JPH0453600U - - Google Patents
Info
- Publication number
- JPH0453600U JPH0453600U JP9609690U JP9609690U JPH0453600U JP H0453600 U JPH0453600 U JP H0453600U JP 9609690 U JP9609690 U JP 9609690U JP 9609690 U JP9609690 U JP 9609690U JP H0453600 U JPH0453600 U JP H0453600U
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- block
- movement
- diaphragm
- prevention device
- 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.)
- Pending
Links
- 230000002265 prevention Effects 0.000 claims description 7
- 238000001959 radiotherapy Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Radiation-Therapy Devices (AREA)
Description
第１図及び第２図は本考案の衝突防止装置を適
用した放射線治療装置における絞り機構を示す概
略正面図及び概略斜視図、第３図ａ及びｂは衝突
防止装置の第一の実施例を示すスイツチ部の通常
状態の拡大説明図及びスイツチ部の切り替え状態
の拡大説明図、第４図ａ及びｂは移動範囲限界手
段を有する衝突防止装置の第二の実施例を示す通
常状態の説明図及び限界位置状態の説明図、第５
図及び第６図は衝突防止装置の他の例を示すスイ
ツチ部の通常状態の説明図及びスイツチ部の切り
替え状態の説明図、第７図ａ及びｂは従来の衝突
防止装置の一例を示す説明用正面図及び説明用側
面図、第８図は従来の衝突防止装置の他の例を示
す説明用正面図である。
１１，１２……絞りブロツク、２１，２２……
ワイヤ、２５，２６……カム、３０……スイツチ
部、３１……スイツチ、３２……突起、４１，４
２……ワイヤ、４３，４４……カム、４５，４７
……引張ばね、４８……スイツチ、４９……突起
。
1 and 2 are a schematic front view and a schematic perspective view showing an aperture mechanism in a radiation therapy apparatus to which the collision prevention device of the present invention is applied, and FIGS. 3 a and 3 b show a first embodiment of the collision prevention device. FIGS. 4A and 4B are enlarged explanatory views of the normal state of the switch section and enlarged explanatory views of the switched state of the switch section, and FIGS. and an explanatory diagram of the limit position state, 5th
6 and 6 are explanatory diagrams of the normal state of the switch section and explanatory diagrams of the switching state of the switch section showing another example of the collision prevention device, and FIGS. 7a and 7b are explanatory diagrams showing an example of the conventional collision prevention device. FIG. 8 is an explanatory front view showing another example of a conventional collision prevention device. 11, 12... Aperture block, 21, 22...
Wire, 25, 26...Cam, 30...Switch part, 31...Switch, 32...Protrusion, 41, 4
2... Wire, 43, 44... Cam, 45, 47
...Tension spring, 48...Switch, 49...Protrusion.
Claims (1)
動経路上で互いに接触する位置と接近する位置と
の何れか一方の停止指令位置まで移動したとき、
絞りブロツクの移動を停止させてなる放射治療装
置における絞り機構の衝突防止装置において、 各絞りブロツク内側端面を除く位置に夫々連結
された連結部材と、各絞りブロツクの移動に伴う
連結部材の張力の変化に応じ相対的に変化可能で
あつて、かつ双方の絞りブロツクが前記停止指令
位置まで移動した時点で特定位置に変化する変位
部材と、該変位部材に設け、かつ変位部材が特定
位置に変位した時点で切り替わり、絞りブロツク
の移動を停止させるスイツチ部とを有することを
特徴とする放射線治療装置における絞り機構の衝
突防止装置。[Claims for Utility Model Registration] When both opposing aperture blocks of the aperture mechanism move to a stop command position that is either a position where they come into contact with each other or a position where they approach each other on the movement path,
In a collision prevention device for an aperture mechanism in a radiation therapy apparatus in which movement of an aperture block is stopped, there are connecting members connected to positions other than the inner end faces of each aperture block, and tension in the connecting members caused by movement of each aperture block. a displacement member that can be relatively changed in accordance with the change and that changes to a specific position when both aperture blocks move to the stop command position; 1. A collision prevention device for a diaphragm mechanism in a radiotherapy apparatus, comprising a switch section that switches when the diaphragm block moves and stops the movement of the diaphragm block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9609690U JPH0453600U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9609690U JPH0453600U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0453600U true JPH0453600U (en) | 1992-05-07 |
Family
ID=31835361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9609690U Pending JPH0453600U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453600U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013017500A (en) * | 2011-07-07 | 2013-01-31 | Mitsubishi Electric Corp | Scattering-body switching device and particle beam treatment apparatus |
-
1990
- 1990-09-14 JP JP9609690U patent/JPH0453600U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013017500A (en) * | 2011-07-07 | 2013-01-31 | Mitsubishi Electric Corp | Scattering-body switching device and particle beam treatment apparatus |
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