JPH07265288A - Imaging device driving mechanism for x-ray radioscopic photographing base - Google Patents

Abstract

PURPOSE:To reduce the number of part items and reduce the cost. CONSTITUTION:This imaging device driving mechanism for an X-ray radioscopic photographing base moves an image device 31 in the longitudinal direction of a table support frame 3 erectably supporting a top plate 1 to position it in the living body axis direction for the X-ray fluoroscopic photographic of an examinee on the top plate 1. A driving unit 23 is provided on the imaging device 31 side, and a pinion 22 is provided on the output shaft of the driving unit 23. The pinion 22 is meshed with a rack 3c provided on the table support frame 3 in the longitudinal direction so that the imaging device 31 is self- traveled in the longitudinal direction of the table support frame 3 by the action of the driving unit 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving mechanism for an image device of an X-ray fluoroscopic imaging table.

[0002]

2. Description of the Related Art An X-ray fluoroscopic imaging stand is composed of an X-ray tube device, a diaphragm device, a quick-shooting device, and an image intensifier (hereinafter referred to as I.
Abbreviated as I. ) And a television camera, etc., and this imaging device normally enables positioning in the body axis direction for X-ray fluoroscopic imaging of a subject on a table (table). It is movable in the longitudinal direction of the tiltable table support frame, that is, in the body axis direction of the subject.

The image device drive mechanism for making the image device movable in this way has conventionally been constructed as shown in FIG. In FIG. 3, 12 is an X-ray tube device, 13 is a diaphragm device, 15 is a quick-shooting device, 16 is II, 17 is a television camera, and these constitute the image device 31 as described above. 32 is a drive which is installed on one side in the longitudinal direction (left and right direction in FIG. 3) of the table support frame 3 which can be moved up and down, and which includes, for example, a motor, a speed reducer, and a rotation transmission mechanism (not shown) between them. A unit, 33 is a sprocket connected to the output shaft of the drive unit 32, 34 is an idler sprocket provided near the other end of the table support frame 3 in the longitudinal direction, and 35 is a shaft for supporting the idler sprocket 34. Reference numeral 36 is a chain which is wound around the sprockets 33 and 34, and a metal fitting 37 for connecting to the video device 31 is provided in an intermediate portion between the sprockets 33 and 34.

In such a configuration, the video device 31
Is driven by transmitting the rotational force of the drive unit 32 to the chain 36 via the sprocket 33 and to the image device 31 via the metal fitting 37 provided on the chain 36.

[0005]

As described above, according to the conventional technique, the drive unit 32 provided inside the table support frame 3 is used.
Since the image device 31 is driven via the chain 36 by the above, as a power transmission component other than the drive unit 32,
At least a pair of sprockets 33, 34 and chain 3
6, shaft 35 for supporting idler sprocket 34
However, a large number of bearings (not shown), metal fittings 37 for connecting to the video device 31, and the like are required, which causes a problem of high cost.

An object of the present invention is to provide an image device driving mechanism of an X-ray fluoroscopic imaging stand which can be constructed with a small number of parts and can be manufactured at low cost.

[0007]

SUMMARY OF THE INVENTION The above-mentioned object is to enable an imaging device to support the top plate in order to enable positioning in the body axis direction for X-ray fluoroscopic imaging of a subject on the top plate. In the image device drive mechanism of the X-ray fluoroscopic imaging table that moves in the longitudinal direction of the tiltable table support frame, a drive unit is provided on the image device side, and a pinion is provided on the output shaft of this drive unit. This is achieved by engaging a table support frame with a rack provided in the longitudinal direction of the table support frame.

[0008]

When the drive unit operates, the pinion rotates. Since this pinion meshes with the rack provided on the table support frame in the longitudinal direction thereof, the image device provided with the drive unit by the rotation of the pinion is arranged in the longitudinal direction of the table support frame, that is, the body of the subject. It runs and moves along the axial direction.

According to this, only the pinion provided on the output shaft of the drive unit and the rack provided on the table support frame are the only power transmission components other than the drive unit.
Compared with those of conventional mechanisms (at least a pair of sprockets, chains, shafts and bearings for supporting idler sprockets, metal fittings for connecting with a video device, etc.), the number of parts is remarkably small and the cost is reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of an X-ray fluoroscopic imaging table to which the image device driving mechanism according to the present invention is applied, and FIG. 2 is a view taken from the right side with a part of the line AA in FIG. 1 being cut. It is a figure.

In both figures, 1 is a top plate (table), 1
a is a step, and these are F.S. R. It is integrally molded using P (fiber reinforced plastic). Table frames 1b and 1c are fixed to the lower portion of the top plate 1.

The lower end of the table frame 1b is bent laterally, and two pairs are attached to the support plate 3a fixed to the table support frame 3 (one pair at each of two positions separated by a predetermined distance in the direction perpendicular to the plane of FIG. 1). It functions as a rail that moves while being sandwiched between the rollers 2.

