JPH0734102B2 - Film take-out method and film take-out apparatus - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a film taking-out method and a film taking-out apparatus for taking out an X-ray film from a cassette.

[Background technology]

The cassette loaded with the X-ray film is designed so that the X-ray film is closely attached to the intensifying screen attached to the inner surface of the cassette to reduce the blurring of the image. In order to remove the film from the cassette, after opening the cassette, blow air directly from the bottom and the flow passage provided on the intensifying screen pasted on the bottom to release the close contact between the film and the intensifying screen. A cassette is disclosed in JP-A-58-68032.

However, in the cassette that blows air directly above to release the adhesion between the film and the intensifying screen, only the film around the flow passage receives the lifting force, and in the center of the film without the flow passage, static electricity causes the film to move. Remains in strong contact with the intensifying screen. To avoid this,
It is necessary to make the flow passage large in diameter, blow out extremely strong air, and to provide a large number of flow passages over the entire surface of the cassette, and it is necessary to use a large amount of air.

Further, if light penetrates into the cassette from the flow passage, it may cause film fogging. Therefore, in order to prevent this, it is necessary to provide a light-shielding shutter or the like in the flow passage, and the bottom of the cassette becomes thick. Further, a device for operating the light-shielding shutter and the like is also required.

[Object of the Invention]

In view of the above facts, an object of the present invention is to obtain a film taking-out method and a film taking-out apparatus which can release the close contact between the film and the intensifying screen and easily take out the film from the cassette.

[Structure of Invention]

The film take-out method according to the first aspect of the present invention blows air to the inner wall of the cassette and sends the reflected air from the wall in the direction toward the edge of the intensifying screen and the end face of the film and along the surface of the film. The present invention is characterized by including a film adhesion releasing step of lifting the film out of the intensifying screen and a film taking-out step of taking out the film from the cassette.

With the above structure, in the film contact release step, the reflected air of the air blown to the inner wall of the cassette is sent in the direction toward the edge of the intensifying screen and the film end surface and along the surface of the film. A gap is gradually formed between the screen and the film, and the edge of the film is peeled off from the screen. Once the peeling is started, the air is sent along the surface of the film and penetrates between the film and the intensifying screen like a wedge, releasing the close contact between the two and lifting the film from the intensifying screen. Therefore, the film can be easily taken out in the film taking-out step.

Also, because the reflected air from the inner wall of the cassette is used,
Even in the case where the gap between the inner wall of the cassette and the film is small, the air can be surely introduced between the film and the intensifying screen.

A film taking-out method according to a second aspect of the present invention is a film taking-out method for taking out a film, which is placed on an intensifying screen arranged on the bottom surface of a box-shaped cassette with its edge protruding from the intensifying screen, from the cassette. The air is blown to the inner wall of the cassette so that the air reflected from the wall surface is directed to the edge of the intensifying screen between the edge and the bottom and along the surface of the film. The present invention is characterized by including a film adhesion releasing step of lifting the film out of the intensifying screen and an extracting step of taking out the film from the cassette.

With the above structure, in the film contact release step, the reflected air of the air blown to the inner wall of the cassette is directed toward the intensifying screen edge between the edge of the film protruding from the intensifying screen and the bottom of the cassette. Is directed in a direction along the surface of the film so that the pressure on the lower surface of the film edge is greater than the pressure on its upper surface and the film is stripped from the intensifying screen edge. Once the peeling is started, the air is sent along the surface of the film and penetrates between the film and the intensifying screen like a wedge, releasing the close contact between the two and lifting the film from the intensifying screen. Therefore, the film can be easily taken out in the film taking-out step.

Also, because the reflected air from the inner wall of the cassette is used,
Even in the case where the gap between the inner wall of the cassette and the film is small, the air can be surely introduced between the film and the intensifying screen.

A film take-out device according to a third aspect of the present invention is a film adsorbing means for adsorbing a film placed on an intensifying screen placed on the bottom surface of the cassette by the sucker by making the air inside the sucker a negative pressure. And a moving means for moving the suction cup between a first position for adsorbing a film placed on the intensifying screen arranged on the bottom surface of the cassette and a second position for taking out the film from the cassette. So that when the suction cup is in the first position, the reflected air from the inner wall of the cassette is sent in the direction toward the edge of the intensifying screen and the end surface of the film and along the surface of the film. An air blowing nozzle for blowing air to the inner wall of the cassette, a position detecting means for detecting the position of the moving means, a film adsorbing means and the film by the signal from the position detecting means. It is characterized by having a control means for controlling the air and the moving means of the A blowout nozzle, the.

