JPH0418288B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a cassette-less X-ray fluoroscopic imaging table, and more particularly to a cassette-less X-ray fluoroscopic imaging table equipped with a snapshot device having a suitable film feeding mechanism.

BACKGROUND ART For example, as shown in FIG. 1, a conventional cassette-less X-ray fluoroscopic imaging table has a table support frame 2 rotatably supported by a support base 1, with a top plate 3 guided so as to be vertically and horizontally movable sandwiched therebetween. An X-ray tube device 5 is placed above and a snapshot device 6 is placed below. X-ray television 8 via image intensifier 7 attached to
The structure is such that an X-ray image can be obtained. The quick-shooting device 6 takes out a large number of unshot films stored in a supply magazine one by one, and releases the films as appropriate by using an operation switch operated by the operator.
Move to the center of the radiation field and obtain an X-ray photograph of the subject 4.

In order to obtain an X-ray photograph, a film is sandwiched between intensifying screens, brought into close contact with each other, and X-rays are irradiated.Then, the contact is released, the photographed film is taken out from between the intensifying screens, and the film is transported. A mechanism for storing it in a storage magazine is required. FIG. 2 shows the general configuration thereof, and is a side view of the snapshot device 6 shown in FIG. 1.

In FIG. 2, a large number of unphotographed films 10 in a supply magazine 9 are stored in a stack, and a suction pad 11 located above the stack is connected to a vacuum pump (not shown) to pick up the topmost one of the stacked films. Only the sheet is suctioned, and the suction pad 11 sucks the sheet until its tip is bitten by the first conveying roller 12, and then the sheet is moved by a moving mechanism (not shown). When it is detected that the leading edge of the film is caught in the first conveyance roller 12, the first conveyance roller 12 is rotated by a conveyance motor (not shown).
The film is transported in the direction of the second transport roller 13.
The film is conveyed via the second conveyance roller 13 between a front intensifying screen 14a and a back intensifying screen 14b fixed to the film holder 14, and the rear end in the conveying direction is aligned with the end of the intensifying screens 14a and 14b. When a match is detected, the transport motor stops and the intensifying screen 1
4a, 14b and the film are brought into close contact,
Preparation for line photography is complete. In this state, the surgeon performs fluoroscopy, and takes appropriate snapshots during the fluoroscopy. At this time,
The film holder 14, which is ready for radiography, is moved to the radiography position Q shown in FIG. 2, and X-rays are irradiated to take a picture. After photographing is completed, the film holder 14 is returned to the preparation position P again. When the film holder 14 is returned to the preparation position P, the intensifying screens 14a and 14b are released from close contact with the film, and the photographed film caught in the second transport roller 13 is moved by the reverse rotation of the transport motor. The film is carried out from the film holder 14. The unloaded film is guided by the third conveyance roller 15 and the film guide 17, and then the first conveyance roller 1
It does not move in two directions, but moves along the film guide 17 in the direction of the fourth conveyance roller 16. The photographed film 18 sent out from the fourth conveyance roller 16 is
The images are stacked and stored in the storage magazine 19, and developed as appropriate.

However, the above-mentioned conventional technology has the following problems.

(1) Since the first to fourth conveyance rollers are required,
Too many transport rollers.

(2) Since it is necessary to rotate the second conveyance roller at the entrance of the film holder in forward and reverse directions, the control circuit becomes complicated.

(3) Since a film guide is required for transporting the film, there is a risk of scratches on the film surface during transport, and there is also a risk of static marks forming during dry periods.

(4) Since the second conveyance roller at the entrance of the film holder is used for loading and unloading, unexposed film cannot be conveyed until after exposed film has passed through the second conveyance roller, which increases the time required to advance the film. , diagnosis is time consuming and inefficient.

Therefore, it is possible to increase the film transport speed, but this has the problems mentioned in (3) above, and there is also the risk of transport failure due to the weak elasticity of the film, which leads to problems with reliability. leading to a decline.

(5) Since a film guide and a group of transport rollers are required, the distance from the rear end of the film in the supply magazine to the rear end of the film in the film holder becomes long. That is, the overall length of the snapshot device increases, and the weight and other factors also increase. Furthermore, the assembly process takes longer to manufacture and increases costs.

(6) A film detector is required at each conveyance roller position, and its control circuit is complicated.

