JP3516775B2 - Film supply device and film supply method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding device and a film feeding method, and more particularly to a film feeding device and a film feeding method for applying a long rolled film.

[0002]

2. Description of the Related Art Conventionally, an image reading device (scanner) reads an image on a photographic film, obtains exposure correction data with a video color analyzer, and records it on an LSI card or the like. In order to do this rapidly and in large quantities, several negative films are spliced together into a roll. The rolled negative film is processed by passing its leading end (leader part) along the transport path to put it in a standby state. The rolled negative film is then provided to the subsequent step as it is rolled, subjected to a series of treatments, and finally cut by a cutter to be returned to one negative film.

Here, when the roll-shaped photographic film loaded in the supply reel is taken up by the take-up reel arranged corresponding to the supply reel, the photographic film has a predetermined linear speed (a predetermined supply speed in the supply reel). It is configured to be transported on a predetermined transport path at a peripheral speed. In order to obtain a prescribed linear velocity (peripheral velocity) between these reels, the outer diameter of the rolled photographic film is detected and the take-up reel is rotated so that the linear velocity is close to a prescribed target value. Control the number.

However, in the above method, since the outer diameter of the roll-shaped photographic film set on the supply reel is not known, the rotation speed of the supply reel is controlled according to the outer diameter of the roll to set the negative supply linear velocity to a predetermined value. Cannot be the target value of.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above facts, and provides a film supply device and a film supply method capable of supplying a roll-shaped film easily and appropriately according to the outer diameter. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided a film supply device for feeding a roll-shaped film wound around a delivery side reel to a predetermined conveying path. A loading unit that guides and conveys a predetermined amount to the conveying route, a rotation speed detection unit that detects the rotation speed of the delivery-side reel, a rotation speed obtained by the rotation speed detection unit, and a fixed amount by the loading unit. Outer diameter calculation means for calculating an initial value of the outer diameter of the roll-shaped film wound on the delivery side reel, reel driving means for rotationally driving the delivery side reel, and the outer diameter calculation means. The initial rotation speed of the delivery-side reel is set based on the initial value of the outer diameter calculated by, and the outer diameter of the roll-shaped film is reduced from the initial value. It is characterized by having a control means for increasing the rotational speed of the delivery reel at a rate that is predetermined according.

According to this, the outer diameter of the roll-shaped film wound around the delivery-side reel is initially determined from the transport of the predetermined amount at the time of loading by the loading means and the rotation speed of the delivery-side reel at the time of loading by the rotation speed detection means. The value is simply obtained, the initial rotation speed of the delivery-side reel is set by the control means, and the rotation speed of the delivery-side reel is increased according to the decrease in the outer diameter. Therefore, it is possible to maintain a predetermined linear velocity even for roll-shaped films having different outer diameters, and it is possible to properly supply the film even if the outer diameters are reduced.

According to a second aspect of the present invention, there is provided a film feeding method for feeding a roll-shaped film wound around a delivery side reel to a predetermined feeding path, wherein the outermost layer of the roll-shaped film is drawn out by a constant feeding amount. Then, the number of rotations of the delivery-side reel that rotates by loading during loading is detected on the predetermined delivery path is detected, and the delivery-side reel is loaded based on the detected number of rotations and the certain transport amount. Obtaining the outer diameter initial value of the roll-shaped film, based on the outer diameter initial value, set the initial rotation speed of the delivery-side reel, according to the decrease from the outer diameter initial value, at a predetermined ratio. The rotation speed of the delivery-side reel is increased.

According to this, the initial value of the outer diameter of the roll-shaped film wound around the delivery-side reel is obtained from the number of rotations of the delivery-side reel that accompanies a certain amount of withdrawal during loading, and the initial rotation of the delivery-side reel is performed. Since the speed is set, the rotation speed of the sending side reel is increased according to the decrease of the outer diameter,
The linear velocity of the film can be kept constant. Therefore, even if the outer diameter of the film wound around the delivery side reel is different, the predetermined linear velocity of the film can be easily maintained, and even if the outer diameter is reduced, the film can be properly supplied. it can.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a scanner 10 to which the present invention can be applied. Here, FIG. 1 shows a scanner 10
FIG. 2 is a schematic overall view centering on the transport section 42 of FIG.

