JP2023148799A - X-ray fluoroscopic device - Google Patents

Abstract

To provide an X-ray fluoroscopic device capable of preventing dust from entering a housing of an X-ray generation part, while having a structure causing rotation with respect to a support part of the X-ray generation part.SOLUTION: When a first opening of an X-ray generation unit is moved to a higher position than a second housing of a support arm unit, along with rotation of the X-ray generation unit, a shield member 80 covers an area exposed above the second housing, of the first opening, and when the first opening of the X-ray generation unit is moved to a lower position than the second housing, the shield member 80 covers an area exposed above a first housing of, a second opening.SELECTED DRAWING: Figure 5

Description

The present invention relates to an X-ray fluoroscopic imaging device.

An X-ray fluoroscopic imaging apparatus includes a table on which a subject is placed, an X-ray tube that irradiates the subject with X-rays, and an X-ray detector provided within a support frame of the table. The table, the X-ray tube, and the X-ray detector are drivably supported by a support portion having a plurality of movable axes. A plurality of movable shafts included in the support section are driven by a drive section. By driving the plurality of movable axes by the drive unit, the table and the X-ray tube can be moved together or independently, and the X-ray irradiation position can be moved to an arbitrary position. X-rays irradiated from the X-ray tube to the subject are transmitted through the subject and detected by an X-ray detector. An X-ray image is generated from the X-ray signal output by the X-ray detector and displayed.

Patent Document 1 discloses an X-ray imaging device that can rotate an X-ray generating section around the Z-axis (longitudinal direction of the table). Patent Document 1 discloses a structure in which the X-ray generating section is rotatable about the longitudinal direction of the table, in which a rotary drive section such as a motor is provided at the connection between the X-ray generating section and the support section, and the X-ray generating section is rotated around the longitudinal direction of the table. A structure is disclosed in which the support part is rotated relative to the tip of the support part.

Japanese Patent Application Publication No. 2015-47392

Generally, two power cables each having a diameter of 20 mm or more for supplying high voltage are connected to the X-ray generating section, and a plurality of control wirings are also connected to the X-ray generating section. These cables and the like are routed along the support section and connected to the X-ray generation section from the tip of the support section. The X-ray generator includes a housing that covers an X-ray tube and the like, a power cable, and the like. The support section is provided with a housing that covers structures such as columns and power cables. Openings are provided in the casing of the X-ray generating section and the casing of the support section so as to face each other. Inside the opening, a structure at the tip of the support section that supports the X-ray generation section, two power cables, a plurality of wiring lines, etc. are disposed throughout the space. Further, since a high voltage is applied to the power cable, it is undesirable to bend the power cable or apply force to it by contacting something.

In the X-ray generating section and supporting section having such a structure, when the X-ray generating section is rotated around the longitudinal direction of the table, the housing of the X-ray generating section also rotates with respect to the housing of the supporting section. , the positions of the opposing openings are shifted. The direction and amount of positional deviation depend on the rotational direction and rotational angle of the X-ray generating section. For example, it is desired to rotate the X-ray generating section within a range of ±15 degrees around the longitudinal direction of the table. When the X-ray generating unit is rotated within a range of ±15 degrees, the opening facing the housing of the supporting part of the housing of the X-ray generating part will move in a direction higher than the housing of the supporting part, or will move lower than the housing of the supporting part. move in a certain direction. Furthermore, since the movement of the X-ray generation section is a rotational movement, the movement locus of the opening of the housing of the X-ray generation section draws an arc.

If the opening of the housing of the X-ray generator is shifted from the opening of the housing of the support part, the opening will be exposed and there is a risk that dust or the like may enter the housing through the opening.

If the size of the aperture is narrowed, the area of the aperture that is exposed as the X-ray generator rotates can be reduced, but the power cable that passes through the aperture will be pressed against the edge of the aperture, and force will be applied to the power cable. The rotational angle of the X-ray generating part is narrowed because the X-ray generating part can rotate.
Further, Patent Document 1 does not describe anything about the positional deviation between the opening of the housing of the X-ray generating unit and the opening of the housing of the support unit due to rotation of the X-ray generating unit.

SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray fluoroscopic imaging device that is equipped with a structure that allows the X-ray generating section to rotate with respect to a support section, and that can prevent dust from entering the housing of the X-ray generating section. be.

