JPH0421525Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an X-ray tomography apparatus, and particularly to a tomography apparatus suitable for use in tomography of local parts of the human body such as the temporomandibular joint.

[Conventional technology]

Recently, general medical institutions, mainly dental clinics, are treating non-infectious diseases with symptoms such as pain in the temporomandibular joint, joint noise, trismus, or abnormal jaw movement.
The number of patients complaining of so-called temporomandibular joint symptoms is gradually increasing, and there is a need for early elucidation of the pathology and etiology of these temporomandibular joint disorders. X-ray tomography is cited as an indispensable diagnostic method for understanding the pathology and differential diagnosis of these temporomandibular joint disorders.

As is well known, tomography devices that take X-rays of a predetermined cross section of the human body to examine internal disease states are mainly used in large-scale medical institutions. There are single-orbit tomography apparatuses in which a tube is reciprocated and oscillated on a specific orbit, and multi-orbit tomography apparatuses in which a tube is arbitrarily rotated and oscillated within a certain range.

Among these tomography apparatuses, an example of a multi-orbit tomography apparatus is shown in FIG. 10, which is a front view thereof, and FIG. 11, which is a side view thereof.

In this conventional multi-orbital tomography apparatus, an X-ray tube 51 is attached in front of the upper end of a column 52, which consists of a plurality of parallel shafts arranged horizontally and vertically. The column 52 is rotatably supported via a main shaft 55 at the tip of a support arm 54 provided in the upper horizontal direction of the base 53, and is supported by a support mechanism provided at its lower end. A film mounting board 56 disposed in front of the lower end is supported so as to swing while maintaining the horizontal position. Further, above the film mounting board 56, a mounting plate 57 on which a subject is placed is disposed in the horizontal direction.

This tomography apparatus includes an X-ray tube 51 supported on the upper part of the support column 52 which is swung back and forth and left and right by a drive means (not shown).
The film mounting plate 56 supported at the bottom is swung in opposite directions to draw an arc back and forth and left and right, as shown by the arrows in the figure, and the swing locus is created by combining the back and forth and lateral movements. Draw and sway.

Then, this X-ray tube 51 and film mounting board 56
Due to the relative movement of the subject placed on the mounting plate 57, parts other than the cut plane 58 shown by the dotted line in the figure are blurred, and only the cross section located on the cut plane 58 is photographed clearly.

On the other hand, as another type of imaging device capable of taking X-ray images of the temporomandibular joint of the human body, a curved tomography device, a so-called panoramic tomography device, which is mainly used in dental clinics is known.

An example of these curved surface tomography apparatuses is shown in FIG. 12, which is a side view thereof, and FIG. 13, which is a sectional view taken along line AA in FIG. 12.

In this conventional curved tomography apparatus, an X-ray tube 61 is suspended and supported from the front end of a horizontally disposed swing arm 62. The swinging arm 62 is supported so as to be able to swing freely via a vertical rotation shaft 65 connected to a drive unit 66, and has a slit plate 63 provided with a vertical slit 71 at its rear end, and a film mounting drum 64. is suspended and supported.

The drive unit 66 is supported above and in front of the column 69 via a support arm 68 . Further, a truncated guide plate 67 supported by a column 69 is provided below the film mounting drum 64 , and the subject 70 , that is, the head of a human body, is located at the front end of the truncated guide plate 67 located in front of the slit plate 63 . placed above the department.

In this conventional curved tomography apparatus, a pivoting arm 62 is pivoted in the horizontal direction about a rotating shaft 65, and an X-ray tube 61 is suspended from the front end of the pivoting arm 62, and a slit plate 63 is provided below the rear end. and the film mounting drum 64 are rotated in opposite directions to each other as shown by the arrows in FIG. The X-ray tube 61 and the slit plate 63 are moved in the horizontal direction by a cam mechanism, thereby adjusting the relative movement between the X-ray tube 61 and the slit plate 63 so as to approximately follow the imaging curved surface of the subject 70. Further, the film mounting drum 64 is
The rotating arm 62 rotates in a direction opposite to that of the X-ray tube 61.

