 in advance, it is possible to prevent film scraps from being generated when the joining member 40 is driven, and the roll films 10 and 12 are taken out when the joining member 40 is pulled out. Can be prevented from tearing. In addition, roll film 10, 1
In order to more surely prevent 2 from tearing, the round hole 34
You may reinforce the circumference | surroundings of A, 36A, 34B, 36B using a suitable member.

The joining force can be increased by using a joining member having a wider width instead of the joining member 40, but in this case, it is preferable to form the joining member with a metal of a softer material. .

Further, in the above embodiment, a set of two round holes is formed in the roll films 10 and 12, and a metal joining member 40 having a shape as shown in FIG. 15 is used correspondingly. Although the case has been illustrated, the present invention is not limited to this, and it is possible to insert and engage in one round hole by devising the shape of the metal joining member, or three,
It is also possible to insert and engage the four round holes at the same time. The number and arrangement of the round holes as the through holes are not limited to those illustrated in the fourth embodiment, and the through holes include round holes, triangular holes, square holes, and other polygonal shapes. The holes may be provided.

In the fourth embodiment, the order of the first step and the second step may be exchanged. In this case, similarly to the above-described first embodiment, the rear end portion 10A of the first roll film 10 and the second roll film 12 are first formed.
The leading end 12A may be overlapped, and a through hole for inserting the joining member 40 that penetrates both the roll films 10 and 12 may be formed in the overlapping portion.

In the above-mentioned first to fourth embodiments, the case where the rear end portion 10A of the first roll film 10 is superposed on the front end portion 12A of the second roll film 12 has been exemplified. On the rear end portion 10A of the first roll film 10, the front end portion 1 of the second roll film 12 is provided.
You may make it overlap 2A. In practice, it is desirable to determine which should be the upper side in consideration of the conveying direction in the developing machine and the like.

In the first to fourth embodiments, the first roll film 10 and the second roll film 12 joined by the joining method according to the present invention are automatically developed by Fuji Photo Film Co., Ltd. The case of performing standard processing with the machine FNCP-600II (trade name) is illustrated, but the processing machine applicable to the processing of the roll films 10 and 12 is not limited to this, and for example, Phot.Sci. Eng. ~ 54 (196
It can be applied to the processing in any type of processing machine described in 1). Among them, drum processing machine, roller developing machine (automatic developing machine), cine type developing machine, leader belt type developing machine, roller conveying developing machine, small opening developing machine,
A slit-type automatic developing machine having a small opening ratio and a small amount of tank liquid, a closed automatic developing machine having an extremely small opening ratio, and a developing machine having a multi-chamber treatment tank are particularly preferable. Drum processing for these processing machines is in December issue of Photo Industry (1974) p.45, for the roller automatic developing machine is February issue of Photo Industrial (1975) p.71, and for the cine type automatic developing machine is March issue of Photo industrial. (1975) p.70, Leader belt processing is described in May issue of Photo Industry (1975) p.36, and roller conveying automatic processing machine is described in June issue of Photo industry (1975) p.41. .

The roll film to which the joining method / joining releasing method according to the present invention is applied has a photosensitive layer formed on one surface (for example, the front surface) and a ferromagnetic material is applied on the remaining one surface (for example, the back surface). (See Japanese Patent Application Laid-Open No. 4-32840, etc.). In the photosensitive layer of such a roll film, manufacturing information can be recorded in a portion outside the screen frame, and photographing information and print information can be recorded in a magnetic recording layer made of a coating film of a ferromagnetic material. -131872 gazette etc.).

The roll film to which the joining method / joining releasing method according to the present invention is applied can be used by being housed in a cartridge having a shape that can be easily positioned in the camera.

The photosensitive material of the roll film to which the joining method / joining releasing method according to the present invention is applied is not limited to the Fuji Color 400G photosensitive material (trade name) exemplified in the above-mentioned embodiment, and the following photosensitive materials are used. Materials may be used, and the following may be used as the processing agent in the developing step and the like.

