JPH04234025A - Sheet film pack - Google Patents

Abstract

PURPOSE:To improve operability and portability when photographing by using a sheet film pack where plural sheet film units are laminated/housed. CONSTITUTION:A film pack 2 is used in such a manner that it is loaded on a pack holder 20 when photographing, and an ejecting path 11 and a recovery port 12 for ejecting and recovering the sheet film unit 4 completely photographed, decides an opening 3a are formed on a pack main body 3. Light shielding teremps 9, 13, and 14 are provided on the ejecting path and the recovery port 12, and in a state where the opening 3a is covered with a slide 5, the inside of the pack main body 3 is maintained on light tightness irrespective of photographing before or after, and even if the film pack 2 is removed from the pack holder 20, the sheet film unit 4 housed inside is not exposed to external light.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet film pack in which a plurality of sheet films are stacked and stored, and these sheet films can be sequentially photographed.

0002

2. Description of the Related Art Large-sized cameras such as view cameras and studio cameras are used to take photos for creating product catalogs and photos that are intended to be enlarged. The size of the film used in large cameras is 4 x 5 inches or more, and it is particularly effective when sharpness is required. Some of these large-sized cameras have large photographic plates and sheet films replaced each time a photograph is taken, but this cannot be done quickly when photographing is to be carried out repeatedly.

[0003] For this reason, a film package known from US Pat. No. 4,821,054 and the like is known. This film package consists of a light-shielding paper envelope, a light-shielding carrier sheet slidably enclosed within the envelope,
It is composed of two sheet films whose back surfaces are bonded to the front and back sides of a carrier sheet, respectively. Then, attach the film package so that it touches the exposure frame of the camera,
Photographing is performed by pulling out only the light-shielding envelope so that the sheet film and the carrier sheet remain in the exposure frame of the camera, and then the light-shielding envelope is pushed in and the sheet film is stored in the light-shielding envelope again to complete one photographing session. When taking a second photo, the entire film package is removed from the camera, turned over, and the same procedure as the first photo is taken.

[0004]Furthermore, the film holder known from US Pat. No. 3,021,772, U.S. Pat. It consists of an outer frame that is attached to the outer frame, and an inner frame that is housed within the outer frame. About 5 to 10 sheets of film are stacked and stored in the inner frame, and a slideable lid is provided to shield an exposure opening formed on the front surface of the inner frame from light. In addition, the inner frame itself can slide freely relative to the outer frame, so after attaching the outer frame to the camera, by alternately sliding the lid and inner frame, the photographed film can be moved to the bottom layer of the inner frame. At the same time, a new film is set in the top layer, which is the shooting position. Therefore, by operating the sliding lid and the inner frame, it is possible to take pictures for the number of sheets of film.

[0005]

[Problems to be Solved by the Invention] However, among the above-mentioned conventional techniques, film packages using light-shielding envelopes have the disadvantage that they can only be photographed twice at most, and it is difficult to insert and remove paper light-shielding envelopes. Because of the manual operation, there was a problem with the reliability of the operation. On the other hand, the above-mentioned photo frame or film holder has the advantage of being able to take about 5 to 10 shots in sequence, but if it is expected that many more shots will be taken in succession,
You will need to prepare several photo frames or film holders. Therefore, not only is there a problem with portability when shooting in a studio, but also when shooting outdoors such as mountain photography, and after shooting with one film holder, the outer frame of a new film holder must be replaced. It had to be positioned and attached to the camera, and improvements in operability were desired.

The present invention has been made to solve the problems of the prior art described above, and provides a sheet film that can be used to quickly take multiple shots and is also highly portable. The purpose is to provide a pack.

[0007]

[Means for Solving the Problems] In achieving the above object, the present invention addresses the problem that in conventional film holders, the outer frame and inner frame cannot be separated, which causes various problems. Focusing on this, we designed a pack holder that is attached to a camera in the same way as the outer frame, in which sheet films are stacked and stored, and the pack body, which is equipped with a sliding lid for light shielding, can be separated. Even if the pack body is separated from the pack holder, the sheet film stored therein is not exposed to light, so that the discharge path for the photographed sheet film provided in the pack body and the photographed sheet film are received from the pack holder. The collection port is equipped with a light shielding means, and when the lid is closed, the inside of the pack body is maintained in a light-tight state regardless of whether before or after photographing.

[0008]

[Embodiment] In FIG. 1, a film pack 2 to which the present invention is applied includes a box-shaped pack body 3, a plurality of sheet film units 4 stacked and stored inside the box-shaped pack body 3, and a front side of the pack body 3. It is provided with a sliding lid 5 for opening and closing the formed opening 3a. The sliding lid 5 is larger in size than the sheet film unit 4, and is slidable along a groove 3b formed on the inner surface of the side wall of the pack body 3. As shown in FIG. 2, the sheet film unit 4 includes a sheet film 4a having a size of 4 x 5 inches, and a thin metal plate that supports the base surface of the sheet film and whose four sides are bent to surround the four edges of the sheet film 4a. It is composed of a sheath 4b made of Note that the sheath 4b can be made of plastic as long as the sheet film 4 maintains its flatness and has sufficient strength.

