JPS6242810B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is a sheet transport device, for example, a sheet film photographing device used in an X-ray photographing system, in which a large number of laminated sheet films are separated at high speed and photographed. It relates to a device that feeds into the department.

[Prior Art] Conventionally, as a means for separating sheet films in high-speed sheet film imaging devices that need to take several images per second, such as in circulatory organ imaging, sheet films are separated into a separator provided in a supply magazine. The method used was to separate the sheets one by one, insert them, and then separate them using a scraping mechanism provided on the main body of the photographing unit.

However, this method has a problem in that the operation of sandwiching the sheet film one by one between the separators must be performed in a dark room.

In order to solve this problem, Japanese Patent Application Laid-Open No. 56-113640 = Japanese Patent Publication No. 61-9210 discloses that the upper sheet film is once displaced in the opposite direction to the feeding direction to separate it from the other laminated sheet films. An apparatus for feeding the separated sheet film in a feeding direction is disclosed.

However, with the upper sheet film displaced in the opposite direction to the feeding direction and separated from the other stacked sheet films, a new unrecorded sheet film is loaded into the magazine and placed on top of the already stacked sheet film. Further stacking of the materials will cause trouble in the subsequent unloading operation.

[Objective] An object of the present invention is to provide an improved sheet discharging device that can reliably avoid the above-mentioned troubles.

[Example] Hereinafter, a sheet film feeding device shown in FIGS. 1 to 8 will be described as an example of the present invention. In the figure, 1 is a magazine for stacking sheet films, 2
1 is a film tray, on which a large number of sheet films F are stacked, and the sheet films F are sent out from a take-out opening 57 toward the photographing section. Reference numeral 5 denotes a drive shaft (the dynamic transmission part is not shown) driven by the photographing unit main body, which rotates a rotating shaft 7 via bevel gears 6 and 6', and a gear fixed to the outer part of this rotating shaft. 8, an idler gear 17, and a gear 8', the rotation is also transmitted to the rotating shaft 7'.
By rotating the shafts 10, 10' fixed to the gears 8, 8' in the same phase, the shafts 10, 1
The shafts 12 and 12' fixed to the connecting plate 11, which is pivotally supported at 0', also rotate and move parallel to each other in the same phase.

The slide plate 13 is a metal plate that holds the return member 16 and is connected to the shaft 1 fixed to the connecting plate 11.
2, 12' are pivoted to the shafts 12, 12' so that the elongated hole portions can freely slide in the vertical direction, and tension springs 14, 14' are provided between the slide plate 13 and the shafts 12, 12'. is attached so that the return member 16 is always lowered downward in the figure. gear 8,
8' in the clockwise direction (in the direction of the arrow), the shafts 12, 10' and the connecting plate 11 are rotated.
By rotating and parallelly moving the slide plate 12', the slide plate 13 and the return member 16 are caused to rotate and move in parallel clockwise (in the direction of the arrow).

When the return member 16 makes rotational parallel motion, at the point when the return member 16 contacts the uppermost sheet film F', the shafts 12, 12' continue their rotational parallel motion, but the slide plate 13 and the return member 16 In this case, the elongated hole of the slide plate 13 is connected to the shaft 1.
2 and 12', the returning member 16 returns the uppermost sheet film F' to the side opposite to the photographing section while keeping it in contact with the uppermost sheet film F'. move like that. As the shafts 12, 12' further rotate and parallel move, the shafts 12, 12' come into contact with the uppermost part of the elongated hole of the slide plate 13, and the return member 16 separates from the uppermost sheet film F', and the slide plate 13 The return member 16 also undergoes rotational parallel movement in the same manner as the shafts 12, 12'. 16' is return member 1 with return needle
It is attached to 6.

The slit members 18 and 19 are integrally constructed, and the slit (a
There is only a gap for one sheet film, and only one sheet can be separated by inserting the returned sheet film into the slit.

The slit member 18 is rotatably supported on a shaft 22 provided on a lever 20 that is rotatably installed on a shaft 23, and the biasing force of a torsion spring 24 and the rollers 25 fixed on the slit member 19 are By moving up and down using the roller guide plates 58, 58' as guides, the b side of the slit member 18 is always in contact with the upper surface of the sheet film F.

26 is for bending and raising both sides of the rear end of the sheet film F' that has been returned in the direction opposite to the photographing section along the C part of the member, and guiding it to the slit d provided at the upper part of the member. The tapered member creates a space between it and other stacked sheet films, thereby positioning the rear end of the sheet film F' to the photographing section.

