JPH10248839A - Pressing device for medical x-ray device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety for a subject by using a motor with an ON brake as a drive source of a presser element and providing a balance weight equivalent to the weight necessary for driving the presser element in a presser element drive mechanism from the motor to an arm mechanism for supporting the presser element. SOLUTION: A link 84 in an arm 83 is supported by a shaft 88 of a support mount 90, a roller 89 of the shaft 88 is guided by a guide groove 95, and a balance weight 100 having the weight of the whole support mount 90 is fixed to a U-shaped carriage 99. A low-efficiency reduction gear 101 is assembled to one of output shafts of a low-speed motor 104 of a fixed torque output which is arranged in the bottom end of the support base 93, an ON brake 102 is assembled to the other one, and a sprocket 103 is installed on the output shaft of the reduction gear 101. A chain 96 wound around a sprocket 1-5 which is rotatably arranged on the top end of the support base 93 is wound around the sprocket 103 and the support mount 90 and the carriage 99 are connected with its one side and the other side respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a compression apparatus for a medical X-ray apparatus such as an X-ray fluoroscopy table for performing a fluoroscopic imaging, and particularly to a medical X-ray apparatus for safety and cost reduction.
The present invention relates to a compression device for a wire device.

[0002]

2. Description of the Related Art A conventional compression apparatus for a medical X-ray apparatus is disclosed in Japanese Patent Publication No. 2-45453. Less than,
This will be described with reference to FIGS. 3 is an overall perspective view of the conventional compression device, FIG. 4 is a partial cross-sectional side view of the conventional compression device, FIG. 5 is a partial cross-sectional front view of the conventional compression device, and FIG.
FIG. 7 is a simplified diagram of the operation of the conventional compression device, and FIG. 7 is a diagram showing a medical X-ray device including the conventional compression device.

First, in FIG. 7, reference numeral 18 denotes a top plate on which a subject (not shown) is placed. Reference numeral 17 denotes a column which stands upright on the top plate 18 and has an X-ray source 16 attached to the upright end thereof. The X-ray imaging apparatus 10 is disposed below the top plate 18.

Next, in FIG. 3 to FIG.
7 is fixed on the surface on the top plate 18 side along the axial direction of the column 17, and the surface of the base 11 on the top plate 18 side is
Guide rails 21 and 22 each having a channel-shaped cross section are disposed to face each other. The guide rail 21 is provided with a notch 21A at a slightly upper portion thereof (see FIG. 5).
Reference numeral 12 denotes a support table which moves up and down in the direction of the arrow shown in FIG. 5 by using the guide rails 21 and 22 as a guide.
2 is formed to include opposed side plates 23, 24 and a rod 20 for connecting the both, and the side plates 23, 24 have rollers 25, 26 sandwiching guide rails 21, 22 as shown in FIG. , 27, and 28, respectively, and the support table 12 moves up and down by the rolling of these rollers. Reference numeral 13 denotes an arm having a hollow cross section whose base end is supported by the support base 12 by a shaft 51, and is rotatable up and down in the same plane as the vertical movement surface of the support base 12 with the shaft 51 as a fulcrum. Reference numeral 14 denotes a substantially L-shaped arm having a base end connected to the distal end of the arm 13 by a shaft 52, and is rotatable up and down in the same plane as the arm 13 with the shaft 52 as a fulcrum. 15 is the arm of the handle
4 is a pressurizer which is detachably attached to a tip of the test piece 4 by a knob 53 having a screw shaft and presses a test portion of the test subject. Can be rotated.

Reference numeral 31 denotes a base 3 fixed to an upper part of the base 11.
3 is a sheave supported on a base 34 fixed to a lower portion of the base 11, and a shaft 35 is supported on side plates 23 and 24 of the support 12 via bearings. With a sheave fixed to one end of the sheave 31,
The same rope 37 is wound around 32 and 35.

Reference numeral 38 denotes a motor fixed to the back wall of the base 11, and a pulley 39 is mounted on an output shaft of the motor 38. Reference numeral 41 denotes a worm speed reducer fixed to the back wall of the base 11 slightly below the motor 38, and a worm speed reducer 4
1, a pulley 44 is attached to the shaft end of the shaft 42 of the worm 46.
Is fixed, and the pulley 44 and the pulley 39 are connected by a belt 48. A sheave 47 is fixed to the shaft end of the shaft 43 supporting the worm wheel 45, and the sheave 47 is fixed to the sheave 47.
Similar to 35, a rope 37 is wound.

