JP2003149770A - Sheet film pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the incidence of external light on films within a sheet film pack from the clearance between a pull cap and a sliding contact surface of the pack body of the sheet film pack. SOLUTION: A V-shaped groove 30 is formed at the pack body. A teremp member 35 lined with an elastic plate 34 is ultrasonically welded to an inclined surface 30a on a film housing chamber side of the groove 30. The elastic plate 34 imparts elasticity to the teremp member 35. The elastic plate 34 and the teremp member 35 are wider in their widths than the width of the inclined surface 30a and are formed larger in the segments projected from the groove 30 without being joined to the inclined surface 30a. The projecting segments curve and come into tight contact with the inside surface of the pull cap 5 and therefore the incidence of the external light from the clearance between the pull cap 5 and the sliding contact surface of the pack body into the inside is obstructed. Since both the ends in the longitudinal direction of the elastic plate 34 and the teremp member 35 are respectively inserted into the inner side of the grooves of guide rails, the external light incident along the grooves of the respective guide rails is shut off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a sheet film pack, and more particularly to a sheet film which surely prevents external light from shining through the gap between the sliding lid and the sliding contact surface of the pack body to the inside film. It's about packs.

[0002]

2. Description of the Related Art A sheet film pack is used by loading it in a pack holder and enabling continuous shooting with a large-sized camera by inserting and removing a pulling lid. In the main body of the sheet film pack, a plurality of sheet film units each having a 4 × 5 inch sheet film stored in a sheath are stacked and stored.

For example, in the sheet film pack proposed by the present applicant in Patent Document 1, a partition plate for regulating the end position of the sheet film unit is formed inside the end portion of the pack body. Between the lower end surface of the partition plate and the inner wall surface of the back surface of the pack body, there is formed a slit-shaped opening for accommodating the exposed sheet film unit in the lowermost layer of the sheet film unit. A cap member that shields the opening is detachably attached to the tip of the pack body.

A claw member is provided inside the cap member, and the claw member is engaged with the engaging hole of the pull lid to connect the pull lid and the cap member. When the film pack is loaded into the pack holder and the lid of the pack holder is closed, the projection formed on the inner wall of the lid pushes down the projection of the claw member and moves the claw member with the closing operation. The connection with the cap member is released.

After the film pack is loaded in the pack holder and the lid of the pack holder is closed, the pulling lid is pulled to a predetermined position, whereby the uppermost sheet film unit moves from the opening of the pack body to the exposure position of the holder body. . Inside the front wall of the holder main body that defines the exposure position and in which the exposure opening is formed, a plurality of leaf springs for urging the photographed sheet film unit toward the rear inner wall of the holder main body are attached. .

When the lid is returned to its original position, the lid is inserted between the uppermost sheet film unit and the next sheet film unit. After that, when the shutter of the camera is opened and closed to take a picture and then the pulling lid is pulled, the inner frame provided inside the holder body slides out while holding the pack body. At this time, since the photographed sheet film unit remains locked at the exposure position by engaging with the protrusion formed on the inner wall of the holder body, the leaf spring moves toward the inner wall side of the back surface of the holder body. It can be pressed.

Subsequently, when the pulling lid is pushed back to its original position, the pack main body returns to the original position of the holder main body together with the inner frame. At this time, the exposed sheet film units are stored in the lowermost layer of the laminated sheet film units through the openings of the lower end surface of the partition plate and the back inner wall surface of the pack body. By repeating the above operation, it is possible to continuously shoot all the sheet film units stored in the pack body.

Further, the pack main body is provided with a counter storage chamber in addition to the film storage chamber for storing the sheet film unit, and the counter display plate is stored in the counter storage chamber through the opening portion on the side of the lid. The counter display plate is rotated stepwise by receiving a mechanical displacement signal on the holder main body side every time the above operation is performed once. For this reason, a signal receiving opening for receiving the displacement signal is formed in the counter storage chamber.

Further, a pressing plate having a spring portion which is moved up and down by engaging with a reverse rotation preventing claw formed on the peripheral edge of the counter display plate is provided on the pulling lid side opening side. This holding plate is used after the last sheet film unit has been shot.
The counter display plate is raised along with the stepping motion, and the upper end of the counter display plate engages with the engaging hole of the lid to lock the lid.