This relative movement between the X-ray tube 61 and the film mounting drum 64 and the
Due to the line incidence control effect, the subject 70 is photographed with only the predetermined curved surface clearly visible.

[The problem that the idea aims to solve]

However, in the former tomography device, the X-ray tube device and the film mounting board are connected through a large number of movable connecting parts and connecting members, and the configuration is relatively complicated. In order to ensure that the relative movement between the device and the film mounting plate is accurate enough to obtain clear tomographic images, the processing accuracy of each component must be precise, the assembly accuracy must be increased, and the rigidity after assembly must be high. It is necessary to do so.

Therefore, it is difficult to make these conventional tomography devices compact, and they are also relatively large and expensive, requiring a lot of processing and assembly man-hours to manufacture. Currently, it is only introduced and installed in institutions.

On the other hand, the latter curved tomography device originally
It is used for comprehensive diagnosis of the entire jaw area of the face, centering on the dentition, and although it is possible to take tomographic images of the temporomandibular joint area, its cut surface is limited to a vertical arc-shaped curved surface; Unable to blur direction,
In addition, it is troublesome to examine an object captured on a curved surface on a flat surface, and it must be said that it is not suitable for examining specific parts such as temporomandibular joints.

For this reason, there is a strong demand for the supply of portable and inexpensive tomography equipment so that local tomography of temporomandibular joints, etc. can be easily performed at each medical institution, mainly general dental clinics. .

This idea was created in view of the above problems.
Multi-orbit tomography of any local part of the object can be performed, and the structure can be made simple and compact, and the man-hours and man-hours required for manufacturing can be reduced.
The object of the present invention is to provide a tomography apparatus that can reduce costs.

[Means to solve the problem]

In order to achieve the above object, the present invention has the following configuration. That is, the tomography apparatus according to the invention of the first claim includes a base disposed in the vertical direction, a swing shaft disposed through the base in the front-back direction, and a swing shaft that swings the swing shaft. a swinging means, an X-ray source suspended and supported by the front end of the swinging shaft and whose height is below the bottom edge of the base; and an X-ray source disposed behind the base parallel to the base. A tomography apparatus comprising a swinging plate having a film mounting surface on a corresponding lower front surface, wherein the swinging shaft is based on an intermediate portion near the rear end, and the rear end is the swinging plate; The swing plate is connected to the base via at least two link members and the swing shaft, and the link members and the swing shaft are perpendicular to each other on the same plane in the vertical direction. The base plate and the swing plate are each swingably connected to the base and the swing plate via connection members that are rotatable about two axes.

Further, the tomography apparatus according to the invention of the second claim includes a base that is disposed in the vertical direction and has a window-like opening that penetrates in the front-back direction at an intermediate part of the base in the vertical direction, and a swinging shaft disposed passing through the upper part in the front-rear direction; a swinging means for swinging the swinging shaft; suspended and supported by the front end of the swinging shaft;
X whose height position corresponds to the window-like opening of the base
A tomography apparatus comprising: a radiation source; and a swinging plate disposed behind the base in parallel with the base and having a film mounting surface on the front surface of a portion corresponding to the window-like opening of the base, A moving shaft is connected to an intermediate portion near its rear end as a base and a rear end thereof to a swing plate, and the swing plate is connected to the swing plate via at least two link members and the swing shaft, The link member and the swing shaft are connected to the base, and
It is swingably connected to the base and the swing plate through connection members that are rotatable about two axes that are perpendicular to each other on the same plane in the vertical direction.

〔Example〕

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

First Embodiment FIG. 1 is a side view with main parts cut away showing a tomography apparatus according to a first embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line AA in the figure, and FIG. 3 is a sectional view taken along line BB in FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a base, and the base 1 is made of a metal member and has a rectangular plate shape.
0 and are arranged in the vertical direction.

