JPH02201344A - Tip sending-out device for roll film - Google Patents

Abstract

PURPOSE:To securely feed the tips of plural kinds of roll films which differ in winding diameter and to suppress the occurrence of the misfeeding of a film by allowing the film tip to reach a specific position within a specific corresponding time even if the winding diameter of the roll film varies. CONSTITUTION:When the tip of the roll film F is sent out of a supply reel 26 supported rotatably in a cartridge 27 through an opening part 82, detecting means SW2 and SW3 detect the winding diameter of the roll film F. The film is sent out at a constant speed by a driving means M3 and the time from the start of the sending-out operation to the point of time when the tip of the film F reaches a misfeeding detecting means 32 which detects the detected winding diameter. Therefore, even when films F which have plural kinds of winding diameters are loaded, the tips of the films F reach the specific position within the set time. Consequently, the possibility of the misfeeding, i.e. misconveyance of the film due to the difference in the winding diameter of the film is eliminat ed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a reader that projects an image recorded on a roll of microfilm onto a screen, and a copying machine that prints the image in addition to the screen. The present invention relates to a roll film leading edge feeding device used in a reader printer.

Conventional technology A reader is used to project images recorded on microfilm onto a screen to read out and search the images. A reader printer with a built-in copying machine will be used.

In such a reader or reader printer, a roll film of a type in which a strip-shaped film is wound into a roll may be used as the microfilm.

In this case, the roll film is usually wound around a supply reel, and the cartridge with this attached is loaded into a reel doubler, etc., and the film fed out from the supply reel is wound onto a take-up reel. At the same time, any image recorded on the film can be searched for or read out.

Problems to be Solved by the Invention In conventional reader printers, etc., it is assumed that the supply reel to be loaded is one in which the minimum winding diameter of the roll film is a predetermined value. . For example, a microfilm with a thickness of 5 ill (1 ml = 1/1000 inch) and a length of 25 feet is the smallest roll diameter available. The leading end of the film is reliably delivered to the wound supply reel. To send out this tip,
Conventionally, a feeding device is used that has a reciprocating member equipped with a roller that presses against the outer circumferential surface of the roll film. It is determined whether or not the film has been reliably advanced.

Therefore, even for fairly small diameter roll films,
In order to make it possible to feed the film, it is necessary to set the reciprocating stroke of the feeding device to be large, and as it is unavoidable to increase the size of parts such as the solenoid for operating this, it is necessary to downsize the entire device. In order to achieve this, it is necessary to set the winding diameter of the roll film that can be fed out to a predetermined value or more. For this reason, conventionally, when a roll film with a standard minimum roll diameter or less is loaded, the reader printer etc. determines that a trouble has occurred, even though there is no trouble or failure in the feeding device itself. This was then displayed to the operator using an LED.

Furthermore, conventionally, it is assumed that microfilms with diameters within a predetermined range are loaded, but even within the range of the reciprocating stroke, microfilms with different diameters may be loaded. May be loaded. In conventional film feeding devices, if the leading edge of the film is not conveyed to a reference position within a predetermined time from the start of feeding, it is determined that this is a feed error.

However, if the winding diameter is smaller than the standard standard winding diameter,
There are cases where the leading edge of the film is not conveyed to the reference position within a predetermined time, and in that case, there is a possibility that a misfeed may be determined even though there is no need to consider it as a misfeed. Furthermore, if the winding diameter is larger than the regular winding diameter, the film may be fed in and the film may be damaged. For this reason, in the past, image retrieval operations using microfilm were sometimes not carried out smoothly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the operability of a reader and a reader printer by preventing misfeed from occurring even if the diameters of loaded microfilms are different.

Means for Solving the Problems In order to achieve the above object, the present invention provides a supply reel with a film wound thereon, from a cartridge that rotatably supports a supply reel, through an opening formed in the cartridge, to a leading end of the film. A roll film leading edge feeding device configured to feed out the leading edge of the film to the outside, comprising a winding diameter detecting means for detecting a winding diameter of the roll film wound around the supply reel; a drive means for driving; a misfeed detection means for detecting whether or not the leading end of the film has reached a predetermined position within a predetermined time; This is a roll film leading end feeding device characterized by comprising a control means for changing time.

