JPH0526582Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to an X-ray rapid photography apparatus that performs cassette-less rapid photography and cassette-based rapid photography.

B. Prior Art Conventionally, as this type of X-ray rapid photography device, the fifth
A device as shown in the figure is known.

As shown in this figure, the X-ray quick photography device 6 is
It is provided at the bottom of a photographing table 3 which has a top plate 2 on its upper surface on which the subject M is placed. The X-ray flash photography device 6 includes a sheet supply magazine 11 that stores X-ray sensitive sheets (hereinafter simply referred to as sheets) that have not yet been photographed, a sheet storage magazine 10 that stores photographed sheets, and these magazines 10, 11, and transports the sheet from the delivery/reception position to the photographing position.
and a snapshot frame 8 that accommodates the transfer mechanism.

A cassette insertion slot 9 for inserting and removing a cassette 16 loaded with sheets is formed between the snapshot frame 8 and the top plate 2 on the front part of the photographing stand corresponding to the photographing position. A cassette 16 is inserted through the insertion opening 9, and during cassetteless photography, the sheet carriage 30 is moved back and forth with the cassette 16 taken out. Note that in the figure, reference numeral 1 is an X-ray tube that irradiates X-rays toward the subject M.

C. Problems to be Solved by the Invention However, the above-mentioned conventional device has the following problems.

Since the cassette insertion opening 9 is formed between the snapshot frame 8 and the top plate 2, the distance L _A between the object to be photographed and the sheet when photographing with a cassette does not match the distance L _B when photographing without a cassette. For this reason, there is a problem in that the resolution of the X-ray photograph decreases and the image quality deteriorates in the sheet carriage located at a distance L from the region to be imaged.

In addition, in order to avoid this problem, there is a device that is provided with a drive unit that moves the X-ray snapshot device up and down to match the distances during cassette-less imaging and cassette-based imaging. Since the entire device must be moved up and down in order to insert the X-ray photographic device, there are problems in that the entire X-ray photographing device becomes large in size and has a complicated structure.

This idea was made in view of these circumstances, and by guiding the cassette to the shooting position within the snapshot frame, the device is made smaller and simpler, and it is possible to perform cassette shooting and cassette telephoto shooting. It is an object of the present invention to provide an X-ray speed photographing apparatus that can take X-ray photographs of good image quality in both photographing conditions.

D. Means for Solving the Problems This invention has the following configuration in order to achieve the above object.

That is, the X-ray rapid photography device according to this invention is
Equipped with a quick-shot frame housing a sheet carrier that moves back and forth between the X-ray-sensitive sheet delivery and receiving position and the imaging position, and a removable cassette loaded with another X-ray-sensitive sheet, it is capable of cassette-less quick-shot photography and cassette-less photography. In the X-ray rapid photography equipment that performs
forming a cassette insertion opening for inserting and removing the cassette at a location corresponding to the photographing position of the snapshot frame;
Of a pair of guide rails for guiding the cassette inserted from the cassette insertion slot to the imaging position so that the X-ray sensitive sheets are at approximately the same height in both imaging, one is provided within the snapshot frame, and the other is provided in the photographic frame. A seat provided on the side surface of the sheet carriage on the photographing position side, and for adjusting the distance between the two guide rails by moving the sheet carriage so that the cassette is guided to the photographing position by the two guide rails when the cassette is photographed. It is characterized by being equipped with a carriage movement control means.

E action The effects of this invention are as follows.

That is, when performing cassette photography, the sheet carriage movement control means controls the movement of the sheet carriage so that the guide rail installed within the snapshot frame and the guide provided on the side surface of the sheet carriage are controlled. The distance from the rail is adjusted so that the cassette can be guided. Then, when the cassette is inserted into the quick-shooting frame through the cassette insertion opening formed on the side of the quick-shooting frame, the cassette is guided by the guide rail and placed at the shooting position.

Also, when taking snapshots without using a cassette tape,
With the cassette taken out outside the snapshot frame, the sheet carrier is moved back and forth between the delivery/reception position and the photographing position.

Thus, in both imaging conditions, the X-ray sensitive sheet in the cassette and the X-ray sensitive sheet in the sheet carriage are respectively installed at the same height at the imaging position.

F. Example Hereinafter, an example of this invention will be described based on the drawings.

First, the overall configuration of an X-ray fluoroscopic imaging apparatus will be described with reference to FIG.