First, the light-sensitive materials will be described. The silver halide light-sensitive materials are classified by use into amateur, industrial material, medical, scientific, and the like, and by processing method, black-and-white development, color development, and normal development. Negative type processing method, light
The positive method by reversal, the positive method by chemical reversal, the positive method by giving the emulsion a reversal mechanism and the positive method by diffusion transfer etc. can be mentioned. Further, examples of the light-sensitive material that can be used for the roll film include those described in JP-A-3-33845, pages 13 to 26.

Next, the processing agent will be described. Processing liquid types include black and white developing solutions, color developing solutions, bleaching solutions, fixing solutions,
Bleach-fixing solution, stabilizing solution, other stop solution, neutralizing solution, hardening solution, intensifying solution, reducing solution, supersensitizing solution, toning solution, etc. can be used.

As these treatment liquids, those containing various compounds can be used according to the purpose. For example, in developing solutions, black and white developing agents, color developing agents, development aids, antifoggants, surface development inhibitors, development accelerators, chelating agents, buffers, preservatives, precipitation inhibitors, antisludge agents, tar prevention agents. Agents can be added. As a special example, DIR-releasing drug,
Dye developing agents, color precursor agents, desensitizing agents, anti-ferostatic agents, external couplers, competitive couplers, etc. can also be added.

In addition to these, an alkaline agent for adjusting the pH, an acid agent, various activators for changing the surface tension, and the like can be added. These examples may be added in addition to the developer. In addition to these, a fluorescent whitening agent, an image stabilizer, a draining agent, an antifungal agent, an antibacterial agent and the like can be added. The processing order of applying these processing agents to the light-sensitive material may be a prescribed order or may be changed depending on the case. Further, as the processing liquid, JP-A-3-33845, No. 9
Those described on pages 13 to 13 can be used.

[0100]

As described above, according to the roll film joining method of the present invention, the first roll film and the second roll film joined by the method are
There is an effect that sufficient bonding strength can be maintained through various processes such as development, exposure correction, printing, and cartridge winding in the laboratory. Further, according to the joining release method according to the present invention, it is possible to easily release the joining of both roll films without changing the length of each roll film, each roll even when repeated reprinting etc. The film is never too short. In particular, when the film is stored in a film storage cartridge such as the above-mentioned JP-A-1-279250, the roll film can be wound around the cartridge as it is, so that automation at the time of reprinting can be promoted and Productivity can be improved.

The method of joining and releasing the roll film according to the present invention can be used for a roll film which is conveyed under a large tension in a developing solution, as well as a print or a film which is conveyed under a small tension in air. Of course, it can be applied to an exposure roll film for reprinting. In particular, the present invention is suitable for a roll film in which the number of frames taken is larger than the standard.

[Brief description of drawings]

FIG. 1 is a plan view showing a first roll film and a second roll film in a first step of a first embodiment.

FIG. 2 is a plan view showing a second step of the first embodiment.

FIG. 3 is a schematic vertical sectional view showing a third step of the first embodiment.

FIG. 4 is a front view showing a first roll film and a second roll film joined by the joining method according to the first embodiment.

FIG. 5 is a plan view showing a modification of the first embodiment.

FIG. 6 is a schematic vertical sectional view showing a third step of the second embodiment.

FIG. 7 is a schematic vertical cross-sectional view showing a first roll film and a second roll film joined by the joining method according to the second embodiment.

FIG. 8 is a plan view showing a first roll film in a first step of the third embodiment.

FIG. 9 is a plan view showing a second roll film in the first step of the third example.

FIG. 10 is a plan view showing a second step of the third embodiment.

FIG. 11 is a plan view showing a first roll film in a first step of the fourth embodiment.

FIG. 12 is a plan view showing a second roll film in the first step of the fourth example.

FIG. 13 is a plan view showing a second step of the fourth embodiment.

FIG. 14 is a plan view showing a first roll film and a second roll film joined by a joining method according to a fourth embodiment.

FIG. 15 is a schematic perspective view showing a third step of the fourth embodiment.

