JPH11327086A - Magazine for roll photosensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily separate a cylindrical body from side plates in the disposal of a spent magazine and to prevent deterioration of product protective property due to the disassembly, the deformation or the damage of a magazine caused by the vibration or the shock in transportation by joining and fixing the cylindrical body to the side plates with a belt like material fold by laminating plural thermoplastic resins each having different melting point and having equal to or below a specific thickness. SOLUTION: The magazine for roll type photosensitive material is composed of the cylindrical body 1 having a slit like drawing opening and the side plate 2 for sealing the side faces and pivoting the roll type photosensitive material 3. The cylindrical drum body 1 and the side plates 2 are fixed to each other with the <=300 μm thick belt like material 4 formed by laminating at least >=2 thermoplastic resin each having different melting point. That is, the thickness of the belt like material 4 is made thin by using a laminated body of at least 2 layers of the films composed of a film made of a relatively low m.p. thermoplastic resin and a film made of a higher m.p. thermoplastic resin and melting only the lower m.p. thermoplastic resin to heat seal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable roll-type photosensitive material magazine, and more particularly to a roll-type photosensitive material magazine (hereinafter, referred to as a magazine) capable of easily separating a cylindrical body and a side plate.

[0002]

2. Description of the Related Art Rolled photosensitive materials are sold in a state of being packaged in a light-shielding sheet material or a bag, and in the case of an exposure apparatus capable of loading the photosensitive material in a bright room, the photosensitive material is once exposed to light. Metal, resin, with outlet in dark room
It was necessary to refill a special magazine made of other materials. However, recently, disposable magazines made of cardboard, cardboard, or resin have become widespread, and users can easily load photosensitive materials in a light room by purchasing photosensitive materials packed in the disposable magazines. .

[0003] Disposable magazines, for example,
Nos. 5-88980 and 60-167796;
6-16608, JP-A-55-124140, 5
Nos. 7-128333, 60-15658, 61
-219040, 62-240958, Tokubiko Sho 59
There is one described in JP-A-36736.

[0004] These magazines are formed of various materials depending on the type, size and use of the photosensitive material to be stored. In general, the body is often made of paper and the side plates are made of plastic resin from the viewpoint of providing a certain degree of strength. FIG. 5 is an exploded perspective view of a general disposable magazine, and FIG. 6 is a plan view of a side plate. The edge of the cylindrical body 1 made of paper is fitted into the groove 8 of the side plate 2 made of resin, and is fixed with an adhesive or the like to complete the magazine. The roll-shaped photosensitive material 3 housed in the magazine is rotatably supported by a bearing 6 provided integrally with the side plate 2, and is provided with a slit-shaped outlet 9.
Used by drawing from.

[0005] These magazines need to secure light-shielding properties and strength. In particular, it is necessary to pay attention to decomposition, deformation and breakage during transportation. Further, it is necessary to consider material costs and environmental problems at the time of disposal from the viewpoint of disposability.

[0006] Separation and disposal of magazines is indispensable as an environmental consideration when disposing of these magazines. Also, when these magazines are collected for the purpose of recycling or the like, decomposition of the magazines is indispensable from the viewpoint of storage space and smooth processing. Therefore, after the use of the magazine, it is necessary to separate the paper body and the resin side plate, and in a conventional magazine, the separation work requires a great deal of labor.

As a magazine for solving the above problems,
Japanese Patent Application Laid-Open No. 9-160177 discloses a magazine in which a cylindrical body and side plates are wound and fixed with a belt-shaped material of a thermoplastic resin such as propylene. In this magazine, the side plate and the cylindrical body can be easily separated by cutting the band-shaped material.

The strip used in the magazine has a relatively large thickness of about 400 μm or more in consideration of breakage during transportation and the like. The swelling from the side plate surface due to the thickness of the band-shaped material, when loaded into an output machine such as an image setter or a plate setter, causes a position shift of the slit-shaped outlet, so that a step is formed on the side plate so that the band-shaped material does not rise. It had to be provided.
Therefore, the processing of the side plate required expense.

