JP2010136977A - Bed for medical diagnosis and x-ray diagnostic apparatus including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bed for medical diagnosis for reliably braking and holding the rotation of a top board and attaining downsizing, and to provide an X-ray diagnostic apparatus including the bed for medical diagnosis. <P>SOLUTION: The bed 10 for medical diagnosis includes: the top board 11; a base 14 for holding the top board 11; an installation part 15 placed on a floor surface; and a bearing 20 arranged between the base 13 and the installation part 15 so as to rotatably support the base 14 and the top board 11 with respect to the installation part 15 by making a rotary center axis CL as a center. The bearing 20 includes: an outer race 21; an inner race 22; a rolling body 23 to be arranged between the outer race 21 and the inner race 22; a brake mechanism 30 for generating braking force to prevent the relative movement between the outer race 21 and the inner race 22. The brake mechanism is arranged more on the inner side from the outer peripheral surface of the outer race. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a medical diagnostic bed such as an X-ray circulatory diagnostic bed for placing a subject (patient) and an X-ray diagnostic apparatus including a medical diagnostic bed.

  For example, an X-ray diagnostic apparatus as a medical diagnostic apparatus includes a bed for holding a subject in a laid state (see, for example, Patent Document 1). 6 (A) and 6 (B) show a conventional medical diagnostic couch, this type of couch is a couchtop 200 for laying a subject and a bearing 201 for rotating the couchtop 200. FIG. And two sets of brakes 203 and a stand cover 204.

The top plate 200 can be rotated about a rotation center axis using a bearing 201. The brake 203 has a function of holding the top plate 200 so as not to rotate in the R direction or releasing it so as to rotate in the R direction. The bearing 201 includes an inner ring, an outer ring, and rolling elements disposed between the inner ring and the outer ring. As shown in FIG. 6 (A), for example, two sets of brakes 203 are provided at positions facing each other along the diametrical direction of the bearing 201 at positions apart from the outer ring of the bearing 201.
JP 2008-99800 A

  By the way, the moment of inertia generated during the rotation of the top plate is increasing as the weight of the bed is increased and the load bearing capacity is improved. Therefore, the performance of the brake that brakes or holds the rotation of the top plate is required to be stronger than before. Moreover, as described above, the two sets of brakes 203 are provided at positions facing each other along the diametrical direction of the bearing 201 at positions away from the outer periphery of the outer ring of the bearing 201. In this way, the two sets of brakes 203 are arranged outside the bearing 201, and an increase in the size of the bed is unavoidable, and the stand cover 204 for covering the bed is increased in size. The foot space is narrowed. Therefore, when the subject gets on the top board, the accessibility of the subject is deteriorated. In addition, there is a problem that the arm having the X-ray tube and the X-ray detector is difficult to approach the bed and the X-ray irradiation range is limited.

  The present invention has been made in view of the above, and an object of the present invention is to provide a medical diagnostic bed and a medical diagnostic bed that can reliably hold the rotation of the top board and can be downsized. An X-ray diagnostic apparatus is provided.

The invention according to claim 1 is the medical diagnostic bed according to the present invention, wherein the top plate, the base for holding the top plate, the installation part placed on the floor surface, and between the base and the installation part And a bearing that rotatably supports the base and the top plate with respect to the installation portion about a rotation center axis. The bearing includes an outer ring, an inner ring, the outer ring, and the inner ring. A rolling element disposed between and a brake mechanism unit that generates a braking force that prevents relative movement between the outer ring and the inner ring,
The brake mechanism section includes an actuator that presses a friction member against an outer peripheral surface of the inner ring.

  The invention according to claim 6 is the X-ray diagnostic apparatus including the medical diagnostic couch of the present invention, characterized in that the medical diagnostic couch is provided.

  According to the present invention, it is possible to provide an X-ray diagnostic apparatus including a medical diagnostic bed and a medical diagnostic bed that can reliably hold and rotate the top plate and can be downsized. .

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an X-ray cardiovascular diagnostic apparatus having a preferred embodiment of a medical diagnostic couch of the present invention. An X-ray cardiovascular diagnostic apparatus 1 shown in FIG. 1 is an example of an X-ray diagnostic apparatus or a medical diagnostic apparatus.

An X-ray cardiovascular diagnostic apparatus 1 shown in FIG. 1 includes a medical diagnostic bed (hereinafter referred to as a bed) 10 and an X-ray imaging apparatus 2. The bed 10 is configured to put a subject P on the bed 10
As shown in FIG. 1, the X-ray imaging apparatus 2 includes a C-shaped arm 3 and a main body 4. The main body 4 can approach or move away from the bed 10 along the rail 9 on the floor surface F.

