JPH0649568Y2 - Sheet film feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention takes out rectangular sheet films such as medical X-ray photographs and tomographic photographs one by one from a storage container and supplies them to a photographing device, a developing device and the like. And a sheet film feeding device for the same.

(Prior Art) Conventionally, since this type of sheet film feeding device is housed in a sealed box and operates in a light-shielded state, even if a double sheet occurs, the film cannot be taken out and processed. It was a structure. However, the sheet film is easily charged with static electricity, and it has been a difficult problem to prevent double feed.

In order to solve this problem, the applicant of the present application has already proposed the sheet film feeding device disclosed in Japanese Patent Laid-Open No. 62-51526. This already proposed device is a magazine with an upper opening for accommodating rectangular sheet films in a laminated form,
Adsorption means for adsorbing the upper surface of the front portion of the film in the magazine, swinging means for moving the adsorption means up and down and back and forth, and feeding the front end edge of the film adsorbed and lifted by the adsorption means to the front. It is equipped with a feeding roller for feeding, and when there are two or more films that have been fed into the feeding roller, the feeding roller is rotated in the reverse direction, the film is returned to the original magazine, and the film is fed again to the feeding roller by the suction means. However, the operation of taking out and returning is repeated until the double feed is eliminated.

By the way, in the automatic developing machine of the film and the photographing machine,
Each of them is provided with a sheet film take-in roller, and is adapted to take in the sheet film fed from the sheet film feeding device.However, it is possible to synchronize the feeding speed of the sheet film taking-in roller and the feeding roller of the sheet film feeding device. It's extremely difficult.

In order to solve such a problem, a one-way transmission system is adopted for the feed roller of the sheet film feeding device, and the conveyance speed of the sheet film taking-in roller of the developing machine is set a little higher so that the taking-in roller of the sheet film is After feeding, the feed roller can be made to idle. However, if a one-way transmission system such as a one-way clutch is incorporated in the feed roller or the like, the feed roller cannot be reversed.

Therefore, the applicant of the present application has already proposed a sheet film feeding device in which a feed roller uses a forward rotation gear and a reverse rotation gear having a different number of gears, and incorporates a drive device using a rotary solenoid as a forward / reverse switching means. .

(Problems to be Solved by the Invention) However, the drive device that switches using the forward and reverse rotation gears described above has a problem that the mechanism is complicated and very expensive, and assembly and adjustment are difficult.

The present invention has been made in view of the above situation, and a transmission body is provided on an output shaft driven by a motor via a forward rotation one-way clutch, and the forward rotation power is transmitted to the feed roller via the transmission body. In addition, the one-way transmission mechanism that transmits the reverse rotation power by operating when the output shaft rotates in the reverse direction is provided between the output shaft and the transmission body. It is an object of the present invention to provide a sheet film feeding device capable of solving the above-mentioned return problem.

(Means for Solving the Problems) The present invention has taken the following technical means in order to solve the above problems.

That is, the feature of the present invention is, firstly, a pair of feed rollers 38, 39 for feeding the sheet film 8 taken out from the storage container 7 to the take-in roller 65 of the front film processing machine 64, and a pair of feed rollers 38, 39. Double feed detecting means C for detecting that one feed roller 39 is separated from the other feed roller 38 when two or more sheet films 8 are eaten between the feed rollers 38, 39; A feed roller driving means D for rotating the feed roller 39 in the forward and reverse directions.
The transmission shaft 51 driven by the forward / reverse rotation motor 46 is provided with a transmission body 51 via a forward rotation one-way clutch 50, and the transmission power from the transmission body 51 to the one feed roller 39 is lower than that of the intake roller 65. A one-way transmission mechanism for reversing, which operates between the output shaft 47 and the transmission body 51 by the reverse rotation of the output shaft 47 and transmits the reverse rotation to the transmission body 51. Secondly, the reverse rotation unidirectional transmission mechanism 59 is screwed into the threaded portion 54 on the output shaft 47 and is rotated by the reverse rotation of the output shaft 47 so as to approach the transmission body 51. The clutch member 49 which moves in the direction, the engaging claws 56 and 57 formed on the clutch member 49 and the transmission body 51 to be engaged by the proximity of the clutch member 49, and the output shaft reverse rotation start of the clutch member 49 with respect to the output shaft 47 Sometimes, it is set to the rotation-inhibited state once and after engaging with the transmission 51, In that it has a resistor 53 to the rotation allowing state.