Purpose The purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art, to provide a cassette-less X-ray fluoroscopic photographing table having a good X-ray image recording medium conveyance mechanism, and equipped with a downsized quick copying device. It is about providing.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Summary of the Invention A brief overview of typical inventions disclosed in this application is as follows.

In other words, in a snapshot device, the number of transport rollers, film guides, etc. in contact with the surface of the X-ray image recording medium (hereinafter simply referred to as film) is minimized, thereby shortening the film transport distance and minimizing bending of the film. Therefore, the transport rollers that carry the film into and out of the film holder are arranged as a single drive roller and idle rollers (hereinafter referred to as idle rollers) above and below it, separating the loading and unloading positions, and the film is caught by the roller at that position. The film holder is configured to be tiltable in order to allow the film to be inserted.

Configuration The configuration of the present invention will be explained together with examples.

3 to 8 are diagrams showing the schematic configuration of Embodiment 1 of the snapshot device of the present invention. Components having the same functions as those in FIG. 2 are given the same reference numerals, and repeated explanations thereof will be omitted. .

In FIGS. 3 to 8, reference numeral 20 denotes a film transport drive roller (hereinafter referred to as a drive roller), which holds the unphotographed film 10 transported from the supply magazine 9 by the suction pad 11 into the film holder. 22. 21 is a carry-in idle roller, which is similar to the drive roller 20.
is provided on the top of the screen so as to be in contact with it.
Reference numeral 22 denotes a film holder (hereinafter referred to as holder), which includes an upper contact plate (hereinafter simply referred to as upper frame) 22a to which a front intensifying screen 22b is attached and a lower contact plate (hereinafter simply referred to as upper frame) to which a back intensifying screen 22d is attached. (hereinafter simply referred to as a lower frame) 22c, whose end opposite to the drive roller 20 is rotatably supported by a fixed frame 24 by a fixed pin 23. The upper frame 22a and the lower frame 22c
As shown in FIG. 8, both ends of the film loading/unloading side are cut out so that the driving rollers 20 can be placed therein. Reference numeral 25 denotes a carry-out idle roller, which is provided below the drive roller 20 so as to be in contact with it. Reference numeral 26 denotes a film guide plate for guiding the photographed film to the storage magazine 19.

9 to 13 are diagrams for explaining an embodiment of a mechanism for driving the upper and lower frames of the holder shown in FIG. 3, and FIG. 9 shows the phases of the upper and lower frame cams and FIG. 10 is a diagram showing the relationship between displacements, and FIG. 10 is a diagram showing the shapes of the upper frame cam and lower frame cam having the phases and displacements shown in FIG. 9. FIGS. 11 to 13 are diagrams showing the upper and lower frame moving cam mechanisms. It is a figure showing a schematic structure. In FIGS. 9 to 13, parts having the same functions as those in FIGS. 3 to 8 are given the same reference numerals, and repeated explanations thereof will be omitted.

In FIGS. 9 to 13, 27 is the holder 2.
An upper frame cam 28 moves the upper frame 22a of the holder 22, and a lower frame cam 28 moves the lower frame 22c of the holder 22, each having a shape as shown in FIG. This upper frame cam 27 and lower frame cam 28
are fixed to the same shaft 29 in phase alignment and connected to a rotating shaft of a motor (not shown). 27a and 28a are cam followers corresponding to the upper frame cam 27 and lower frame cam 28, and the lever 2
7b and 28b, respectively. The levers 27b, 28b are rotatably supported by a shaft 30, and the cam followers 27a, 28a follow the radial displacement caused by the rotation of the upper frame cam 27 and lower frame cam 28. Push rods 27c and 28c are pivotally supported at one end of the levers 27b and 28b, and swing as the levers 27b and 28b move.
Pull roller 27 provided at the tip of c, 28c
The upper frame guide 22e and the lower frame guide 22f are configured to be pushed down by the upper frame guide 22e and the lower frame guide 22f.

Next, the operation of this embodiment will be explained.

A large number of unphotographed films stored in a stack in the supply magazine 9 are picked up by the suction pad 11, and only the top one of the stack is adsorbed.
The suction pad 11 moves until the tip of the film 10 is caught, and when the unphotographed film 10 is caught, the vacuum of the suction pad 11 is released. The moved unphotographed film 10 is moved between a front intensifying screen 22b fixed to the upper frame 22a of the holder 22 and a back intensifying screen 22d fixed to the lower frame 22c by a drive roller 20 driven by a motor. As shown in FIG. 3, they are brought into close contact with each other. Here, the above-mentioned adhering means (not shown) can also be achieved by mechanical crimping methods such as plate springs or torsion springs, but vacuum suction is effective and also effective in reducing weight. It is.