The cam 27 fixed to the drive shaft 5 is a cylindrical cam for moving the scraping claw 41 back and forth, and the rotation of the cylindrical cam 27 causes the lever 29 to swing around the fulcrum shaft 30 via the cam follower roller 28. By sliding the roller 31 by swinging the lever 29, the connecting lever 32 provided with the roller 31 is slid. A shaft 34 fixed to this connecting lever 32 is connected to the scraping levers 35 and 36.
When the connecting lever 32 slides, the scraping levers 35 and 36 swing around the fulcrum shaft 37 because they are engaged with the elongated holes.

A pin 38 is fixed to the scraping levers 35 and 36 and is engaged with an elongated hole in the sheet metal 39. When the scraping levers 35 and 36 swing, the sheet metal 3
When the guide 40 fixed to the plate 9 slides using the grooves of the side plates 3 and 4 as a guide, the metal plate 39 slides back and forth.

Reference numeral 41 denotes a scraping claw fixed to the sheet metal 39, which is engaged with both sides of the rear end of the sheet film F' guided to the slit d portion of the tapered member 26, and sends out the sheet film F' to the photographing section. It is for. Here, the cam follower roller 28 traces the cam surface of the cylindrical cam 27 by the force of a spring (not shown).

Reference numeral 48 denotes a film pressing roller that presses down the ends of the stacked sheet films F other than the topmost sheet film F' on the photographing unit side; 49 indicates a stacked sheet film F other than the topmost sheet film F';
The tip of the top sheet film is pushed down.
A guide claw serves as a guide when F' is sent out to the imaging section, 50 is a guide roller at that time, and 46 is a guide roller that serves as a guide when F' is sent out to the imaging section. This is a stopper to prevent it from being sent out to the side, and these four members are fixed to a metal plate 44 as one body, and are constantly moved around the fulcrum shaft 43 to a position where they hit the stopper 52 by the biasing force of the torsion spring 45. It is lifted upward in the figure. 53
is a film presser roller upper and lower cam on which a roller 54 is fixed, which is fixed to the drive shaft 5. Rotation of this film presser roller upper and lower cam 53 brings the roller 54 into contact with the extension of the sheet metal 44. ,
At the same time as the sheet metal 44, the film pressing roller 48,
Guide claw 49, guide roller 50, stopper 4
6 can be swung in the vertical direction in the figure around the fulcrum shaft 43. Here, since the position of the film pressing roller 48 when pressed down is always constant, as the number of stacked films F decreases, the degree of curvature of the sheet film F decreases, and the uppermost sheet When the film F' is once returned in the direction opposite to the photographing section and then sent out in the direction of the photographing section by the scraping claw 41, the effect of peeling off from other stacked sheets of film F tends to be reduced. be.

The film push-up metal plate 55 is provided to compensate for the above drawbacks. This is a metal plate for pushing up the vicinity of the tip of the sheet film on the photographing section side, and is biased in the direction of the arrow in the figure by a tension spring (not shown) about the fulcrum shaft 56. As the number of films F decreases, the stiffness of the stacked films F weakens, and the film push-up sheet metal 55 has the following effects:
Since a constant force is always applied in the direction of the arrow in the figure, the degree of curvature of the stacked films F increases as the number of films decreases.

Therefore, even though the position when the film pressing roller 48 is pressed down is constant, the uppermost sheet film F' and the other laminated sheet films F are separated by the action of the film push-up sheet metal 55. The effect remains almost constant.

Next, the operation will be explained step by step.