Further, when the thickness of the belt-like material such as a thermoplastic resin is generally increased, the rigidity is increased (the stiffness is increased), the fitting property when wound around a magazine is lacked, and slack is easily generated particularly at the corners. In addition, there has been a problem that the belt-like material is often loosened or shifted due to vibration during transportation or the like, and in a severe case, the strip-shaped material is separated. The loosening of the strip material loosened the joint between the side plate and the tubular body, causing rattling, and hindering light-shielding properties, the ability to pull out the photosensitive material, and the setting properties for an output device.

[0010] In addition, upon separation and disassembly after use of the magazine,
Conventional strip materials cannot be cut without using a cutting jig such as a cutter knife or scissors. Also, the bonded portions of the band-shaped materials wound around the magazine could not be easily cut because they were firmly bonded with an adhesive, a stapler, a heat seal or the like.

Also, the magazine disclosed in Japanese Patent Application Laid-Open No. 9-160177 may need to be lightly temporarily fixed with an adhesive so that the side plate and the band-shaped body do not separate from each other when the band-shaped material is wound around the magazine. Work efficiency was reduced.

[0012]

SUMMARY OF THE INVENTION It is an object of the present invention to dispose of a used magazine so that the cylindrical body and the side plate can be easily separated from each other. An object of the present invention is to provide a roll photosensitive material magazine that is prevented from being damaged and from deteriorating product protection.

[0013]

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll-shaped photosensitive material comprising a cylindrical body having a slit-shaped outlet and a side plate which closes the side surface and supports the roll-shaped photosensitive material. A magazine for a roll-shaped photosensitive material, characterized in that the cylindrical body and the side plate are joined and fixed with a strip having a thickness of 300 μm or less in which at least two kinds of thermoplastic resins having different melting points are laminated. Was done.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the above-mentioned Japanese Patent Application Laid-Open No. 9-160.
This is an improvement of the magazine described in Japanese Patent No. 177, and is characterized by a band-shaped material for joining and fixing the side plate and the band-shaped body. When a band is wound around a rectangular box such as a magazine, the corners have the worst fit between the band and the box. In particular, when the belt-shaped material is wound with a high tension, the fit at the corners tends to decrease, and the higher the rigidity of the band, the lower the fit. As described above, the decrease in the fit between the band and the magazine causes the band to be loosened, displaced, or dislocated during transportation.

Although a strip made of a thermoplastic resin has various advantages such as low cost and easy processing, heat sealing is an important advantage when used as a magazine strip. The use of a heat seal for joining the strips wound around the magazine greatly facilitates the work. However, as a weak point of the heat seal, there is a problem that the strength of the heat seal portion is reduced.

On the other hand, for the above-mentioned fit, it is preferable to reduce the thickness of the band-shaped material to reduce the rigidity.
Further, in order to secure the positional accuracy of the magazine when the magazine is loaded into the output device, it is preferable that the band-shaped material is made as thin as possible.

However, when the magazine is simply fixed with a thin band-shaped material, there has been a problem that the heat seal portion is elongated or broken. Therefore, as a result of intensive studies to solve these problems, it has been found that a band-like material obtained by laminating at least two kinds of thermoplastic resin films having different melting points is effective.

That is, by using a laminate of at least two layers of a film made of a thermoplastic resin having a relatively low melting point and a film made of a thermoplastic resin having a high melting point, the heat of only the thermoplastic resin having a low melting point is melted. By performing the sealing, the thickness of the belt-shaped material can be reduced without lowering the strength of the heat-sealed portion.

The strip used in the present invention may have a two-layer structure, but is preferably a laminate having three or more layers.
It is a layer configuration in which a thermoplastic resin layer having a high melting point is sandwiched by a thermoplastic resin layer having a low melting point. The difference in melting point of the thermoplastic resin used here is 20 ° C. or more,
Preferably it is 50 ° C. or higher.