As shown in the main part sectional view of FIG. 3, for example, six sheet film units 4 are stacked and housed in the pack body 3, and a pressure plate is fixed at one end to the inner wall of the back of the pack body 3. It is pressed toward the front side by a spring 7. As a result, the sheet film unit 4 is pressed onto the bottom surface of the sliding lid 5. A handle 5a is attached to the sliding lid 5, and the sliding lid 5 can be pulled out from the pack body 3 through the slit 8. As shown in FIG. 3, a light-shielding telescope 9 is fixed to the inner wall of the slit 8, and even if the lid 5 is completely pulled out, no light will enter into the pack body 3 through the slit 8.

[0010] A discharge passage 11 is provided on the front side of the pack body 3 and is open to one end of the opening 3a, and a slit-shaped collection port 12 is formed below the discharge passage on the back side of the pack body. ing. The discharge path 11 and the collection port 12 have a width or a slit width that allows the sheet film unit 4 to move in the longitudinal direction. A light-shielding telescope 13 is attached to the lower wall surface forming the discharge passage 11, and when the sliding lid 5 is closed as shown in FIG. 3, outside light enters into the pack body 3 from the discharge passage 11. Never. A telescope 14 is also provided on the inner wall of the collection port 12 to prevent outside light from entering the pack body 3 from the collection port 12 as well. Note that one end of the telescope 14 on the collection port side is fixed to a support plate 15 that is biased by a spring in a direction that closes the collection port 14, thereby ensuring reliable light shielding.

As shown in FIG. 1, the film pack 2 is inserted into a pack holder 20 for use. Pack holder 2
0 is provided with an insertion opening 21 for inserting the film pack 2, as well as an exposure opening 22 smaller in size than the sheet film unit 4. This pack holder 20 is attached so that the front surface in which the exposure opening 22 is formed is in close contact with the exposure frame of a large format camera.
A protrusion 23 for positioning is provided on the front surface of the 0. Of course, well-known techniques may be used as they are for attaching and positioning the pack holder 20. Pack holder 2
0 is provided with four spring plates 25 whose one end is fixed to the front inner wall, and when the film pack 2 is inserted into the pack holder 20, the opening 3a of the pack body 3
Press the entire film pack 2 downward in the figure at a position that does not fit within the outline. Furthermore, when the film pack 2 is inserted into the pack holder 20, the pack body 3
A pair of stop plates 26 are fixed to partially enter the recovery port 12 formed in the.

A wedge-shaped key 28 is provided on the side wall of the pack body 3. Then, insert the film pack 2 into the pack holder 20, and press the key 28 into the pack holder 20.
When pushed by the inner wall of the hook 29, the hook 29 moves to the release position. When the key 28 is protruded as shown, the hook 29 engages with a lock portion 30 provided on the handle 5a to prevent the lid 5 from being pulled out. Therefore, normally, the lid 5 cannot be pulled out unless the pack body 3 is inserted into the pack holder 20. Incidentally, the reference numeral 31 indicates a counter disk, which increments and displays the number of photographed images each time a new sheet film unit 4 is set at the photographing position after photographing.

[0013] The effect of the above configuration will be explained. As shown in FIG. 4, the pack holder 20 is attached to the exposure frame 35 of a large format camera with the film pack 2 inserted therein. Thereafter, as shown by arrow 40, the lid 5 is pulled out and then reinserted. The sliding lid 5 is pulled out and the opening 3
When a is completely opened, the first sheet film unit 4a is pushed up by the pressure plate spring 7. Then, the sheet film unit 4a passes through the opening 3a,
The pack holder 20 moves to the photographing position pressed against the lower side of the exposure aperture 22. Thereafter, when the sliding lid 5 is pushed in again, the sliding lid 5 enters between the first sheet film unit 4a and the second sheet film unit 4b set at the photographing position, as shown in FIG. Further, when it is detected that the sliding lid 5 is inserted into the position shown in FIG. 5, the hook 29 engages with the lock portion 30. Then, by opening and closing the shutter of the large format camera in the state shown in Figure 5,
Exposure is performed on the first sheet film unit 4a.

After completing the first photographing operation, the user grips the handle 5a and pulls out the film pack 2 from the pack holder 20 as shown in FIG. As mentioned above, since the hook 29 has moved to the lock position, the handle 5
Even if a pull-out operation is performed with a, only the lid 5 is not pulled out from the pack body 3, and the entire film pack 2 is pulled out from the pack holder 20. When the film pack 2 is pulled out, the U.S. Patent No. 302
Since the exposed first sheet film unit 4a is locked in the same position by a well-known mechanism known from Publication No. 1772, etc., the sheet film unit 4a passes through the ejection path 11 and comes out of the pack body 3. Teyuki,
When the film pack 2 is pulled out to the position shown in FIG.
into the bottom of the pack holder 20. The position of the left end portion of the sheet film unit 4a is regulated by the stop plate 26.

