JP2003192153A - Film carrying device, and drive force limiting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film carrying device and a drive force limiting method capable of preventing any damages of a film package, a film and a winding and driving system even when the film cannot be easily taken out of a barrier bag caused by non-cutting. <P>SOLUTION: In the film carrying device 100 comprising a tray part 12 capable of charging a film package P with a photosensitive film packaged by a light shielding barrier bag 1, a winding means 20 capable of drawing out only the barrier bag 1 of the film package P charged in the tray part 12 and exposing the film in a carrying manner, and a winding and driving means 40 which has a winding motor 41 and drives the winding means 20, the winding and driving means 40 has a preventing means capable of preventing the drive force of not less than the preset magnitude from being applied to the winding means 20. The preventing means includes a mechanical means comprising a torque limiter 42 and an electric means comprising a motor current monitoring means 52 and a CPU 51. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film transport device and a driving force limiting method for the film transport device.

[0002]

2. Description of the Related Art Conventionally, a film transport device for transporting a recording film to a laser imager for recording medical image information such as CT or MRI on a film is known. FIG. 3 shows an example of a conventional film transport device. In the film transport device 10 shown in FIG.
The film package P shown in (a) is loaded in the tray portion 12 which is a rectangular parallelepiped box body. The film package P is a light-shielding barrier bag 1 in which a film laminate F formed by laminating a large number of films is housed. The film laminate F is accommodated in the inside in a state of being supported by the protective sheet 2, and the front end portion 3 and the rear end portion 4 of the barrier bag 1 are adhered to each other by heat sealing or the like (see FIG. 5B). It is stopped by tapes T and T.

When the tape is set on the tray section 12, the tapes T, T are removed, and as shown in FIG. 5 (b), the front end portion 3 and the rear end portion 4 are widened and the tape is pulled out from the conveying device 10. The film package P is set in the tray section 12. At that time, a plurality of locking holes 4a provided in the rear end portion 4,
4a ... Are inserted into a plurality of locking pins 13a (only one is shown in FIG. 4) of the winding roller 13 provided on the back side of the tray portion 12. In this state, the tray section 12 is pushed back into the apparatus housing 11 (direction of arrow A), and a shutter (not shown) is closed to make the inside of the tray section 12 a dark room.
At this time, as shown in FIG. 4A, the tip 3 of the barrier bag 1 protrudes from the front surface 12a of the tray 12, and the operator cuts the tip 3 in the vicinity of the two-dot broken line L. When it is opened, an outlet through which the film laminate F can be discharged is formed.

A winding means 20 for winding and pulling out only the barrier bag 1 is provided in the tray portion 12, and the winding means 20 and a winding roller 13 and a winding connected coaxially therewith. It consists of take-off gears 15 and 16. This winding gear 1
By rotating and driving 5 and 16 by a winding drive system including a motor, only the barrier bag 1 is wound with the film laminate F left on the bottom surface portion 12b.
As shown in (b), the film laminate F in the tray portion 12 is ready to be transported to the laser imager.
In FIG. 4, reference numeral 23 is a suction cup that constitutes film pick-up means for conveying the film to the laser imager.

[0005]

By the way, the operator may forget to cut the tip portion 3 of the barrier bag 1. If the trailing end portion 4 of the barrier bag 1 is attempted to be wound up by the winding drive system as described above in the case of forgetting to cut, the film laminate F is not discharged from the bag in the unopened state, so the film should be wound up smoothly. I can't. As a result, the locking holes 4a, 4a, ... May be pulled and torn by the locking pin 13a. If it breaks even further, the film inside will be exposed, and all unused film will become unusable, which may result in cost waste. Further, in such a case, since the winding drive system side tries to wind with full power, members such as gears constituting the drive system are deformed or damaged, and repair is required. In the worst case, the motor heats up and the entire drive system including the motor is replaced. Particularly in the case of a film package in which the inside of the barrier bag is decompressed, a strong force acts between the films in the bag and between the film and the barrier bag, so that the barrier bag is likely to be torn. Further, in the above situation, in the barrier bag of the type in which the tip is weakly bonded so that it is naturally opened by the force at the time of winding so that it is not necessary to cut, there is variation in the bonding force of the bonding part. It also happens in some cases.

