JPS6041953A - Multi-rotary cable treating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a cable connected to an X-ray tube that enables rotation of the X-ray tube along the periphery of a subject insertion hole in a radiation gantry. The present invention relates to a processing device.

[Technical background of the invention and its problems] Conventionally, cable processing devices that can be installed in CT scanners are
As described in Japanese Unexamined Patent Publication No. 43777 of 1982,
- a cylindrical rotating body with a radiation source and a detector arranged oppositely on the side;
A cable guide body is arranged concentrically with a spaced part on the outside of the rotating body, a communication roller is freely movably provided in the spaced part, and a cable guide body is introduced into the spaced part symmetrically from the guide body. and a cable that winds an intermediate portion around the communication roller and connects to the radiation source and the detector, respectively, and drives the communication roller in response to the rotation of the rotating body.

However, in the case of cable processing with the above-mentioned configuration, if the connecting rollers are allowed to float above the cable introduction holes symmetrically drilled on the upper circumferential side of the guide body, there is a risk that the cables may become tangled in the connecting rows. Also, if cable introduction holes are provided close to each other on the upper station side of the guide body, and the cable is introduced through these two cable introduction holes, the cable introduction hole located above one cable introduction hole is A new problem has arisen in that among the cables introduced through the cable introduction holes, the cables located on the circumferential side of the top of the guide body hang down and obstruct the rust conduction of the communication rollers.

[Object of the Invention] This invention has been made based on the above-mentioned circumstances, and an object of the invention is to provide a multi-rotation cable processing device whose rotation is not inhibited by cables installed inside the cable.

[Summary of the Invention] A summary of the present invention, which achieves the above object, includes a rotatable annular inner cable guide body in which a radiation source and a radiation detector are disposed opposite each other, and a radiation source and a radiation detector are fixed concentrically to the inner cable guide body. a plurality of support rollers and drive rollers interposed between a circumferential surface of the inner cable guide body and an inner circumferential surface of the outer cable guide body; and the outer cable guide body. a cable that is wound around the inner circumferential surface of the inner cable guide body after being guided along the inner circumferential surface of the guide body, rotates around the circumferential surface of the drive roller, and is then wound around the circumferential surface of the inner cable guide body; The present invention is characterized in that the cable is wound around or unwound onto the curved surface of the inner cable guide body.

[Embodiment of the Invention] An embodiment of the invention will be described with reference to the drawings.

A multi-rotation cable processing device 1 according to the present invention is attached to a vertically erected frame 3 having a subject insertion hole 2. A first fixed gear 4, which is formed as an annular plate concentric with the subject insertion hole 2 and has internal teeth carved on its inner periphery, is arranged parallel to the frame 3. Ru. Reference numeral 7 denotes an annular outer cable guide that is provided parallel to the frame 3, has a substantially U-shaped cross section in the radial direction, and is formed such that the substantially U-shaped opening is on the inside. Connect the cable to the appropriate part of your body.
+ Has an introduction hole 8. 9, the cross section in the radial direction is t! This is an annular inner cable guide body that is shaped like a letter 8 and is formed so that the substantially U-shaped opening is on the outside. The inner cable guide body 9 is arranged inside the outer cable guide body 7 such that the opening having a substantially U-shaped cross section and the substantially U-shaped opening of the outer cable guide body 7 face each other. , and a radiation source (e.g., an X-ray tube and the radiation source 13, which is not shown in the figure)
The detector is rotatably configured to include an Xts detector.

The inner cable guide body 9 also has a second fixed gear 5 having internal teeth that mesh with eight planetary gears 6 that mesh with the first fixed gear 4. Said outer ke, - pull 10,000, l
In a space 10 formed by opposing the substantially U-shaped opening of the C body 7 and the substantially U-shaped opening of the inner cable guide body 9, there are support rollers 11 and 1 of 7. One end of the center shaft of each support roller 11 and drive roller 12 is pivotally supported by the planetary gear 6, and the other end of the center shaft is pivotally supported by an annular connecting plate 13. Support 5- be supported. The seven supporting rollers 11 and one driving roller 12 are pivotally supported on the connecting plate 13 at positions that form the vertices of a regular octagon. The cable 14 includes two cables 15A and 15B that connect a high voltage generator (not shown) and a radiation generator (not shown), a radiation detector (not shown), and a data collection unit (not shown). Two cables 16A and 16B connecting the cables 16A and 16B are arranged in parallel and covered with an insulating material 17 to form a band shape. The cable 14 introduced through the cable introduction hole 8 is inserted between the inner circumferential surface of the outer cable guide body 7 and the support roller 11 along the inner circumference of the outer cable guide body 7, for example in a clockwise direction. The cable is wound and then rotated around the roller surface of the drive roller 12 and reversed in a counterclockwise direction, and is wound counterclockwise around the curved surface of the inner cable guide body 9 to form a cable introduction hole provided in the inner cable guide body 9. Extracted from 18. The length of the cable 14 wound around the outer cable guide 7 and the inner cable guide body 9 is appropriately determined according to the required rotation speed of the inner cable guide body 9. .

