JP2010213921A - Rotary irradiation therapy equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized lightweight rotary irradiation therapy equipment having a beam transportation device, that contains a superconductive deflection electromagnet, with a simple structure. <P>SOLUTION: The freezer-use compressor 7 is rotatably installed on a rotary frame 3 to be rotatable around the rotation axis R<SB>2</SB>in parallel with the first rotation axis R<SB>1</SB>of the rotary frame 3. While the rotary frame 3 is rotated by a rotary frame support driving device 25 with a first angular velocity, the freezer-use compressor 7 rotates around the rotary frame 3 with a second angular velocity that is the same with the first angular velocity but reversed in direction. Accordingly, it is possible to maintain a constant position of the freezer-use compressor 7 at all times during the rotation of the rotary frame 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotary irradiation treatment apparatus using a medical particle beam, and more particularly to a rotary irradiation treatment apparatus that irradiates a patient with a particle beam from an arbitrary angle by rotating around the patient.

  In recent years, the use of particle beams has attracted attention in radiation therapy for cancer patients. In radiotherapy using particle beams, the most intense dose should be given to the affected area located deep in the body compared to conventional radiotherapy using X-rays, gamma rays, electron beams, and neutrons. Therefore, it is possible to perform treatment without relatively damaging normal cells located on the body surface and around the affected part. As the particle beam, a heavy particle beam such as a proton beam or a carbon beam obtained by accelerating to high energy is mainly used.

  Conventionally, as a treatment apparatus using such a particle beam, a treatment apparatus that fixes the particle beam irradiation unit and irradiates the patient with the particle beam only from one fixed direction has been mainstream. However, in recent years, there is an increasing demand for a treatment apparatus that can irradiate a patient with a particle beam from multiple directions so as to obtain an optimal dose value and dose distribution according to the shape and depth of cancer. For this reason, a rotation irradiation treatment apparatus that irradiates a patient with a particle beam from an arbitrary angle in the circumferential direction by rotating around the patient has been developed (for example, Patent Documents 1 and 2).

  A rotary irradiation treatment apparatus that irradiates a particle beam is generally configured as an apparatus that irradiates a patient with a charged particle beam accelerated to high energy by a synchrotron. For example, the rotary irradiation treatment apparatus includes a rotating frame (rotating gantry) that can rotate around a patient, and a charged particle beam accelerated to high energy by a synchrotron is guided toward the rotation center of the rotating frame. The charged particle beam guided in the direction of the rotation center of the rotating frame is once bent outward by the beam transport device provided with the normal conducting deflection electromagnet, and then bent inward again and guided to the treatment room. The charged particle beam guided to the treatment room is irradiated to the patient from the particle beam irradiation unit.

  In this case, the trajectory radius of the beam trajectory until the charged particle beam is guided to the treatment room mainly depends on the magnetic field intensity generated by the normal conducting deflection electromagnet. For this reason, as the magnetic field strength increases, the charged particle beam can be deflected with a small orbit radius. Therefore, the outermost diameter of the rotating frame as a rotating body largely depends on the strength of the magnetic field generated by the normal conducting deflection electromagnet.

JP 11-47287 A JP-A-9-192244

  In order to irradiate a patient with a charged particle beam with high accuracy, it is necessary to control the rotation of a rotating frame (rotating gantry) with high accuracy. In general, it is difficult to control the rotation with high accuracy as the outermost diameter of the rotating frame increases and the weight of the rotating particle and the charged particle beam provided inside the rotating frame increases. However, when a conventional beam transport device provided with a normal conducting deflection electromagnet is used, the orbit radius of the beam trajectory increases because the magnetic field generated by the normal conducting deflection magnet is limited. This increases the outermost diameter of the rotating frame, which also increases the weight of the rotary irradiation therapy device. For this reason, it is difficult to control the rotation with high accuracy, and the cost of the rotary irradiation treatment apparatus increases. Furthermore, as the rotary irradiation treatment apparatus becomes larger, the space for installing the rotation irradiation treatment apparatus also increases.

  In order to solve such a problem, it is conceivable to replace the normal conducting deflection electromagnet of the beam transport device with a superconducting deflection electromagnet. Replacing the normal conducting deflecting magnet with a superconducting deflecting magnet increases the magnetic field generated, thereby reducing the trajectory radius of the beam trajectory. This also reduces the outermost diameter of the rotating frame, thereby reducing the weight of the rotary irradiation treatment apparatus.

  However, when using a beam transport device provided with a superconducting deflection electromagnet, a refrigerator for cooling the superconducting deflection electromagnet and a compressor for a refrigerator for supplying refrigerant to the refrigerator via a flexible hose are required. In general, a compressor for a refrigerator is designed on the assumption that it is used in a state in which a constant posture is always maintained. Therefore, when using a superconducting deflecting electromagnet in a rotary irradiation therapy apparatus, the refrigerator compressor must be arranged so that the posture of the refrigerator compressor is kept constant regardless of the rotation of the rotating frame.

  However, for example, when a compressor for a refrigerator is arranged outside the rotating frame and thereby maintains the attitude of the compressor for the refrigerator regardless of the rotation of the rotating frame, the compressor for the refrigerator is fixed to the refrigerator fixed to the rotating frame. In order to supply the refrigerant from the machine, the compressor for the refrigerator must be connected to the refrigerator by a flexible hose having a length of several tens to hundreds of meters. When such a long flexible hose is used, the cost increases and the cooling efficiency by the refrigerator may be deteriorated. In addition, a mechanism for preventing the flexible hose from being tangled during the rotation of the rotating frame is required, which complicates the structure of the rotary irradiation treatment apparatus.