(Operation) According to the present invention, the rectangular sheet films 8 are stored in the storage container 7 in a stacked manner with their front edges aligned. The sheet films 8 housed in the container 7 are taken out one by one from the upper part in the following manner. First, the suction means B descends by the swinging means A, and the suction means B contacts the front upper surface of the uppermost sheet film 8 in the storage container 7 and sucks it. Then, the swinging means A raises the suction means B to lift the front portion of the sucked sheet film 8 and supply it to the feed rollers 38, 39 located above. At this time, the feed rollers 38, 39 are normally rotated by the drive means D via the one-way clutch (one-way transmission mechanism) 50 for normal rotation. Feed rollers 38,39
Sucks in the front edge of the lifted sheet film 8, and at the same time, the suction by the suction means B is released, the sheet film 8 is fed forward by the feed rollers 38, 39, and is fed between the take-in rollers 65 of the developing machine or the like. Supplied.
The take-in roller 65 rotates at a slightly higher transport speed than the feed rollers 38 and 39, but
Since 39 is driven via the one-way transmission mechanism 50 for normal rotation, it spins idle and the sheet film 8 is taken up by the take-in roller 65. Therefore, the sheet film 8 is smoothly transferred without being deformed by wrinkles or elongation.

Therefore, two or more films 8 are provided on the feed rollers 38, 39.
, The double feed detecting means C operates, and when the forward / reverse rotation motor 46 rotates in the reverse direction, the reverse rotation unidirectional transmission mechanism 59 operates to transmit the reverse rotation power of the output shaft 47 to the feed roller 39. become. Then, the sheet film 8 which has been slightly advanced by being eaten by the feed rollers 38 and 39.
Is fed backward by the reverse rotation of the feed rollers 38, 39, and the rear edge of the sheet film 8 also moves backward while slidingly contacting the upper surface of the sheet film 8 in the storage container 7. The rear edge of the sheet film 8 being fed back is
When it reaches the original position where it was initially stored, the front edges of the sheet film 8 and the feed rollers 38, 39 are released, and the front portion of the sheet film 8 naturally falls due to its own weight.

At this time, since the rear edge of the sheet film 8 has returned to the original position, the front edge of the sheet film 8 that naturally falls will surely return to the original position and the two sheet films 8 taken out at the same time. Are correctly returned to the storage container 7.

After that, the feed roller driving means D is switched to the normal rotation, the sheet film 8 is taken out again, and the forward / backward movement is repeated until only one sheet is fed into the feed rollers 38, 39.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a sheet film feeding device 1 has a sealed box 2 that completely blocks external light. An opening 3 is provided on the upper surface of the box 2, and the opening 3 is openably and closably closed by a lid 5 connected by a hinge 4. As shown in FIG. 2, a pair of left and right frames 6 are provided inside the box 2, and a storage container 7 is stored between the frames 6 in a front-down inclined shape.

The storage container 7 is formed in a rectangular box shape having an upward opening, and the rectangular sheet films 8 are stored therein in a laminated shape. The sheet film 8 to be stored is made of plastic, and it is not necessary that the sizes thereof are uniform, and the size may be various. In this example, 430m
It is possible to process a film with a size of m square to 254 mm square at the same time. The thickness of the film 8 is about 0.18 mm. In this case, the front end edge and one side edge of each film 8 are accommodated and stored. The storage containers 7 are arranged in a downwardly sloping shape so that the front edge of each film 8 can be easily aligned at a fixed position. The inclination angle of the storage container 7 is 14 ° with respect to the horizontal
Optimally around ~ 15 °.

A pair of left and right swing arms 9 is rotatably supported by the pair of left and right frames 6 (see FIG. 2) via a support shaft 10 which is a rotation fulcrum. The support shaft 10 is attached to the frame 6 so as to be located on the side of the middle portion of the storage container 7 in the front-rear direction. The position of the support shaft 10 is such that the rear end of the film 8 does not move in the front-back direction when the front part of the film 8 in the storage container 7 is lifted up about the support shaft 10 so as to turn the pages of the book. It is set to a proper position.

