JPS63109426A - Film carrying device - Google Patents

Abstract

PURPOSE:To detect the thickness of a film to be carried by means of simple modification by comparing a detected speed ratio being detected with a reference speed ratio being obtained at the time of using a film having a reference thickness, and outputting the compared result as a film thickness signal. CONSTITUTION:An output signal from a pulse rate ratio detecting means PRD, i.e. a count value of a counter 42, and a reference count value extracted from a ROM 44 are inputted and compared to each other to/by a pulse rate ratio comparing means PRC. Said comparison practically indicates the comparison of the ratio of a film carrying pulse rate to a winding reel rotational pulse rate, i.e. the ratio of a microfilm carrying speed to a winding reel rotational speed with a reference speed ratio expressed by a reference pulse rate ratio. The decided result is outputted from a pulse rate ratio comparing means PRC to be an example of a speed ratio comparing means as a film thickness signal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in a device for projecting an image imprinted on a film such as a microfilm, and a roll-type film is connected to a supply reel and a take-up reel. It relates to a film transport device that transports a film in one or both forward and reverse directions.

[Conventional technology]

The above-mentioned film conveying device is equipped with a pulse generating means such as a low reencoder that outputs pulses according to the rotation of the supply reel or take-up reel, or the conveyance of the film, etc., and outputs from this pulse generating means. A device is known that is configured to be able to detect the transport amount and transport speed of the film using pulse signals generated by the film.

[Problem that the invention seeks to solve]

However, recently, the thickness of the film used in these film transport devices is no longer limited to one type.

In particular, with microfilm, so that as much information as possible can be stored on one film,
Films with a thickness of [2.5 ml (0.0635 mm)], which is half the thickness of the conventional [5 mi 1 (0.127 m)], are now often used.

Further, the conventional film with a thickness of [5ml] is still widely used because it is strong and can be transported stably.

In the conventional film conveyance device described above, since the conventional film was intended for a film with a thickness of [5 nails], when conveying a film with a thickness of [2.5 ml], a large tensile force is generated during conveyance. There is a risk that the film may be cut due to this action.

In particular, in order to reduce the impact that is applied to the film when winding the end of the film, as mentioned above, the amount of film transport is detected and the film transport speed is reduced to a low speed when the amount remaining to be wound becomes less than a predetermined amount. When performing speed control such as switching, if the amount of film transport is detected using a pulse signal from a pulse generating means attached to the supply reel or take-up reel, the timing of speed switching can be adjusted depending on the thickness of the film. will be different.

Therefore, it may take extra time to wind the film, or the transport speed of the film may not be sufficiently reduced when winding the end of the film, resulting in a situation where the shock applied to the film cannot be sufficiently reduced. was there.

In view of the above-mentioned circumstances, an object of the present invention is to enable the thickness of a film to be transported to be detected with a simple modification so that the film transport speed can always be controlled reliably regardless of the thickness of the film. It is in.

[Means for solving problems]

A characteristic configuration of the film transport device according to the present invention includes a film transport speed detection means for detecting the transport speed of the film, and a reel rotation speed detection means for detecting the rotation speed of the reel. speed ratio detection means for detecting the ratio of the film conveyance speed detected by the reel rotation speed detected by the reel rotation speed detection means; A speed ratio comparison means is provided for comparing the speed ratio with a reference speed ratio when used and outputting the comparison result as a film thickness signal.

[For production]

That is, for example, the film transport amount per revolution of a take-up reel, which is an example of a reel, increases faster as the film becomes thicker. Therefore, the ratio of the film transport speed to the rotational speed of the take-up reel changes depending on the thickness of the film. Therefore, using a film with a standard thickness, the ratio of the film transport speed to the rotation speed of the take-up reel is determined in advance.
If this is set as a reference speed ratio, by comparing the speed ratio when using a film of unknown thickness with this reference speed ratio, it can be determined whether the thickness of the film is thicker or thinner than the reference thickness.

If the film to be transported has two thicknesses,
Set one standard thickness and set the thickness of the film used as 3.
If there are more than one type, by setting two or more reference thicknesses,
A variety of different film thicknesses can be detected.