[0010]

[Patent Document 1] JP-A-5-341379

[0011]

Due to its function, the signal receiving opening is always in an open state, and is in a state in which outside light can easily be emitted. The light emitted from the signal receiving opening is normally blocked by the lid, but when the end of the spring part of the holding plate is directly contacted with the inner surface of the lid, the spring force of the holding plate causes the lid to cover. Will result in being pushed up,
External light may reach the film inside through the gap between the sliding lid and the sliding contact surface of the pack body.

The present invention has been made in consideration of the above circumstances, and provides a sheet film pack that reliably prevents external light from shining into a film inside from a gap between a sliding lid and a sliding contact surface of a pack body. The purpose is to

[0013]

In order to achieve the above object, a sheet film pack of the present invention is formed on a pack main body for accommodating a plurality of sheet film units in a stacked manner and a front wall of the pack main body. An opening that exposes the uppermost sheet film unit and a slide lid that is slidably incorporated through a pair of guide rails formed on both edges of the pack body, and a slide lid that opens and closes the opening, and the slide lid is slid. A sheet film pack provided on the sliding contact surface of the pack body and having a telescopic member for preventing external light from entering the inside of the pack body through a gap with the pulling lid, wherein the sliding contact surface of the pack body has a cross-sectional shape. A V-shaped groove is formed at a right angle to the sliding direction of the lid, and at least the inclined surface of the groove on the opening side is lined with a telemeter member having an elastic plate, the edge of which is outside the groove. It is obtained by sticking to protrude. Further, the telemper member lined with the elastic plate is such that both ends thereof are inserted into the inside of the groove of the guide rail.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2, a sheet film pack 1 to which the present invention is applied is a box-shaped pack main body 3 having a removable cap member 2 at the leading end thereof, and is stacked and housed therein. A plurality of sheet film units 4,
It is provided with a pulling lid 5 with a handle 5a for opening and closing an opening 3a formed in the front surface of the pack body 3.

The pulling lid 5 is larger in size than the sheet film unit 4, and by pushing and pulling by holding the grip 5a, the grooves 6a and 7a of the pair of guide rails 6 and 7 formed on both edges of the pack main body 3 are formed. Can be slid along. As shown in FIGS. 3, 4 and 5, the sheet film pack 1 with the pulling lid 5 completely inserted.
Has a length D ₁ , a width D ₂ , and a height D ₃ of, for example, 209 mm, 116.6 mm, and 19.9 mm, respectively.
Also, the width D ₄ of the pack body 3 and the height D _{5 of the} cap member 2
Are, for example, 106.9 mm and 22.6 mm, respectively.

As shown in FIG. 6, the cap member 2 has a claw member 8 inside. This claw member 8 has a claw 8a,
8b is formed, and these engage with locking holes 5b, 5c formed on the tip side of the pulling lid 5 to lock the pulling lid 5 to the cap member 2. The claw member 8 has a bifurcated spring portion 8 at the bottom thereof.
c and 8d, which are always urged toward the pulling lid 5.

Further, the claw member 8 is formed with projections 8e, 8f at right angles to the claws 8a, 8b, and these are projected from the openings 2a, 2b of the cap member 2.
The openings 2a and 2b are wide in the moving direction of the claw member 8. The amount of protrusion of the protrusions 8e and 8f from the openings 2a and 2b is the same as the height of the protrusions 9 provided on the left and right of the openings 2a and 2b, so that the protrusions 8e and 8f are not accidentally pressed. ing.

When the film pack 1 is loaded into the pack holder 10, the projections 8e and 8f are pushed down by the projections on the side of the pack holder 10 which will be described later, and the claws 8a and 8b.
Is disengaged from the engaging holes 5b and 5c that were engaged. Further, a groove 2c is formed on the upper portion of the cap member 2,
When the film pack 1 is loaded in the pack holder 10, the protrusion on the pack holder 10 side engages with the film pack 1 to lock the cap member 2 in the pack holder 10.

The claw member 8 is vertically movably enclosed in the cap member 2 by a sheath receiving portion 13. The sheath receiving portion 13 is composed of a lid portion 13a and a receiving portion 13b for receiving the end portion of the exposed sheet film unit 4. The tip of the lid 5 can be inserted into the cap member 2 above the sheath receiving portion 13, and the tip 3b of the pack body 3 and the tip 6b and 7b of the guide rails 6 and 7 can be capped below and to the left and right thereof. A gap is provided so that each member 2 can be inserted.