A U-shaped cut-out guide frame 2 with a notch facing downward is provided below the base 1.

In addition, the cutting surface guide frame 2 is arranged such that the position in the front and back direction is set to the cutting surface 2.
1, and thereby guides the object 22 charged from below so that its predetermined cross section is located on the cut surface 21 shown by the dotted line in FIG. There is.

Reference numeral 3 denotes a swinging board, and the swinging board 3 is made of a metal member, and its outer shell is longer than the base 1 below.
It has a rectangular plate shape, and is arranged in the vertical direction behind the base 1 in parallel with the base 1, and
On the front of the lower part corresponding to the 2 parts of the lower cutting surface guide frame,
A film mounting surface portion 4 for removably holding an X-ray photographic film is provided.

Reference numeral 5 denotes a swing shaft, and the swing shaft 5 is made of metal and has a square bar shape, and is disposed so as to penetrate the center portion of the base 1 near the lower end in the front-rear direction. Further, the swing shaft 5 suspends and supports the X-ray tube 6 at its front end via a support member 11 having a front-rear position and attachment angle fine adjustment means, while an intermediate portion near the rear end is attached to a base 1. The rear end portions are swingably connected to the swing plate 3 via connecting members 7, respectively.

The X-ray tube 6 is connected to a cut-off surface section 2 below the base plate 1.
It is suspended and supported at a height corresponding to .

On the other hand, the swinging plate 3 is provided with a swinging shaft 5 whose rear end is connected via a connecting member 7, and in the front-rear direction between the base 1 and the swinging board 3 above the swinging shaft 5, Vertically and swingably via two square bar-shaped link members 8 with connecting members 7 provided at both front and rear ends.
It is connected to the base 1.

A balance plate 14 made of a lead plate that also serves as an X-ray shield is attached to the back side of the film mounting surface 4 of the swing board 3, and the connecting member 7 connecting the base 1 and the swing shaft 5 is used as a fulcrum. The weight on the X-ray tube 6 side and the weight on the swing plate 3 side are balanced.

The distance between the supporting points of the two connecting members 7 that connect the swing shaft 5 and the base 1 and the rear end of the swing shaft 5 and the swing plate 3, and the connections provided at the front and rear ends of the two link members 8. The distances between the fulcrums of the members 7 are adjusted so that they have the same dimensions. Further, the link member 8 is made to have the same cross-sectional shape as the swing shaft 5.

On the other hand, the connecting members 7 are all of the same size and shape, and are attached to a pair of mounting ribs 12 provided on the rear surface of the base 1 or a pair of mounting ribs 13 provided on the front surface of the swing plate 3, respectively. They are connected.

As shown in FIG. 3, these connecting members 7 include a metal rectangular cylindrical connecting ring 15 having an inner diameter that swingably surrounds the link member 8, and both sides forming two opposing sides of the connecting ring 15. A pair of connecting pins 16 are provided on the wall and have their axes on the same line passing through the center point of the connecting ring 15, with their tips facing the inner diameter side, and a pair of connecting pins 16 that are provided on the wall and have their respective axes on the same line passing through the center point of the connecting ring 15, and a pair of connecting pins 16 that are provided on the wall and have their respective axes on the same line passing through the center point of the connecting ring 15. It is provided on a line orthogonal to each other at a point, and the tip is connected to a connecting ring 15.
It consists of a support pin 17 brought into contact with the outer surfaces of both walls forming two opposing sides of the support pin 17. Further, the connecting pin 16 and the support pin 17 are threaded pins with conically pointed tips, and the support pins 17 are respectively attached to female threads provided on the pair of mounting ribs 12 of the base 1. be. And connecting ring 1
5 is connected to the link member 8 by bringing the tips of the connecting pins 16 into contact with a pair of pin holes 18 provided in advance on both opposing outer surfaces of the link member 8, while the connecting ring 15 The base plate 1 is connected to the base plate 1 by bringing the tips of the pair of support pins 17 attached to the pair of mounting ribs 12 into contact with the pair of pin holes 19 previously provided on the outer surface of the base plate 1 .

