JP2000347328A - Film holder driving mechanism for x-ray quick photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the reduction of a cost and a noise, and also, to make it possible for an operator to easily approach an object to be inspected by reducing the front space of a quick photographing case, as for a film holder driving mechanism for an x-ray quick photographing device with a film holder which is arranged so as to be moved backward and forward in accordance with the guide of a rail between two carrier rails constituting a carrier. SOLUTION: As for the mechanism, sprockets 22h and 26 are arranged at both end sides of one carrier rail 27a, and a chain 21f is stretched to be laid between the sprockets, and the chain is connected to the film holder 14, and the rear sprocket 26 constitutes a spline nut, and the sprocket 26 is integrally formed with a spline shaft 25. By rotating the spline shaft 25, the film holder 14 is moved backward and forward in the carrier 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette type X
The present invention relates to a film holder driving mechanism of an X-ray flash apparatus used for a fluoroscopic imaging table and the like, and a carrier and a driving unit supporting the film holder, which are particularly suitable for moving the film holder from the imaging preparation position to the imaging position, are integrally formed. The present invention relates to a film holder driving mechanism configured as described above.

[0002]

2. Description of the Related Art FIG. 3 is a right side view of a general overtable X-ray fluoroscopy table. As shown in this figure, a support frame 2 is rotatably mounted on a base 1, and a table 4 on which a subject 5 is placed is provided on the upper surface of the support frame 2. On the lower side of the support frame 2, an X-ray flash apparatus 6 is incorporated. Further, below the X-ray copying apparatus 6, an image intensifier 7 is located at a radiation center position o of X-rays from the X-ray tube apparatus 3 supported by the base 1.
In a normal state, the image intensifier 7, the television camera 8, and a television monitor (not shown) perform the fluoroscopic observation of the subject 5.

FIG. 4 is a cross-sectional view schematically showing an X-ray radiography apparatus used in combination with the above-mentioned X-ray fluoroscopy table. As shown in this figure, the X-ray flash apparatus 6 includes two film supply magazines 11a and 11b, and stores films (not shown) having different sizes.
The film supply magazine 11a is provided with a suction pad 12a for taking out the film therefrom and a transport system 13a for transporting the film to the film holder 14. For the film supply magazine 11b, a similar suction pad 12b and a transport system 13b are provided separately from the suction pad 12a and the transport system 13a.
Then, the film holder 1 is transferred from the transport system 13a or 13b.
The film sent to 4 is moved to a photographing position, photographed by X-ray irradiation, and then stored in a storage magazine 15 from a film holder 14 via a transport system 13c.

FIG. 5 shows a film holder 1 in a shooting preparation position in the above-mentioned X-ray flash apparatus.
FIG. 9 is a plan view showing a conventional example of a film holder driving mechanism which is moved to a photographing position by sending to X.4 and returns to a photographing preparation position after X-ray irradiation and photographing. In this conventional film holder driving mechanism, in order to move the film holder 14 from the photographing preparation position to the photographing position, the film holder 14 is moved in the X direction (horizontal direction in the figure) and the Y direction (front-back direction; vertical direction in the figure). ). Here, the movement in the X direction is performed as follows. When the motor 20a fixed to the snapshot case 19 is rotated, the sprocket 22a attached to the motor shaft is rotated, and the chain 21a runs to rotate the sprocket 22b. Thereby, sprocket 2
The chain 21b hung between the sprocket 2b and the sprocket 22c runs, and the carrier 27, a part of which is connected to the intermediate portion of the sprocket 22b, 22c of the chain 21b, moves in the X direction and is supported by the carrier 27. The moved film holder 14 moves in the X direction.

The movement in the Y direction is performed as follows. When the motor 20b fixed to the snapshot case 19 is rotated, the sprocket 2 attached to the motor shaft is rotated.
2d rotates, the chain 21c runs, and rotates the sprocket 22e. As a result, the chain 21d runs and the sprocket 22f rotates, and the sprocket 22f rotates.
The chain 21e looped between f and the sprocket 22g is run. Here, one end of one bar 23 is connected to the chain 21e and the other end is connected to the chain 21c. The bar 23 is connected to the film holder 14 in a free sliding bearing state in the X direction. Accordingly, the film holder 14 moves in the Y direction.

[0006]

However, in the above-described conventional film holder driving mechanism, as can be seen from FIG. 5, a large number of sprockets (sprockets 22a to 22d) are used.
2g) and chains (chains 21a to 21e) are required, the number of parts is large, and the cost is high. In addition, a large-capacity shooting case 19 for disposing them is required to have a large space, particularly a large space in front of the case (lower side in FIG. 5). Was hindered. Furthermore, since it is composed of a large number of sprockets and chains as described above, the operating noise due to the contact between them is large, and the noise level is high.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of parts and reduce costs, and to reduce the space for the rapid-moving case, particularly the front side thereof, so that the approach to the subject such as an operator can be facilitated. It is an object of the present invention to provide a film holder driving mechanism of an X-ray speed photographing apparatus capable of reducing noise and reducing noise.