A connecting rod 12 is attached to the lower part of the swing arm 9 via a pin 11 so as to extend forward, and a front end of the connecting rod 12 is pivotally supported by a crank 14 via a crank pin 13. This crank 14 is a pair of left and right frames 6
It is attached to a crank shaft 15 which is inserted through the crank shaft 15, and the crank shaft 15 is rotated in one direction by a drive motor 16.
A position detecting protrusion 17 is provided on the crank 14. Two photosensors 18 and 19 for detecting the passage of the protrusion 17 and controlling the drive motor 16 are attached to the frame 6. One photo sensor 18 is for temporarily stopping the drive motor 16, and the other photo sensor 19 is for the drive motor 16.
It is to stop 16 completely.

The upper portions of the pair of right and left swing arms 9 are connected by a horizontal rod 20 which is a rotating member, and the horizontal rod 20 is rotatably supported by the swing arm 9. The frame 6 is provided with an opening 21 through which the horizontal rod 20 can be inserted (see FIG. 2). The opening 21 is provided over a range in which the horizontal rod 20 can move with the swing of the swing arm 9. Has been.

The drive motor 16, the crank 14, the connecting rod 12, the swing arm 9, the horizontal rod 20 and the like constitute the swing means A of the present invention.

The horizontal rod 20 is provided with suction means B. As shown in FIG. 2, a plurality of the suction means B are arranged at predetermined intervals along the longitudinal direction of the horizontal rod 20. Further, among the sheet films 8 stored in the storage container 7, the sheet films 8 are arranged so as to be biased to one side so as to be within the widthwise range of the smallest film 8.

The suction means B is mainly composed of a suction cup shaft 22 which is slidably inserted in the horizontal rod 20 in the axial direction, a suction cup 23 fixed to the lower end of the shaft 22, and a space between the suction cup 23 and the horizontal rod 20. The suction cup 23 fitted onto the shaft 22 with
Is composed of a compression coil spring 24 for constantly urging the shaft 22, a stopper nut 25 screwed onto the upper end of the shaft 22, and a valve mechanism (not shown) housed in the suction cup shaft 22.

The upper end surface of the valve shaft 26 of the valve mechanism projects above the upper end surface of the suction cup shaft 22, and the upper end surface of the valve shaft 26 is a valve operating lever.
It is pushed downward by 27. This valve operating lever 27
It is attached to a shaft 29 rotatably supported between a rotation restricting plate 28 fixed to one end of the horizontal rod 20 and a bracket (not shown) fixed to the other end of the horizontal rod 20.

The end of the valve operating lever 27 is removably abutted on a stopper 30 fixed to the frame 6, and the valve operating lever 27 is pushed by the stopper 30 to rotate the valve operating lever 27 around a shaft 29. Then, the valve shaft 26 is pushed.

A tension spring 31 is formed on the upper end of the rotation restricting plate 28 fixed to one end of the horizontal rod 20, and the rear end of the spring 31 is locked to the frame 6. The rotation restricting plate 28
The rear end face of the upper part of the abutting member abuts on a stopper pin 32 protruding from the swing arm 9, and the rearward rotation by the tension spring 31 is restricted.

A pin 33 is projectingly provided on the lower side surface of the rotation restricting plate 28. The pin 33 swings around the support shaft 10 by the swing of the swing arm 9, and a guide plate 34 is provided on the swing locus of the pin 33. One end of the guide plate 34 is rotatably supported by a support shaft 35 projecting from the frame 6 and is biased upward by a spring or the like to contact a stopper pin 36 provided on the frame 6. In contact therewith, its upward rotation is prevented.

Therefore, when the pin 33 of the rotation restricting plate 28 moves downward from above, the guide plate 34 is pushed by the pin 33 and rotates downward,
Further, when the pin 33 moves downward, the guide plate 34 and the pin 33
When the engagement of 33 is released, the guide body 34 rotates upward due to the spring force and contacts the stopper pin 36. When the pin 33 moves from the bottom to the top, the pin 33
Contacts the guide plate 34, but at this time, since the guide body 34 cannot be rotated upward by the stopper pin 36,
The pin 33 moves rearward along the lower surface of the guide plate 34 against the spring 31. By the rearward movement of the pin 33, the swing arm 9 and the horizontal rod 20 relatively rotate, and the suction means B moves rearward. When the pin 33 further moves upward, the pin 33 and the guide plate 34
Is disengaged and the rotation restricting plate 28 is a tension spring.
It is pulled by 31 and returns to its original position.

Thus, the rotation restricting plate 28, the pin 33, the guide plate 34, the tension spring 31 and the like constitute a rotation restricting means.

