JPS6233183B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet film photographing apparatus used in an X-ray photographing system, etc., which separates a large number of stacked sheet films at high speed and feeds them into a photographing section.

Conventionally, sheet film separation means for high-speed sheet film imaging devices that need to take several images per second, such as in circulatory organ imaging, involves separating sheet films one by one using a separator provided in a supply magazine. The conventional method was to insert the camera into the camera and separate it using a scraping mechanism provided on the camera body.

However, this method has a problem in that the operation of inserting the sheet films one by one between the separators must be carried out in a dark room.

Furthermore, in recent years, in order to obtain images with higher diagnostic performance, there has been a demand for high-speed sheet film imaging equipment that can take images in any position, such as perpendicular to the floor, Furthermore, if the sheet film is used upside down, the stacked sheet film may fall over, or the surface of the stacked sheet film may be Although this results in instability, there is also the problem of how to separate and feed the sheet film in such a state.

By the way, the present applicant has proposed an improved device in Japanese Patent Application No. 55-15776 = Japanese Patent Publication No. 61-9209 and Japanese Patent Application No. 55-17404 = Japanese Patent Publication No. 61-9209 in order to solve the above-mentioned problems. . This is done by loading a large number of stacked sheet films into a supply magazine at once, and then returning the top sheet film of the stacked film sheets to the opposite direction to the direction in which they are fed into the photographing section. The present invention relates to a sheet film feeding device that separates only the film from other laminated sheet films and then feeds only the separated sheet film to the photographing section, and the present invention further improves this. The purpose is to provide a device that

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 to 8 show a sheet film feeding device according to the present invention,
2 is a film holder, and sheet film F is placed on it.
A large number of sheet films F are stacked, and the sheet film F is sent out from the take-out port 57 to the photographing section side. 1st
The figure shows a side view in the stopped state, FIG. 2 is a cross-sectional view, and FIG.
FIG. 4 is a sectional view showing the state in which the tapered member 2 is inserted into the slit formed by the
Figure 6 shows where both sides of the rear end of the sheet film F' are guided, and Figure 5 shows the uppermost sheet film F' being sent out to the photographing section and being inserted into the feeding roller on the photographing section main body side. FIG. 6, 7, and 8 are views showing cross sections AA, BB, and CC in FIG. 2, respectively.

Hereinafter, the configuration and operation of the sheet film feeding device according to the present invention will be explained in order.

In FIG. 2, which shows the stopped state, a large number of sheet films F are stacked on the film tray 2, the return needle member 16 is not in contact with the uppermost sheet film F', and the scraping claw 41 is moved in the direction of the arrow. It shows where you are trying to return. When a driving force to rotate the drive shaft 5 is transmitted from the photographing unit main body in this state, the rotation shafts 7 and 7' begin to rotate, and at the same time the return needle member 16 rotates clockwise (in the direction of the arrow) in parallel. exercise. Eventually, the return needle 16' attached to the return needle member 16 begins to come into contact with the uppermost sheet film F'. As the shafts 7 and 7' continue to rotate further, the return needle 16' moves linearly in the direction opposite to the photographing section while maintaining contact with the uppermost sheet film F', and the slit member 18 , 19 (FIG. 3, section a), the center portion of the rear end of the sheet film F' is inserted. Here, the plane connecting the tips of the two return needles 16' arranged in the return direction (return plane) is substantially the same as the plane on which the slit a is provided, so that they can be easily separated. Also, in the resetting direction, a film pressing roller 63 functions as a film deflection prevention member between the two resetting needles 16'.
is provided so that the film follows the above-mentioned return plane, and the uppermost film is surely inserted into the slit a and easily separated. Now, at the same time that the center part of the rear end of the sheet film F' is inserted into the slit a, the parts on both sides of the rear end of the returned uppermost sheet film F' curve upward along the C part of the tapered member 26. 4th
The state will be as shown in the figure. Before reaching this state, the scraping claw 41 has returned to the position shown in FIG. 3. Further, the shafts 7, 7' continue to rotate, and the return needle 16' moves the uppermost sheet film.
When it moves away from F′ and begins to perform rotational parallel motion,
The rotation of the drive shaft 5 in the direction of the arrow (FIG. 13) causes the cylindrical cam 27 to swing the cam follower 28 in the direction of the arrow about the fulcrum shaft 30. The rotation of the lever 29 pushes the rotating plate 31, thereby pushing out the shaft 34 fixed to the sliding plate 32 in the direction of the arrow, and the swinging levers 35 and 36 fitted to the shaft 34 move around the fulcrum shaft 37. oscillates in the direction of the arrow. In FIG. 6, a shaft 38 is fixed to the swing levers 35 and 36, and a scraping plate 39 is slidably fitted to the tip of the shaft 38, so that the scraping claw 41 is attached to the photographing section. The sheet film F' starts to move in the direction, engages with both sides of the rear end of the uppermost sheet film F' that is curved upward by the taper member 26, and sends the sheet film F' to the photographing section. Immediately before this scraping operation begins, the film press roller 48, guide claw 49, guide roller 50, and stopper 46 are pushed down in the figure by the action of the film press roller upper and lower cams 53, and the sheets other than the uppermost sheet film F' are pushed down. By pushing down the leading end of the film F on the photographing section side, only the uppermost sheet film F' can be sent out to the photographing section main body. (FIG. 5) By operating in this manner, by rotating the drive shaft 5 once, a large number of stacked sheet films F can be separated one by one and sent to the photographing section.