A partition plate 3c for regulating the end position of the sheet film unit 4 is provided inside the tip portion 3b.
It is provided with a gap between it and the back inner wall 3e of the pack body 3. This gap is a recovery port 14 for receiving the exposed sheet film unit 4.

In FIG. 1 showing the relationship between the tip portions 6b, 7b of the guide rails 6, 7 and the cap member 2, the tip portion 6 is shown.
b and 7b extend from the outer wall of the partition plate 3c to the tip 3b side, and are inserted inside the cap member 2 when the cap member 2 is mounted on the tip 3b, and the tips of the guide rails 6 and 7 are inserted. External light leakage from the gap between the portions 6b and 7b and the cap member 2 is prevented. The extension length D ₆ of the tip portions 6b and 7b is determined based on the experimental results on the light-shielding property and the operability shown in Table 1 below, and is, for example, 3 to 7 mm, more preferably 4 to 6 mm.

[0022]

[Table 1]

A stepped portion 5d (see FIG. 4) is formed on the inner surface of the pulling lid 5 on the side of the handle 5a, which engages with the end portion of the pack body 3 and extends toward the cap member 2 side of the pulling lid 5. Since the movement is blocked, the cap member 2 is in a state in which the tip portion of the pulling lid 5 is connected to the cap member 2 by the claw member 8.
Does not come off from the pack body 3.

As shown in FIG. 7, the sheet film unit 4 includes a sheet film 15 of 4 × 5 inch size,
It is composed of a plastic sheath 16 for housing this. The sheath 16 includes a bottom portion 16 a that supports the base surface side of the sheet film 15 and the sheet film 1.
5 of the partition plate 3c, and a groove 16b formed so as to surround three sides except one side.

As shown in FIG. 4, for example, 10 sheet film units 4 are stacked and stored in the film storage chamber 3d of the pack body 3, and a pressure plate spring having one end fixed to the inner wall of the back surface of the pack body 3. It is pressed to the front side by 17. As a result, the uppermost sheet film unit 4 is pressed against the inner surface of the pulling lid 5.

8 and 9, a box-shaped counter storage chamber 20 is formed at the end of the pack body 3, and a circular counter display plate 21 is rotatably dropped therein. There is. Then, from above, the spring portion 22a
A pressing plate 22 provided with is provided so as to be guided by the guide groove 20a of the counter storage chamber 20, and a shield plate 24 that shields the pulling lid side opening 20b of the counter storage chamber 20 from above.
Is covered. The shielding plate 24 has holes 20c, 20d, 2 in which the projections 24a, 24b, 24c formed at the three corners are formed at corresponding positions in the counter storage chamber 20.
By fitting with 0e, it is fixed to the opening 20b on the pulling lid side.

The opening 20b on the pulling lid side of the counter storage chamber 20
Is shielded by the shielding plate 24, so that even if external light is emitted from the feed claw receiving opening 20f formed on the inner wall of the back surface of the counter storage chamber 20 that receives the counter feed claw of the pack holder 10, this external light is emitted. Reaching the sheet film 15 in the pack body 3 is prevented. Further, since the spring portion end 22b of the pressing plate 22 is regulated by the inner wall surface of the shielding plate 24, the pulling lid 5 is not pushed up by the spring force of the pressing plate 22, and the sliding contact surface 3f of the pack body 3 is prevented. It is also prevented that the gap between the lid and the lid 5 becomes large.

Although an opening 24d into which the upper end 22c of the pressing plate 22 is loosely inserted is formed in a part of the shielding plate 24, the amount of light leaking from the gap between the edge of the opening 24d and the upper end 22c is extremely small. Therefore, there is no problem because the sliding cover 3 on which the sliding lid 5 is slid allows the sliding cover 3f to shield the light, which will be described later. In addition, the projection 24 for fixing the shield plate 24 to the pulling lid side opening 20b.
a to 24c and holes 20c to 20e, the feed claw receiving opening 2
Although the number is three because of the space of 0f, it may be four as a matter of course.

The lower end 22d of the pressing plate 22 is always in contact with the reverse rotation preventing claw 21a formed on the peripheral edge of the counter display plate 21. The reverse rotation preventing claw 21a is provided with one tooth for each number indicating the number of shootable images, for example, "1", "2", ..., "10", and the heights thereof are the same, Only the portion corresponding to the end mark “E” is higher than the others, and the upper surface is flat.

