JPH0523417B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a film unit drawing device, and more particularly to a device for automatically drawing out an exposed film unit through a developer spreading roller. It is something.

[Prior art]

As shown in FIG. 1, a peel-apart type film unit 10 includes a photosensitive sheet 1, an image-receiving sheet 2, a drawer sheet 3 glued to the photosensitive sheet 1 for pulling out these sheets in a stacked manner, and an image-receiving sheet 2. The photosensitive sheet 1 is made up of a transport sheet 4 adhered to the photosensitive sheet 1 and the drawer sheet 3, and a developer pot 7 provided near the connection between the photosensitive sheet 1 and the drawer sheet 3. Also, as described later, the film unit 1
Tab 6 to be withdrawn prior to withdrawal of 0
is glued near the end of the drawer sheet 3,
The other end is glued to a tab provided on the film unit that has already been pulled out. The unit pull-out end 5 has a tapered shape with a narrow width on the tip side so that it can easily enter between a pair of developing rollers to be described later.

As shown in FIG. 2, the film unit 10 is stacked and housed in a film pack 13 which has an exposure aperture 11 on one side and a unit drawer opening 12 on one end. After loading this film pack 13 into a camera bag 16 equipped with a pair of developing rollers 15, when an effect is applied, the exposure aperture 11
through the photosensitive surface 1a of the photosensitive sheet 1 (see FIG. 1).
is exposed to light and a negative image is formed there. Thereafter, when the tab 6 protruding from the opening 17 of the camera bag 16 is pulled, the drawer sheet 3 and photosensitive sheet 1 advance toward the unit drawer opening 12.
At the same time, the conveyor sheet 4 moves toward the unit drawer opening 12 from the portion adhered to the drawer sheet 3, so the puller sheet 3 and the conveyor sheet 4 advance in an overlapping state. Then, the pull-out end 5 of the pull-out sheet 3 passes through the pull-out opening 12 of the film pack 13 and enters between the pair of developing rollers 15. The pair of unfolding rollers 15 are pressurized so that they rotate close to each other, but since the thickness of the pull-out sheet 3 is thinner than the gap between the unfolding rollers 15, the pull-out end of the pull-out sheet 3 easily passes between the developing rollers 15 and emerges from the opening 18 of the camera bag 16.

When the tab 6 is further pulled and the adhesion position of the drawer sheet 3 and the tab 6 approaches the unfolding roller 15, the pulling direction of the tab 6 becomes nearly perpendicular to the drawer sheet 3, so the tab 6 is pulled out of the drawer. sheet 3
Peel it off. Incidentally, at this point, the tab of the next film unit comes out from the opening 17 of the camera bag 16.

Subsequently, when the unit drawer end 5 is pulled, the pullout sheet 3 and the conveyance sheet 4 overlap and pass between the developing rollers 15, and then the photosensitive surface 1a of the photosensitive sheet 1 and the image receiving surface 2a of the image receiving sheet 2 are overlapped. They overlap and advance between the developing rollers 15,
Before these enter between the developing rollers 15, the developer pot 7 is crushed by the developing rollers 15, so that the developer flows out between the photosensitive surface 1a of the photosensitive sheet 1 and the image receiving surface 2a of the image receiving sheet 2. . When the drawer end 5 is further pulled, the photosensitive sheet 1 and the image-receiving sheet 2 advance while being pressurized by the developing roller 15, so that the photosensitive surface 1a and the image-receiving surface 2a are brought into close contact with each other, and the developer is evenly spread between them. be done. When the photosensitive sheet 1 and the image-receiving sheet 2 finish passing between the developing rollers 15, the developer is spread between the entire surfaces of the photosensitive surface 1a and the image-receiving surface 2a, and the negative image formed on the photosensitive surface 1a is transferred to the image-receiving surface. 2a as a positive image, and after a predetermined fixing time, when the photosensitive sheet 1 and the image-receiving sheet 2 are separated, a photographic image can be obtained on the image-receiving surface 2a of the image-receiving sheet 2. Processing for one unit is thus completed, and subsequent imaging and processing can be repeated in the same manner.

Conventionally, the operation of pulling out the film unit after taking a photograph using the film unit described above, that is, the operation of pulling out the tab 6 and the operation of pulling out the unit drawer end 5, has been performed by directly pulling it out by hand. There is. Therefore, each time the shutter is released, the above-mentioned pull-out operation must be repeated manually, which is extremely troublesome. In addition, especially when pulling out the film unit manually, since there are individual differences in the direction or speed of pulling out,
The film unit is forced to enter the developing roller under various conditions, which is disadvantageous in obtaining stable photographic images.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned prior art, and it is an object of the present invention to enable a tab and a film unit to be automatically pulled out under certain conditions when a shutter is released. .

