JPS6230027Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention involves opening the X-ray cassette in the device in a bright room, taking out photographic film, and inserting it into an automatic film processor, or opening and closing the lid of the device in a dark room. 1 by opening the lid and manually feeding
Regarding a film feeding device that inserts a sheet of X-ray film and conveys it to an automatic processor (for example,
Publication No. 16356).

Such a film supply device has a structure as shown in FIG.

In the figure, reference numeral 1 denotes a film feeding device, which is used in connection with an automatic film developing machine D. Reference numeral 2 denotes an opening/closing lid, and the opening/closing lid 2 is opened to set a cassette 3 containing photographed X-ray film into the apparatus. When the cassette 3 has been set, the opening/closing lid 2 is closed. When the opening/closing lid 2 is closed, the inside of the apparatus becomes a dark room, and when the cassette opening lever is rotated, the cassette 3 is opened to the state of the cassette 3 and the cassette lid 3a, and the X-ray film F contained therein falls due to its own weight. Then, it hits the feeding roller 5 and stops. Immediately before the feeding roller 5, a plurality of film detection elements 6 (infrared light emitting elements 6a
and a light-receiving element 6b, which often has a detection mechanism based on the presence or absence of a film between them.
Figure 2 shows the fallen sheet film F, the feed roller 5, and the detection elements 6 (61, 62, 6 in the figure).
3) shows the relationship. There is no problem when the film F falls normally as shown in figure a, but if it falls diagonally and is transported by the rollers 5 as shown in figure b, the sheet film may be bent or cracked during the subsequent transport process. This will cause a problem. Therefore, as shown in Figure A, the feeding roller 5 begins to rotate and conveys the film only when the plurality of detection elements 61, 62, and 63 have all detected the film. As shown in FIG. 2b, when all the plurality of detection elements do not detect the film, the feeding roller 5 remains stopped, the sheet film F assumes a normal posture, and all the detection elements detect the film. Once this is completed, transport begins. The sheet film F that has passed the feeding roller 5 advances along a film guide 6, and when it passes a micro switch 7 for film detection, a data imprinting light source 8 momentarily emits light to illuminate data 9. Data is lens system 10
Then, data is imprinted on one corner of the sheet film F that is passing through the guide 6 via the surface reflecting mirror 11. The sheet film F is conveyed to an automatic film developing machine D via rollers 12.

Next, manual feeding of the film feeder will be described. When you want to develop a film urgently or when you want to develop X-ray sheet films of different sizes, use manual feeding. Open the opening/closing lid 2 of the supply device 1 to make the room a dark room, and insert the sheet film into the guide section 1.
Insert along 3. The guide portion 13 may be a part of the film supply device, or may be formed by inserting a separate guide plate. The upper surface of the guide portion 13 is smooth and has an appropriate slope. When the sheet film F is placed on the upper surface of the guide section 13, the sheet film F slides down due to its own weight, and when the film detection elements 6a and 6b all detect the film as described above, the feeding roller 5 rotates and the film is transported. It is expected to be done. However, when the film size is small, it is difficult for all of the detection elements 61, 62, . . . to detect the film, which causes problems.

In the present invention, at least one of the film detecting elements is detected by opening the opening/closing lid of the film feeding device.
This is a film feeding device that has an electric circuit and structure that operates one part and disables the other.

In this invention, when the opening/closing lid of the film supply device is open, at least one film detection element near the supply roller is activated, so that small-sized films can be manually inserted along the guide plate. Since the supply roller rotates only when the film is detected, the film can be fed to the automatic developing machine without any problem even when manually feeding the film. Therefore, conventionally it has been impossible to manually insert and feed film with the lid open, but with the present invention, this can be easily done and there is no need for waiting time in an emergency, thereby providing a very convenient film feeding device. be able to.

