METHOD AND DEVICE OF PLACING CONCRETE BY AUTOMATICALLY SENSING CONCRETE TOP END POSITION

Japanese Patent JPH02266064

A

PURPOSE: To prevent malfunction of a device by a method wherein a signal from a ready-mixed concrete top end position sensor mounted to forms is received, and after the signal is confirmed, a forms vibrator is actuated to compact concrete.

CONSTITUTION: A concrete-filled portion sensor 10 having a sensing part and a signal transmission part is mounted to forms. A form vibrator switch case 70 with a control circuit to receive a signal from the sensor 10 and confirm the signal and designed not to work by receipt of a sensing signal for a short time is provided. Further, a forms vibrator 50 actuated by means of a control signal is mounted to the forms. After the top end position of ready-mixed concrete in the forms is accurately sensed, the forms vibrator is actuated. This constitution enables prevention of malfunction of the vibrator.

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HARIGAYA TORU
SUGIMOTO KOICHI
SUZUKI YOSHIKAZU
OTSUBO YUKIHIRO

JP8469589A

October 30, 1990

April 05, 1989

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HAYASHI BAIBUREETAA KK
OHBAYASHI CORP

E04G21/02; E04G21/06; (IPC1-7): E04G21/02; E04G21/06

JPS6447481A	1989-02-21
JPS60164555A	1985-08-27
JPS62185962A	1987-08-14
JPS6073961A	1985-04-26

Shinnosuke Tsunoda

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