An object of the present invention is to provide a film transporting device and a driving force limiting method capable of preventing damage to a film package, a film and a driving system even when a film cannot be easily discharged from a barrier bag due to forgetting to cut. Is to provide.

[0007]

The invention according to claim 1 of the present invention comprises a package loading section capable of loading a film package in which a photosensitive film is packaged in a light-shielding package,
A film transporting apparatus including a pulling-out unit that pulls out only the package of the film package loaded in the package loading unit and exposes the film so that the film can be transported, and a pull-out driving unit that drives the pulling-out unit and includes a motor. In the above, the pulling-out drive means is provided with a blocking means for blocking applying a driving force of a predetermined magnitude or more set in advance to the pulling-out means.

According to the first aspect of the present invention, the pulling-out driving means is provided with the blocking means for preventing the pulling-out means from being applied with a driving force of a predetermined magnitude or more. The above driving force is not applied to the extracting means. Therefore, even if the film cannot be easily ejected from the barrier bag due to forgetting to cut it and a situation in which a large force is required, the pulling-out means does not exert a force larger than a predetermined size. It is possible to prevent damage to the film, the film, and the winding drive system.

In the film transporting device according to the first aspect, as in the invention according to the second aspect, the blocking means is
It may be a mechanical means. The mechanical means has a mechanical structure that does not transmit the driving force to the pulling-out means when the driving force from the pulling-out driving means reaches a predetermined value or more. Further, as in the invention described in claim 3, the mechanical means may be a torque limiter. If a torque limiter is installed in the middle of the path through which the driving force is transmitted from the motor of the pull-out drive means, even if the torque of the pull-out drive means increases due to forgetting to cut the barrier bag, the torque limiter The clutch structure is disengaged, the driving force is not transmitted to the pull-out means side, the pull-out means stops its operation, and neither the drive system side nor the film package side is damaged.

Further, in the film transporting device according to the first aspect, as in the invention according to the fourth aspect, the blocking means may be an electrical means. Examples of the electrical means include a means for monitoring the driving force or a physical quantity related to the driving force (motor current, electric power, torque applied to the motor), and receiving the result to control the motor to stop.

Specifically, as in the invention described in claim 5, the electric means is motor current monitoring means for monitoring the current of the motor, and if the current reaches a predetermined state according to the monitoring result. For example, a stop means for stopping the motor may be provided. According to the invention described in claim 5, the motor current of the extraction drive means is monitored by the motor current monitoring means, and when the barrier bag or the like is forgotten to be cut, the load at the time of extraction becomes large and the motor current becomes excessive. If it becomes larger, the motor is stopped by the stop means. When a situation in which a force of a predetermined magnitude or more is required in this way is reached, the motor stops and the drawing means stops the drawing operation, so damage to the film package, the film, and the winding drive system can be prevented. Here, "the current reaches a predetermined state" may mean that the current value itself has reached a predetermined value,
It may be that the change in the current value has reached a predetermined value.

Further, in the film transport device described in claim 1, as in the invention described in claim 6, both the mechanical means and the electrical means may be provided as the blocking means. By thus providing both means, it is possible to more reliably prevent damage to the film package, the film, and the winding drive system.