  The present invention has been made in consideration of such points, and provides a small and lightweight rotary irradiation treatment apparatus by installing a beam transport apparatus provided with a superconducting deflection electromagnet with a simple configuration. With the goal.

  The present invention relates to a rotatable rotating frame, a particle beam irradiation unit that is attached to the rotating frame and irradiates a charged particle beam, and beam transport that is attached to the rotating frame and guides the charged particle beam to the particle beam irradiation unit. An apparatus, a rotating frame support driving device that rotatably supports the rotating frame, and rotates the rotating frame around a first rotation axis; and a control device that controls the beam transport device and the rotating frame support driving device. The beam transport device includes a vacuum duct having a straight portion and a curved portion for guiding a charged particle beam to the particle beam irradiation unit, and a superconducting deflection electromagnet provided on an outer periphery of the curved portion of the vacuum duct, A refrigerator is provided for cooling the superconducting deflection electromagnet, and a refrigerator compressor for supplying a compressed refrigerant to the refrigerator is provided. The compressor for a machine is attached to the rotating frame so as to be rotatable around a second rotating shaft parallel to the first rotating shaft of the rotating frame so as to keep the posture of the compressor for the refrigerator constant. It is the rotation irradiation treatment apparatus characterized.

  The present invention is characterized in that an inertial mass body that generates an inertial force in a direction opposite to the acceleration according to the acceleration acting on the refrigerator compressor is attached below the compressor for the refrigerator. Rotating irradiation treatment device.

  According to the present invention, the compressor for the refrigerator is attached to a rotating frame so as to be rotatable by a compressor driving unit using the second rotating shaft as a rotating shaft, and the controller rotates the rotating frame at a first angular velocity. And controlling the rotating frame support drive device so that the compressor for rotation rotates at a second angular velocity that is the same in magnitude and opposite in direction to the first angular velocity with respect to the rotating frame. It is a rotary irradiation treatment apparatus characterized by controlling a machine drive unit.

  The present invention is the rotary irradiation therapy apparatus, wherein the compressor for the refrigerator is attached to the rotary frame via an annular guide rail fixed to the rotary frame.

  According to the present invention, the compressor for the refrigerator is fixed to a cart frame, and the cart frame is attached to the rotating frame via an annular guide rail fixed to the rotating frame. It is an irradiation treatment apparatus.

  In the present invention, the guide rail has a groove having a concave cross section on the inner peripheral surface thereof, and a wheel that moves along the groove is attached to the compressor for the refrigerator. It is a rotary irradiation treatment device characterized by being driven by.

  According to the present invention, the guide rail has a groove portion having a concave cross section on a side surface thereof, and a wheel that moves along the groove portion is attached to the compressor for the refrigerator, and the wheel is driven by the compressor driving portion. It is the rotary irradiation treatment apparatus characterized by being performed.

  According to the present invention, the guide rail has a groove portion having a concave cross section on an inner peripheral surface thereof, and a wheel that moves along the groove portion is attached to the carriage frame, and the wheel is driven by the compressor driving portion. This is a rotary irradiation treatment apparatus.

  In the present invention, the guide rail has a groove having a concave cross section on a side surface thereof, and a wheel that moves along the groove is attached to the carriage frame, and the wheel is driven by the compressor driving unit. Is a rotary irradiation treatment device characterized by

  The present invention is the rotary irradiation treatment apparatus characterized in that the wheel is formed of a gear and an uneven portion that engages with the gear is formed in a groove portion of the guide rail.

  In the present invention, the compressor for the refrigerator is fixed to a rotary drive body that rotates in the annular guide rail, and is driven by the compressor drive unit between the annular guide rail and the rotary drive body. It is a rotary irradiation treatment apparatus characterized by interposing a drive wheel.

  In the present invention, the carriage frame is fixed to a rotary driving body that rotates in the annular guide rail, and a drive wheel that is driven by the compressor driving unit is provided between the annular guide rail and the rotary driving body. This is a rotary irradiation treatment apparatus characterized by being interposed.

  The present invention is the rotary irradiation treatment apparatus characterized in that the center of gravity of the refrigerator compressor is on a line extending downward in the vertical direction from the rotation axis of the compressor for the refrigerator.

  According to the present invention, the compressor for the refrigerator that supplies the compressed refrigerant to the refrigerator that cools the superconducting deflection electromagnet can rotate around the second rotation axis that is parallel to the first rotation axis of the rotation frame. Installed on. For this reason, during the rotation of the rotating frame, the attitude of the compressor for the refrigerator can always be kept constant, whereby the compressor for the refrigerator can be arranged inside the rotating frame. As a result, a small and lightweight rotary irradiation treatment apparatus can be provided with a simple configuration.

