JPH0331286Y2 - - Google Patents
Info
- Publication number
- JPH0331286Y2 JPH0331286Y2 JP1983065833U JP6583383U JPH0331286Y2 JP H0331286 Y2 JPH0331286 Y2 JP H0331286Y2 JP 1983065833 U JP1983065833 U JP 1983065833U JP 6583383 U JP6583383 U JP 6583383U JP H0331286 Y2 JPH0331286 Y2 JP H0331286Y2
- Authority
- JP
- Japan
- Prior art keywords
- top plate
- rolling
- pinion
- guide groove
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Apparatus For Radiation Diagnosis (AREA)
Description
【考案の詳細な説明】 (イ) 産業上の利用分野 本考案は、Ｘ線透視台の分野で利用される。[Detailed explanation of the idea] (b) Industrial application fields The present invention is used in the field of X-ray fluoroscopy tables.
本考案は、Ｘ線透視台として利用されるローリ
ング天板装置に関する。 The present invention relates to a rolling top plate device used as an X-ray fluoroscopy table.
(ロ) 従来技術
胃部位の透視撮影において、斜位置の撮影が必
要とされ、従来より、横断面が円弧状のローリン
グ天板が用いられている。この場合、第１図に示
すように、円弧状天板６におけるＸ線焦点の線上
（図示一点鎖線）に求めた点Ｐを中心にローリン
グさせている。しかしながら、この方法によれ
ば、ローリング時に、天板６の最下面部が下降
し、受像系（図示ではハツチング部分）と干渉す
る恐れがあるため、あらかじめ天板６と受像系と
の間隔ｄを大きくとつている。なお、第１図で
は、左側が天板６の水平時を、右側にはそのロー
リング時を、それぞれ示している。(B) Prior Art In fluoroscopic imaging of the stomach region, imaging from an oblique position is required, and conventionally, a rolling top plate with an arcuate cross section has been used. In this case, as shown in FIG. 1, rolling is performed around a point P determined on the line of the X-ray focal point (dotted chain line in the figure) on the arcuate top plate 6. However, according to this method, there is a risk that the lowest surface of the top plate 6 will descend during rolling and interfere with the image receiving system (the hatched part in the figure), so the distance d between the top plate 6 and the image receiving system is determined in advance. It's getting bigger. In FIG. 1, the left side shows the top plate 6 when it is horizontal, and the right side shows the top plate 6 when it is rolling.
このように間隔ｄが大きいと、被検部位が拡大
透視され、読影上好ましくない。 If the interval d is large in this way, the region to be examined will be seen in an enlarged manner, which is not preferable for image interpretation.
(ハ) 目的
本考案の目的は、天板の水平時と同様に、その
ローリング時においても天板の最下面部と受像系
との間隔が少くとも最小限の変化に押さえ、ロー
リングした天板の最下面部が受像系と干渉するこ
とがない、ローリング天板装置を提供することで
ある。この目的に沿つた動作態様が第２図に示さ
れる。(C) Purpose The purpose of this invention is to minimize the change in the distance between the lowest surface of the top and the image receiving system when the top is rolling, as well as when the top is horizontal, so that the rolling top To provide a rolling top plate device in which the lowest surface part of the top plate does not interfere with an image receiving system. A mode of operation for this purpose is shown in FIG.
(ニ) 構成
前記の目的は、天板と、これを架持するガイド
板と、ベアリング軸を嵌着し、ピニオン軸を回動
可能に嵌挿させたスタンドとからなり、ガイド板
はその下端水平面にピニオンと噛み合うラツク部
を、またその腹部には固定されたベアリングの嵌
合案内溝を有し、その軸線は、天板のローリング
が行なわれたときに、該ベアリングの固定軸が移
動して描くであろうと計算される軌道に一致し
て、案内溝を造形することにより達成される。(d) Structure The above object consists of a top plate, a guide plate that supports the top plate, and a stand into which a bearing shaft is fitted and a pinion shaft is rotatably fitted, and the guide plate is attached to the lower end of the stand. It has a rack part on the horizontal surface that engages with the pinion, and a fitting guide groove for a fixed bearing on its abdomen, and its axis is such that the fixed shaft of the bearing moves when the top plate is rolled. This is achieved by shaping the guide grooves in accordance with the calculated trajectory that will be drawn.