The X-ray fluoroscopic imaging apparatus of the present invention includes an X-ray generating section, a support arm that supports the X-ray generating section, one end connected to the X-ray generating section, and an upper end connected to the other end of the supporting arm, It has a column that supports the support arm and a table on which the subject is mounted. A rotation drive unit that rotates the X-ray generation unit about the longitudinal direction of the table and a shield member are arranged at the connection between the support arm and the X-ray generation unit. The X-ray generator includes a first housing having a first opening. The support arm includes a second housing having a second opening. The first opening and the second opening face each other with a predetermined gap in between at the connection portion. When the first opening of the X-ray generating section moves to a position higher than the second housing of the support arm as the X-ray generating section rotates, the shield member is moved above the second housing of the first opening. Cover areas exposed to When the first opening of the X-ray generator moves to a position lower than the second housing, the shield member covers the area of the second opening that is exposed above the first housing.

According to the present invention, it is possible to prevent dust from entering the casing of the X-ray generating section while providing a structure for rotating the X-ray generating section with respect to the support section.

FIG. 1 is a perspective view of an X-ray fluoroscopic imaging apparatus 1 according to the present embodiment. FIG. 3 is a block diagram showing a schematic configuration of an X-ray rotation drive section 300 disposed at a connecting portion between an X-ray generation section 60 and an X-ray support arm section 90 according to the present embodiment. (a-1) to (a-3) are a side view, front view, and rear view of the X-ray generating unit 60 rotated by +15 degrees around the X direction, and (b-1) to (b -3) is a side view, front view, and rear view of the X-ray generation unit 60 in a state where it is not rotated (0 degrees), and (c-1) to (c-3) are the X-ray generation unit 60 FIG. 3 is a side view, a front view, and a rear view of the device rotated by -15 degrees about the X direction. FIG. 7 is a cutaway perspective view showing the X-ray generation section 60 of the embodiment removed from the X-ray support arm section 90. FIG. 7 is a perspective view of a shield member 80 seen from the X-ray generating section 60 side of the embodiment. FIG. 8 is a perspective view of the shield member 80 seen from the X-ray support arm 90 side of the embodiment. FIG. 7 is a perspective view of the shield member 80 disposed in the gap between the first opening 65 of the first housing 61 and the second opening 95 of the second housing 91 when the rotation angle of the embodiment is 0 degrees. The perspective view of the state where the shield member 80 is arranged in the gap between the first opening 65 of the first housing 61 and the second opening 95 of the second housing 91 when the rotation angle of the embodiment is +15 degrees. FIG. 7 is a perspective view of the shield member 80 disposed in the gap between the first opening 65 of the first casing 61 and the second opening 95 of the second casing 91 when the rotation angle of the embodiment is -15 degrees. The perspective view of the X-ray generation part 60, the shield member 80, the guide rail 85, and the spring 86 when the rotation angle of embodiment is 0 degrees. The perspective view of the X-ray generation part 60, the shield member 80, the guide rail 85, and the spring 86 when the rotation angle of embodiment is +15 degrees. A perspective view of the X-ray generator 60, the shield member 80, the guide rail 85, and the spring 86 when the rotation angle of the embodiment is -15 degrees. FIG. 6 is a rear view of the X-ray generating section 60 and the shield member 80 when the rotation angle of the embodiment is +15 degrees. FIG. 7 is a rear view of the X-ray generating section 60 and the shield member 80 when the rotation angle is -15 degrees in the embodiment. FIG. 6 is a perspective view of an X-ray generating section 60 using a magnet 151 as an engaging member of the embodiment. (a) to (c) are perspective views of the lower surface side of the X-ray generation section 60 and the X-ray support arm section 90 of the embodiment. A cross-sectional view of a second shield member 160 of the embodiment.

Hereinafter, one embodiment of the present invention will be described using the drawings.

<Overall configuration>
First, the overall configuration of the X-ray fluoroscopic imaging apparatus of this embodiment will be described using FIG. 1. FIG. 1 is a perspective view of an X-ray fluoroscopic imaging apparatus 1 of this embodiment.