FIG. 1 is a partially broken front view showing a rotary irradiation treatment apparatus according to a first embodiment of the present invention. FIG. 2 is a front view showing the compressor for the refrigerator in the first embodiment of the present invention. FIG. 3 is a side view showing the compressor for the refrigerator in the first embodiment of the present invention. FIG. 4 is a front view showing a modification in which the refrigerator compressor is fixed to the carriage frame in the first embodiment of the present invention. FIG. 5: is a front view which shows the compressor for refrigerators in the 2nd Embodiment of this invention. 6A is a cross-sectional view of the refrigerator compressor shown in FIG. 5 as viewed from the direction AA, and FIG. 6B is a view of the refrigerator compressor shown in FIG. 5 from the direction BB. Viewed longitudinal section. FIG. 7 is a view showing a modification in which the wheel is a gear in the second embodiment of the present invention. FIG. 8A is a front view showing a compressor for a refrigerator in the third embodiment of the present invention, and FIG. 8B is a compressor for the refrigerator in the third embodiment of the present invention. FIG. FIG. 9 is a side view showing a compressor for a refrigerator according to a fourth embodiment of the present invention. FIG. 10 (a) is a partially broken front view showing a rotary irradiation treatment apparatus in the fifth embodiment of the present invention, and FIG. 10 (b) is a compressor for a refrigerator in the fifth embodiment of the present invention. FIG.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
1 to 4 are diagrams showing a rotary irradiation treatment apparatus in the first embodiment of the present invention. Among these, FIG. 1 is a partially broken front view showing the rotary irradiation treatment apparatus in the first embodiment of the present invention, and FIG. 2 shows the compressor for the refrigerator in the first embodiment of the present invention. It is a front view. FIG. 3 is a side view showing the compressor for the refrigerator in the first embodiment of the present invention. FIG. 4 shows the compressor for the refrigerator in the first embodiment of the present invention. It is a front view which shows the modified example fixed.

  First, referring to FIG. 1, the entire rotary irradiation treatment apparatus 1 in the present embodiment will be described.

As shown in FIG. 1, a rotary irradiation treatment apparatus 1 installed in a building 12 is attached to a truss-like rotary frame (rotary gantry) 3 that is rotatably provided and a rotary frame 3. A particle beam irradiation unit 2 for irradiation and a beam transport device 30 that is attached to the rotating frame 3 and guides a charged particle beam to the particle beam irradiation unit 3 are provided. The rotating frame 3 rotates around the first rotation axis R ₁ , and the rotating frame 3 is rotatably supported by the rotating frame support driving device 25. The rotating frame support driving device 25 supports the rotating rings 10a and 10b fixed to both ends of the rotating frame 3 and the corresponding rotating rings 10a and 10b, and also supports and rotates the corresponding rotating rings 10a and 10b. Frame support portions) 11a and 11b. For this reason, the rotating frame 3 is rotated by the support rolls 11a and 11b.

  As shown in FIG. 1, a treatment room 20 having a treatment bed 21 is provided in the vicinity of the particle beam irradiation unit 2 in the rotary frame 3. The treatment room 20 maintains its posture even when the rotary frame 3 rotates.

  Next, the beam transport device 30 will be described in detail with reference to FIG. As shown in FIG. 1, the beam transport device 30 is provided on the outer periphery of the vacuum duct 18 that guides the charged particle beam to the particle beam irradiation unit 2 and has the straight portion 18 a and the curved portion 18 b, and the straight portion 18 a of the vacuum duct 18. And a superconducting deflection electromagnet 4 provided on the outer periphery of the curved portion 18b of the vacuum duct 18 for converging the beam size of the charged particle beam, and a refrigerator for cooling the superconducting deflection electromagnet 4 19 is provided. A compressed refrigerant such as helium gas is supplied to the refrigerator 19 from the compressor 7 for refrigerator shown in FIG. By such a beam transport device 30, a charged particle beam accelerated to high energy by synchroton (not shown) is guided to the particle beam irradiation unit 2. The charged particle beam guided to the particle beam irradiation unit 2 is adjusted to a desired dose distribution and then irradiated to the affected part of the patient lying on the treatment bed 21.

Next, the refrigerator compressor 7 will be described in detail with reference to FIGS. 1 to 3. Among these, FIG. 2 is an enlarged view of the refrigerator compressor 7 shown in FIG. As shown in FIGS. 1 to 3, the compressor 7 for a refrigerator is attached to the rotating frame 3 so as to be able to rotate around a rotation axis R ₂ parallel to the first rotation axis R ₁ of the rotating frame 3. ing. Specifically, the refrigerator compressor 7 is attached to the rotating frame 3 via a pair of annular guide rails 5 fixed to the rotating frame 3. The pair of guide rails 5 has a groove 5a having a concave cross section on the inner peripheral surface thereof, and the compressor 7 for the refrigerator has a plurality of, for example, a plurality of, for example, moving along the groove 5a of each guide rail 5 Four wheels 13 are attached, and therefore the refrigerator compressor 7 has a total of eight wheels 13. As shown in FIG. 2, among the four wheels 13 that move along the groove 5 a of each guide rail 5, for example, one wheel 13 is connected to a compressor drive unit 8 that rotationally drives the wheel 13. Thus, the compressor 7 for the refrigerator can rotate around the rotation axis R ₂ parallel to the first rotation axis R ₁ of the rotating frame 3 so as to keep the posture constant.

  The compressor drive unit 8 and the support rolls 11a and 11b of the rotary frame support drive device 25 described above are controlled by a control device 17 disposed on the building 12 in the vicinity of the rotary frame 3, respectively. The control device 17 controls the support rolls 11a and 11b so that the rotating frame 3 rotates at the first angular velocity, and the compressor 7 for the refrigerator has the same magnitude as the first angular velocity with respect to the rotating frame 3. The compressor drive unit 8 is controlled to rotate at a second angular velocity whose direction is opposite. For this reason, the attitude | position of the compressor 7 for refrigerators can always be kept constant, while the rotary frame 3 rotates.

