JPH0827769A - Ground improvement machinery - Google Patents

Abstract

PURPOSE:To improve ground by stirring and mixing soil in width wider than breadth of stirring blades provided in a row on a chain. CONSTITUTION:Stirring blades 11, 12 of chains 10, 10 are arranged rectilinelly respectively in the cross direction in a foundation improvement machinery devised to stir and mix soil by respectively arranging a pair of left and right sprockets 9, 9 on upper and lower parts of a support frame body 1, installing the endless chains 10, 10 between the upper and lower sprockets 9, 9, providing a plural number of the stirring blades 11, 12 on each of the chains 10, 10, and revolving the chains 11, 12. Additionally, each set of these stirring blades 11, 12 in the cross direction is provided in a snaking type along both of the chains 10, 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement machine for rotating a chain having stirring blades to stir and mix the soil for improvement.

[0002]

2. Description of the Related Art Conventionally, in this type of ground improvement machine, a pair of left and right sprockets are arranged at the upper and lower portions of a support frame, and an endless chain is installed between the upper and lower sprockets. Symmetrical stirring blades having approximately the same width are arranged in a row, and each chain is rotated together with the rotation of the sprocket to stir and mix the soil while supplying the solidifying material powder or milk. .

[0003]

By the way, in such a conventional ground improvement machine, the lateral width that can be excavated and agitated by each agitating blade is limited to the lateral width due to the configuration of the agitating blade, and the soil wider than the agitating blade is agitated. It was not possible to mix. Therefore, an object of the present invention is to provide a ground improvement machine capable of agitating soil having a width wider than the lateral width of the agitating blade to improve the improvement efficiency.

[0004]

In order to achieve the above object, the ground improvement machine of the present invention has a pair of left and right sprockets disposed at the upper and lower portions of a support frame, and an endless chain between the upper and lower sprockets. In a ground improvement machine in which a plurality of stirring blades are installed in a row in each chain and the soil is stirred and mixed by rotating the chains, the stirring blades of both chains are laterally crossed with each other. Are arranged so as to be aligned on a straight line, and each pair of the stirring blades in the lateral direction is arranged in a meandering shape along both chains.

[0005]

The stirring blades of both chains are arranged so as to be aligned in a straight line in the lateral direction, and each pair of stirring blades in the lateral direction are arranged in a meandering manner along both chains. The soil having a width wider than the width of the pair of stirring blades can be stirred and mixed at the same time. Moreover, since the soil having the width is originally mixed by stirring, the stirring torque is reduced as compared with the case where the stirring blades having the same width are used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the ground improvement machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a ground improvement machine according to the present invention, and FIG. 2 is a side view thereof. In the figure,
Reference numeral 1 denotes a support frame body formed by combining a horizontal plate 2 and left and right vertical plates 3 and 3 into a front gate shape. On the upper surface of the horizontal plate 2, an operating arm of a movable actuator such as a backhoe (not shown). The mounting plates 4 and 4 for attaching to the tip of the are installed upright.

Inside the left and right vertical plates 3 and 3, two support plates 5 and 5 having upper ends fixed to the horizontal plate 2 are suspended.
Between the vertical plates 3 and 3, a horizontal shaft 6 penetrating both the support plates 5 and 5 is horizontally installed on the upper part thereof, and a hydraulic motor 7 for rotating and driving the horizontal shaft 6 is attached to one end thereof. In addition, a horizontal shaft 8 is provided horizontally below the support plates 5 and 5.

A pair of left and right sprockets 9 and 9 are provided inside the support plates 5 and 5 on the upper and lower horizontal shafts 6 and 8, respectively.
Are fixed, and endless chains 10, 10 are installed between the upper and lower sprockets 9, 9. A plurality of agitating blades 11, 11, ... And a plurality of agitating blades 12, 12, ... Which are arranged in a straight line in the lateral direction are arranged and fixed to both chains 10, 10, respectively. The pair of stirring blades 11 and 12 in the lateral direction are
All have the same width.

As shown in FIGS. 4 and 5, each of the stirring blades 11 and 12 is formed by integrally fixing a flat T-shaped blade portion 14 to the front surface of a horizontally long fixing plate 13 fixed to the front surface of the chain 10. To be done. As shown in FIG. 6, each fixing plate 13 has a left stirring blade 11a at the uppermost stage having a width three times that of the right stirring blade 12a.
Three blades 14 and one blade 14 are fixed at the same interval as the width of the blades 14, respectively.