As a result, the upper end 22c of the pressing plate 22 is held at a predetermined distance from the inner wall surface of the pulling lid 5 through the opening 24d during shooting, but the last sheet film unit 4 is held. After the sheet is exposed and the sheet film unit 4 is stored in the pack body 3, the pressing plate 22 is lifted so that the upper end 22c is the locking hole 5f of the pulling lid 5.
, And the lid 5 is locked to the pack body 3 so as not to be pulled out.

On the periphery of the back surface of the reverse rotation preventing claw 21a, the above "1", "2", "3", ..., "10" and "E".
Is stamped, and the counter display window 20 for observing this is displayed.
g is formed on the back inner wall of the counter storage chamber 20.

Two holes 27, 28 and a notch 29 are formed in the pack body 3 near the counter storage chamber 20. From the holes 27 and 28, the claw portions of the latch mechanism provided on the slide frame of the pack holder 10 project, and these engage with the locking holes 5b and 5c to regulate the pulling range of the pulling lid 5. Further, the notch 29 has a protrusion formed on the inner surface of the pulling lid 5 described later.

A V-shaped groove 30 is formed between the film storage chamber 3d of the pack body 3 and the counter storage chamber 20, as shown in FIG. On the inclined surface 30a of the groove 30 on the film storage chamber 3d side, as shown in FIG.
A telescopic member 35 lining the elastic plate 34 is ultrasonically welded. The elastic plate 34 imparts elasticity to the telescopic member 35 and has the same width as the telescopic member 35.
Or rather wide, for example polyethylene terephthalate (P
ET).

The widths of the elastic plate 34 and the telescopic member 35 are
It is considerably wider than the width of the inclined surface 30a, and the portion which is not joined to the inclined surface 30a and protrudes from the groove 30 is large (A). This part is curved and brought into close contact with the inner surface of the pulling lid 5 when the pulling lid 5 is inserted into the grooves 6a and 7a of the guide rails 6 and 7 (B). External light is prevented from entering the inside through the gap between the surface 3f and the lid 5.

The length D of the elastic plate 34 and the telescopic member 35
₇ is a distance D ₈ between the grooves 6a and 7a of the guide rails 6 and 7, for example, 109.2 mm which is almost close to 109.4 mm.
The ends of the elastic plate 34 and the telescopic member 35 are inserted to the insides of the grooves 6a and 7a. As a result, it is possible to block the external light incident along the grooves 6a and 7a of the guide rails 6 and 7.

Although the elastic plate 34 and the telescopic member 35 may be rectangular, the welding portion with the inclined surface 30a has a length D so that ultrasonic welding work with the inclined surface 30a can be easily performed.
_It is slightly shorter than ₇ and is almost the same as the distance between the guide rails 6 and 7 (for example, 107.2 mm).

A stepped portion 5g is provided on the inner surface of the pulling lid 5, and a thickness D ₁₀ on the handle 5a side and a thickness D ₁₁ on the front end side of the pulling lid 5 are provided.
And there is a step (B). This thickness D ₁₀ , D ₁₁
Is, for example, 1.2 mm and 1.0 mm, and the step is 0.2 mm
Is. In this way, by making the thickness D ₁₀ of the pulling lid 5 on the handle 5a side larger than the thickness D ₁₁ on the tip side, both smooth insertion and removal of the pulling lid 5 and light shielding properties are satisfied.

10, 12 and 13 showing the pack body 3, the total length D ₁₂ of the pack body 3 is 195.0 m.
m, the total length D ₁₃ of the guide rails 6 and 7 is 191.0 mm,
The length D ₁₄ from the tips of the guide rails 6 and 7 to the inner wall surface of the partition plate 3c is 184.5 mm. A boss 20h that rotatably supports the counter display plate 21 is formed in the center of the counter storage chamber 20.

The distance D ₁₅ between the center of the boss 20h and the tip portion 3g of the pack body 3 is 18.0 mm, and the distance D ₁₆ between the center of the boss 20h and the counter display window 20g is 8.0 mm. The diameter of this boss 20h is 4.0 mm.
The notch 29 has different left and right edge lengths, one length D ₁₇ is 5.0 mm and the other length D ₁₈ is 7.0 mm.
Further, a shape is formed in which these portions are connected by a straight line portion and an arc having a radius R ₁ (3.5 mm). Further, a notch 37 is formed in the tip portion 3g, and the width D ₁₉ thereof is 9.0 mm.
It has become.