A restraint means 37 is provided behind the suction cup 23 and above the storage container 7. The restraint means 37 comprises rollers, and both ends of the restraint means 37 are supported by the frame 6. The restraint means 37 comes into contact with the upper surface of the film 8 which is sucked up by the suction cup 23 and lifted up, and regulates the upward movement of the film 8.

The pair of feed rollers 38, 39 are arranged in front of where the suction cup 23 is located when the swing arm 9 is slightly before top dead center. This feed roller 38,39
Is located behind a vertical line passing through the front edge of the film 8 in the storage container 7. To be precise, the support shaft 10 is arranged on the circumference passing through the front end edge of the film 8 in the storage container 7 with the center thereof as the center. In this position, when the front edge of the film 8 is in contact with the feed rollers 38, 39 and the rear portion of the film 8 is in contact with the upper surface of another film in the storage container 7, when the front portion of the film 8 is naturally dropped, This is the position where the film 8 falls correctly to the original position inside the storage container 7.

The lower feed roller 39 is fixedly provided to the frame 6, while the upper feed roller 38 is supported by a bracket 41 which is rotatably supported by the frame 6 via a support shaft 40. The bracket 41 is engaged with a timing detection limit switch 42 and a double feed detection limit switch 43 attached to the frame 6. A pair of left and right brackets 41 are provided, and a pair of left and right limit switches 42 and 43 are also provided.

That is, the film 8 is provided between the pair of feed rollers 38 and 39.
When the feed roller 38 is fed, the feed roller 38 is separated from the feed roller 39, and the bracket 41 is rotated around the support shaft 40 by the thickness of the film 8 by the separation movement of the feed roller 38. The timing detection limit switch 42 detects the movement of the bracket 41 to control the timing of each device. Further, when two or more films 8 are fed into the feed rollers 38 and 39, the double feed detecting limit switch 43 is activated. The limit switch 43, the bracket 41 and the like constitute a double feed detecting means C.

The lower feed roller 39 is a driving roller, and a driven sprocket 45 provided at one end of a feed roller shaft 44.
The feed roller driving means D can be rotated in the forward and reverse directions through the above.

As shown in FIGS. 3 and 5, the feed roller driving means D includes a forward / reverse rotation motor 46 mounted on the frame 6 and capable of forward and reverse rotation, a sleeve 48 fixed to a motor output shaft 47, and a sleeve. A clutch member 49 screwed to 48, a driving sprocket (transmission body) 51 fitted to a sleeve 48 via a one-way clutch 50, and an endless chain 52 wound between a driven sprocket 45 and a driving sprocket 51.
And a resistor 53 for moving the clutch member 49 in the axial direction.

The sleeve 48 is provided at one end with a flange portion 48a that serves as a stopper for the clutch member 49, and is provided with a screw portion 54 following the flange portion 48a, and the clutch member 49 is screwed to the screw portion 54. Has been done.

The clutch member 49 is substantially disk-shaped and has a threaded portion 55 for screwing into the threaded portion 54 at the center and an engaging claw 56 on the end surface of the driving sprocket 51 side.

Further, the driving sprocket 51 is provided with an engaging claw 57 that meshes with the engaging claw 56 on the clutch member 49 side.

The one-way clutch 50 is configured to transmit only power to the feed roller 39 in the forward rotation direction,
A commercially available product can be used.

The resistor 52 is fixed to the frame 6 with a screw 58 so as to slide on the outer peripheral surface of the clutch member 49.
As shown in the figure, a curved sliding contact portion 53a and a mounting portion 53b are formed of spring steel. Then, the clutch member 49
Until the axial movement of is completed, that is, both engaging claws 56, 5
The clutch member 49 is not rotated until 7 is completely engaged or disengaged, and the clutch member 49 can be freely rotated when the engagement or disengagement of both engaging claws 56, 57 is completed.

Thus, the clutch member 49 and the sprocket 51
By the engaging claws 56, 57 of, and the screw portions 54, 55 and the resistor 53,
It constitutes a one-way transmission mechanism 59 for reverse rotation.

Therefore, the driving sprocket 51 is driven in the forward and reverse directions by the two one-way transmission mechanisms 50 and 59.

A guide plate 60 is arranged in front of the feed rollers 38, 39, and a pair of upper and lower feed rollers 61 are arranged in front of the guide plate 60. The feed rollers 61 are wound around a sprocket 62 provided on a shaft end 61a. It is adapted to be driven by the feed roller driving means D via the endless chain 52 which is formed.