The X-ray fluoroscopic imaging apparatus 1 of the present invention includes an X-ray generating section 60, an X-ray supporting arm section 90 whose one end is connected to the X-ray generating section 60 and supporting the X-ray generating section 60, and an X-ray supporting arm section. The upper end of the X-ray support arm 90 is connected to the other end thereof, and the X-ray supporting arm 90 is connected to the support 50 , the table 41 on which the subject is mounted, and the stand 10 . The stand portion 10 supports the connecting portion 20. A table 41 and a support column 50 are mounted on the connecting portion 20. In FIG. 1, the Z direction is the vertical direction, and the X and Y directions are the longitudinal and lateral directions of the table 41, respectively.

The connecting portion 20 is equipped with a rotation mechanism 21 that rotates the support 50 with respect to the connecting portion 20 around the Y direction. Thereby, the X-ray generating section 60 can be tilted with respect to the table 41 as a rotation axis in the Y direction.

The stand section 10 is equipped with an elevating mechanism 11 that raises and lowers the connecting section 20 in the Z direction, and a rotation mechanism (not shown) that rotates the connecting section 20 around the Y direction. With these mechanisms, the table 41 and the X-ray generating section 60 mounted on the connecting section 20 can rotate about the axis in the Y direction and/or move up and down in the Z direction while maintaining their positional relationship.

The connecting portion 20 is also equipped with a column moving mechanism 51 that moves the column 50 in the Y direction. When the column moving mechanism 51 moves the column 50 in the Y direction, the X-ray generating section 60 moves in the lateral direction (Y direction) of the table 41. The connecting portion 20 is also equipped with a mechanism (not shown) that moves the support column 50 in the X direction.

Furthermore, an X-ray rotation drive section 300 (FIG. 2 ) are located. The configuration of the X-ray rotation drive section 300 will be explained in detail later.

The table 41 includes a support frame 30 mounted on the connecting portion 20 and a top plate 40 supported by the support frame 30. Further, an X-ray detector 70 is disposed within the support frame 30 at a position facing the X-ray generator 60 to detect X-rays emitted from the X-ray generator 60 and transmitted through the subject. An X-ray detector has, for example, a configuration in which a plurality of detection elements that detect X-rays are arranged in a two-dimensional array, and outputs an X-ray signal according to the incident amount of X-rays that have passed through a subject.

Note that in this embodiment, the X-ray generating section 60 is moved in the Y direction with respect to the table 41 by moving the support column 50 in the Y direction on the connecting section 20, but this embodiment does not have this structure. It is not limited to. The structure may be such that the top plate 40 is moved in the Y direction relative to the support frame 30, or the table 41 is moved in the Y direction relative to the connecting portion 20.

Furthermore, a high voltage generation section 112 that supplies power is connected to the X-ray generation section 60. The X-ray detector 70 is connected to an X-ray image processing unit 114 that performs image processing on the X-ray signals output by the X-ray detector 70. For example, the X-ray image processing unit 114 performs gamma conversion, gradation conversion processing, image enlargement/reduction, etc. as image processing. The X-ray image processing unit 114 is connected to a display device 115 that displays an X-ray image and an external storage unit 116 that stores the X-ray image. The operation unit 118 accepts instructions from the user. The control unit 117 controls each component of the X-ray fluoroscopic imaging apparatus according to instructions received by the operation unit 118.

The X-ray generator 60 has an X-ray tube that receives power from the high-voltage generator 112 and generates X-rays. The X-ray generating section 60 is also equipped with an X-ray filter that selectively transmits X-rays of a specific energy, and an X-ray diaphragm 200 that sets the X-ray irradiation area for the subject.

<X-ray generation section 60 and X-ray support arm section 90>
The structure and operation of the X-ray generating section 60 and the X-ray supporting arm section 90 will be described in detail below with reference to FIGS. 2, 3, 4, and the like. FIG. 2 is a diagram showing a schematic configuration of the X-ray rotation drive section 300 disposed at the connection part between the X-ray generation section 60 and the X-ray support arm section 90, and FIG. ) are a side view, a front view, and a rear view of the X-ray generating unit 60 in a state where it is not rotated around the X direction (0 degrees), and FIGS. 3(a-1) to (a-3) are 3(c-1) to (c-3) are a side view, a front view, and a rear view of the X-ray generator 60 rotated by +15 degrees around the X direction, and FIGS. 3(c-1) to (c-3) show the X-ray generator 60 They are a side view, a front view, and a rear view of the device rotated by −15 degrees about the X direction. FIG. 4 is a cutaway perspective view of the X-ray generator 60 removed from the X-ray support arm 90.