As the thermoplastic resin used for the strip material of the present invention, for example, homopolyethylene (LDPE, MD)
PE, HDPE), ethylene / α-olefin copolymer (L-LDPE), polypropylene, block or random copolymer of propylene / α-olefin, thermoplastic elastomer, ultra-high-molecular-weight polyethylene, nylon 6,
Nylon 66, polystyrene, polycarbonate, vinylidene chloride, polyethylene terephthalate, polyacetal resin and the like are used, and resins having different melting points are used in combination.

The melting point of the above resin can be determined, for example, as a maximum peak temperature by a differential scanning calorimetry (DSC method). The following shows typical melting points of the resin.

LDPE: 105-120 ° C L-LDPE: 110-125 ° C HDEE: 125-150 ° C Polypropylene: 150-180 ° C Thermoplastic elastomer: 90-120 ° C Nylon 6: 200-230 ° C Nylon 66: 220-250 Polystyrene: 230-250 ° C Polycarbonate: 220-270 ° C Vinylidene chloride: 190-210 ° C Polyethylene terephthalate: 260-270 ° C Polyacetal: 170-180 ° C

The strip of the present invention preferably has three or more layers. As shown in FIG. 2 (a cross-sectional view of the strip), the intermediate layer b is sandwiched between outer layers a1 and a2 made of the same resin. The configuration is more preferred. In this case, the intermediate layer b may be two or more layers, but one layer is preferable in terms of cost.

For the outer layers a1 and a2, a resin having a low melting point and good heat sealing properties is used. For example, LDP
E, L-LDPE, polypropylene, propylene / α-olefin copolymer, and the like. The intermediate layer has a melting point of 180
C. or higher, preferably 200.degree. C. or higher is used.
For example, nylon 6, nylon 66, polycarbonate,
Examples thereof include vinylidene chloride and polyethylene terephthalate. Among them, polyethylene terephthalate is particularly preferable from the viewpoint of strength and elongation resistance.

The total thickness of the strip of the present invention is 30
To 300 μm is preferable, and especially 50 to 200 μm.
m, more preferably 50 to 100 μm. When the thickness of the belt-shaped material is 50 to 100 μm, the thickness of each resin layer is such that the intermediate layer b has a thickness of 10 to 50 μm, preferably 20 to 4 μm.
0 μm, the outermost layers a1 and a2 are each 10 to 40 μm
m, preferably 15 to 35 μm. The Clark stiffness (measured according to JIS P8143) of the strip is 300
Or less, more preferably 200 or less, and even 10
0 or less is preferable.

The above resin film laminate can be manufactured by a conventionally known plastic film laminating method. For example, there are a multilayer coextrusion method, an extrusion lamination method, and the like.

FIG. 1 is a perspective view of a magazine fixed by the strip material of the present invention. Here, it is preferable that the band-shaped material 4 is wound around two places, and the width of the band-shaped material is suitably about 1 to 4 cm.

After the band material is wound around the magazine, the overlapping portion of the band material is heat-sealed, but the end of the upper band material is free of 1-2 cm (not heat-sealed).
To remain. When disassembling the used magazine, the end of the upper band-shaped material is pinched by a finger and pulled in a direction perpendicular to the heat-sealing surface, whereby the heat-sealed portion can be cut. The heat seal portion is strong against a force in the horizontal direction with respect to the surface, but relatively weak against a force in the vertical direction, as long as the thickness is used in the present invention,
Cutting can be performed with the force of fingers, and a cutting jig such as a cutter knife or scissors is not required.

According to the present invention, it is possible to obtain a practically satisfactory fixing strength only by wrapping a single band of material at one place, but it is necessary to wrap at least two wraps in preparation for severe transportation such as export. preferable. In this case, it is more preferable to heat seal every single winding than to wind two or more turns and heat seal at one place.

As described above, if the thickness of the belt-like material is increased, the fit to the magazine is reduced. Therefore, it is preferable that the thin and flexible belt-like material of the present invention is double-wrapped with one place. .