An exit 63 is provided on the wall surface of the box 2 in front of the delivery roller 61, and the exit 63 communicates with a developing machine or a photographing machine (film processing machine) 64 so that the sheet film 8 is taken in by a pair of upper and lower take-in rollers 65. It has become. The exit 63 is provided with a film passage detection sensor 66.

67 is a saw-toothed film scraping member, 68 is a locking device for the lid 5, 69 is a film size detection device, 70 is a control device, 71 is a roll film processing device, 72 is a micro switch for roll film detection, 73 Is a roll film guide plate, and the roll film is sent out to the developing machine 64 or the like by the sending out roller 61.

Next, the operation of the above embodiment of the present invention will be described.

First, the lid 5 is opened, and the sheet film 8 is opened from the opening 3.
Is stored in the storage container 7. The sizes of the films 8 do not have to be uniform, and films 8 of various sizes can be stored at the same time. In this case, the front end edge and one side edge of each film 8 are stored in alignment.

Next, the lid 5 is closed. When the lid 5 is closed, the lock device 68 is activated, and it becomes inoperable from the outside.
Is prevented from opening.

Next, by pressing a start button (not shown), the crank drive motor 16 and the feed roll drive motor 46 start rotating in the arrow direction shown in FIG. At this time, the feed roller 39 is rotating normally through the one-way clutch 50 for normal rotation, and the swing arm 9 is at the highest position.

By the rotation of the crank drive motor 16, the crank 14,
The swinging arm 9 starts rotating downward around the support shaft 10 via the connecting rod 12. By the downward rotation of the swing arm 9, the suction means B and the rotation regulating plate 28 attached to the swing arm 9 also move downward. At this time, since the rotation restricting plate 28 is pulled backward by the spring 31 and the rotation restricting plate 28 and the stopper pin 32 are in contact with each other, the angle formed by the rotation restricting plate 28 and the swing arm 9 changes. It keeps a certain angle without doing. Therefore, the pin 33 provided on the rotation restricting plate 28 moves downward along an arc locus centering on the support shaft 10 of the swing arm 9.

When the pin 33 moves downward, it comes into contact with the guide plate 34. Since the guide plate 34 can freely rotate downward, as the pin 33 descends, the guide plate 34 also rotates downward.
The guide plate 34 is disengaged, the guide plate 34 returns to its original position and contacts the stopper pin 36.

Still further, when the swing arm 9 rotates downward, the suction cup 23 of the suction means B comes into contact with the upper surface of the front portion of the film 8 in the storage container 7. At this time, the spring 24 of the suction cup shaft 22 is compressed to soften the collision between the suction cup 23 and the film 8, and
The air in the concave portion of 23 is removed and a negative pressure is generated, and the film 8 is adsorbed by the suction cup 23. The compression of the spring 24 causes the suction cup shaft 22 and the valve shaft 26 to move upward with respect to the horizontal rod 20, but the negative pressure in the concave portion of the suction cup 23 is maintained.

At this time, since the suction cup 23 is provided so as to be deviated to one side, even in the case of a small film 8, only the film 8 is adsorbed and the large film 8 below is not adsorbed at the same time. Therefore, double feed is prevented.

Then, the swing arm 9 passes through the bottom dead center, the swing arm 9 starts to rotate upward, and the front portion of the film 8 sucked by the suction cup 23 is lifted. The front edge of the film 8 moves upward while slidingly contacting the scraping member 67, and if two or more films 8 are simultaneously lifted, the scraping member 67 causes the lower film 8 to drop.

When the swing arm 9 further rotates upward, the upper surface of the film 8 in the middle thereof contacts the restraining means 37.

Further, the pin 33 of the rotation restricting plate 28 contacts the lower surface of the guide plate 34. Since the guide plate 34 is prevented from rotating upward by the stopper pin 32, the pin 33 cannot move upward in a circular arc locus around the support shaft 10. There, the pin 33 moves along the lower surface of the guide plate 34. This pin 33
The rotation restricting plate 28 is rotated around the central axis of the horizontal rod 20 by the movement of. At this time, the spring 31 is extended.

Then, by the rearward rotation of the rotation restricting plate 28, the rotation restricting plate
The horizontal rod 20 fixed to 28 rotates, and the suction means B moves rearward. By this rearward movement of the suction means B, the restraint means 37
The film 8 between the suction cup 23 and the suction cup 23 is forcibly curved so as to have a center of curvature therebelow.

