JPH087397Y2 - X-ray equipment - Google Patents

Description

[Detailed description of the device] A. Industrial field of application This device is designed for continuous cassette shooting of the X-ray sensitive sheet to the shooting position, and one X-ray sensitive sheet of each size for each shooting position. The present invention relates to an X-ray imaging apparatus having an imaging mechanism for performing cassette imaging when loaded in a cartridge.

B. Prior Art An example of this type of X-ray imaging apparatus is shown in FIG. FIG. 5 (a) is its front view, and FIG. 5 (b) is its side view.

Two arms 2 and 2 extend toward the front from both sides of a frame pedestal 1 erected on the floor, and a top plate 3 on which a subject (not shown) is placed is supported by the arms 2 and 2. Has been done.

An X-ray tube 4 that irradiates X-rays is provided on the upper side of the top plate 3 and an imaging mechanism 5 that exposes the transmitted X-rays to an X-ray sensitive sheet (hereinafter referred to as a film) is installed on the lower side. An image intensifier 6 for converting the transmitted X-rays into a visible light image is integrally installed next to the photographing mechanism 5, and not only X-ray photographing using a film but also X-ray fluoroscopy is possible. It is configured.

The photographing mechanism 5 and the image intensifier 6 move in the front-rear direction toward the front by sandwiching the frame 7 with the ball bearing 8 protruding from the frame mount 1, and at the same time the frame 7 is parallel to the top plate 3. The laid linear bearing units 9 and 9 are configured to move in the left-right direction. Further, the imaging mechanism 5 and the image intensifier 6 are opposed to each other with the support arm 10 connecting the X-ray tube 4 and the imaging mechanism 5 and the image intensifier 6 with respect to the position of the X-ray tube 4 with the center of movement therebetween. While moving forward and backward.

By these movements in the front-rear and left-right directions, tomography with the cutting center as the cutting center is performed. This is an imaging method called a linear trajectory type tomography, and the X-ray imaging apparatus is configured to be capable of performing a curved trajectory type tomography in addition to this. The curved orbit method is a method in which the X-ray tube 4 and the imaging mechanism 5 perform tomography while drawing a circular orbit, a spiral orbit, and the like with the center of rotation as a fulcrum.

Next, the photographing mechanism 5 will be described with reference to the simplified side view of FIG.

An insertion port 11 for inserting a cassette tray, which will be described later, is formed in the upper part A of the photographing mechanism 5 in a state of opening toward the front. Below the insertion port 11, an unphotographed film and a photographed film are formed. The sheet carriage 12 that transfers the document to and from is waiting.

In the lower part B of the photographing mechanism 5, a film magazine 13 containing unphotographed films and photographed films is horizontally inserted from the front, and the films are transferred to the sheet carriage 12 at the photographing position through rollers 14 and the like. It is configured to continuously feed and perform rapid shooting of the cassette.

Next, the cassette photographing by the photographing mechanism 5 will be described with reference to the perspective view of FIG.

The cassette sandwiches and holds one sheet of film, and there are various sizes of cassettes according to the size of the film. In FIG. 3, reference numeral 15 is a cassette for half-cutting that accommodates a "half-cut size (14 x 17 inch)" film, and reference numeral 16 is a "large-angle size (14 x 14 inch)" film. It is a large angle cassette that stores.

In addition to this, a continental cassette that stores "continent size (11 x 14 inch)" film, "quarter size (10 x 12 in)
ch) ”film cassettes for storing the film. Currently, the largest size cassette is the half-cut cassette
Is 15.

These cassettes are uniformly stored in the cassette tray 17. That is, the cassette tray 17 has a capacity to accommodate at least the half-size cassette 15 of the maximum size so that the cassette of any size can be accommodated, and when the cassette of a size smaller than that, for example, the large-angle cassette 16 is accommodated. A pair of pressing plates 18 for positioning this at the center position is provided.

Such a cassette tray 17 is provided on both sides of the inner side surface of the insertion opening 11 formed in the photographing mechanism 5.
X-ray imaging is performed using films of various sizes by guiding the imaging position in the imaging mechanism 5 by 19.

C. Problems to be Solved by the Invention Particularly, there is a strong demand for an apparatus, such as the X-ray imaging apparatus, which performs tomography while the X-ray tube 4 and the imaging mechanism 5 draw a linear trajectory and a curved trajectory. There is a reduction in the weight and size of the photographing mechanism 5.