The simple disposable magazine to which the present invention is applied is provided with a groove in which the edge of the cylindrical body is fitted to the side plate in order to keep the light-shielding property of the joint between the side plate and the cylindrical body. The cylindrical body was fitted in the groove, and bonded and fixed in the groove using an adhesive.

The present invention uses a band-shaped material and does not use an adhesive, so that a practically satisfactory level of fixing strength can be obtained. However, the present invention can be applied to a magazine which is firmly bonded and fixed with a conventional adhesive. In comparison, since the magazine of the present invention has a low fixing strength, it is preferable to provide an auxiliary fixing means on the assumption that the magazine drops when transporting or handling a heavy magazine.

According to the present invention, as the auxiliary fixing means, a protrusion is partially provided in the groove of the side plate. FIG. 3 is a plan view of a side plate in which a protrusion is provided in a groove, and FIG. 4 is a partially enlarged cross-sectional view thereof. The size and number of the protrusions 7 are appropriately selected depending on the width and length of the groove, the thickness of the cardboard forming the cylindrical body, and the like. For example,
If the width of the groove is about 5 mm, the length is about 20 cm, and the thickness of the corrugated cardboard of the cylindrical body is about 4 mm, the height is 1.5 to 2 mm.
Protrusions with a width of about 5 to 10 mm are provided on each of the opposite sides.
Provide about the number.

As shown in FIG. 4, it is preferable that the projections 7 have a shape that becomes gently higher so that the cardboard of the cylindrical body can be easily fitted into the grooves. It is preferable that the height of the projections 7 is such that the projections 7 are slightly difficult to fit into the cardboard when the edge of the cardboard of the tubular body 1 is fitted into the groove 8.

The provision of the projections also has a role of assisting the side plate and the cylindrical body from being easily detached from each other in an assembling process when the magazine is fixed using the band-shaped material. In the above-mentioned Japanese Patent Application Laid-Open No. 9-160177,
Although it is described that temporary fixing is performed with an adhesive, provision of the protrusion in the groove eliminates the need for temporary fixing with an adhesive, thereby improving work efficiency.

In the present invention, the material used for the body of the magazine is preferably cardboard or corrugated cardboard in consideration of disposability, but in consideration of moisture resistance, resin, aluminum, ceramics and other materials are combined with cardboard or corrugated cardboard. It may be a composite material.

In the present invention, the material of the side plate is A
A thermoplastic resin such as BS resin and polystyrene, a mixture of paper and resin, paperboard, and other materials are also used, but preferably a thermoplastic resin is used.

The magazine of the present invention can reduce the clearance between the side surface of the roll-shaped photosensitive material and the side plate, as compared with a conventional magazine in which the cylindrical body and the side plate are firmly fixed with an adhesive. That is, since the present invention is elastically fixed by the band material, even if the clearance is reduced,
The pull-out force (pull tension) when pulling out the photosensitive material can be kept low. In addition, it is important to minimize meandering in transporting the photosensitive material in an output device such as an image setter or a plate setter. In this sense, the magazine of the present invention is very useful because the clearance between the side surface and the side plate of the roll-shaped photosensitive material can be reduced. On the other hand, when small irregularities are generated on the side surface of the roll-shaped photosensitive material due to misalignment or the like, the pull tension when the photosensitive material is pulled out becomes large, and draw-out failure may occur. Therefore, FIGS. 7 and 8
As shown in FIG.
Is preferably inserted between the side surface of the base plate and the side plate 2. The disc-shaped member 11 is preferably formed of a plastic resin plate having a thickness of about 0.2 to 5 mm. The material is preferably selected from a silicone resin, a silicon-containing resin, and a self-lubricating resin. Examples of the self-lubricating resin include polyacetal, fluorine resin, nylon, phenol resin, and high-density polyethylene. By using such a resin, the slip property is improved and a stable pull tension is obtained.