According to a seventh aspect of the present invention, there is provided only a package loading section capable of loading a film package in which a photosensitive film is packaged in a light-shielding packaging body, and a packaging body of the film package loaded in the package loading section. Pull out,
A method for limiting the driving force of a pull-out driving means in a film transporting apparatus, comprising a pull-out means for exposing the film so that it can be conveyed and a pull-out drive means for driving the pull-out means and including a motor. The driving force limiting method is characterized in that the driving force applied to the pulling-out means is prevented from becoming larger than a preset value to limit the driving force. According to the invention described in claim 7, it is possible to obtain the same effect as that of claim 1.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a film transport apparatus according to the present invention will be described below with reference to the drawings. The external appearance of the main body of the film transporting device and the structure around the tray portion in this embodiment are exactly the same as those of the conventional film transporting device 10 shown in FIGS. 3 and 4, and the same members will be described with the same reference numerals. However, reference numeral 100 is used as the film transport device according to the present invention. The tray portion 12 of FIG. 3 is the package loading portion of the present invention. The barrier bag and film package used here are also the same as in FIG. The barrier bag B is not particularly limited in material and the like as long as it has a light-shielding property, flexibility and a certain degree of strength, but is made of, for example, a thin film having a laminated structure of a PET film and an aluminum foil. The protective sheet may be made of cardboard or made of resin.

FIG. 1 shows a winding drive means (drawing drive means) 40 provided in the film transport apparatus 100, and FIG. 1A is a plan view from above showing a partial cross section.
(B) is a side view. The winding drive means 40 includes a winding motor 41, a torque limiter 42, a first gear 43, a second gear 44, a transmission gear 45, and the like, and drives the winding means (pulling-out means) 20 of FIG. Is. The winding motor 41 has screws 47, 47 for the support 46.
The drive source of the winding drive means fixed by the CPU (Cent) via a motor drive circuit 56 described later.
It is controlled and driven by a ral processing unit) 51.
A cylindrical rotary shaft member 48 is fixed to the output shaft 41a of the winding motor 41 so as to rotate integrally therewith. The rotary shaft member 48 has a thin shaft portion 48a formed to have a smaller diameter from the middle.

A first gear 43 is slidably fitted on the base end of the thin shaft portion 48a with respect to the thin shaft portion 48a. A torque limiter 42 is provided at the tip of the thin shaft portion 48a. The torque limiter 42 is a slip clutch that uses a commonly used frictional force, and has an inner portion 42a mainly made of a spring and an outer portion 42b fixed to the first gear 43. Inner part 42a
Are fixed to the thin shaft portion 48a, and rotate together with the thin shaft portion 48a. A friction plate (not shown) is provided between the inner portion 42a and the outer portion 42b, and when the inner portion 42a rotates, the outer portion 4 is rotated by frictional force.
2b also rotates, and the first gear 43 also rotates. But,
When a force (torque) of a predetermined magnitude or more against the frictional force is applied to the outer portion 42b via the first gear 43, the friction plate comes off, and the rotational force is transmitted from the inner portion 42a to the outer portion 42b. Disappear.

The first gear 43 meshes with the second gear 44, and the second gear 44 meshes with the third gear 45. Further, the third gear 45 may directly or indirectly
It meshes with a transmission gear 17 that meshes with the winding gear 15. Accordingly, when the first gear 43 rotates, the transmission gear 17 linearly moves through the second gear 44 and the third gear 45, the winding gear 15 rotates, and the barrier bag 1 is wound. ing.

In the torque limiter 42, how much torque is applied to remove the inner portion 42a and the outer portion 42b can be set by selecting the torque resistance value of the friction plate. For example, the torque applied when the barrier bag is normally wound in a cut state is “8 kg · cm”, and the value that can be judged as abnormal when the barrier bag is wound in a state where the cutting is forgotten and the torque starts rising 20 to 30 kg · cm ”, the torque limiter 4
The threshold value of 2 is set to “15 kg · cm”, for example. In this way, it is preferable to set a value that has a certain margin with respect to both the normal value and the value at which it can be determined that an abnormality has clearly occurred. With this setting, when the torque is normal but slightly increased for some reason, the torque limiter 42 does not operate, and the torque limiter 42 operates sufficiently earlier than an apparent abnormal state, so that the barrier bag 1 Can be completely prevented from being overloaded.

