JPS62240251A - Film transportation device - Google Patents

Abstract

PURPOSE:To rewind a film at a speed as higher as possible avoiding the occurrence of troubles, by providing a reel rotation pulse generating means for producing a pulse in association with the rotation of a winding reel. CONSTITUTION:A winding speed is switched to a constant low speed if a total of a microfilm F remaining on a winding reel 6 and in a film transportation passage to a pair of guide reels 7B is less than 200cm in the case that the microfilm F is rewound and a film transportation speed is higher than a prescribed speed. A remaining winding amount sensing means RR comprises a pulse rate produced from a film transportation pulse producing means PE1 and a pulse rate produced from a reel rotation pulse producing means PE2 for sensing an amount of the microfilm G remaining on the winding reel 6. A rewinding control means RC makes a winding speed of the microfilm F slower as a less amount of the film to be rewound remains.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a film transport device for roll film. More specifically, the present invention relates to a film conveying device that conveys a film wound on a supply reel in a direction in which the film is wound from the supply reel onto a take-up reel and in a direction in which it is rewound from the take-up reel onto the supply reel.

[Conventional technology]

The above-mentioned film transport device targets roll-shaped microfilm, which is an example of roll film, and includes a microfilm league that projects microimages on this microfilm onto a screen, and a microfilm league that projects microimages on the microfilm onto a screen, as well as a recording paper and a microfilm league. It is used to search for a desired microimage on a microfilm in a microfilm reader/printer that selectively performs copying.

By the way, although there are various roll-shaped microfilms used in micro devices such as microfilm leagues, most of them are currently stored in cartridges.

The standard of the cartridge is 3M as shown in Figure 6.
(Minnesota Mining & Manuf
M type cartridge (13A
) and ANSI (America) shown in Figure 7.
an National 5 standards In5
Ti-tute, Inc.) type cartridge (
13B).

Among them, the microfilm (F) housed in the M type cartridge (13A) has a wide leader tape (T) at its tip.

For example, if the width of the microfilm (P) is [16 mm], use the leader tape (↑) with a width of [20.5 mm].
is used. This leader tape (T) is thicker and stronger than the microfilm (F), and is attached to make it easier to pull out the microfilm (F) from the M type cartridge (13A). be. This leader tape (T) is placed on the supply reel (58) inside the M type cartridge (138).
It is configured to wrap around the outer periphery of the flange (5Aa).

When using a microfilm stored in this M type cartridge, there are the following problems. That is, when the microfilm is rewound into the cartridge, the leading end of the leader tape is still wound on the take-up reel.
On the other hand, since an unwinding force is acting on the microfilm, as the leader tape comes into contact with the outer peripheral edge of the flange of the supply reel as it is unwinding, a tensile force is applied to the microfilm.

Therefore, if the microfilm is rewound at high speed, the splicing tape may peel off and the microfilm and leader tape may be separated, the microfilm may break, or the leader tape may become stuck between the flanges of the supply reel. There are widespread problems where the microfilm is rewound and becomes unable to be transported thereafter.

Additionally, a protrusion is attached to the tip of the leader tape that locks into the film drawer opening of the cartridge when the microfilm and leader tape are housed in the cartridge, making it easier to pull out the microfilm from the cartridge. In this case, if the protrusion collides with the film outlet at high speed as the microfilm is rewound, problems such as breakage of the microfilm and damage to the cartridge may occur.

Therefore, in order to prevent such troubles from occurring, when rewinding the microfilm, a detector installed between the supply reel and the take-up reel detects blip marks that are imprinted on the microfilm along with the microimage. It has been proposed to detect that the leader tape has reached the cartridge when the leader tape is no longer detected, and to reduce the winding speed of the microfilm (for example, Japanese Utility Model Application No. 59-71318 reference).

[Problem that the invention seeks to solve]

However, the conventional configuration described above has the following problems.

In other words, even if a control signal for reducing the film transport speed is output, the film transport speed does not decrease immediately due to inertia, and the film continues to be transported during that time.

Although the length of the leader tape is standardized to some extent, the length from the tip of the microfilm to the portion where the first frame microimage is imprinted varies from microfilm to microfilm.

Therefore, in the case of the conventional configuration in which the arrival of the leader tape in the cartridge is detected when the blip mark is no longer detected by a detector installed in the conveyance path between the supply reel and the take-up reel, Depending on the type, the film transport speed may not be sufficiently reduced to the desired speed by the time the leader tape reaches the cartridge. Therefore, the rewinding speed of parts other than the leading end of the film cannot be made faster than a predetermined speed, making it difficult to increase the rewinding speed of the film.

On the other hand, in the microfilm league, for example, in order to accurately project a microimage onto a screen, a pair of guide members for regulating the position of the microfilm in the width direction are provided near the projection position. When using microfilm stored in a 3M type cartridge with a wide leader tape, in order to allow the leader tape to pass through smoothly, the pair of guide members should be placed in contact with the passing leader tape. The guide member is configured to be able to change its position elastically, and the distance between the pair of guide members is made variable.

In a configuration in which such a pair of guide members is provided, when the leader tape is detected by a detector provided on the conveyance path between the supply reel and the take-up reel, as in the conventional configuration described above. In this case, when rewinding the microfilm, the leader tape passes through the pair of guide members with almost no reduction in the transport speed, and there is a risk that the microfilm and the leader tape may be separated.