On the other hand, a pair of bearings 4a of the linear motion bearing unit 4 are attached to the table frame 1c at predetermined intervals in the direction perpendicular to the plane of FIG. 1, and the linear motion bearing unit 4 attached to the table support frame 3 is attached. 1 on the rail 4b of
It can move in the direction perpendicular to the paper surface. Also, the table frame 1c
A rack 5 is fixed along the moving direction, and the rack 5 meshes with a pinion 6 on an output shaft of a reducer-integrated motor 7 attached to the table support frame 3.

A shaft 3b is attached to the front side of FIG. 1 (left side of FIG. 2) of the table support frame 3, and this shaft 3b is attached.
Are supported by legs 10 installed on the floor 100. On the other hand, a sector gear 8 is attached to the table support frame 3 on the far side in FIG. 1 (right side in FIG. 2), and the sector gear 8 is attached to the leg 10 and integrated with the speed reducer motor 1.
1 meshes with the pinion 9 on the output shaft. An arcuate groove 8a is provided on the side surface of the sector gear 8, and a pair of rollers 10a attached to the leg 10 are fitted in the groove 8a.

On the other hand, as shown in FIG. 2, in the table support frame 3, rails 3c with racks and rails 3d are arranged in the longitudinal direction of the table support frame 3, that is, in the direction perpendicular to the plane of FIG.
Rollers 19 to 2 attached to the video device support frame 18 on these rail surfaces.
No. 1 rolling surface is in contact. Also, rail with rack 3
The rack surface of c is meshed with the pinion 22 on the output shaft of the reduction gear integrated motor (drive unit) 23 attached to the video device support frame 18.

On the video device support frame 18, a quick-shooting device 15 is provided.
Is fixed, and an X-ray tube device 12 and a diaphragm device 13 are mounted on it via a support frame 14 of the X-ray tube device so as to be opposed to the quick-shooting device 15 with the top plate 1 interposed therebetween.
An II 16 and a television camera 17 are attached below the quick-shooting device 15.

In the above structure, when the reduction gear-integrated motor 7 is rotated, the pinion 6 on the output shaft of the motor 7 rotates, and the rack 5 meshed with the pinion 6 moves in the direction perpendicular to the plane of FIG. . Rack 5 is a table frame 1c
Since the table frame 1c is supported on the table support frame 3 by the linear motion bearing unit 4, the table frame 1c moves on the table support frame 3 by the rotation of the speed reducer integrated motor 7. Moves vertically to the page. Therefore, one end is fixed on the table frame 1c, and the other end is fixed on the table frame 1b, the roller 2 and the support plate 3a.
The top plate 1 supported on the table support frame 3 via the shaft moves in the direction perpendicular to the plane of FIG. 1 by the rotation of the speed reducer-integrated motor 7.

When the reducer-integrated motor 11 is rotated, the pinion 9 on the output shaft of the motor 11 is rotated, and the sector gear 8 meshed with the pinion 9 is rotated. The sector gear 8 is rotatably supported on the leg 10 via a roller 10a fitted in an arcuate groove 8a provided on the side surface thereof, and is fixed to the table support frame 3. On the other hand, the shaft 3b on the left side of FIG.
The portion is supported by the leg 10, and the rotation center of the shaft 3b and the arc-shaped groove 8a on the side surface of the sector gear 8 coincide with each other. Therefore, when the reducer-integrated motor 11 is rotated, the table support frame 3 is rotated. The top plate 1 rotates about the shaft 3b.

Reducer integrated motor (drive unit) 23
When is rotated, the pinion 22 on the output shaft of the motor 23 rotates. The pinion 22 meshes with the rack surface of the rack-equipped rail 3c mounted in the longitudinal direction of the table support frame 3. In addition, the reduction gear integrated motor 23
Is fixed to the video device support frame 18, and this support frame 1
Numeral 8 is supported on the table support frame 3 via rollers 19 to 21, rails 3c with racks and rails 3d so as to be movable in the left-right direction in FIG. Therefore, when the speed reducer-integrated motor 23 is rotated, the image device support frame 18, the quick-shooting device 15, II 16, the television camera 17, the X-ray tube device support frame 14, the X-ray tube device 12, and the diaphragm device 13 are in other words. For example, the imaging device 31 moves on the table support frame 3 in the longitudinal direction (the horizontal direction in FIG. 1), that is, the body axis direction of the subject.

As described above, the operator controls the rotations of the three speed reducer-integrated motors 7, 11, 23 by the operator via a controller (not shown), so that the top plate 1 integrated with the step 1a is formed.
1, movement in the direction perpendicular to the plane of FIG. 1, rotation about the axis 3b, and a quick-shooting device 15 arranged so as to face the top plate 1,
The II 16, the television camera 17, the X-ray tube device 12, and the diaphragm device 13 can be moved in the left-right direction in FIG. 1.

