JPH0355954Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a cassette telephoto camera that is combined with an X-ray fluoroscopic imaging table and feeds the cut film stored in a magazine to the X-ray imaging position one by one while being sandwiched between intensifying screens. This relates to improvements in equipment.

Conventionally, in order to miniaturize the entire device, X-ray fluoroscopic imaging tables incorporating a cassette-less copying device have been equipped with a film carrier (hereinafter referred to as "film carrier") that takes out the X-ray cut film from the storage magazine, inserts it into an intensifying screen, and sends it to the imaging position. The cut film feeding mechanism that transports the cut film to the film feeder (simply referred to as a carriage) was required to be made smaller, and a three-dimensional format was adopted in which the carriage was located directly above the two magazines for feeding and receiving the film. The current situation is that it is necessary to provide several locations in the film transport path that give sharp bends to the cut film. FIG. 1 is a diagram showing an example of a bent portion in the film transport path of the above-mentioned miniaturized conventional cassette telephoto copying device, in which the film _F1 is connected to the roller 1a,
By rotating 1b in the direction of the arrow, guide plates 2a, 2
In order for the guide plate 2b to be fed in the direction of the arrow C during the interval 2b and smoothly enter between the next rollers 1c and 1d, it must be curved along the inner wall of the guide plate 2b and oriented by the terminal protrusion 3 of the guide plate 2b. The strong friction of the film F ₁ on the convex portion 3 tends to generate static electricity and scratches on the surface of the film coated with the photosensitive emulsion. Further, the contact portion between the guide plate 2b and the film _F1 is not limited to the above-mentioned convex portion 3, and if a slight imbalance in the conveying force between the roller pairs 1a, 1b and 1c, 1d occurs, the film F1 will be moved to the point _F1 indicated by the dotted line. ' ₁ , the guide plate 2b is curved and strong friction is generated near the center of the guide plate 2b. Also, depending on the snapshot device, the photographed film F ₂ shown by the dotted line may be moved by arrow d.
There are many types in which the direction is reversed, and in this case, the direction is changed by the end portion 4 of the guide plate 2b, but this may cause jamming. Furthermore, if the pressing force of the pair of rollers is increased in order to ensure the conveyance force at such a bending portion of the film, a so-called desensitization phenomenon occurs in which the sensitivity of the film decreases, which adversely affects image interpretation after development. As described above, the bent portions of the film transport path in the conventional three-dimensional cassette telephoto copying apparatus not only cause scratches and static marks on the film surface that are harmful to diagnosis, but also have the drawback of reducing its sensitivity.

This invention was devised in view of the above-mentioned current situation, and is intended to eliminate the drawbacks of the conventional cassette-less snapshot device of an X-ray fluoroscopic imaging table. That is, a film carriage running track is provided that extends perpendicularly to the longitudinal direction of the top plate of the X-ray fluoroscopic imaging device and protrudes through the base of the X-ray tube device support leg located on one side of the top plate. A photographing standby position of the reciprocating film carrier is provided on the projecting end side of the track, and at this photographing standby position, a film feeding/receiving mechanism for loading and unloading the cut film into the gap between the two upper and lower intensifying screens of the film carrier is provided. The camera is engaged with the track so that the direction of transmission and reception is perpendicular to the reciprocating direction of the film carrier in a plane, and an attachment/detachment opening for a magazine for storing cut film is provided at one end of the film transmission and reception mechanism in the film transmission and reception direction. The present invention relates to a cassette-less snapshot device for an X-ray fluoroscopic imaging table, which is characterized by the following. This configuration eliminates the disadvantage of conventionally curving the cut film in order to reduce the area it occupies when transporting the cut film in the storage magazine to the carriage. A convenient device that makes effective use of the space on the side of the top plate on the supporting side of the X-ray tube device, which does not get in the way of the operator, and allows the magazine to be attached and removed near the end of the top plate in the longitudinal direction. This is what we are trying to provide.