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
The center portion of the rear end of the sheet film F' is inserted into the slit for one sheet film (FIG. 3, section a) formed by the slit (FIG. 3, section a). At the same time, both side portions of the rear end of the returned uppermost sheet film F' curve upward along the C portion of the tapered member 26, resulting in a state as shown in FIG. 4. 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,
Due to the action of the scraping cylindrical cam 27, the scraping claw 41 begins to move toward the photographing section, and the taper member 26
It engages with both sides of the rear end of the uppermost sheet film F', which is curved upward, and feeds 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 uppermost sheet film is removed.
By pushing down the tips of the sheet films F other than 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 described above, the stop position is when the uppermost sheet film F' is returned to the slit by the return member. A problem arises in that the sheet film other than the top layer has already been inserted into the slit. In order to eliminate this inconvenience, a mechanism for returning and arranging the uppermost sheet film F' that has been returned and separated into the slit to the same position as the other stacked sheet films will be further explained. Returning to FIG. 1, reference numeral 62 denotes an opening/closing lid of the present sheet film feeding device, through which unphotographed sheet films are taken in and taken out. Koro 64 is
It is rotatably supported on a shaft 63 attached to the opening/closing lid 62. Further, a film return bar 65 is slidably attached to the housing 1, and this bar is urged in the direction of the rollers 64 by a compression spring 66. When the opening/closing lid 62 is closed, the film return bar 65 is arranged so as to come into contact with the roller 64. In FIG. 1, the opening/closing lid 62
is in the closed state, the film return bar 65
The portion e (the right end of the left-hand bent portion) is located at the position indicated by the solid line, and does not prevent the uppermost sheet film F' from being returned in the direction opposite to the photographing section. When the opening/closing lid 62 is opened in the direction of the arrow g in FIG. 1 (indicated by the two-dot chain line in FIG. If the uppermost sheet film F' has been moved to the position indicated by the dotted chain line and has already been returned in the direction opposite to the photographing section and inserted into the slit (Fig. 2, part a), the sheet film
F' can be returned to the same position as the other stacked sheet films F.

As explained above, by opening the opening/closing lid 62 of the present sheet film feeding device, the part e of the film return bar 65 moves to the position indicated by the two-dot chain line in FIG. Even when loaded, the sheet film is not inserted into the slit, and the uppermost sheet film can be continuously fed to the photographing section. Then, when loading the unphotographed sheet film in several batches, the top sheet film of the already loaded sheet films is inserted into the slit due to the resistance of the next sheet film to be loaded. It also has the effect of preventing it even if it is about to happen.

Furthermore, when some unphotographed sheet film remains in the sheet film feeding device, and when supplementing with additional unphotographed sheet film, the uppermost sheet film of the remaining sheet films is inserted into the slit. This means that However, according to this embodiment, the opening/closing lid 62
By opening the slit, the sheet films in the slit are returned to the same position as the other stacked sheet films and arranged, so there is no problem that sheet films other than the top one are inserted into the slit.

Next, a mechanism for returning the uppermost sheet film F' in the direction opposite to the direction in which it is fed into the photographing section in the sheet film feeding device described above will be further explained. In FIG. 2, the return needle member 16
It consists of a return needle 16' and a member with high frictional resistance (the shaded part), and because the tip of the return needle 16' protrudes only one sheet film length from the surface of the member with high frictional resistance, the return needle 16' Since it bites into only one sheet film, it prevents the second and subsequent sheet films from being returned and also prevents them from being scratched.

In FIG. 2, reference numeral 67 denotes a needle protection plate fixed to the film holder 2, and a detailed sectional view thereof is shown in FIG. The tapered tip portion of the return needle 16' is configured to slide in the groove h of the needle protection plate 67.
This occurs when the return needle member 16 repeats the return stroke once when the last film of the stacked sheet films is fed into the photographing section, and when the return needle member 16 repeats the return stroke once and when the return needle member 16 rotates idly without a sheet film. This is to protect the tip of the

A return needle is used as a means for returning the uppermost sheet film F' in the direction opposite to the direction in which it is fed into the photographing section, and in the previous embodiment, one return needle and a member with high frictional resistance are used in combination. However, there is no limit to the number of return needles.
In FIG. 10, the return needle 1 is attached to the return needle member 16.
An example in which three 6' are attached is shown. Further, in the embodiment, the resetting needle is attached perpendicularly to the sheet film, but this is not necessarily necessary, and the resetting needle may be attached obliquely at an angle.

In order to protect the tip of the return needle 16', we have shown a case in which a grooved needle protection plate is fixed to the film holder, but as shown in FIG. The needle can be protected by attaching the needle protection plate 68 and constantly returning it to the right in the figure by the spring 69, so that it returns to its original position at any time in response to the return movement of the returning needle 16'. .

Here, in order to return the uppermost sheet film in the direction opposite to the direction in which it is fed into the photographing section, a return needle that only bites into one film is used, so that it can be returned and separated reliably. This effect is especially great when separating at high speed.
Furthermore, since the return needle operates outside the photographing angle of view of the sheet film, it does not look unsightly when photographing.

In addition, even if the laminated sheet film runs out, the tapered tip of the return needle slides in the groove of the needle protection plate, so that the tip of the return needle, especially the part that corresponds to one sheet film, is sufficient. protected.