Note that the pin hole 18 of the link member 8 and the connecting ring 15
The pin hole 19 has a smaller diameter than the connecting pin 16 and the support pin 17, and is designed to reduce the contact area with the conical tips of the connecting pin 16 and the support pin 17.
6 and support pin 17, tighten the locking nut 20 after setting.
It is fixed at.

That is, the connecting member 7 supports the link member 8 and the swing shaft 5 in a freely swinging manner via the connecting pin 16 and the support pin 17 arranged on two orthogonal axes on the same plane. These connecting members 7
This utilizes the functions and principles of a universal joint, but adds innovations to suppress swinging resistance and facilitate adjustment of the center of swing during installation.

In the tomography apparatus of this embodiment having the above configuration, when the front part of the swing shaft 5 is driven vertically and horizontally, the X-ray tube 6 held at the front end thereof
As shown by the arrows in Figures 1 and 2,
The swing plate 3 swings vertically and horizontally in an arc using the connecting member 7 that connects the swing shaft 5 and the base 1 as a fulcrum, while the swing plate 3 swings in the opposite direction to the front part of the swing shaft 5. It is directly driven by the movement of the rear end and swings in the opposite direction to the X-ray tube 6. At this time, each point of the film mounting surface section 4 below the swinging plate 3 also swings vertically and horizontally in an arc in the opposite direction to the front X-ray tube 6, as shown by arrows in the figure.

Further, the swinging plate 3 is connected to swing freely by two link members 8 and a swing shaft 5 whose distances between supporting points are equal, and these link members 8 and the swing shaft 5 are connected to each other. Since the shaft rotation is restrained, the shaft swings while maintaining verticality without causing any surface runout or twisting.

Furthermore, the weight on the X-ray tube 6 side, which uses the connecting member 7 between the base 1 and the swing shaft 5 as a fulcrum, and the weight on the swing plate 3 side are balanced, and the relatively heavy X-ray tube 6 is used as a fulcrum. Since they are located further down, they can be easily swung.

On the other hand, in FIGS. 1 and 2, reference numeral 9 denotes a swinging device, which is provided on the front surface of the base 1 and swings the swinging shaft 5.

This rocking device 9 will be explained with reference to FIG. 4, which is a front view thereof, and FIG. 5, which is a sectional view taken along line AA in FIG. 4.

In FIGS. 4 and 5, reference numeral 30 denotes a turning gear, which has a center hole and an annular recess 31 deeper than the tooth height in the center of the outer periphery in the face width direction. It is disposed on the front surface of the base 1, surrounding the rocking shaft 5, coaxially with the connecting member 7 connecting the rocking shaft 5 to the base 1, and the base 1 can be freely rotated via the support shaft 37. It is rotatably supported by three support wheels 36 whose outer peripheries are slidably inserted into the annular recess 31 of the turning gear 30.

Reference numeral 32 denotes a pair of swing angle adjusting plates. The swing angle adjusting plates 32 are provided on the front surface of the swing gear 30, and are opposed to each other in parallel with a space between them, with the center of rotation of the swing gear 30 in between. The rear end of each is connected to the front surface of the turning gear 30.

Further, a plurality of pin receiving recesses 33 are provided at the front end portions of these swing angle adjusting plates 32.

34 is a drive ring, and the drive ring 34 is freely slidable in the vertical direction on the outer periphery of the swing shaft 5 in front of the base 1.
It is a ring-shaped member that is freely rotatable, and is provided with a pair of pins 35 in opposite radial directions on its outer periphery.

38 is a drive gear, and the drive gear 38 is
It is disposed in contact with the outer periphery of the turning gear 30 and is connected to and supported by a motor 39 having a speed reduction mechanism attached to the base 1.