Next, while the holder 22 remains in close contact with the quick-shot imaging preparation position P, the fluoroscopic image of the subject is observed by the operator, and when the operator turns on the quick-shot operation switch of the operating device at an appropriate time, the holder 22 22 quickly moves rightward from the position P and is placed at the center position (imaging position) Q of the X-ray irradiation field indicated by the two-dot chain line, where X-rays are irradiated and imaging is performed. When this photographing is completed, the holder 22 is moved to the left again. At this point, the snapshot shooting ends, but the holder 2
2 moves further to the left while holding the photographed film 18 between them, it will be caught again by the drive roller 20 and the carry-in idle roller 21.
It stops once at a position approximately 30 mm before being bitten (see FIG. 4), and engages with the tilting drive portion of the holder 22. That is, the tilting drive unit pull rollers 27d and 28d engage with the upper frame guide 22e and the lower frame guide 22f provided on the holder 22, respectively. As shown in FIG. 11, in the holder tilt movement drive section, cam followers 27a and 28a corresponding to the upper frame cam 27 and lower frame cam 28 fixed to the shaft 29 are fixed to levers 27b and 28b, respectively. ,
These levers 27b, 28b swing following the radial displacement of the cam as the cam rotates about the shaft 30, and the push rods 27c, 28c move downward. This allows pushrods 27
Pull roller 27 fixed to the tip of c, 28c
The upper frame guide 22e and lower frame guide 22f of the holder 22, which are engaged with the upper frame guides d and 28d, are pushed down. That is, when the shaft 29 is rotated approximately 135 degrees counterclockwise (in the direction of arrow A shown in FIG. 11) by the motor,
As the levers 27b and 28b both rotate counterclockwise around the shaft 30, the push rod 27
Since the upper and lower frames 22a and 28c are lowered, the upper and lower frames 22a and 22c are lowered together by the pull rollers 27d and 28d provided at their tips.

Here, when the holder 22 is further moved to the left, the exposed film 18 is caught in the drive roller 20 and the unloading idle roller 25, and the movement of the holder 22 is stopped at the position shown in FIG. 12 (or FIG. 5). . At this position, when the shaft 29 is further rotated approximately 90 degrees counterclockwise (in the direction of arrow A shown in FIG. 11) and stopped, the lower frame cam 28 does not move in the radial direction. Only the frame 22a moves upward, and the close contact between the intensifying screens 22b and 22d and the photographed film 18 is released, resulting in the state shown in FIG. 13. In this state, when the drive roller 20 is rotated, the photographed film 18 is carried out by the drive roller 20 and the carry-out idle roller 25 and stored in the storage magazine 19, as shown in FIG. At the same time, the unphotographed film 10 attracted to the suction pad 11 is caught between the drive roller 20 and the carry-in idle roller 21, and at that moment the vacuum of the suction pad 11 is released and the film is carried in. That is, the operation of ejecting the photographed film 18 from the holder 22 and the operation of loading the unphotographed film 10 into the holder 22 are performed simultaneously.

In this manner, the unphotographed film 10 is carried in while the photographed film 18 is being carried out from the holder 22, and when the carrying is completed, the driving roller is stopped. Then, when the shaft 29 is further rotated counterclockwise (in the direction of the arrow) by about 135 degrees, the push rod 28c of the lower frame 22c moves upward, and as shown in FIG. The vacuum pump (not shown) is now ready for close contact.
With this, the two are brought into close contact and preparation for the next snapshot is completed. Thereafter, the above operation is repeated.

Although not shown, the loading of the unphotographed film 10 is completed by detecting the final end of the unphotographed film 10 in the transport direction when the unphotographed film 10 is carried into a predetermined position in the holder 22. Check it. In addition, the intensifying screen 22 inside the holder 22
Even if the film size is smaller than 22b and 22d, one end is always aligned with the edge of intensifying screens 22b and 22d, so if a multi-sized storage magazine and ejecting mechanism are provided, a multi-channel cassette telephoto device can be used. is also possible.