In the magazine of the present invention, there is a mode in which the slit-shaped outlet 9 is formed by folding both ends of the cylindrical body 1 inside as shown in FIG.
This is preferable because the magazine is easily assembled. When the tubular body and the side plate are fixed with the belt-like material as in the magazine of the present invention, the upper folded portion 12 or the lower folded portion 13 constituting the slit-shaped outlet 9 may be deformed during transportation or handling. . In order to avoid these problems, it is preferable to provide a convex portion corresponding to at least one folded portion on the side plate.

FIG. 10 is a plan view of the side plate corresponding to FIG. In FIG. 10, reference numeral 14 denotes the upper folding part 1 of FIG.
2 are convex portions corresponding to 2. It is necessary that the shape and size of the convex portion 14 are substantially the same as those of the upper folded portion 12, and that the convex portion 14 can be inserted into the space of the upper folded portion 12 when the side plate and the cylindrical body are joined. The two upper and lower protrusions 14 are provided when assembling the side plate and the cylindrical body.
This is because the assembling work is performed so that the side plate can be applied from either the left or the right. The height of the convex portion 14 is substantially the same as the height of the frame portion 15 for forming the groove 8, which is sufficiently effective.

The protruding portion 14 may correspond to one of the folds forming the slit-shaped outlet 9, but is preferably provided so as to correspond to the upper fold 12. In order to prevent the slit-shaped outlet 9 from being deformed, it is better to correspond to the upper and lower folded portions, but from the viewpoint of assembly workability, only the upper portion is preferable.

[0042]

The present invention will be described below with reference to examples. Example 1 As a magazine of the present invention, a magazine joined and fixed with a band-shaped material without using any adhesive as shown in FIG. 1 was produced.
The side plate is made of ABS resin, and the cylindrical body is made of cardboard. Protrusions as shown in FIGS. 3 and 4 were provided in the grooves of the side plates. The size of the roll-shaped photosensitive material stored in the magazine is 25.4 cm in width and 61 m in roll length. The belt-shaped material is a laminated film having a total thickness of 75 μm in which a 25 μm thick polypropylene film is laminated on both sides of a 25 μm thick polyethylene terephthalate film with a three-layer configuration. The width of the strip is 3 cm and the Clark stiffness is 30. After winding the band-shaped material around the magazine once, the overlapped portion was heat-sealed. At this time, 1.5 cm of the end of the upper strip was left.

On the other hand, a conventional magazine having a thickness of 400
A magazine was prepared in the same manner except that a μm propylene resin film was used as the strip material. The stiffness of this strip is 1700. A method was used in which the protrusions were not provided in the grooves of the side plates, but were temporarily fixed in spots with an adhesive.

The above-mentioned magazine of the present invention and the conventional magazine were prepared in a quantity of 10 each, and after performing the following vibration test,
The condition and performance of the magazine were investigated. The results are shown below. <Vibration test> Vibration conditions: amplitude: 2.54 cm, frequency: 4.24 Hz, acceleration: 1.0 G, time: 1 Hr, vibration direction: three directions of width, length, and height

<Appearance> There was no change in any of the ten magazines of the present invention. In the conventional magazines, the belt-shaped material was loosened or misaligned in all of the ten magazines, and the joint between the side plate and the cylindrical body had rattling.

<Pull tension of photosensitive material: pull tension> Measuring method: measuring instrument (CPU gauge manufactured by Aiko Engineering Co., Ltd.), pull speed 80 cm / min, pull length 1
00 cm. Measurement results: The magazines of the present invention were 450 to 5 for all 10 magazines.
It was stable at 00 gf. Conventional magazines are 200-
The pull tension greatly fluctuated between 600 gf.

<Light-shielding property> Test method: Irradiate the magazine at 3000 lx for 10 minutes. Test result: No fogging occurred on the photosensitive material in all of the ten magazines of the present invention. In the conventional magazines, fogging occurred in all of the ten magazines due to light leakage from the joint between the side plate and the cylindrical body or the slit-shaped outlet.