Reference numeral 55 denotes a strip-shaped link disposed in the arm 13, and a strip-shaped link 65 is fixed to the upper part of the link to form an L-shaped link. Are supported by a shaft 66 provided on the support base 12 and are rotatable in the same direction as the arm 13 about the shaft 66 as a fulcrum. 62 is a link connected to the upper part of the link 55 via a shaft 63 supported on the upper part of the link 55;
Reference numeral 4 denotes a link connected to the link 62 via a shaft 63 ', and the link 64 is fixed to the shaft 36. 56
Is a link having one end connected to the lower end of the link 55 via a shaft 57, and the other end of the link 56 is connected to the arm 14 via a shaft 58. A link 59 has one end connected to the links 55 and 56 via the shaft 57 and the other end connected to the arm 13 via the shaft 61.

Reference numeral 67 denotes a pinion mounted on the end of the shaft 36, 68 denotes a sector gear meshing with the pinion 67, and the sector gear 68 is rotatably mounted on the shaft 66. 69 are attached.

A weight 71 is provided on a bearing 73 attached to the lower part of the back wall of the base 11 so as to be rotatable via a shaft 72, and a weight 74 is supported on a shaft 75 fixed to the weight 71. A sheave 76 is a support plate fixedly mounted on the base 11 via a plurality of rods 77. The support plate 76 is provided with sheaves 78 and 79. And the rope 37
Has one end fixed to the sheave 47 and the sheaves 78, 7
After being wound around the sheave 35 after passing through the sheaves 31, 32,
The other end is fixed to the sheave 47 via 74 and 79.

Next, the operation of the conventional compression device will be described with reference to FIG. When the motor 38 is driven in a state where the compression device shown in FIG. 4 is folded (a state where the compression device is in the retracted position),
The pulley 39 is turned in the direction of arrow A, and at the same time, the pulley 44 is turned in the direction of arrow B via the belt 48, and the sheave 47 is turned via the worm 46 and the worm wheel 45, and the rope 37 is moved in the direction of the arrow. Move in the C direction. Movement of the rope 37 causes the sheave 35 to move around the axis 36 by an arrow D.
In this direction (in this case, counterclockwise), and at the same time, the link 64 fixed to the shaft 36 also rotates by the same amount in the direction of arrow D. The rotation of the link 64 causes the link 62 to move
The link 65 and the link 55, which are pulled upward through the 3 'and are also fixedly formed in the L-shape,
6 around in the direction of arrow E. When the link 65 and the link 55 rotate in the direction of arrow E, the link 56
The shaft 58 connecting the link 56 and the arm 14 is pulled upward through the arrow F around the shaft 52.
In the direction of. At the same time, the link 59 is pulled upward, and is pushed in a direction to push out the arm 13 via the shaft 61 while rotating the link 59 around the shaft 61 in the direction of arrow G. By this pushing, the arm 13 is turned around the axis 51 in the direction of arrow H, and at the same time, the arm 14 and the presser 15 are turned around the axis 52 in the direction of arrow J, and the It is protruded forward of the base 11 to a position (insertion position) at the center in the X-ray irradiation field, which is substantially horizontal.

On the other hand, when the rope 37 is moved in the direction of arrow C until the protruding of the compression element 15 or the like is completed, FIG.
5, a shaft 36 that rotates integrally with the sheave 35.
The pinion 67 is also rotated to rotate the sector gear 68 and the roller 69 mounted on the sector gear 68 around the axis 66 (in this case, clockwise), and the roller 69 is provided on the guide rail 21. The support base 12 is released from the cutout 21A to unlock the vertical movement of the support base 12, and the roller 69 is brought into contact with the guide rail 21 on the side of the guide rail 21 where the cutout 21A is not provided. The rotation of the pinion 67 and the sector gear 68 is stopped by this contact. By releasing the lock, the support table 12 can be lowered. That is, if the motor 38 still rotates in the direction of arrow A in this state, the rope 37 pulls down the sheave 35 in the direction of arrow C, and the support base 12 moves in the compression direction, and the compression element 15 moves to a predetermined position. Is pressed to press the subject on the table 18.

The compression force of the compression element 15 against the subject increases when the tension on the winding side of the rope 37 of the sheave 74 increases due to the compression of the compression element 15 and the weight 71 rotates around the shaft 72. The moved weight 71 activates a switch (not shown) to stop the motor 38, stops the lowering movement of the support base 12, and prevents overpressure so that the pressing force does not increase further. A switch is provided which operates by rotating the coil spring (not shown), and stops the motor 38 by the compression. The operating position of the switch is changed by adjusting the compression amount of the coil spring. Can be provided.

When the pressing operation is completed, the motor 38 is rotated in the reverse direction. In this case, since the roller 69 rolls along the guide rail 21, the rotation of the pinion 67 and the sector gear 68 is stopped, and the presser 15 and the like move upward together with the support table 12 in a protruding state. When the support 12 reaches the uppermost position by the movement, the roller 69 is fitted into the notch 21A of the guide rail 21 and locked at the position, and the raising movement stops. Compression 15
Are folded into the state shown in FIG. 4 by the operation opposite to the above, and the entire compression device is stored within the width of the column 17 and along the column 17 as shown in FIG.