The length D ₂₀ of the feed claw receiving opening 20f is 1
The distance D ₂₁ is 2.0 mm, and the distance D ₂₁ from the tip 3 g to the end of the feed claw receiving opening 20 f is 10.0 mm. The counter display window 20g has a rectangular shape, and the length D ₂₂ of the short side is 3.4.
mm, and the long side length D ₂₃ is 5.4 mm. Similarly, hole 27 is D ₂₄ (3.6 mm) × D ₂₅ (5.4 mm), hole 2
8 is D ₂₆ (5.4 mm) × D ₂₇ (8.2 mm).
The distance D ₂₈ from the tip 3g to the hole ₂₈ is 25.8.
mm.

The length D ₂₉ from the tip portion 3g to the outer wall 3h of the counter storage chamber 20 is 5.0 mm, and the counter storage chamber 2
The length D ₃₀ to the inner wall 20i of 0 is 29.5 mm, the length D ₃₁ to the film storage chamber 3d is 54.0 mm, and the length D ₃₂ to the groove 30 is 36.0 mm. The distance D ₃₃ between the front end of the groove 30 and the partition 3i of the film storage chamber 3d is 1
It is 6.0 mm.

Partition plate 3c of the film storage chamber 3d
A ridge portion 39 is formed on the inner wall of the rear side near the end portion to regulate one end position of the pressure plate spring 17. This ridge 39
Has a height D ₃₄ of 1.0 mm, and the surface on the side of the partition plate 3c is a taper surface having an angle θ ₁ , for example 60 °, with respect to the vertical line of the inner wall surface of the back surface of the film storage chamber 3d.

14 and 15 showing the pulling lid 5,
The total length D _{35 of the} lid 5 is 205.5 mm, the length D ₃₆ from the end face of the handle 5a to the stepped portion 5g is 49.0 mm, and the handle 5d is engaged with the tip 3g of the pack body 3 from the stepped portion 5d. The distance D ₃₇ to the end face of 5a is 14.4 mm. The width D ₆₁ of the pulling lid 5 is 109.2 mm ± 0.1 mm, and the width D ₆₂ of the stepped portion 5g is 104.8 mm. Further, both ends of the handle 5a are tapered, and the taper angle θ ₂ is 60 °.

When the pulling lid 5 is returned to the fixed position, the slide prevention claw (not shown) of the knob 70 attached to the inner surface of the lid 51 of the pack holder 10 sneaks in to allow the knob 70 to slide. The short side D _{38 of the} shaped hole 5e is 4.0 m.
m, the long side D ₃₉ is 7.0 mm, and the distance D ₄₀ from the end surface of the handle 5a is 18.0 mm. Short side D of locking hole 5f
₄₁ is 2.4 mm, long side D ₄₂ is 4.4 mm, and handle 5
The distance D ₄₃ from the end face of a to the middle of the locking hole 5f is 3
It is 1.0 mm.

An elongated groove 5i is formed on the inner surface of the pulling lid 5. This is a film pack 1 with a pack holder 1
For safety, carry the lid 5
The pull lid lock dial of the pack holder 10 that locks is locked. The length D ₄₄ of this groove 5i is 14.
It is 0 mm. Further, on the inner surface of the pulling lid 5, a projection 5j which is inserted into the notch 29 of the pack body 3 at a distance D ₄₅ (20.0 mm) from the end surface of the handle 5a and a width D _{46 which} is engaged with the notch 37 of the pack body 3. A protrusion 5k (6.0 mm) is formed.

The projection 5k is for pressing a predetermined member of the pack holder 10 which displays a signal that the preparation for photographing is completed, when returning the pulling lid 5 once pulled out. Further, the projection 5j engages with a predetermined member of the pack holder 10 after the preparation for photographing is completed, so that the pulling lid 5, the pack body 3, and the slide frame of the pack holder 10 are integrally pulled out from the holder body 10a. It is something to do.

The length D ₄₇ of the locking holes 5b and 5c is 5.6 mm.
The distance D ₄₈ between them is 60.4 mm. Further, the lower surface of the tip portion 5p of the pulling lid 5 is formed in a tapered shape,
Its width D ₄₉ is 1.5 mm. The distance D ₅₀ from the tip portion 5p to the locking holes 5b and 5c is 3.5 mm (see FIG. 15).
(See (B)), the width D ₅₁ of the locking holes 5b and 5c is 1.5 mm
Is. The engaging holes 5b and 5c have tapered edges on the handle 5a side, and the inclination θ ₃ thereof is 45 °.