FIG. 2 shows the control circuit 50 of the film transport device 100. The control circuit 50 includes a CPU 51, a motor current monitoring means 52 connected to the CPU 51,
It is composed of a barcode detection unit 53, a storage unit 54, a display device 55, a motor drive circuit 56, and the like. The motor current monitoring means 52 monitors the current flowing through the winding motor 41 and outputs it to the CPU 51. The storage unit 54 is, for example, a ROM (Read Only Memory), and has the winding motor 41.
Stores data related to the value of the current that flows when an abnormal load is applied to the. The type of this data may be, for example, the predetermined current value itself, or the amount of change in the increase in current. The motor drive circuit 56 includes the CPU 51.
Under the control of, the winding motor 41 is driven.

The CPU 51 compares the information on the actual motor current from the motor current monitoring means 52 with the data read from the storage unit 54, and if it judges that there is an abnormality, the CPU 51 winds it through the motor drive circuit 56. The motor 41 is stopped. That is, the motor current monitoring means 5 and the CPU 51
Is the blocking means as the electrical means of the present invention. Here, the threshold value for stopping the winding motor 41 is set as follows, for example. As in the above example, when the barrier bag is cut and wound normally, the torque applied to the winding motor 41 is “8 kg · cm”, and the winding is abnormal when the cutting is forgotten. The value is "20-30kg
In the case of “cm”, it is considered that the limit of the torque applied to the winding motor 41 is about “15 kg · cm”, the current value when the torque reaches such a value is set in advance, and the value is stored in the storage unit 54. You can store it in.

At the beginning of winding by the winding means 20, the barrier bag 1 is kept at a predetermined distance (for example, L in FIG. 5B).
(2 lengths) When the film is wound up, the bar code detecting section 53 provided in the film transporting apparatus 10 reads the bar code display section B provided on the upper surface of the barrier bag 1, and the CPU 51 is set normally. to decide. Information such as the size of the film in the barrier bag 1 can also be read by the barcode detection unit 53.

Either the timing of reading by the bar code detector 53 or the timing of stopping the motor in response to the operation of the torque limiter 42 or the detection of the motor current monitoring means 52 may be either. For example, the torque limiter 42 may be activated or the winding motor 41 may be stopped before the barcode is read. In such a case, the bar code is detected only when it is properly wound, and there is no waste in the control sequence. Alternatively, even if the user forgets to cut, the barrier bag 1 can be wound up a little, so the bar code is read, and then the torque becomes excessively large and the torque limiter 42 operates or the motor 4
The timing may be that 1 stops. In such a case, the barrier bag 1 is cut and reset, and the winding motor 41 is re-driven, but in this case, the bar code may not be read and the previously read data may be used as the film information. You may make it read a barcode.

Further, the CPU 41 is adapted to display predetermined information such as an error message on the display device 55. The displayed error contents include, for example, the fact that the winding motor 41 is stopped due to a winding failure and that the package is not set due to a barcode detection failure.

The above-described film transport apparatus 10 according to the present invention
According to 0, the winding drive means 40 serves as a mechanical means to prevent the winding force from being applied to the winding means 20 by a driving force of a predetermined magnitude or more.
2 and motor current monitoring means 52 and C as electrical means
The PU 51 is provided. Therefore, there is a case where the film cannot be easily discharged from the barrier bag due to forgetting to cut,
Even when the torque of the winding drive means 41 increases, the clutch structure of the torque limiter 42 is released when the torque reaches a predetermined value, and the driving force is not transmitted to the winding means 20 side. Alternatively, if the load increases and the current value of the winding motor 41 becomes excessively large, the CPU 51 stops the winding motor 41. In such a situation that a force of a predetermined magnitude or more is required, even if the torque limiter 42 is activated first, the winding motor 41 is stopped first according to the monitoring result of the motor current monitoring means 52. However, in any case, the driving force is not transmitted to the winding means 20, the winding operation is stopped, and the winding means 20 does not exert a force larger than a predetermined magnitude, so that the film is not used. Damage to the package, film, and winding drive system can be reliably prevented. Further, the present invention is more effective in the case where the barrier bag 1 of the film package P has a film in a degassed state because the bag is easily broken due to forgetting to cut.