Note that since the shutter of the camera is in a closed state, no light enters through the exposure opening 22, and the insertion opening 21 is blocked by the film pack 2 itself, so that light from the surroundings does not enter the sheet film unit 4a. will never reach. Furthermore, since the sliding lid 5 closes the opening 3a of the pack body 3, even when the film pack 2 is pulled out from the pack holder 20, external light does not reach the sheet film unit 4 inside the pack body 3.

When the film pack 2 is inserted into the pack holder 20 in this state, the sheet film unit 4a
Since the left end portion is regulated by the stop plate 26, it enters the pack main body 3 through the collection port 12 from the right end side. The sheet film unit 4a that has entered the pack body in this manner rides on the pressure plate spring 7 as shown in FIG. 7, and is inserted into the lowermost layer of the unexposed sheet film units 4. Then, the pack body 3 is attached to the pack holder 20
is fully inserted and key 28 is pressed, hook 29
rotates to release the lock on the lock portion 30. Therefore, the state is the same as that shown in FIG. 4 except that the photographed sheet film unit 4a is collected in the lowest layer of the pack body 3, and the second sheet film unit 4b is located directly below the sliding lid 5. From then on, it is possible to photograph the second sheet film unit 4b using the same procedure.

By repeating the above-described procedure, the counter disk 31 is advanced, and when all the sheet film units 4 stored in the pack body 3 have been photographed, an end mark is displayed on the counter disk 31. Further, sheet film units 4, all of which have been photographed, are stacked on top of the pack body 3 in the order of photographing, and the opening 3a is covered with a sliding lid 5. By pulling the handle 5a, the film pack 2 can be taken out from the pack holder 20 while maintaining the light shielding state. When photographing is to be continued, a new film pack 2 can be inserted into the pack holder 20 without removing the pack holder 20 from the exposure frame 35. Therefore, for example, when shooting outside a studio, one pack holder 20 may be shared and several film packs 2 may be held.
You will be able to take pictures using

[0018]

[Effects of the Invention] As detailed above, according to the sheet film pack of the present invention, the pack body itself has a light-shielding function, and can be separated from the pack holder attached to the camera regardless of before or after shooting. Since the sheet film stored inside is maintained light-tight even when shooting, multiple sheet film packs can be shared with one pack holder. This is advantageous in terms of portability, as long as the number of sheet film packs corresponding to the number of shots is prepared. In addition, since sheet film packs can be loaded and unloaded with the pack holder attached to the camera, there is no need to position and attach the pack holder to the camera each time after using one sheet film pack. This also greatly improves operability.

[Brief explanation of the drawing]

FIG. 1 is an external view of a pack holder and a film pack.

FIG. 2 is a partially cutaway perspective view of the sheet film unit.

FIG. 3 is a sectional view of a main part of the film pack.

FIG. 4 is a sectional view of essential parts showing the pack holder and film pack in an initial state.

FIG. 5 is a cross-sectional view of essential parts showing the pack holder and film pack during photographing.

FIG. 6 is a sectional view of a main part of the film pack pulled out from the pack holder.

FIG. 7 is a cross-sectional view of a main part of the film pack being returned to the pack holder.

[Explanation of symbols]

2 Film pack 3 Pack body 4 Sheet film unit 5　Lid 7 Pressure plate spring 9, 13, 14 Telemp 11 Discharge port 12 Collection port 25 Leaf spring

Claims (1)

[Claims] Claim 1: A sheet film pack that is used by being loaded into a pack holder having an opening for photographing formed on the mounting surface for a camera, in which a plurality of sheet film units each consisting of a sheet film and a sheath holding the same are laminated. A pack body with a built-in pressure plate spring that stores the stacked sheet film units and presses the stacked sheet film units from the back wall to the front wall and presses the uppermost sheet film unit to the exposure opening formed in the front wall; and the pack body. a sliding lid that is slidably provided to open and close the exposure opening;
an ejection path that allows the photographed sheet film unit to move from the pack body into the pack holder by pulling out the pack body by a certain amount from the pack holder after photographing; A collection port that guides the photographed sheet film unit ejected into the pack holder under the stacked sheet film units inside the pack body when the pack is pushed into the pack holder, and a sliding lid in the closed position. A sheet film comprising a light shielding member that cooperates with the light shielding member to shield the discharge path from light, and a light shielding member that shields the collection port from light, and maintains the sheet film unit in a light-tight state even when separated from the pack holder. pack.