The thickness D _{52 of the} handle 5a is 5.0 mm,
Its width D _{53 is} also 5.0 mm. The height D ₅₄ from the upper surface of the protrusion 5j is 4.4 mm, and the height D ₅₅ from the upper surface of the protrusion 5k _.
Is 6.4 mm. The width D _{56 of the} groove 5i is 2.2 mm, and the distance D ₅₇ from the end surface of the handle 5a to the groove 5i is 11.
It is 0 mm.

As shown in FIG. 2, the pack holder 10 in which the film pack 1 is loaded and used is a holder body 1 as shown in FIG.
0a, a lid 51 rotatably attached thereto, and a slide frame 52 slidably attached in the holder body 10a. The lid 51 is provided with an exposure opening 53 which is smaller in size than the sheet film unit 4, and the back surface of the lid 51 is a receiving surface 54 for receiving the upper surface of the sheet film unit 4 and positioning the sheet film unit 4 at the exposure position. Has become.

A pair of grooves 54a are formed in the longitudinal direction of the receiving surface 54, and two leaf springs 56 each having one end fixed to the bottom surface of the groove 54a are provided in total of four. The leaf spring 56 presses the pack body 3 downward in the drawing when the film pack 1 is loaded in the pack holder 10 and the lid 51 is closed. Further, as will be described later in detail, these leaf springs 56 also have a function of pressing the sheet film unit 4 at the exposure position from above.

In the vicinity of the hinge of the lid 51, a ridge 57 for engaging the groove 2c of the cap member 2 to lock the cap member 2 in the pack holder 10 when the film pack 1 is loaded.
And the protrusions 8e and 8f of the claw member 8 are pushed down to push the claws 8a and 8f.
A pair of protrusions 58 are formed to separate b from the engaging holes 5b and 5c of the lid 5. Further, near the short side of the exposure opening 53 on the inner wall surface of the lid 51, there is fixed a telem member 59 for preventing outside light from entering through a gap between the inner wall surface of the lid 51 and the pulling lid 5.

Inside the box portions 60a and 60b provided on the rear end side of the slide frame 52, the slide movement of the slide frame 52 with the holder body 10a is controlled, and the counter display plate 21 is stepped. It has a built-in mechanism.
The claws 61 and 62 protruding from the openings formed in the upper walls of the boxes 60a and 60b are engaged with the locking holes 5b and 5c when the opening 3a is fully opened, and the pulling range of the pulling lid 5 is restricted. And so on.

A slide lid lock dial 63 is rotatably attached to the center of the front portion of the slide frame 52. The lid lock dial 63 is provided to prevent the lid 5 of the film pack 1 from being inadvertently operated when the film pack 1 is carried while being loaded in the pack holder 10. By manually rotating this, the arcuate peripheral end portion is engaged with the groove 5i formed on the inner surface of the lid 5, and the lid 5 is locked to the slide frame 52. Further, an arc-shaped projection 64 is provided near the lid lock dial 63. On the back side, a window is provided which can be seen from the photographer side when the pack holder 10 is attached to the camera, and a red protrusion, for example, is displayed here when the preparation for photographing is completed.

On the front surface of the pack holder 10, as shown in FIG. 16, the pack holder 10 is provided with an exposure frame 66 of a large format camera.
The ridges 67 and 68 for positioning are formed. Further, reference numeral 69 is a telem member that prevents external light from entering through a gap between the sliding contact surface on which the slide frame 52 is slid and the inner wall surface of the holder body 10a.

When the film pack 1 thus constructed is loaded into the pack holder 10 and the lid 51 is closed, the ridge 57 engages with the groove 2c so that the cap member 2 is held by the holder 10.
It is held between a and the lid 51. Then, the protrusions 8e and 8f are pushed down by the protrusion 58 to move the claw member 8 to the back side, and the claws 8a and 8b are engaged with the engaging holes 5b and 5c of the pulling lid 5.
The lid 5 is unlocked because it is disengaged.