Therefore, the subject is laid on the top plate 1 integrated with the step 1a, and the operator controls the rotation of the three speed reducer-integrated motors 7, 11, 23,
The quick shooting device 15, II 16, the television camera 17, the X-ray tube device 12, and the diaphragm device 13 can be moved to appropriate positions with respect to the subject, and a perspective image and a photograph of the subject can be obtained. .

According to the above-mentioned mechanism of the present invention, the pinion 22 provided on the output shaft of the drive unit is used as the power transmission component other than the drive unit (the speed reducer-integrated motor 23).
And a rack (rail 3c with a rack) provided on the table support frame 3 side, and a shaft 35 and a bearing for supporting that of the conventional mechanism (at least a pair of sprockets 33, 34, a chain 36, and an idler sprocket 34). , The number of parts required is significantly smaller than that of the metal fitting 37 or the like for connection with the video device 31 (see FIG. 3), and the cost can be reduced.

In addition to the power transmission parts, a structure for supporting the weight of the image device 31 and a guide for moving the image device 31 is necessary for the positioning movement of the image device 31. The invention mechanism and the conventional mechanism have the same conditions in terms of configuration or cost, and the weighting load is not required only for the mechanism of the present invention.

Further, according to the above-mentioned mechanism of the present invention, the moving stroke of the image device 31 can be made longer than that of the conventional mechanism, and the X-ray fluoroscopic imaging of the target portion can be performed without being influenced by the height of the subject. There is also the effect of becoming. That is, in the conventional mechanism, as shown in FIG. 3, the drive unit 32 is installed on one side in the longitudinal direction of the table support frame 3 (on the right side in the drawing), while the image device 31 is partially shown in FIG. In the example shown, the quick-shooting device 15, II 16, and TV camera 17 are located inside the table support frame 3. For this reason,
The image device 31 is placed on one side of the table support frame 3 (on the right side in the drawing).
When it is moved to, the quick-shooting device 15, II 16, and the TV camera 17 will collide with the drive unit 32. Therefore, in order to avoid it, the drive unit 32
Therefore, the moving stroke of the video device 31 must be reduced by the installation space.

On the other hand, in the mechanism of the present invention, the drive unit (motor 23 integrated with the speed reducer) is provided on the image device 31 side. In the lower portion of the image device 31 (the portion located inside the table support frame 3), there is usually an extra space to the extent that a drive unit (motor with integrated speed reducer 23) can be installed. If a reducer-integrated motor 23) is installed, the drive unit 3 of the conventional mechanism can be installed.
2 (see FIG. 3) The inner portion of the table support frame 3, which is the installation location, can be used as an empty space. The vacant space can be used as a space for the moving stroke of the image device 31, and the moving stroke of the image device 31 can be made longer than that of the conventional mechanism, and the object can be achieved without being influenced by the height of the subject. X-ray fluoroscopic imaging of the site is possible.

[0026]

As described above, according to the present invention, the number of power transmission components for moving the imaging device in the longitudinal direction of the table support frame (the body axis direction of the subject) is significantly smaller than that of the conventional mechanism. The points are sufficient, and the cost can be reduced.

Further, according to the present invention, the moving stroke of the imaging device can be made longer than that of the conventional mechanism, and the X-ray fluoroscopic imaging of the target portion can be performed without being influenced by the height of the subject. There is also.

[Brief description of drawings]

FIG. 1 is an X to which an image device driving mechanism according to the present invention is applied.
It is a front view which shows an example of a fluoroscopic imaging stand.

FIG. 2 is a diagram in which a part taken along the line AA in FIG. 1 is partially cut and viewed from the right side.

FIG. 3 is a front view showing a conventional mechanism.

[Explanation of symbols]

 1 Top Plate (Table) 1a Step 1b Table Frame 1c Table Frame 2 Roller 3 Table Support Frame 3a Support Plate 3b Shaft 3c Rack Rail 3d Rail 4 Linear Motion Bearing Unit 4a Bearing 4b Rail 5 Rack 6,9,22 Pinion 7, 11 Reducer-integrated motor 8 Sector gear 8a Arc-shaped groove 10 Legs 10a, 19-21 Roller 12 X-ray tube device 13 Drawing device 14 X-ray tube device support frame 15 Quick-shooting device 16 II 17 Television camera 18 Video device support frame 23 Reducer integrated motor (drive unit) 31 Video device 32 Drive unit 33 Sprocket 34 Idler sprocket 35 Shaft supporting the idler sprocket 36 Chain 37 Metal fittings

Claims (1)

[Claims] 1. In order to enable positioning of a subject on a tabletop in the body axis direction for X-ray fluoroscopic imaging, an image device is mounted on a table support frame that supports the tabletop and can move up and down. In the image device drive mechanism of the X-ray fluoroscopic imaging table that is moved in the longitudinal direction, a drive unit is provided on the image device side, and a pinion is provided on the output shaft of this drive unit, and this pinion is attached to the table support frame in the longitudinal direction. The image device is self-propelled in the longitudinal direction of the table support frame by the operation of the drive unit.
An image device driving mechanism of an X-ray fluoroscopic imaging table, which is characterized by moving.