Incidentally, as shown in FIG. 1, the outer edge and the distance between the first rotation axis R ₁ of the rotating frame 3 has a L _1. A distance between the first rotation axis R ₁ and the rotation axis R ₂ is denoted by M ₁ .
As shown in FIG. 2, the compressor 7 for the refrigerator is attached to the rotating frame 3 so that the center of gravity C is located on a line R ₃ that extends vertically downward from the rotation axis R ₂ of the compressor 7 for the refrigerator. It has been. Thereby, the attitude | position of the compressor 7 for refrigerators can be kept more stable.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the control device 17 controls the rotary frame support drive device 25 so as to irradiate the patient on the treatment bed 21 with a charged particle beam at a desired angle. That is, the support rolls 11a and 11b of the rotating frame support driving device 25 rotate and drive the rotating rings 10a and 10b provided at both ends of the rotating frame 3, whereby the rotating frame 3 rotates. As a result, the particle beam irradiation unit 2 attached to the rotating frame 3 can have a desired angle with respect to the patient. At this time, the angular velocity (first angular velocity) of the rotating frame 3 is, for example, 360 degrees / minute.

During this time, the pair of annular guide rails 5 fixed to the rotating frame 3 also revolves around the first rotation axis R ₁ of the rotating frame 3 in synchronization with the rotating frame 3. On the other hand, the control device 17 rotates the compressor 7 for the refrigerator at an angular velocity (second angular velocity) that is the same as the first angular velocity and opposite in direction to the rotating frame 3, that is, −360 degrees / minute. The compressor drive unit 8 is controlled to do so. That is, the compressor driving unit 8 rotationally drives the wheel 13 attached to the compressor 7 for the refrigerator, and thereby moves the wheel 13 along the groove 5 a of each guide rail 5. As a result, the refrigerator compressor 7 rotates at the second angular velocity with respect to the pair of annular guide rails 5 fixed to the rotating frame 3. Accordingly, since the refrigerator compressor 7 rotates at the second angular speed while the rotating frame 3 rotates at the first angular speed, the attitude of the refrigerator compressor 7 can always be kept constant.

As described above, according to the present embodiment, the refrigerator compressor 7 that supplies the compressed refrigerant to the refrigerator 19 that cools the superconducting deflection electromagnet 4 is connected to the rotating frame 3 with the first rotation axis R ₁ of the rotating frame 3. mounted for rotation by the compressor driving unit 8 around parallel rotation axis R ₂ and. When the rotating frame 3 rotates at the first angular velocity, the refrigerator compressor 7 compresses the rotating frame 3 so as to rotate at a second angular velocity that is the same in magnitude and opposite in direction to the first angular velocity. It is driven by the machine drive unit 8. Thus, the posture of the refrigerator compressor 7 can always be kept constant while the rotating frame 3 rotates.

According to this embodiment, a compressor for a refrigerator 7, the rotating frame 3 so that the center of gravity C is located on the line R ₃ extending vertically downward from the rotation axis R ₂ of the refrigerator compressor 7 It is attached. Thereby, the attitude | position of the compressor 7 for refrigerators can be kept more stable.

  In this embodiment, the control device 17 controls the compressor drive unit 8 and the support rolls 11a and 11b of the rotary frame support drive device 25. In this case, the control device 17 is placed on the building 12 in the vicinity of the rotary frame 3. Has been placed. However, the present invention is not limited to this, and the control device 17 may be provided inside the rotating frame 3.

Moreover, in this Embodiment, the compressor 7 for refrigerators showed the example attached to the rotating frame 3 via a pair of cyclic | annular guide rail 5 fixed to the rotating frame 3. In FIG. However, the present invention is not limited to this, and as shown in FIG. 4, the compressor 7 for the refrigerator is fixed to the carriage frame 9, and the carriage frame 9 is attached to the rotating frame 3 via the pair of annular guide rails 5. It may be attached. In this case, a plurality of, for example, four wheels 13 that move along the groove 5 a of each guide rail 5 are attached to the carriage frame 9, and thus the carriage frame 9 has a total of eight wheels 13. Of the four wheels 13 that move along the groove 5a of each guide rail 5, for example, one wheel 13 is connected to a compressor drive unit 8 that rotationally drives the wheel 13, thereby The carriage frame 9 can rotate around a rotation axis R ₂ parallel to the first rotation axis R ₁ of the rotation frame 3. Thereby, while the rotating frame 3 rotates, the posture of the compressor 7 for the refrigerator fixed to the carriage frame 9 can be always kept constant.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. Here, FIG. 5 is a front view showing the compressor for the refrigerator in the second embodiment of the present invention. 6A is a cross-sectional view of the compressor for the refrigerator shown in FIG. 5 as viewed from the direction AA, and FIG. 6B is a diagram showing the compressor for the refrigerator shown in FIG. It is the longitudinal cross-sectional view seen from the direction. FIG. 7 is a diagram showing a modification in which the wheel is a gear in the second embodiment of the present invention.

  In the second embodiment shown in FIGS. 5 to 7, each guide rail has a groove section having a concave cross section on its side surface, and a wheel attached to the compressor for the refrigerator moves along the groove section. The only difference is the other configuration, which is substantially the same as that of the first embodiment shown in FIGS. In the second embodiment shown in FIG. 5 to FIG. 7, the same parts as those in the first embodiment shown in FIG. 1 to FIG.

  As shown in FIGS. 5 and 6, the pair of guide rails 5 have groove portions 5 b having a concave cross section on the side surfaces, and the compressor 7 for the refrigerator is provided along the groove portions 5 b of each guide rail 5. A plurality of, for example, four wheels 13 are attached, and the compressor 7 for the refrigerator has a total of eight wheels 13. Of the four wheels 13 that move along the groove 5 b of each guide rail 5, for example, one wheel 13 is connected to a compressor drive unit 8 that rotationally drives the wheel 13. The compressor drive unit 8 is configured such that the compressor 7 for the refrigerator has the same magnitude as the first angular velocity and the opposite direction with respect to the rotary frame 3 while the rotary frame 3 rotates at the first angular velocity. It is controlled by the control device 17 so as to rotate at the angular velocity. As a result, while the rotating frame 3 rotates, the posture of the refrigerator compressor 7 can always be kept constant.

