JP3257493B2 - X-ray fluoroscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic apparatus capable of performing both cassette type radiography and cassette type radiography.

[0002]

2. Description of the Related Art A conventional X-ray fluoroscopic apparatus capable of performing cassette-type radiography includes an X-ray irradiator, a housing, and a carriage movable between an imaging position and a standby position within the housing. And a drive mechanism for the carriage, so that the sheet-shaped X-ray film can be transported between the carriage at the standby position in the housing and the sheet-shaped X-ray film storage magazine.

When the unphotographed sheet-shaped X-ray film in the storage magazine is conveyed to the carriage at the standby position, the carriage is conveyed to the photographing position together with the unphotographed sheet-shaped X-ray film by the driving mechanism, and then moved to the standby position after the photographing. After being returned, the photographed sheet X-ray film is transported from the carriage into the collection magazine.

[0004]

In such an X-ray fluoroscopic apparatus, an entrance is formed in the housing so that an X-ray film with a cassette can be inserted and removed so that cassette type imaging can be performed. It has been proposed that the cassette-equipped X-ray film can be attached to and detached from a carriage. Thus, the carriage to which the unexposed cassette-equipped X-ray film is attached can be transported to the imaging position by the drive mechanism to perform X-ray fluoroscopic imaging.

It is necessary to provide an opening and closing member for the entrance so that the sheet-shaped X-ray film for cassette photographing is not exposed to light entering the housing from the entrance.

If the opening and closing member is configured to be manually opened and closed by an operator from the outside of the housing, a sheet-type X-ray film for cassette-type imaging can be collected before being collected in a magazine,
Before the film entrance of the magazine is closed, the entrance of the cassette-equipped X-ray film may be erroneously opened, and the sheet-type X-ray film for cassette type imaging may be exposed. Further, when the handle attached to the opening / closing member projects from the housing, there is a high possibility that the door may be opened unexpectedly by contacting the handle.

The provision of a dedicated mechanism for preventing such an unexpected movement of the opening / closing member complicates the structure and increases the manufacturing cost.

In view of the above, a cassette-type photographing sheet X
It is conceivable to provide a mechanism for opening the opening / closing member based on a signal output when there is no risk of exposing the line film. However, providing a dedicated drive mechanism for opening the opening / closing member complicates the structure and increases the manufacturing cost.

[0009] An object of the present invention is to provide an X-ray fluoroscopic apparatus capable of solving the above problems.

[0010]

SUMMARY OF THE INVENTION The present invention provides an X-ray irradiator, a housing, a carriage movable in the housing, a driving mechanism of the carriage, a carriage and an X-ray film storage in the housing. And a mechanism capable of transporting the sheet-shaped X-ray film between the X-ray fluoroscopic imaging apparatus, wherein the entrance to the housing,
The cassette-equipped X-ray film is formed so that it can be taken in and out of the housing, the cassette-equipped X-ray film is detachable from the carriage, and an opening / closing member for the entrance is provided. It is characterized in that it can be displaced to the opening position of the entrance by being pushed from the inside of the housing via the driven carriage.

According to the structure of the present invention, the opening / closing member of the entrance / exit of the cassette-equipped X-ray film can be displaced to the open position by being pushed from the inside of the housing by the carriage driven by the drive mechanism. Therefore, the operator does not need to manually open the opening / closing member from the outside of the housing. This makes it possible to displace the opening / closing member to the open position without providing a dedicated drive mechanism based on a signal output when there is no risk of exposing the cassette-type radiographic sheet-shaped X-ray film,
Complex structure and cost increase can be prevented.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

An X-ray fluoroscopic apparatus 1 shown in FIG.
The subject mounting top plate 4 supported via the rotating frame 3 by an X-ray irradiator 6 disposed above the top plate 4 via the support column 5, and below the top plate 4 The apparatus includes an image intensifier 7 to be arranged, and a cassetteless quick-shooting device 8 arranged between the top plate 4 and the image intensifier 7.

As shown in FIGS. 2 and 3, the rapid-speed photographing apparatus 8 includes a housing 9, a carriage 63 movable in the housing 9, a driving mechanism 70 of the carriage 63, and a film transport mechanism 12. First and second magazines 10 and 13 which are sheet-shaped X-ray film storage units
And As shown below, the flash photography device 8 transfers a large number of unphotographed sheet-shaped X-ray films 11 stored in the first magazine 10 to a first standby position (indicated by a broken line A1 in FIG. 2). (The position shown in the figure) into the carriage 63, and is conveyed between the X-ray irradiator 6 and the image intensifier 7 by the carriage 63, returned to the first standby position after the photographing, and photographed sheet-like X-ray film. 11 'is a film transport mechanism 12
The cassette-type imaging is performed by sequentially collecting the cassettes in the second magazine 12.