Moreover, as mentioned at the beginning, this type of film transport device generates pulses in response to film transport, rotation of the take-up reel, etc. in order to control the film transport speed according to the amount of film transport. Since a pulse generating means for detecting the thickness of the film is generally provided, the above-described configuration for detecting the thickness of the film can be realized by a simple modification.

〔Example〕

Hereinafter, the present invention will be described in detail based on the drawings.

The following examples are generally explained as follows.

A film transport pulse generating means for outputting a film transport pulse in conjunction with the transport of the film, and a reel rotation pulse generating means for outputting a reel rotation pulse in conjunction with the rotation of the reel. a pulse rate ratio detection means for detecting a pulse rate ratio of the film transport pulse; and a detection pulse rate ratio detected by the pulse rate ratio detection means and a reference pulse rate ratio when using a film of a reference thickness. A film conveying device provided with a pulse rate ratio comparing means for comparing the values and outputting the comparison result as a film thickness signal.

The details of this are as follows.

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 (F
) can be switched between a reader mode for enlarging and projecting the micro image (I) on the screen (4) and a print mode for enlarging and copying it onto recording paper using an electrophotographic process.

Inside the film carrier (2), as shown in FIGS. 3 and 4, there is a supply reel (5) holding a roll of microfilm (F), and a microfilm pulled out from the supply reel (5). A take-up reel (6) for winding up the film (F) is provided on the moving table (2A). Then, the microfilm (F) stretched over both reels (5) and (6) is transported by a plurality of guide rollers (7A
) to (7C), a pair of glass plates (8a) forming a light irradiation part (P).

(8b).

Separate drive shafts (9) and (10) are interlocked with the above-mentioned two reels (5) and (6), and these two station 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 (5) to the take-up reel (6), and by driving the film rewind motor (14), the microfilm (P) is wound onto the take-up reel (6).
It is configured such that it can be transported in the direction from which it is rewound to the supply reel (5).

Of the above-mentioned reels (5) and (6), the take-up reel (6) is pivotally supported by the film carrier (2), but the supply reel (5) is housed in the cartridge (C). , this cartridge (C) is a film carrier (
2) so that it can be attached to and detached from it.

There are currently two types of cartridges (C). One is 3M (Minn) shown in Figure 5.
esota Mining & Manufacturer
ing) M type cartridge (13A).

The other problem is the ANS I (Ame) shown in Figure 6.
rican Nation-al 5 standards
In5tituts, Inc.) type cartridge (13B).

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

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, in FIGS. 3 and 4, M type cartridge (13A) is shown for convenience.
This shows the state in which it is attached.

Supply reel (5) of drive shaft (9) to supply reel (5)
5) On the side, although not shown, there is a transmission retaining hole (5Ab) of the supply reel (5A) housed in the aforementioned M type cartridge (13A) and a transmission retaining hole (5Ab) housed in the ANSI type cartridge (13B). Two retaining portions that can be individually engaged with the transmission engagement hole (5Bb) of the supply reel (5B) are attached. These two retaining parts are configured to be movable in the axial direction of the drive shaft (9),
When the cartridge detection switch (16) detects that any type of cartridge (C) is installed in the film carrier (2), the retainer corresponding to the type of cartridge (C) is automatically activated. Supply reel (5)
It is designed to engage with.

The drive shaft (9) includes a base shaft (9A) that is interlocked and connected to the transmission mechanism (11), a cylinder shaft (9B) that is fitted onto the base shaft (9A) and can rotate integrally, and a cylinder shaft (9B) that is rotatable integrally with the base shaft (9A). It consists of a locking shaft (9C) that fits inside and can rotate integrally.
The two retaining parts 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 so that the cylinder shaft (9B) can be moved in the axial direction with respect to the base shaft (9A). Cylindrical shaft (9B
) is located on the supply reel (5) side with respect to the base shaft (9A), the two above-mentioned engaging portions are located on the cylinder shaft (9A), respectively.
B) is pressed against the supply reel (5) by the biasing force of the spring (20) that comes into contact with the edge. Of the two retaining parts, the retaining part corresponding to the type of supply reel (5) engages with the supply reel (5) and transmits the rotation of the drive shaft (9) to the supply reel (5). 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 (5), the supply reel (5) is momentarily moved in order to remove the slack in the microfilm (F). It is designed to rotate towards the sun.

