JPS56416A - Automatic fall device for rubber dam - Google Patents
Automatic fall device for rubber damInfo
- Publication number
- JPS56416A JPS56416A JP11472479A JP11472479A JPS56416A JP S56416 A JPS56416 A JP S56416A JP 11472479 A JP11472479 A JP 11472479A JP 11472479 A JP11472479 A JP 11472479A JP S56416 A JPS56416 A JP S56416A
- Authority
- JP
- Japan
- Prior art keywords
- rubber dam
- float
- water
- lever
- air
- 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.)
- Granted
Links
Landscapes
- Barrages (AREA)
Abstract
PURPOSE: To keep a constant inner pressure in the rubber dam and facilitate both a falling and a raise of the rubber dam when water volume is increased by a method wherein a bell crank lever for controlling a discharge of the fluid from a fluid discharge pipe is engaged with an engagement lever connected to the float.
CONSTITUTION: When the water volume is increased, the water is flowed into the float chamber 21. When a water level in a riber is reached up to a desired level, the float 17 is raised up, a movement of the float 17 made by its own weight acting upon the engagement lever 13 is gradually decreased, and the lever 13 is rotated around a fulcrum point 14 in a direction indicated by the arrow B. Thereby, the bell crank lever 12 is released from its restricted condition, rotated in a direction indicated by arrow A under an action of the weight 12a. As a result, a discharge of the air from the bulge-out rubber dam 2 shown by a phantam-line under a feeding of air from the air feeding means 8 is started. This discharging action is continued until the rubber dam 2 is completely fallen by water pressure in the river. Leakage of inner pressure in the rubber dam 2 is effectively prevented by the mechanism discribed above.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11472479A JPS56416A (en) | 1979-09-08 | 1979-09-08 | Automatic fall device for rubber dam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11472479A JPS56416A (en) | 1979-09-08 | 1979-09-08 | Automatic fall device for rubber dam |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7486779A Division JPS56413A (en) | 1979-06-14 | 1979-06-14 | Discharging method and apparatus for multilayer rubber dam |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56416A true JPS56416A (en) | 1981-01-06 |
JPS5734407B2 JPS5734407B2 (en) | 1982-07-22 |
Family
ID=14645027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11472479A Granted JPS56416A (en) | 1979-09-08 | 1979-09-08 | Automatic fall device for rubber dam |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56416A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801106A (en) * | 1986-11-04 | 1989-01-31 | Kabushiki Kaisha Kobe Seiko Sho | Coil of tapered wire |
-
1979
- 1979-09-08 JP JP11472479A patent/JPS56416A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801106A (en) * | 1986-11-04 | 1989-01-31 | Kabushiki Kaisha Kobe Seiko Sho | Coil of tapered wire |
Also Published As
Publication number | Publication date |
---|---|
JPS5734407B2 (en) | 1982-07-22 |
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