Function: In the roll film leading end feeding device of the present invention, when the leading end of the roll film is fed out through the opening from the supply reel rotatably supported in the cartridge, the winding diameter of the roll film is determined by the detection means. is detected.

The film is fed out at a constant speed by the driving means, but the time required for the leading edge of the film to reach the misfeed detection means that detects the completion of feeding from the start of feeding is determined according to the detected winding diameter. It's changing. Therefore, even if films with a plurality of different diameters are loaded, the leading edge of the film will reach the predetermined position within the set time. This eliminates the possibility of film misfeed, that is, incorrect conveyance, due to differences in film winding diameters.

EXAMPLES Hereinafter, the present invention will be explained in detail based on the illustrated examples.

FIG. 7 is a diagram showing an example of a reader printer incorporating the roll film leading end feeding device of the present invention, in which an image projection unit 12 having a screen 11 is attached on the reader printer main body 10, and A work table 13 is attached to the front of this reader printer main body 10.

A roll film transport unit 14 that transports a roll of microfilm is detachably installed between the reader printer main body 10 and the image projection unit 12, and the image recorded on this film is transferred to the screen 11. will be projected on. In order to make a hard copy of the image recorded on this film, a known copying device is built into the reader printer main body 10, and two paper feed cassettes 15. 16
is detachable from the reader printer main body 10. After copying is completed, the copy paper is discharged from a discharge port 17 formed in the work table 13.

The roll film transport unit 14 shown in FIG. 7 is shown in FIG. 22 and a connecting member 23 that connects these parts, and an operation board 25 is connected to this conveying part 14 via a cable 24.

FIG. 9 shows the internal structure of the roll film transport section 14 and the schematic structure of the projection optical system within the reader printer main body 10. As shown in the figure, a large number of images are recorded on a strip-shaped microfilm, that is, a roll film F, at predetermined intervals, and this roll film F is wound around a supply reel 26 in a roll shape. This supply reel 26 is rotatably supported by a cartridge 27 in a detachable manner, and the roll film F fed out from the supply reel 26 in this cartridge 27 is transferred to a winding device provided in the winding section 22. It is adapted to be wound up on a roll 28.

The supply reel 26 is connected to the film F by a drive shaft 29.
When the cartridge 27 is loaded into the cartridge insertion opening 20, this drive shaft 29 rotates forward and backward in the direction of feeding out and the direction of winding up the cartridge.
7, the switch SW1 is actuated, and a solenoid (not shown) causes the supply reel to move forward toward the core within the supply reel 26. Further, the drive shaft 29 is rotatably driven in both forward and reverse directions by the motor M1 as described above. The winding wheel 28 is rotatably driven by another motor M2 connected to a drive shaft 28a integrated therewith.

Inside the cartridge storage section 21, there is a winding reel 28 for taking up the microfilm F fed out from the cartridge 27.
In order to transport the microfilm F, it has a drive roller 30 driven by a motor M3 and an auxiliary roller 31 in pressure contact with the drive roller 30, and an encoder 32 for counting the transport distance of the microfilm F. It has an auxiliary roller 33 that presses against it. Further, a guide roller 34 is provided within the winding section 22 and is positioned at the same level as the encoder 32. The roll film F fed out from the cartridge 27 is taken up on a reel 28.
A plurality of guides 35 are provided between these guides 35 to guide the film, and these guides 35 form a film transport path 36.

As shown in FIG. 9, light from a light source such as a lamp 40 is
After the light is focused by the condenser lens group 42 via the reflection mirror 41, it is irradiated onto the microfilm F located between the upper and lower pressure-bonded glass plates 43 and 44, and the image recorded on the microfilm F is thereby transmitted to the projection lens. 45 and projected onto the screen 11 as an image receptor.