As shown in FIG. 2, the scanner 10 includes
A light source section 20 dedicated to photometry, a sensor section 30 for reading and analyzing image information of an image recorded on the negative film 12, and a conveying section 42 for conveying the negative film 12 are provided. The negative film 12 wound in layers along the axis 44A is loaded on the supply reel 44 provided on the left side of FIG. 2 (upper left side in FIG. 1). The negative film 12 is supplied to the conveying section 42 by the holding section 80 arranged near the supply reel 44, passes through the negative carrier 48 provided in the middle of the conveying section 42, and the right side in FIG. 2 (the upper right side in FIG. 1). The reel 46 is wound around the shaft 46A of the take-up reel 46 in layers.

The negative film 12 applicable to the scanner 10 shown in FIG. 3 is formed into a long shape by bonding several films, and then wound up into a roll shape. As shown in FIG. 3, the negative film 12 is provided with a large number of image frames 12A in which images are recorded at predetermined intervals along the longitudinal direction. The negative film 12 has a perforation 14 formed at a predetermined one end in the width direction so as to match the position of each image frame 12A, whereby the position of the image frame 12A can be discriminated together with the front and back of the negative film 12. It is like this.

A magnetic track 16 for recording magnetic information is provided at a position adjacent to the image frame 12A between the perforations 14.

The magnetic track 16 is formed on the back surface of the negative film 12 which is the outer side in a wound state. The magnetic track 16 is used for taking information of the image recorded in each image frame 12A and for printing processing. Various information such as print size and exposure conditions is recorded. The magnetic track 16 provided at the end opposite to the perforation 14 has information recorded at the time of photographing mainly by a photographing device such as a camera. Further, the negative film 12 has a D at the end opposite to the side where the perforations 16 are formed.
A bar code 18 indicating an X code is recorded so that the negative film 12 can be specified.

The light source section 20 dedicated to photometry provided in the scanner 10 is provided with a light source 22 composed of a halogen lamp and a reflector. In the optical path L of the light beam emitted from the light source 22, C (cyan), M (magenta),
A filter unit 2 including a cut filter for each color of Y (yellow) and an ND filter used for adjusting the amount of light
4 are provided. Each filter of the filter unit 24 is
It is inserted into or removed from the optical path L according to a signal from the driver 26.

In the optical path L below the filter section 24 in FIG.
A negative carrier 48, which will be described later, is arranged with the light diffusing cylinder 28 in between. The negative carrier 48 positions the long negative film 12 at a predetermined position, and at the same time, the negative roller 48 carries the conveying roller 5
It is designed to be sandwiched by two and the pressing roller 54 which opposes this. Further, the transport roller 52 is configured to perform intermittent transport during forward transport from the supply reel 44 to the take-up reel 46, and perform constant speed transport during return transport from the take-up reel 46 to the supply reel 44.

An exposure calculation sensor 32 is arranged on the optical path L below the negative carrier 48 in FIG. The exposure calculation sensor 32 is composed of a CCD element composed of pixels arranged in a 256 × 256 matrix. The exposure calculation sensor 32 is connected to the exposure calculation section 33, and data of an image captured by this CCD element is calculated. The calculated exposure value is used as the exposure calculation unit 3
The information is input to the information processing unit 74 (see FIG. 2) connected to the No. 3 unit. Further, the exposure calculation sensor 32 has a filter (not shown) on the light source 22 side, which is matched to the characteristics of the negative film 12 and the printing paper.