[Structure of the invention]

To achieve the above object, in the present invention, a tab pull-out means and a unit pull-out means are disposed movably between first and second rollers arranged at a predetermined interval, and further between these rollers. and a third roller that selectively contacts either of the rollers, and these rollers are attached to a common support means. After the third roller is pressed against the first roller so as to sandwich the tab therebetween, the supporting means is moved in the direction of pulling out the tab, and the first roller is rotated to pull out the tab. Thereafter, the supporting means is returned to its original position, the third roller is brought into pressure contact with the second roller so that the unit pull-out end is held between them, and then the second roller is rotated to pull out the film unit. These drive sequences are performed by controlling the drive timing of the first motor, which selectively displaces the third roller and moves the support means, and the second motor, which rotates the first and second rollers, using a control means. It is structured as follows.

[Configuration of Example]

In FIG. 2, a film pack 1 containing a peel-apart type film unit 10 is shown.
3 is loaded into the camera bag 16. The exposure aperture 19 formed in the film back 16 is aligned with the exposure aperture 11 of the film back 13, and is connected to the microscope 2 through the adapter 20.
It is installed on 2. The adapter 20 is provided with an imaging lens 23 and a shutter 24 as shown in the figure. A drawer device 25 to which the present invention is applied is installed close to the tab drawer opening 17 and the film drawer opening 18 provided in the camera bag 16.

As shown in FIG. 3, the drawer device 25 includes a pedestal 40 and a movable table 42 that is slidable with respect to the pedestal 40. As shown in FIG. A shaft 43 is rotatably supported on the moving table 42, and a center roller 44 is provided at the center of the shaft 43.
However, side rollers 45 are fixed to both sides thereof. Furthermore, a roller 47 is fixed to a shaft 46 that is rotatably supported by the moving table 42.
The shafts 43 and 46 are connected to the motor 26 via a gear train 48.
The shaft 43 is rotated counterclockwise and the shaft 46 is rotated clockwise. Note that axis 4
Reverse rotation of gears 3 and 46 is prohibited by a one-way clutch (not shown) provided in gear train 48.

A rotating lever 50 is pivotally attached to a shaft 49 fixed to the moving table 42 . A driven roller 51 is rotatably supported on one end side of the rotating lever 50.
A pair of cam followers 53 are rotatably supported at the other end via a shaft 52.

The moving table 42 is further provided with a shaft 55 rotatably. The shaft 55 is provided with a control cam 56 for controlling the rotation of the rotation lever 50 via the pair of cam followers 53, and a movable base 42.
A pair of cams 57 are each fixed to move the cams 57 relative to the base 40. A spring 59 is suspended between the shaft 52 and the movable table 42, and the rotating lever 50 is biased counterclockwise, so that the cam follower 53 is brought into contact with the cam surface of the control cam 56. Furthermore, since the movable table 42 is biased rightward in the figure by a spring 60 suspended between it and the pedestal 40, the cam surface of the cam 57 hits the cam follower 62 fixed to the pedestal 40. The stopping position is determined by touching.

A free roller 66 is rotatably supported by an arm 65 that is rotatable with respect to the movable table 42 via a shaft 64. 66 is in contact with the side roller 45 and rotates as a result. Note that the free rollers 66 are also provided on both sides corresponding to the side rollers 45.

Note that the front rising portion 41 of the pedestal 40 has a side end portion of the camera bag 16, that is, an opening 1.
A recessed portion 41a for receiving the portions 7 and 18 formed therein, a long hole 41b into which the tab 6 enters, and a long hole 41c into which the pull-out end 5 of the film unit 10 enters are formed. Although not shown in FIG. 3, the cam 57 is provided with a pin 72 for closing the timing switches 70, 71 in accordance with the amount of rotation thereof, as shown in FIG. When the cam 57 rotates counterclockwise in FIG. 4 and the narrow diameter part of the cam 57 rotates relative to the cam follower 62, that is, when the moving table 42 moves to the far right in FIG. At this time, the timing switch 70 is turned on, and immediately before the large diameter portion of the cam 57 separates from the cam follower 62, that is, after the moving table 42 has moved to the leftmost position in FIG.
When the cam 57 further rotates by a predetermined amount, the timing switch 71 is turned on.

Furthermore, in FIG. 2, the shutter 24 is operated via a shutter drive circuit 81 when a release switch 80 is turned on. The release signal generated by turning on the release switch 80 is input from the timer 82 to the respective control circuits 84 and 85 that control the drive of the motors 26 and 28 after a slight time delay corresponding to the completion of the operation of the shutter 24. be done. The motors 26 and 28 are configured to be driven via respective motor drive circuits 86 and 87. As mentioned above, the motor 28 rotates the control cam 56 and the cam 57, and the cam 57 also rotates the timing switch 70,
71 is turned on at a predetermined timing. Pulses obtained by turning on the timing switches 70 and 71 are input to control circuits 84 and 85, respectively.