The reason is that these tomographic imaging methods use the center of movement or the center of rotation as a fulcrum, and the X-ray tube 4 and the imaging mechanism 5 always move or rotate in opposite directions so as to face each other. If the weight of the mechanism 5 is too heavy, the movement of the X-ray tube 4 cannot be followed, and "blurring" occurs in the tomographic image of the essential surface, and if the size of the imaging mechanism 5 is large, the movement range or rotation range is large. Is enlarged, the holding mechanism (frame 7, linear bearing unit 9 and others in FIG. 5) is enlarged, and an inconvenience such as the need to secure an extra large area for the installation space of the X-ray imaging apparatus occurs. is there.

The conventional imaging mechanism 5 is a half-size cassette 15 of the maximum size.
(According to the JIS standard, the vertical length is 388 mm and the horizontal length is 464 mm.
Is. This is a size set for expanding the imaging range of the subject in the length direction, and therefore the cassette for half-cutting 15
Cassette tray that also accommodates
Since the rail 19 set to the width of 17 is installed, the width size has the maximum size, resulting in the above inconvenience.

The present invention has been made in view of such circumstances, and provides an X-ray imaging apparatus capable of reducing the width size and the size of the imaging mechanism in the height direction and the weight associated therewith. It is intended to be provided.

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

That is, the invention is a sheet carriage for continuously feeding an X-ray sensitive sheet to a photographing position, a cassette tray for uniformly accommodating cassettes of various sizes for accommodating X-ray sensitive sheets of various sizes one by one, and In an X-ray radiographing apparatus equipped with a pair of rails for guiding the cassette tray to the radiographing position to enable cassette telegraphing and cassette radiographing, a pair of guides for detachably supporting the sheet carriage. Rail
It is provided below the pair of rails and adjacent to each other in the height direction, and the interval between the pair of rails of the imaging mechanism is set according to the cassette width for storing the maximum size X-ray sensitive sheet, The width of the cassette tray that uniformly accommodates other size cassettes is set according to the maximum size cassette width, and only one of the sheet carriage or the cassette tray is mounted in the photographing mechanism. It is characterized by that.

E. Action According to this invention, the pair of guide rails that detachably supports the seat carriage is provided below the pair of rails that guide the cassette tray to the photographing position and in the vicinity of the height direction thereof. Therefore, it is possible to reduce the size of the shooting mechanism in the height direction by mounting either the seat carriage or the cassette tray inside the shooting mechanism, and the guide rails that support the sheet carriage use the cassette tray. Since it is located below the pair of supporting rails, the guide rail does not enter the field of view when photographing with a cassette or a cassette tray. Further, since the sheet carriage generally has a built-in pressure bonding mechanism for sandwiching the intensifying screen in the film, its height is higher than that of the cassette or the cassette tray, but the sheet carriage does not have the height of the cassette tray. Since they are supported by the guide rails arranged below the rails, both film positions (heights) can be made substantially the same.

Further, since the rail interval for guiding the cassette tray to the photographing position is set in accordance with the maximum size cassette width, the maximum size cassette is guided to the photographing position by the rail without being accommodated in the cassette tray.
Cassettes of other sizes are accommodated in a cassette tray having the same width as the maximum size cassette width and guided to the photographing position by the rail.

Compared with the conventional imaging mechanism in which a pair of rail intervals is set to the width of the cassette tray that also accommodates the maximum size cassette, the rail interval is narrowed and the width of the imaging mechanism is reduced because the cassette tray is not used.

F. Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view for explaining cassette imaging in the imaging mechanism of the X-ray imaging apparatus of the present invention.

Note that the X-ray imaging apparatus has the same configuration as the apparatus described in the related art with reference to FIG. 5, and thus the description thereof is omitted here.

Further, the cassette telephoto shooting in the shooting mechanism is performed in the same manner as described in the prior art with reference to FIG. 4, and therefore the description thereof is omitted here. Only the cassette photographing, which is characteristic of the present invention, will be described.

The structural differences between the photographing mechanism 20 in this embodiment and the conventional photographing mechanism 5 are as follows.

The upper portion A corresponding to the photographing position of the photographing mechanism 20 has an opening 22 for inserting a cassette or a cassette tray, which will be described later, and for inserting / removing the sheet carriage 21.
It is formed in a state of opening toward a front view of FIG. Reference numeral 23 is a lid for opening and closing the opening 22.

