Title:
CONCRETE PLACING OPENING
Document Type and Number:
Japanese Patent JP2713693
Kind Code:
B2
Abstract:
PURPOSE: To provide a concrete placing opening not taking much space even in a narrow center and facilitating maintenance such as water washing.
CONSTITUTION: A connecting port 6 is opened in the peripheral wall of a guide pipe 3, and a concrete feed cylinder 7 is fitted to the connecting port 6. A connecting port 8 communicated with the connecting port 6 at the time of protruding a movable pipe 4 outside of a filling hole 2 and closed at the time of pulling the movable pipe 4 inside the filling port 2 is formed at the peripheral wall of the movable pipe 4. A bottom part 9 for receiving ready-mixed concrete fed into the movable pipe 4 from the concrete feed cylinder 7 through the connecting ports 6, 8 is provided inside the movable pipe 4. The tip opening part 5 of the movable pipe 4 is so formed as to be opened to the outside being communicated with the concrete feed cylinder 7 of the guide pipe 3 when the movable pipe 4 is pulled into the guide pipe 3. The bottom part 9 of the movable pipe 4 is formed to be inclined downward toward the connecting port 8 from the opposite side to the connecting port 8 of the movable pipe 4.
Inventors:
Mio Saga
Application Number:
JP33446294A
Publication Date:
February 16, 1998
Filing Date:
December 19, 1994
Export Citation:
Assignee:
Saga Industry Co., Ltd.
International Classes:
E21D11/10; B28B13/00; E04G21/02; (IPC1-7): E21D11/10; B28B13/00; E04G21/02
Domestic Patent References:
| JP5775097U |
Attorney, Agent or Firm:
Shoji Kobayashi