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US 6,378,594 B1Granted
Roll screen
AssigneeKabushiki Kaisha Nichibei
InventorsHiroomi Yamanaka, Ken-ichiro Egami, Masayuki Akimoto
Life of this patent
Estimating the term…
Abstract
A roll screen comprises side plates, a winding pipe rotatably supported on the side plates, a spring mounted in the winding pipe, a screen to be wound on the winding pipe by the accumulated force of the spring, and a brake mounted in the winding pipe for decreasing a winding speed of the screen from a final stage of the winding of the screen. The clutch case is engaged with the brake from a final stage of the winding of the screen, and the brake is operated so that the winding speed of the screen can be decreased.
Claims16
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a roll screen to be wound on said winding pipe by the accumulated force of said spring;
- a decreasing mechanism mounted in said winding pipe, said decreasing mechanism comprising:
- a section that decreases a winding speed of said roll screen from a final stage of a winding of said roll screen prior to said roll screen being completely wound up;
- and
- an operating mechanism that determines the screen being in the final stage based on the rotation of the winding pipe, and for operating said section in the final stage.
5 more elements
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a screen to be wound on said winding pipe by the accumulated force of said spring;
- a decreasing mechanism mounted in said winding pipe for decreasing a winding speed of said screen prior to a final stage of a winding of said screen
- said mechanism comprising:
- a section that further decreases the winding speed of said screen in the final stage;
- and
- an operating mechanism that determines the screen being in the final stage based on the rotation of the winding pipe, and for operating said section in the final stage.
6 more elements
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a screen to be wound on said winding pipe by the accumulated force of said spring;
- a decreasing mechanism mounted in said winding pipe for decreasing a winding speed of said screen during a winding of said screen
- said mechanism comprising:
- a section that further decreases the winding speed of said screen in the final stage;
- and
- an operating mechanism that determines the screen being in the final stage based on the rotation of the winding pipe, and for operating said section in the final stage.
6 more elements
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a screen to be wound on said winding pipe by the accumulated force of said spring;
- a mechanism for decreasing a winding speed of said screen from prior to a final stage of a winding of said screen, said mechanism comprising:
- a section that further decreases the winding speed of said screen in the final stage, and
- an operating mechanism that determines the screen being in the final stage based on the rotation of the winding pipe, and for operating said section in the final stage to further decrease the winding speed of said screen.
4 more elements
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a screen to be wound on said winding pipe by the accumulated force of said spring;
- and
- a decreasing assembly mounted in said winding pipe for decreasing a winding speed of said screen from a final stage of a winding of said screen, said decreasing assembly comprising:
- a screw shaft fixedly supported on the side plate;
- a clutch case which is mounted in the winding pipe so as to be movable in the axial direction but unrotatable relative to the winding pipe and which can be moved along the screw shaft together with a rotating of the winding pipe;
- and
- a brake section which is disposed on an end side of the screw shaft and which has a rotary brake, wherein the clutch case is engaged with the brake section, the brake section is operated.
7 more elements
A roll screen assembly comprising:
- side plates;
- a winding pipe rotatably supported on said side plates;
- a spring mounted in said winding pipe;
- a screen to be wound on said winding pipe by the accumulated force of said spring;
- a decreasing assembly mounted in said winding pipe for decreasing a winding speed of said screen from a final stage of a winding of said screen, said decreasing assembly comprising:
- a screw shaft fixedly supported on the side plate;
- a clutch case which is mounted in the winding pipe so as to be movable in the axial direction but unrotatable relative to the winding pipe and which can be moved along the screw shaft together with rotating of the winding pipe;
- and
- a brake section which is disposed on an end side of the screw shaft;
- and
- a positioning mechanism for positioning the clutch case in an axial direction relative to the winding pipe when the screen is completely wound.
8 more elements
Dependencies are inferred from the claim text.