  The arm 3 can be positioned with respect to the main body 4 by rotating around the rotation center shaft 8 by the rotation shaft portion 7. An X-ray tube 5 that irradiates X-rays is provided at one end of the arm 3, and an X-ray detector 6 that detects X-rays is provided at the other end of the arm 3. In this X-ray imaging apparatus 2, the X-ray tube 5 irradiates the subject P on the bed 10 with X-rays and detects the X-ray transmitted through the subject P by the X-ray detector 6.

  FIG. 2 shows the bed 10 of FIG. FIG. 2A is a plan view of the bed 10, and FIG. 2B is a front view of the bed 10.

  As shown in FIG. 2, the bed 10 includes a top plate 11, a top plate support unit 12, a tilt operation unit 13, a base 14, a bearing 20 as a rotation mechanism unit, an installation unit 15, and a stand cover 40. Is provided.

  As shown in FIGS. 1 and 2B, the installation unit 15 is installed on the floor surface F. As shown in FIG. 2 (B), the top plate supporter 12 supports the top plate 11 so as to be slidable along the D direction. The tilt operation unit 13 is provided on the upper part of the base 14, and the tilt operation unit 13 can position the top plate support unit 12 and the top plate 11 by tilting in the rotation direction T about the rotation center C. .

  As shown in FIG. 2B, the bearing 20 is set between the installation portion 15 and the base 14. The bearing 20 is configured to position an assembly unit of the top plate support portion 12, the top plate 11, the tilt operation portion 13, and the base 14 by rotating in the R direction about the rotation center axis CL.

  FIG. 3 shows an example of the structure of the bearing 20 of the bed 10.

  The bearing 20 shown in FIG. 3 has an outer ring 21, an inner ring 22, and a plurality of rolling elements 23. As an example, the outer ring 21 is fixed to the lower part of the base 14, and the inner ring 22 is fixed to the cylindrical member 16 of the installation portion 15. The plurality of rolling elements 23 are disposed between the outer ring 21 and the inner ring 22 so that the outer ring 21 can rotate about the rotation center axis CL with respect to the inner ring 22.

  Further, as shown in FIG. 3, a brake mechanism 30 is built in the outer ring 21. The brake mechanism 30 is installed within the range of the outer ring thickness M of the outer ring 21 and does not protrude at all from the outer surface of the outer ring 21. The brake mechanism unit 30 generates a braking force that prevents relative movement between the outer ring 21 and the inner ring 22.

  4 is an enlarged cross-sectional view of a portion W of the bearing 20 of FIG.

  Referring to the portion W of the bearing 20 shown in FIG. 4, the brake mechanism unit 30 includes a hydraulic cylinder 31, a first friction member 32, and a second friction member 33. The hydraulic cylinder 31 is disposed in a housing space 34 formed in the outer ring 21. A first friction member 32 is fixed to the tip of the rod 35 of the hydraulic cylinder 31. On the other hand, the second friction member 33 is fixed to the outer peripheral surface 36 of the inner ring 22. The second friction member 33 is a belt-like member and is fixed over the entire periphery of the outer peripheral surface 36 of the inner ring 22.

  Ports 37 and 38 of the hydraulic cylinder 31 shown in FIG. 4 are connected to the hydraulic pressure generator 101. In response to a command from the control unit 100, the hydraulic pressure generation unit 101 sends hydraulic oil into the hydraulic cylinder 31 through the port 38, so that the rod 35 extends in the V direction, and the first friction member 32 becomes the second friction member 33. It can be pressed against. Thereby, the brake mechanism part 30 can brake the rotation of the assembly unit of the outer ring 21, the base 14, the top plate 11, and the top plate support part 12 and maintain the braking state.

  Further, the hydraulic pressure generating unit 101 shown in FIG. 4 sends the hydraulic oil into the hydraulic cylinder 31 through the port 37 in response to a command from the control unit 100, so that the rod 35 contracts in the direction opposite to the V direction. The friction member 32 can be separated from the second friction member 33. Thereby, the brake mechanism part 30 cancels | releases the state holding the assembly unit of the outer ring | wheel 21, the base 14, and the top-plate support part 12 of the top plate 11, and the outer ring | wheel 21, the base 14, the top plate 11, and the top plate The assembly unit of the support portion 12 can be released from the inner ring 22 and the assembly unit can be rotated about the rotation center axis CL.