The negative carrier 48 and the exposure calculation sensor 32
A lens 34 and a half mirror 36 are arranged between and. The lens 34 is movable along the optical path L, so that the enlargement magnification can be changed.

The half mirror 36 is adapted to pass and reflect the transmission image of the negative film 12. The reflected transmission image reaches the video sensor 38. The video sensor 38 is composed of a CCD sensor of 640 × 480 pixels, and the negative film 1
The image above 2 is picked up. Further, the video sensor 38 is connected to the monitor 40 via the image processing unit 39, and the image picked up by this CCD element can be corrected by the correction value input from the monitor 40. Further, the image processing unit 39 is connected to the information processing unit 74, and the corrected image information is input to the information processing unit 74.

Next, the negative carrier 48 will be described with reference to FIG. The light source unit 20 is provided at the center of the negative carrier 48.
The opening 50 is provided at a position where the optical axis L of (see FIG. 2) passes, and the image frame 1 of the negative film 12 positioned in the opening 50 when the optical axis L passes through the negative carrier 48.
The sensor unit 30 (see FIG. 2) can be transmitted through 2A. Further, the negative carrier 48 is provided with a conveyance path 56, and the image frame 12 of the negative film 12 is
A can be sequentially guided to the opening 50. Further, the width dimension of the transport path 56 is substantially the same as the width dimension of the negative film 12, so that the shift in the width direction during the transport of the negative film 12 is prevented.

A pair of reading heads 58 are provided at both ends in the width direction on the conveying path 56 on the upstream side of the opening 50 of the negative carrier 48 in the conveying direction of the negative film 12. The reading head 58 moves the negative film 1 onto the transport path 56.
Magnetic tracks 16 provided on both sides in the width direction of the negative film 12 when the two are arranged and transported (see FIG. 3).
And magnetic information recorded on the magnetic track 16 is read. One of the read heads 58 reads the printing information recorded on one magnetic track 16 of the image frame 12A to be read at the time of reordering, and the other read camera 58 is a camera recorded on the other magnetic track 16 of the image frame 12A. It is designed to read information.

The reading head 58 is arranged between two adjacent image frames 12A when the image frame 12A is positioned in the photometric opening 50. As a result, the negative film 12 is supplied to the supply reel 4 for photometry of the image frame 12A.
In the case of intermittent transport from 4 to the take-up reel 46 (forward transport), the magnetic information for one image frame can be read by transporting one image frame after the photometry is completed.

A recording head 60 is arranged substantially in the center of the conveying path 56 of the negative carrier 48. The recording head 60 is
The recording head 60 is provided at one end of the transport path 56 and is connected to the information processing section 74 (see FIG. 2). The recording head 60 uses the magnetic track 16 of the negative film 12 when the negative film 12 is conveyed at a constant speed during the backward conveyance.
The exposure correction data obtained by photometry is recorded in sliding contact with. As a result, the exposure correction data obtained by photometry on the outward path is recorded by the recording head 60, and the recorded data can be read and reused by the reading head 58 provided on the same side when reordering. It has become.

In the negative carrier 48, the read head 5
8 is a transport path 56 further upstream in the negative film transport direction.
An optical sensor unit 64 including a plurality of sensors 62 is provided on the top. As a result, the negative film 1
The splice portion of 2 is detected to identify one negative film, the perforation 14 formed on the negative film 12 is detected to identify the image frame 12A, and each image frame 12A is accurately guided to the opening 50. It is supposed to be placed. Further, the sensor 62 is the negative film 12
The upper bar code 18 can be detected to identify the negative film 12, and the image density of the recorded image frame 12A can be measured to detect the size of the image frame 12A and the first image frame 12A and the final image frame 12A. You can do it. Further, the other sensor 62 can detect a blank frame by judging whether or not an image is recorded on the image frame 12A.