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) includes a feeding roller (21) and the like that are interlocked with a film feeding motor (not shown). As shown in FIGS. 3 and 5, 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 six directions 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 (22) interlocked with the aforementioned film feeding motor, a peeling belt (23), and the like. As shown in FIGS. 3 and 6, the delivery belt (22) has an ANSI type cartridge (1
The peeling belt (23) is configured to be able to swing in and out of the notch (13Ba) of 3B) and the film delivery port (13Bb), respectively.

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, by driving the film delivery motor to rotate the delivery belt (22) and the peeling belt (23), the supply reel (5B) rotates in the direction A in the figure, and the peeling belt (23) rotates. By rotation, the tip of the microfilm (F) is peeled off and sent to the film outlet (13Bb).
It is configured to be sent to the outside.

In addition, when the M type cartridge (13A) is installed, the delivery belt (22) and peeling bell) (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. The drive is! ! The light irradiation part (P) is guided by the three guide parts (24A) to (24C) and the two guide roller pairs (7A) and (7B).
The guide roller (7C) and the two guide parts (240) pass between the pair of glass plates (8a) and (8b).
.

(24E) and reaches the take-up roller (6), where it is taken up by the nop.

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 pair of guide rollers (7A) is designed so that when the ANSI type cartridge (13B) is attached, the guide roller pair (7A) is in close contact with the thin microfilm (F) to sandwich and convey the thin microfilm (F). In the mounted state, the thick leader tape (T) is separated and roughly guided 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 it is retired from the notch (13Aa). Further, when the ANS I type cartridge (13B) is installed, the rotation of the delivery belt (22) and the peeling belt (23) is stopped 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
As shown in FIG. 4, with the film carrier (2) installed in the reader printer body (1), the condenser lenses (26a) and (26b) are connected to the light source (S).

(26c), a reflecting mirror (26d), and the like, and its center 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 CP), and the image of this micro-image (1) is transmitted through the projection lens (PL) and multiple mirrors (not shown). ), etc., to be enlarged and projected onto the screen (4) in the reader mode, and to be enlarged and copied onto recording paper by an electrophotographic process in the print mode. ing.

Further, as shown in FIG. 3, a microfilm ( F) Two long holes (2a) along the width direction
, (2b) are formed, and this elongated hole (2a),
In (2b), the two guide pins (2c) and (2d) implanted in the base (2B) are fitted in such a manner that they cannot be removed. That is, within the film carrier (2), the moving stage (2A) and the base (2B) are
It is attached so that it can be moved relative to the width direction.

Further, the rank (27) fixed to the base (2B) is positioned so as to be exposed from another elongated hole (2e) formed in the movable base (2A). And this rack (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, by driving this motor (29) when using a duo type or dublex type microfilm (F) in which two micro images are imprinted in the width direction of the microfilm (F),
It is configured to allow easy channel switching.

Further, the base (2[1) of the film carrier (2) is fixed to the table (30) on the side of the league 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). That is, instead of the film carrier (2) to which the cartridge (C) containing the roll-shaped microfilm (F) is attached, it is now possible to set a fish carrier (not shown) that holds the microfiche. There is.

In addition, on the upper glass plate (8a) of the light irradiation part (P),
A blip detector (31) is attached for detecting a so-called blip (M), which is a frame search mark imprinted on the microfilm (F) together with the microimage (I). 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 together with the light source (S) constitutes a photoinclutter. It is something.

In other words, when the film carrier (2) is installed in the league printer main body (1), the light receiving element (31) which is a blip detector detects that the light from the light source (S) is darker than the base part of the film (P). The blip (M) is detected based on the change in the received light intensity due to the blip (M) blocking the light. As the microfilm (F) is fed, this blip detector (31) detects blips (
A counter (not shown) is counted up each time M) is detected, and the frame number of the micro image (1) at that position can be known.