As shown in FIG. 2, the connection between the X-ray support arm 90 and the X-ray generation section 60 includes an A drive unit 300 is arranged. The X-ray rotation drive section 300 includes a mechanism section that rotatably supports the X-ray tube 62 of the X-ray generation section 60 and a drive source at the tip of the chassis 93 of the X-ray support arm section 90 . The mechanism section includes a rack 301 installed along the circumference of the X-ray tube 62, and a pinion gear 302 disposed at the tip of the chassis 93. Pinion gear 302 meshes with rack 301. On the chassis 93, a motor 303 serving as a driving source, a reduction gear 304, a pulley 305, and a belt 306 are mounted. The rotational force of the motor 303 is transmitted to the reducer 304 via the pulley 305 and belt 306, and the reducer 304 rotates the pinion gear 302. Thereby, the pinion gear 302 can displace the rack provided along the circumference of the X-ray tube and rotate the X-ray tube 62 in the direction of the arrow in FIG. 2.

As shown in FIG. 3, the X-ray generator 60 includes a first housing 61 having a first opening 65. As shown in FIG. As shown in FIG. 4, inside the first housing 61 are an X-ray tube 62, a pair of power cables 63 that supply the high voltage from the high voltage generator 112 to the X-ray tube 62, and A number of control signal lines to the sensors and the like are arranged.

On the other hand, the X-ray support arm 90 includes a second housing 91 having a second opening 95 as shown in FIG. Inside the second housing 91, a chassis 93, a pinion gear 302, a motor 303, a speed reducer, etc., which are elements of the X-ray rotation drive unit 300 on the chassis 93, are arranged.

The first opening 65 and the second opening 95 are connected to the connection part 310 when the X-ray rotation drive part 300 is not rotating the X-ray generation part 60 (FIG. 3(b-1) to (b-3)). are opposed to each other with a predetermined gap in between.

Further, the pair of power cables 63 of the X-ray generating section 60 are pulled out from the first opening 65 of the first housing 61 and into the second housing 91 of the X-ray support arm section 90 from the second opening 95. It is routed within the second casing 91 and within the pillar 50, and is connected to the high voltage generating section 112.

In the X-ray generation section 60 and the X-ray support arm section 90 having such configurations, the X-ray rotation drive section 300 rotates the X-ray generation section 60 within a predetermined angular range around a rotation axis parallel to the X direction. , the direction of irradiation of the X-rays can be tilted along the lateral direction (in the Y direction) of the table 41. In this embodiment, as shown in FIG. 3, the X-ray rotation drive unit 300 and the openings of the first aperture 65 and the second aperture 95 are configured so that the rotation can be performed within a range of -15 degrees to +15 degrees. The size etc. are designed.

Further, when the X-ray rotation drive unit 300 rotates the X-ray generation unit 60, the first housing 61 of the X-ray generation unit 60 rotates to the second housing 91 of the X-ray support arm 90, as shown in FIG. Rotate against. Since the movement locus of the first opening 65 of the first housing 61 of the X-ray generator 60 draws an arc, the first housing 61 is formed in an arc shape as shown in FIG. 3 . Further, the second opening 95 of the second housing 91 of the X-ray support arm 90 is formed in a concave shape along the arc shape of the first housing 61. Thereby, the first housing 61 of the X-ray generating section 60 is configured not to interfere with the second housing 91 of the X-ray support arm section 90 as it rotates.

When the X-ray rotation drive section 300 rotates the X-ray generation section 60, the first housing 61 of the X-ray generation section 60 is moved relative to the second housing 91 of the X-ray support arm section 90, as shown in FIG. Because of this, the positions of the first opening 65 and the second opening 95 that face each other are also shifted. The direction and amount of positional deviation depend on the rotational direction and rotational angle of the X-ray generating section 60.