FIG. 16 is a perspective view showing, together with a joining member, an extraction jig used for releasing the joining of the roll film joined by the joining method according to the fourth embodiment.

[Explanation of symbols]

 10 1st roll film 10A 1st roll film rear end part 12 2nd roll film 12A 2nd roll film front end part 14 Round hole (through hole) 16 Round hole (through hole) 24 Square hole (penetration) Hole) 28 joining member 28A first stopper 28B second stopper 38A round hole (through hole) 38B round hole (through hole) 40 joining member

Claims (8)

[Claims] 1. A method of joining a roll film for joining a first roll film and a second roll film, comprising: a rear end portion of the first roll film; and a front end portion of the second roll film. After the two roll films are overlapped so as to form a straight line, at least one through hole penetrating the both roll films is formed in this overlapping portion, and a molten resin is poured into the through hole to solidify. Method of joining roll film. 2. A method of joining a roll film for joining a first roll film and a second roll film, comprising: a rear end portion of the first roll film; and a front end portion of the second roll film. After the two roll films are stacked so as to form a straight line, at least one through hole penetrating the both roll films is bored in the overlapping portion, and a rod-shaped joining member made of resin is inserted into the through hole. Then, the joint member is heated while applying a compressive force in the axial direction, and as a result, the first and second stoppers for preventing the protrusion that protrude outward in the direction orthogonal to the axis are formed at both ends of the joint member. A characteristic method of joining roll films. 3. A roll film joining method for joining a first roll film and a second roll film, wherein at least one through hole is formed in a rear end portion of the first roll film. And correspondingly to this, the step of forming at least one through-hole in the tip portion of the second roll film is performed simultaneously or in any order, and then the first roll film is formed. The rear end portion of the first roll film and the front end portion of the second roll film are connected to each other in a state where the through hole and the through hole formed in the second roll film match at least at one place. A method for joining roll films, characterized in that the roll films are stacked in a straight line, and a molten resin is poured into the through holes so that they are solidified. 4. A method of joining a roll film for joining a first roll film and a second roll film, wherein at least one through hole is formed in a rear end portion of the first roll film. And correspondingly, the step of forming at least one through-hole at the tip of the second roll film is performed simultaneously or in any order, and then the first roll film is formed. The rear end portion of the first roll film and the front end portion of the second roll film are connected to each other in a state where the through hole and the through hole formed in the second roll film match at least at one place. The roll films are stacked so as to form a straight line, a rod-shaped joining member made of a resin is inserted into the corresponding through holes, and the joining member is heated while applying an axial compressive force to the joining member. Axis orthogonal to both ends Method of bonding roll film, which comprises forming a first, second stop for dropout prevention protruding toward the outside. 5. A method for releasing the joining of roll films, wherein the entire joining portion of the two roll films joined by any one of the joining methods of the roll films according to claim 1 is punched and removed. 6. A roll film joining method for joining a first roll film and a second roll film, comprising: a rear end portion of the first roll film; and a front end portion of the second roll film. After stacking the two roll films in a straight line, at least one through hole penetrating the both roll films is bored in the overlapping portion, and locking pieces are provided at both ends in the through hole. A method for joining a roll film, comprising inserting and engaging a joining member made of metal. 7. A method of joining a roll film for joining a first roll film and a second roll film, wherein at least one through hole is formed in a rear end portion of the first roll film. And correspondingly to this, the step of forming at least one through-hole in the tip portion of the second roll film is performed simultaneously or in any order, and then the first roll film is formed. The rear end portion of the first roll film and the front end portion of the second roll film are connected to each other in a state where the through hole and the through hole formed in the second roll film match at least at one place. A method for joining roll films, characterized in that the roll films are stacked so as to form a straight line, and a metallic joining member having locking pieces provided at both ends is inserted into and engaged with the corresponding through holes. 8. A method for releasing the joining of roll films, wherein the joining members are removed from the both roll films joined by the joining method of the roll films according to claim 6.