On the other hand, the upper roller (7Ba) of the guide roller pair (7B) located before the supply reel (5) of the light irradiation unit (P) is inverted.
A disc (32) having a plurality of slits is interlocked with the disc. Further, a photointerrupter (33) is provided which has a light emitting section and a light receiving section sandwiching the slit portion of the disk (32). Then, the microfilm (F
A film transport pulse encoder ( ) is a film transport pulse output means that outputs a pulse signal in conjunction with the transport of
PH1).

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 (PH1)
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 (F) is determined when the count result of this pulse signal reaches a predetermined number.

Then, the film transport pulse encoder (PH
1) 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 (
1) and can be projected onto the screen (4). If the print mode is selected in this state, the micro image (1) can be enlarged and copied onto recording paper.

One way to search for the desired micro-image (1) is to input the frame number attached to that micro-image (1) from the controller (3), and search for the blip CM attached to each micro-image (1). The microfilm (F) is sequentially counted each time the blip detector (31) detects it, and the microfilm (F) is conveyed until the counted 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 (M ) may be attached to each item-divided series of documents to facilitate the 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 from the film transport pulse encoder (PH1) from the time when a blip (CM) is detected by the camera and determining the length of the blip (M), the desired micro-image (I) can be searched for. .

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

Further, the drive shaft (10) for the take-up reel (6) also has a
A disk (34) having a plurality of slits is interlocked with each other, and a photo ink clubter (35) having a light emitting section and a light receiving section sandwiching the slit portion of the disk (34) is provided. The disk (34) and the photoinkractor (35) are used to generate a take-up reel, which is an example of a reel rotation pulse output means that outputs a take-up reel rotation pulse in conjunction with the rotation of the take-up reel (6). It constitutes a reel rotation pulse encoder (PH2).

In the microfilm reader printer of this embodiment, this take-up reel rotation pulse encoder (PE
2) It is configured so that the thickness of the microfilm CF to be used can be detected using the output signal obtained from the film transport pulse encoder (PEI) described above.

Specifically, the take-up reel rotation pulse encoder (PH2
) The film output from the film conveyance pulse encoder (PH1) in conjunction with the conveyance of the microfilm (F), relative to the pulse rate of the take-up reel rotation pulse outputted in conjunction with the rotation of the take-up reel (6). Find the ratio of the pulse rate of the transport pulse, and combine this pulse rate ratio with a pre-stored reference thickness (for example, the thickness of [5a+il])
The microfilm (F) is compared with a reference pulse rate ratio when using the microfilm (F), and the thickness of the microfilm (P) is determined according to the comparison result.

In other words, the thicker the microfilm (F), the smaller the amount of increase in the winding diameter on the take-up reel (6) per unit length, so the amount of transport of the microfilm (CF) per rotation of the take-up reel (6) is The rate of increase increases. Therefore,
The amount of transport of the microfilm (F) while a predetermined number of take-up reel rotation pulses are output increases as the microfilm (F) becomes thicker. The rate ratio changes depending on the thickness of the microfilm (F).

Therefore, we prepared a microfilm (F) with a thickness of [5 mN] in advance.
) to determine the above-mentioned pulse rate ratio and store it as a reference pulse rate ratio, and then measure the pulse rate ratio for the microfilm (F) actually used after loading onto the take-up reel (6) is completed. By comparing with the reference pulse rate ratio of the lever, if the microfilm (F) is [5 mil], it matches the reference pulse rate ratio, and if the microfilm (F) is [2,5a+il], the reference pulse rate ratio is the same. The thickness of the microfilm (F) can be detected by the fact that the thickness of the microfilm (F) is less than .

Furthermore, the drive shaft (9) for the supply reel (5) also includes:
A disk (37) having a plurality of slits, and a disk (37) having a plurality of slits.
37) is provided. This disk (37) and photo interrupter (38)
) constitutes a supply reel rotation pulse encoder (PE3) that outputs a supply reel rotation pulse in conjunction with the rotation of the supply reel (5).

And this supply reel rotation pulse encoder (PH3
), and the aforementioned film transport pulse encoder (P
Using the output signal obtained from the supply reel (5
) is detected, and based on the detection result, when the remaining amount of microfilm (CF) reaches a predetermined amount, the transport speed of the microfilm (F) is reduced to a low speed. It is configured to switch.

