JPH0121051B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for separating a large number of laminated sheet films at high speed in a sheet film imaging device used in an X-ray imaging system, etc., and feeding the separated sheets to an imaging section. This includes:

[Conventional technology]

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 method used was to insert the camera into the camera and separate it using a scraping mechanism provided on the camera body side. This type of device is known, for example, from West German Publication No. 1942988.

[Problem that the invention seeks to solve]

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

The main purpose of the present invention is to overcome the above-mentioned difficulties, and another purpose is to ensure that the operation of separating the outermost sheet from a stack of sheets is performed reliably.

[Means for solving problems]

As a means to solve this problem, for example, in this embodiment, a needle protection plate 67 having a return needle member 16 and a groove h portion is provided.

[Effect]

The outermost sheet film is removed by the return needle member 16.
When F' is returned to the side opposite to the photographing section side and separated from the stacked sheet film F, it can be moved to the side opposite to the photographing section side by means of the needle protection plate 67. Then, the needle protection plate 67 is returned to the initial position by the spring 69.

〔Example〕

Hereinafter, the sheet film feeding device shown in FIGS. 1 to 8 will be explained. In the figure, reference numeral 2 denotes 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 power transmission part is not shown) driven from 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
The rotation is also transmitted to the rotating shaft 7' by the idler gear 17 and the gear 8'. gear 8,
By rotating the shafts 10, 10' fixed to the shafts 10, 10' in the same phase, the shafts 12, fixed to the connecting plate 11, which are pivotally supported by the shafts 10, 10', are rotated in the same phase.
12' also rotates and moves in parallel 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 return member 16 maintains the state in which it is in contact with the uppermost sheet film F', and
Move F′ back to the side opposite to the shooting section.
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 attached to the return member 16 by a return needle.

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.

Reference numeral 26 is for bending and lifting both sides of the rear end of the sheet film F' returned in the direction opposite to the photographing section along section C of the member and guiding it to section d of the slit 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 pawl 41 back and forth, and the rotation of the cylindrical cam 27 causes the lever 29 to swing about 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
A guide 40 fixed to the plate 9 slides using the grooves of the side plates 3 and 4 as a guide, so that 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 tips of the stacked sheet films F other than the topmost sheet film F' on the photographing unit side; 49 refers to a film pressing roller that pushes down the tips of the stacked sheet films F other than the topmost sheet film F'; 50 is a guide roller that serves as a guide when the uppermost sheet film F' is sent out to the imaging section; 46 is a guide claw that serves as a guide when the uppermost sheet film F' is sent out to the imaging section; This is a stopper to prevent the sheet film from being sent out to the photographing section side. It is constantly lifted upward in the figure to a position that corresponds to the stopper 52. Reference numeral 53 denotes a film pressing roller upper and lower cam on which a roller 54 is fixed, which is fixed to the drive shaft 5. Rotation of this film pressing roller upper and lower cam 53 brings the roller 54 into contact with the extended portion of the sheet metal 44. So, sheet metal 4
4, the film pressing roller 48, guide pawl 49, guide roller 50, and stopper 46 can be swung vertically in the figure about the fulcrum shaft 43 at the same time. Here, the film pressing roller 4
Since the position of the sheet film F 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 film F' is moved to the photographing section. When the sheet film F is once returned in the opposite direction and then sent out toward the photographing section by the scraping claw 41, the effect of peeling it off from other stacked sheet films F tends to decrease.

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 since a constant force is always applied to the film push-up sheet metal 55 in the direction of the arrow in the figure, the number of films decreases. The degree of curvature of the laminated film F increases as the thickness increases.

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'. When the shafts 7 and 7' continue to rotate further, the return needle 1
While maintaining contact with the uppermost sheet film F', the return needle 16' moves linearly to return in the direction opposite to the imaging section from the initial position where it contacted the sheet film, and the slit member 18 ，
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 sheet film F'. 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, the scraping claw 41 begins to move toward the photographing section due to the action of the scraping cylindrical cam 27, and the uppermost sheet film F, which is curved upward by the tapered member 26, 'The sheet film F' is engaged with both sides of the rear end and sent out to the photographing section. Immediately before this scraping operation begins, the film press roller 48, guide claw 49,
By pushing down the guide roller 50 and stopper 46 downward in the figure, and pushing down the tips of the sheet films F other than the uppermost sheet film F' on the photographing section side, only the uppermost sheet film F is moved to the photographing section main body. can be sent out. (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.