(ホ) 実施例
本考案の好適な実施例は、第３図以下について
説明される。(E) Embodiment A preferred embodiment of the present invention will be explained with reference to FIG. 3 and subsequent figures.
第３図は、本考案の１実施例を示す正面図、第
４図はその側面図、第５図は、その実施例のロー
リング動作例説明図である。 FIG. 3 is a front view showing an embodiment of the present invention, FIG. 4 is a side view thereof, and FIG. 5 is an explanatory diagram of an example of rolling operation of the embodiment.
６は天板である。１は天板６を架持するガイド
板である。７はスタンドであり、上方には、ベア
リング３を固定させた軸が不動に接続され、下方
にはピニオン５を有する軸が回動可能に支持され
ている。ガイド板１は、スタンド７と対向して、
相応する位置に、ベアリング３の嵌合案内溝２
と、ピニオン５と噛み合うラツク部４をそれぞれ
具有している。 6 is a top plate. Reference numeral 1 denotes a guide plate that supports the top plate 6. Reference numeral 7 denotes a stand, to the upper part of which a shaft to which a bearing 3 is fixed is fixedly connected, and to the lower part a shaft having a pinion 5 is rotatably supported. The guide plate 1 faces the stand 7,
Insert the fitting guide groove 2 of the bearing 3 into the corresponding position.
and a rack portion 4 that meshes with the pinion 5.
このような構成で、ピニオン５に回転を与える
と、ラツク部４は一方向に移動すると共に、案内
溝２は支持点ないしベアリング軸３により拘束さ
れ、ガイド板１および天板６は、第５図に示すよ
うに、ローリング運動を行なう。 With this configuration, when the pinion 5 is rotated, the rack part 4 moves in one direction, the guide groove 2 is restrained by the support point or the bearing shaft 3, and the guide plate 1 and the top plate 6 move in the fifth direction. Perform a rolling motion as shown.
本考案によれば、案内溝２は、その軸線を、天
板のローリングが行なわれたときに、ベアリング
３の固定軸が移動して描くであろうと計算される
軌道に一致して、造形される。この軌道の求め方
が、第６図以下について説明される。第６図は、
各係数値を図示により規定しており、Ｒは曲面天
板６の裏面の半径、ａは天板上のある固定点と天
板６の最下面底との距離、ｋはその最下面底とピ
ニオン５の中点間距離、ｃとｂは支持点ないしベ
アリング３の軸心におけるｘ、ｙ座標値である。 According to the present invention, the guide groove 2 is shaped so that its axis coincides with the calculated trajectory that the fixed shaft of the bearing 3 will move when the top plate is rolled. Ru. How to obtain this trajectory will be explained with reference to FIG. 6 and subsequent figures. Figure 6 shows
Each coefficient value is specified by illustration, where R is the radius of the back surface of the curved top plate 6, a is the distance between a certain fixed point on the top plate and the bottom of the bottom surface of the top plate 6, and k is the bottom of the bottom surface. The distance between the center points of the pinion 5, c and b, are the x and y coordinate values at the support point or the axis of the bearing 3.
そこで、天板６の水平時におけるＹ軸がローリ
ングにより角度θだけ移動したＹ軸（Yθ）につ
いて、支持点の座標は、第７図により、
Xθ＝＋
＝（ａ＋ｋ／cosθ−ｂ）sinθ＋Ccosθ
Yθ＝Csinθ＋bcosθ
により得られる。この関係式により、天板裏面が
ローリングするに従つて変位するが、変位量があ
る一定値内になるような諸係数値を決める。これ
らの数値を用いてXθ、Yθを計算し、座標軸上に
表示すれば、第８図のような曲線が得られる。こ
れが目的とする軌道となる。 Therefore, regarding the Y-axis (Yθ) where the Y-axis when the top plate 6 is horizontal has moved by an angle θ due to rolling, the coordinates of the support point are as follows from FIG. It is obtained by =Csinθ+bcosθ. Based on this relational expression, various coefficient values are determined so that the back surface of the top plate is displaced as it rolls, but the amount of displacement is within a certain value. If Xθ and Yθ are calculated using these values and displayed on the coordinate axes, a curve as shown in FIG. 8 will be obtained. This is the desired trajectory.