When the X-ray generating section 60 is rotated by +15 degrees, the first opening 65 of the first housing 61 of the X-ray generating section 60 is exposed to the X-rays as shown in FIGS. The supporting arm portion 90 moves in a direction higher than the second casing 91 . As a result, a portion of the first opening 65 of the first housing 61 of the X-ray generating unit 60 is located above the upper surface of the second housing 91, so that a portion of the first opening 65 is exposed. There is a possibility that dust or the like may enter the first housing 61 through the exposed part of the first opening 65.

On the other hand, when the X-ray generating section 60 is rotated by -15 degrees, the first opening 65 of the first housing 61 of the X-ray generating section 60 is , the X-ray support arm 90 moves in a direction lower than the second housing 91. As a result, a portion of the second opening 95 of the second housing 91 of the X-ray support arm 90 is located above the top surface of the first housing 61, so that a portion of the second opening 95 is exposed. There is a possibility that dust or the like may enter the second housing 91 through the exposed part of the second opening 95.

Therefore, in this embodiment, a shield member 80 is disposed at the connection portion between the X-ray support arm section 90 and the X-ray generation section 60. When the first opening 65 of the X-ray generator 60 moves to a higher position than the second housing 91 of the X-ray support arm 90 as the rotation drive unit 300 rotates the X-ray generator 60, the shield The member 80 covers the area of the first opening 65 that is exposed above the second housing 91 . Further, when the first opening 65 of the X-ray generating section 60 moves to a position lower than the second housing 91, the shielding member 80 has an area exposed above the first housing 61 of the second opening 95. cover. The shield member 80 may have any configuration as long as it can cover the above region. In this embodiment, the shield member 80 has the following configuration as an example.

That is, the shield member 80 has a plate shape shown in FIGS. 5 and 6, and is arranged in the gap between the first opening 65 of the first housing 61 and the second opening 95 of the second housing 91. (See Figures 7 to 9). Note that FIG. 5 is a perspective view of the shield member 80 seen from the X-ray generating section 60 side. FIG. 6 is a perspective view of the shield member 80 seen from the X-ray support arm 90 side. 7 to 9 are perspective views of the shield member 80 disposed in the gap between the first opening 65 of the first housing 61 and the second opening 95 of the second housing 91. A part of the first casing 61 is cut out so that it can be seen.

When the first opening 65 of the X-ray generating section 60 moves to a position higher than the second housing 91 of the X-ray supporting arm section 90 (in the positive direction), (at the time of rotation), as shown in FIG. 8, it moves upward as the first housing 61 moves and covers (closes) the area of the first opening 65 that is exposed above the second housing 91. .

On the other hand, when the first opening 65 of the X-ray generating section 60 moves to a position lower than the second housing 91 (during rotation in the negative direction), the shield member 80 moves to a position lower than the second housing 91, as shown in FIG. It does not move along with the movement of the second opening 95 and covers (closes) the area of the second opening 95 that is exposed above the first casing 61 .

That is, the shield member 80 has different surfaces on both sides when the first opening 65 is located at a higher position than the second housing 91 and when the second opening 95 is located at a higher position than the first housing 61. The structure is such that the first opening 65 and the second opening 95, which are exposed respectively, are closed.

<Detailed structure of shield member 80>
The detailed structure of the shield member 80 will be explained.

The shield member 80 includes a band-shaped portion 81 and leg portions 82a and 82b that support both sides of the band-shaped portion 81. As the X-ray generation unit 60 rotates, the band-shaped portion 81 is formed in a region exposed above the second casing 91 of the first opening 65 and above the first casing 61 of the second opening 95. It has a shape that allows it to cover exposed areas. The band portion 81 and the leg portions 82a, 82b are both plate-shaped and integrally formed.

As shown in FIG. 3, both the first casing 61 and the second casing 91 have upper surfaces curved in the X direction, and the curved shapes of the two almost match, forming a smooth continuous upper surface. . Therefore, the upper edge of the first opening 65 and the upper edge of the second opening 95 also have a matching curved shape. The upper edge of the shield member 80 is formed into a curved shape that matches the upper edge of the first opening 65 and the upper edge of the second opening 95. Further, the width of the strip portion 81 of the shield member 80 in the main plane is equal to or greater than the width of the first opening 65 and the second opening 95, and the width of the strip portion 81 of the shield member 80 is equal to or greater than the width of the first opening 65 and the second opening 95. Not designed to size. Thereby, the area at a predetermined height above the first opening 65 and the second opening 95 can be closed to the full width of the opening.