  For example, as shown in FIG. 2 (A), the two brake mechanism portions 30 are arranged at positions opposed to the outer ring 21 of the bearing 20 every 180 degrees around the rotation center axis CL of FIG. . Since the plurality of brake mechanism portions 30 are arranged at opposite positions around the rotation center axis CL, the load applied from the outer ring 21 to the inner ring 22 by the brake mechanism 30 is only applied to the inner side in the radial direction. The extra load is not applied to the moving body 23.

  The moment of inertia generated during the rotation of the top plate has increased with the increase in weight and load-bearing capacity due to the improved function of the bed, but the performance of the brake that brakes or holds the rotation of the top plate has so far been improved. In order to make it more powerful than that, it can be dealt with by increasing the number of brake mechanism sections.

  In addition, since the brake mechanism 30 is disposed inside the outer ring 21 and does not protrude outward from the outer peripheral surface of the outer ring 21, the bed can be reduced in size, and the stand cover 204 for covering the bed can be reduced in size. I can plan. For this reason, the foot space of the bed can be widened, and the accessibility of the subject is improved when the subject gets on the top board. In addition, the arm having the X-ray tube and the X-ray detector can easily approach the bed, and the X-ray irradiation range is expanded.

  Next, another embodiment of the brake mechanism of the present invention will be described with reference to FIG.

  FIG. 5 is a diagram showing another embodiment of the brake mechanism portion of the present invention. FIG. 5 shows a state in which the brake mechanism 30 </ b> R brakes and holds the outer ring 21 against the inner ring 22.

  In the accommodation space 134 of the outer ring 21, a spring 120 such as a disc spring, an electromagnetic actuator 121, and a pressing member 125 are accommodated. The rod 129 of the electromagnetic actuator 121 is fixed to the pressing member 125. A first friction member 132 is disposed on the pressing member 125, and a second friction member 133 is disposed on the outer peripheral surface of the inner ring 22. The force of the spring 120 presses the first friction member 132 of the pressing member 125 against the second friction member 133 on the outer peripheral surface side of the inner ring 22. As a result, the brake mechanism 30 </ b> R can maintain a state where the outer ring 21 is braked with respect to the inner ring 22.

  However, when the control unit 100 energizes the electromagnetic actuator 121 and operates the electromagnetic actuator 121, the rod 129 of the electromagnetic actuator 121 is contracted and the first friction member 132 is separated from the second friction member 133 in the H direction. it can. As a result, the state in which the assembly unit of the outer ring 21, the base 14, the top plate 11, and the top plate support portion 12 is held is released, and the unit of the outer ring 21, the base 14, the top plate 11, and the top plate support portion 12 , And can be rotated about the rotation center axis CL.

  Such a brake mechanism part is called an off-lock type brake mechanism part, and keeps the braking state of the outer ring 21 and the inner ring 22 in a normal state, and the braking state only when it is desired to release the braking state of the outer ring 21 and the inner ring 22. Can be canceled. By using the spring 120 and the electromagnetic actuator 121, the force of the spring 120 can be prevented from being relatively rotated between the outer ring 21 and the inner ring 22 in the event of a power failure or failure, so that safety can be ensured.

  The medical diagnostic couch of the present invention is provided with a top plate, a base for holding the top plate, an installation unit placed on the floor, and a base and the top plate installed between the base and the installation unit. A bearing that is rotatably supported about a rotation center axis with respect to the portion, and the bearing is a relative of the outer ring, the inner ring, a rolling element disposed between the outer ring and the inner ring, and the outer ring and the inner ring. And a brake mechanism that generates a braking force that prevents general movement, and the brake mechanism includes an actuator that presses the friction member against the outer peripheral surface of the inner ring. Thereby, the rotation of the top plate can be reliably braked and held, and the medical diagnostic bed can be downsized.

  In the medical diagnostic couch of the present invention, the brake mechanism is arranged in an accommodation space formed in the outer ring. As a result, the brake mechanism does not protrude at all on the outer side of the outer ring, so that the size of the medical diagnostic bed can be reduced.

  In the medical diagnostic bed of the present invention, the brake mechanism section includes the fluid pressure actuator, the first friction member provided on the rod of the fluid pressure actuator, and the rod of the fluid pressure actuator provided on the outer peripheral surface of the inner ring. And a second friction member against which the first friction member is pressed. Thereby, it is possible to reliably brake and hold the rotation of the top plate using only the first friction member and the second friction member only by operating the fluid pressure actuator.

  In the medical diagnostic couch of the present invention, the brake mechanism section includes the pressing member having the first friction member, the second friction member provided on the outer peripheral surface of the inner ring, and the second friction member via the pressing member. A spring that presses against the friction member; and an actuator that moves the pressing member against the force of the spring to separate the first friction member from the second friction member. As a result, the braking state between the outer ring and the inner ring can be maintained normally, and the braking state can be released only when it is desired to release the braking state between the outer ring and the inner ring. By using the spring and the actuator, the spring can prevent and hold the outer ring from rotating with respect to the inner ring in the event of a power failure or failure, so that safety can be ensured.