(ヘ) 効果
本考案は、天板のローリング位置においても、
その水平位置と比較して、被検体部の拡大率がほ
ぼ一定で、診断上必要な部位が完全に受像画面に
映り、またその画質もよくなり、さらに構成にお
いて部品点数が少なく簡素で製作し易いという効
果を奏する。(f) Effects This invention also has the effect of
Compared to its horizontal position, the magnification rate of the object part is almost constant, the parts necessary for diagnosis are completely reflected on the image receiving screen, the image quality is also good, and the structure has fewer parts and is simple to manufacture. It has the effect of being easy.
第１図は公知例の動作態様図、第２図は本考案
による動作態様図、第３図は本考案の一実施例を
示した正面図、第４図はその側面図、第５図はそ
の動作例態様図、第６図から第８図は本考案によ
る案内溝の軸線軌道を求めるための図示説明図で
ある。
１はガイド板、２はベアリング案内溝、３はベ
アリング、４はラツク部、５はピニオン、６は天
板、７はスタンドである。
FIG. 1 is a diagram of the operation mode of a known example, FIG. 2 is a diagram of the operation mode of the present invention, FIG. 3 is a front view showing an embodiment of the present invention, FIG. 4 is a side view thereof, and FIG. 5 is a diagram of the operation mode of the known example. FIGS. 6 to 8 are explanatory drawings for determining the axial trajectory of the guide groove according to the present invention. 1 is a guide plate, 2 is a bearing guide groove, 3 is a bearing, 4 is a rack part, 5 is a pinion, 6 is a top plate, and 7 is a stand.
Claims (1)
グ軸を固定させ、またピニオン軸を回動可能に嵌
挿させたスタンドとからなり、ガイド板はその下
端水平面にピニオンと噛み合うラツク部を、また
その腹部には固定されたベアリングの嵌合案内溝
を有し、この案内溝は、天板のローリングが行な
われたときに、その天板の最下面部とＸ線受像系
とが干渉しないよう略湾曲上に形成されているこ
とを特徴とする、Ｘ線透視台のローリング天板装
置。 It consists of a top plate, a guide plate that supports the top plate, and a stand that fixes the bearing shaft and rotatably inserts the pinion shaft.The guide plate has a rack part on its lower horizontal surface that engages with the pinion. In addition, the abdomen has a fixed bearing fitting guide groove, and this guide groove prevents interference between the lowest surface of the top plate and the X-ray image receiving system when the top plate is rolled. A rolling top plate device for an X-ray fluoroscopy table, characterized in that it is formed on a substantially curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6583383U JPS59169808U (en) | 1983-04-30 | 1983-04-30 | Rolling top plate device for X-ray fluoroscopy table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6583383U JPS59169808U (en) | 1983-04-30 | 1983-04-30 | Rolling top plate device for X-ray fluoroscopy table |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59169808U JPS59169808U (en) | 1984-11-13 |
| JPH0331286Y2 true JPH0331286Y2 (en) | 1991-07-03 |
Family
ID=30196045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6583383U Granted JPS59169808U (en) | 1983-04-30 | 1983-04-30 | Rolling top plate device for X-ray fluoroscopy table |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59169808U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63240839A (en) * | 1987-03-30 | 1988-10-06 | 株式会社東芝 | Bed apparatus for diagnostic apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50120377U (en) * | 1974-03-15 | 1975-10-01 |
-
1983
- 1983-04-30 JP JP6583383U patent/JPS59169808U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59169808U (en) | 1984-11-13 |
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