In order to search for a predetermined image projected on the screen 11, the operator operates keys on the operation board 25. When projecting an image, the lower pressure bonding glass plate 44 is pressed against the upper pressure bonding glass 43 via the roll film F.
The four plates can be moved up and down.

FIGS. 1 to 3 are diagrams showing an embodiment of a roll film leading end feeding device incorporated in the above-mentioned reader printer. Incidentally, in these figures, the portion of the roll film F is shown except for the supply reel 26 shown in FIG. 9.

As shown in FIG. 1, a support pin 50 is rotatably mounted in the cartridge storage portion 21 shown in FIG.
1 is fixed, and this arm 51 is attached to a support pin 50.
The support pin 50 can swing freely around the axis of the support pin 50.

The base end of the arm 51 has a stepped portion 52, as shown in FIG. 3, in order to avoid interference between the arm 51 and the cartridge 27 loaded in the cartridge insertion port 20. In order to swing the arm 51, an operating rod 53 of a solenoid SLI installed in the cartridge housing 21 is connected to the arm 51. When the solenoid SL1 is operated, the arm 51 swings as shown in FIG. As shown in FIG. 1, the solenoid SL1 is swung to the initial position and then the solenoid SL1 is de-energized, thereby returning to the initial position. This return is due to arm 51
This is achieved by the elastic force of the spring member 54 attached to the arm 51, and the stopper 55 comes into contact with the arm 51 in the return position.

A support pin 56 is provided at the tip of the arm 51 and protrudes toward the rear side in FIGS. 1 and 2, and a tightening roller 57 is rotatably mounted on the support pin 56. Furthermore, at the tip of the arm 51, there are marks shown in FIGS. 1 and 2.
As shown in the figure, an L-shaped support plate 58 is rotatably mounted around a support pin 59 fixed to the tip. The base end of the support plate 58 is provided with an engagement part 60 that is bent in a direction perpendicular to the drawing and engages with the side surface of the arm 51. Rotation is restricted.

A support pin 61 protruding toward the front side in the figure is provided at the tip of the support plate 58, and a peeling roller 62 is rotatably attached to the support pin 61. The peeling roller 62 is made of, for example, hard rubber or plastic, and has support pins 6 on its surface as shown in the figure.
A large number of sawtooth grooves are formed along a direction parallel to the axial direction of the first part.

In the illustrated embodiment, the tightening roller 57 and the peeling roller 62 are set to have substantially the same outer diameter, and the arm 5
1 has returned to its original state as shown in FIG. It is located off to the left in the figure.

As shown in FIG. 2, when the arm 51 is swung, the tightening roller 57 and the peeling roller 62 come into contact with the outer peripheral surface of the roll film F, respectively. At this time, the support plate 58 of the peeling roller 62 rotates clockwise around the support pin 59. Arm 51
As shown in FIG. 1, when the support plate 58 is in the return position, the support pin 5 is
A torsion coil spring 63 is attached to 9, and this spring 63
One end is fixed to a locking hole 64 formed in the arm 51, and the other end is fixed to a stopper 65 fixed to the support plate 58.
is engaged in. With this torsion coil spring 63,
The support plate 58 is constantly biased with a counterclockwise resilient force, that is, a spring force, centered around the support pin 59.

In order to drive the tightening roller 57 and the peeling roller 62 in synchronization with the drive roller 30 by the motor M3 shown in FIG. , a pulley 68 rotatably attached to a pin 67 fixed to the center of the arm 51, and a pulley portion 62a integrally formed with the peeling roller 62.
An endless belt 70 is wrapped around the. Furthermore, a driving pulley 72 is fixed to an interlocking shaft 71 rotatably attached to the arm 51, and a driving pulley 72 is fixed to the front side of the arm 51, while a driven pulley 73 is fixed to the linking shaft 71, which is located on the back side of the arm 51. The belt 70 is suspended on the drive pulley 72. Driven pulley 73
The endless belt 74 is wound around a part of a pulley 57a formed integrally with the tightening roller 57.

