JPH072448Y2 - Container cap for photographic film cartridges - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cap of a container for storing a photographic film cartridge.

[Conventional technology]

Conventionally, as a container for photographic film cartridges,
There is one as shown in FIG. 6 or FIG. 6 (Japanese Patent Laid-Open No. 62-291).
639 publication).

In FIG. 5, reference numeral 1 is a container body, and reference numeral 2 is a container cap. The container body 1 includes a bottom portion 3 and a peripheral wall portion 4, and a fitting groove 5 is formed inside the upper portion of the peripheral wall portion 4.

The container cap 2 is formed with a bent portion 7 that is folded back in a substantially U shape from around the circular top surface portion 6, and a flange portion 8 is formed outward from the upper end of the bent portion 7. . Further, a fitting protrusion 9 that fits into the fitting groove 5 is formed on the outer surface of the bent portion 7.

In such a container, the photographic film cartridge 10 has a main body of the cartridge as shown by a chain double-dashed line in the figure.
A long boss 12 of a spool projecting from the cartridge main body 1 is housed inside the container main body 1 so as to substantially correspond to the inside of the container cap 2.

In FIG. 6, the container body 1 is composed of a bottom portion 3 and a peripheral wall portion 4, and a fitting projection portion 19 is formed on the outer side of the upper end of the peripheral wall portion 4.

The container cap 2 is formed with a bent portion 7 that is folded back in a substantially U-shape from around the circular top surface portion 6, extends outward from the upper end of the bent portion 7, and is then bent downward. Mating piece 13
Are formed.

In such a container, the photographic film cartridge 10 has a main body of the cartridge as shown by a chain double-dashed line in the figure.
A long boss 12 of a spool projecting from the cartridge body 11 is housed inside the container body 1 so as to substantially correspond to the inside of the container cap 2.

[Problems to be solved by the device]

The conventional container for photographic film cartridges described above is a photographic film that sometimes has scratches and white powder and has a bad appearance because the photographic film cartridge rotates or moves up and down in the container during vibration during transportation and processing packaging process. The photographic film cartridge has a tendency to be cracked or whitened due to the impact when it adheres to the tongue and adversely affects the photographic property, or when it is dropped.

The present invention solves the above problems and causes scratches and white powder,
An object of the present invention is to provide a container cap for a photographic film cartridge that can prevent cracks, whitening and the like.

[Means for Solving the Problems]

By the way, as a result of the study by the present inventor, it was found that the cause of scratches and white powder generation, cracks, whitening, etc. is that the photographic film cartridge is stored in a free state without being fixed in the container. .

That is, in a non-stationary state such as a packaging process or a distribution process, the photographic film cartridge rotates, the peripheral wall of the container body is worn by the exposed tongue of the film, and the additives crystallized by bleeding out on the surface are scraped off. Was generated.

Further, when the container drops, the photographic film cartridge vibrates, the load acting on the container body increases, and cracks, whitening, etc. are likely to occur.

The present invention was made as a result of the above research, and provided with a means for fixing a photographic film cartridge to a container cap,
It is intended to achieve the above object.

That is, the container cap for a photographic film cartridge according to the present invention has a melt index (ASTM D-1238) of 7
~70g / 10 min, density (ASTM D-1505) is 0.90~0.94g / cm ^3,
Bending rigidity (ASTM D-747) is formed of resin with 1000 to 5000 kg / cm ² , and a pressure contact part that presses the end surface of the photographic film cartridge stored in the container body for the photographic film cartridge is formed. The photographic film cartridge is sandwiched between the bottom surface and the press-contact portion to be in a substantially fixed state.

Another container cap for photographic film cartridges according to the present invention is a melt index (ASTM D-123
8) is 7-70g / 10 minutes, density (ASTM D-1505) is 0.90-0.94
g / cm ³ , flexural rigidity (ASTM D-747) 1000-5000 kg / cm ²
The resin is used to hold the photographic film cartridge in the container body for holding the photographic film cartridge's spool, and the gripping force of the gripping portion causes the photographic film cartridge to be in a substantially fixed state. It is characterized by that.

The pressure contact portion and the grip portion are for maintaining the photographic film cartridge in a substantially fixed state.For example, the pressure contact portion and the container body may be used together to pinch the body of the photographic film cartridge, the spool, or the like. Holds the spool of the film cartridge.

The substantially fixed state by the pressure contact portion or the grip portion does not need to be fixed so as not to move completely, and may be any degree that can reduce rotation or vibration in a normal physical distribution state, a dropped state, or the like. That is, the photographic film cartridge does not have to be completely sandwiched, and the pressure contact portion or the gripping portion may simply contact the photographic film cartridge.
The relationship between the pressure contact portion or the grip portion and the photographic film cartridge is that the distance between the pressure contact portion or the grip portion and the photographic film cartridge is approximately 0 mm, and the pressure contact portion or the grip portion is approximately 2 mm into the space occupied by the photographic film cartridge. It is preferable.