In view of the above-mentioned circumstances, an object of the present invention is to rewind the film as fast as possible while avoiding troubles such as separation of the leader tape and breakage of the film when using a film having a wide leader tape. The purpose is to do so.

° [Means for Solving the Problems] The film transport device according to the present invention has a characteristic configuration that includes a film transport pulse generating means that outputs pulses in conjunction with the transport of the film, and A reel rotation pulse generation means for outputting pulses is attached, and the S return of the film and the time winding are determined based on the pulse rate of the pulse output from the film transport pulse generation means and the pulse rate of the pulse output from the reel rotation pulse generation means. A rewinding remaining amount detection means for detecting the amount of film remaining on the take-up reel, and a lower film rewinding speed as the amount of film remaining to be rewound is smaller based on the detection result by this rewinding remaining amount detection means. This is because a rewinding speed control means is provided to control the rewinding speed.

[For production]

In other words, for example, if a roller is provided that contacts the film surface and is driven in conjunction with the transport of the film, and a film transport pulse generating means consisting of an optical or contact type rotary encoder is attached to this roller, the film transport pulse can be generated. The pulse rate of the pulses output from the generating means increases in proportion to the film transport speed. On the other hand, if, for example, a reel rotation pulse generation means consisting of a similar rotary encoder is attached to the take-up reel, the pulse rate of the pulses output from this reel rotation pulse generation means will increase in proportion to the 1llt feeding speed of the film. It also increases as the amount of film wound on the take-up reel decreases.

Therefore, the ratio of these two pulse slates changes depending on the amount of film wound on the take-up reel, with the effects of film transport speed cancelled. In other words, the diameter of the hub of the take-up reel, the diameter of the rollers constituting the film transport pulse generation means, or the constituent elements if the two rotary encoders that are the two pulse generation means mentioned above are optical types, for example. If the slit pitch of the slit plate is known, the amount of film remaining on the take-up reel when the film is rewound can be determined from the ratio of the pulse rates of the pulses from the two pulse generating means.

For example, if a film having a leader tape is used, the remaining amount of film to be rewound can be detected while the leader tape is still wound on the take-up reel.

Therefore, by controlling the film rewinding speed to be lower as the remaining amount is smaller, based on the amount of film remaining to be rewound detected in this way, any part of the leading edge of the film can be moved. The film rewinding speed can be reduced to a desired speed by the time the film reaches an arbitrary position on the film transport path.

For example, for microfilm stored in a 3M type cartridge, the first
The transport speed of the microfilm when the joint between the microfilm and the leader tape reaches the projection position, regardless of the length to the position where the microimage of the frame is imprinted, and regardless of the presence or absence of blip marks. can be set to the desired speed.

Moreover, the film rewinding speed is not controlled by detecting special marks or leader tapes.
This is done by detecting the remaining amount of film to be rewound, and the timing to change the rewinding speed can be set arbitrarily, so this timing can be set appropriately to match the rate of decrease in the film's rewinding speed. By setting this, it becomes possible to rewind parts other than the leading edge of the film at an extremely high speed.

〔Example〕

The present invention will be described in detail below based on the drawings.

As shown in FIG. 2, a microfilm reader printer is constructed by combining a reader printer main body (1) with a film carrier (2), which is an example of a film transport device according to the present invention, and a controller (3).

In this microfilm reader printer, a microfilm (P
) can be switched between a printer mode in which the macro image (I) on the screen is enlarged and projected onto the screen (4), and a print mode in which it is enlarged and copied onto recording paper using an electrophotographic process.

Inside the film carrier (2), as shown in FIGS. 3 and 4, there is a supply reel (SR) holding a roll-shaped microfilm (F), and a microfilm pulled out from this supply reel (SR). A take-up reel (6) for winding up the film (F) is provided on the moving table (2A).

And both reels (SR).

The microfilm (F) stretched across (6) is
A pair of glass plates (8a) that are guided by a plurality of guide rollers (78) to (7C) and form a light irradiation part (P).
.

(8b).

Separate drive shafts (9) and (10) are interlocked with the above-mentioned two reels (SR) and (6), and these two drive shafts (9).

(10) are respectively interlocked with a film rewinding motor (14) and a film winding motor (15) via transmission mechanisms (11) and (12). Of both motors (14) and (15), by driving the film winding motor (15), the microfilm (F
) from the supply reel (SR) to the take-up reel (6), and by driving the film rewind motor (14), the microfilm (F) is wound onto the take-up reel (6).
) in the direction of rewinding to the supply reel (SR).

Of the two reels (SR) and (6) mentioned above, the take-up reel (6) is pivotally supported by the film carrier (2), but the supply reel (SR) is housed in the cartridge (C). , this cartridge (C) is configured to be detachable from the film carrier (2).

There are currently two types of cartridges (C). One is 3M's M type shown in Figure 6.
It is a cartridge (13A).

The other is the ANS I type cartridge (13B) shown in FIG.

A leader tape (T), which is thicker and stronger than the microfilm (F), is connected to the tip of the microfilm (F) of the M type cartridge (13A). This leader tape (T) has a width larger than that of the microfilm (F), and is attached to the pair of flanges (5^a) of the supply reel (5A) in the M type cartridge (138). ) is wrapped around the outer circumference of the

The film carrier (2) is configured so that either of these types of cartridges (13A) and (13B) can be attached. Also, the film carrier (2) has either type of cartridge (C).
In order to determine whether a cartridge (C) is installed, a cartridge detection switch (16) is provided, which consists of a pair of microswitches whose opening/closing combination changes depending on the type of cartridge (C) installed. In addition, Figures 3 and 4
For convenience, the figure shows a state in which an M type cartridge (13A) is installed.