[0014]

In the above-mentioned conventional compression device, a component (elevator) for raising and lowering the compression unit 15 itself is heavy, and uses a motor 38 having a high rotation speed and a reduction gear 41 having a low efficiency. Therefore, even if the presser 15 is manually pushed, the presser 15 does not move, and it is impossible to retreat the presser 15 manually in an emergency such as over-compression or during a power failure during compression. For this reason, the knob 53 has been loosened to retract the presser 15.

Further, since the motor 38 having a capacity not less than the compression force (80N) is used, if the compression force cannot be controlled due to the abnormality of the motor 38 and the detection of the compression force, the compression force is not less than the compression force (overcompression). Therefore, there is a possibility that the subject will be pressed. Further, the link mechanism, the drive mechanism, and the compression detection mechanism have been complicated and expensive.

According to the present invention, in the event of an emergency or a power failure, the compression unit can be manually evacuated to release the compression, thereby improving the safety for the examinee. Even if it becomes impossible to control the medical X-ray, it becomes impossible to compress the subject with more than the compression force, improving the safety for the subject and reducing the cost with a simple configuration. It is an object to provide a compression device for the device.

[0017]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a compression apparatus for a medical X-ray apparatus, which is used for releasing a compression in an emergency such as over-compression or during a power failure during compression.
Using a motor with an ON brake as a drive source for the compression device,
A balance weight corresponding to the weight required for driving the compression element is provided in the compression element driving mechanism from the motor to the arm mechanism supporting the compression element. Further, a motor having a capacity equal to or less than a predetermined compression force (for example, 80 N) is used as a motor for driving the compression element in the compression direction. Further, the drive mechanism of the presser is constituted by an arm opening / closing mechanism having only a simple four-bar link which is opened and closed by a guide groove which can rotate and move linearly.

By turning off the drive power supply in an emergency or a power failure, the brake is released and the pressurizer can be manually retracted. In addition, by using a motor with a compression force (80N) or less, even if the compression force becomes uncontrollable due to abnormalities in the motor and compression force detection, the subject can be over-compressed (over-compression). The compression becomes impossible, and the safety for the subject is improved. Further, it is possible to manufacture a low-cost compression device by a simple configuration such as an arm opening / closing mechanism having only four-bar links.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional side view showing an embodiment of a compression device of a medical X-ray apparatus according to the present invention, and FIG. 2 is a partial side view of the compression device of the present invention shown in FIG.

In FIG. 1, an L-shaped guide groove 95 which is rotatable and linearly movable toward the center at the front side in a support base 93.
Is fixed. Rollers 91 and 92 are provided on the support base 90 so as to be rotatable up and down, respectively.
The support table 90 moves up and down by the guide groove 95.

Reference numeral 83 denotes an arm whose rear end is supported by a support 90 by a shaft 87.
0 can be rotated in the vertical direction on the same plane as the vertical movement plane. Reference numeral 82 denotes a link that fixes the presser 81 to one end on the X-ray cone side, and has a center connected to the tip of the arm 83 by a shaft 85 and the other end connected to a link 84 by a shaft 86. The arm 83 can be rotated vertically in the same plane with the fulcrum 86 and the shaft 85 as fulcrums.

Reference numeral 84 denotes a band-shaped link (crank) disposed in the arm 83, which is supported by a shaft 88 provided on a support table 90. A roller 89 is rotatably provided near the upper portion of the shaft 88. And is guided by the guide groove 95.
Further, it is rotatable about the shaft 88 in the same direction as the arm 83. The U-shaped carriage 99 has a balance weight 100 of the weight of the entire support base 90 that moves up and down to the side.
Are fixed, and rollers 97 and 98 are provided rotatably at the top and bottom, respectively, and the carriage 99 is vertically moved by a guide 95.

Reference numeral 104 denotes a low-speed constant-torque output motor disposed at the lower end of the support base 93. One of the output shafts of the motor 104 is combined with a low-efficiency reducer 101, and the other is turned on. The brake 102 is combined. The output shaft of the reduction gear 101 has a sprocket 103
Is installed. Reference numeral 105 denotes a sprocket rotatably disposed at the upper end of the support base 93. The chain 96 is wound around the sprocket 105 and the sprocket 103, and a support base 90 is connected to one side of the chain 96 and a trolley 99 is connected to the other side. That is, the support 90
And the carriage 99 are connected by a chain 96 and can be relatively moved vertically by a guide groove 95.

The position detector 106 is fixed in the vicinity of the R-shaped guide groove 95 of the side plate 94, and detects that the roller 89 is on the curved portion of the guide groove 95.