  In the medical diagnostic couch of the present invention, the plurality of brake mechanism portions are arranged apart from each other by the same angle about the rotation center axis. Thereby, an extra load is not applied to the rolling elements of the bearing.

  The X-ray diagnostic apparatus provided with the medical diagnostic couch of the present invention is characterized by including a medical diagnostic couch. Thereby, the rotation of the top board can be reliably braked and held, the medical diagnostic bed can be downsized, and the X-ray diagnostic apparatus can be downsized.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  As shown in FIG. 2, the two brake mechanism portions 30 are disposed at diagonal positions every 180 degrees in the outer ring 21 of the bearing 20 around the rotation center axis CL. However, for example, the three brake mechanism portions may be arranged every 120 degrees in the outer ring 21 of the bearing 20 around the rotation center axis CL. Thus, since the several brake mechanism part 30 is arrange | positioned in the opposing position centering | focusing on the rotation center axis | shaft CL, it can avoid applying an extra load with respect to the rolling element 23. FIG. The number of brake mechanism units 30 arranged is not limited to two or three, but may be one or four or more.

  Further, the brake mechanism portion may be disposed in the inner ring 22 instead of being disposed in the outer ring 21. In this case, the brake mechanism unit presses the inner peripheral surface of the outer ring 21 from the inner ring 22 side to realize a braking state between the outer ring and the inner ring. Even when the brake mechanism portion is arranged in the inner ring 22 in this way, the brake mechanism portion does not protrude outward from the outer peripheral surface of the outer ring 21.

  For example, some components may be deleted from all the components shown in the above-described embodiment. Furthermore, you may combine the component covering different embodiment suitably. Moreover, in the above-mentioned embodiment, although various numerical values are mentioned, those numerical values are illustrations and are not limited.

1 is a perspective view showing an X-ray cardiovascular diagnostic apparatus having a preferred embodiment of a medical diagnostic bed of the present invention. 1 is a plan view of the bed, and FIG. 2B is a front view of the bed. It is a figure which shows the structural example of a bearing. It is sectional drawing which expands and shows the part W of the bearing of FIG. It is a figure which shows another embodiment of the brake mechanism part of this invention. It is a figure which shows the conventional bed.

Explanation of symbols

1 X-ray cardiovascular diagnostic device (an example of a medical diagnostic device)
2 X-ray imaging apparatus 10 Medical diagnostic bed (bed)
DESCRIPTION OF SYMBOLS 11 Top plate 12 Top plate support part 13 Tilt operation part 14 Base 15 Installation part 20 Bearing 21 Outer ring 22 Inner ring 30 Brake mechanism part 31 Hydraulic cylinder 32 1st friction member 33 2nd friction member 34 Storage space part 35 Rod 101 Oil pressure generation Part CL Center of rotation P Subject

Claims (6)

With the top plate,
A base for holding the top plate;
An installation section placed on the floor;
A bearing that is provided between the base and the installation part and supports the base and the top plate so as to be rotatable about the rotation center axis with respect to the installation part;
The bearing includes an outer ring, an inner ring, a rolling element disposed between the outer ring and the inner ring, and a brake mechanism unit that generates a braking force that prevents relative movement between the outer ring and the inner ring, Have
The bed for medical diagnosis, wherein the brake mechanism unit includes an actuator that presses a friction member against an outer peripheral surface of the inner ring.   2. The medical diagnostic bed according to claim 1, wherein the brake mechanism is disposed in a housing space formed in the outer ring.   The brake mechanism section includes the fluid pressure actuator, a first friction member provided on a rod of the actuator, and an outer peripheral surface of the inner ring, and the rod of the actuator moves to move the first friction. The medical diagnostic couch according to claim 1, further comprising a second friction member against which the member is pressed.   The brake mechanism portion presses the first friction member against the second friction member via the pressing member having the first friction member, the second friction member provided on the outer peripheral surface of the inner ring, and the pressing member. 3. The actuator according to claim 1, further comprising: a spring; and the actuator that moves the pressing member against a force of the spring to separate the first friction member from the second friction member. Medical diagnostic bed as described.   The medical diagnostic couch according to any one of claims 1 to 4, wherein the plurality of brake mechanism portions are arranged apart from each other by the same angle about the rotation center axis.   The X-ray diagnostic apparatus according to claim 1, further comprising the medical diagnostic couch.

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