JPS6360170B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a soil improvement machine used to improve soft soil into hard soil, and more specifically relates to an excavator that performs a kneading action on the tip of the arm of a power shovel. This relates to a soil conditioner equipped with a soil improver.

(b) Prior art Usually, when carrying out civil engineering and construction works, etc., this method is used for soft ground, poor soil that does not harden easily over a long period of time, and reclaimed land from ponds, swamps, etc. It is necessary to harden it immediately.

By the way, in the past, to improve the soil quality mentioned above, concrete blocks, factory waste, loose stones, etc. were used on the soft ground.
The soil was replenished with earth and sand and compacted using a roller machine, or a hardening agent such as cement or lime was spread, and an iron plate was attached to the end of the arm of a power shovel, and the agitating action of this was used to mix and harden the ground.

However, with these conventional methods, it takes a lot of time and effort to level the ground, and even when using a power shovel, iron plates etc. have great resistance to the kneading operation, resulting in unfilled areas, damage to the kneading parts, and mechanical failure. However, no improvement in the kneading rate could be expected.

C. Purpose of the invention: To provide a digging tool that performs a kneading action by attaching a digging tool to the tip of the arm of a power shovel, and to efficiently mix soft soil with a hardening agent such as cement or lime using the digging tool, and to mix the cement, etc. The purpose of this project is to make it easy to level the ground using excavating tools following the soil improvement, and to ensure that power shovels and excavating tools do not accidentally break or malfunction.

D. Configuration of the invention A digging tool 6 is installed at the tip of the arm 4 of the power shovel 1 so as to be capable of scraping operation, and the digging tool 6
, two wide side plates 1 having a plurality of window holes 19
3, 13' and a plurality of narrow intermediate plates 14 disposed between the two side plates 13, 13' are connected at the base, tip and intermediate parts by connecting members 16, 17, 18. Constructed into a grid-like frame body, each of the side plates 13, 1
A blade body 21 is fixed to the tip of the stirrer 3' and the intermediate plate 14, and a plurality of round rod-shaped stirring rods 20 are provided on each of the side plates 13, 13' and the intermediate plate 14 with both ends protruding.

Embodiment 1 In FIGS. 1 and 2, 1 is a power shovel main body, 2 is a first arm pivotably connected to the power shovel main body 1 by a first hydraulic cylinder 3, and
4 is a second arm rotatably pivoted to the tip of the first arm 2 and raised and lowered by a second hydraulic cylinder 5; 6 is a kneading device installed at the tip of the second arm 4; It is an excavation tool that performs A part of the bracket 11 provided at the base of the digging tool 6 is pivotally attached to the tip of the second arm 4 by a rotating shaft 7,
Furthermore, a portion of the bracket 11 is connected by a rotating shaft 15 to a link 9 connected to the tip of a piston rod 12 of a third hydraulic cylinder 8. The link 9 is connected to the piston rod 12 of the third hydraulic cylinder 8 together with a link 10 whose one end is pivotally connected to the second arm 4. Further, a part of the base of the digging tool 6 may be directly used as a bracket. Because of the above configuration, by moving the rod 12 of the third hydraulic cylinder 8 into and out, the second arm 4
The digging tool 6 can be caused to perform a scraping operation as shown by the dashed line in FIG. 2 at the tip.

As shown in FIGS. 3 to 5, the digging tool 6 includes both side plates 13, 13' and the two wide side plates 13,
A plurality of narrow intermediate plates 14, 14, for example, two narrow-width intermediate plates 14, 14, arranged at equal intervals as shown in the figure or arbitrarily spaced between the 13' It is connected by connecting members 16, 17, and 18 to form a frame body, and is formed into a hoe shape that is curved inward and open from the top to the bottom. In the embodiment, a bracket 11 is shown at the base end of the intermediate plates 14, 14. Incidentally, a plurality of window holes 19, 19, such as one window hole or two window holes as shown, are provided in each of the side plates 13, 13'. And both side plates 13, 13' and a plurality of intermediate plates 14,
As shown in 14, a plurality of short stirring rods 20 are provided.
Attach through-hole with both ends protruding. in this case,
The plurality of stirring rods 20 are arranged in a distributed manner between each stirring rod, and both side plates 13, 13' and intermediate plates 14, 14 are arranged.
Form a gap in between. Further, connecting members 17 are provided at the tips of the side plates 13, 13' and the intermediate plates 14, 14, respectively.
The blade body 21 is detachably or fixedly attached as shown in the figure.

Note that the stirring rod 20 and the intermediate rod-shaped connecting member 1
Reference numeral 8 is made of a steel material with particularly excellent wear resistance, and the bottom sides 13a of the side plates 13, 13' that contact the ground are substantially straight along the entire length, and are also serrated.

Next, the operating procedure of the apparatus of the present invention will be explained as follows.