Examples will be explained with reference to the drawings. FIG. 3 is a perspective view of the guide section. A rising portion 13a is provided on one side of the guide portion 13, and the sheet film F is inserted along the rising portion 13a. The film supply device 1 is provided with an opening/closing contact 14 which outputs a signal of 1 when the opening/closing lid 2 is closed and 0 when it is opened, thereby constructing a new circuit as shown in FIG. 4. Next, the circuit will be explained. Film detection elements 61, 62, 63 and micro switch 7
outputs a signal of 1 when film is detected, and 0 when it is not detected. When processing sheet film using the cassette 3, the opening/closing lid 2 is closed, so the signal at the opening/closing contact 4 becomes 1. This signal is inverted by the inverter 15, and one of the inputs of the OR gates 16 and 17 becomes 0. Therefore, when opening/closing 2 is closed, when the inputs of film detection elements 63 and 62 are 1, OR gates 16 and 17 each output 1, and it is not until the input of film detection element 61 becomes 1 that AND gate 18 outputs 1. All three inputs become 1, and the output of the AND gate 18 becomes 1. This signal enters the OR gate 19, and the output of the OR gate 19 becomes 1. This output enters the conveyance roller drive circuit 21, which causes the conveyance rollers 5, 1
2 rotates. When the film is transported and the leading edge of the film is detected by the film detection microswitch 7, the film detection microswitch 7 outputs a signal of 1, and the signal of 1 is input to the inputs of the OR gate 19 and the AND gate 20.

The other input of the AND gate 20 is a signal indicating that the opening/closing lid is closed, so it is currently set to 1.
Therefore, the input to the AND gate 20 becomes 1, which is input to the data burn-in circuit 22. The data 9 is burned in by the flash of the strobe 8 at this moment. The positions of the film detection microswitch 7 and the data burning section on the sheet film are such that when the leading edge of the film is detected at the position of the film detection microswitch 7, data burning is performed at a predetermined position. ing. After that, the film passes through the film detection element 61, but as long as the film is present in the film detection micro switch 7, one of the OR gates has an input of 1;
Since the output of the gate 19 is 1, the conveyance roller drive circuit 21 is turned on and the conveyance rollers 5 and 12 continue to rotate. When the trailing edge of the film passes the film detection micro switch 7, the transport roller drive circuit is turned off, but the leading edge of the film is caught by the roller of the processor and is pulled.

The transport rollers 5 and 12 are fitted with one-way clutches, and even if the drive is stopped, they will rotate if the film is pulled. The above is the operation when using a normal cassette.

The operation when processing a small-sized sheet film by manual feeding is as follows.

The opening/closing lid 2 is kept open in a dark room. Then, the signal at the opening/closing contact 14 is zero. This signal is inverted by the inverter 15 and becomes 1. The inputs of the OR gates 16 and 17 become 1, and the outputs also become 1. Therefore, when the opening/closing lid 2 is open, even if the film detection elements 62 and 63 are not detecting,
The input of the AND gate 18 is set to 1, and all that is left is if the output of the film detection element 61 becomes 1.
All three inputs of the AND gate 18 become 1, and the output becomes 1. At this time, if a small-sized sheet film is inserted into the film detection element 61, the conveyance roller will rotate. Since this small size sheet film does not require data printing, there is no problem even if the film is conveyed somewhat diagonally. Since the opening/closing lid 2 is open, the output of the opening/closing contact 14 is 0 and the AND gate 20
Since one of the inputs of is 0, AND gate 20
The output also becomes 0, and the strobe light emitting circuit does not operate.

Of course, it is effective to cut off the photographing electric circuit connected to the light emission of the strobe 8 not only when inserting small-sized film but also when inserting ordinary sheet film.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the film feeding device of the present invention seen from the side, Fig. 2 is a diagram showing the relationship between the film transport direction and the film detection element, and Fig. 3 is a perspective view of the guide section of the present invention. , FIG. 4 is an electrical circuit diagram of the present invention. 1...Film supply device, 2...Opening/closing lid, 6...
...Guide plate, 6a, 6b...Film detection element,
7...Micro switch, 13...Guide section, 1
4... Opening/closing contact, 21... Conveyance roller drive circuit, 22... Data burning circuit.

Claims (1)

[Scope of utility model registration request] It has the function of opening a cassette in the device, taking out the film in the cassette, and inserting it into the developing machine, and also the function of opening the opening/closing lid of the device to enable manual feeding of sheet film, and A film feeding device having a plurality of film detecting elements provided immediately before a feeding roller in the device, having a structure in which opening the opening/closing lid disables at least one of the film detecting elements but disables the others. film feeding device.