As described above, the end where the first opening 65 of the first housing 61 of the X-ray generating unit 60 is located and the second opening 95 of the second housing 91 of the X-ray support arm 90 are located. Both ends have an arc shape along the locus of rotation by the X-ray rotation drive section 300 of the X-ray generation section 60. The main plane of the shield member 80 has a curved shape along the arc shapes of the first housing 61 and the second housing 91. Thereby, the shield member 80 can be positioned along the curved opening surfaces of the first opening 65 and the second opening 95, so that the upper part of the first opening 65 and the second opening 95 can be tightly closed. .

When the first opening 65 of the X-ray generating section 60 moves to a position higher than the second housing 91 of the X-ray supporting arm section 90 as the X-ray generating section 60 rotates, the shielding member 80 has a first A moving mechanism is provided that moves the housing 61 upward as the housing 61 moves.

Specifically, the moving mechanisms are engagement members 83a and 83b provided on the legs 82a and 82b, and are provided on the surface on the X-ray generation section 60 side as shown in FIG.

Here, the engaging members 83a and 83b are protrusions that engage with a part of the mechanism 64 of the X-ray generating section 60. The engaging members 83a and 83b are configured to close a portion of the X-ray generating section 60 when the first opening 65 of the X-ray generating section 60 moves to a position higher than the second housing 91 of the X-ray supporting arm section 90. The shield member 80 is moved together with the X-ray generating section 60 by engaging with the mechanism 64 .

The mechanism 64 that engages with the engaging members 83a and 83b is fixed inside the first openings 65 on both sides of the first housing 61, as shown in FIG. 4 and FIGS. It also serves as a dustproof cover on the side. The engaging members 83a and 83b are caught on the upper surface of the mechanism (dustproof cover) 64.

Further, as shown in FIG. 6, on the surface of the shield member 80 on the side of the X-ray support arm 90, guide protrusions 84a and 84b are provided at the lower ends of the legs 82a and 82b. A guide rail 85 is fixed to the tip of the chassis 93 of the X-ray support arm 90, as shown in FIG. The axial direction of the guide groove of the guide rail 85 is directed in the vertical direction. As shown in FIG. 4, guide protrusions 84a and 84b are engaged with the guide rail 85, which guide the vertical movement of the shield member 80 and limit the vertical movable range of the shield member 80 by providing guide grooves. limited to the specified range.

One end of a spring 86, which is an elastic member, is attached to the guide projections 84a, 84b. The other end of the spring 86 is attached to a stay 83 fixed to the chassis 93. Thereby, the spring 86 biases the shield member 80 downward.

<Operation of shield member 80>
The operation of the shield member 80 will be explained using the above-mentioned FIGS. 7 to 9, FIGS. 10 to 12, and FIGS. 13 to 14. 10 to 12 are perspective views of the X-ray generating section 60, the shield member 80, the guide rail 85, and the spring 86, and the rotation angles are 0 degrees, +15 degrees, and -15 degrees, respectively. In FIGS. 10 to 12, a portion of the first housing 61 is cut out so that the shield member 80 can be seen. 13 and 14 are rear views of the X-ray generating section 60 and the shield member 80, and the rotation angles are +15 degrees and -15 degrees.

When the X-ray generator 60 is rotated in the upward direction (positive direction), the first opening 65 of the first housing 61 moves in a direction higher than the second housing 91 of the X-ray support arm 90. do. Accordingly, the shield member 80 moves up together with the X-ray generating section 60 because the engaging members 83a and 83b are caught on the upper surface of the mechanism (dustproof cover) 64 of the X-ray generating section 60. When a part of the first opening 65 of the first housing 61 of the X-ray generating unit 60 is located above the upper surface of the second housing 91, the shield member 80 covers (closes) that area.

In this state, when the X-ray generating section 60 is rotated in the downward direction (minus direction), the first opening 65 of the first housing 61 of the X-ray generating section 60 moves in the downward direction. Since the shield member 80 is urged downward by its own weight and the spring 86, the shield member 80 also descends.