Further, in the sheet film feeding device operating as described above, a mechanism for feeding the uppermost sheet film F' that has been returned to the slit and separated to the photographing section will be further explained. In FIG. 4, the uppermost sheet film is guided to the slit d provided at the upper part of the tapered member 26.
The scraping claws 41 are engaged with both sides of the rear end of F' and moved in the direction of the arrow to feed the sheet film F' to the photographing section. In Figure 6, scraping claw 4
A guide 40 that slides using the grooves of the side plates 3 and 4 as a guide is attached to the metal plate 39 to which the plate 1 is fixed. Further, the film curved member 61 is also fixed to the sheet metal 39, and the lower end surface of this member 61 is located 2 to 3 mm below the slit d portion of the tapered member 26 in FIG. The portion outside the protruding claw 41 is bent downward in the figure.
When feeding the uppermost sheet film F' to the photographing section, the film bending member 61 is moved by the scraping claw 4.
1, and scrapes out the sheet film F' from the scraping claw 41 of the sheet film F' while keeping the outer part bent. This is done by bending the outer part of the sheet film F' to create a space between it and the other stacked sheet films, thereby reducing the resistance between the sheet films and the uppermost sheet film F'. It is designed so that it can be scraped out smoothly.

In the previous embodiment, the film bending member 61 was structured to move integrally with the scraping claw 41, but FIGS. 12 and 13 show the case where the film bending member 70 is fixed to the side plates 3 and 4. . When the uppermost sheet film F' is scraped out to the imaging section, the bending member is long enough to maintain the bent state until the leading edge of the sheet film F' enters the imaging section side feeding roller. 70, the sheet film F' can be scraped out with the outer portion of the scraping claw 41 being bent.

As a result, when the uppermost sheet film F' is fed out to the photographing section, if the outer part of the scraping claw 41 is kept curved, the film will be scraped out as if a single line had been passed in the sheet film feeding direction. Not only does it have the effect of strengthening the back of the sheet film, but it also creates a space between it and other stacked sheet films, reducing the resistance between the sheet films, allowing the sheet film F' to be sent smoothly to the imaging section. can. When this sheet film feeding device is used not only horizontally to the floor, but also vertically or even upside down, the stacked sheet films F may fall over or the sheet film Since the direction of the gravity applied to the film is in the downward direction, the resistance between the sheet film F' being scraped out and the laminated sheet films increases, which tends to result in poor scraping. However, according to this embodiment, in which the outer portion of the scraping claw 41 is scraped out while being curved, the resistance between the sheet films can be reduced, so that the effect is even greater.

[Effects] As described above, according to the present invention, even when the opening/closing lid is opened and a new sheet is loaded, the topmost sheet is constantly displaced in a direction different from the predetermined feeding direction, so that it is securely connected to other stacked sheets. Can be separated.

[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 FIG. 4, and FIGS. 7 and 8 are views showing the BB and CC sections in FIG. 2, respectively. FIG. 9 is a detailed view of the needle protection plate, FIGS. 10 and 11 are views of a modified example of the return needle, and FIGS. 12 and 13 are views of a modified example of the film curved member. In the figure, 2 is a film receiver, 3 and 4 are side plates, 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 scraping cam, 41 is a scraping claw, 48 is a film press roller, 49 is a guide claw, 50 is a guide roller, 53 is a film press roller upper and lower cam, 57 is a film take-out port, 5
Reference numerals 9 and 60 indicate photographing unit side feeding rollers, 61 and 70 indicate film bending members, 62 indicates an opening/closing lid, 63 indicates a shaft, and 6
4 is a roller, 65 is a film return bar, F is a laminated sheet film, F' is the uppermost sheet film, 67 and 68 are needle protection plates, and 69 is a spring.

Claims (1)

[Scope of Claims] 1. A magazine 1 in which sheets F and F' are stacked is provided with an opening/closing lid 62 for taking sheets in and out of the magazine, and with the opening/closing lid in the closed state, the topmost of the stacked sheets is In the sheet delivery device that once displaces the sheet F' in a direction different from the predetermined feeding direction to separate it from other stacked sheets F, and sends out the separated sheet F' in the predetermined feeding direction, the opening/closing lid 62 The sheet is characterized by having return means 64, 65, and 66 for returning the sheet F', which has been displaced in a direction different from the predetermined feeding direction, to its original position in conjunction with switching from the closed state to the open state. Export device.