A conveying roller 52 is arranged on a conveying path 56 downstream of the opening 50 in the conveying direction of the negative film 12, and holds the negative film 12 together with a pressing roller 54 (see FIG. 2) facing the conveying roller 52. And is carried by a predetermined carrying amount. The transport roller 52 is connected to the information processing unit 74 via a transport control unit (not shown) and intermittently transports the negative film 12 so that the image frame 12A can be positioned in the opening 50 during forward transport, and during reverse transport. The negative film 12 for one roll is conveyed at a constant speed.

As a result, when the negative film 12 is supplied to the negative carrier 48, the negative film 1 is fed in the outward path.
2 is intermittently conveyed by the conveying roller 52 and the image frame 12A
Is positioned in the opening 50, and the image of the positioned image frame is metered by the light beam from the light source unit 20.
Further, during intermittent conveyance, various optical information is read by the optical sensor section 64 and magnetic information is read by the read head 58 for the other image frame 12A. On the other hand, at the time of the return trip, 1 collected on the take-up reel 46
The wound negative film 12 is transported at a constant speed on the transport path 56,
The magnetic track 16 is brought into sliding contact with the recording head 60 at a constant speed.
The information obtained by photometry is recorded.

A plurality of fixed rollers 66 and a plurality of reservoir rollers 68 are provided in the transport section 42 which transports the negative film 12.
A and 68B are provided (note that some of the fixed rollers 66 are omitted in FIG. 2 and the position of each roller is also schematically shown).

The reservoir rollers 68A and 68B are arranged between the two fixed rollers 66 (see FIG. 1) and are connected to a loading control unit (not shown), and a predetermined moving path is provided according to an instruction from the loading control unit. According to the position.

The reservoir roller 68A is a supply reel 44.
It is arranged between the negative carrier 48 and the negative carrier 48, and moves the moving path from one side to the other side to push out the negative film 12 to form the reservoir 70 and control the brake of the supply reel 44. Further, the size of the reservoir 70 is changed by moving the moving path depending on the amount of the negative film 12 delivered from the supply reel 44 and the amount of conveyance by the negative carrier 48 so that the negative film 12 is not subjected to excessive tension. .

On the other hand, the reservoir roller 68B is arranged between the negative carrier 48 and the take-up reel 46, moves from one side to the other in a predetermined moving path, and pushes out the negative film 12 to form the reservoir 72, which is wound up. Whether or not the take-up reel 46 can be operated is determined. Also negative carrier 48
The moving path is moved depending on the amount of the negative film 12 delivered from the reel and the amount of the negative film 12 wound on the take-up reel 48
The size of the reservoir 72 is changed so that the negative film 12 is not excessively tensioned.

A holding section 80 (see FIG. 1) for supplying the leading end of the negative film 12 loaded on the supply reel 44 to the transport section 42 is provided between the reservoir 70 and the supply reel 44. There is.

As shown in FIG. 5, the holding unit 80
Is provided with an arm 82 that can rotate about the shaft 44A of the supply reel 44, and a hold roller 84 is provided at the tip of the arm 82. This makes the arm 8
With the movement of 2, the hold roller 84 moves along a predetermined movement path.

To extend the movement path of the hold roller 84,
A drive roller 86 is provided so that the hold roller 84 that has moved along the movement path and the negative film 12 drawn from the supply reel 44 can be held.

The drive roller 86 is connected to the drive control section 110 via a drive motor (not shown), and supplies the leading end of the negative film 12 to the supply path 88 in accordance with a signal from the drive control section 110. At the time of loading, the negative film 12 is transported by a designated transport amount.

The drive control section 110 gives an instruction to carry a predetermined amount of the negative film 12 at the time of loading, and detects the carry amount of the negative film 12 when the loading is completed and a predetermined process is executed. It is like this. The drive control unit 110 is connected to the outer diameter measuring unit 112, and outputs the conveyance amount of the negative film 12 to the outer diameter measuring unit 112. As a result, the outer diameter measuring unit 112 can perform a predetermined process based on the transport amount of the negative film 12.