Although not shown, on the supply reel (SR) side of the drive shaft (9) with respect to the supply reel (SR), there is a
Supply stored in cartridge (13A) ・Reel (
5A) transmission retaining hole (5Ab) and ANS I type.
Supply reel (5B) housed in cartridge (13B)
) are provided with two engaging portions that can be individually locked to the transmission locking holes (5Bb). These two engaging parts are configured to be movable in the axial direction of the drive shaft (9), and are used to detect when any type of cartridge (C) is attached to the film carrier (2). When the cartridge detection switch (16) detects the cartridge (C), an engaging portion appropriate for the type of cartridge (C) automatically engages with the supply reel (SR).

The drive shaft (9) includes a base shaft (98) that is interlocked and connected to the transmission mechanism (11), a cylindrical shaft (9B) that is fitted onto the base shaft (9A) and can rotate integrally, and this cylindrical shaft (9B). It consists of a locking shaft (9C) that can be fitted inside and rotated integrally with the locking shaft (9C).
The two engaging portions described above are provided at the tip of C).

There are two elongated holes (9b) in the axial direction on the circumferential surface of the cylinder shaft (9B).
), (9c) are formed, and this long hole (9b)
, (9c), the pin (9a) implanted in the base shaft (9A)
) and the pin (9d) implanted in the locking shaft (9C) are fitted individually. The cylindrical shaft (9B) is supported at its intermediate portion by a ring (17) so as to be rotatable only around the axis. This ring (17) is attached to an E-shaped support frame (18) that is swingable around an attachment shaft (18A).

A rondo (19a) that is linked to a solenoid (19) is locked to the swinging end of the support frame (18), and the support frame (18) is turned on and off by turning on and off the solenoid (19).
) is configured to be able to move the sleeve sleeve (9B) in the axial direction with respect to the base shaft (9^). Cylindrical shaft (9B
) is located on the supply reel (SR) side with respect to the base shaft (9^), the two aforementioned engaging portions are located on the cylinder shaft (9^), respectively.
98) is pressed against the supply reel (SR) by the biasing force of the spring (20) that comes into contact with the edge of the spring (20). Of the two retaining parts, the retaining part corresponding to the type of supply reel (SR) engages with the supply reel (SR), and transmits the rotation of the drive shaft (9) to the supply reel (SR). It is configured as follows.

The cartridge (C) is inserted into the film carrier (from the left in the figure).
2), and as described above, when the drive shaft (9) engages the supply reel (SR), the microfilm (F)
In order to remove the slack, the supply reel (SR) is momentarily rotated in the direction B in the diagram.

Thereafter, a film feeding mechanism suitable for the type of cartridge (C) detected by the cartridge detection switch (16) is activated to pull out the leading edge of the microfilm (F) from the cartridge (C).

A film feeding mechanism suitable for the M type cartridge (13A) consists of a feeding roller (21) and the like that are interlocked with a film feeding motor (not shown). As shown in FIGS. 3 and 6, this delivery roller (21) is held by a swinging lever (21a), and swings against the notch (13Aa) of the M type cartridge (13A). It is configured so that you can enter and leave the building by doing so.

With the M type cartridge (13A) mounted on the film carrier (2), the delivery roller (21)
It enters the notch (13Aa) and comes into contact with the leader tape (T) wound around the outer peripheral edge of the flange (5Aa) of the supply reel (5A). At this time, the interlock between the supply reel (5A) and the drive shaft (9) is cut off.

Then, by driving the film delivery motor and rotating the delivery roller (21), the supply reel (5A
) rotates in direction A in the figure. With this rotation, the tip of the strong leader tape (T) is configured to be sent out from the film delivery port (13Ab) of the M type cartridge (13A).

A film feeding mechanism suitable for the ANSI type cartridge (13B) consists of a feeding bell l-(22) interlocked with the above-mentioned film feeding motor, a peeling belt (23), and the like. As shown in FIGS. 3 and 7, the delivery belt (22) is equipped with an ANS 1 type cartridge (
13B), and the peeling belt (23) is attached to the film outlet (13Bb).
They are constructed so that they can swing in and out.

With the ANS I type cartridge (13B) installed in the film carrier (2),
2) is attached to the notch (13Ba) and the peeling belt (23
) respectively enter the film delivery port (13Bb) and come into contact with the outer peripheral surface of the microfilm (F). At this time, as before, the interlock between the supply reel (5B) and the drive shaft (9) is cut off.

Then, the film feed motor is driven to feed the film (feed bell).
By rotating the peeling belt (22) and the peeling belt (23), the supply reel (5B) rotates in six directions in the figure, and the tip of the microfilm (F) is rotated by the rotation of the peeling bell l-(23). It is peeled off and the film exit port (13B
b) is configured to be sent out to the outside.

In addition, when the M type cartridge (13A) is installed, the delivery bell (22) and peeling belt (23)
) is not swung and is in a non-active position, and AN
When the SI type cartridge (13B) is installed, the delivery roller (21) is configured not to swing but to be in a non-operating position.