As described above, the holder consisting of the upper frame, the lower frame, and the fixed frame can provide all the functions of the conventional film transport section.

FIG. 14 is a diagram showing a schematic configuration of an embodiment of the snapshot apparatus of the present invention. Components having the same functions as those in FIGS. 11 and 3 are given the same reference numerals, and repeated explanation thereof will be omitted.

In this embodiment, a top plate 3 that supports a subject 4 while lying down is used.
A snapshot device 6 is placed above and an X-ray tube device 5 is placed below. 7, the beam enters an X-ray television 8, and an X-ray image is obtained. The so-called under-table tube method
Embodiment 1 shown in FIG. 3 is applied to a fluoroscopy table. That is, if the snapshot apparatus having the film transport mechanism of the above embodiment is adopted as is, a space for a holder tilting drive mechanism and a space for moving the holder will be required in the section B shown in FIG. If the drive mechanism is devised, it is possible to arrange it above the holder, but it is difficult to provide enough space for moving the holder. The portion B cannot be extended due to the dimensions of the lower part of the storage magazine in order to bring the subject and the film closer together and to provide space for the subject 4 to move. Therefore, by tilting the holder 22 upward, a space B can be provided, and the third
It can function in the same way as shown in FIGS. 13 to 13.

Next, the operation of this embodiment will be explained.

In contrast to the overtable tube system of the above embodiment, the frame on the X-ray tube device 5 side of the holder 22 will be described as an upper frame 22a, and the opposite side thereof as a lower frame 22c. That is, the side to which X-rays are first irradiated is the upper frame or front.

FIG. 14 shows the holder 22 returning to the preparation position P for quick-shot imaging after irradiating X-rays at the center position Q of the X-ray irradiation field indicated by the two-dot chain line and completing the imaging. ing.

In FIG. 14, the photographed film 18 is caught between a drive roller 20 and an unloading idle roller 25. As shown in FIG. In this state, the lower frame 22c is
The photographed film 18 is stored in the storage magazine 19 by moving the intensifying screen (not shown) upward and releasing the close contact between the photographed film 18 and the driving roller 20 in a clockwise direction. . At the same time, the unshot film 1 is separated into pieces by the suction pad 11 and taken out from the supply magazine 9.
0 is the drive roller 20 and the carry-in idle roller 21
, the drive roller 20 is rotated clockwise, and the drive roller 20 is carried into the holder 22. When the unphotographed film 10 is set in the holder 22, the drive roller 20 is stopped, and the upper frame 22a is moved to a position C shown by a two-dot chain line to bring the intensifying screen into close contact with the unphotographed film 10. The holder 22 is returned to the position shown by the solid line, and the preparation for snapshot photography is completed. However, in this embodiment, in order to transport the holder 22 from the imaging preparation position P to the imaging position Q, the holder 22 must be returned to the horizontal position at the position shown in FIG.
Alternatively, it becomes necessary to operate the cam mechanism while transporting the holder 22. Thereafter, the above operation is repeated.

FIG. 15 is a diagram showing a schematic configuration of an embodiment of the snapshot apparatus of the present invention. Components having the same functions as those in FIG. 14 are given the same reference numerals, and repeated explanation thereof will be omitted.

As shown in FIG. 15, this embodiment uses a transport mechanism for a sheet that obtains an image without using an intensifying screen, such as a sheet for accumulating and recording an X-ray image (hereinafter referred to as an accumulation sheet). A film transport mechanism is applied.

That is, in the same way as in the embodiment, one sheet is taken out from the supply magazine 9 in which a large number of accumulation sheets 10 which have not been exposed to X-rays are stored in a stack, and is caught by the drive roller 20 and the carry-in idle roller 21, and then placed in the upper frame 22a. into the holder in which the lower frame 22c is tilted upward, and then the lower frame 2
2c is moved downward and the unphotographed accumulation sheet 10a is sandwiched therebetween, and preparation for quick photographing is completed. After photographing is completed, both the upper frame 22a and the lower frame 222c are tilted upward, and the photographed storage sheet 18a is caught between the drive roller 20 and the carry-out idle roller 25.
If the upper frame 22a is moved downward to release the hold on the lower frame 22c and the drive roller 20 is rotated counterclockwise, the transport rollers 25a,
It is stored via 25b. Thereafter, the above operation is repeated.