The pack holder 10 is attached to the exposure frame 6 of a large format camera.
When the pulling lid 5 is pulled out to the position shown in FIG. 17 after being attached to the tray 6, the opening 3a of the pack body 3 is completely opened, and
The first sheet film unit 4a is pushed up by the pressure plate spring 17. Then, the sheet film unit 4a passes through the opening 3a and is pressed against the receiving surface 54 of the pack holder 10. At this time, the slide frame 52 is attached to the holder body 10 by the latch mechanism incorporated in the box portion 60a.
The slide frame 52 is locked to a, and the slide frame 52 is not slid with the pulling operation of the pulling lid 5.

Then, when the pulling lid 5 is returned to its original position, as shown in FIG.
As shown in FIG. 8, the slide lid 5 is inserted between the first sheet film unit 4a and the second sheet film unit 4b, and the sheet film unit 4 at the exposure position is exposed.
The flatness of a is secured. At this time, the pulling lid 5 is locked to the pack body 3 and the engagement between the holder body 10a and the slide frame 52 is released by the latch mechanism incorporated in the box portion 60a. Further, a display indicating that the preparation for photographing is completed is displayed on the window of the arc-shaped projection 64 seen from the photographer side. By opening and closing the shutter of the large format camera in this state,
The first sheet film unit 4a is exposed.

When the grip 5a is gripped and pulled after the first photographing is completed in this way, as shown in FIG. 19, the slide frame 52 and the film pack 1 are left while leaving only the cap member 2 inside the pack holder 10. Are integrally drawn from the pack holder 10. At this time, the edge portion 5 of the receiving surface 54
Since the exposed first sheet film unit 4a is locked in the same position by 4b, the sheet film unit 4a passes from the pack main body 3 through the gap between the upper surface of the pulling lid 5 and the receiving surface 54. Get out.

The sheet film unit 4a pulled out from the pack body 3 is attached to the holder body 10a by the leaf spring 56.
Is pushed to the inner wall side of the back. At this position, a slide frame restricting means (not shown) acts, and the slide frame 5 is further moved.
You will not be able to withdraw 2. At this time, the lid 5
Since the opening 3a of the pack main body 3 is closed, even if the film pack 1 is pulled out from the pack holder 10, outside light does not reach the sheet film unit 4 in the pack main body 3.

Next, the film pack 1 is attached to the slide frame 52.
When the sheet film unit 4a is inserted into the holder body 10a together with the sheet film unit 4a, the rear end of the sheet film unit 4a is regulated by the sheath receiving portion 13. Spring 17
And is inserted in the lowermost layer of the unexposed sheet film unit 4.

In this way, when the film pack 1 is completely inserted into the holder body 10a together with the slide frame 52, the counter feeding claws incorporated in the box portion 60a are inserted through the feeding claw receiving opening 20f to the counter display plate. The counter display plate 21 is rotated one step by one step by engaging with a claw portion formed on the lower surface of the counter 21. As a result, the number indicating the number of shootable images displayed on the counter display window 20g becomes "1."
It is changed from "0" to "9". Then, the state is the same as that of FIG. 16 except that the second sheet film unit 4b is located directly below the pulling lid 5. After that, it is possible to take pictures one after another by repeating the same operation.

When the tenth sheet film unit 4 is photographed by repeating the above-mentioned procedure and the film pack 1 is pulled out and inserted, the exposed sheet film unit 4 is placed in the pack body 3 in the order of photographing. A state in which they are stacked from above and the opening 3a is covered with the pulling lid 5 (see FIG.
6)).

When all the images of one film pack 1 have been photographed in this way, "E" indicating that the number of photographable images has become zero is displayed in the counter display window 20g and the height corresponding to this is high. The upper end 22c of the pressing plate 22 is raised by the reverse rotation preventing claw 21a.
c engages with the engagement hole 5f of the pulling lid 5 through the opening 24d of the shield plate 24. As a result, the lid 5 is moved to the pack body 3
Locked in. At the same time, since the lid 51 is unlocked, the knob 70 is operated to open the lid 51.

Since the pressing of the projections 8e and 8f by the projection 58 is released with the rotation of the lid 51, the claw member 8 is lifted by the urging of the springs 8c and 8d, and the claws 8a and 8b are engaged with the engaging hole 5b. , 5c and the cap member 2 and the lid 5 are connected. On the other hand, since the stepped portion 5d of the pulling lid 5 is engaged with the end portion of the pack body 3, the cap member 2 is locked to the pack body 3. Then, since the pressing of the cap member 2 by the protruding portion 57 is released, the used film pack 1 can be taken out from the pack holder 10.