An X-ray tube 1 for irradiating X-rays and an X-ray image intensifier eye 5 for fluoroscopy are arranged facing each other so as to sandwich an imaging table 3 which is attached to a base so as to be tiltable and rotatable. ing. The photographing table 3 is provided with a top plate 2 on which a subject (not shown) is placed and which moves in the horizontal direction, and an X-ray snapshot photographing device 6.
A cassette insertion opening 9 for inserting and removing a cassette 16 is formed in the front portion of the imaging platform 3 corresponding to the imaging position B.
A similar structure is also formed in the quick-shot frame 8 of the X-ray quick-shot photographing device 6. A magazine rack 7 is provided on the opposite side of the snapshot frame 8 from the photographing position B to which a sheet supply magazine 11 for storing unphotographed X-ray sensitive sheets and a sheet storage magazine 10 for storing photographed sheets are attached. .

The configuration inside the quick-shot frame 8 of the X-ray quick-shot imaging device 6 will be explained with reference to FIGS. 2 and 3. FIG. 2 is a partially cutaway plan view, and FIG. 3 is a perspective view of the inside of the snapshot frame 8 as seen from the rear side of the apparatus.

A sheet carriage 30 is housed within the snapshot frame 8, which transfers sheets to each magazine 10, 11 provided in the magazine rack 7, and moves back and forth between a sheet transfer position A and a photographing position B. has been done.

A carriage guide rail 20 having a U-shaped cross section for guiding the reciprocating movement of the sheet carriage 30 is provided at the lower part of the inner wall of the front side of the snapshot frame 8.
The guide rail 20 is fitted in the longitudinal direction of the guide rail 20. A roller (not shown) is provided to roll in the groove of the guide rail 20.
The support plate 31 at the bottom of the sheet carriage 30
The support plate 31 is connected to a drive belt 15 that is stretched between a motor 12 capable of rotating in both directions and a driven pulley 22. The amount and direction of rotation of the motor 12 is controlled by a movement control section 33 that serves as a sheet carriage movement control means.

A guide rod 13 having a rectangular cross-section for guiding the reciprocating movement of the sheet carriage 30 is attached in the longitudinal direction to the rear lower part of the snapshot frame 8. The guide rod 13 passes through the rear part of the sheet carriage 30 and is also used as a shaft for rotating the sheet feed roller 23 provided inside the sheet carriage 30. The guide rod 13 is rotatably supported by bearings 24 and 32 at both ends thereof, and is rotationally driven by a motor 25 connected to one end thereof.

A guide rail 14a, one of a pair of cassette guide rails, for guiding a cassette 16 inserted from the cassette insertion opening 9 to the photographing position is provided at the upper part of the wall surface of the snapshot frame 8 on the photographing position side. The cassette guide rail 14a has a U-shaped cross section, and has a plurality of rolling rollers 21 on the lower protruding part for smooth insertion of the cassette 16, and a lateral side of the cassette 16. A plurality of lateral vibration prevention rollers (not shown) for preventing vibration are each supported along the longitudinal direction of the rail. In addition, a motor 2 is installed on the guide rail 14a in order to electrically insert the cassette 16.
A drive roller 27 is provided which rotates forward and backward at 8.

The other guide rail 14b of the pair of cassette guide rails is attached to the side surface of the sheet carriage 30 on the photographing position side. The guide rail 14b has an "inverted L"-shaped cross section, and a plurality of rolling rollers 26 are provided in the rail 14b in the longitudinal direction.

Note that the guide rails 14a and 14b mentioned above
The X-ray sensitive sheet in the cassette 16 is provided at approximately the same height as the X-ray sensitive sheet in the sheet carriage 30.

As shown in FIG. 2, on the outer wall near both ends of the cassette insertion slot 9 formed in the snapshot frame 8, there are two guide plates 19 that protrude slightly toward the outside.
are attached, and these guide plates 19 guide the cassette 16 into the cassette insertion opening 9.

The cassette 16 according to this embodiment is housed in a cassette tray 17.
Both side portions of 7 are shaped to follow the above-mentioned cassette guide rails 14a and 14b, respectively.

Next, the operation of the above-mentioned X-ray speed photographing apparatus 6 will be explained with reference to FIG. 4.

FIG. 4a shows a state in which the sheet carriage 30 has been retracted to the sheet transfer position.

