JPH08164133A - Jig for tubal ball exchange - Google Patents

Abstract

PURPOSE: To provide a jig for tubal ball exchange capable of easily exchanging an X-ray tubal ball without requiring a wide space. CONSTITUTION: This jig is constituted in such a way that a rotary shaft 11 mounted rotatably on a fixed part in an almost vertical direction, a first arm 17 mounted in a direction of right angles against the rotary shaft 11, and a second arm 18 connected to the tip of the first arm 17 and capable of rotating in a horizontal direction around the tip are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube replacement jig used when replacing an X-ray tube in an X-ray CT apparatus.

[0002]

2. Description of the Related Art In recent years, X-ray CT apparatuses have been widely used as medical diagnostic apparatuses have been developed. The X-ray CT apparatus allows an object to be invaded into a gantry having an X-ray tube and an X-ray detector which are arranged to face each other, and an X-ray emitted from the X-ray tube to an imaging target portion of the object. And the X-rays after passing through the subject are collected by the X-ray detector. And
This collected data is reconstructed to create an X-ray CT image for use in diagnosis.

The X-ray tube used in such an X-ray CT apparatus has a life of about 2-3 years and must be replaced every 2-3 years. However, the X-ray tube is usually 20
Since it has a weight of about 30 [Kg], it is difficult for the operator to replace it manually. Therefore, a tube replacement jig has been conventionally used to replace the X-ray tube. FIG. 5 is an explanatory diagram showing the internal configuration of the gantry of the X-ray CT apparatus. In the figure, only the vicinity of the X-ray tube 2 is shown in detail, and other parts are omitted for simplicity.

As shown in the figure, inside the gantry 1, an X-ray tube 2 fixed on a base plate 3 is arranged,
It is rotatable. Further, a dome 6 for invading the subject is formed in the center of the gantry 1. On the upper right side of the fixed portion of the gantry 1, a mounting portion 4 for mounting a tube replacement jig used when replacing the X-ray tube is formed.

FIG. 6 is a perspective view showing the structure of a conventional tube replacement jig. As shown in the drawing, the tube replacement jig includes a rotary shaft 11, bearings 12 and 13 for mounting the rotary shaft 11 to the mounting portion 4 of the gantry 1, and the rotary shaft 11 at the upper end thereof. The arm 14 is mounted at right angles to the arm 11, the hook 15 is mounted on the tip of the arm 14, and the rib 16 supports the load applied to the arm 14.

When the X-ray tube 2 is replaced, the tube replacement jig shown in FIG. 6 is attached to the mounting portion 4 of the gantry 1.
Then, the chain block is hung on the hook 15.
After that, the X-ray tube 2 is removed from the base plate 3, lifted by the chain block, and the rotary shaft 11 is rotated to determine the position where the X-ray tube 2 is lowered, and the chain block is operated to move the X-ray tube 2 onto the floor. Down to. And a replacement X
The tube 2 is attached to the base plate 3 in the reverse order of the above. By doing so, the X-ray tube 2 can be replaced manually.

[0007]

However, in such a conventional tube replacement jig, since the arm 14 is rotated while the X-ray tube 2 is suspended, a large radius of gyration is required and It requires a lot of space to replace the sphere. Further, since the rotation path of the arm is constant, when there are surrounding parts on this path, the X-ray tube 2 must be moved while avoiding this.
Further, since the tube replacement jig mounting portion 4 is located on the right side of the gantry 1, a space for replacement work must always be secured on the right side of the device, which is a constraint in arranging the device. Will end up.

The present invention has been made to solve such a conventional problem, and the object thereof is to easily replace the X-ray tube without being restricted by space. It is to provide a jig for tube replacement.

[0009]

In order to achieve the above object, the first invention of the present application is to attach and detach an X-ray tube mounted on a rotating portion of an X-ray CT apparatus having a rotating portion and a fixed portion. In a tube replacement jig to be used, a rotary shaft rotatably mounted on the fixed portion in a substantially vertical direction, a first arm mounted perpendicularly to the rotary shaft, and a first arm
A second arm that is connected to the tip of the arm and is horizontally rotatable about this tip.

A second aspect of the present invention is a tube exchange jig used for attaching and detaching an X-ray tube mounted on a rotating part of an X-ray CT apparatus having a rotating part and a fixed part, wherein the rotating part A rotation shaft rotatably attached to a predetermined portion of the section, a first arm attached in a direction perpendicular to the rotation axis, and a first arm that is connected to a tip portion of the first arm and is parallel to the first arm. A second arm rotatable in any direction. Further, a third invention of the present application is the second invention, wherein the rotating shaft is attached to a base plate for fixing the X-ray tube.

[0011]

According to the first invention of the present application constructed as described above, the arm for rotating the suspended X-ray tube is constructed by connecting the first arm and the second arm. It can rotate at the connecting part. Therefore, the path for moving the X-ray tube can be arbitrarily determined, and the interference with the peripheral parts can be easily avoided. Moreover, the radius of gyration can be reduced, and a large space is not required for X-ray tube replacement.

Further, according to the second and third inventions of the present application, since the tube replacement jig is attached to the rotating portion side of the X-ray CT apparatus, it is possible to adjust the stop position of the rotating portion. It can be attached and detached at any position. For example, when there is a large space on the right side of the apparatus, the X-ray tube may be stopped and replaced when the X-ray tube is on the right side.