Embodiments of this invention will be described below with reference to the drawings. FIG. 2 is an external perspective view of the X-ray fluoroscopic imaging table 11 according to the present invention, and FIG. 3 is a partial front view of the fluoroscopic imaging table 11 viewed from the direction of arrow e. The fluoroscopic imaging table main body 12 is rotatably supported on an apparatus base 14 fixed on a floor surface 13, and is rotated 90 degrees clockwise from the horizontal position shown in the figure in the direction of the arrow f with the subject placed on the top plate 15. , a standing position supported on the top plate 16, and a reverse tilting position by rotating counterclockwise in the direction of the arrow f' can perform fluoroscopic photography at any angle. In addition, an X-ray tube device 18 is supported on a support 17P installed on a support leg 17 on the side of the top plate 15, and the X-ray tube device 18 is supported in the longitudinal direction of the top plate 15 with respect to the imaging table main body 12, that is, the arrow g
The maximum stroke is the difference (ΔL=L ₁ −L ₂ ) from the overall length L ₁ of the recess of the main body 12 to the width L ₂ of the carriage holding arms 17A, 17A′ integrated with the support leg 17. , the above L ₁ is for example
If it is 150cm, L ₂ is small at about 70cm, so ΔL can be set as large as 80cm. As shown in FIG. 3, this support leg 17 aligns and supports the image tube 19 tube axis 19C on the X-ray radiation cone center axis XC, and supports the image tube 19 for transparent viewing of the subject on the top plate 15 prior to imaging. I do. In addition, the top plate 15 has a top plate slide mechanism 15S.
As a result, the main body 12 can be slid in the longitudinal direction at a maximum stroke of, for example, 150 cm in a horizontal position and 65 cm in an upright position, and can also be slid in the width direction of the main body 12. With the above configuration, an arbitrary imaging site of the object to be inspected on the top plate 15 is fluoroscopically viewed using the image tube 19, and then two X-ray cut films _F1 are placed at the imaging position 20B directly below the top plate 15. The carriage 20 held between the intensifying screens enters and takes pictures, and FIG. 2 shows the carriage 20 entering the picture taking position 20B. There are two rails 21 at the top of the carriage 20, which can be used as guides to
Two dividing masks 22 and 23 are movably provided, and the photographic film is automatically divided in conjunction with film size selection. Figure 4 shows a planar L-shaped cassette telephoto copying device 2, which is the main part of this invention.
FIG. 4 is a plan view with the cover removed to show the configuration of No. 4; The carriage 20 is moved perpendicularly to the longitudinal direction of the top plate 15 indicated by the three-dot chain line from the photographing position (25 is the center position of the cut film _F1 ) to the cut film loading/unloading position, that is, the photographing standby position 20A (26 is the cut film F1 ₎ . A reciprocating track 27, 28 mechanism (center position) is provided through the base of the X-ray tube device support leg 17. A drive motor (not shown) drives the sprocket wheels 29, 2.
9' causes the carriage 20 to reciprocate between the two positions 20A and 20B via the endless chain 30. The figure shows the cut film transfer mechanism 31 when the carriage 20 is at the film loading/unloading position 20A.
It shows the state where it is facing. This mechanism 31
The length L ₃ in the longitudinal direction of the top plate is the top plate slide mechanism 1
Since it is made to have almost the same dimensions as the 5S, the operator can slightly turn the end 15T of the top plate 15 and insert the magazine 3.
2, 33 can be attached and detached. Therefore, there is no need for a space on the back side of the X-ray fluoroscopic imaging table 11 for attaching and removing the magazine, and the X-ray fluoroscopic imaging table 11 can be placed close to the wall of the room, reducing the installation floor area. Fifth
The figure shows the -' cross section of Fig. 4.
This will be explained using figures. Supply magazine 32 containing unphotographed film F ₁ , photographed film
The receive magazine 33 that stores F ₂ is on the top plate 15
As shown in FIG. 5, it is installed (and removed) at a slight angle in the direction of arrow h, which is parallel to the longitudinal direction of . The unphotographed film F ₁ shown by the dotted line in FIG. 5 has a plurality of suction cups 3
4, is conveyed in the direction of the arrow (+YO) via the feed roller 35 and the guide plate 36, and is fed into the carriage 20. At this time, since the film _F1 is conveyed at an angle of inclination of, for example, about 15° to the horizontal plane of the carriage, the guide 3
The film is smoothly fed into the film holding and transporting mechanism 37 in the carriage 20 without being strongly rubbed by the film 6, and stopped at a predetermined position (described later). film
When F ₁ stops, a crimping mechanism (not shown) is activated to push the lower intensifying screen 38 upwards and release the film.
_F1 is pressed between it and the upper intensifying screen 39. After the film has been crimped, the carriage 20 moves along the traveling tracks 27 and 28 to the photographing position 20B under the top plate in response to the photographing preparation signal. Above orbit 2
As shown in FIG. 5, reference numeral 7 has a rectangular shape, for example, and slidably supports the large diameter threading roller 37R in the conveyance mechanism 37, and is rotated by a drive motor (not shown) to rotate the roller 37R. It is. A grit 40 is located above the upper intensifying screen 39, and the aforementioned divided masks 22 and 23 are located above it. When the X-ray exposure is completed, the carriage 20 returns to the standby position 20A, and the upper and lower intensifying screens 39,
38 is released, and at the same time, the film holding and conveying mechanism 37 is operated in the opposite direction to that at the time of supply. By this operation, the photographed film _F2 is sent out in the direction of the arrow (-YO), and the guide plate 41
It is fed into the receive magazine 33 via the feed roller 42 as shown by a dashed line _F2 . At this time, the film is transported on a gentle slope of, say, 15 degrees to the horizontal plane of the carriage.
F ₂ is not subjected to strong friction by the guide plate 41 or the like. This completes one cycle of transporting the cut film. Returning to FIG. 4, the operation of divided photographing will be explained. In other words, the Y-axis direction transport function of the film transport mechanism 37 is carried out by the magazine 3.
In addition to transporting the distance YO from the center position 43 of the inner film F ₁ to the center position 26 of the carriage 20, the center 43 is transported to the Y ₁ and Y ₂ positions. Furthermore, the moving mechanism 29, 2 of the carriage 20
The X-axis direction movement functions of 9' and 30 can move distances of X ₁ and X ₂ in addition to the standard XO. As a result, for example, you can print Cutt Film F ₁ in large square format (14 inches x 14 inches).
⑋) In case of 6 sections, you can shoot in 4 sections in case of 4-cut format. Furthermore, if the division mask is devised, it is possible to divide the image into nine parts in a large square format.

