JP2000017651A - Agitating and mixing device for ground improvement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent turning together and contrive uniform soil improvement of high quality by providing a first agitating unit and a second agitating unit in parallel, driving each drive sprocket by a separate hydraulic motor and driving each agitating chain with fins in mutually reverse directions. SOLUTION: Respective rotation directions and rotation speeds of hydraulic motors 8, 9 can be separately arbitrarily varied. Chains with fins 20, 21 are driven in reverse directions to deliver and move clod between both units A, B. Furthermore, agitating fins 22, 23 withdraw a solidifying agent scattered on a ground surface into a ground, and agitating and mixing are performed so as to transmit it to the other unit side. In this case, since scattering is prevented during and after spraying of the solidifying agent such as a cement powder by strong wind, the whole device 3 is covered by a bellows expansion and contraction skirt bringing a lower edge opening end into contact with a ground surface. Thus, the agitating and mixing device 3 can be shallowly or deeply inserted into soil, delivery and movement of clod are performed between a plurality of units to be fined and uniform mixing by agitation of the solidifying agent can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trencher-type ground improvement stirring and mixing apparatus having a plurality of parallel chains.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 8-144262 discloses an apparatus in which a solidifying agent in the form of powder or slurry is sprayed on the surface of the ground or injected into the soil and stirred and mixed with the soil. In this device, since the two chains with stirring blades are driven by a common rotary drive shaft, the rotation of the drive motor always rotates at the same speed and in the same direction regardless of the direction of rotation. Cause a co-rotational phenomenon, causing them to simply move in the soil, failing to obtain a uniform mixing and stirring effect.

[0003]

SUMMARY OF THE INVENTION In the present invention, the agitated soil moves up and down and left and right before and after the apparatus without causing co-rotation, and the soil mass is finely divided and uniformly mixed with the solidifying agent. Another object of the present invention is to provide a device capable of efficiently providing a stable and high quality improved soil.

[0004]

The apparatus of the present invention is wound around a track frame with a driven sprocket, a driving sprocket, and both sprockets, which are extended downward and fixed between both side plates of a portal frame attached to the tip of a work vehicle arm. The first and second stirring units consisting of a chain with stirring blades
The drive sprockets, which are arranged in two rows and constitute each of the units, are connected so as to be driven by separate hydraulic motors fixed to the portal frame, and the first and second drive sprockets are connected to each other. The chain with stirring blades of the stirring unit is driven in the opposite direction at the same speed or at different speeds.
Further, a third stirring unit is provided in the middle of the first and second stirring units, and these units are individually driven, or
1. The driving unit is configured such that the driving sprocket of the second stirring unit is driven by a common driving source and the third stirring unit is connected to a separate driving source.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a working vehicle such as an excavator, 2 is an arm, and 3 is a stirring and mixing device attached to the end of the arm. The stirring and mixing device is as shown in FIG. 2 and below, wherein 4 is a portal main frame, 5 is an upper frame, and 6 and 7 are side plates. Reference numerals 8 and 9 denote hydraulic motors having drive sprockets 10 and 11 mounted on the outer periphery of the drum, which are fixed to the inner surfaces of the frame side plates 6 and 7, respectively. 12, 13 are horizontal bars installed between both side plates, 1
Reference numerals 4 and 15 denote track frames which are located on the rotating surfaces of the driving sprockets 10 and 11 and are fixed to the horizontal rods. Reference numerals 18 and 19 are bifurcated support members. 20 and 21 are chains wound around each sprocket, and large and small stirring blades 22 and 23 are fixed on the outer surface side. Reference numerals 24 and 25 denote auxiliary sprockets for extending a chain, which are fixed to one intermediate surface of the track frame.

[0006] A set of a drive sprocket, a track frame, a driven sprocket, and a chain with stirring blades is abbreviated as a stirring unit. That is, the above-described apparatus includes first and second stirring units A,
B is fixedly provided in pairs in the portal main frame, and each drive sprocket is configured to be driven by a separate drive source.