Next, the operation of the configuration will be described below. When the multi-rotation cable processing neck 1 configured as described above is incorporated into an X-ray CT scanner, a scanning operation is performed when a subject (as shown) is inserted into the subject insertion hole 2. That is, by rotating the inner cable guide body 9,
) (X-ray irradiation is performed while the X-ray detector placed opposite the X-ray tube is rotated along the circumference of the subject centering on the body of the subject. Detect the rays with the X-ray detector and obtain the required data.

When the inner cable is -f and the body 9 rotates counterclockwise in FIG. Since it is supported, the drive 1]-ra 12 rotates clockwise, and...
The cable 14 is fed into the inner cable guide body 9, and as the inner cable guide body 9 rotates, the inner cable guide body 9 is rotated.
One winding of the cable 14 is wound around the circumferential surface of the f-shaped body 9,
When winding, a metal is inserted into the inner circumference of the outer cable guide body 7.
! Since the j cable 14 is supported by the support roller 11, it does not hang down due to its own weight, and therefore does not get caught up in the support roller 11. Therefore, the inner cable guide body 9 with the X-ray tube etc.
It is possible to perform a predetermined number of rotations without being hindered by the drooping of the shaft, such that the predetermined number of rotations are inhibited.

FIG. 5 shows a state in which the cable 14 is wound around the inner cable guide body 9.

After winding, when the inner cable guide body 9 is rotated clockwise, the drive roller 12 rotates counterclockwise, and feeds the cable 14 wound around the inner circumference of the inner cable guide body 9 to the outer cable guide body 7. , the cable is wound around the inner periphery of the outer cable guide body 7 as shown in FIG.

Although one embodiment of the present invention has been described in detail above, this invention is not limited to the above-mentioned embodiment, and can be implemented with appropriate modifications within the scope of the gist of the invention. Not even.

−/− Other embodiments of the invention are not shown in FIGS. 7-9.

Other embodiments of the present invention are different from the above embodiments in that the first fixed gear 4, the second fixed gear 5, and the planetary gear 6 are not provided, and the cable 14 has a plate-shaped biasing member, such as a plate spring 19. The leaf springs 19 and the cables 14 are wound in an overlapping manner inside the outer cable guide body 7 and the inner cable guide body 9. With this configuration, by omitting gears, the mechanism can be simplified,
The weight can be reduced, and since the cable 14 and the leaf spring 19 are wound around the drive roller 12, even if the inner cable guide body 9 rotates at high speed, the leaf spring 19
As a result, the cable guide body 14 is always pressed around the drive roller 12, and the cable 14 can be fed even more reliably.

[Effects of the Invention] According to the invention described in detail above, it is possible to prevent the cable to be wound from drooping due to its own weight, and to rotate the rotating body that holds the radiation source as smoothly as necessary. A rotating cable handling device can be provided. When the multi-rotation cable processing device according to the present invention is applied to a CT scanner, data can be continuously collected during dynamic scanning by the CT scanner.

[Brief explanation of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the embodiment, FIG. 3 is an explanatory diagram showing the planetary gear mechanism in the embodiment, and FIG. 4 is a longitudinal sectional view showing the embodiment. FIG. 5 is an explanatory view showing the state in which the cable is wound around the inner cable guide body in the embodiment, and FIG. 6 is a cross-sectional perspective view showing the cable in the embodiment described above. FIG. 7 is a sectional front view showing another embodiment of the present invention, FIG. 8 is a longitudinal sectional view showing another embodiment of the invention, and FIG.
The figure is a cross-sectional perspective view showing a state in which the cable and the leaf spring are arranged in an overlapping manner in the other embodiment. 7... Outer cable guide body, 9...
Inner cable guide body, 11...Support roller,
12... Drive roller, 14... Cable. Akira 5 Figure 11 %6 factor ≦ 26r

Claims (1)

[Claims] radiation! a rotatable annular inner cable guide body in which a source and a radiation detector are disposed oppositely to each other; an annular outer cable guide body fixed concentrically to the inner cable guide body; and a circumference of the inner cable guide body. a plurality of support rollers and a drive roller interposed between the surface and the inner circumferential surface of the outer cable guide body; and a cable that is reversed and wound around the circumferential surface of the inner cable guide body, and the cable is wound around the circumferential surface of the inner cable guide body or unwound by rotation of the inner cable guide body. A multi-rotation cable processing device featuring: