Soil improvement agent supply apparatus

A soil improvement agent supply apparatus for adding a soil improvement agent to soil, the apparatus comprising:

• a storage tank for storing the soil improvement agent;
• a feeder placed beneath the storage tank to add the soil improvement agent in the storage tank to the soil;
• a stirring device placed in the storage tank to stir the soil improvement agent in the storage tank;
• a control device for controlling the feeder and the stirring device;
• and
• an operating unit for manipulating the drive speed of the feeder;
• wherein the control device includes
• a memory unit for storing the relationship between drive speed command values for the feeder and the stirring device,
• a command section which, in accordance with a signal from the operating unit and information stored in the memory unit, increases the speed command value for the stirring device when the speed command value for the feeder increases and decreases the speed command value for the stirring device when the speed command value for the feeder decreases, and
• an output section for outputting the command values generated in the command section to the feeder and the stirring device.

A soil improvement agent supply apparatus for adding a soil improvement agent to soil, the apparatus comprising:

• a storage tank for storing the soil improvement agent;
• a feeder placed beneath the storage tank to add the soil improvement agent in the storage tank to the soil;
• a stirring device placed in the storage tank to stir the soil improvement agent in the storage tank;
• a speed detector for detecting the drive speed of the feeder;
• and
• a control device for controlling the feeder and the stirring device;
• wherein the control device includes
• an input section for inputting a signal from the speed detector,
• a memory unit for storing the relationship between the drive speed of the feeder and the drive speed of the stirring device,
• a command section which, in accordance with a signal from the speed detector and information stored in the memory unit, increases a speed command value for the stirring device when the drive speed of the feeder increases and decreases the speed command value for the stirring device when the drive speed of the feeder decreases, and
• an output section for outputting a command value generated in the command section to the stirring device.

A soil improvement agent supply apparatus for adding a soil improvement agent to soil, the apparatus comprising:

• a storage tank for storing the soil improvement agent;
• a feeder placed beneath the storage tank to add the soil improvement agent in the storage tank to the soil;
• a stirring device placed in the storage tank to stir the soil improvement agent in the storage tank;
• a load detector for detecting the drive load on the feeder;
• and
• a control device for controlling the feeder and the stirring device;
• wherein the control device includes
• an input section for inputting a signal from the load detector,
• a memory unit for storing a preselected threshold value for the drive load on the feeder,
• a command section which generates a predefined speed command value for the stirring device when the feeder drive load computed in accordance with a signal from the load detector is lower than the threshold value and reduces the speed command value for the stirring device to zero when the feeder drive load is not lower than the threshold value, and
• an output section for outputting a command value generated in the command section to the stirring device.