Next, the operation of the above-described compression device of the present invention will be described with reference to FIGS. Now, as shown in FIG. 2, when the compression device operation switch (not shown) is turned on in a state where the compression device of the present invention is folded (in a retracted position), the ON brake 102 shown in FIG. Motor 104
Drive. As a result, the sprocket 103 is rotated via the speed reducer 101, and simultaneously the sprocket 105 is also rotated via the chain 96 in the same direction, so that the entire support base 90 connected by the chain 96 is moved downward (compression). Direction).

When the support table 90 moves downward (compression direction), the roller 89 moves in the A 'direction along the curved portion of the guide groove 95 as shown in FIG. And rotates in the direction of B ′. When the link 84 rotates in the direction B ′, the link 82 is pushed upward via the shaft 86 and simultaneously the arm 83 is pushed upward via the shaft 85. By this pushing up, the arm 83 moves the shaft 87
, And at the same time, the link 82 is rotated about the axis 85 in the C ′ direction, so that the compression element 81 is substantially horizontal at the center in the X-ray irradiation field as shown in FIG. The support 90 is projected forward to a position (insertion position).

Next, when the roller 89 reaches the linear portion of the guide groove 95, the rotation of the link 84 ends, and the arm 83,
The links 82 and 84 move in the compression direction in the inserted state,
The presser 81 and the like are lowered to a predetermined position, and press the subject on the top board 18. On the other hand, the trolley 99 on which the balance weight 100 is mounted keeps the weight balance with the entire supporting base 90 that moves, and moves in the opposite direction to the supporting base 90.

The compression element 81 applies a compression force (8
0N) or less, and is set to a value obtained by dividing the torque of the motor 104 having a constant torque output capable of adjusting the torque by the radius of the sprocket 103. Do not oppress people. When the compression device operation switch is turned off, the brake 102 is locked, and the motor 104 is stopped and locked. When the drive power supply of the device is turned off, the brake is released.

[0029]

As described above, according to the present invention, in an emergency or a power failure, the driving power is turned off to release the brake and the retractor can be manually evacuated, thereby improving the safety for the subject. . In addition, by using a motor having a capacity equal to or less than a predetermined compression force (for example, 80 N) as a motor for driving the compression element in the compression direction, even if the compression force cannot be controlled due to abnormality in the motor and compression force detection. It becomes impossible to compress the subject with a compression force or more (over-compression), and the safety for the subject is improved. Further, there is an effect that the configuration is simple as described above and the price can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of the compression device of the present invention.

FIG. 2 is a partial side view of the compression device of the present invention shown in FIG. 1 in a retracted position state.

FIG. 3 is an overall perspective view of a conventional compression device.

FIG. 4 is a partially sectional side view of the same.

FIG. 5 is a partial sectional front view of the same.

FIG. 6 is an explanatory diagram of the operation.

FIG. 7 is a diagram showing a medical X-ray apparatus including a conventional compression device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 X-ray imaging apparatus 11 base 12 support 13, 14 arm 15 compressor 16 X-ray source 17 support 18 top plate 81 compressor 82 link 83 arm 84 link (crank) 85 to 88 shaft 89 roller 90 support 91 , 92 roller 93 support base 94 side plate 95 guide groove 96 chain 97, 98 roller 99 trolley 100 balance weight 101 reducer 102 ON brake 103, 105 sprocket 104 constant torque output motor 106 position detector

Claims (3)

[Claims] 1. A presser is supported by an arm mechanism above a top plate by a support for supporting an X-ray tube, the arm mechanism is driven by a drive source, and the presser is retracted to a retracted position and irradiated with X-ray photography. In a compression device of a medical X-ray apparatus for moving between an insertion position located at the center of a field and a compression position for compressing a subject on the top plate, the driving source is a motor with an ON brake, and A compression device for a medical X-ray apparatus, comprising a balance weight corresponding to the weight required for driving the compression device in the compression device driving mechanism leading to the arm mechanism, and enabling manual retraction of the compression device when the driving power is turned off. apparatus. 2. The compression apparatus for a medical X-ray apparatus according to claim 1, wherein a motor having a capacity equal to or less than a predetermined compression force is used as a motor for driving the compression element in the compression direction. 3. The armature is rotated to fold or open to open and close the compression unit between a retracted position along a side surface of a column of the medical X-ray apparatus and an insertion position located at the center of the X-ray irradiation field. A supporter movably provided along a central axis of an X-ray cone for compressing the support, and an ON brake for driving the supporter. A constant torque motor, a balance weight having substantially the same weight as the support base, a crank rotatably mounted on the support base at one end as a fulcrum, and an arm having the compression element mounted at the tip and one end to the support base. A four-bar link mechanism in combination with a link rotatably mounted with a fulcrum as a fulcrum, a guide groove rotatable and linearly movable on the support column side, a position detector of the compression element, and a torquer for the motor. A compression device for a medical X-ray device, comprising: a compression control device.