In the rocking device 9 of this embodiment, the drive ring 34
By sliding the pair of pins 35 back and forth as shown by the arrows in FIG. The inclination angle θ of the swing axis 5 with respect to the horizontal line passing through
The pitch can be arbitrarily selected from 5 degrees to 20 degrees.

According to the tomography apparatus of this embodiment having the above configuration, the relative movement between the X-ray tube 6 and the film mounting surface section 4 and the vertical maintenance of the film mounting surface section 4 allow the film mounting surface section 4 to be parallel to the base plate. 1 and the vertical plane passing through the center point of the connecting member 7 between the swing shaft 5, that is, the cut plane 21 shown by the dotted line in FIG. As shown by the chain line, the subject 22 placed on the cut surface section 2 is photographed with only the cross section located on the cut surface 21 being clearly photographed.

By setting various turning and swinging angles, it is possible to selectively take tomographic images of only the required parts of the subject 22.
By attaching a film for multilayer imaging to the camera, multilayer tomography can be performed at the same time.

Moreover, in the tomography apparatus of this embodiment,
X with the connecting member 7 between the base 1 and the swing shaft 5 as the fulcrum
Since the weights of the X-ray tube 6 side and the swing plate 3 side are balanced, and the relatively heavy X-ray tube 6 and film mounting surface section 4 are positioned below the fulcrum, it is impossible to force them to swing. You can do it without any problems.

Since the swing plate 3 is driven directly to the swing shaft 5 holding the X-ray tube 6, that is, via one axis and one fulcrum, the precision of the relative movement can be high, and the size can be reduced. It also becomes easier.

In this embodiment, the swing shaft 5 and the link member 8 are square bar-shaped with the same cross-sectional shape,
In addition, the connecting ring 15 of the connecting member 7 that connects these to the base 1 or the swing plate 3 is made into a rectangular tube shape, which provides rigidity against torsion and
In order to facilitate the indexing of these swing axes, the swing shaft 5 and the link member 8 are round rod-shaped, and the link ring 15 of the link member 7 is
may have a cylindrical shape, and instead of having the tips of the connecting pin 16 and the support pin 17 pointed conically, these tips may be provided with hard spheres.

Regarding the swinging of the swinging shaft 5, the structure of this embodiment may be used as long as it is possible to swing the X-ray tube 6 supported at the front of the upper part of the swinging shaft 5 so as to draw a desired trajectory. Instead of the rocking device 9, for example, a connecting rod or the like is provided at the front end of the rocking shaft 5, and this is manually rocked along the track groove of a pattern plate provided in the front of the device. Other means and devices may be used depending on size and configuration constraints.

Second Embodiment FIG. 6 is a side sectional view showing the main parts of a tomography apparatus according to a second embodiment of the present invention, and FIG.
-A sectional view.

It should be noted that the tomography apparatus of this embodiment has the same basic configuration as the above-described first embodiment except for the difference in the position of the cutting surface and the arrangement positions of the swing axis and the link member. Here, the description of the overlapping points will be omitted and only the differences will be briefly explained.

In FIGS. 6 and 7, reference numeral 101 denotes a base, and the base 101 has a window-shaped opening 102 cut out in a U-shape at its vertical center toward the side opposite to the pillar 10. provided, the window-like opening 10
2 is provided with a U-shaped truncated surface guide frame 102' whose longitudinal position coincides with the truncated surface 121 shown by the dotted line in the figure, and which is cut out on the side opposite to the support column 10.

103 is a swinging board, and the swinging board 103 is
A film mounting surface 104 is provided in the vertical center of the base 101 corresponding to the window-like opening 102 .

5 is a swing shaft, 6 is an X-ray tube, 7 is a connecting member, 8 is a link member, 9 is a swing device, and 11 is a support member, which are similar to those of the first embodiment described above. It is. However, in this embodiment, the swing shaft 5 is disposed so as to pass through the central part above the window-like opening 102 of the base 101, and is connected to the base 101, and swings the rear end thereof. It is connected to the upper end of the board 103. Further, two link members 8 are disposed on the lower end side of the base 101 and the swing plate 103, and both ends of each link member 8 are connected to the base 101 and the swing plate 103.
It is connected to.