M type cartridge (13A) film outlet (
The leader tape (T) fed out from 13Aa) or the leading end portion of the microfilm (F) fed out from the film feeding port (13Bb) of the ANS I type cartridge (13B) is then transferred to the film feeding motor. As the driving continues, the light is guided to the three guide parts (24A) to (24C) and the two pairs of guide rollers (7A) and (7B), and the glass of the light irradiation part (P) is guided. Passing between the plates (8a) and (8b),
A guide roller (7C) and two guide parts (24D).

(24E), reaches the winding roller (6), and is wound around the hub thereof.

With the above steps, loading of the microfilm (F) is completed. Note that (25) in the figure is a presser lever, which is biased by a spring (25a) during loading and comes into contact with the film surface to prevent the microfilm (F) being wound onto the take-up reel (6) from loosening. It looks like this.

Note that during this loading, the lower glass plate (8b) of the light irradiation part (P) is moved over the upper glass plate (8b) so as not to damage the microfilm (F) and leader tape (T).
8a).

On the other hand, the guide roller pair (7A) is ANS I type.
When the cartridge (13B) is attached, the thin microfilm (P) is held tightly and conveyed.
In addition, when the M type cartridge (13A) is installed, the thick leader tape (T) is roughly guided at a distance from the cartridge to reduce fatigue of the leader tape (T).

Once loading of microfilm (F) is completed,
When the M type cartridge (13A) is installed, the rotation of the delivery roller (17) is stopped and the notch (13Aa) is retired. Also, ANSI type
When the cartridge (13B) is attached, the delivery belt (22) and the peeling belt (23) are stopped from rotating and separated from the outer peripheral surface of the microfilm (F). And a pair of glass plates (8a) of the light irradiation part (P),
(8b) are brought into close contact. Hereafter, microfilm (F)
The transport is performed by the film rewinding motor (14) and the film winding motor (15) described earlier.

The light irradiation part (P) through which the microfilm (F) passes is
With the film carrier (2) installed in the league printer body (1), remove the condenser lens (2) from the light source (S).
6a), (26b), (26c), a reflecting mirror (26d), and the like, and the center thereof coincides with the center (L) of the light beam arriving through the optical system (26). The light beam from the light source (S) passes through the micro image (1) at the light irradiation part (P), and the image of this micro image (1) is transmitted through the projection lens (PL).
A projection device (IF
), and in reader mode the screen (4)
The image is projected in an enlarged manner, and in print mode, it is enlarged and copied onto recording paper.

As shown in FIG. 5, the guide parts (24C) and (24D) located on both sides of the light irradiation part (P) have a pair of left and right elastic guide pieces (24a) and (24b), respectively. There is. This pair of left and right elastic guide pieces (24a),
(24b) is provided so that the interval between the ends becomes narrower on the take-up reel (6) side. The take-up reel (6) side is urged inward by its own elasticity, and normally these elastic guide pieces (24a).

(24b) is in contact with both high edges of the lower guide plate (24c).

In this state, the pair of elastic guide pieces (24a).

(24b) The distance between them is [16 mm], which is the width of the microfilm (F). When an M type cartridge (13A) is attached and a microfilm (F) with a leader tape (T) is used, the pair of elastic guide pieces (24a), (24b) is a microfilm (F
) is expanded in the width direction, and the interval becomes E20.5 mm, which is the width of the leader tape (T).

Therefore, the leader tape (T) passes smoothly. After the leader tape (T) has passed, the pair of elastic guide pieces (24a) and (24b) move inward due to their own elasticity, and the distance therebetween becomes 16 mm, which is the width of the microfilm (F) again.

In other words, by guiding the microfilm (F) to position it in the width direction on both sides of the light irradiation part (P), the microimage (I) on the microfilm (F) can be moved to the screen (4) in the reader mode. This allows the micro-image (1) to be projected at a precise position on the recording paper during print mode, while also allowing the micro-image (1) to be copied at a precise position on the recording paper, even when a wide leader tape (T) is used. , and is constructed so as not to cause any hindrance to its transportation.

Further, as shown in Fig. 3, a micro film ( F) Two long holes (2a
), (2b) are formed, and this elongated hole (2a)
, (2b), the two guide pins (2c) and (2d) implanted in the base (2B) are fitted in such a way that they cannot be removed. That is, within the film carrier (2), the moving stage (2A) and the base (2B) are
) is attached to allow relative movement in the width direction.

Further, the rack (27) fixed to the base (2B) is positioned so as to be exposed through another elongated hole (2e) formed in the movable table (28). And this rank (27
) and the pinion gear (28) that engages with the moving table (2A).
It is interlocked and connected to a motor (29) fixed above.

By rotating the motor (29) in the forward and reverse directions, the moving table (2A) can be moved in the width direction of the microfilm (F) with respect to the base (2B) within the film carrier (2). In other words, when using a duo-type microfilm (F) with two microimages imprinted in the width direction of the microfilm (F), by driving this motor (29), you can easily switch channels. It is configured so that it can be done.

Further, the base (2B) of the film carrier (2) is fixed to the table (30) on the side of the reader printer main body (1) in a slidable and externally fitted state.

By releasing this fixation, the film carrier (2) can be removed together with the base (2B), and the film carrier (C) to which the cartridge (C) holding the roll-shaped microfilm (F) is attached is installed. (2
), it is possible to set a fish carrier (not shown) that holds the microfiche.