A pair of rails 24 for guiding the cassette or the cassette tray to the photographing position are provided on both sides of the inner surface of the opening 22.
Is installed.

The cassette here refers to the maximum size half-cut cassette 15, and the cassette tray is the half-cut cassette.
The cassette tray 27 has the same width as the width of 15 (X direction in FIG. 1) and accommodates a cassette of a size smaller than the half-cut cassette 15. That is, a half-cut cassette
Set the installation interval of the rails 24 according to the width of 15 and further according to the width of the cassette 15 for half-cutting, a cassette of a smaller size (the above-mentioned large angle size, continental size,
The width of the cassette tray 27 for accommodating the four-cut size, etc. is set.

As shown in the sectional view of FIG. 2, the cassette 15 for half-cutting is
Front plate 25 made of a material that evenly absorbs transmitted X-rays
And a back cover 26 that fits into the cover, and these have a one-sided opening structure so that the film can be easily taken in and out. Inside the cassette 15 for half-cutting, there are a pair of intensifying screens 27 ', 27 "provided on the front and back sides, and the half-size film F is sandwiched between the intensifying screens 27', 27". On the inner surface of the back cover 26, a sponge 28 for enhancing the adhesion between the intensifying screens 27 ′ and 27 ″ and the film F is attached.

The cassettes of sizes other than the half-cut cassette 15 have the same configuration.

Vertical and horizontal directions of cassette 15 for half-cutting (X and Y directions in Fig. 1)
The size of is stipulated by the JIS standard, and the vertical dimension is 388 mm and the horizontal dimension is 464 mm. The large-size cassette 16, which is one size smaller than the half-cut cassette 15, has a vertical dimension of 388 mm and a horizontal dimension of 388 mm. Therefore, the cassette tray 27 that accommodates cassettes of sizes other than the half-cut cassette 15 has a storage area of at least "388 x 388 mm ² " and a width of 464.
formed as mm.

Further, as shown in FIG. 1, the cassette tray 27 has brim portions 29, 29 on both lateral side surfaces.
A resin sliding plate 30 for allowing the cassette tray 27 to move smoothly on the rails 24 is adhered to the cassette tray 27 under 9,29. The width dimension is a dimension including the brim 29, 29 portion.

On the bottom surface of the opening 22, a pair of guide rails 31 that allows the seat carriage 21 to be attached / detached is laid below the pair of rails 24 and close to the height direction thereof.
Guide rails are provided on both sides of the bottom of the seat carriage 21.
The structure is such that it fits into 31 and slides outward so that it slides.

In order to perform cassette imaging with the above-described imaging mechanism 20, first, the lid 23 is opened and the sheet carriage 21 is taken out. Next, if you want to use the half-cut cassette 15 for X-ray photography, leave the half-cut cassette 15 sideways as it is and slide it on the rail.
If you want to set the inside of the opening 22 along 24 and use X-ray imaging with a cassette with a size of 16 or less for large angle, store it in the cassette tray 27 and put the cassette tray 27 along the rail 24. Set in the opening 22.

In this way, since the interval between the rails 24 that determines the horizontal width size of the imaging mechanism 20 is set according to the horizontal width dimension of the half-cutting cassette 15, the cassette tray 17 (the first Compared with the photographing mechanism 5 in which the width of the rail 24 is set to the width dimension (see FIG. 3), the width of the photographing mechanism 20 is reduced by the amount that the cassette tray 17 is not used, and the weight is reduced accordingly. Further, the sheet carriage 21 is made detachable, and the half-cut cassette 15 or the cassette tray 27 is inserted using the space from which the sheet carriage 21 is taken out, so that the dimension in the height direction is also reduced.

Further, since the width of the sheet carriage 21 is generally narrower than that of the half-cut cassette 15 and the cassette tray 27, the width of the guide rail 31 that supports the seat carriage 21 is also the width of the rail 24 that supports the half-cut cassette 15 and the cassette tray 27.
Narrower than. Therefore, guide rail 31
If it is arranged above 24, when the half-cut cassette 15 or the cassette tray 27 is mounted on the rail 24 for shooting (when shooting a cassette), the guide rail 31 enters the field of view, which is a disadvantage. As described above, the pair of guide rails 31 that enables the seat carriage 21 to be attached and detached.
Is laid under the pair of rails 24 so as to be adjacent thereto, so that such an inconvenience does not occur even during cassette imaging.