With the above configuration, the moving means is controlled by the control means and
Position and the second position. When the moving means is located at the first position, the air blowing nozzle is controlled by the controlling means on the basis of the signal from the position detecting means to blow the air to the inner wall of the cassette. The blown air is reflected by the inner wall, and the reflected air is sent toward the edge of the intensifying screen and the end surface of the film and along the surface of the film, whereby the air between the intensifying screen and the film is moved. Then, a gap is gradually formed, and the edge of the film is peeled off from the intensifying screen. Once the peeling is started, the air is sent along the surface of the film and penetrates between the film and the intensifying screen like a wedge, releasing the close contact between the two and lifting the film from the intensifying screen. Further, based on the signal from the position detection means, the film suction means is controlled by the control means, the air inside the suction cup is made a negative pressure, and the suction cup sucks the film,
The moving means is moved by the control means from the first position to the second position. Thus, the film is removed from the cassette. Therefore, the close contact between the film and the intensifying screen is reliably released by the air from the air blowing nozzle, and the film can be easily taken out by the moving means.

Also, because the reflected air from the inner wall of the cassette is used,
Even in the case where the gap between the inner wall of the cassette and the film is small, the air can be surely introduced between the film and the intensifying screen.

In one mode of the device of the present invention, since the air blowing nozzle is arranged in the moving means, the air blowing nozzle is moved together with the moving means, and it is not necessary to separately provide a driving device for moving the air blowing nozzle.

Furthermore, in one aspect of the device of the present invention, since the inner wall of the cassette has a convex surface that is convex toward the bottom surface in the portion where the air is blown, the air blown from the air blowing nozzle increases with the film. It is easy to get into a large amount between the screen and the sensitive screen, and it is possible to peel off the film adhered to the screen with a smaller amount of air blow.

Example of Invention

Embodiments of a film taking-out method and a film taking-out apparatus according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the X-ray film 14 (see FIG. 2) is automatically taken out from the cassette 12 by the film take-out device 10.

In this cassette 12, a lid 18 is hinged to a cassette body 16. Inside the cassette body 16, along the side wall 20
22 are provided. A band-shaped sponge 23 is attached between the side wall 20 and the inner wall 22, and when the lid 18 is closed, the lid is closed.
The edge portion 24 of the 18 presses the sponge 23 to prevent light from entering the cassette 12. An intensifying screen 26 is attached to the bottom surface of the cassette body 16 as shown in FIG. Generally, the surface of the intensifying screen 26 is slightly narrower than that of the film 14, and when the film 14 is placed on the upper surface of the intensifying screen 26, the film 14 projects from the edge of the intensifying screen 26. It is becoming like this. An inclined surface 27 is formed inside the upper portion of the side wall 20. A sponge (not shown) is attached to the inner surface of the lid 18, and an intensifying screen 26 is attached to the upper surface of the sponge.
Therefore, when the film 14 is placed on the intensifying screen 26 and the lid 18 is closed, the film 14 is sandwiched between the intensifying screens and pressed by the elastic force of the sponge, so that the intensifying screen and the film are The air between them is removed so that the film 14 comes into close contact with the intensifying screen. This close contact reduces image blurring.

The lid 18 is closed by inserting and engaging a slidably mounted latch 28 into the insertion opening 30 of the side wall 20, as shown in FIG. To open the lid 18, the protrusion 34 of the pusher 32 shown in FIG. 1 is moved in the direction of arrow A in FIG. 2, the latch 28 is pressed to release the lock, and the lid is lifted by a suction cup (not shown). It is going to be done. When closing the lid 18, the upper surface of the lid 18 is pressed by the presser 36.

The film take-out device 10 is configured by attaching a nozzle 38 for blowing air and a suction cup 40 for adsorbing the film to a rotating device 42.

In the rotating device 42, a support bar 47 is mounted on the tip of a rotating arm 44, and the rotating arm 44 is rotated about a fulcrum 46 by an actuator (not shown). The rotational position of the rotary arm 44 is detected by a limit switch (not shown), and the rotational movement of the arm 44 is controlled.