In the sheet film feeding device that operates as explained above, the uppermost sheet film
The mechanism for returning F′ in the direction opposite to the direction in which it is sent into the photographing section will be further explained. In FIG. 2, reference numeral 16 denotes a return needle member that holds the tip of the return needle 16' with the tip protruding by just one film, and a shaft 61 is fixed to the return needle member 16 as shown in FIG. A film press roller 63 is rotatably held between the return needle members 16 via a bearing 62. Here, return needle 16'
and the film press roller 63 are in a positional relationship such that the lower end of the film press roller 63 is approximately 0.5 to 1.0 mm above the tip of the retrieval needle 16' in FIG. When the return needle member 16 rotates and moves in parallel in the clockwise direction (arrow) in FIG.
Since the return needle member 16 and the film presser roller 63 move in unison, in addition to the part of the uppermost sheet film F' that is returned in the opposite direction to the photographing section that is hit by the return needle 16', the central portion is also pressed by the film presser. It is pressed down by rollers 63. Therefore, the center portion of the rear end of the sheet film F' is connected to the slit member 1.
When the sheet film F' is inserted into the slit formed by 8 and 19, it is smoothly inserted because the surface of the sheet film F' is stable.

In the previous embodiment, the film presser roller 63 held by the return needle member 16 was made rotatable, but it may also be fixed.Furthermore, as shown in FIG.
4 may be fixed. This is possible because the uppermost sheet film F' is reliably returned in the direction opposite to the photographing section by the return needle 16', so that the sheet film is not scratched by the film presser metal plate 64. .

As explained above, if the film holding roller 63 is installed between the return needle members 16 and moves in unison with the return needle member 16, it returns the uppermost sheet film F' while pressing the surface. It is possible to measure the stability of the surface of the sheet film F', and to smoothly insert the center portion of the rear end of the sheet film F' into the slit. This applies not only when the sheet film feeding device is used horizontally to the floor, but also vertically.
Furthermore, when used upside down, the laminated sheet film F may fall over, or the direction of gravity acting on the sheet film may fall downward, so the surface of the laminated sheet film F may fall. However, according to this embodiment, the effect is further exhibited. In other words, in the example shown in FIG. 10 when the sheet film falls vertically, the stacked sheet films bend downward in the figure, causing the uppermost sheet film to fall into the slit (section a).
However, as shown in FIG. 11, the film pressing roller 63 suppresses the deflection of the central portion of the sheet film, so that the uppermost sheet film F' can be inserted smoothly into the slit. Because you can.

Furthermore, when the sheet film F' that has been returned and separated in the direction opposite to the photographing section is sent out to the photographing section by the scraping claw 41, the central portion of the sheet film being sent out becomes unstable and tends to hit other members. As shown in FIG. 12, the presence of the film pressing roller 63 has the advantage that the sheet film does not hit other members and is fed to the photographing section with less resistance.

As described above, according to the present invention, a plane (returning plane) connecting the tips of a plurality of return members provided in the film return direction is specified, and a sheet deflection prevention member is provided between the return members. By returning the film to the restoring plane, the outermost sheet film can be separated more reliably.

[Brief explanation of the drawing]

FIG. 1 is a side view of the sheet film feeding device of the present invention in a stopped state, FIG. 2 is a sectional view thereof, FIGS. 3, 4, and 5 are sectional views when it is in operation, and FIGS. The figure and FIG. 8 are diagrams showing cross sections AA, BB, and CC in FIG. 2, respectively. FIG. 9 is a diagram showing another embodiment.
FIGS. 10 to 12 are diagrams for explaining the effect when the device falls vertically, and FIG. 13 is a diagram showing the relationship between the scraping claw and the scraping cylindrical cam. In the figure, 2 is a film receiver, 5 is a drive shaft, 16 is a return needle member, 16' is a return needle, 18 and 19 are slit members, 26 is a taper member, 27 is a cylindrical cam for scraping, 41 is a scraper claw, and 48 is a Film press roller, 49 is a guide pawl, 50 is a guide roller, 53 is a film press roller upper and lower cam, 57 is a film ejection opening, 59 and 60 are feeding rollers on the photographing section side, 61 is a shaft, 62 is a bearing, 63 is a film A holding roller, 64 is a film holding sheet metal, F is a laminated sheet film, and F' is the uppermost sheet film.

Claims (1)

[Scope of Claims] 1. The outermost sheet film F' of a large number of laminated sheet films F is once returned to the direction opposite to the direction in which it is fed into the photographing section, and other sheet films in which only this sheet film is laminated are produced. In the sheet film feeding device that separates the separated sheet film from the sheet film and then sends only this separated sheet film to the photographing section, a plurality of sheets are used in the returning direction to return the outermost sheet film in the opposite direction to the direction in which the outermost sheet film is fed into the photographing section. Return members 16, 16' provided
A sheet film feeding device comprising: a film deflection preventing member 63 which is disposed between the restoring members in the restoring direction and is movable integrally with the restoring members. 2. The sheet film feeding device according to claim 1, wherein the film deflection preventing member comprises a roller 63. 3. The sheet film feeding device according to claim 1, wherein the return member comprises a needle 16'.