The control circuit 84 drives the motor 28 by receiving a shutter release signal, and stops the motor 28 by receiving a pulse signal from the timing switch 71. Also, the control circuit 8
5 drives the motor 26 in response to a pulse signal from the timing switch 70, and drives the motor 26 in response to a pulse signal from the timing switch 71.
It is now possible to stop the

[Effect of the embodiment]

The effects of the above configuration are further explained in Figures 5 to 7.
This will be explained with reference to the figures.

When the release switch 80 is turned on, the shutter 24 is operated via the shutter drive circuit 81, and the first photosensitive sheet 1 in contact with the exposure aperture 11 is exposed. The relay signal is input to the control circuits 84 and 85 after being delayed by at least the shutter time of the shutter 24 by the timer 82 . Thereby, the control circuit 84 rotates the motor 28 via the motor drive circuit 86. When the motor 28 rotates, the shaft 55 rotates and the control cam 5
6. As the cam 57 rotates, the cam follower 53
The rotary lever 50 is rotated counterclockwise around the shaft 49 via. Therefore, the driven roller 51 supported by the rotating lever 50 moves from the chain line position shown in FIG. 5A (indicated by "middle" in FIG. 7) to the solid line position (indicated by "bottom" in FIG. 7). ), and the tab 6 protruding from the opening 17 (see FIG. 2) of the camera bag 16 is held between the roller 47 and the driven roller 51.

At the same time, as the movable table 42 moves to the right due to the rotation of the cam 57, the tab 6 is pulled out as shown in FIG. 5B. During this time, the roller 51 is pressed against the roller 47, and the roller 47 is pressed against the roller 47.
Since the tab 7 is prevented from being reversed by the one-way clutch as described above, the tab 6 can be pulled out reliably. When the movement of the moving table 42 reaches the right end, the timing switch 70 is turned on by the pin 72 on the cam 57, and the motor 26 rotates (see FIG. 7). As the motor 26 rotates, the roller 47 rotates, so the driven roller 51 also rotates.
rotates to further pull out the tab 6 held there, and as shown in FIG. 5C, the tab 6 is peeled off and sent to the tab collection case 90. When the tab 6 has been pulled out to a certain extent, the unit pull-out end 5 is pulled out from the camera bag 16, and then the tab 6' of the next film unit is pulled out. During this period, the control cam 56 and the cam 57 continue to rotate, but due to the shape of their respective cam surfaces, the driven roller 51 is pressed against the roller 47 between A, B, and C in FIG. Between B and C in FIG. 5, the movable table 42 is kept at the right end position.

At the point when the tab 6 is peeled off, the cam 57
Due to the shape of the cam surface, the movable table 42 moves to the left. At the same time, the rotating lever 50 rotates clockwise due to the cam surface shape of the control cam 56, and the driven roller 51 returns to the position away from the roller 47, that is, the "middle" position shown in FIG. It will be in state D.

As the motor 28 further rotates, the cam 57
As a result, the rotating lever 50 is rotated clockwise, and the moving roller 51 is brought into a position where it comes into pressure contact with the center roller 44 attached to the shaft 43, that is, the "up" position shown in FIG. Since the center roller 44 continues to rotate, the driven roller 51
At the same time as they are pressed together, the unit pull-out end 5 is held between them and pulled out, as shown in FIGS. 6A and 6B.

In this way, the pull-out operation of the unit pull-out end 5 is started, but when the unit pull-out end 5 is pulled out to a certain extent and passes the tapered portion shown in FIG. The lever 50 rotates slightly counterclockwise, and the moving roller 51 is separated from the center roller 44, and the position shown in FIG.
is returned to the position indicated by the dashed line, that is, the "middle" position in FIG. However, at this point, the wide portions of the pull-out sheet 3 and transport sheet 4 of the film unit
It is entering between. And free roller 6
6 is pressed to the side roller 45 by the spring 68, so the side roller 4 is pressed by the motor 26.
When No. 5 is rotated, it follows and rotates, and the No. 6
As shown in FIG. D, the overlapping pull-out sheet 3 and transport sheet 4, as well as the photosensitive sheet 1 and image-receiving sheet 2, are pulled out and sent to the sheet receiver 95. By letting the driven roller 51 escape in this way, it is possible to prevent uneven pressure from being applied within the photographing screen of the film unit during the developing and fixing processes. As shown in FIG. 7, the cam 57 has a cam surface shape so that the movable table 42 is maintained at the left end position during the above-mentioned period of pulling out the film unit.