As shown in FIG. 2, the housing 9 is
A first portion 9a along the longitudinal direction of the top plate 4;
A second portion 9b extending in the lateral direction of the top plate 4 from one end of the portion 9a. One end of the first portion 9a is a first standby position of the carriage 63, and the other magazine 1 is
0 and 13 are arranged.

As shown in FIGS. 3 to 5, the carriage 63 has a hollow main body 63a and two pairs of pinch rollers 63b and 63c provided in the main body 63a so as to be arranged in the longitudinal direction of the top plate 4. And a pair of cassette support rods 63 d and 63 e arranged in parallel in the longitudinal direction of the top plate 4.
An X-ray passage opening 63a 'is formed on the upper surface of the main body 63a, and a sheet-like X-ray film entrance / exit 63a "is formed on the side surface. The pinch rollers 63b and 63c are fed into the carriage 63 by the film transport mechanism 12. The sheet-shaped X-ray film 11 can be held by sandwiching the sheet-shaped X-ray film 11, and the sheet-shaped X-ray film 11 is rotated by an unillustrated driving device about an axis along the short direction of the top plate 4, so that the sheet-shaped X-ray film 11 can be inserted into the entrance 63a. ″. Both cassette support rods 63d and 63e are movably inserted into the main body 63a via guides 63g and 63h so as to be movable in the short direction of the top plate 4, and one ends thereof are connected to a cassette holder 63f. As shown in FIG. 5, the cassette holder 63f is
By separating the X-ray film 69 with cassette from both the rods 63d and 63e by separating from the main body 63a, the cassette holder 63f is moved closer to the main body 63a.
The cassette-attached X-ray film 69 can be sandwiched between the main body 63a and the cassette holder 63f. Thereby, the cassette-attached X-ray film 69 is moved to the carriage 63.
It is removable.

As shown in FIG. 3, the carriage 63
Is supported by a rail 71 provided in the housing 9 via a roller 72 so as to be able to reciprocate in the short direction of the top plate 4, and is driven by a drive mechanism 70. The drive mechanism 70
Is constituted by, for example, a chain winding transmission mechanism,
The carriage 63 can be driven by connecting the orbitally driven chain to the carriage 63. The carriage 63
Is the first standby position, the sheet-shaped X-ray film 11
A first imaging position (indicated by a two-dot chain line A2 in FIG. 2) disposed between the X-ray irradiation device 6 and the image intensifier 7,
A second photographing position (indicated by a two-dot chain line A3 in FIG. 2), a retreat position (indicated by a two-dot chain line A4 in FIG. 2), and a second
Positioning is possible at a standby position (indicated by a two-dot chain line A5 in FIG. 2). The first shooting position is arranged between the retreat position and the second shooting position. The carriage 63 to which the cassette-attached X-ray film 69 is attached is positioned at a retracted position when image data is obtained by the image intensifier 7. The second standby position is a position further away from the first shooting position than the first standby position,
As will be described later, the cassette-equipped X-ray film 69 can be attached to and detached from the carriage 63 at the second standby position.

As shown in FIGS. 1 and 4, an entrance 80 is formed in the housing 9 so that an X-ray film 69 with a cassette can be inserted into and removed from the housing 9. An opening / closing member 81 for the entrance 80 is provided. The opening / closing member 81 is used to prevent light from entering the housing 9 from the entrance 80 at the closed position and to bring the inside of the housing 9 into a dark room state.

In the present embodiment, the opening / closing member 81 is formed of a smooth rectangular plate material having no catching portion such as a handle on its surface, and is further disposed inside the outer surface of the housing 9. It is difficult to open and close by hand. The opening / closing member 81 is attached to the housing 9 via a hinge 82 such that the lower end swings about an axis along the longitudinal direction of the top plate 4. The opening and closing member 81
Is connected to the housing 9 via the latch 83, so that the entrance 80 is closed. The latch 83 includes a male member attached to the opening / closing member 81 and a female member attached to the housing 9 so as to elastically sandwich the male member.

The opening / closing member 81 can be pushed from the inside of the housing 9 by the cassette holder 63f of the carriage 63 positioned at the second standby position by being driven by the drive mechanism 70. By being pushed through the carriage 63 in this manner, the opening / closing member 81 is disconnected from the housing 9 via the latch 83, swings by gravity, and opens and closes the entrance 80 as shown by a two-dot chain line in FIG. Displace to position. In the open state of the entrance 80, the cassette holder 63f is separated from the main body 63a of the carriage 63 as described above, whereby the cassette-equipped X-ray film 69 can be held by the carriage 63. X-ray film 69 with cassette after shooting
Is removed from the carriage 63, and the carriage 63 is moved to the first standby position, whereby the opening / closing member 81 is swung by hand to push the male member of the latch 83 into the female member, thereby closing the entrance 80.