First, a layer of soil conditioner such as cement or lime is removed on the surface of the soft ground whose soil quality is to be improved. Next, the power shovel 1 equipped with the digging tool 6 performs the kneading work in the following manner. That is,
Before driving, the first arm 2 and the second arm 4 are erected by protruding the rod 22 of the first hydraulic cylinder 3 and retracting the rod 23 of the second hydraulic cylinder 5, as shown by the chain line in FIG. 3 hydraulic cylinder 8
The rod 12 is retracted and the digging tool 6 is erected at the tip of the second arm 4. In this state, the rods 23 and 23 of the hydraulic cylinders 3 and 5 are moved in and out, respectively, and the first arm 2 and the second arm 4 are laid down as shown by the solid line, and the digging tool at the tip of the second arm is removed. 6 close to the ground. After the above operation or together with the above operation, drive the third hydraulic cylinder 8,
The digging tool 6 is caused to perform a raking operation via links 9 and 10, and the ground is scraped off with the digging tool 6. Further, during the above operation, the power shovel main body 1 is driven to swing left and right.

As a result, the digging tool 6 performs a vertical scraping operation and a horizontal reciprocating rocking operation at the same time. This raking action of the digging tool 6 causes the ground to be plowed, and in addition to this, the many dispersed stirring rods 20 and the connecting members 18 perform plowing, and the ground is effectively stirred. Ru. That is, soil is discharged from the windows 19, 19 under the digging tool 6 and on the side plates 13, 13', whereby the soil conditioner is sufficiently kneaded into the soft soil and the soil becomes hard.

When the mixing is completed in the application range of the power shovel body 1 as described above, the power shovel body 1 is moved and the same work is performed on the unimproved ground.
During this excavation, the mixed soil may interfere with the digging work of the unmixed soil in the depth direction. In such a case, both side plates 13 of the digging tool 6,
The digging tool 6 is formed into a bucket by attaching an iron plate or the like to the entire surface under the intermediate plates 13' and a plurality of intermediate plates 14, and scoops out the mixed soil with the bucket and temporarily leaves it somewhere else. When the overall soft soil has been improved as described above, the excavator 6 is attached to its both side plates 1.
The power shovel main body 1 is rotated and moved so that the linear or serrated bottoms 3 and 13 come into contact with the surface of the improved soil to level the ground.

Effects of the Invention A digging tool that penetrates into the ground to stir and knead the soil is rotatably attached to the end of the arm of a power shovel, and the digging tool is arranged in parallel with both side plates and a plurality of intermediate plates. Formed into a lattice-like hoe-shaped frame body with connecting members,
Window holes are provided in both side plates, and multiple stirring rods are installed in a distributed manner with spaces provided on both side plates and the middle plate.
Since the blade body is attached to the tips of both side plates and the intermediate plate, the soil can be released downward by the vertical side plates and intermediate plate, the horizontal stirring rod, and the connecting member during the digging operation with the digging tool. Not only does it fall from the ground, but it is also discharged three-dimensionally to both sides through the windows in the wide side panels, which are configured to be scooped up in buckets, ensuring sufficient agitation, and this is then used to spread soil conditioners such as cement. By applying it to the ground with soft soil, it is possible to effectively mix the improver with the soft soil.
Soft ground can be easily hardened.
In particular, since the main members that perform the stirring action are a large number of round rod-shaped stirring rods, there is little resistance to the soil against movements in a wide range of directions, such as rotation and left-right swing of the excavation tool, and the excavation work is easy. The work was carried out without any difficulty, and there was no damage to the digging tools or other parts, and no malfunction of the power shovel itself.

In addition, the digging tool has straight or saw-toothed bottoms on both sides, which makes it easy to level the ground after soil improvement by turning the power shovel with the bottoms in contact with the ground. Also, since iron plates and the like can be easily attached to the bottom of this digging tool, it can also be conveniently used as a bucket.

Since the soil improvement machine according to the present invention has a digging tool attached to a power shovel in a detachable manner, the structure is simple, and soil improvement work can be easily and quickly performed up to the leveling of the land without any other incidental work. The practical effects are great.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a power shovel to which the present invention is installed, Fig. 2 is a side view showing a state in which the digging tool, which is the main part of the structure according to the present invention, is equipped on the arm of the power shovel, and Fig. 3 4 are a plan view and a side view of the digging tool, and FIG. 5 is a perspective view of the arm. 1... Power shovel body, 2... First arm, 4... Second arm, 6... Excavation tool, 13,
13'...Both side plates, 14...Intermediate plate, 16, 17,
18... Connecting member, 19... Window hole, 20... Stirring bar, 21... Blade body.

Claims (1)

[Scope of Claims] 1. A digging tool is installed at the tip of the arm of a power shovel so as to be able to perform a raking operation, and the digging tool is connected to two wide side plates having a plurality of window holes, and 2. A plurality of narrow intermediate plates disposed between the side plates are connected at the base, the tip, and the intermediate part by connecting members to form a lattice-shaped frame, and each of the side plates and the plurality of intermediate plates are connected to each other by connecting members. 1. A soil improvement machine characterized by having a blade fixed to the tip of the soil improver, and a plurality of round stirring rods having both ends protruding from each side plate and a plurality of intermediate plates.