The present invention is not limited to the above embodiment, and it is needless to say that the specific shape and structure can be appropriately changed. For example, in the above-described embodiment, the torque limiter, which is a mechanical means, is provided as the blocking means, and the current detection by the CPU is provided as the electrical means, but either one may be provided.
Moreover, the setting of concrete threshold values such as torque value and current value is
Of course, it can be changed freely. Further, the transmission of the driving force from the winding driving means, which is the pulling-out driving means, to the winding means is configured by the rotary gear train, but other configurations such as a pinion rack mechanism and a belt mechanism may be used. In addition, as the pulling-out means, the winding means for pulling out by winding has been described above, but the pulling-out means may be configured to pull out without winding.

[0026]

According to the present invention, the pulling-out driving means is provided with the blocking means for preventing the driving force having a predetermined magnitude or more from being applied to the pulling-out means. No force is applied to the withdrawal means. Therefore, even if the film cannot be easily ejected from the barrier bag due to forgetting to cut it and a situation in which a large force is required, the pulling-out means does not exert a force larger than a predetermined size. It is possible to prevent damage to the film, the film, and the winding drive system.

[Brief description of drawings]

1A and 1B are views showing a winding drive means provided in a film transporting apparatus according to the present invention, FIG. 1A is a plan view from above showing a part of a section, and FIG. 1B is a side view.

FIG. 2 is a block diagram of a control circuit provided in the film transport device according to the present invention.

FIG. 3 is a perspective view showing a schematic appearance of a conventional and a film transport apparatus of the present invention.

FIG. 4 is a vertical cross-sectional view of a tray unit of the film transport device of FIG.

FIG. 5 is a view showing a barrier bag, (a) is a side view,
(B) is a plan view from above.

[Explanation of symbols]

P film package B barcode F film laminate 1 barrier bag 12 Tray section 13 winding shaft 15, 16 Winding gear 17 Transmission gear 20 Winding means (drawing means) 40 Winding drive means (pull-out drive means) 41 winding motor 42 Torque limiter (blocking means) 43 First Gear 44 second gear 45 Third Gear 50 control circuit 51 CPU (stopping means) 52 Motor current monitoring means 53 Bar code detector 54 storage 100 film transport device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hidehiko Takahashi             591-7 Kamihirose, Sayama City, Saitama Konica Stock             In the company F term (reference) 2H020 DB01 DD01 DD08 MC31                 3F343 FA09 FA17 FC17 FC18 FC30                       GA01 GB01 GB02 GC01 GD01                       JA05 JC08 JC09 JC17 KB05                       LC24 LD30                 4C093 AA22 CA16 EE08

Claims (7)

[Claims] 1. A package loading unit capable of loading a film package in which a light-sensitive film is wrapped in a light-shielding packaging unit, and a packaging unit of the film package loaded in the package loading unit can be pulled out to convey the film. In the film transporting device, which is provided with a pulling-out means exposed to the outside and a pulling-out driving means including a motor for driving the pulling-out means, the pulling-out driving means applies a driving force of a predetermined magnitude or more to the pulling-out means. A film transport device comprising a blocking means for blocking the application. 2. The film transport apparatus according to claim 1, wherein the blocking means is a mechanical means. 3. The film transport apparatus according to claim 2, wherein the mechanical means is a torque limiter. 4. The film transporting apparatus according to claim 1, wherein the blocking means is an electrical means. 5. The electric means comprises motor current monitoring means for monitoring the current of the motor, and stop means for stopping the motor when the current reaches a predetermined state according to the monitoring result. The film transport device according to claim 4. 6. The film transport apparatus according to claim 1, wherein the blocking means includes both mechanical means and electrical means. 7. A film loading unit capable of loading a film package, in which a photosensitive film is wrapped in a light-shielding packaging unit, and a package unit of the film package loaded in the package loading unit can be pulled out to transport the film. A method for limiting the driving force of the pulling-out driving means in a film transporting apparatus, which comprises a pulling-out means exposed to the outside and a pulling-out driving means for driving the pulling-out means and including a motor. A driving force limiting method characterized in that the applied driving force is prevented from becoming larger than a preset value to limit the driving force.