By forcibly bending the film 8 in this way,
When another film 8 is closely attached to the lower surface of the film 8 adsorbed by the suction cup 23, the film 8 on the lower surface is repelled by forced bending and dropped downward to be stored in the storage container 7, Double feed is prevented.

The position detection protrusion 17 of the crank 14 passes through the temporary stop detection photo sensor 18, and the drive motor 16 is temporarily stopped by the operation of the photo sensor 18, and the state is maintained for a predetermined time. In this way, the swing of the swing arm 9 is temporarily stopped and the movement of the suction means B is stopped, so that the forced bending state (at the time of maximum bending) of the film 8 is temporarily maintained, so that the film 8 is brought into close contact with the lower surface. The film 8 can be reliably dropped.

When a predetermined time has elapsed by the timer, the drive motor 16 starts to restart, the swing arm 9 starts to rotate upward, the pin 33 also moves upward accordingly, and finally the contact with the guide plate 34 is released. As a result, the rotation restricting plate 28 causes the spring 31 to
Is pulled and pivoted, and the suction means B moves forward. By the forward movement of the suction means B, the front end edge of the film 8 is caught by the pair of upper and lower feed rollers 38, 39.

When the swing arm 9 further rotates up and down, the valve operating lever 27 contacts the stopper 30, the valve lever 27 rotates around the shaft 29, and the inside of the recess of the suction cup 23 becomes atmospheric pressure.
The suction force of the suction cup 23 is released, and the film 8 is separated from the suction cup 23. This feed roller
When the films 8 and 38 are inserted into the film 8, the upper feed roller 38 is moved upward by the thickness of the film 8, the bracket 41 is rotated, and the timing limit switch 42 is operated, so that the timing of each device is set.

Then, the film 8 is sent forward by the feed rollers 38 and 39, and further sent to the developing machine or the photographing device 64 via the sending roller 61 in front of it.

When the sheet film 8 is caught between the take-in rollers 65 in the developing machine 64 and the like, the take-up roller 65 is made to have a conveying speed slightly faster than the feed rollers 38, 39, so that the sheet film 8 is It is taken in by the driving force of the take-in roller 65, and the feed rollers 38, 39 and the delivery roller 61 are rotated at the conveying speed of the sheet film 8. That is, since the driving sprocket 51 of the feed roller driving means D is driven by the motor output shaft 47 via the one-way clutch 50, the motor sprocket 51 is rotated faster than the motor output shaft 47 and is in the same idling state.

Therefore, the feed roller driving means D and the take-in roller
Even if you do not synchronize the 65 very difficult, there is no trouble such as stretching the sheet film 8 or causing wrinkles,
Transferred smoothly.

When the swing arm 9 reaches the top dead center, the crank 14
The position detection protrusion 17 passes through the stop photo sensor 19, and the drive motor 16 is stopped by the operation of the photo sensor 19. This completes the operation of taking out one film.

If two or more films 8 are eaten into the feed rollers 38, 39, the upper feed roller 38 is moved upward by more than the specified dimension, and the bracket 41 is pivoted largely. Detected by. By the operation of the limit switch 43, the forward / reverse rotation motor 46 rotates in the reverse direction, the clutch member 49 moves in the axial direction toward the driving sprocket 51, and the engaging claws 56, 57 are engaged with each other to be in the state shown in FIG. , Prime mover sprocket 51
Rotates in the reverse direction via the one-way transmission mechanism 59 for reverse rotation. Therefore, the feed rollers 38 and 39 and the feed roller 61 start reverse rotation.

By the reverse rotation of the feed rollers 38, 39, the film 8 which has been slightly fed is fed backward, and finally the front edge of the film 8 is separated from the feed rollers 38, 39. When the front edge of the film 8 is released from the feed rollers 38, 39, the rear edge of the film 8 contacts the upper surface of the other film in the storage container 7, and the rear edge of the film 8 returns to the original storage position. positioned.

Then, the front portion of the film 8 naturally falls downward. At this time, since the rear edge of the film 8 is located at the original position in the storage container 7, the front edge of the film 8 which naturally falls also completely falls to the original position.