Example 2 According to Example 1, a magazine of the present invention was prepared. However, the belt-shaped material was wound twice and heat-sealed one by one. Further, using the side plate shown in FIG. 10, a disk-shaped member (made of polyacetal and having a thickness of 2 mm) shown in FIG. 7 was inserted between the side surface of the roll-shaped photosensitive material and the side plate. Ten magazines of the present invention were prepared, and the vibration test of Example 1 was repeated three times, and the test was performed under more severe conditions.

As a result of the test, the appearance was such that the band-shaped material was tightly wound in all ten pieces, and the side plate and the tubular body were completely fixed. Pull tension is 450 ~ for all 10 pieces
It was stable at 500 gf. There were no problems with the light-shielding properties of all 10 samples.

[0050]

As can be seen from the above results, the magazine of the present invention does not loosen the joint between the side plate and the cylindrical body even by vibration during transportation, etc., and retains the performance such as light-shielding properties and pull tension. can do. Further, by providing the protrusions in the grooves of the side plates, the retention of the above performance is further improved. Further, since the thickness of the band-shaped material can be reduced, the setting property for the output device is improved. Furthermore, when the magazine is disassembled after use, the end of the heat-sealed portion of the band-shaped material can be pulled by a finger and broken, so that cutting tools such as scissors and cutters are not required for cutting the band-shaped material as in the past. Becomes

Since the magazine of the present invention does not use any adhesive for fixing the cylindrical body and the side plate, the side plate and the body disassembled after using the photosensitive material can be reassembled and used as a magazine. It has become possible. Further, in the case of recycling and collecting magazines after use of the photosensitive material, the advantages such as space saving in storage and transportation can be obtained by decomposing the empty magazines. Due to these effects, environmentally friendly products could be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magazine according to the present invention.

FIG. 2 is a cross-sectional view of a strip used in the present invention.

FIG. 3 is a plan view of a side plate of the magazine of the present invention.

FIG. 4 is a partially enlarged sectional view of the upper plate.

FIG. 5 is a perspective view of a conventional magazine.

FIG. 6 is a plan view of the upper plate.

FIG. 7 is a plan view of the disc-shaped member.

FIG. 8 is a sectional view of a magazine using a disk-shaped member.

FIG. 9 is a side view of the tubular body before the side plate is mounted.

FIG. 10 is a plan view of the side plate of the present invention corresponding to FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical fuselage 2 Side plate 3 Photosensitive material 4 Strip material 7 Projection

Claims (6)

[Claims] 1. A cylindrical body having a slit-shaped outlet,
In a roll-shaped photosensitive material magazine comprising side plates that support the roll-shaped photosensitive material by closing the side surfaces, the cylindrical body and the side plates are formed by laminating at least two or more thermoplastic resins having different melting points. A roll-shaped photosensitive material magazine, which is fixed by bonding with a strip having a thickness of 300 μm or less. 2. The method according to claim 1, wherein the band material has a thickness of 30 to 200 μm,
Clark stiffness (JISP-8143) is 300 or less,
2. The magazine for a roll-shaped photosensitive material according to claim 1, which has heat sealability. 3. The roll-shaped photosensitive material according to claim 1, wherein the side plate has a groove into which an edge of the cylindrical body is fitted, and a projection is provided in the groove. magazine. 4. The magazine for a roll-shaped photosensitive material according to claim 1, wherein the belt-shaped material is wound at least two times and the cylindrical body and the side plate are joined and fixed. 5. The magazine for a roll-shaped photosensitive material according to claim 1, wherein a disk-shaped member is inserted between a side surface of the roll-shaped photosensitive material and the side plate. 6. The slit-shaped outlet is formed by folding both end surfaces of a cylindrical body into each inside, and a convex portion corresponding to a shape of the at least one folded portion is provided on a side plate. Item 4. The magazine for roll-shaped photosensitive material according to item 1.