In addition, as shown in FIGS. 3 and 5, the light irradiation part (P)
The upper glass plate (8a) has a microfilm (F
) is attached with a blip detector (3I) that detects a frame search mark, so-called blip (M), imprinted on the micro image (1). Specifically, this blip detector (31) is a light receiving element provided on the opposite side of the microfilm (F) from the light source (S), and constitutes a photointerrupter together with the light source (S). be.

In other words, the light receiving element (31), which is a blip detector, detects the light from the light source (S) when the film carrier (2) is installed in the league printer main body (1).
The blip (M) is detected based on the change in the received light intensity due to being blocked by the blip (M) which is darker than the base portion of the light. As the microfilm (F) is fed, a counter (not shown) is counted up each time this blip detector (31) detects a blip (M), and the microimage (I) at that position is counted up. )
You can now see the frame number.

On the other hand, as shown in FIG. 3, the upper roller (7Ba) of the guide roller pair (7B) located before the supply reel (SR) of the light irradiation unit (P) is inverted has a circular shape having a plurality of slits. The plates (32) are interlocked. Also, disc (32)
A photo ink converter (33) having a light emitting section and a light receiving section sandwiching the slit portion is provided. The disk (32) and the photo ink actuator (33) are used to form a film transport pulse encoder (PH1) which is a film 1 general transport pulse output means that outputs a pulse signal in conjunction with the transport of the microfilm (F). ).

The guide roller pair (7B) maintains a close contact state both during and after loading the microfilm (F), and the pair of guide rollers (7B) maintains a close contact state even when loading the microfilm (F).
) is always followed by the passage of the

Therefore, this film transport pulse encoder (PEI)
The output of the pulse signal starts when the leading edge of the leader tape (T) or microfilm (F) passes during loading. Completion of loading of the microfilm (P) is determined when the count result of this pulse signal reaches a predetermined number.

Further, the drive shaft (10) for the take-up reel (6) also has a
A disc (34) having a plurality of slits is interlocked with each other, and a photo ink clubter (35) having a light emitting part and a light receiving part sandwiching the slit portion of the disc (34) is provided. The disc (34) and the photo incluctor (35) operate a reel rotation pulse encoder (PE2) which is a reel rotation pulse output means that outputs a pulse signal corresponding to the rotation of the take-up reel (6). It consists of

Then, the above-mentioned film transport pulse encoder (PE
I) and the aforementioned two motors (14) based on the output signals obtained from the aforementioned blip detector (31).
) and (15), the microfilm (F) is conveyed and the desired microimage (
I) is configured so that it can be searched out and projected onto the screen (4). If the print mode is selected in this state, the micro image (I) can be enlarged and copied onto recording paper.

One way to search for a target micro-image (I) is to input the frame number attached to that micro-image (1) from the controller (3), and search for the blip (M) attached to each micro-image (1). ) is sequentially counted each time the blip detector (31) detects it, and the microfilm (F) is conveyed until the count value matches the input frame number.

By the way, as the blips (M) imprinted on the microfilm (F), there are cases where a plurality of types of blips having different lengths in the longitudinal direction of the microfilm (F) are used. For example, the shortest blip (M) is attached to each microimage (1) of each member of the document, the longer blip (M) is attached to each document, and the longest blip ( By attaching M) to each item-divided series of documents, it may be possible to easily perform a search input for microimage (1).

In this case, the presence or absence of a blip (M) is detected by a blip detector (31), and this blip detector (31)
By counting the number of output pulses of the film transport pulse encoder (PEI) from the time when a blip (?I) is detected by and determining the length of the blip (M), the desired micro-image (1) can be searched. It is.

Alternatively, by operating the film advance knob (36) provided on the reader printer main body (1) shown in FIG.
While transporting the microfilm (F) at a low speed, visually confirm the microimage (r) projected onto the screen (4), and when the desired image (1) is projected onto the screen (4), the microfilm (F) ) can also be done by stopping the conveyance of the

The film advance knob (36) is linked to a cam (37) and a potentiometer (38), as shown in FIGS. 8 and 9. A recess is formed in the front surface of the cam (37), and a click ball (39) that engages with this recess at the midpoint of the film advance knob (36) is inserted into the support frame (40).
It is biased toward the cam (37) by a plate spring (41) attached to the cam (37).

That is, the film advance knob (36) is click-stopped at the midpoint position.

The potentiometer (38) is fixed to the support frame (40) and outputs a voltage according to the amount of operation from the midpoint position of the fill J and feed knob (36). Furthermore, a microsinch (42) that comes into contact with the side surface of the cam (37) is provided on the side of the cam (37).

On the side of this cam (37) is a film advance knob (36).
is formed so that the state of the abutting microswitch (42) changes depending on whether it is operated in the left or right direction from the midpoint position.

That is, this microswitch (42) serves as an operating direction detection switch for the film advance knob (36).

Then, the operating direction of the film advance knob (36) from the midpoint position is detected by the microswitch (42),
Select and drive either the film rewinding motor (14) or the film winding motor (15), and use the output from the potentiometer (38) to control the transport speed of the microfilm (F). Feed knob (36
) is configured to be changed according to the amount of operation. Next, the film transport control circuit will be explained.

As shown in FIG. 1, the microswitch (42) is connected to a flip-flop (FFI) that is set or reset depending on its state.

The output of this flip-flop (FFI) is the relay (R
It is input to the base of the transistor (Tri) connected to Y). A changeover switch (43) that connects either the film rewinding motor (14) or the film winding motor (15) to the power source (Vcc) is linked to the relay (RY).