As shown in FIG. 1, a first magazine insertion opening 21 and a second magazine insertion opening 22 are formed on the side surface on the other end side of the first portion 9a of the housing 9 so as to be vertically arranged in parallel.
The first magazine 10 is inserted through the first magazine insertion slot 21.
Can be inserted into and removed from the housing 9 from the short side direction of the top plate 4. The second magazine 13 can be inserted into and removed from the housing 9 through the second magazine insertion opening 22 from the short direction of the top plate 4. Each magazine 10, 1 inserted into the other end of the first portion 9a of the housing 9
The bottom surface of 3 is inclined downward toward one end of the first portion 9a.

As shown in FIG. 6, the first magazine 10
Has a rectangular parallelepiped magazine main body 34, a film entrance 35 formed at the top of the magazine main body 34, and a plate-like lid member 36 that opens and closes the film entrance 35 by reciprocating movement. The reciprocating direction of the lid member 36 (the direction of arrow A in FIG. 4) is along the longitudinal direction of the top plate 4. One end 36a of the lid member 36 is provided with the slit 3 when the first magazine 10 is inserted into the housing 9.
The film door 35 is exposed to the outside of the housing 9 through 4a, so that the film entrance 35 can be opened and closed from the outside of the housing 9.

As shown in FIG. 7, the second magazine 13
Is provided with a rectangular parallelepiped magazine main body 44, a film entrance 45 formed at an upper portion of the magazine main body 44, and a plate-like lid member 47 for opening and closing the film entrance 45 by reciprocating movement. The reciprocating direction (the direction of arrow B in FIG. 5) of the lid member 47 is along the longitudinal direction of the top plate 4. One end 47 a of the lid member 47 is provided with the slit 4 when the second magazine 13 is inserted into the housing 9.
The film door 45 is exposed to the outside of the housing 9 through the housing 4a, so that the film entrance 45 can be opened and closed from the outside of the housing 9.

The film transport mechanism 12 shown in FIG. 3 includes a carriage 63 at the first standby position and each of the magazines 10 and 13.
In this embodiment, a suction cup 61 and first and second pinch rollers 62a and 62b are provided in order to transport the sheet X-ray films 11 and 11 'between the first and second pinch rollers 62a and 62b. The suction cup 61 is provided so as to be able to reciprocate in the longitudinal direction of the top plate 4 and in a direction orthogonal to the upper surface of the sheet-shaped X-ray film 11 stored in the first magazine 10, and a sheet in the first magazine 10 is provided. X-ray films 11 can be sucked out one by one and taken out. The first pinch roller 62a is
3 is disposed between the first magazine 10 and the first magazine 10, and is rotationally driven by an unillustrated driving device about an axis along the short direction of the top plate 4. The imaging sheet-shaped X-ray film 11 can be fed into the carriage 63 at the first standby position. The second pinch roller 62 b is disposed between the carriage 63 and the second magazine 13, and is driven to rotate about an axis along the short direction of the top plate 4 by a driving device (not shown), so that the first pinch roller 62 b is moved to the first position.
The photographed sheet-shaped X-ray film 11 ′ sent from the carriage 63 at the standby position can be sent into the second magazine 13. Note that the photographed sheet X sent out from the carriage 63 by the second pinch roller 62b
When feeding the line film 11 'into the second magazine 13, the first pinch roller 62a can be displaced to a position that does not interfere with the photographed sheet-shaped X-ray film 11'.

The drive mechanism 70 of the carriage 63 is connected to a control device (not shown), and a signal for preparing to mount the cassette-equipped X-ray film 69 can be input to the control device by operating a control panel (not shown) connected to the control device. It has been. Further, a sensor for detecting whether or not the carriage 63 is located at the first standby position, and each of the magazines 10 and 13 is connected to the magazine insertion port 2.
A sensor for detecting whether or not it has been inserted into 1, 22;
Sensors for detecting whether or not the film entrances and exits 35 and 45 of the magazines 10 and 13 are closed by lid members 36 and 37 are connected to the control device. Each sensor can be configured by a micro switch, a photo micro sensor, or the like. The control device is an X-ray film 69 with cassette.
Is received, the carriage 63 is located at the first standby position, and the magazines 10 and 13 are not inserted into the magazine insertion ports 21 and 22, or the carriage 63 is located at the first standby position. , And the magazines 10 and 13 are inserted into the magazine insertion ports 21 and 22, and the film entrances and exits 35 and 45 are lid members 36 and 37.
The drive signal is sent to the drive mechanism 70 to move the carriage 63 to the second standby position only when the carriage 63 is closed. By the movement of the carriage 63 to the second standby position, the opening / closing member 81 is pushed from the inside of the housing 9 via the cassette retainer 63f of the carriage 63 as described above, and is displaced to the opening position of the entrance 80. At this time, the sheet-shaped X-ray film 1 for cassette-type imaging is used.
1, 1 'is housed in the magazines 10, 13 in which the film entrances 35, 45 are closed, or is not present in the housing 9, so that even if the entrance 80 is opened, there is no risk of exposure.

