JPS6336254B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is an X-ray machine that takes tomographic photographs by rotating a horizontal arm that has an X-ray irradiation tube suspended from one end and an X-ray film support tube suspended from the other end. In the radiographing device, by moving the rotation axis of the horizontal arm in the horizontal direction, it is possible to arbitrarily photograph different photographic areas such as dental arches, auditory canals, nasal passages, etc. without moving the patient's face. The purpose is to provide an X-ray imaging device that can

The present invention will be described below based on the embodiment shown in the drawings.A bevel gear 2 is provided on the bottom surface of the fixed frame 1 and at the upper end.
A rotary shaft 3 to which is fixed is installed vertically, and this rotary shaft 3 is supported by a bearing sleeve 6 via a radial bearing 4 and a thrust bearing 5, and the upper end of this sleeve 6 has a vertically rising end at one end. A motor support part 8 supporting the motor 7 is fixed to the lower surface of the sleeve 6, and a motor mounting plate 10 having a block 9 having a screw hole 28 fixed to the lower surface of the other end is fixed to the lower end of the sleeve 6. A fixing sleeve 11 having a flange 12 whose lower part expands in the horizontal direction and protrudes from the fixing frame 1 is fixed thereto.

A bevel gear 14 fixed to the output shaft 13 of the motor 7 meshes with the bevel gear 2 at the upper end of the rotating shaft 3, and the rotation of the motor 7 is transmitted to the rotating shaft 3. The bearing sleeve 6 passes through the large hole 27 of the retaining plate 15 inside the fixed frame 1, and the bearing sleeve 6 passes through the large hole 27 of the retaining plate 15.
5 is placed on a stand 16 provided on the fixed frame 1.
A screw shaft 17 passing through the fixed frame 1 in the horizontal direction
is screwed into the screw hole 28 of the block 9 fixed to the motor mounting plate 10, and has a handle 1 at the outer rear end.
A horizontal arm 20 is fixed to the rotating shaft 3 via a boss 19 attached to the lower end thereof. A film rotating shaft 22 is vertically supported at one end of the horizontal arm 20 via a tube shaft 21, and a disk 23 extending in the horizontal direction is fixed to the upper end of the film rotating shaft 22.

A first roller 24 is attached to one end of the roller 24, which rotates in pressure contact with a ring-shaped rib provided on the lower surface of the lower flange 12 of the fixed sleeve 11 fixed to the lower end of the bearing sleeve 6, and a disk 23 is attached to the other end. A horizontally extending rotating shaft 26 is rotatably supported inside the horizontal arm 20 and is provided with a second roller 25 that rotates in pressure contact with the lower surface.

Although not shown, as is well known, an X-ray film casing is attached to the lower end of the tube shaft 21, and an X-ray irradiation tube is mounted below the other end of the horizontal arm 20, facing the X-ray film support tube. It is set up to do so.

Next, to explain the operation, when the motor 7 is first rotated in the illustrated state, the rotating shaft 3 is rotated due to the meshing between the bevel gear 14 provided on the output shaft 13 of the motor 7 and the bevel gear 2 provided on the rotating shaft 3. rotate,
A horizontal arm 20 connected to the lower end of this rotating shaft 3 via a boss 19 also rotates together. In this case, since the rotating shaft 3 is supported by the bearing sleeve 6 via the radial bearing 4 and the thrust bearing 5, the rotating shaft 3 rotates smoothly, and with this rotation, the horizontal arm 20 is horizontally centered around the rotating shaft 3. Rotate. There is a rotating shaft 26 rotatably supported inside the horizontal arm 20, and since the first roller 24 provided at one end is in pressure contact with the flange 12 of the fixed sleeve 11, the rotating shaft 26 is driven, This rotation is transmitted to the film rotation shaft 22 through the contact between the second roller 25 and the disc 23, and therefore, as the horizontal arm 20 rotates, the film rotation shaft 22 rotates around its axis. In this manner, tomography of a desired area is performed along the current trajectory of the X-ray irradiation tube as the horizontal arm 20 rotates. When performing tomography of a position different from the above-mentioned region, for example, after performing tomography of the dental arch, when attempting to further take tomography of another region with a different imaging region, such as the auditory canal, for the same patient, When the handle 18 is manually rotated, the rotation of the screw shaft 17 causes the motor mounting plate 1 to be rotated through the block 9 screwed onto the screw shaft 17.
0, the rotating shaft 3, fixed sleeve 11, and horizontal arm 20 move together to the right in the drawing, and as a result, the position of the rotating shaft 3 relative to the fixed frame 1, that is, the rotation center position of the horizontal arm 20 moves. do.

Therefore, after adjusting the rotational center position of the horizontal arm 20 with respect to the patient by rotating the handle 18, by rotating the motor 7 again, it is possible to perform tomography of a region at a different position.

In the above description, the handle is rotated manually, but the handle is not limited to this, and the same effect can be obtained even if the handle is rotated using a motor or the like.

As described above, the present invention allows the rotational center point of the horizontal arm relative to the fixed frame to be adjusted without changing the positional relationship between the X-ray irradiation tube, the X-ray film support cylinder, and the rotational center point of the horizontal arm equipped with these. Since it is configured so that it can be moved and adjusted in the horizontal direction, tomography at different positions in the area can be performed extremely easily.

In other words, when taking a tomographic photograph, it is generally necessary to operate various mechanisms included in the X-ray machine to fix the patient's face in the correct position on the chin rest so that it does not tilt either in the front-back direction or in the left-right direction. be. Therefore, with conventional X-ray equipment in which the rotational center of the horizontal arm is fixed, when trying to take tomograms at different positions in an area, it is necessary to move the patient's face in accordance with the imaging area. However, according to the present invention, X-rays can be taken under the same motion trajectory without moving the patient's face as described above, making it extremely easy to operate. It has the advantage of being convenient.

[Brief explanation of the drawing]

FIG. 1 is an overall side view, and FIG. 2 is a vertical cross-sectional view of essential parts showing an embodiment of the invention. In the drawing, 1 is a fixed frame, 2 and 14 are bevel gears, 3 is a rotating shaft, 6 is a bearing sleeve, 7 is a motor, 10 is a motor mounting plate, 11 is a fixed sleeve,
15 is a holding plate, 16 is a stand, 17 is a screw shaft, 18 is a handle, 20 is a horizontal arm, 21 is a tube shaft, 22
is the film rotation axis.

Claims (1)

[Claims] 1 a fixed frame, a bearing sleeve extending vertically through the fixed frame and disposed so as to be movable horizontally by a required distance with respect to the fixed frame;
A rotating shaft is rotatably supported within the sleeve and rotationally driven by a drive motor integrally supported by the sleeve, and a rotating shaft is fixed to the lower end of the rotating shaft and has an X-ray irradiation tube at one end. , and a horizontal arm each having an X-ray film support tube at the other end;
Provided between the fixed frame and the bearing sleeve, the shaft bearing sleeve can be horizontally moved within the required distance with respect to the fixed frame by external operation to adjust the rotation center position of the horizontal arm with respect to the fixed frame. X characterized by being equipped with a moving mechanism that
Ray imaging device.