As shown in the figure, the belt 70 is suspended from the pulley 68 and the driving pulley 72 so as to intersect with each other, so that when the driving roller 30 is rotated in the direction of the arrow in FIG. rotates in the same direction as the drive roller 30, as shown by the arrow, whereas the tightening roller 57 rotates in the opposite direction, as shown by the arrow.

When the posture of the arm 51 is changed between the position shown in FIG. 1 and the position shown in FIG. 2, the pulley 68 and the pulley part 6
2a and a pulley part 30 integrated with the drive roller 30
Although the relative position with respect to a will change, the position of each pulley and a part of the pulley is set so that the overall length of the belt 70 does not change much during this posture change process.

FIG. 4 is a diagram showing the lower half of the cartridge 27. The cartridge 27 is made of a flexible material such as resin, and a guide surface 80 that contacts the circular end plate of the supply linyl 26 is a diagram showing the lower half of the cartridge 27. The front and rear are each shaped like an arc. Each guide surface 80 has a tapered shape in the radial direction, and a cylindrical inner surface 81 is formed at the intermediate portion of each guide surface 80 . Also, cartridge 2
7, as shown in FIGS. 1 and 2, an opening 82 is formed in a portion that will be on the distal end side when inserted into the cartridge insertion port 20.

Since the opening 82 is formed in this manner, the film F is fed out through the opening 82, and the operation of mounting a predetermined supply tube 26 on the cartridge 27 is facilitated. There is.

Furthermore, as shown in FIG. 4, this cartridge 27 has a notch (space) 83 formed in its lower portion that communicates with the distal end side of the cartridge 27. This notch 83 is provided with a positioning member to prevent the cartridge 27 from erroneously inserting the cartridge 27 in a predetermined direction when the cartridge 27 with a predetermined supply reel 26 is loaded into the cartridge storage portion 21. is now inserted.

FIG. 5 is a diagram showing a positioning member inserted into the notch 83. The positioning member inserted into the notch 83 has an L-shape and a width slightly smaller than the width of the notch 83. A narrowed positioning plate 85 is fixed. Attached to the rising portion of the positioning plate 85 is one end portion of a metal leaf spring 86 which is curved into an arc shape with a predetermined curvature so that the lower side thereof is convex.

This leaf spring 86 is adapted to be displaced between a position shown by a solid line and a position shown by a broken line in FIG. This is because when the length of the roll film F wound around the supply reel 26, that is, the winding diameter of the roll film F, is smaller than a predetermined diameter, the outer peripheral surface of the roll film F and the inner peripheral surface of the cartridge 27 are The gap between the cartridges 27 and 27 has a supply reel 26 whose winding diameter is smaller than a predetermined value.
This is provided to reduce this gap when the machine is loaded. FIG. 6 shows a state in which when a cartridge 26 having a roll film F with a small diameter is loaded, the leaf spring 86 is displaced and the gap between it and the outer peripheral surface of the roll film F becomes smaller.

In this way, in order to displace the leaf spring 86, the lever 8 is rotated freely around the pin 87, as shown in FIG.
8 is attached so that the tip of the lever 88 comes into contact with the leaf spring 86, and a link 89 operated by the solenoid SL2 is connected to the rear end of the lever 88.

A cam 90 is attached to the support bin 50 in order to detect the rotational position of the arm 51 shown in FIGS. 1-3. This cam 90 and the two switches SW2 and SW3 operated by it are shown in FIG. 10.

As shown in the figure, the cam 90 has two operating protrusions 90a and 90b each having an arcuate outer circumferential surface, and these are out of phase with respect to the center of the support bin 50 in its rotational direction. ing. One of the operating protrusions 90a is a second actuating projection 90a.
As shown in the figure, when the cartridge 26 of the supply reel 26 having the regular maximum winding diameter is loaded, the arm 51 reaches the position where the tightening roller 57 and the peeling roller 62 contact the outer peripheral surface of the roll film F. Even if the solenoid SL2 rotates, the switch SW2 does not operate, and if a smaller regular winding diameter is loaded, the solenoid SL2
This is for operating the switch SW2 to drive the switch SW2. The other operating protrusion 90b is provided with a switch to notify the operator that the loaded film is unusable when the roll diameter of the roll film is so small that image retrieval is not possible. SW3
It is for operating the.

In this way, when the outer diameter of the loaded roll film F is so small that it cannot be used, as shown in FIG. lights up. Further, the operation board 25 is provided with a misfeed display section 94 including an LED or the like, and when the roll film F is jammed in the conveyance path 36, this display section 94 lights up. Furthermore, the operation board 2
5 is attached with a rewind switch 95 that is operated when rewinding the film F, and a dial 96 for transporting the film F in forward and reverse directions.

As shown in FIGS. 1 to 3, in the roll film leading end feeding device of the present invention, the tightening roller 57 and the peeling roller 62 are moved around the outer periphery of the roll-shaped film F by the operation of the solenoid SLI. When the arm 51 swings counterclockwise in the figure until it comes into contact with the surface, if the roll-shaped film F has the normal maximum winding diameter, the protrusion 90a will move as shown in FIG. This is detected by not turning on switch SW2. Furthermore, if the diameter is too small to be usable, this is detected by the swinging of the arm 51 causing the protrusion 90b to turn on the switch SW3.

The behavior of the leading edge of the film when feeding out the leading edge of the film F when the cartridge 27 is loaded with the microfilm F whose diameter is not so small as to be unusable, but which is smaller than the normal maximum roll diameter, is determined as follows. FIG. 11 shows a comparison with the case of a winding diameter of . The outer periphery of the normal winding diameter is indicated by the symbol Fa, and the small diameter winding diameter is indicated by the symbol Fb. When these are rotated in the feeding direction shown by arrow W, if both are rotated at the same rotation speed, the normal winding diameter F
In the case of a, the reference position A is reached in a predetermined time, whereas in the case of the small diameter Fb, for example, the distance B is longer than that.
Therefore, it will be sent out only to a smaller number of positions. As in the conventional example, if the leading edge of the film does not reach the reference position A even after a predetermined period of time has passed since the film was fed out, it is determined that the film has misfeed. The reference position A is the position of the encoder roller 32 in the illustrated case, and when the leading edge of the film F reaches the position of the encoder roller 32, the encoder 3
2 is activated, the tip position is detected.

Therefore, in the roll film leading end feeding device of the present invention, even when a roll film F having a winding diameter of the small diameter Fb is used, if the diameter is not very small, the image can be read out. ing. Therefore, the time required to reach the reference position is made different depending on whether the winding diameter is large or small. In this way, even if a roll film F having a roll diameter Fb smaller than the regular maximum roll diameter Fa is loaded, it is possible to send it out and reliably search for its image.

However, even if a roll film with a smaller diameter than this winding diameter Fb is loaded, if it is fed out, the swing stroke of the arm 51 must be set large, and each 11 -7 component parts, such as the solenoid SLI, are forced to be larger, so if a roll film F whose diameter is much smaller than the roll diameter Fb is loaded compared to the standard roll diameter of the standard product, when it is fed out, In addition, as described above, the operator is informed that an unusable roll film F has been loaded, rather than a misfeed or incorrect conveyance of the film in the apparatus.

FIG. 12 is a block diagram showing the control circuit of the present invention,
A signal is sent to the microcomputer CPU97 from the encoder 32a operated by the encoder roller 32, and from this CPU97, the signal is sent to the unusable display section 93, the misfeed display section 94, and the three motors M1 to M3. , and two solenoids SLI, SL
An activation signal is sent to 2. Further, each of the aforementioned switches SW1 to SW3 is connected to the CPU 97.

Next, the operating procedure of the distal end feeding device of the present invention will be explained with reference to the flowchart shown in FIG.

FIG. 13 is a diagram showing the routine of the film feeding program. When the cartridge 27 with the supply reel 26 attached is loaded into the cartridge insertion port 20 of the reader printer shown in FIG. The switch SWI shown in FIG. 2 is turned on. When the switch 100 detects that this switch is turned on, the drive shaft 29 advances into the core portion of the supply tube 26, and after these are in a fitted state, the film is tightened as shown in step 101. The subroutine is executed. In this step, the supply reel 26 is rotated at high speed for a predetermined period of time by the motor M1 in the counterclockwise direction indicated by the arrow Wa in FIG. This results in
The slack of the film F on the supply reel 26 is removed,
Preparations for feeding out the leading edge of the film are completed.

Next, in step 102, the solenoid SL1 is driven to swing the arm 51 in the counterclockwise direction as shown in FIG. .

At this time, as is clear from the comparison between FIG. 1 and FIG. 2, the support plate 58 rotates clockwise around the five support pins, and the peeling roller 62 shifts to the right. Become. In this state, when the supply reel 26 is rotated at a low speed in the direction of the arrow Wa, the film F, which has been tightened to some extent by the high speed tightening, is further tightened around the reel 26.

As described above, when the arm 51 swings to the position shown in FIG. 2, the winding diameter of the roll film F in the loaded cartridge 27 becomes the normal maximum winding diameter as shown in FIG. If so, the protrusion 90a of the cam 90 attached to the support bin 50 has not rotated to the position where the switch SW2 is turned on, so the determination in step 103 is NO. Next, the feeding of the film is started, but in this invention, the time during which the motor M1 for rotating the supply reel 26 in the direction of the arrow W in FIG. 2 continues to rotate is varied. In step 104, the time Z required for the roll film F with a large diameter to reach the position of the encoder roller 32 from the start of feeding is determined.
Set 1. During this feeding, as shown in FIG. 2, the peeling roller 61 rotates in the opposite direction to the tightening roller 57 and guides the leading end of the film F toward the conveyance path 36.

In step 105, a timer is started to count until the set time Z1 from the start of feeding until the leading edge of the film reaches the encoder roller 32 is reached, and in step 106, the motor M1 is turned on.

As a result, the motor M1 feeds and rotates the supply reel 26 in the direction of arrow W in FIG. Set time Z1
If it is determined in step 107 that the leading edge of the film has reached the encoder roller 32, step 1
08, the drive of the motor M1 is stopped in step 109, and the arm 51 is returned to the return position shown in FIG. 1 in step 110. As a result, the pressure contact between the tightening roller 57 and the peeling roller 62 against the surface of the roll film is released. Conveyance of the film from the encoder roller 33 to the take-up reel 28 is performed by a drive roller 30 driven by a motor M3.

If it is determined in step 111 that the encoder roller 32 does not operate within the set time Zl, this means that the film has been erroneously conveyed even if the film has a normal roll diameter. , the misfeed display section 94 is turned on in step 112.

If the diameter of the film wound around the supply reel 26 is smaller than the above-mentioned large diameter, the arm 51
rotates to the pressure contact position, and the switch SW2 connects to the protrusion 90a.
The switch is turned on, and the determination in step 103 is YES, and then the determination in step 113 is NO. If the winding diameter is small, the gap between the outer circumferential surface of the roll film F and the inner circumferential surface of the cartridge 27 will be larger than in the case of the standard winding diameter. , solenoid S shown in FIG.
L2 is turned on. In this state, the position spring 86 is
It is displaced to the position shown in the figure to prevent the film F from loosening.

Next, in step 115, the small diameter roll film F
The time required for the leading edge of the film to reach the encoder roller 32 is set to 22 from the start of feeding. Next, in the step 105, the timer T starts counting up the Z2, and at the same time, the motor M1 starts to be driven at a constant speed similar to the case of a large winding diameter.

If a small diameter film is loaded, the solenoid SL2 is turned on in step 114, so it is turned off in step 108.