The nozzle 38 and the suction cup 40 are arranged in a pair and are arranged close to each other, and a plurality of pairs are connected by a connecting bar 48. The middle portion of the nozzle 38 is bent, and the direction of the tip portion thereof is directed toward the inner wall 22 when the suction cup 40 is placed on the film 14, as shown in FIG. At the other end of the nozzle 38,
A rubber hose 50 for supplying air is externally fitted.

The suction cup 40 is made of rubber, has a bowl shape, and is fitted and attached to the expanded diameter portion 54 which is the tip end portion of the pipe 52. The pipe 52 extends through the support bar 47, and the connecting bar 47
48 is a support bar 47 via a coil spring (not shown)
Are linked to. A link mechanism (not shown) is connected to the support bar 47, so that even if the rotating arm 44 rotates, a sucker.
The axial direction of 40 is always oriented in the direction orthogonal to the film. A rubber hose 56 for air supply is fitted on the other end of the pipe 52.

Rollers 58 and 60 for transporting the film are provided on the left side of FIG.

Next, the operation of the first embodiment constructed as described above will be described.

When the cassette 12 having been photographed is sent to the position shown in FIG. 1, the pusher 32 presses the latch 28, and the latch 28 is pressed.
The engagement with the insertion port 30 is released, and the lid 18 is opened by a suction cup (not shown). In this state, the air between the film 14 and the intensifying screen 26 is removed, and the film 14 is vacuum-contacted to the intensifying screen 26. Next, the rotary arm 44 is rotated toward the cassette 12 by an actuator (not shown), and the suction cup 40 is placed on the film 14 as shown in FIG. At the same time, the air is blown out from the nozzle 38, and as shown by the arrow in FIG. 3, the air hits the inner wall 22 and is reflected to the lower surface side of the film 14 protruding from the edge of the intensifying screen 26. Moving. As a result, the pressure on the lower surface of the film edge portion becomes larger than the pressure on the upper surface thereof, and the film 14 adhered to the intensifying screen 26 is peeled off from the edge portion. Once this peeling is started, the air penetrates between the film 14 and the intensifying screen 26 like a wedge, and the film 14
Rise from the intensifying screen 26. At this time, if the air in the suction cup 40 is evacuated through the pipe 52 and the rubber hose 56, the inside of the suction cup 40 becomes negative pressure, and the film 14 is adsorbed to the suction cup 40.

Next, when the arm 44 is rotated toward the rollers 58, 60, the film 14 is lifted by the suction cup 40, and the end portion of the film 14 is inserted between the rollers 58, 60. Then, the film 14 is nipped and conveyed between the rollers 58 and 60 by the rotation of the roller 58. At the start of this movement, the negative pressure in the suction cup 40 is released, and the film 14 separates from the suction cup 40. Next, the film 14 is placed on a roller conveyor (not shown) and conveyed to the developing processing side.

On the other hand, an unused film is loaded into the cassette 12 by a device (not shown), the lid 18 is closed, and the upper surface of the lid 18 is pressed by the presser 36. As a result, the latch 28 is pressed by the inclined surface 27 of the side wall 20 and is inserted and engaged in the insertion opening 30. Next, the cassette 12 is moved, another photographed cassette is sent, and the above processing is repeated.

In the first embodiment, the film green portion protruding from the intensifying screen makes it easy for the reflected air to be sent in the direction toward the green portion of the intensifying screen, and once the peeling is started, the air is like a wedge. Since the film 14 penetrates between the screen 14 and the intensifying screen 26 to release the close contact between them, the film 14 can be easily lifted from the intensifying screen 26. Therefore, the film 14 can be lifted from the intensifying screen 26 in a wide range with a small amount of air. Further, the suction cup 40 only needs to be able to lift the film 14, and a negative pressure smaller than that in the conventional example will suffice. Therefore, when the film 14 is adsorbed by the suction cup 40, excessive stress is not applied to the film 14 and deformation of the film 14 is prevented.

In addition, since the reflective air is used, the inner wall of the cassette 12
Even if the gap between the film 22 and the film 14 is small, the air can be surely infiltrated between the film 14 and the intensifying screen 26, and the flow passage unlike the conventional example is unnecessary, and the cassette can be made compact. Can be simplified and simplified. Further, since the nozzle 38 is sufficiently separated from the cassette inner wall 22, it is possible to prevent the nozzle 38 from colliding with the side wall 20 and the inner wall 22 and damaging the cassette 12 and the nozzle 38.

Further, both the air spraying means and the film suction means use air, which has the effect of simplifying the apparatus.