When the film 8 falls into the storage container 7, the forward / reverse rotation motor
46 is switched to normal rotation, the drive sprocket 51 is rotated forward by the one-way clutch 50, and the clutch member
49 is retracted to separate both the engaging claws 56, 57, the feed rollers 38, 39 and the feeding roller 61 are switched to the normal rotation, the crank drive motor 16 is started again, and the sheet film 8 is removed from the storage container 7. Repeat the take-out operation. This operation is repeated until one sheet film 8 is eaten by the feed rollers 38, 39.

In the above embodiment, the one-way transmission mechanisms 50, 59 of the feed roller driving means D can be provided on the feed roller shaft 44.

The present invention is not limited to the above embodiment.

(Effect of the Invention) The feed roller drive means D is a clutch for forward rotation of the transmission body 51.
Since it is provided on the output shaft 47 via 50, the feed roller
By making the rotational power transmitted to 39 lower than the take-in roller 65 of the front film processing machine 64, the conveying speed of the sheet film 8 can be synchronized with the take-in roller 65, and the sheet film feeding device to the developing machine or the like. It is possible to smoothly and reliably feed the sheet film to the take-in roller 65 of the film processing machine 64 of FIG. 1, and further, the reversing one which is operated by the reverse rotation of the output shaft 47 between the output shaft 47 and the transmission 51. Since the direction transmission mechanism 59 is provided, the transmission body 51
Even when the output shaft 47 is provided via the one-way clutch 50 for forward rotation, the transmission body 51 can be rotated in the reverse direction when the double feed is detected, and the double feed of the sheet film 8 can be reliably eliminated.

Further, the reverse one-way transmission mechanism 59 has a screw member of the output shaft 47 and a clutch member 49 which is engageable with and disengageable from the transmission member 51, and the resistor 53 for preventing rotation and permitting rotation of the clutch member 49.
Since it has a simple structure in which only the structure is provided, it can be easily configured and mechanical, so that it can be inexpensive and highly reliable.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional side view of the whole, FIG. 2 is a partial front view of a swinging means and a suction means, and FIG. 3 is a III-III line of FIG. FIG. 4 is a perspective view of the resistor, and FIG. 5 is a cross-sectional view showing the state of the feed roller driving means at the time of reverse rotation. 1 ... Sheet film feeding device, 7 ... Storage container,
8 …… Sheet film, 38,39 …… Feed roller, 45
...... Driven sprocket, 46 …… forward / reverse rotation motor, 47 …… motor output shaft, 48 …… sleeve, 49 …… clutch member, 50
...... One-way clutch (one-way transmission mechanism for normal rotation), 51
...... Driving sprocket, 52 …… Endless chain, 53 …… Resistor, 54 …… Screw part, 56,57 …… Engagement claw, 59 …… One-way transmission mechanism for reverse rotation, A …… Swing means, B: adsorption means, C
...... Double feed detecting means, D ・ ・ ・ Feed roller driving means.

Claims (2)

[Scope of utility model registration request] 1. A pair of feed rollers (38) for feeding a sheet film (8) taken out from a storage container (7) to a take-in roller (65) of a front film processing machine (64).
(39) and two or more sheet films (8) between both feed rollers (38) and (39), when one feed roller (39) is opposed to the other feed roller (38)
Double feed detecting means (C) for detecting separation of
And a feed roller drive means (D) for rotating the one feed roller (39) in the forward and reverse directions, and the feed roller drive means (D) is provided with an output shaft ( 47) is provided with a transmission body (51) via a forward rotation one-way clutch (50), and this transmission body (51)
A sheet film feeding device capable of transmitting a rotational speed lower than that of the take-in roller (65) to the one feed roller (39) between the output shaft (47) and the transmission body (51). , Output shaft (4
A sheet film feeding device characterized in that it is provided with a unidirectional transmission mechanism (59) for reverse rotation which operates by the reverse rotation of (7) and transmits the reverse rotation to the transmission body (51). 2. The one-way transmission mechanism for reverse rotation (59) is screwed into a screw portion (54) on the output shaft (47) to form an output shaft (47).
The clutch member (49) that moves in the axial direction to approach the transmission body (51) by the reverse rotation of the clutch, and the engagement formed on the clutch member (49) and the transmission body (51) to engage due to the proximity of the clutch member (49). The interlocking pawls (56) (57) and the clutch member (49) are brought into an integral rotation preventing state at the time of starting the output shaft reverse rotation with respect to the output shaft (47) and are brought into an integral rotation allowing state after the engagement with the transmission body (51). 2. The sheet film feeding device according to claim 1, further comprising a resistor (53) that operates.