A supply path 88 for supplying the negative film 12 to the conveying section 42 is provided below the holding position of the negative film 12 (H position in FIG. 5) by the hold roller 84 and the drive roller 86 in FIG. The negative film 12 sandwiched by the hold roller 84 and the drive roller 86 can be easily supplied to the subsequent transport unit 42 (see FIG. 1) via the supply path 88.

Negative film 12 holding position and supply path 88
A guide 90 that is held at a predetermined angle and distance with respect to the supply passage 88 is provided between the inlet and the
The leading end of the negative film 12 sandwiched by the hold roller 84 and the drive roller 86 is guided to the entrance of the supply path 88.

As shown in FIGS. 5 and 6, the supply reel 44 is provided with a measuring section 92 for measuring the outer diameter of the roll-shaped negative film 12 to be loaded.

The measuring section 92 is a shaft 44A of the supply reel 44.
And a slit plate 94 capable of coaxial movement. The slit plate 94 is a disk-shaped member attached to the back surface of the supply reel 44 on which the negative film 12 is not loaded, and is adapted to rotate as the supply reel 44 rotates.

The shaft 94A of the slit plate 94 projects in a rectangular shape from the slit plate 94, and the shaft 4A of the supply reel 44 is provided.
4A is fitted in a rectangular insertion hole 44B. As a result, when the supply reel 44 rotates, the slit plate 94 coaxially rotates at the same rate via the shaft 94A.

At the outer peripheral edge of the slit plate 94, slits 96 are continuously formed along the periphery at predetermined intervals,
The position is adapted to move as the slit plate 94 rotates.

As shown in FIG. 6, the sensor 100 is provided between the slit plate 94 and the pedestal portion 10A of the scanner 10.
Are provided, and the slit detector 98 of the sensor 100 is arranged so as to detect the position of the slit 96 (see FIG. 5). The sensor 100 has a support portion 10 on the side surface.
2 and has a screw 104 inserted into a hole 102A formed in the support portion 102, and is fixed to the pedestal portion 10A of the scanner 10.

As a result, when the supply reel 44 rotates, the slit plate 94 rotates accordingly and the slit 9
The position of 6 moves according to the rotation of the supply reel 44,
The sensor 100 is adapted to detect the position of the slit 96.

Washers 106 and 108 are arranged between the supply reel 44 and the slit plate 94 and between the slit plate 94 and the pedestal portion 10A of the scanner 10, and a shaft 109 is provided in each member as an insertion hole. 44B, 106
By being inserted through A, 94B, 108A, and 10B, the supply reel 44 and the slit plate 92 are provided at predetermined intervals.
And the pedestal portion 10 of the scanner 10 are separated from each other.

The sensors 100 are each connected to the outer diameter measuring section 112, generate a pulse signal from the movement of the slit 96 detected by the sensor 100, and measure the outer diameter based on the outer diameter measuring method described later. It is like this.

As shown in FIG. 5, the outer diameter measuring section 112
Is connected to the supply reel drive control unit 114, and the supply reel drive control unit 114 controls the drive of the supply reel 44 based on the outer diameter measured by the outer diameter measurement unit 112.

Next, the measurement of the initial value of the outer diameter of the negative film 12 loaded on the supply reel 44 will be described.

The initial value of the outer diameter of the negative film 12 is set such that after the leading end of the negative film 12 is supplied to the supply path 88, the drive controller 86 drives the drive roller 86 by a certain amount to move the negative film 12 in the feeding direction. The feeding reel 44 is conveyed, and the number of rotations of the supply reel 44 at this time is detected by the sensor 100 and is calculated by the outer diameter measuring unit 112. The initial rotation speed of the supply reel 44 is set on the basis of the outer diameter initial value obtained by the calculation.