On the other hand, the output from the potentiometer (38) is amplified by two operational amplifiers (44) and (45), and is amplified by a transistor (T) connected to a changeover switch (43).
r2). Film advance knob (
36) is at the midpoint position, the potentiometer (
38) is in the state shown by the dotted line in the figure, and its output is [0■
] and which motor (14).

(15) is also not driven.

When the film advance knob (36) is rotated in the six directions in FIGS. 2 and 9, the microswitch (42) is in the state shown in FIG. 1, and the flip-flop (FFI) is set. and its output becomes "H" level. As a result, the relay (RY) becomes "ON", the film winding motor (15) is connected to the power supply (Vcc), and the microfilm (P) is transferred to the supply reel (SR).
) and is transported in the direction where it is wound onto the take-up reel (6). At this time, the potentiometer (38) is, for example,
It is located at the position indicated by the solid line in the figure.

Further, when the film advance knob (36) is rotated in the direction B in FIGS. 2 and 9, the microswitch (42) is in a position opposite to that shown in FIG. The flip-flop (FFI) is reset and its output becomes "L" level. At this time, the relay (RY) is in the "OFF" state and the film rewind motor (14)
is connected to the power supply (Vcc), and the microfilm (F)
is conveyed in the direction from the take-up reel (6) to the supply reel (SR) where it is rewound. At this time, the potentiometer (
38) is located, for example, at the position indicated by the chain double-dashed line in the figure.

Furthermore, the potentiometer (38) has a fixed resistor (4
6) are connected in parallel. And between the potentiometer (38) and the connection point (a) and the fixed resistance (
46) and the connection point (a), separate analog switches (47a) and (47b) are interposed. Analog switch (47a) on the potentiometer (38) side
) is inputted with the inverted output of the AND circuit (ANI), and the analog switch (
47b), the output of the AND circuit (ANI) is input as is.

That is, when the output of the AND circuit (ANI) is at the "yes" level, the potentiometer (38) is connected to the operational amplifier (44).
), and the microfilm (F) is configured to be transported at a speed corresponding to the amount of rotational operation of the film transport knob (36). On the other hand, when the output of the AND circuit (ANI) is at the "H" level, the fixed resistor (46) is connected to the operational amplifier (44), and the microfilm (F) is rotated at a constant speed determined by the resistance value of the fixed resistor (46). It is configured to be transported.

The resistance value of this fixed resistor (46) is the same as the resistance value of the wide leader tape (T) when the microfilm (P) stored in the M type cartridge (13A) is used.
However, the guide parts (24C) on both sides of the light irradiation part (P),
(240) and when wound around the outer periphery of the supply reel (5A) in the M type cartridge (13A), the leader tape (T) and microfilm (F) may be damaged. The rewinding speed is set so that no rewinding problems occur.

Normally, the output of the AND circuit (ANI) is at the "L" level, and the microfilm (F) is transported based on the operation of the potentiometer (38). Then, when the cartridge detection switch (16) detects that the M type cartridge (13A) is installed, the microfilm (F) remaining on the take-up reel (6) is rewinded. ) is below a predetermined amount, the output of the AND circuit (ANI) changes to "H" level, and the microfilm (F) is transported at a constant speed.

The timing of switching the output from this AND circuit (ANI) is determined when rewinding the microfilm (F) stored in the M type cartridge (13A) from the take-up reel (6) to the supply reel (SR). , the fixed resistance (
46) so that the speed can be sufficiently reduced to a constant speed determined by the resistance value of 46).

The AND circuit (ANI) has a potentiometer (38)
Combare multiplier (48) into which the output voltage signal from
, a signal obtained by inverting the output signal of the flip-flop (FFI), and a signal obtained by inverting the output signal of the D-flip-flop (FF2
) are respectively input.

Next, a portion of the film transport control circuit that detects the foot of the microfilm (F) remaining on the take-up reel (6) in order to determine the timing of switching the output from the AND circuit (ANI) will be explained.

In the figure, (1'El) and (PH2) are the already explained film transport pulse encoder and reel rotation pulse encoder, which are composed of photo ink clubters (33) and (35), respectively, and two photo ink club converters (33). ,
The output from (35) is sent to each separate comparator (49)
, (50). Two comparators (49).

The pulse signal shaped into a rectangular wave output from (50) is sent to each separate 4-bit binary counter ([1C1)
, (BC2) clock input terminal (CL), 4-bit binary counter (BCI), (BG
2) counts the number of pulses.

The 4-bit binary counter (BCI) on the film transport pulse encoder (PEI) side outputs a carry when it counts 16 pulses.

This carry is input to the clock input terminal (CL) of the D flip-flop (FF2), and the D flip-flop (FF2) latches the level of the D input terminal (D) at that time and outputs it to the output terminal (Q ) output from this D
The most significant bit (Ql) of the 4-bit binary counter (BO2) on the reel rotation pulse encoder (PE2) side is connected to the D input terminal (D) of the flip-flop tube (FF2).
The output from is input.

The highest value of this 4-bit binary counter (BO2) (
Q3) is the count value [8□
, becomes the "H" level when the voltage is higher than or equal to .