The resin composition and size / shape of the container cap for a photographic film cartridge are appropriately selected so that the container cap has a sufficient fitting property and that the pressing portion or the gripping portion can flexibly hold down the photographic film cartridge.

The container cap for a photographic film cartridge according to the present invention is a principle test condition according to melt index {ASTM D-1238. For example, for polyolefin resin, the test load is 2.16kgf and the test temperature is 190 ℃ (polyethylene resin).
And a value measured at 230 ° C. (polypropylene resin)} is 7 to 70 g / 10 min of the resin. When the resin has a melt index of less than 7 g / 10 minutes, the fluidity of the molten resin is poor, and many molding failures such as short shot, warpage, and twist occur, and the molding cycle becomes long. If the melt index exceeds 70 g / 10 minutes, the resin will become too soft and the ribs of the container cap will be crushed or sticking out poorly, and threading, gate residue, burrs, and other molding failures will frequently occur.

In addition, the resin composition has a softer density (AS
TM D-1505) is 0.90 to 0.94 g / cm ³ , flexural rigidity (ASTM D-7
47) is preferably a homopolyethylene resin of 1000 to 5000 kg / cm ² or an ethylene / α-olefin copolymer resin or a mixed resin containing 50% by weight or more of any of these resins, and a lubricant, an antistatic agent, an antioxidant. Agents and the like can be added.

In particular, a resin composition containing a lubricant, an antistatic substance, or an antioxidant in the resin composition and having a melt index of 7 to 70 g / 10 min is preferable.

As for dimensions, the average thickness is 0.3 to 5.0 mm, especially 0.5.
It is preferable that the thickness is ˜5.0 mm.

The photographic film cartridge container body may be the same as the conventional one.

In the present invention, a photographic film cartridge is a J-135 photographic film, which is a spool of photographic film wound in a metal or synthetic resin cartridge body. The contact portion of the photographic film cartridge with the pressure contact portion or the grip portion may be the spool or the cartridge body.

[Action]

In the container cap for the photographic film cartridge of the present invention,
The press-contact portion or the grip portion maintains the photographic film cartridge in a substantially fixed state by itself or in cooperation with the container body for the photographic film cartridge, and prevents movement in a distribution process or the like.

〔Example〕

An embodiment of a container cap for a photographic film cartridge according to the present invention will be described with reference to FIG.

FIG. 1 is a vertical sectional view of a photographic film cartridge container. In this figure, the top surface portion 6 of the container cap 2 for photographic film cartridge is formed lower than the flange portion 8 and the pressure contact portion 14 is formed on the inner side surface of the top surface portion 6 so as to project in a mountain shape.

The other shapes of the photographic film cartridge container cap and the shape of the photographic film cartridge container body 1 are as follows.
This is the same as the conventional example shown in FIG.

When the photographic film cartridge is stored in the photographic film cartridge container as described above, the press contact portion 14 deforms and presses the end surface of the long boss 12 of the spool, as shown by the two-dot chain line in the figure. As a result, the photographic film cartridge 10 is sandwiched between the pressure contact portion 14 and the bottom portion 3 and fixed in the container.

FIG. 2 is a vertical sectional view of another embodiment.

In this embodiment, a pressure contact portion 15 is formed in an annular shape on the lower end surface of the bent portion 7 of the photographic film cartridge cap 2.

The other shapes and the shape of the photographic film cartridge container body 1 are the same as those of the conventional example shown in FIG. 5, except that the gate portion of the photographic film cartridge container cap 2 has a thick portion 20. is there.

When the photographic film cartridge is housed in the photographic cartridge container as described above, the press contact portion 15 deforms and presses the upper end surface of the cartridge body 11 as shown by the chain double-dashed line in the figure. As a result, the photographic film cartridge 10 is
It is clamped between the bottom part 3 and the bottom part 3 and fixed in the container.

FIG. 3 is also a vertical sectional view of another embodiment.

In this embodiment, a photographic film cartridge container cap 2 is used.
A grip portion 16 is formed in an annular shape on the inner surface of the bent portion 7.

The shape other than the gate portion of the photographic film cartridge container cap 2 and the shape of the photographic film cartridge container body 1 are the same as those of the conventional example shown in FIG.

When the photographic film cartridge is stored in the photographic film cartridge container as described above, the long boss 12 of the spool is press-fitted into the grip portion 16 as shown by the two-dot chain line in the figure.
It is fixed in the container by gripping 16.

FIG. 4 is also a vertical sectional view of another embodiment.