[0008]

An object of the present invention is to provide a film holder for an X-ray radiographic apparatus in which a film holder is provided between two carrier rails constituting a carrier so as to be movable in the front-rear direction while being guided by the rails. In the drive mechanism,
Sprockets are provided at both ends of one carrier rail,
A chain is looped between the sprockets, and the chain and the film holder are connected. The rear sprocket also forms a spline nut and is formed integrally with the spline shaft. This is achieved by moving the film holder in the front-rear direction. According to this, the movement of the film holder in the front-rear direction is increased by the number of parts and the sprocket causing the adverse effect of noise generation.
Since the use of the chain is reduced and the space on the front side of the case is reduced, the cost and noise can be reduced. Can easily approach the subject.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a film holder driving mechanism of an X-ray speed-ray apparatus according to the present invention. In FIG. 1, 20c is a motor, 21f is a chain, 22h is a sprocket, 24 is a coupling,
25 is a spline shaft, 26 is a spline nut,
27a and 27b are carrier rails, and 28a and 28b are bearings. In addition, the same reference numerals as those in FIG. 5 indicate the same or corresponding parts.

In the film holder driving mechanism shown in FIG. 1, in order to move the film holder 14 from the photographing preparation position to the photographing position, the film holder 14 is moved in the X direction (left and right directions in the drawing) and the Y direction (front and rear directions; (Medium, vertical). Here, the movement in the X direction is performed as follows. When the motor 20a fixed to the snapshot case 19 is rotated, the sprocket 22a attached to the motor shaft is rotated, and the chain 21a runs to rotate the sprocket 22b. Thereby, sprocket 2
The chain 21b hung between the sprocket 2b and the sprocket 22c travels, and a part of the chain 21b (the carrier rail 27) is placed at an intermediate portion of the sprockets 22b and 22c.
The carrier 27 connected to a) moves in the X direction, and the film holder 14 supported by the carrier 27 moves in the X direction.

Next, the movement in the Y direction will be described. Y
In order to move the spline shaft 25 in the direction, the spline shaft 25 is connected via a coupling 24 to a motor 20 c fixed to the snapshot case 19. Here, spline shaft 2
5 is a bearing 28a, 2 fixed to the snapshot case 19.
8b rotatably supported.

The spline shaft 25 is provided with a spline nut 26 whose outer periphery is formed in a sprocket shape. The spline nut 26 is fixed to a carrier rail 27a via a bearing 28b as shown in FIG. The carrier 27 is composed of the carrier rail 27a and a carrier rail 27b that is opposed to the carrier rail 27a at a predetermined interval, and the film holder 14 is formed of the carrier rails 27a and 27b.
The inside (inside the carrier 27) is the vertical direction (Y direction) in FIG.
Can be moved to

The spline nut 26 is fixed to the rear side of the carrier rail 27a. A sprocket 22h is attached to the front side of the carrier rail 27a, and a chain 21f is looped between the sprocket 22h and the sprocket-shaped portion of the spline nut 26. And this chain 21
The film holder 14 is directly fixed to f. Thus, when the motor 20c rotates, the spline shaft 25 rotates via the coupling 24, and the spline nut 26 also rotates.

Since the carrier rail 27a is fixed by the bearing 28b, the spline shaft 25
Does not rotate even if rotates. On the other hand, spline nut 26
Is rotated, the chain 21f runs, and the film holder 14 fixed to the chain 21f moves the carrier rails 27a, 27a.
b, and moves in the Y direction.

[0015]

As described above, according to the present invention, the film holder can be moved with a simpler structure on the front side of the case than in the conventional mechanism, and the space on the front side of the case is reduced. The approach to the subject, such as the surgeon, becomes easier, the number of component parts is reduced, cost can be reduced, and noise can be reduced by reducing the number of sprockets and chains that generate noise. effective.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a film holder driving mechanism of the present invention.

FIG. 2 is an enlarged view showing a spline nut portion and its periphery in FIG.

FIG. 3 is a right side view of a general overtable X-ray fluoroscopic table.

FIG. 4 is a cross-sectional view schematically showing an X-ray flash apparatus used in combination with the X-ray fluoroscopy table shown in FIG.

FIG. 5 is a plan view showing a conventional film holder driving mechanism.

[Explanation of symbols]

14 ... Film holder, 19 ... Snapshot case, 20a, 2
0c: motor, 21b, 21f: chain, 22a-2
2c, 22h: sprocket, 24: coupling, 2
5 ... Spline shaft, 26 ... Spline nut, 2
7 Carrier, 27a, 27b Carrier rail, 28
a, 28b ... bearings.

Continued on the front page F term (reference) 2H013 AA03 BA02 4C093 AA02 CA32 CA33 EB02 EB04 EB30

Claims (1)

[Claims] In a film holder driving mechanism of an X-ray radiographing apparatus, a carrier is provided between two carrier rails constituting a carrier so as to be movable in the front-rear direction while being guided by the rails. A sprocket is provided at both ends of the sprocket, a chain is hung between the sprockets, and the chain and the film holder are connected. The sprocket on the rear side also forms a spline nut and is formed integrally with the spline shaft. A film holder driving mechanism for an X-ray rapid-photography apparatus, wherein the film holder is moved in the front-rear direction within the carrier by rotating the film holder.