The pipe 52 and the nozzle 38 may be integrally molded. Further, the suction cup 40 and the nozzle 38 may be arranged at positions separated from each other. Further, the air sucked through the rubber hose 56 may be blown out from the nozzle 38 through the rubber hose 50.

Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, the inner wall 62 of the cassette body 16 has a convex surface, and the air blown from the nozzle 38 is
The X-ray film 14 protruding from the green portion can easily enter the lower surface of the X-ray film 14, and the X-ray film 14 adhered to the intensifying screen 26 can be peeled off with a smaller amount of air blow. The latch 28 in FIG. 1 and the insertion opening in FIG. 2 are provided on the side wall on the lower side of FIG. 1 (not shown).

The tip surface of the convex surface may be a flat surface instead of a curved surface.

〔The invention's effect〕

In the film taking-out method and the film taking-out device according to the present invention, the air is blown to the cassette inner wall to direct the reflected air from the wall surface toward the intensifying screen edge portion and the end surface of the film, which is the direction along the surface of the film or The gap between the intensifying screen and the film gradually increases in order to feed toward the edge of the intensifying screen between the edge of the film protruding from the intensifying screen and the bottom of the cassette and toward the edge of the intensifying screen. Or the pressure on the bottom of the film increases more than the pressure on the top,
Due to the pressure difference, the film peels from the edge of the intensifying screen, and once peeling starts, air is sent along the surface of the film and penetrates between the film and the intensifying screen like a wedge. The film can be easily peeled from the intensifying screen. That is, the film can be peeled off from the intensifying screen over a wide range with a small amount of air, whereby the film can be reliably taken out. Further, the film adhesion releasing step can reduce the force required for taking out the film in the film taking-out step, and has an excellent effect that the film is not deformed.

Furthermore, since the reflected air is used in the film contact release step, even when the gap between the inner wall of the cassette and the film is small, the air can be surely infiltrated between the film and the intensifying screen. Moreover, the cassette can be downsized and simplified without the need for a flow passage as in the conventional example.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an air blowing method and an air blowing device according to the present invention, FIG. 2 is a perspective view of a cassette shown in FIG. 1, and FIG. 3 explains the operation of the first embodiment. FIG. 4 is a partial sectional front view showing a second embodiment of the present invention. 10 …… Film extractor, 12 …… Cassette, 14 …… X-ray film, 22,62 …… Inner wall, 26 …… Intensifying screen, 38 …… Nozzle, 40 …… Sucker.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Tsuki 1250 Takematsu, Minamiashigara City, Kanagawa Prefecture Fuji Kikai Kogyo Co., Ltd. , U)

Claims (5)

[Claims] 1. A film is blown from the intensifying screen by blowing air onto the inner wall of the cassette to send the reflected air from the wall in the direction toward the edge of the intensifying screen and the end face of the film and along the surface of the film. A film taking-out method, comprising: a film adhesion releasing step of lifting the film and a film taking-out step of taking out the film from the cassette. 2. A film take-out method for taking out a film, which is placed on an intensifying screen placed on the bottom surface of a box-shaped cassette with its edge protruding from the intensifying screen, from the cassette, the method comprising: From the intensifying screen, the air is blown to the inner wall and the reflected air from the wall surface is sent in the direction toward the edge of the intensifying screen between the edge and the bottom surface and along the surface of the film. A film taking-out method, comprising: a film adhesion releasing step of lifting the film; and a taking-out step of taking out the film from the cassette. 3. A film adsorbing means for adsorbing a film placed on an intensifying screen placed on the bottom surface of the cassette by means of the suction disk with a negative pressure of air inside the suction cup, and a bottom surface of the cassette. Moving means for moving the sucker between a first position for adsorbing the film placed on the intensifying screen and a second position for taking the film out of the cassette, and the sucker for moving the sucker. Air is supplied to the inner wall of the cassette so that the reflected air from the inner wall of the cassette is sent to the edge of the intensifying screen and the end surface of the film in the first position and along the surface of the film. Air blowing nozzles for blowing out, position detecting means for detecting the position of the moving means, and air for the film suction means and the air blowing nozzles based on signals from the position detecting means. Film take-out apparatus characterized by and a control means for controlling said moving means. 4. The film take-out device according to claim 3, wherein the air blowing nozzle is provided in the moving means. 5. The film take-out device according to claim 3, wherein the cassette inner wall has a convex surface which is convex toward the bottom surface in a portion where the air is blown.