As shown in FIG. 7A, the scanner 1
Since two sensors 100 are arranged on the pedestal portion 10A at a predetermined distance apart from each other at 0 (see FIG. 6), when detecting the slits 96 provided at a predetermined distance, the slits 96 are divided into two. The sensor 100 recognizes two types of pulse signals having a predetermined phase difference. Thereby, from the pulse signal of 1 to the supply reel 4
The rotation number of 4 can be obtained, and the loading direction can be detected by confirming the rotation direction of the supply reel 44 from the predetermined phase difference between the two types of pulse signals.

Therefore, at the time of loading, the drive roller 86
When the negative film 12 is conveyed by a certain amount, the outer diameter measuring unit 112 can determine the rotation speed of the supply reel 44 based on the pulse signals from the two sensors 100.

When the number of rotations of the supply reel 44 is detected,
Since the transport amount of the negative film 12 transported by the drive roller 86 is controlled to be constant by the transport controller 110, the outer diameter initial value can be obtained based on the following equation.

[0053]

[Equation 1]

Supply reel 44 obtained based on the above equation
From the initial value of the outer diameter of the negative film 12 loaded in
The supply reel drive control unit 114 rotates the supply reel 44 at an appropriate initial rotation speed in order to maintain a predetermined linear velocity.

Further, as shown in FIG. 7B, the rotation speed of the supply reel 44 and the outer diameter of the negative film 12 loaded on the supply reel 44, which are obtained based on the above formula, are:
A certain relationship holds. As a result, when a predetermined process is sequentially performed on the negative film 12 loaded on the supply reel 44, the outer diameter of the negative film 12 is reduced at a predetermined rate. Therefore, as the outer diameter decreases from the initial value of the outer diameter as the process progresses, the rotation speed of the supply reel 44 increases at a predetermined rate according to the outer diameter.
The negative film 12 is properly conveyed.

Next, the operation of this embodiment will be described. The roll-shaped developed negative film 12 is loaded on the supply reel 44 provided at one end of the scanner 10, the leading end portion is pulled out, and is nipped by the hold roller 84 and the drive roller 86, and is conveyed through the supply path 88 to the transport unit 42. I will guide you to. When the negative film 12 is guided to the transport section 42, the negative film 12 is passed through the transport path by the auto loading mechanism, the reservoir rollers 68A and 68B move, the reservoirs 70 and 72 are formed, and the standby state is set.

When in the standby state, the negative film 1
2 starts the conveyance, and on the basis of the detection of the perforation 14, the conveyance roller 52 performs the intermittent conveyance (the forward path), and the reading head 58 reads the magnetic information recorded on the magnetic track 16 corresponding to the image frame 12A. Is done.

Image frame 12A from which magnetic information is read
Is positioned in the opening 50 of the negative carrier 48 to perform photometry. Appropriate exposure of the image on the image frame 12A is performed by the exposure calculation unit 33 and the image processing unit 39 via the exposure calculation sensor 32 and the video sensor 38 arranged on the optical axis L of the light source 22 for photometry. The exposure correction value is calculated so that

When the photometry for all the image frames 12A for one case is completed, the exposure correction value is determined based on the read magnetic information and the result of the photometry. When the exposure correction values are determined for all the negative films 12 in one roll of negative film 12 for each case, the reversal of the conveying direction is instructed, and the negative film 12 conveys the conveying path 56 of the negative carrier 48.
The upper head is conveyed at a constant speed (return path), and the recording head 60 outputs the exposure correction value corresponding to each image frame 12A to the magnetic head 16.
Recorded in.

Next, the rotation control of the supply reel 44 will be described with reference to FIG. When the roll-shaped negative film 12 is loaded on the supply reel 44 in step 200, the rotation speed of the supply reel 44 is started to be measured by the sensor 100 in step 202.

When the measurement of the number of rotations of the supply reel 44 is started, in step 204, the leading end portion of the negative film 12 is pulled out and nipped by the hold roller 84 and the drive roller 86 to be in a transportable state.