The left stirring blade 11b and the right stirring blade 12b in the second stage have the same lateral width, and two blade portions 14 are fixed at equal intervals. Furthermore, the left stirring blade 11c of the third stage has a width of one third of the right stirring blade 12c,
One and three blades 14 are fixed at equal intervals. After that, it is similarly repeated. This allows
Each set of stirring blades 11 and 12 in the lateral direction is arranged in a meandering manner.

Further, since the wing portions 14 of each fixing plate 13 are arranged so as to be separated from each other by the same lateral width as the wing portions 14, in the direction along the both chains 10 and 10, between the left and right wing portions 14 and 14, Since the stepped blades 14 are located, the soil is uniformly stirred when the soil is stirred and mixed, and the stirring performance is improved.

Reference numeral 15 denotes a control box which is fitted between the support plates 5 and 5 and between the sprockets 9 and 9, and both sides thereof are fixed to the support plates 5 and 5. If the soil originally enters the chains 10 and 10 and is not discharged as it is, the soil control box 15 will be applied as a load as it is when the soil improvement machine is pulled out from the soil, and its operation will be hindered. This is because

The insect control box 15 has a pair of left and right shock absorbers 16 and 16 installed therein. The shock absorbers 16 and 16 are mounted on the front surface of a base plate 17 mounted in the control box 15 via a leaf spring 18 to control the control box 1.
5. A holding shaft 20 projecting forward from the opening 19 on the front surface is mounted, and a pressing sprocket 21 for applying tension to the chains 10, 10 is mounted on the tip thereof.

The pressing sprocket 21 is always urged forward by a leaf spring 18, but when a stone intervenes between the sprocket 9 and the chain 10 and the chain 10 is about to come off, it is pushed back backward. , Is trying to avoid such a situation.

The use of the ground improvement machine of the present invention thus constructed will be described. When the hydraulic motor 7 is driven at the site where soil is improved, the chains 10, 10 rotate in the direction of the arrow in FIG. 2 as the upper sprockets 9, 9 rotate together with the horizontal shaft 6, and the stirring blades move. 11 and 12 are sequentially moved up from below. Then, while the powder of the solidifying material or milk is supplied, the soil is excavated and stirred and mixed.

At this time, the uppermost stirring blade 11 shown in FIG.
In a and 12a, the left end of the total stirring width W is fully stirred, but at the right end, the width of about two blades 14 is left without stirring. In the next second stage stirring blades 11b and 12b, the width of one blade portion 14 at each of the left and right ends of the total stirring width W is left without stirring. Then, the third stage stirring blade 11
In c and 12c, the stirring is performed up to the right end of the total stirring width W, but at the left end, the width of about two blades 14 is left without stirring. After that, the same operation is repeated to perform the circulation operation.

[0017]

As described above, in the ground improvement machine of the present invention, each set of agitating blades arranged in a straight line in the lateral direction are arranged in a meandering manner along both chains. It is possible to stir and mix the soil having a width equal to or larger than the width of the stirring blade, whereby the soil improvement efficiency is significantly improved.

Moreover, since the stirring blade originally adapted to the improved width is not required, the stirring torque can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a front view of a ground improvement machine of the present invention.

FIG. 2 is a side view of the same.

3 is a sectional view taken along line XX of FIG.

FIG. 4 is an enlarged plan view of a stirring blade.

FIG. 5 is a side view of the same.

FIG. 6 is a layout view of only a stirring blade.

[Explanation of symbols]

 1 Support frame 9,9 Sprocket 10,10 Chain 11,12 Stirrer

Claims (1)

[Claims] 1. A pair of left and right sprockets are arranged on the upper and lower portions of the support frame, and an endless chain is installed between the upper and lower sprockets, and a plurality of stirring blades are arranged in line in each chain. In a ground improvement machine configured to stir and mix soil by rotating the chains, the stirring blades of both chains are arranged so as to be aligned in a horizontal direction with each other, and a set of each of these lateral directions is arranged. The stirring blade is
A ground improvement machine characterized by being arranged in a meandering shape along both chains.