In the present embodiment, an example in which the compressor 7 for a refrigerator is attached to the rotating frame 3 via a pair of annular guide rails 5 fixed to the rotating frame 3 is shown. However, the present invention is not limited to this, and as shown by a two-dot chain line in FIG. 5, the refrigerator compressor 7 is fixed to the carriage frame 9, and the carriage frame 9 is interposed via a pair of annular guide rails 5. It may be attached to the rotating frame 3. In this case, a plurality of, for example, four wheels 13 that move along the groove 5 b of each guide rail 5 are attached to the carriage frame 9, and thus the carriage frame 9 has a total of eight wheels 13. Of the four wheels 13 that move along the groove 5b of each guide rail 5, for example, one wheel 13 is connected to a compressor drive unit 8 that rotationally drives the wheel 13, thereby The carriage frame 9 can rotate around a rotation axis R ₂ parallel to the first rotation axis R ₁ of the rotation frame 3. Thereby, while the rotating frame 3 rotates, the posture of the compressor 7 for the refrigerator fixed to the carriage frame 9 can be always kept constant.

  Further, in the present embodiment and the first embodiment described above, the wheel 13 that moves along the groove portion 5a provided on the inner peripheral surface of the guide rail 5 or the groove portion 5b provided on the side surface of the guide rail 5, The example attached to the compressor 7 for refrigerators or the bogie frame 9 was shown. In this case, as shown in FIG. 7, the wheel 13 may include a gear 13 a, and an uneven portion 5 c that engages with the gear 13 a may be formed in the groove 5 a or the groove 5 b of the guide rail 5. Thus, the gear 13a can be moved more reliably along the groove 5a or the groove 5b of the guide rail 5.

In the present embodiment and the first embodiment described above, the refrigerator compressor 7 rotates on the rotating frame 3 around the rotating shaft R ₂ parallel to the first rotating shaft R ₁ of the rotating frame 3. The compressor 7 for the refrigerator is a first compressor that has the same magnitude and the opposite direction as the first angular velocity with respect to the rotary frame 3 while the rotary frame 3 rotates at the first angular velocity. An example in which the compressor is driven by the compressor drive unit 8 to rotate at two angular speeds has been shown. However, the present invention is not limited to this, and when the gravity acting on the compressor 7 for the refrigerator is sufficiently larger than the frictional force that the compressor 7 receives from the guide rail 5 via the wheels 13, the compressor drive unit 8 may drive the wheels 13 of the refrigerator compressor 7 so that the compressor 7 is kept in a constant posture only immediately after the rotation frame 3 starts rotating and immediately after the rotation. In this case, during the rotation of the rotating frame 3, the compressor driving unit 8 supports the wheel 13 so that the wheel 13 of the compressor 7 for the refrigerator is freely rotated with respect to the guide rail 5. When the wheel 13 rotates freely with respect to the guide rail 5, the compressor 7 for the refrigerator can keep its posture constant by gravity during the rotation of the rotating frame 3. In this way, the posture of the refrigerator compressor 7 can always be kept constant with a smaller driving force.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. Here, Fig.8 (a) is a front view which shows the compressor for refrigerators in the 3rd Embodiment of this invention, FIG.8 (b) is refrigeration in the 3rd Embodiment of this invention. It is a side view which shows the compressor for machines.

  In the third embodiment shown in FIG. 8, a compressor for a refrigerator is fixed to a rotary drive body that rotates in an annular guide rail, and the compressor is driven between the annular guide rail and the rotary drive body. The only difference is that a drive wheel driven by the part is interposed, and the other configuration is substantially the same as that of the first embodiment shown in FIGS. In the third embodiment shown in FIG. 8, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 8A, the refrigerator compressor 7 is fixed by a support mechanism 24 inside a pair of rotary driving bodies 23 that rotate in the pair of annular guide rails 5. The rotary drive body 23 includes an inner peripheral portion 23 a that supports the compressor 7 for the refrigerator, and an outer peripheral portion 23 b that faces the annular guide rail 5. As shown in FIGS. 8A and 8B, drive wheels 14 that are rotatably supported by the guide rails 5 are interposed between the rotary drive bodies 23 and the guide rails 5. The driving wheel 14 is driven by the compressor driving unit 8. In addition, support wheels 15 that are rotatably supported by the guide rails 5 are also interposed between the rotary driving bodies 23 and the guide rails 5. The support wheel 15 supports the rotation drive body 23 and assists the rotation drive body 23 in rotating.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the control device 17 controls the rotary frame support drive device 25 so as to irradiate the patient on the treatment bed 21 with a charged particle beam at a desired angle. The operation of the rotary frame support drive device 25 in this case is substantially the same as that of the first embodiment shown in FIGS.

  During this time, the control device 17 rotates the compressor 7 for the refrigerator at an angular velocity (second angular velocity) that is the same as the first angular velocity and opposite in direction with respect to the rotating frame 3, that is, −360 degrees / minute. The compressor drive unit 8 is controlled to do so. That is, the compressor drive unit 8 rotationally drives the drive wheels 14 provided on each guide rail 5, whereby the rotary drive body 23 provided in each guide rail 5 rotates (autorotates). As a result, the compressor 7 for the refrigerator fixed to the rotary driving body 23 rotates at the second angular velocity with respect to the pair of annular guide rails 5 fixed to the rotating frame 3. Accordingly, since the refrigerator compressor 7 rotates at the second angular speed while the rotating frame 3 rotates at the first angular speed, the attitude of the refrigerator compressor 7 can always be kept constant.