When the drawing of the negative film 12 is completed,
In step 206, a certain amount of conveyance is instructed.
Since the negative film 12 has just been loaded, the negative film 12 is transported by a predetermined initial transport amount at the time of loading.

When the conveyance of the negative film 12 by a predetermined amount is instructed, the number of rotations of the supply reel 44 when the negative film 12 is conveyed by a predetermined amount is measured based on the detection of the slit 96 by the sensor 100.

When the number of rotations of the supply reel 44 is measured,
In step 210, an operation for calculating the outer diameter initial value of the negative film 12 is performed according to a predetermined calculation formula (formula (1) and formula (2) described above) based on the measured number of revolutions. At 212, an outer diameter initial value is determined.

When the initial value of the outer diameter of the roll-shaped negative film 12 loaded on the supply reel 44 is determined, in step 214, the outer diameter determined from the initial rotation speed map corresponding to the outer diameter stored in advance. The initial rotation speed of the supply reel 44 corresponding to the diameter initial value is determined. When correcting the rotation speed in stages, the initial rotation speed is set faster than the rotation speed in the case of the actual outer diameter initial value, so that the rotation speed can be corrected stepwise as the outer diameter decreases. Has become.

When the initial rotation speed of the supply reel 44 is determined, in step 216, it is instructed to convey the negative film 12 at the determined rotation speed.

When the negative film 12 is instructed to be sent out by an appropriate carry amount, in step 218,
It is determined whether the outer diameter (roll diameter) has decreased by a predetermined amount. When the amount of the negative film 12 wound around the supply reel 44 decreases as the process progresses, the initial rotation speed is slow to maintain a sufficient linear velocity, so the rotation speed is increased according to the outer diameter. Therefore, a predetermined amount of reduction of the negative film 12 for correcting the rotation speed is set in advance, and the number of rotations is corrected using this as an index.

The affirmative determination is made that the predetermined amount of decrease is recognized, and in step 220, the rotation speed of the supply reel 44 is read from the map along with the decrease amount. Since the initial value of the outer diameter is set, the rotation speed for maintaining the appropriate linear velocity from the reduction amount can be easily obtained from the map created based on the predetermined formula.

When the reading of the proper rotation speed is performed,
In step 222, the supply reel 44 is instructed to rotate at the read rotation speed, and the routine ends.

As a result, even if the negative film 12 having any outer diameter is loaded on the supply reel 44, an appropriate initial rotation speed can be set and the film can be sent out at an appropriate linear speed. Even if the outer diameter of the loaded negative film 12 changes due to the photometric processing, the correct linear velocity can be maintained by correcting the rotation speed.

Further, the rotation direction of the supply reel 44 can be confirmed by counting the number of pulses by the sensor 100, and the mistake of loading the negative film 12 can be prevented.

Further, the drive roller 8 is maintained while maintaining an appropriate linear velocity.
6 can be adjusted, so that the reservoir 70
The amount of movement of the reservoir roller 68A that forms the roller can be extremely reduced. Further, in the past, when fixing at a constant rotation speed, the rotation speed was determined according to the peripheral speed of the minimum outer diameter, so at the maximum outer diameter, more peripheral speed and torque than necessary are required. However, since the peripheral speed is changed according to the outer diameter, it is not necessary to rotate the supply reel 44 fast from the beginning. Therefore, the drive system such as the motor can be downsized.

Although the slit plate 94 is used as the rotation detecting means in this embodiment, it may be magnetically detected using a hall element. Further, a detectable mark may be attached to a part of the shaft 44A, and the number of rotations may be detected by detecting the mark.