If YES is determined in step 113, the loaded film has a roll diameter smaller than the small diameter film, which means that an unusable film has been loaded. In this case, the unusable display section 93 is turned on in step 116.

In this way, in the case shown in the figure, if the cartridge 27 that handles a roll fill with a fairly small diameter smaller than a predetermined winding diameter is loaded, the take-up reel 2
The film cannot be conveyed up to 8, but this is not because the reader printer has caused a misfeed, but because the loaded film has become unusable in diameter. Therefore, in this case, the unusable state is indicated to the operator by lighting up the unusable display section 93 consisting of an LED.

In the illustrated embodiment, if the usable winding diameter is either a large winding diameter or a smaller winding diameter as shown in FIG. 1, there is a certain tolerance for each winding diameter. However, the film can be fed out by changing the time from the start of feeding until it reaches the encoder roller 32, and there are two types of film diameters. However, it may be set to a higher value than this.

Moreover, instead of the swinging arm 51, a moving member that reciprocates in the axial direction may be used as long as it has a roller that forms a contact portion.

Effects of the Invention As described above, according to the present invention, the detection means for detecting the winding diameter of the roll fill wound around the supply reel is used, and the leading edge of the film reaches the misfeed detection means according to the winding diameter. By varying the time, the leading edge of the film is made to reach a predetermined position within a predetermined amount of time even if the winding diameter changes, so the leading edge of multiple types of roll films with different winding diameters can be reliably fed. As a result, the occurrence of film misfeed can be suppressed.

This has greatly improved the operability of reader printers and the like.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing the return state of a roll film leading end feeding device according to an embodiment of the present invention; FIG. 2 is a schematic front view showing the device shown in FIG. 1 at the start of feeding; 3 is an exploded perspective view showing the components shown in FIGS. 1 and 2, FIG. 4 is a perspective view showing the lower half of the cartridge, FIG. 5 is a front view showing the positioning member of the cartridge, and FIG. The figure is a schematic front view showing a cartridge loaded with a small diameter roll film, FIG. 7 is a perspective view showing a reader printer incorporating the roll film leading end feeding device of the present invention, and FIG. FIG. 9 is a schematic sectional view showing the transport path from the supply reel to the take-up reel and the projection optical system, and FIG. 10 is a perspective view showing the cam and switch shown in FIGS. 1 to 3. FIG. 11 is a schematic diagram showing the state of movement of the leading edge of the film during feeding depending on the size of the winding diameter. FIG. 12 is a block diagram showing a control circuit for controlling the operation of the leading edge feeding device of the present invention. FIG. 13 is a flowchart showing the operating procedure of the apparatus of the present invention. 20...Cartridge insertion slot, 25...Operation board, 26...Supply reel, 27...Take-up reel, 2
9... Drive shaft, 32... Encoder (misfeed detection means), 51... Arm (moving member), 56...
- Support pin, 57... Sealing roller, 62... Peeling roller, 82... Opening, 90... Cam, 93...
・Unusable display section, 94... Misfeed display section, M
3...Motor (drive means), SLI, SL2...Solenoid, SW2, SW3...Switch (winding diameter detection means), 97...CPU (control means). Patent applicant Minolta Camera Co., Ltd. Agent Patent attorney 8 1H Mikio (1 idiot) Figure 4 R1 Figure 1O Figure 11

Claims (1)

[Claims] A leading end feeder of a roll film, wherein the leading end of the film is fed out from a cartridge rotatably supporting a supply reel wound with the film through an opening formed in the cartridge. In the apparatus, a winding diameter detecting means for detecting a winding diameter of a roll film wound around the supply reel, a driving means for rotationally driving the supply reel when feeding out the leading end of the film, and a driving means for rotating the supply reel when the leading end of the film is fed out at a predetermined position. misfeed detection means for detecting whether or not a predetermined position has been reached within a time of , and a control means for changing the predetermined time according to the winding diameter detected by the detection means. Roll film tip feeding device.