In this embodiment, a pressure contact portion 17 protruding in a mountain shape is formed on the lower surface of the top surface portion 6 of the container cap 2 for a photographic film cartridge, and a grip portion 18 is formed on the inner surface of the bent portion 7 in a semicircular cross section. And it is formed in a ring shape.

The shape of the photographic film cartridge container cap 2 other than the gate portion and the shape of the photographic film cartridge container body 1 are the same as those of the conventional example shown in FIG.

When the photographic film cartridge is housed in the photographic film cartridge container as described above, the press contact portion 17 presses the spool 12 while deforming the end face of the spool 12, and the grip portion 18 is press fitted, as indicated by the two-dot chain line in the figure. Grasp the spool 12 and fix the photographic film cartridge 10 in the container.

Next, the test results comparing the characteristics of the present invention product and the conventional product will be described.

The product of the present invention corresponds to the shape shown in FIG. 2, and the protruding distance of the pressure contact portion 15 (the length of the pressure contact portion 15 entering the space occupied by the photographic film cartridge 10) is formed to be about 2 mm.

Conventional product The conventional product corresponds to the shape shown in FIGS. 5 and 6, that is, the shape obtained by removing the press contact portions 14, 15, 17 and the gripping portions 16, 18 from the product of the present invention.

For both the device of the present invention and the conventional product, the container cap has a melt index (ASTM D-1238, the same below) of 23 g / 10 minutes, a density (ASTM D-1505, the same below) of 0.926 g / cm ³ , and a bending rigidity (A
STM D-747) uses a high-pressure branched low-density polyethylene resin of 1700 kg / cm ² and the container body has a melt index of 40.
g / 10 min, density 0.901 g / cm ³ , flexural modulus (ASTM D-790)
Is 14000 kg / cm ² and the ethylene content is 2.5% by weight
The propylene / ethylene random copolymer resin was used.

Testing method 36 sheets of normal 35mm film (roll film J-135) Photo film Patrone (Fujicolor Super HR II)
Was stored, and after being vibrated for 20 minutes vertically and 20 minutes left and right under conditions of a vibration tester at a frequency of 550 times / min and an amplitude of 5 mm, a visual inspection was performed.

Test results In the conventional product, white powder frequently adhered to the tongue of the photographic film, and scratches frequently occurred on the inner wall of the container body, resulting in a decrease in transparency.

In the product of the present invention, almost no white powder adhered to the tongue of the photographic film, scratches did not occur on the inner wall of the container body, and the transparency was not deteriorated.

Also, when shaken up and down by hand, the conventional product rattled loudly and the photographic film cartridge moved up and down and felt a shock to the hand, but this product did not produce sound and the photographic film cartridge did not move up and down. I could not feel the impact.

[Effect of device]

The present invention provides a pressure contact portion or a grip portion on the container cap for a photographic film cartridge so that the pressure contact portion or the grip portion fixes the photographic film cartridge in the container, and the photographic film cartridge does not vibrate or rotate. There is no generation of white powder due to abrasion with the tongue of the main body or photographic film and no decrease in transparency due to scratches, no damage or bending of the tongue of the photographic film, and deterioration of the light-shielding property of the light-shielding ribbon or the portro of the Patrone Nothing. Further, even if the container is accidentally dropped, the occurrence of cracks or whitening on the container body is reduced. In addition, rattling noise does not occur when carrying around.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a container cap for a photographic film cartridge according to the present invention, FIGS. 2 to 4 are vertical sectional views of other embodiments, and FIGS. 5 and 6 are conventional drawings. It is a longitudinal cross-sectional view of an example. 1 …… Body for photographic film cartridge 2 …… Cap for photographic film cartridge 10 …… Photo film cartridge 14,15,17 …… Pressing contact part 16,18 …… Grip part

Claims (2)

[Scope of utility model registration request] 1. A melt index (ASTM D-1238) of 7
~70g / 10 min, density (ASTM D-1505) is 0.90~0.94g / cm ^3,
Bending rigidity (ASTM D-747) is formed of resin with 1000 to 5000 kg / cm ² , and a pressure contact part that presses the end surface of the photographic film cartridge stored in the container body for the photographic film cartridge is formed. A container cap for a photographic film cartridge, characterized in that the photographic film cartridge is sandwiched between the bottom surface and the pressure contact portion to be substantially fixed. 2. A melt index (ASTM D-1238) of 7
~70g / 10 min, density (ASTM D-1505) is 0.90~0.94g / cm ^3,
Bending rigidity (ASTM D-747) is formed of resin with 1000 to 5000 kg / cm ² , and a gripping part that holds the peripheral surface of the spool of the photographic film cartridge stored in the main body of the photographic film cartridge is formed. A container cap for a photographic film cartridge, characterized in that the photographic film cartridge is brought into a substantially fixed state by the gripping force of the gripping portion.