In the present embodiment, the predetermined value for correction is set based on the amount of decrease in the outer diameter, and the rotational speed is corrected using this as an index, but the present invention is not limited to this. For example, the rotation speed can be corrected at a predetermined time interval based on the transportation time. In this case, it is known in advance that the amount of the negative film 12 loaded on the supply reel 44 changes with the progress of processing, and therefore it is preferable to determine the time interval based on this. For example, when the photometric processing has proceeded beyond the time interval determined immediately after loading, the time interval can be reduced accordingly.
Also, instead of the amount of decrease, the outer diameter may be measured to obtain an appropriate rotation speed. In this case, a more accurate proper rotation speed can be obtained. Further, the rotation speed may be corrected each time a change in the outer diameter is always confirmed. In this case, the proper rotation speed can always be maintained.

Further, in the present embodiment, the transport amount of the negative film 12 is measured by the drive roller 86 arranged to pull out the leading end of the negative film 12 loaded on the supply reel 44 and supply it to the supply path 88. However, it is not limited to the drive roller 86. For example, the conveyance amount may be measured by another fixed roller 66 between the supply reel 44 and the negative carrier 48.

In the present embodiment, the scanner 10 is described as an example for photometrically reading the image recorded on the image frame 12A on the negative film 12, but the present invention is not limited to this, and the roll is wound around a reel. The present invention can be applied to a device for supplying a film, for example, a printer.

[0077]

As described above, according to the present invention, the roll-shaped film can be simply and properly supplied according to the outer diameter.

[Brief description of drawings]

FIG. 1 is a schematic overall view of a scanner according to the present embodiment.

FIG. 2 is a schematic configuration diagram of a scanner according to the present embodiment.

FIG. 3 is a plan view of a negative film applicable to the present invention.

4A is a plan view of the periphery of a negative carrier transport path, and FIG. 4B is a cross-sectional view of the negative carrier transport path periphery.

FIG. 5 is a schematic front view of the periphery of the supply reel according to the present embodiment.

FIG. 6 is an exploded perspective view of the measuring unit according to the present embodiment.

FIG. 7A is a diagram showing a pulse signal accompanying the rotation of the supply reel, and FIG. 7B is a graph showing the relationship between the rotation number of the supply reel and the outer diameter.

FIG. 8 is a flowchart illustrating linear velocity maintenance according to the present embodiment.

[Explanation of symbols]

10 scanner 12 Negative film (rolled film) 44 Supply reel (Sending reel) 46 take-up reel 48 negative carriers 80 Hold part (loading means) 92 Measuring section 96 slits 100 sensor (rotation speed detection means) 110 Drive control unit 112 Outer Diameter Measuring Section (Outer Diameter Calculation Means) 114 supply reel drive control unit (control means)

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Claims (2)

(57) [Claims] 1. A film supply device for feeding a roll-shaped film wound around a delivery-side reel to a predetermined transport path, and a loading means for guiding and transporting the outermost layer film at a predetermined transport amount to the predetermined transport path. The number of rotations of the delivery side reel is detected by the number of rotations detecting means, the number of rotations obtained by the number of rotations detecting means, and the loading amount of a constant amount, and the reel is wound around the delivery side reel. Outer diameter calculating means for calculating an outer diameter initial value of the roll-shaped film, reel driving means for rotationally driving the delivery-side reel, and the delivery based on the outer diameter initial value computed by the outer diameter computing means. The initial rotation speed of the side reel is set, and at the same time as the outer diameter of the roll-shaped film is reduced from the initial value, the delivery side reel is set at a predetermined rate. And control means for increasing the rolling speed, the film feeding device having a. 2. A film supply method for feeding a roll-shaped film wound around a delivery-side reel to a predetermined transport path, wherein the outermost layer of the roll-shaped film is pulled out by a constant transport amount and loaded into the predetermined transport path. Then, the number of rotations of the delivery-side reel rotated by the drawer during the loading is detected, and the outer diameter initial value of the roll-shaped film loaded on the delivery-side reel is detected based on the detected number of rotations and the certain transport amount. Based on the outer diameter initial value, the initial rotation speed of the delivery side reel is set, and according to the decrease from the outer diameter initial value,
A film supply method, wherein the rotation speed of the delivery-side reel is increased at a predetermined rate.