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 above-mentioned sheet film feeding device will be explained. In FIG. 2, the return needle member 16 consists of a return needle 16' and a member with high frictional resistance (shaded area), and the tip of the return needle 16' protrudes only one sheet film length from the surface of the member with high frictional resistance. Because the return needle 16' only bites into one sheet film,
To prevent the second and subsequent sheet films from being returned and to prevent them from being scratched.

In FIG. 2, reference numeral 67 denotes a needle protection plate fixed to the film holder 2, and a detailed cross-sectional view thereof is shown in FIG. 9. The needle protection plate 67 is made of a material ( 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 process 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 process once, and when the return needle member 16 rotates idly with no sheet film. This is to protect the tip of the

A return needle is used as a means to return 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 large frictional resistance are used in combination. However, there is no limit to the number of return needles. 1st
FIG. 0 shows an embodiment in which three return needles 16' are attached to the return needle member 16. Furthermore, in the example, the return needle was attached perpendicular to the sheet film, but it is not necessary to do so.
The structure may be such that it is attached at an angle.

Here, as shown in FIG.
A needle protection plate 67 that can slide in the direction of the arrow is attached to the needle protection plate 67, and a spring 69 constantly applies a force to return the needle to its initial position in the right direction in the figure. The structure is such that it returns to its initial position after being returned to its original position.

〔effect〕

According to the present invention described above, 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 penetrates one film is used, so that the film can be returned and separated reliably. can do. This effect is particularly great when separating at high speed. Moreover, since the return needle is operated outside the photographing angle of view of the sheet film, the image does not become unsightly when viewed. Furthermore, since the sheet receiving plate is movable, when the last sheet film is returned, the resistance between the sheet film and the surface of the sheet receiving plate is reduced, and damage to the sheet film can be prevented.

Further, even if the laminated sheet film is lost, the tip of the return needle, especially the portion corresponding to one sheet film, is sufficiently protected.

[Brief explanation of drawings]

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. 9 and 11 are detailed views of the needle protection plate and the return needle, and FIG. 10 is a diagram showing a modified example of the return needle. In the figures, 2 is a film holder, 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 tapered member,
27 is a cylindrical cam for scraping, 41 is a scraping claw,
48 is a film pressing roller, 49 is a guide claw, 5
0 is a guide roller, 53 is a film presser roller upper and lower cam, 57 is a film ejection opening, 59, 60
61 and 70 are film feeding rollers, 61 and 70 are film bending members, 62 is an opening/closing lid, 63 is a shaft, 64 is a roller, 65 is a film return bar, F is a laminated sheet film, and F' is the topmost film. Sheet film, 6
7 is a needle protection plate, and 69 is a spring.

Claims (1)

[Scope of Claims] 1. The uppermost sheet film F' of the plurality of laminated sheet films F, F' is returned to its highest position by a return member 16 that is driven in a direction opposite to a predetermined feeding direction of the sheet film. Slit 18, 1 with a gap through which only the upper sheet film can enter
9 and the rear end of the uppermost sheet film is moved to the tapered member 26 that lifts up the uppermost sheet film F' to separate only the uppermost sheet film F' from the other stacked sheet films F, and then the return member is released. In the sheet transport device which engages the rear end of the separated sheet film F' with the scraping pawl 41 and sends it out in the predetermined delivery direction, a needle attached to the return member that pierces only one sheet film from above, A needle protection plate is provided on the lower side of the sheet film at a position facing the needle in the initial position of the return member, and the needle protection plate is provided at least when the lowermost sheet film moves or when the sheet film is moved. A sheet delivery device, characterized in that the sheet delivery device is capable of moving in a direction opposite to the predetermined delivery direction by following a needle attached to the return member in a state where the sheets are not stacked. 2. The sheet delivery device according to claim 1, wherein a return force is always applied to the needle protection plate to return it to the initial position.