In general, the height of the sheet carriage 21 is such that the half-cut cassette 15 or the cassette tray 27 has a built-in pressure-bonding mechanism (not shown) for sandwiching an intensifying screen in a film.
Although it is higher than the above, since the pair of guide rails 31 that allows the seat carriage 21 to be attached and detached is disposed below the pair of rails 24 that support the cassette, the half-cut cassette 15 (cassette tray 27) or Seat carriage 21
When the is set in the photographing mechanism 5, the film positions in the height direction are substantially the same, and the distance between the top plate 3 and the film can be reduced.

G. Effect of the Invention As is clear from the above description, the X-ray imaging apparatus according to the present invention sets the interval between the rails of the imaging mechanism to the cassette width of the maximum size, and the cassette tray for accommodating cassettes of other sizes. Since the width of is set to the maximum cassette width, the maximum size cassette does not have a cassette tray.
By accommodating the cassettes of other sizes in the cassette tray, the cassettes are guided to the photographing position, and the X-ray photographing is performed in each cassette. Here, since the cassette of the maximum size is not accommodated in the cassette tray, the rail interval is narrowed and the width size of the photographing mechanism can be shortened.

Further, since a pair of guide rails for detachably supporting the sheet carriage are provided below the pair of rails for guiding the cassette tray to the photographing position and close to the height direction, the sheet carriage or the cassette is provided. By mounting only one of the trays inside the shooting mechanism, the size of the shooting mechanism in the height direction can be reduced, and the guide rails that support the sheet carriage are located below the pair of rails that support the cassette tray. Since the guide rail is located at the position, the guide rail does not enter the field of view when photographing using the cassette or the cassette tray, and thus no problem occurs in photographing. Further, since the sheet carriage generally has a built-in pressure bonding mechanism for sandwiching the intensifying screen in the film, its height is higher than that of the cassette or the cassette tray, but the sheet carriage does not have the height of the cassette tray. Since they are supported by the guide rails arranged below the rails, the film positions (heights) of the both can be made substantially the same, and the photographing can be suitably performed.

Therefore, by moving or rotating the imaging mechanism and the X-ray tube for X-ray exposure, the movement or rotation range can be reduced when performing tomography, and the X-ray imaging apparatus is installed. The space can be reduced.

Further, since the weight of the imaging mechanism is reduced along with the reduction of the width size and the size in the height direction, it is possible to stabilize the orbit in the tomography.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a perspective view for explaining a cassette photographing in a photographing mechanism of the present invention, and FIG. 2 is a sectional view showing a schematic configuration of the cassette. is there. Further, FIGS. 3 and 4 relate to a conventional example, and FIG. 3 is a perspective view for explaining cassette photographing in a conventional photographing mechanism,
FIG. 4 is a schematic side view for explaining the cassette-less quick shooting by the shooting mechanism. Note that FIG. 5 is a diagram illustrating a schematic configuration of a general X-ray imaging apparatus, FIG. 5A is a front view thereof, and FIG. 5B is a side view thereof. 15 ... Half-cut cassette (maximum size cassette), 16 ... Large angle cassette (other sizes cassette) 20 ... Shooting mechanism, 21 ... Sheet carriage 24 ... Rail, 27 ... Cassette tray

Claims (1)

[Scope of utility model registration request] 1. A sheet carriage for continuously feeding X-ray sensitive sheets to a photographing position, a cassette tray for uniformly storing cassettes of various sizes for individually storing X-ray sensitive sheets of various sizes, and In an X-ray imaging apparatus equipped with a pair of rails for guiding a cassette tray to the photographing position and enabling a cassette telegraphing and a cassette photographing, a pair of guide rails for detachably supporting the sheet carriage. Is provided below the pair of rails and close to the height direction thereof, and the interval between the pair of rails of the imaging mechanism is set according to the cassette width for accommodating the maximum size X-ray sensitive sheet. At the same time, set the width of the cassette tray that accommodates cassettes of other sizes uniformly according to the maximum width of the cassette. X-ray imaging apparatus characterized by only either one of the seat carriage or the cassette tray has to be mounted in the photographing mechanism.