In other words, the film feed knob (36) described above is configured so that the microfilm (F) can be fed at either a desired high speed or a constant low speed depending on the amount of operation. When the microfilm (F) is transported at high speed so that a quick microimage search can be performed, the end of the microfilm (F) is latched to the core of the supply reel (5). Therefore, in order to reduce the impact applied to the microfilm (F) at the end of the transport, the transport speed is forcibly lowered at the end portion of the microfilm (F).

Specifically, the timing of switching the transport speed is determined by comparing the ratio of the pulse rate of the supply reel rotation pulse to the pulse rate of the film transport pulse with a reference Hull rate ratio. The relationship between the pulse rates of these two pulses changes depending on the remaining amount of the microfilm (F) and the thickness of the microfilm (F). Further, since the core diameter differs depending on the type of cartridge (C), the relationship changes.

Therefore, by changing the timing of switching the conveyance speed described above according to the type of cartridge (C) detected and the thickness of the microfilm (F), the supply reel (5
) is configured such that the transport speed is switched to a low speed when the length of the microfilm (F) remaining on the film is always the same.

The length [L] of the microfilm (P) remaining on the supply reel (5), the thickness [1] of the microfilm (F), and
The following relational expression holds between the core diameter [d] of the supply reel (5).

D ” v〆4.1 go-t/i +d”
<1> However, D: Film winding diameter, which is the sum of the core of the supply reel (5) and the winding thickness of the microfilm (F) wound around the core.If the film transport speed is constant, the film winding diameter [D ] becomes larger, the pulse rate of the supply reel rotation pulse becomes smaller. Furthermore, the pulse rates of the supply reel rotation pulse and the film transport pulse both increase as the film transport speed increases. Therefore,
The ratio of these two pulse rates changes depending on the film winding diameter [D] regardless of the film transport speed.

The core diameter [d] of the cartridge (C) is [401u] for the 3M type, and [32m] for the ANSI type.
]. And the cartridge detection switch (16)
Depending on the type of cartridge (C) determined from the state, substitute any of the above values as the core diameter [d] into formula (1), and calculate the thickness [t] of the detected microfilm (F).
(In this example, [0,12711] or [0,063
Substituting the value for the microfilm (F
) by substituting the remaining length as the set length [LO], the set film winding diameter [D0] at this timing can be determined.

Ratio of the two pulse rates mentioned above and film winding diameter CD]
The relationship between the two is measured and stored in advance, and using this stored relationship, the micro It is configured so that the transport speed of the film (F) can be switched.

As a result, regardless of the thickness of the microfilm (F),
While sufficiently reducing the impact when transporting the end portion of the microfilm (F), the microfilm (F) is moved to the take-up reel (6) as quickly as possible without unnecessarily switching to a low speed from an early stage. It can be rolled up.

Next, a control system (CD) that controls the operation of the microfilm reader printer having the above configuration will be explained.

As shown in FIG. 1, the main part of this control system (CD) consists of a microcomputer (MC).

The input port (PI) of this microcomputer (MC)
I) to (PI5) include the output signal from the cartridge detection switch (16) described earlier and the blip detector (3).
Output signal from 1) and film advance knob (36)
Three switches (Sl) to (
S, ) status signals are input.

The states of the three switches (S,) to (S3) mentioned above are as follows:
It is set to change as follows. With the film advance knob (36) in the central position, only the third switch (S,) is closed. At this time, the transport of the microfilm (F) is stopped. In addition, turning the film advance knob (36) to the right or left corresponds to the operation of transporting the microfilm (F) in the forward or reverse direction, and the transport speed of the microfilm (F) changes depending on the amount of operation. It is configured so that it can be used.

The first switch (S+) is the film advance knob (36)
The microfilm (F) is closed only when it is to the right of the center, and at this time the microfilm (F) is transported in the forward direction.

Depending on the state of this switch (Sυ), which motor (14 or 15) for forward/reverse conveyance is to be driven is selected.

