JPH02149932U - - Google Patents
Info
- Publication number
- JPH02149932U JPH02149932U JP1989058697U JP5869789U JPH02149932U JP H02149932 U JPH02149932 U JP H02149932U JP 1989058697 U JP1989058697 U JP 1989058697U JP 5869789 U JP5869789 U JP 5869789U JP H02149932 U JPH02149932 U JP H02149932U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- width
- chain
- center
- curtain
- 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
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図は可変巾スクリーンの横断面図、第２図
は可変巾スクリーンの部分縦断面図、第３図は第
１図の中央部を拡大した部分図、第４図は第２図
の上部中央部を拡大した部分図である。
１……スクリーン、２……フレーム、３……取
り付け具、４，４′……チエーン歯車、５，５′
……軸、６，６′……平歯車、７，７′……傘歯
車、８……モーター、１０，１０′……チエーン
、１１，１１′……幕、１２，１２′……幕取り
付け具。
Figure 1 is a cross-sectional view of the variable width screen, Figure 2 is a partial vertical cross-sectional view of the variable width screen, Figure 3 is an enlarged partial view of the center of Figure 1, and Figure 4 is the upper part of Figure 2. FIG. 3 is a partial enlarged view of the central part. 1...screen, 2...frame, 3...attachment, 4,4'...chain gear, 5,5'
...shaft, 6, 6'... spur gear, 7, 7'... bevel gear, 8... motor, 10, 10'... chain, 11, 11'... curtain, 12, 12'... curtain Fittings.
Claims (1)
にして、スクリーンと直交する平面を、スクリー
ンに沿つて互いに反対方向に同じ早さで回動する
チエーンを設け、上下のチエーン間にチエーンの
全長のほぼ２分の１の巾の幕を、その端部がスク
リーン前部中央で一致する様に保持し、この位置
より幕が開く範囲でチエーンの回動を制御するこ
とにより、有効なスクリーン巾を任意に設定しう
る可変巾スクリーン。 Chains are provided above and below the screen that rotate at the same speed in opposite directions along the screen on a plane orthogonal to the screen, with the center of the screen as the boundary, and approximately the entire length of the chain is provided between the upper and lower chains. By holding a half-width curtain so that its ends align with the center of the front of the screen, and controlling the rotation of the chain within the range in which the curtain opens from this position, the effective screen width can be adjusted to any desired width. Variable width screen that can be set to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989058697U JPH02149932U (en) | 1989-05-23 | 1989-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989058697U JPH02149932U (en) | 1989-05-23 | 1989-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02149932U true JPH02149932U (en) | 1990-12-21 |
Family
ID=31584544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989058697U Pending JPH02149932U (en) | 1989-05-23 | 1989-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149932U (en) |
-
1989
- 1989-05-23 JP JP1989058697U patent/JPH02149932U/ja active Pending
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