  As described above, according to the present embodiment, the compressor 7 for the refrigerator is fixed to the pair of rotation driving bodies 23 that rotate in the pair of annular guide rails 5 by the support mechanism 24. When the rotary frame 3 rotates at the first angular velocity, the rotary driving body 23 is driven by a compressor so that the rotary frame 3 rotates at a second angular velocity that is the same in magnitude and opposite in direction to the first angular velocity. Driven by the unit 8. Thereby, while the rotating frame 3 rotates, the posture of the refrigerator compressor 7 fixed to the rotary driving body 23 can always be kept constant.

  In the present embodiment, the example in which the compressor 7 for the refrigerator is fixed inside the pair of rotary driving bodies 23 that rotate in the pair of annular guide rails 5 is shown. However, the present invention is not limited to this, and as shown by a two-dot chain line in FIG. 8B, the refrigerator compressor 7 is fixed to the carriage frame 9 and the carriage frame 9 is fixed to the pair of annular guide rails 5. You may fix to the inner side of a pair of rotation drive body 23 which rotates inside.

  Further, in the present embodiment, a drive wheel 14 that rotationally drives the rotary drive body 23 and a support wheel 15 that supports the rotary drive body 23 are interposed between each rotary drive body 23 and the guide rail 5. An example is shown. However, the present invention is not limited to this, and the support wheel 15 may be replaced with the drive wheel 14. As a result, it is possible to increase the force for rotationally driving the rotary drive body 23. Further, as indicated by a two-dot chain line in FIG. 8B, a plurality of drive wheels 14 or support wheels 15 may be provided between each rotary drive body 23 and the guide rail 5.

  In the present embodiment, as in the case of the first or second embodiment described above, the drive wheel 14 and the support wheel 15 are formed of gears (not shown), and the outer peripheral portion 23b of the rotary drive body 23. In addition, an uneven portion (not shown) that engages with the gear may be formed. Thereby, the rotation drive body 23 can be rotated more reliably.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. Here, FIG. 9 is a side view showing a compressor for a refrigerator in the fourth embodiment of the present invention.

  In the fourth embodiment shown in FIG. 9, a plurality of wheels moving along the groove portion of each guide rail below the compressor for the refrigerator, and an inertial force according to the acceleration acting on the compressor for the refrigerator. And an inertial mass body for generating In the fourth embodiment shown in FIG. 9, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 9, the compressor 7 for a refrigerator is attached to the rotating frame 3 so as to be rotatable around a second rotating axis R ₂ ′ parallel to the rotating axis R ₁ of the rotating frame 3. . Specifically, a pair of annular guide rails 5 are attached to the rotating frame 3, and the compressor 7 for the refrigerator is rotatably attached within the pair of annular guide rails 5. This pair of guide rails 5 has a groove portion 5a having a concave cross section on the inner peripheral surface thereof, and a plurality of guide rails 5 move along the groove portions 5a of each guide rail 5 below the compressor 7 for the refrigerator. For example, two wheels 13 are attached. Accordingly, the refrigerator compressor 7 has a total of four wheels 13.

  A pair of support plates 31 is fixed to the bottom surface of the compressor 7 for the refrigerator, and an inertial force is applied to the pair of support plates 31 in the direction opposite to the acceleration according to the acceleration acting on the compressor 7 for the refrigerator. A weight (inertial mass body) 33 is attached to the pair of support plates 31 via springs 32 fixed thereto. As will be described later, when a predetermined acceleration is applied to the compressor 7 for the refrigerator, the weight 33 generates an inertial force opposite to the acceleration, thereby keeping the posture of the compressor 7 for the refrigerator stable. be able to.

Similarly to the case of the first embodiment shown in FIGS. 1 to 4, the compressor 7 for the refrigerator has a center of gravity C downward from the second rotation axis R ₂ ′ of the compressor 7 for the refrigerator. It is attached to the rotating frame 3 so as to be located on the line R ₃ extending (see FIG. 9). Thereby, the attitude | position of the compressor 7 for refrigerators can be kept more stable.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the control device 17 controls the rotary frame support drive device 25 so as to irradiate the patient on the treatment bed 21 with a charged particle beam at a desired angle. The operation of the rotary frame support drive device 25 in this case is substantially the same as that of the first embodiment shown in FIGS.

During this time, as shown in FIG. 9, the pair of annular guide rails 5 fixed to the rotating frame 3 also revolves around the first rotation axis R ₁ of the rotating frame 3 in synchronization with the rotating frame 3. In this case, for example, as shown in FIG. 9, the guide rail 5 rotates in the direction indicated by the arrow a. By the way, as mentioned above, the compressor 7 for refrigerators is attached to the guide rail 5 via the two wheels 13 which move along the groove part 5a of the guide rail 5. In this case, the compressor 7 for the refrigerator has the second rotation axis R with respect to the guide rail 5 so as to keep the posture of the compressor 7 for the refrigerator almost constant by the gravity acting on the compressor 7 for the refrigerator. Rotate around ₂ '. During this time, the center of gravity C of the compressor 7 for the refrigerator is always located on a line R ₃ extending downward in the vertical direction from the second rotation axis R ₂ ′.