Note that the swing shaft 5 and the link member 8 are swingably connected to the base 101 and the swing plate 103 via the connecting member 7, respectively, as in the first embodiment described above. The X-ray tube 6 is suspended and supported at a height position corresponding to the window-shaped opening 102 of the base 101.

In the tomography apparatus of this embodiment having the above configuration, the subject 122 is placed on the conveyance table 123 and sent into the window-shaped opening 102 from the opposite side of the column 10, as shown in FIG. , cutting surface guide frame 10
2' in the front-rear direction, and a predetermined cross section thereof is positioned on a cut surface 121 shown by a dotted line in FIG.

According to the tomography apparatus of this embodiment, the total height can be made relatively low, and it can be made more compact.
Since the connecting part between them is located at the top, it is easy to balance the weight between the X-ray tube 6 side and the swinging plate 103 side with this connecting part as a fulcrum, and the base 101 and the swinging board 101 are connected at both upper and lower ends. Since the movable plate 103 is connected to the moving plate 103, it is possible to more easily suppress blurring when the film mounting surface section 104 swings, thereby increasing the accuracy of tomography.

Third Embodiment FIG. 8 is a side sectional view showing the main parts of a tomography apparatus according to a third embodiment of the present invention, and FIG.
-A sectional view.

The tomography apparatus of this embodiment is different in that a spherical bearing is used as a connecting member between the swing shaft and the link member, and a member for preventing rotation of these shafts is arranged between the swing shaft and the link member. This embodiment is the same as the first embodiment described above except for the points mentioned above, and the description of the overlapping points will be omitted here, and only the different points will be briefly explained.

8 and 9, 1 is a base, 3 is a swing plate, 5 is a swing shaft, 8 is a link member, and 10 is a support, which are the same as those in the first embodiment described above. belongs to.

In this embodiment, the swing shaft 5 and the link member 8 are connected to the base 1 and the swing plate 3 via spherical bearings 40 and 41, respectively, instead of the connection member 7 of the first embodiment described above. There is.

A total of four link members 8 are disposed, two above the swing shaft 5 and two on both sides, and the swing shaft 5 and the link members 8 on both sides thereof are
A pair of link plates 42 arranged parallel to the swing plate 3
and a connecting pin 43, so that they can be rotated only on the same plane.

The distance between the fulcrums of the spherical bearings 41 at both ends of the link member 8 and the distance between the fulcrums of the spherical bearing 41 on the base 1 side of the swing shaft 5 and the spherical bearing 40 on the swing plate 3 side are as follows:
As in the first embodiment, they are of equal size.

In this embodiment, the rear end of the swing shaft 5 and both ends of the link member 8 are made smaller in diameter than the respective main bodies, and the spherical bearing 41 connecting these ends is connected to the swing shaft 5. It is smaller than the spherical bearing 40 that connects the bases 1.

According to the tomography apparatus of this embodiment having the above configuration, when the swing shaft 5 swings, the swing plate 3
It is possible to oscillate while maintaining verticality without causing surface runout or twisting, and it is also possible to reliably prevent the axial rotation of the oscillating shaft 5.

Incidentally, universal joints and spherical bearings are typical members having the function of swingably connecting or supporting shaft bodies, etc., and the above-mentioned first and second embodiments are A connecting member that utilizes the function and principle of a universal joint is used for the connecting portion between the moving shaft and the link member. On the other hand, in this embodiment, a spherical bearing is used as the connecting member.

However, since these spherical bearings also allow axial rotation of the shaft body they support, this embodiment is designed to prevent this axial rotation.