Further, when the X-ray generating section 60 is rotated in the downward direction (minus direction), the first opening 65 of the first housing 61 of the X-ray generating section 60 is opened in the second housing of the X-ray supporting arm section 90. 91. At this time, the shield member 80 is restricted from moving downward by the lower end of the guide groove of the guide rail 85 and does not descend. As a result, a part of the second opening 95 of the second housing 91 of the X-ray support arm 90 is located above the top surface of the first housing 61, so that a part of the upper part of the second opening 95 However, since the shield member 80 has not been lowered, the exposed area above the second opening 95 is covered (closed).

In this way, no matter which direction the X-ray generator 60 rotates, the shield member 80 can close the exposed opening, thereby preventing dust from entering the opening.

Further, the height (width in the vertical direction) of the strip portion 81 of the shield member 80 is designed to match the heights of the exposed first opening 65 and second opening 95. Therefore, the range of blocking the first opening 65 and the second opening 95 can be minimized, and as shown in FIGS. Even in this case, a large opening size can be ensured and the power cable 63 will not be bent.

In addition, instead of or in addition to the protrusions of the engaging members 83a and 83b of the moving mechanism, magnets 151 may be arranged as shown in FIG. 15. By arranging the metal mechanism (dustproof cover) 64, the magnet 151 and the dustproof cover 64 are attracted by magnetic force, and the shield member 80 can be lowered when the X-ray generating section 60 is lowered. Thereby, the spring 86 that constrains the shield member 80 downward can be assisted. Alternatively, only the magnet 151 may be disposed without the spring 86.

Further, as shown in FIGS. 16 and 17, at the connection part 310 between the X-ray support arm 90 and the X-ray generation section 60, there is a gap between the lower surface of the first housing 61 and the lower surface of the second housing 91. In this structure, a second shield member 160 is arranged.

The second shield member 160 includes a sheet 161 and an expansion/contraction mechanism 162 that extends or shortens the length of the sheet. The sheet 161 has one end 163 fixed to the lower surface of the first housing 61 and the other end 164 fixed to the chassis 93 of the X-ray support arm 90. The expansion/contraction mechanism 162 may be placed at either one end or the other end, but in the example of FIG. 17, it is placed on the other end 164 side. The expansion/contraction mechanism 162 includes a pair of shafts 167 that cause the other end 164 to reciprocate in a bellows-like manner, an elastic member 165 that applies force in a direction that increases the distance between the shafts 167, and a frame portion 166 that supports the elastic member 165.

As a result, the sheet 161 can be extendably arranged between the lower surface of the first housing 61 and the lower surface of the second housing 91, so that as the X-ray generating section 60 rotates, the first housing 61 Even if the size of the gap between the lower surface and the lower surface of the second casing 91 changes, it can be closed and dust can be prevented from entering.

Note that the second shield member 160 uses a telescopic mechanism 162 that reciprocates the sheet 161 in a bellows shape, thereby realizing a thinner telescopic mechanism 162 than a mechanism that winds up the sheet 161 in a roll shape.

1 X-ray fluoroscopic imaging device 10 Stand section 11 Elevating mechanism 20 Connecting section 21 Rotation mechanism 30 Support frame 40 Top plate 41 Table 50 Support column 51 Support column moving mechanism 60 X-ray generation section 61 First housing 62 X-ray tube 63 Power cable 64 Mechanism (dustproof cover)
65 First opening 70 X-ray detector 80 Shield member 85 Guide rail 81 Band-shaped portion 82a Leg portion 82b Leg portion 83 Stay 83a Engagement member 83b Engagement member 84a Guide protrusion 84b Guide protrusion 86 Spring 90 X-ray support arm 91 Second housing 93 Chassis 101 X-ray generation section 112 High voltage generation section 114 X-ray image processing section 115 Display device 116 External storage section 117 Control section 118 Operation section 151 Magnet 160 Second shield member 161 Sheet 162 Expanding mechanism 163 One end 164 Other end 165 Elastic member 166 Frame 167 Shaft 200 X-ray diaphragm 300 X-ray rotation drive section 301 Rack 302 Pinion gear 303 Motor 304 Reducer 305 Pulley 306 Belt 310 Connection section