At this transfer position A, sheets are transferred between the sheet storage magazine 10 and the sheet supply magazine 11, which are not shown in FIG. When a sheet is supplied from the sheet supply magazine 11, the movement control section 33 rotates the motor 12. Due to the rotation of the belt 15 accompanying this, the sheet carriage 30 is transferred to the photographing position B.

FIG. 1B shows a state in which the sheet carriage 30 has reached the photographing position B. FIG.

When X-ray imaging is performed at this imaging position, the sheet carriage 30 returns to the delivery/reception position A and stores the photographed sheet in the sheet storage magazine 10. In this manner, cassette-less snapshot photography is performed by reciprocating the sheet carriage 30.

Figure c shows a photographing state using the cassette 16.

As shown in this figure, when performing cassette photography, the movement control unit 33 controls the amount of rotation of the motor 12 to move the sheet carriage 30 and move the cassette guide rail 14 provided within the snapshot frame 8.
The sheet carriage 30 is installed at the cassette guide position C so that the distance between the cassette guide rail 14b and the cassette guide rail 14b attached to the side surface of the sheet carriage 30 matches the width of the cassette tray 17. Then, insert cassette 1 from cassette insertion slot 9.
Insert the cassette tray 17 containing 6. When the cassette tray 17 reaches the position of the drive roller 27, the cassette tray 17 is automatically placed at the photographing position B by the rotation of the drive roller 27. When the cassette 16 finishes taking a single image, the drive roller 27 rotates in the opposite direction to move the cassette tray 17 out of the cassette insertion opening 9. By grasping the handle 18, pulling the cassette tray 17 from the snapshot frame 8, and setting a new cassette 16 in the cassette tray 17, the cassette becomes ready for photography again.

In this way, the cassette 16 can be installed at the photographing position B at the same height as the sheet carriage 30 by being guided by the guide rails 14a and 14b provided on the side surface of the sheet carriage 30 and within the snapshot frame 8. I can do it.

In the above-described embodiment, the cassette 16 is automatically placed at the photographing position by the drive roller 27, but this may be done manually.

Further, in the above embodiment, the cassette 16 is placed on the cassette tray 17, but the cassette 16 may be directly inserted.

Further, the present invention can also be applied to applications such as X-ray photography by storing an imaging plate in a cassette tray.

G. Effects of the invention As is clear from the above explanation, the X-ray photographic device according to this invention has a structure in which one side of the guide rail for guiding the cassette inserted into the photographic frame to the photographing position is provided on the sheet carrier. Therefore, the X-ray sensitive sheet in the cassette and the X-ray sensitive sheet in the sheet carriage can be installed at the same height at the imaging position without interfering with the reciprocating movement of the sheet carriage. Therefore, X-ray photographs of good image quality can be obtained in both the cassette imaging and cassetteless imaging states.

In addition, by loading the cassette into the snapshot frame, the X-ray photography device can be made more compact, and there is no need to provide a drive unit to move the X-ray photography device up and down, which is required in the past, simplifying the structure. It can also be converted into

[Brief explanation of the drawing]

1 to 4 relate to an embodiment of this invention, in which FIG. 1 is a front view showing the schematic configuration of an X-ray fluoroscopic imaging device, and FIG. 2 is a partially broken top view of the X-ray rapid imaging device. 3 are internal perspective views thereof, and FIG. 4 is a sectional view illustrating the operation of the seat carriage.
Further, FIG. 5 is a front view of a conventional X-ray snapshot photographing apparatus. 6... X-ray snapshot photographing device, 8... Rapid photography frame, 9...
...Cassette insertion slot, 14a, 14b...Guide rail for cassette, 30...Sheet carriage, 3
3...Movement control unit.

Claims (1)

[Scope of utility model registration request] Equipped with a snapshot frame that houses a sheet carrier that moves back and forth between the X-ray sensitive sheet transfer position and the imaging position, and a removable cassette loaded with another X-ray sensitive sheet, it is capable of cassette-less quick photography and cassette-based photography. A cassette insertion opening for inserting and removing the cassette is formed at a location corresponding to the imaging position of the rapid imaging frame, and the X-ray sensitive sheet is placed at approximately the same height in both imaging operations. Of a pair of guide rails that guide the cassette inserted from the cassette insertion slot to the photographing position, one is provided within the snapshot frame, and the other is provided on the side surface of the sheet carrier on the photographing position side. An X-ray snapshot imaging device characterized by comprising a sheet carriage movement control means for adjusting the interval between both guide rails by moving the sheet carriage so that the cassette is guided to the imaging position by both guide rails. .