Also, the second switch (S2) is the film advance knob (
36) is closed when it is operated more than a predetermined amount to either the left or right, and the transport speed of the microfilm (F) can be switched between a constant low speed and an arbitrary high speed. ing.

That is, when the first switch (S+) is closed, that is, when the film advance knob (36) is turned to the right,
Microcomputer (MC) output (POI)
) becomes “L” level, and the relay (Ry
1) is in the "OFF" state, and the relay contact (T1) remains as shown. Therefore, the film winding motor (15) that transports the microfilm (F) in the forward direction is driven.

In addition, when this switch (S,) is in the open state, that is, when the film advance knob (36) is turned to the left, the output signal from the output port (POI) of the microcomputer (MC) is at the "H" level. The relay (Ryl) becomes "ON" and the relay contact (T1) is switched to the left in the figure. Therefore, the film return motor (14) that transports the microfilm (F) in the reverse direction is driven.

On the other hand, this film advance knob (36) is connected to a variable resistor (V
R), and the output voltage according to the amount of operation is
Analog switch (44) via absolute value circuit (39)
is input to one terminal (i) of

A reference voltage set to a predetermined value is input to the other terminal (j) of this analog switch (40).

The analog switch (40) then connects the two motors (14) and (15) according to the state of the output signal from the output port (PO2) of the microcomputer (MC).
The input voltage to the drive current control circuit (41) can be switched between the reference voltage mentioned above and the output voltage from the variable resistor (v8).

When the film advance knob (36) is slightly turned in either the left or right direction and the switch (St) is still in the open state, the output signal from the output port (PO2) is at the H'' level. The analog switch (40) is
The connection is switched to the lower terminal (j) in the figure, and a reference voltage is input to the drive current control circuit (41). In this state, the microfilm (F) is transported in either forward or reverse direction at a constant low speed.

Further, when the film advance knob (36) is further turned and the switch (Sz) is closed, the microcomputer (
The output signal from the output port (PO2) of MC) is “L”
become the level. At this time, the connection of the analog switch (40) is switched to the upper terminal (i) in the figure, and the output voltage from the variable resistor (V*) is input to the drive current control circuit (41). In this state, a drive current corresponding to the operation amount of the variable resistor (vm) is applied to either the forward or reverse motor (14 or 15). Therefore, the film advance knob (
36) at a speed corresponding to the amount of rotation of the microfilm (
F) will be transported in either forward or reverse direction.

Furthermore, when the film advance knob (36) is positioned at the center while the microfilm (F) is being transported, that is, when the film advance is stopped, the output from the output port (PO2) of the microcomputer (MC) is The signal changes to "H" level. At this time, the connection of the analog switch (40) is switched to the lower terminal (j) in the figure, and the reference voltage is input to the drive current control circuit (41). In this state, a predetermined amount of drive current is applied to either the forward or reverse motor (14 or 15).

On the other hand, the input port (P
I6) has a film transport pulse encoder (PH1)
A counter (
42) is input. Furthermore, the interrupt input board (INT) of the microcomputer (MC)
In this example, a component is generated that receives the take-up reel rotation pulse output from the take-up reel rotation pulse encoder (pH!2) and outputs an interrupt pulse when [rl] of these take-up reel rotation pulses are output. A lap counter (43) is connected.

When the above interrupt pulse is input to the microcomputer (MC) at its interrupt input port (INT), the microcomputer (MC) reads the output signal from the counter (42) input to the input port (PI6). The interrupt pulse from the frequency division counter (43) is the [n
Since it is output one by one, the count value read from the counter (42) corresponds to the conveyance amount of the microfilm (F) until the take-up reel rotation pulse is output at a predetermined number [n] ratio. , is proportional to the ratio of the pulse rate of the film transport pulse to the pulse rate of the take-up reel rotation pulse. That is, a portion that latches the count value from the counter (42) in response to an interrupt pulse from the frequency division counter (43) serves as a pulse rate ratio detection means (PRD).