By the way, while the refrigerator compressor 7 rotates around the second rotation axis R ₂ ′ with respect to the guide rail 5, it is between the groove portion 5 a of the guide rail 5 and the wheel 13 of the refrigerator compressor 7. As shown in FIG. 9, frictional forces b ₁ and b ₂ are generated. Due to the frictional forces b ₁ and b ₂ , the acceleration b ₃ acts on the refrigerator compressor 7 so as to tilt the attitude of the refrigerator compressor 7. In this case, weight 33 mounted below the refrigerator compressor 7, in accordance with the acceleration b ₃ which acts on the compressor for a refrigerator 7, to generate the inertial force c to the acceleration b ₃ and opposite. As a result, even if the acceleration b ₃ is applied by the frictional forces b ₁ and b ₂ and the attitude of the compressor 7 for the refrigerator is tilted, the inertia force c cancels the acceleration b _3, thereby further reducing the inclination. Can be small.

As described above, according to the present embodiment, the compressor 7 for the refrigerator is moved to the guide rail 5 fixed to the rotating frame 3 via the two wheels 13 that move along the groove 5 a of the guide rail 5. It is attached. In this case, the compressor 7 for the refrigerator has the second rotation axis R with respect to the guide rail 5 so as to keep the posture of the compressor 7 for the refrigerator almost constant by the gravity acting on the compressor 7 for the refrigerator. Rotate around ₂ '. Thus, the posture of the refrigerator compressor 7 can be kept substantially constant while the rotating frame 3 rotates.

  Further, according to the present embodiment, the weight 33 that generates an inertial force according to the acceleration acting on the refrigerator compressor 7 is attached below the compressor 7 for the refrigerator. For this reason, even if the attitude | position of the compressor 7 for refrigerators is inclined by the frictional force which arises between the groove part 5a of the guide rail 5 and the wheel 13 of the compressor 7 for refrigerators, the inclination can be made smaller. it can.

  In the present embodiment, an example in which the compressor 7 for the refrigerator is attached to the rotating frame 3 via a pair of annular guide rails 5 fixed to the rotating frame 3 is shown. However, the present invention is not limited to this, and similarly to the case of the first embodiment shown in FIGS. 1 to 4, the refrigerator compressor 7 is fixed to the carriage frame 9, and the carriage frame 9 is paired with a pair of You may attach to the rotation frame 3 via the cyclic | annular guide rail 5. FIG.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIG. Here, Fig.10 (a) is a partially broken front view which shows the rotary irradiation treatment apparatus in the 5th Embodiment of this invention, FIG.10 (b) is in the 5th Embodiment of this invention. It is a side view which shows the compressor for refrigerators.

In the fifth embodiment shown in FIG. 10, a compressor 7 for a refrigerator is suspended from a rotary frame 3 around a second rotary axis R ₂ ′ parallel to the first rotary axis R ₁ of the rotary frame 3. It is attached so as to be rotatable by means 34. In the fifth embodiment shown in FIG. 10, the same parts as those in the first embodiment shown in FIGS.

As shown in FIG. 10 (a), a compressor for a refrigerator 7, the rotating frame 3, and rotatable about a first axis of rotation R ₁ second rotation axis parallel to the R _{2 'of} the rotary frame 3 Installed like so. Specifically, the compressor 7 for the refrigerator is suspended from the rotating frame 3 by the suspending means 34. As shown in FIG. 10B, the suspending means 34 is attached to the rotary frame 3 so as to be rotatable around a second rotation axis R ₂ ′ parallel to the first rotation axis R _{1 of the} rotation frame 3. The compressor 7 for the refrigerator can rotate with respect to the rotary frame 3 using the fixture 34a as the second rotation axis R ₂ ′. In the lower part of the compressor 7 for the refrigerator, as in the case of the fourth embodiment shown in FIG. 9, according to the acceleration acting on the compressor 7 for the refrigerator, the inertial force is opposite to the acceleration. Is attached.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the control device 17 controls the rotary frame support drive device 25 so as to irradiate the patient on the treatment bed 21 with a charged particle beam at a desired angle. The operation of the rotary frame support drive device 25 in this case is substantially the same as that of the first embodiment shown in FIGS.

During this time, as shown in FIG. 10, the compressor 7 for the refrigerator is placed on the rotary frame 3 so as to keep the posture of the compressor 7 for the refrigerator almost constant by gravity acting on the compressor 7 for the refrigerator. And rotate around the second rotation axis R ₂ ′. During this time, the center of gravity C of the compressor 7 for the refrigerator is always located on a line R ₃ extending downward in the vertical direction from the second rotation axis R ₂ ′.

By the way, while the refrigerator compressor 7 rotates around the second rotation axis R ₂ ′ with respect to the rotating frame 3, a frictional force is generated between the fixture 34 a and the rotating frame 3. Due to this frictional force, acceleration acts on the refrigerator compressor 7 so as to tilt the posture of the refrigerator compressor 7. At this time, the weight 33 attached below the refrigerator compressor 7 generates an inertial force in the direction opposite to the acceleration according to the acceleration acting on the compressor 7 for the refrigerator. As a result, even if acceleration is applied by the frictional force and the attitude of the compressor 7 for the refrigerator is inclined, the inclination can be further reduced by the inertial force canceling out the acceleration.

As described above, according to the present embodiment, the compressor 7 for the refrigerator is suspended from the rotating frame 3 around the second rotating shaft R ₂ ′ parallel to the first rotating shaft R ₁ of the rotating frame 3. 34 so as to be rotatable. In this case, the compressor 7 for the refrigerator has the second rotational axis R with respect to the rotary frame 3 so as to keep the posture of the compressor 7 for the refrigerator almost constant by gravity acting on the compressor 7 for the refrigerator. Rotate around ₂ '. Thus, the posture of the refrigerator compressor 7 can be kept substantially constant while the rotating frame 3 rotates.