Therefore, the output from the output terminal (b) of the D flip-flop (FF2) is the output from the film transport pulse encoder (PE
When 16 pulses are generated from I), if 8 or more pulses are output from the reel rotation pulse encoder (PE2), the signal goes to "H" level, and from the reel rotation pulse encoder (PH2). If the number of pulses has not reached 8, it becomes "L" level.

In other words, the winding rule (
When the pulse rate of the pulse signal outputted in conjunction with the rotation of 6) becomes 1/2 or more, the output terminal (b) of the D flip-flop (FF2) becomes the "I" level. Then, when the ratio of the pulse rates of these two pulse signals becomes E2:l], the guide reel pair (7
The slit pitch of the discs (32) and (34) and the roller (7Ba) were adjusted so that the amount of microfilm (F) remaining on the film transport path up to B) and the take-up reel (6) was 200 cm1. The diameter, the diameter of the hub of the take-up reel (6), etc. are set.

The pulse rate of the pulse signal output in conjunction with the rotation of the take-up reel (6) increases as the transport speed of the microfilm (l?) increases, and the microfilm wound on the take-up reel (6) increases. The smaller the amount of (F), the larger it becomes. On the other hand, the pulse rate of the pulse signal output in conjunction with the transport of the microfilm (F) increases as the transport speed of the microfilm (F) increases.

Therefore, the ratio of the pulse rates of these two pulse signals is the microfilm (
F) varies depending on the amount. And, as mentioned above,
The ratio of the pulse rates of the two pulse signals [2:1] is
This corresponds to the remaining amount of microfilm (F) [200c+n].

In other words, the microfilm (1?) remains on the film transport path up to the guide reel pair (7B) and on the take-up reel (6).
) becomes less than 200 cal, the hub of the take-up reel (6) and the microfilm (F
) is less than twice the diameter of the roller (7Ba). The slit pitches of the two discs (32) and (34) are set to be the same, so in this state, 2
The ratio of the pulse rates of the pulse signals from the two encoders (pH!1) and (PH2) is more than [2:1],
Thereby, the configuration is such that the output of the output terminal (Q) of the D flip-flop (FF2) becomes "H" level.

The carry from the 4-bit binary counter (BCI) on the film transport pulse encoder (PIEI) side is input to the one-shot multi-by-break (OSI).
The pulse output from this one-shot multi-by-break (OSI) is connected to the reel rotation pulse encoder (PH
2) is input to the clear input terminal (CLR) of the 4-bit/7-bit binary counter (BO2). This allows this 4-bit binary counter (II
The count by C2) is cleared and pulse counting is started again from 1.

Also, the output from the output terminal (Q) of the flip-flop (FFI) is inverted, and the film advance knob (36) is
9 and 9, when the rotation is being performed in the direction B in the figures, that is, when the microfilm (F) is being rotated on the supply reel (S
It goes to "H" level when being operated to rewind to the R) side. Furthermore, the output of the comparator (48) becomes 'H' level when the output voltage from the potentiometer (38) is above a predetermined value, that is, when the film advance knob (36) is rotated beyond a predetermined value.

When the above three conditions are met, an AND circuit (ANI)
The output changes to "H" level, and the analog switch (4
7a) becomes "OFF" and the analog switch (47b) becomes "ON". In other words, when the microfilm (F) is being rewound and the film transport speed is above a predetermined value, the take-up reel (6) and guide reel pair (7B
) When the total length of the microfilm (F) remaining on the film transport tl path becomes less than [200 cm], the rewinding speed of the microfilm (F) is switched to a constant low speed determined by the fixed resistor (46). It is configured as follows.゛When the microfilm (F) is being wound from the supply reel (SR) to the take-up reel (6), the signal from the output terminal (Q) of the flip-flop (FFI) is inverted and has an "L" level. , the output of the AND circuit (ANI) remains at the "L" level.

Furthermore, when the operation amount of the film advance knob (36) is below a predetermined value, that is, when the rewinding speed of the microfilm (F) is below a predetermined value, the output from the comparator (48) is "
The output of the AND circuit (ANI) is “L” level.
The level remains the same. Therefore, in either case, the transport speed of the microfilm (F) remains unchanged.

That is, in this embodiment, two 4-bit binary counters (BCI), (RC2), a D flip-flop (FF2), a one-shot multi-pipe rake (051), etc. are used to control the film transport pulse generation means (PEI). The microfilm (F) remaining on the take-up reel (6) when rewinding the microfilm (F) is calculated from the pulse rate of the pulses output from the reel rotation pulse generator (PIE2) and the pulse rate of the pulses output from the reel rotation pulse generating means (PIE2).
F) constitutes a rewind remaining amount detection means (RR) that detects the amount of rewinding. and,.

Two analog switches (47a), (47b),
A rewinding speed control means (RC) is configured by using an AND circuit (ANI) or the like to lower the rewinding speed of the microfilm (F) as the remaining amount of film is reduced.

Although the rewinding of the microfilm (F) from the take-up reel (6) to the supply reel (SR) is not shown in the block diagram of Fig. 1, it is controlled by the controller (3) mentioned earlier. The configuration is such that it can also be performed by input.

When a rewind signal is input from the controller (3), the changeover switch (43) is switched to the side that connects the film rewind mode and the rewind (14) to the power supply (Vcc), and the output from the potentiometer (38) is Automatically set to maximize output voltage.