Claims (12)

an X-ray generating section, an X-ray supporting arm having one end connected to the X-ray generating section and supporting the X-ray generating section; an upper end connected to the other end of the X-ray supporting arm; It has a column that supports the support arm and a table on which the subject is mounted,
A rotation drive unit that rotates the X-ray generation unit about the longitudinal direction of the table, and a shield member are disposed at a connection portion between the X-ray support arm and the X-ray generation unit,
The X-ray generating section includes a first housing having a first opening, the X-ray support arm includes a second housing having a second opening, and the first opening and the second opening are facing each other with a predetermined gap in between at the connection part,
When the first opening of the X-ray generating section moves to a position higher than the second casing of the X-ray supporting arm as the rotation driving section rotates the X-ray generating section, The shield member covers a region of the first opening that is exposed above the second casing, and when the first opening of the X-ray generating section moves to a position lower than the second casing, An X-ray fluoroscopic imaging device, wherein the shield member covers an area of the second opening exposed above the first casing. The X-ray fluoroscopic imaging device according to claim 1,
The shield member has a plate shape and is arranged in the gap between the first opening and the second opening,
When the first opening of the X-ray generating section moves to a higher position than the second casing of the X-ray support arm, the shield member moves upward with the movement of the first casing. to cover a region of the first opening exposed above the second casing, and when the first opening of the X-ray generating section moves to a position lower than the second casing, the An X-ray fluoroscopic imaging device, characterized in that it does not move with the movement of the first casing and covers an area of the second opening exposed above the first casing. The X-ray fluoroscopic imaging device according to claim 1,
The shield member has a region exposed above the second casing of the first opening and a region exposed above the first casing of the second opening as the X-ray generating section rotates. a band-shaped part that covers an area to be covered, and leg parts that support both sides of the band-shaped part,
An X-ray fluoroscopic imaging device characterized in that the band-shaped portion and the leg portion are both plate-shaped and integrally formed. The X-ray fluoroscopic imaging device according to claim 3,
An X-ray fluoroscopic imaging apparatus, wherein an upper edge of the first opening, an upper edge of the second opening, and an upper edge of the shield member have matching curved shapes. The X-ray fluoroscopic imaging device according to claim 1,
Both the end portion of the first casing of the X-ray generating unit where the first opening is located and the end portion of the second casing of the X-ray support arm portion where the second opening is located. , has an arc shape along a locus of rotation of the X-ray generating unit by the rotational drive unit,
An X-ray fluoroscopic imaging device, wherein the main plane of the shield member is curved along the arc shape. The X-ray fluoroscopic imaging device according to claim 3,
The shield member includes a first opening in the case where the first opening of the X-ray generating section moves to a higher position than the second housing of the X-ray supporting arm as the X-ray generating section rotates. An X-ray fluoroscopic imaging device comprising a moving mechanism that moves one housing upward as the housing moves. The X-ray fluoroscopic imaging device according to claim 6,
The moving mechanism engages with a part of the mechanism of the X-ray generating section when the first opening of the X-ray generating section moves to a position higher than the second casing of the X-ray supporting arm. An X-ray fluoroscopic imaging apparatus characterized in that the engaging member moves the shield member together with the X-ray generating section. The X-ray fluoroscopic imaging device according to claim 7,
An X-ray fluoroscopic imaging apparatus, wherein the engaging member of the moving mechanism includes a protrusion and/or a magnet that engages with a part of the mechanism of the X-ray generating section. The X-ray fluoroscopic imaging device according to claim 7,
A part of the mechanism of the X-ray generating unit that engages with the moving mechanism is a dust cover disposed inside the first opening on both sides of the first housing. Photography equipment. The X-ray fluoroscopic imaging device according to claim 6,
An X-ray fluoroscopic imaging apparatus, wherein the moving mechanism includes an elastic member that biases the shield member downward. The X-ray fluoroscopic imaging device according to claim 6,
The X-ray fluoroscopic imaging apparatus is characterized in that the moving mechanism includes a guide rail and moves the shield member along the guide rail. 2. The X-ray fluoroscopic imaging apparatus according to claim 1, wherein at a connecting portion between the X-ray support arm and the X-ray generating section, a lower surface of the first housing and a lower surface of the second housing are connected. A second shield member is arranged in between,
The second shield member includes a sheet having one end fixed to the lower surface of the first casing and the other end fixed to the support arm, and a length of the sheet extended or shortened at the one end or the other end. An X-ray fluoroscopic imaging device comprising: an expansion/contraction mechanism that allows the

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