  Further, according to the present embodiment, the weight 33 that generates an inertial force according to the acceleration acting on the refrigerator compressor 7 is attached below the compressor 7 for the refrigerator. For this reason, even if the attitude | position of the compressor 7 for refrigerators is inclined by the frictional force which arises between the fixture 34a and the rotation frame 3, the inclination can be made smaller.

  In the present embodiment, the example in which the fixture 34a of the suspending means 34 is provided above the compressor 7 for the refrigerator is shown. However, the present invention is not limited to this, and the attachment 34a may be provided adjacent to the upper surface of the refrigerator compressor 7 as shown by a two-dot chain line in FIG. Moreover, you may provide the fixture 34a so that the compressor 7 for refrigerators may be penetrated.

DESCRIPTION OF SYMBOLS 1 Rotation irradiation treatment apparatus 2 Particle beam irradiation part 3 Rotating frame 4 Superconducting deflection electromagnet 5 Guide rail 5a Groove part 5b of guide rail inner peripheral surface Groove part 5c of guide rail side surface 6 Flexible hose 7 Compressor 8 for compressor Machine drive unit 9 Bogie frame 10a Rotating ring 10b on one side Rotating ring 11a on the other side Support roll 11b on the other side 12 Support roll 12 on the other side 12 Building 13 Wheel 13a Gear 14 Drive wheel 15 Support wheel 17 Controller 18 Vacuum duct 18a Vacuum Duct straight portion 18b Vacuum duct curved portion 19 Refrigerator 20 Treatment room 21 Treatment bed 23 Rotating drive 23a Rotating drive inner peripheral portion 23b Rotating drive outer peripheral portion 24 Support mechanism 25 Rotating frame support driving device 26 Quadrupole Electromagnet 30 Beam transport device 31 Support plate 32 Spring 33 Weight 34 Suspension It means 34a fixture

Claims (13)

A rotating frame provided rotatably,
A particle beam irradiation unit that is attached to a rotating frame and irradiates a charged particle beam;
A beam transport device that is attached to a rotating frame and guides a charged particle beam to a particle beam irradiation unit;
A rotating frame supporting and driving device for rotatably supporting the rotating frame and rotating the rotating frame around the first rotation axis;
A control device for controlling the beam transport device and the rotating frame support drive device,
The beam transport device includes a vacuum duct having a straight portion and a curved portion for guiding a charged particle beam to the particle beam irradiation unit, and a superconducting deflection electromagnet provided on an outer periphery of the curved portion of the vacuum duct, and the superconducting deflection A refrigerator is provided for cooling the electromagnet, and a compressor for a refrigerator for supplying a compressed refrigerant to the refrigerator is provided,
The compressor for a refrigerator is attached to the rotating frame so as to be rotatable around a second rotating shaft parallel to the first rotating shaft of the rotating frame so as to keep the posture of the compressor for the refrigerator constant. A rotary irradiation treatment apparatus characterized by the above.   The inertia mass body that generates an inertial force in a direction opposite to the acceleration according to an acceleration acting on the compressor for the refrigerator is attached below the compressor for the refrigerator. 2. The rotary irradiation treatment apparatus according to 1. The compressor for a refrigerator is attached to a rotating frame so as to be able to rotate by a compressor driving unit with the second rotating shaft as a rotating shaft,
The control device controls the rotary frame support drive device so that the rotary frame rotates at a first angular velocity, and the compressor for the refrigerator has the same magnitude as the first angular velocity with respect to the rotary frame. The rotary irradiation treatment apparatus according to claim 1, wherein the compressor driving unit is controlled to rotate at a second angular velocity having a reverse direction.   The rotary irradiation treatment apparatus according to claim 3, wherein the compressor for the refrigerator is attached to the rotating frame via an annular guide rail fixed to the rotating frame. The compressor for the refrigerator is fixed to a carriage frame;
The rotary irradiation treatment apparatus according to claim 3, wherein the cart frame is attached to the rotating frame via an annular guide rail fixed to the rotating frame. The guide rail has a groove having a concave cross section on the inner peripheral surface thereof.
The rotary irradiation treatment apparatus according to claim 4, wherein a wheel that moves along the groove is attached to the compressor for the refrigerator, and the wheel is driven by the compressor driving unit. The guide rail has a groove having a concave cross section on its side surface,
The rotary irradiation treatment apparatus according to claim 4, wherein a wheel that moves along the groove is attached to the compressor for the refrigerator, and the wheel is driven by the compressor driving unit. The guide rail has a groove having a concave cross section on the inner peripheral surface thereof.
6. The rotary irradiation treatment apparatus according to claim 5, wherein a wheel that moves along the groove is attached to the carriage frame, and the wheel is driven by the compressor driving unit. The guide rail has a groove having a concave cross section on its side surface,
6. The rotary irradiation treatment apparatus according to claim 5, wherein a wheel that moves along the groove is attached to the carriage frame, and the wheel is driven by the compressor driving unit. The wheels are gears;
The rotary irradiation treatment apparatus according to claim 6, wherein an uneven portion that engages with the gear is formed in a groove portion of the guide rail. The compressor for the refrigerator is fixed to a rotary driving body that rotates in the annular guide rail,
The rotary irradiation treatment apparatus according to claim 4, wherein a drive wheel driven by the compressor drive unit is interposed between the annular guide rail and the rotary drive body. The cart frame is fixed to a rotary drive that rotates in the annular guide rail,
The rotary irradiation treatment apparatus according to claim 5, wherein a driving wheel driven by the compressor driving unit is interposed between the annular guide rail and the rotary driving body.   The rotary irradiation treatment apparatus according to claim 3, wherein the center of gravity of the compressor for the refrigerator is on a line extending downward in the vertical direction from the rotation axis of the compressor for the refrigerator.

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