After the cassette 63 is attached to the carriage 63 at the second standby position via the rods 63d and 63e and the cassette holder 63f, the carriage 63 is moved to the retracted position, and the image intensifier 7 is moved to the retracted position. Then, the operator moves the carriage 63 to the second imaging position when necessary, and returns the carriage 63 to the first standby position after the end of imaging using the X-ray film 69 with the cassette. The X-ray film 6 with the cassette already photographed from the carriage 63 at the first standby position.
9 can be removed. After the removal, the cassette holder 63f is brought close to the main body 63a of the carriage 63, and the entrance 80 is closed by the opening / closing member 81, so that the cassette-less imaging can be performed.

According to the above configuration, the opening / closing member 81 of the entrance / exit 80 of the cassette-attached X-ray film 69 is connected to the housing 9.
Can be displaced to the open position by pushing from the inside of the device through the carriage 63 driven by the drive mechanism 70. Therefore, the operator does not need to manually open the opening / closing member 81 from the outside of the housing 9. This allows
Cassette-type radiographic sheet X-ray film 11, 1
The opening and closing member 81 can be displaced to the open position without providing a dedicated driving mechanism based on a signal output when there is no risk of exposing the 1 ', thereby preventing a complicated structure and an increase in cost. it can.

The present invention is not limited to the above embodiment. For example, the opening / closing member of the cassette-equipped X-ray film is closed by pressing the opening / closing member against the outer surface side of the housing by an elastic force of a spring or the like, and the opening / closing member returns to the closed position by elasticity by releasing the pressing through the carriage. You may make it. Alternatively, the cassette holder may be pressed against the carriage body by the elasticity of a spring or the like, and the X-ray film with the cassette mounted on the rod may be sandwiched between the cassette holder and the carriage body by the elasticity. In addition, the drive mechanism of the carriage, the structure of the cassette-type radiographic sheet-like X-ray film storage unit, and the structure of the sheet-type X-ray film transport mechanism are not particularly limited.

[0029]

According to the present invention, it is possible to prevent the entrance of the cassette-equipped X-ray film from being opened unintentionally without complicating the structure when performing both cassette-type and cassette-type imaging. It is possible to provide an X-ray fluoroscopic apparatus capable of preventing exposure of a sheet-type X-ray film for less-type imaging.

[0030]

In the X-ray fluoroscopic apparatus according to the present invention, means for detecting the presence or absence of a sheet-like X-ray film which may be exposed to light entering from the entrance of the cassette-mounted X-ray film; The carriage is preferably driven when there is a sheet-like X-ray film which may be exposed. As a result, accidental exposure of the sheet X-ray film can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of an X-ray fluoroscopic apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of the X-ray fluoroscopic apparatus according to the embodiment of the present invention;

FIG. 3 is a partial front view for explaining a configuration of a main part of the X-ray fluoroscopic apparatus according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a configuration of a portion along a line IV-IV in FIG. 2;

FIG. 5 is a perspective view of a carriage according to the embodiment of the present invention.

FIG. 6 is a perspective view of a first magazine according to the embodiment of the present invention.

FIG. 7 is a perspective view of a second magazine according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 6 X-ray irradiation device 9 Housing 10 First magazine (sheet-shaped X-ray film storage section) 11, 11 'Sheet-shaped X-ray film 13 Second magazine (sheet-shaped X-ray film storage section) 63 Carriage 69 X-ray film with cassette 70 drive mechanism 80 doorway 81 opening / closing member

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 6/00

Claims (1)

(57) [Claims] 1. An X-ray irradiator, a housing, a carriage movable in the housing, a driving mechanism of the carriage, and a sheet-like X-ray between the carriage and the X-ray film storage in the housing. An X-ray fluoroscopic apparatus having a mechanism capable of transporting a film, wherein an entrance to the housing is formed so that an X-ray film with a cassette can be inserted into and removed from the housing, and the X-ray film with a cassette is attached to and detached from the carriage. An opening / closing member for the entrance is provided, and the opening / closing member is displaceable to an opening position of the entrance by being pushed from the inside of the housing via a carriage driven by the driving mechanism. Fluoroscopy equipment.