[0013]

EXAMPLE A first example of the present invention will be described below. FIG. 1 is a perspective view showing the structure of a tube replacement jig according to the present invention. As shown in the drawing, the tube replacement jig includes a rotating shaft 11, bearings 12 and 13 for mounting the rotating shaft 11 to the mounting portion 4 of the gantry 1 shown in FIG. 5, and an upper end portion of the rotating shaft 11. A first arm 17 attached to the rotating shaft 11 in a direction perpendicular to the rotating shaft 11, and a first arm 17
Is a second arm 18 that is rotatably attached by a bolt 21, a fixing screw 20 that fixes the first arm 17 and the second arm 18 at a predetermined angle, and a fixing screw 20. It has stoppers 19 and ribs 16 that interfere so that the angle does not exceed 180 degrees. Also, the second
A hook 15 for suspending the chain block is attached to the tip of the arm 18 of the. Then, the tube replacement jig is fixed to the mounting portion 4 of the gantry 1 shown in FIG.

FIG. 2 shows a first arm 17 and a second arm 1.
It is explanatory drawing which shows the detail of the connection part with 8. As shown in the figure, the first arm 17 and the second arm 18 are rotatably supported by bolts 21a and 21b, and rotate about these axes. By rotating the fixing screw 20, the first arm 17 and the second arm 18 are brought into contact with each other, and the frictional force prevents rotation between the two arms.

By exchanging the X-ray tube using the tube exchanging jig thus constructed, the angle formed by the first arm 17 and the second arm 18 can be arbitrarily set. Therefore, it is possible to change the path along which the X-ray tube moves when replacing the tube, and avoid interference with other peripheral parts. Further, since the radius of gyration is not large, the X-ray tube can be easily replaced without requiring a large space.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the tube replacement jig shown in FIG. 1 is attached to the base plate of the X-ray tube provided on the rotating portion side of the X-ray CT apparatus. That is, as shown in FIG. 5, the X-ray tube 2 is fixed on the base plate 3 and the bolts 5a and 5b are attached to the base plate 3. Then, in this embodiment, the tube replacement jig is attached using the bolts 5a and 5b. That is, it is fixed to the positions of the bolts 5a and 5b of the base plate 3 by using the bolt holes of the bearings 12 and 13 shown in FIG.

FIG. 3 shows a state in which the tube replacement jig is attached by the above method in a state where the rotating part is rotated 90 degrees to the right. With such a configuration, the replacement work can be performed by the chain block 22 while the X-ray tube is rotated to the right, which is convenient when there is a large space on the right side of the device.

FIG. 4 shows a state in which the tube replacement jig is attached by the above method in a state where the rotating portion is rotated 90 degrees to the left. It should be noted that, in the figure, for simplicity, parts other than the X-ray tube 2 and the base plate 3 are not shown. With such a configuration, the replacement work can be performed with the chain block 22 while the X-ray tube is rotated to the left side, which is convenient when there is a large space on the left side of the apparatus.

In this way, according to the second embodiment, since the tube replacement jig is fixed to the base plate 3, X
The replacement work can be performed while the wire tube is rotated in the left-right direction, and a space suitable for the environment in which the device is installed can be used.

[0020]

As described above, according to the first invention of the present application, the arm for rotating the suspended X-ray tube is constituted by connecting the first arm and the second arm. ,
Since it is configured to be rotatable by this connecting portion, the path for moving the X-ray tube can be arbitrarily determined. Therefore,
Interference with peripheral parts can be easily avoided, and
Since the radius of gyration can be reduced, a large space is not required for X-ray tube replacement.

Further, according to the second and third inventions of the present application, since the tube replacement jig is attached to the rotating portion side of the X-ray CT apparatus, it is possible to adjust the stop position of the rotating portion to an arbitrary value. It can be attached and detached at any position. Therefore, the space used for tube replacement can be arbitrarily selected, and the operability is significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a tube replacement jig to which the present invention is applied.

FIG. 2 is an explanatory diagram showing a detailed configuration of a connecting portion between a first arm and a second arm.

FIG. 3 is an explanatory diagram showing a manner of attaching and detaching an X-ray tube on the right side of the apparatus according to the second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a manner of attaching and detaching an X-ray tube on the left side of the apparatus according to the second embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an internal configuration of a gantry of the X-ray CT apparatus.

FIG. 6 is a configuration diagram of a conventional tube replacement jig.

[Explanation of Codes] 1 Gantry 2 X-ray tube 3 Base plate 4 Mounting part 5a, 5b Bolt 6 Dome 11 Rotating shaft 12, 13 Bearing 14 Arm 15 Hook
16 ribs 17 first arm 18 second arm 19
Stopper 20 Fixing screw 21 Bolt 22 Chain block

Claims (3)

[Claims] 1. A tube replacement jig used when attaching and detaching an X-ray tube mounted on a rotating part of an X-ray CT apparatus having a rotating part and a fixed part, wherein the jig is rotated about the fixed part in a substantially vertical direction. A rotatable shaft, a first arm that is mounted in a direction perpendicular to the rotary shaft, and a first arm that is connected to the tip of the first arm and is horizontally rotatable about this tip. A jig for exchanging a tube, which has two arms. 2. A tube replacement jig used for attaching and detaching an X-ray tube mounted on a rotating part of an X-ray CT apparatus having a rotating part and a fixed part, which is rotatable to a predetermined part of the rotating part. A rotary shaft attached to the first rotary shaft and a first rotary shaft mounted in a direction perpendicular to the rotary shaft.
And the first arm connected to the tip of this first arm.
And a second arm that is rotatable in a direction parallel to the arm. 3. The tube replacement jig according to claim 2, wherein the rotating shaft is attached to a base plate for fixing the X-ray tube.