As explained in the above embodiment, by moving the upper and lower frames of the holder, the conveyance path can be made straight, thereby minimizing deterioration of image quality such as scratches on the surface of not only films but also sheets with little flexibility. A transport system can be obtained. Furthermore, by reducing the number of transport rollers, the film or sheet transport path can be shortened.

Furthermore, although the over-table tube method and the under-table tube method have been explained with the holder operating directions being reversed, this also changes depending on the arrangement of the magazine and holder, and even though these methods are used, the The direction of movement cannot be determined uniquely.

Effects As explained above, according to the novel technical means disclosed in the present application, the following effects can be obtained.

(1) Since the film is transported without bending it, it is possible to prevent scratches from occurring on the surface.

(2) Since the number of guide rollers is reduced, it is possible to prevent impressions, static marks, etc. from occurring on the surface of the film, etc.

(3) The transport distance for film, etc. has been shortened, so it can be transported in approximately 1/2 the time compared to conventional devices.

(4) Since the unphotographed film and the photographed film are transferred to and from the film holder at the same time, the photographing interval can be shortened.

(5) Since the transport roller group and film guide are no longer necessary, the entire snapshot device can be made smaller.
Moreover, it is possible to reduce costs.

(6) Since the film transport drive roller is rotated only in one direction, the control mechanism can be simplified.

(7) Since the position of the film, etc. needs to be detected only at one predetermined location on the film, etc.
The position detection control mechanism for film, etc. can be simplified.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of a conventional cassette-less X-ray fluoroscopic photographing table, FIG. 2 is a diagram illustrating problems with the film transport mechanism of a conventional snapshot device, and FIGS. 3 to 8 9 to 13 are diagrams illustrating an embodiment of a mechanism for driving the upper and lower frames of the holder shown in FIG. 3; Figure 14 shows
FIG. 15 is a diagram showing a schematic configuration of an embodiment of a snapshot apparatus of the present invention. FIG. 15 is a diagram showing a schematic configuration of an embodiment of a snapshot apparatus of the present invention. 9...Supply magazine, 10...Unshot film, 10a...Unshot accumulation sheet, 11...Suction pad, 18...Exposed film, 18a...Exposed accumulation sheet, 20...Drive roller, 21... …
Carrying idle roller, 22...Holder, 22a...
...Top frame, 22b...Front intensifying screen, 22c...
Lower frame, 22d... Back intensifying screen, 22e... Upper frame guide, 22f... Lower frame guide, 23... Fixed pin, 24... Fixed frame, 25... Unloading idle roller, 26... Photographed film Guide plate, 27... Upper frame cam, 28... Lower frame cam, 27a, 28a...
Cam follower, 27b, 28b...Lever, 27
c, 28c... Pushrod, 27d, 28d
...Pull roller, 29, 30...Axle.

Claims (1)

[Scope of Claims] 1. An X-ray image medium holder that sandwiches an X-ray image recording medium, and an X-ray image recording medium from a supply magazine that is
A cassette-less X-ray fluoroscopic photographing table comprising: a transport drive means for supplying an X-ray image medium to a ray image medium holder and discharging the X-ray recording medium in the X-ray image medium holder after imaging has been completed to a storage magazine; It consists of a conveyance drive roller that rotates only in one direction, and a first idler roller and a second idler roller that abut the conveyance drive roller, respectively, and the first idler roller and the second idler roller are each driven by the conveyance drive roller. The X-ray image recording medium holder is arranged such that a first common tangent line and a second common tangent line formed with the rollers intersect with each other, and the X-ray image recording medium holder comprising a first contact plate and a second contact plate that are rotatably supported near the area and can swing independently within a range including the first common tangent line and the second common tangent line; Swinging of the second contact plate to the first contact plate positioned on the first common tangential side when the recording medium is fed between the conveyance drive roller and the first idle roller, and the second contact plate is brought into close contact with each other after photography is completed. Swinging for positioning the first contact plate and the second contact plate on the second common tangent line, and simultaneously discharging the photographed X-ray image recording medium between the conveyance drive roller and the second floating roller, and simultaneously removing the unphotographed X-ray image. In order to receive the supply of the linear image recording medium between the conveyance drive roller and the first idle roller, the first contact plate of the first contact plate is positioned on the second common tangent line.
A cassette-less X-ray fluoroscopic imaging table characterized by being equipped with a contact plate swinging mechanism that sequentially and repeatedly swings toward a common tangential side.