JPH0541506U - X-ray CT scanner scan - Google Patents

Abstract

(57) [Abstract] [Purpose] X-ray C that can reduce the wear of the brush in the scanner slip ring and extend its life.
Providing a scanner for a T-device. A scanner of an X-ray CT apparatus having a slip ring for bringing a brush and a rotating ring into contact with each other and transmitting and receiving a circuit signal between a non-rotating side and a rotating side, wherein the brush and the ring in the slip ring are A moving mechanism for moving the brush is provided that can release the contact state of the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a scanner for an X-ray CT apparatus, and more particularly to a scanner for an X-ray CT apparatus suitable for reducing the wear of the brush in the slip ring of the scanner and extending its life.

[0002]

[Prior Art]

 In the conventional X-ray CT apparatus, when the scan of the subject is started by the scanner, the ring of the slip ring connected to the X-ray tube device, the detector, etc. is rotated. It is configured to rotate continuously without stopping unless the operator's scan command signal does not continue for a predetermined time to the subject. This continuous rotation of the ring will reduce the scanning efficiency and increase the number of actuators if it accelerates or decelerates every time the scanning is repeated or the inspected part changes, etc. Only when the scan command is not continued for a predetermined time, the timer automatically stops. When a scan command signal is newly output, the rotation is restarted, and the above operation is repeated thereafter.

In this case, the brush is attached to a predetermined position so as to always maintain a contact state with the ring, and the brush worn by sliding with the ring is replaced with a new brush each time.

[0004]

[Problems to be solved by the device]

 Originally, the power supply from the non-rotating side to the rotating side through the slip ring and the transmission / reception of the circuit signal are performed only at the time of scanning and the preliminary stage of scanning, and need not be performed in other cases. Is. However, as described above, in the past, the brush in slip ring always maintains a contact state with the ring, while the ring continuously rotates except when the scan is completed or when the scan command does not continue for a predetermined time. Therefore, the brushes will continue to wear due to the sliding of both parties. Therefore, there is a problem that abrasion of the brush is promoted and the life is shortened.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a scanner for an X-ray CT apparatus capable of reducing wear of a brush in a slip ring of a scanner and extending its life. And

[0006]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a scanner of an X-ray CT apparatus including a slip ring for bringing a brush and a ring on the rotating side into contact with each other and transmitting and receiving a circuit signal between the non-rotating side and the rotating side. A configuration is provided in which a moving mechanism for brush movement that can release the contact state between the brush and the ring in the slip ring is arbitrarily provided.

[0007]

[Action]

 With the above configuration, if it is not necessary to supply power and send / receive circuit signals from the non-rotating side to the rotating side via the slip ring, the brush and ring contact via the brush moving mechanism. It is possible to release the condition and prevent both from sliding. Therefore, even if the ring continuously rotates, the contact between the brush and the ring is limited to the time of scanning and the preliminary stage of scanning, and the sliding state of the two is reduced compared to the case of the conventional constant contact. It becomes possible to reduce the abrasion of the brush.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a front view of a scanner of an X-ray CT apparatus, and FIG. 2 is a detailed sectional view taken along line I-I-I-I. In the figure, 1 is a rotary disc to which a ring 2 is fixed, 3 is a main frame on which a rotary disc 1 is rotatably mounted via a bearing 4, and the main frame 3 is a stand 5a via bearings 6a and 6b. 5b is tiltably supported. Reference numeral 7 denotes a pulley fixed to the rotary disk 1, which is rotated together with the rotary disk 1 via a belt 9 by driving a motor 8. Reference numeral 10 is a brush arranged so as to face the ring 2, and the brush 10 is attached to a brush mounting member 11. Reference numeral 12 is a solenoid connected to the brush mounting tool 11. By expanding and contracting a rod 12a of the solenoid 12, the brush 10 is moved together with the brush mounting metal fitting 11 so that the brush 10 and the ring 2 come into contact with each other or contact with each other. It is possible to release it arbitrarily. Reference numeral 13 is a linear movement guide for moving the brush mounting member 11, and 14 is a solenoid mounting member for holding the solenoid 12, which is fixed to the main frame 3. Reference numeral 15 is a CPU connected to the solenoid 12, and 16 is an operation table connected to the CPU 15.

Next, the operation of the above configuration will be described. When a scanning command is sent from the operation table 16 to the CPU 15, the solenoid 12 operates and the rod 12a extends, and the brush fitting 11 is moved to the ring 2 side along the linear movement guide 13. As a result, the brush 10 that has been rotating in a non-contact state with the ring 2 comes into contact with the ring 2, enabling power supply and circuit signal transmission / reception from the non-rotation side to the rotation side, and scanning of the subject is started. .

When the scanning is completed, a command for ending the scanning is transmitted from the operation table 16 to the solenoid 12 via the CPU 15 to shorten the rod 12a. Due to this shortening, the contact state between the brush 10 and the rotating ring 2 is released, and the ring 2 continues to rotate, but the contact between the brush 10 and the ring 2 is released and the two do not slide. Be in a state. As described above, even when the ring 2 is continuously rotating, the contact between the brush 10 and the ring 2 is limited to the time of scanning and the preliminary stage of scanning, which is different from the conventional case of constant contact. It is possible to reduce the sliding state of the both, reduce the wear of the brush 10, and extend the life.

[0011]

[Effect of the device]

 As described above, according to the present invention, in the scanner of the X-ray CT apparatus, since the moving mechanism for moving the brush that can release the contact state between the brush and the ring in the slip ring is provided, the abrasion of the brush It has the effect of reducing the noise and extending its life.

[Brief description of drawings]

FIG. 1 is a front view of a scanner of an X-ray CT apparatus showing an embodiment of the present invention.

FIG. 2 is a detailed sectional view taken along the line ΙΙ-ΙΙ in FIG.

[Explanation of symbols]

 1 Rotating Disc 2 Ring 3 Main Frame 7 Pulley 10 Brush 11 Brush Mounting Bracket 12 Solenoid 12a Solenoid Rod 15 CPU 16 Operation Table

Claims (1)

[Scope of utility model registration request] 1. A scanner of an X-ray CT apparatus comprising a slip ring for bringing a brush and a ring on the rotating side into contact with each other and transmitting and receiving a circuit signal between the non-rotating side and the rotating side, wherein the brush on the slip ring is A scanner for an X-ray CT apparatus, which is provided with a moving mechanism for moving a brush, which can release a contact state with a ring arbitrarily.