When the film unit has been completely pulled out, the pin 72 mounted on the cam 57 turns on the timing switch 71 (see FIG. 4). The pulse signal obtained when the timing switch 71 is turned on is input to the control circuits 84 and 85, which sends a stop signal to the motor drive circuits 86 and 87 to stop the motors 26 and 28 and return to the initial state. Preparations for the next shooting are complete.

As is clear from the above description, the control cams 56 and 57 are each rotated once in one cycle from the start of pulling out the tab 6 to the end of pulling out the film unit. Then, the pulled out tab 6 is ejected passing under the rotating lever 50, and the film unit 10 is removed from the rotating lever 50.
Since the materials are collected by passing over them, if an auxiliary passage (not shown) is provided for each, they can be collected separately. Furthermore, when using such a film unit for the first time, it is necessary to pull out the light-shielding safety sheet provided on the top layer. Although this light-shielding safety sheet is normally longer than the length of the tab 6, it can be pulled out in the same manner as the above-mentioned pulling out of the tab. For this purpose,
For example, the release switch 80 may be operated twice to eject the light shielding safety sheet.

Note that the movable base 42 may be biased to the left by a spring, and the cam follower 62 may be brought into contact with the cam 57 from the left side. Also, instead of providing the pin 72 on the cam 57 that turns on the timing switches 70 and 71, another switching member may be provided on the shaft 55, or a micro switch that turns on when the moving table 42 moves to the right end side may be used to turn the motor on. The motor 2 is rotated by the clock output of the timer circuit started by this microswitch.
6 and 28 may be stopped from rotating.

〔Effect of the invention〕

As described above, according to the present invention, when configuring the tab pull-out means and the unit pull-out means, the first and second rollers are arranged at a predetermined interval, and one of these rollers is selectively connected to the first and second rollers. a third roller in pressure contact with each other, the rollers being supported on a common support means, the alternative displacement of the third roller and the movement of the support means being driven by a first motor; Since the two rollers are driven by the second motor, the drive of the first and second motors can be electrically controlled via the control means in response to an electrical signal obtained after the shutter release. The pulling out of the tab and the pulling out of the film unit are automatically performed at predetermined timing. Therefore, there is no need for a manual drawer operation as in the past. Moreover, these drawer means repeat a certain operation in a certain cycle every time the shutter is released, which eliminates the uneven development of developer that tends to occur when the drawer is operated manually in the past, and improves the image quality of photographic images. It is also effective in increasing

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the film unit. FIG. 2 is a schematic diagram showing an embodiment of the present invention. FIG. 3 is a perspective view showing one embodiment of the present invention. FIG. 4 is an explanatory diagram of a timing switch used in one embodiment of the present invention. FIGS. 5A, B, C, and D are explanatory diagrams of the tab drawing operation in one embodiment of the present invention, respectively. Figure 6A,
B, C, and D are explanatory diagrams of the film unit draw-out operation in one embodiment of the present invention, respectively. FIG. 7 is a chart showing the operation of one embodiment of the present invention. 1... Photosensitive sheet, 2... Image receiving sheet, 5...
Unit drawer end, 6...Tab, 10...Film unit, 13...Film pack, 16...
Camera bag, 20...Adapter, 24...Shutter, 25...Drawer device, 26...Motor, 2
8, motor, 40... pedestal, 42... moving table, 4
4... Center roller, 45... Side roller,
47...Roller, 50...Rotating lever, 51...
Driven roller, 53... cam follower, 56... control cam, 57... cam, 62... cam follower,
70...Timing switch, 71...Timing switch, 80...Release switch.

Claims (1)

[Scope of Claims] 1. A tab pull-out means for pulling out a tab protruding from the film pack; and a pull-out means for pulling out a photosensitive sheet and an image-receiving sheet housed in the film pack in a stacked manner. In a film unit drawer for use in an instant film unit photography apparatus, the film unit drawer includes a unit drawer means for drawing out a unit drawer end protruding outside the film pack, wherein the two drawer means are arranged at a predetermined interval. a rotatable first roller and a second roller;
a rotatable third roller disposed displaceably between these rollers so that it can alternatively be in contact with the first roller or the second roller, and the first to third rollers a first motor that displaces the third roller so as to bring it into pressure contact with either the first roller or the second roller and moves the supporting means; and the first and second rollers. and a second motor that rotates the first and second motors, and after the third roller is brought into pressure contact with the first roller and the tab is sandwiched between them, the supporting means is moved in the drawing direction. and rotate the first roller to pull out the tab. After pulling out the tab, the supporting means is returned to its original position, the third roller is pressed against the second roller, and the unit drawer end is placed between them. be held between
A film unit drawer comprising: a control means for drawing out the film unit by driving a second roller.