The pulse rate of the take-up reel rotation pulse is proportional to the rotation speed of the take-up reel (6). Further, the pulse rate of the film transport pulse is proportional to the transport speed of the microfilm (F). Therefore, the pulse rate ratio detection means (PRD
The pulse rate ratio detected by the take-up reel (
6) is the ratio of the transport speed of the microfilm (F) to the rotation speed. That is, the pulse rate ratio detection means (PRD) is the speed ratio detection means according to the present invention.

The take-up reel rotation pulse generating means (PE2) and the frequency dividing counter (43) constitute a reel rotation speed detecting means (RV) that converts the rotation speed information of the take-up reel (6) into a count value and outputs the count value. are doing. Further, the film transport pulse generating means (PEI) and the counter (42) constitute a film transport speed detecting means (TV) that converts the transport speed information of the microfilm (F) into a count value and outputs the counted value.

The microcomputer (MC) is equipped with a ROM (44) and a RAM (45) as storage means. In the ROM (44), [5ml]
Using a microfilm (F) with a thickness of ing. This reference count value is proportional to the ratio of the pulse rate of the film transport pulse to the pulse rate of the reel rotation pulse when using a microfilm (F) with a thickness of [5ml], that is, the reference Hull rate ratio.

The output signal from the pulse rate ratio detection means (PRD) mentioned above, that is, the count value of the counter (42) and this R
The standard count value extracted from OM (44) is
The signals are input to a pulse rate ratio comparison means (PRC) and compared. If the above count value is equal to the standard count value within the error range, the microfilm (F) used is [
5n+il]. Further, if the count value is smaller than the reference count value, it is determined that the microfilm (F) being used has a thickness of [2,5n+il].

That is, here, a microfilm (F) of unknown thickness is used.
The count value obtained when using the counter (42) is compared with the reference count value, but as mentioned above, since the timing of reading the count value from the counter (42) is the same,
In practice, this means that the ratio of the pulse rate of the film transport pulse to the pulse rate of the take-up reel rotation pulse, that is, the transport speed of the microfilm (P) to the rotation speed of the take-up reel (6) The ratio is to be compared to a reference speed ratio expressed as a reference pulse rate ratio.

The result determined in this manner is output as a film thickness signal from a pulse rate ratio comparison means (PRC), which is an example of a speed ratio comparison means.

The control system (CD) of this embodiment uses this film thickness signal and a cartridge identification signal obtained by determining the output signal from the cartridge detection switch (16) input to the input port (pH). , the take-up reel (6
) is configured to obtain the set film roll diameter [Do]. This calculation is performed by the set value calculation means (S
C).

The film winding diameter CD, which changes every moment during transport, is
Pulse rate of film transport pulse and input port (PI
It is converted from the ratio of the pulse rate of the supply reel rotation pulse input to T) via the counter (46). The measured value calculation means (DC) performs this calculation.

Then, the film winding diameter [D] determined in this way
A comparison means (CM
), and depending on the comparison result, the output signal from the output boat (PO2) is changed, and when the remaining length of the microfilm (P) is less than a predetermined amount, the transport speed is reduced to a constant low speed. It is configured to switch.

Other microcomputer (MC) input capo)
Output signals from various input devices are input to the (PIX), and output signals from the microcomputer (MC) are input to the output port 1 of the microcomputer (MC).
'(PO) outputs control signals to various output devices.

Next, a part of the operation of the microfilm reader printer having the above configuration will be explained using the flowcharts shown in FIGS. 7 and 8.

FIG. 7 shows a routine flowchart for detecting the thickness of the microfilm (F).

When the loading of the microfilm CF) onto the take-up reel (6) is completed (#1), a frequency dividing counter (43) that receives output pulses from the take-up reel rotation pulse encoder (PH2) and a film transport pulse encoder (P.E.
a counter (42) receiving output pulses from I);
Both counters (42) and (
43) and start the pulse count (#2.1).
13), then the film winding motor (15) starts rotating (#4).

Next, check the status of the interrupt input board (INT) (#5)
, if an interrupt pulse is input, the count value [Nd] output from the counter (42) is read (#6).