[0007] The hydraulic motors 8 and 9 as drive sources can independently and arbitrarily change the respective rotation directions and rotation speeds. For example, if the chains 20 and 21 are driven in the opposite direction,
As shown in Fig. 4, the transfer of the earth mass is performed between the two units as indicated by the dotted line, and the stirring blades 22 and 23 draw the solidifying agent (not shown) sprayed on the surface of the ground into the other unit while pulling it into the soil. Stir and mix to feed into The same effect can be obtained by injecting the solidifying agent into the slurry as soil, but powder is more advantageous in terms of cost. The solidifying agent such as cement powder may be scattered by strong wind during or after spraying. To prevent this, it is effective to cover the entire device with a bellows-contractible skirt whose lower edge is in contact with the ground surface, and the skirt may be square or cylindrical.

[0008] FIG. 5 is a device in which the effect of stirring and mixing the solidifying agent and the earth mass is further improved, and a third stirring unit C is provided between the first and second stirring units A and B, and the first and second stirring units are provided. The chains 20 and 21 of the two stirring units are driven in the same direction, and the chain 30 of the third unit is driven in the opposite direction. In the figure, 26 is a track frame, 27 is a driven sprocket, 28 is a support member, and 29 is an auxiliary sprocket. Drive sprocket 10
Is mounted on a drive shaft 33 that rotates integrally with the drum of the hydraulic motor 9. Reference numeral 35 denotes a driving sprocket of the third unit C, which is mounted on a rotating shaft 37 of the hydraulic motor 36.
In this device (3-unit, 2-axis drive), the number of stirring motors is three, but the number of drive motors is two. The work efficiency increases.

[0009]

The device of the present invention is intended mainly for the use of a solidifying agent for surface spraying. The device is inserted into the soil freely and shallowly according to the softness of the peat layer or other soft ground, and is used between a plurality of units. In the process of transferring the earthen lump, fine-graining and uniform stirring and mixing with the surface spray solidifying agent are efficiently achieved.

[Brief description of the drawings]

FIG. 1 is an overall side view of the device of the present invention.

FIG. 2 is a front view of the device.

FIG. 3 is a side view of the same.

FIG. 4 is an explanatory diagram of the transfer of the earth mass between the stirring units.

FIG. 5 is a front view of a three-unit parallel device.

FIG. 6 is a side view of the same.

[Explanation of symbols]

 1 Excavator 2 Arm 3 Stirring / mixing device 4 Gate main frame 6,7 Side plate 8,9,36 Hydraulic motor 10,11,35 Drive sprocket 12,13 Horizontal rod 14,15,26 Track frame 16,17,27 Follower sprocket 20,21,30 Chain with stirring blade

Claims (3)

[Claims] 1. A track frame with a driven sprocket extending downward and fixed between both side plates of a portal frame attached to the tip of a work vehicle arm, a driving sprocket, and a chain with stirring blades wound around both sprockets.
The first and second stirring units are arranged side by side in two rows, and the respective drive sprockets constituting each unit are connected to be driven by a separate hydraulic motor fixed to the portal frame. A stirring and mixing device for ground improvement, wherein the chains with stirring blades of the first and second stirring units are driven at the same speed or at different speeds in mutually opposite directions. 2. A track frame with a driven sprocket extending downward and fixed between both side plates of a portal frame attached to the tip of a working vehicle arm, a driving sprocket, and a chain with stirring blades wound around both sprockets.
The first and second stirring units are arranged in three rows and the respective drive sprockets constituting each unit are connected so as to be driven by separate hydraulic motors fixed to the portal frame. A stirring and mixing device for ground improvement, wherein adjacent driving sprockets are driven at the same speed or at different speeds in different directions. 3. The device according to claim 2, wherein the drive sprockets of the stirring unit located in the middle are driven by independent drive sources, and the drive sprockets of the stirring units located on both sides are driven by a common drive source. A stirring and mixing device.