In addition, in the tomography apparatus according to the present invention described above, for the purpose of simplifying the configuration, the connecting members of the swing shaft and the link member are of the same type.
We chose the same size or the same kind/two sizes,
As long as these are configured to suppress the rotation of the rocking shaft 5 and prevent the surface runout and twisting of the rocking plate 3, the above-mentioned first The structure of the embodiment, universal joint,
A mixture of spherical bearings and the like can be used.

Furthermore, the tomography apparatus according to the present invention is not only suitable for local tomography of a human body for medical purposes, but also for internal inspection of electrical products, small devices, etc.

[Effect of idea]

As described above, the tomography apparatus according to the present invention is
The relative movement between the X-ray source and the film mounting surface is uniaxially controlled.
It can be performed with one fulcrum, the accuracy of the relative movement can be easily increased, and the configuration is simple.
In addition, many of the constituent members can be made compatible and have the same shape, making it possible to make the structure compact and to suppress the number of man-hours and cost required for its manufacture.

[Brief explanation of the drawing]

FIG. 1 is a side view with main parts cut away showing a tomography apparatus according to a first embodiment of the present invention, and FIG.
-A sectional view, FIG. 3 is a BB sectional view in FIG. 1, FIG. 4 is a front view of the rocking device according to the present invention, FIG. The figure is a side sectional view showing the main parts of the tomography apparatus according to the second embodiment of the present invention.
The figure is a sectional view taken along the line AA in FIG. 6, FIG. 8 is a side sectional view showing the main parts of a tomography apparatus according to the third embodiment of the present invention, and FIG. 9 is a sectional view taken along the line AA in FIG. 8. , FIG. 10 is a front view showing a conventional tomography apparatus, FIG. 11 is a side view of FIG. 10, FIG. 12 is a side view of a conventional tomography apparatus, and FIG. It is an A sectional view. DESCRIPTION OF SYMBOLS 1...Base, 2...Cut surface guide frame, 3...Swing plate, 4...Film attachment surface part, 5...Swing shaft, 6
... X-ray tube, 7 ... connection member, 8 ... link member, 9 ... rocking device, 10 ... support column.

Claims (1)

[Claims for Utility Model Registration] (1) A base disposed in the vertical direction, a swing shaft disposed through the base in the front-back direction, and a swing means for swinging the swing shaft. , an X-ray source suspended and supported from the front end of the swing shaft and whose height is below the bottom edge of the base, and a lower part located parallel to the base at the rear of the base and corresponding to the X-ray source. A tomography apparatus comprising a swinging plate having a film mounting surface on the front surface, wherein the swinging shaft is connected to the swinging plate at an intermediate portion near the rear end thereof, and to the swinging plate at the rear end thereof. , the swing plate is connected to the base via at least two link members and the swing shaft, and the link members and the swing shaft are two axes orthogonal to each other on the same plane in the vertical direction. A tomography apparatus characterized in that the tomography apparatus is swingably connected to a base and a swing plate through connection members that are rotatable with respect to each core. (2) A base that is arranged in the vertical direction and has a window-like opening that penetrates in the front-back direction in the middle part of the base in the vertical direction, and a base that penetrates above the window-like opening of the base in the front-back direction. a swinging shaft, a swinging means for swinging the swinging shaft, and an X-ray device suspended and supported by the front end of the swinging shaft, the height position of which corresponds to the window-like opening of the base. A tomography apparatus comprising: a source; and a swinging plate disposed behind the base in parallel with the base and having a film mounting surface on the front surface of a portion corresponding to a window-like opening of the base, the swinging plate comprising: The shaft is connected to the base at the intermediate portion near the rear end and to the swing plate at the rear end, and the swing plate is connected to the swing plate through at least two link members and the swing shaft. These link members and the swing shaft are connected to the base, and the link members and the swing shaft are connected to the base and the swing plate through connecting members that are rotatable about two axes that are perpendicular to each other on the same plane in the vertical direction. A tomography apparatus characterized in that the tomography apparatus is capable of being connected to each other.