As a result, rewinding of the microfilm (F) is started, and from then on, the microfilm (F) remaining on the take-up reel (6) is detected by the rewinding remaining amount detection means (RR) in the same way as in the manual operation described earlier. Based on the detection result of the remaining amount of F), 2
The configuration is such that the leading end of the microfilm (F) can be rewound at a low speed by switching the two analog switches (47a) and (47b).

Also, when the rewind signal is manually input from the controller (3), the microfilm (F) remaining on the take-up reel (6)
If the remaining amount is already below [200c+n],
Analog switch (47a) immediately.

(47b) is switched to set the rewinding speed to a constant low speed.

In addition, in the previous embodiment, an M type cartridge (13
The operation only when rewinding the microfilm (F) stored in A) has been explained. In this case, in order to prevent problems with film transport due to the wide leader tape (T), the microfilm (P) remaining on the take-up reel (6)
When the remaining amount is below the specified amount, remove the microfilm (F).
The rewind speed was switched to a constant low speed.

On the other hand, when rewinding the microfilm (F) stored in the ANS I type cartridge (13B),
Since the wide leader tape (T) is not connected,
There is no need to change the rewinding speed. Therefore, by the cartridge detection switch (16), the ANS I type
When it is detected that the cartridge (13B) is attached, the rewinding speed control described above is not performed, and the microfilm (F) is rewound all at high speed.

The specific configuration of the rewind remaining amount detection means (RR) can be changed as appropriate, for example, instead of the configuration based on the pulse output from the film transport pulse generation means (PEI) explained in the previous embodiment, , reel rotation pulse generating means (PE2
) may be configured based on the pulses output from the. Furthermore, the pulse rate ratio that determines the timing of switching the transport speed of the microfills I and (F) to a constant speed is not limited to [2:1] as described in the previous embodiment.

It is possible to set various ratios by changing the slit pitch, notch, etc. of the discs (32) and (34). Furthermore, it is possible to set various ratios depending on the conditions for controlling the rewinding speed of the microfilm (F).

Furthermore, the main part of the film transport control circuit is composed of a microcomputer, and the film transport pulse generating means (
PIEI) and the pulses output from the reel rotation pulse generating means (PE2) may be input to this microcomputer, and the rewinding remaining amount detecting means (RR) may be configured by software.

In addition, the rewinding speed of the microfilm (F) by the rewinding speed control means (RC) is changed to a constant low speed at a predetermined timing, as described in the previous embodiment.
Based on the detection result by the rewind remaining amount detection means (RR),
The rewinding speed of the microfilm (F) may be smoothly changed by sequentially changing the speed to a plurality of speeds in which the speed decreases as the remaining amount of the microfilm (F) decreases.

The film transport device according to the present invention is applicable not only to the micro film (F) described in the previous embodiment, but also to various movie films, still camera films, etc. (these are collectively referred to as film (F)). It can also be applied to things that target.

〔Effect of the invention〕

As described above, the film transport device according to the present invention detects the amount of film remaining on the take-up reel during film rewinding, and performs film rewinding based on the detected amount of film remaining on the take-up reel. The film rewind speed is lowered when there is less remaining film, so while it is possible to rewind the film at an extremely high speed except for the leading edge of the film, the leading edge of the film is connected to the take-up reel and the supply reel. The rewinding speed of the film when it reaches the guide member or cartridge provided on the film transport path between the
It can be made sufficiently low.

Therefore, when rewinding a film having a leader tape wider than the film width onto a supply reel, the tension generated in the film when this leader tape comes into contact with the guide member or the outer peripheral edge of a pair of flanges of the supply reel can be reduced. This reduces the risk of problems such as separation of the film and leader tape or breakage of the film.

As a result, it has become possible to rewind a roll of film with fewer troubles and to speed up the rewinding process.

[Brief explanation of drawings]

The drawings show an embodiment of the film conveying device according to the present invention,
Figure 1 is a block diagram of the film transport control circuit, Figure 2 is a front view of the microfilm reader printer, Figure 3 is a perspective view of the inside of the film carrier, Figure 4 is a schematic sectional view of the film carrier, and Figure 5. 6 is a perspective view of the M type cartridge, FIG. 7 is a perspective view of the ANSI type cartridge, FIG. 8 is a sectional view of the film advance knob, and FIG. 9 is a perspective view of the area around the light irradiation unit. I in Figure 8
It is a sectional view taken along the line X-IX. (6)...Take-up reel, (SR)...
Supply reel, (F)...Film, (PEI)
...Film transport pulse generating means, (RC2)
...Reel rotation pulse generating means, (RR)...
... Remaining rewinding amount detection means, (RC) ... Rewinding speed control means.

Claims (1)

[Claims] In a film transport device that transports a film wound on a supply reel in a direction in which the film is wound from the supply reel to a take-up reel and in a direction in which it is rewound from the take-up reel to the supply reel,
A film transport pulse generating means for outputting a pulse in conjunction with the transport of the film, and a reel rotation pulse generating means for outputting a pulse in conjunction with the rotation of the take-up reel are attached, and the film transport pulse generating means outputs a pulse in conjunction with the rotation of the take-up reel. rewinding remaining amount detection means for detecting the amount of film remaining on the take-up reel when rewinding the film from the pulse rate of the pulse output from the reel rotation pulse generation means and the pulse rate of the pulse output from the reel rotation pulse generation means; A film conveying device provided with a rewinding speed control means that lowers the rewinding speed of the film as the amount of film remaining for unwinding decreases based on the detection result by the remaining amount detecting means.