The above is an embodiment of the device of this invention, but this invention is not limited to the illustrations and explanations. For example, the stop position of the carriage can be adjusted to
For example, a fluoroscopic standby position may be provided between the two.

This idea is structured as above, so
This eliminates the drawbacks of the conventional cassette-less copying device of the film curved conveyance type on the X-ray fluoroscopy table.
Firstly, by making the carriage running direction perpendicular to the top plate and by providing a film supply section that is perpendicular to the carriage running direction, an L-shaped configuration is achieved in plan, which reduces the area occupied by the device and facilitates film storage. Easy to attach and detach the magazine. In addition, since the planar space occupied by the film transport path is on the opposite side of the top plate for the operator, it does not interfere with diagnosis. Second, not only does the entire transport path of the cut film not cause any curvature on the film, but the distance is short, and there is no occurrence of scratches, static electricity marks, or desensitization phenomena on the film that are harmful to diagnostics, and there is no chance of transporting the film by picking or picking. Does not cause defects. Thirdly, the film transport mechanism and control circuit are simplified and there is less risk of failure. Fourthly, the width of the carriage section under the top plate (L ₂ in FIG. 2) is small, and the slide stroke of the X-ray tube device in the longitudinal direction of the top plate is large, improving the diagnostic function. As described above, we have been able to provide a convenient device with a number of features.

[Brief explanation of the drawing]

Fig. 1 is a partial diagram illustrating the state of the bending part of the film in a cassette-less copying device of a conventional X-ray fluoroscopic imaging table, and Fig. 2 is an X-ray fluoroscopic imaging table incorporating a cassette-less copying device of an embodiment of this invention. 3 is a partial front view showing the installation part of the photographing stand, FIG. 4 is a plan view of the cassette telephoto copying device shown in FIG. 3, and FIG. FIG. 4 is a cross-sectional view taken along the line -' in FIG. 4; 11... X-ray fluoroscopy table, 15... Top plate, g...
...Longitudinal direction of the top plate 15, 17...X-ray tube device support leg, 20...Film carriage, 20A...Photographing standby position of the film carriage 20, 20
B... Shooting position of the film carrier 20,
27, 28...Film carriage running track, 2
7T, 28T...Protruding end of the above track, 31...Cut film sending/receiving mechanism, 39, 38...Two upper and lower intensifying screens in the carriage, _F1 ...Unphotographed cut film, _F2 ...Photographed Cut film, Y ₀
... Film sending/receiving direction, X ₀ ... Carriage reciprocating direction.

Claims (1)

[Scope of utility model registration request] An X that is perpendicular to the longitudinal direction g of the top plate 15 of the X-ray fluoroscopic imaging table 11 and located on one side of the top plate 15
Film carriage running tracks 27 and 28 are provided that protrude through the base of the wire tube device support leg 17, and the film carriage 2 reciprocates on these tracks 27 and 28.
0 photographing standby position 20A to the orbit protruding end 27
A cut film is provided on the T and 28T sides, and a cut film is placed in the gap between the two upper and lower intensifying screens 39 and 38 of the film cartridge 20 at this photographing standby position 20A.
The film feeding/receiving mechanism 31 that takes in and out F ₁ and F ₂ is
Magazines 32 and 33 are provided to be engaged with the tracks 27 and 28 so that the film sending and receiving direction Y ₀ is perpendicular to the reciprocating direction X ₀ of the film carriage, and the magazines 32 and 33 store the cut films F ₁ and F ₂ . A cassette telephotography apparatus for an X-ray fluoroscopic imaging stand, characterized in that a loading/unloading port is provided at one end of the film transmitting/receiving mechanism 31 in the film transmitting/receiving direction _Y0 .