Compare this count 4aCNd with the reference count value [No] in the ROM (44).
If Ndl is greater than or equal to the reference count value [N01, it is determined that the thickness of the microfilm (F) is [5ml] t18), and conversely, the count value [Ndl is greater than or equal to the reference count value [
If it is smaller than [NO], it is determined that the thickness of the microfilm (F) is [2.5ml] (#9), and the routine for detecting the thickness of the microfilm (F) is ended.

FIG. 8 shows a flowchart of a routine for switching the transport speed of the microfilm (F).

The thickness of the microfilm (F) determined by the aforementioned microfilm (F) thickness detection routine and the type of cartridge (C) identified based on the output signal from the cartridge detection switch (16). (#11 to #13), microfilm (F
) Set film winding diameter [00] on the supply reel (5) corresponding to the timing at which the transport speed of the film should be changed to a low speed
is set to a predetermined value [n+co~[D4] (#14~
117).

Next, when the current film winding diameter [Dd], which is determined using the pulse rate of the film transport pulse and the pulse rate of the supply reel rotation pulse, becomes equal to or less than the set film winding diameter [D0], the output capo is activated. Change the output signal from PO2) to “H” level and turn the film advance knob (36).
Regardless of the state, the transport speed of the microfilm (F) is switched to a constant low speed ($19), and the transport speed switching routine is completed.

[Another example]

In the previous example, the microfilm (F) used was [
Since there were two types, 5ml1l] and [2,5ml1lF, only one standard pulse rate ratio was set for detecting the thickness of the microfilm (F). If the number of F) increases, a plurality of reference pulse rate ratios may be set.

In addition, in the previous embodiment, the thickness of the microfilm (F) was detected using the take-up reel rotation pulse and the film transport pulse, but instead of this, The thickness may be detected using supply reel rotation pulses and film transport pulses.

That is, the reel (R) whose rotational speed should be detected by the reel rotational speed detection means (RV) may be the supply reel (5) or the take-up reel (6).

Furthermore, in the previous example, the rotational speed of the reel (R) and the conveyance speed of the microfilm CF) were both
Although the configuration is such that the speeds are detected digitally using pulse signals output from the pulse encoder, the speeds may be detected analogously using a speed sensor or the like.

Furthermore, in the previous embodiment, a configuration was described in which the speed of the microfilm (F) was controlled by combining the thickness of the microfilm (F) and the type of the cartridge (C). If the machine is dedicated to cartridge (C) only, the configuration for combining the cartridge type may be omitted. In addition, based on the detected thickness information of the microfilm (F), the overall transport speed may be shifted so that the thinner the film is, the slower the film is transported, or the light source (the thinner the film is, the lower the amount of irradiation light is). S) may be configured to control the amount of irradiation light.

The film conveying device according to the present invention is applicable not only to the microfilm (F) described in the previous embodiment, but also to various motion picture films, still camera films, etc. (collectively referred to as film (P)). It can also be applied to the target object.

〔Effect of the invention〕

As described above, according to the film transport device according to the present invention, the thickness of the film can be detected by simple modification of the conventional configuration. It is now possible to always reliably control film transport by changing the speed according to the amount of film transport, regardless of the thickness of the film. Additionally, it has become possible to perform various controls such as controlling the amount of light irradiated onto the film and switching the maximum speed at which the film is transported, depending on the detected film thickness information.

[Brief explanation of the drawing]

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 an ANSI type cartridge, FIG. 7 is a flowchart of a film thickness detection subroutine, and FIG. 8 is a flowchart of a film transport speed switching subroutine. (R)...Reel, (F)...Film, (TV)...Film transport speed detection means,
(RV)... Reel rotation speed detection means, (PR
D)... Speed ratio detection means, (PRC)...
...Speed ratio comparison means.

Claims (1)

[Claims] A film transport speed detection means for detecting a film transport speed and a reel rotation speed detection means for detecting a reel rotation speed, the film transport speed detected by the film transport speed detection means and the reel rotation speed detection means A speed ratio detection means for detecting the ratio of the reel rotation speed detected by the speed ratio detection means, and a speed ratio detected by the speed ratio detection means and a reference speed ratio when using a film of a reference thickness. A film conveying device provided with speed ratio comparison means for outputting the comparison result as a film thickness signal.