It should be noted that the dimensions of the respective portions shown in the above-described embodiments are merely examples, and it goes without saying that the present invention is not limited to these numerical values. Also, the telemp member 3
Although the groove 5 of FIG. 5 is fixed to the inclined surface 30a by ultrasonic welding, it may be fixed by, for example, a hot melt adhesive or the like.

[0066]

As described above in detail, according to the sheet film pack of the present invention, a groove having a V-shaped cross section is formed on the sliding contact surface of the pack body with the sliding lid at a right angle to the sliding direction of the sliding lid. However, since at least the inclined surface of the groove for film exposure on the opening side is fixed to the telemping member lined with the elastic plate so that the edge portion thereof protrudes to the outside of the groove, even if the sliding lid moves in the thickness direction. The telem member is always in close contact, and it is possible to reliably prevent external light from shining through the gap between the sliding lid and the sliding contact surface of the pack main body to the internal film. Moreover, since both ends of the telem member lined with the elastic plate are inserted into the inside of the groove of the guide rail, it is possible to reliably block the external light incident from the gap between the pulling lid and the guide rail.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a relationship between a tip portion of a guide rail and a cap member.

FIG. 2 is an external view of a sheet film pack and a pack holder.

FIG. 3 is a plan view of the sheet film pack as viewed from above.

FIG. 4 is a side sectional view of the sheet film pack.

FIG. 5 is a front view of a sheet film pack.

FIG. 6 is an exploded perspective view showing a structure of a cap member.

FIG. 7 is a perspective view of a sheet film unit.

FIG. 8 is an exploded perspective view showing a structure of a counter storage chamber.

FIG. 9 is an explanatory diagram showing a state in which the shield plate is removed from the counter storage chamber and a state in which the telescopic member is fixed.

FIG. 10 is a side sectional view of the pack body.

FIG. 11 shows a state in which a telescopic member is fixed in a groove, and a relationship between the sliding lid and the telescopic member.

FIG. 12 is a plan view seen from above the pack body.

FIG. 13 is a plan view seen from the back side of the pack body.

FIG. 14 is a plan view of the lid.

FIG. 15 is a side view and a cross-sectional view of the lid.

FIG. 16 is an end view of essential parts showing the pack holder and the sheet film pack in the initial state.

FIG. 17 is an end view of essential parts showing the pack holder and the sheet film pack in a state where the pulling lid is pulled out from the initial state.

FIG. 18 is an end view of essential parts showing the pack holder and the sheet film pack at the time of photographing.

FIG. 19 is an end view of essential parts showing the pack holder and the sheet film pack in a state where the slide frame is pulled out after photographing.

[Explanation of symbols]

1 film pack 3 pack body 3f sliding contact surface 5 Sliding lid 6,7 Guide rail 6a, 7a, 30 groove 30a inclined surface 34 Elastic plate 35 Telemp member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hitoshi Komiyama             Fuji Photo, 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture             Within Film Co., Ltd. (72) Inventor Katsumasa Okada             Fuji Photo, 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture             Within Film Co., Ltd. (72) Inventor Hirokatsu Nagai             Fuji Photo, 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture             Within Film Co., Ltd. (72) Inventor Yoshio Hara             Fuji Photo, 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture             Within Film Co., Ltd. F-term (reference) 2H020 CA01 CA02

Claims (2)

[Claims] 1. A pack body for accommodating and stacking a plurality of sheet film units, an opening formed on a front wall of the pack body for exposing a topmost sheet film unit, and formed on both edges of the pack body. Provided on the sliding contact surface of the pack main body, which is slidably incorporated via the paired guide rails and which opens and closes the opening, and the sliding contact surface of the pack main body on which the sliding cover is slid. In a sheet film pack having a telescopic member for preventing entry into the main body, a groove having a V-shaped cross section is formed on the sliding contact surface of the pack body at a right angle to the sliding direction of the lid, and at least the groove is formed. A sheet film pack characterized in that a telemping member lined with an elastic plate is fixed to the inclined surface on the opening side so that an edge portion thereof protrudes out of the groove. 2. The sheet film pack according to claim 1, wherein both ends of the telemping member lined with the elastic plate are inserted to the inside of the groove of the guide rail.