JPH076342B2 - Excavator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an excavator used for driving a pile into soil or excavating a deep vertical hole in the soil.

[Conventional technology]

When building a residential land or constructing a factory, in order to create the ground, a vertical hole is drilled deep into the soil to drive a pile, or soil is mixed while boring, and a pillar pile is made while spraying a slurry liquid of a soil hardening agent. As a machine for boring a vertical hole in such ground construction, a rotating rod is attached to a column mounted on a base machine (bulldozer) so as to be vertically movable, and excavation is performed while rotating the rotating rod by a hydraulic motor. Particularly, in the vertical moving mechanism of the rotary rod using the chain, as shown in FIG.
Etc., the chain 38 is wound around these sprockets, and the case of the rotating rod 39 is fixed to the chain 38 so as to move up and down. A hydraulic motor 40 is attached to the upper end of the rotating rod 39.

[Problems to be Solved by the Invention]

In the vertical movement mechanism of the conventional excavator using the chain as shown in FIG. 6, the rotating rod 39 can move up and down by the distance L between the upper end and the lower end of the frame 30. Therefore, there is a limit to the excavation depth, and it is not suitable when deep boring is required. The present invention has been made to solve such a problem, and its object is to flexibly respond to the situation from shallow vertical holes to deep vertical holes when drilling vertical holes, and also to improve the sand mixing efficiency. It is to provide an excavator that can be improved.

[Means for Solving the Problems]

That is, in order to solve the above-mentioned problems, the excavator according to the present invention has a sprocket fitted with a drive source and a plurality of sprockets on the outside and fitted to a drive shaft of the drive source, and the plurality of sprockets endlessly and Rod case in which a chain is wound with a portion penetrating inside, and a slide rod in which a large number of protrusions engaging with the chain are planted on one surface and a rotary excavation portion is provided at the tip and the rod case is penetrated And are provided.

[Action]

When the drive source for raising the rod case, for example, a hydraulic cylinder is activated to raise the rod case and the drive source in the tip portion of the slide rod is driven, the excavation portion starts rotating to excavate the soil. When the drive source attached to the rod case is driven, the slide rod slowly descends while excavating the earth and sand while rotating only the excavation portion. In this case, only the excavation part rotates, and the slide rod or the like does not rotate. Therefore, the sand and sand are well agitated and the hardener is well mixed. Further, although the chain is transported endlessly, the slide rod only engages with the chain and moves up and down. Therefore, if the slide rod is long, it will be long,
If the length is short, the vertical hole can be drilled deeply or shallowly depending on the length.

〔Example〕

Specific embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the structure of an excavator according to the present invention. A base 1 such as a bulldozer is equipped with a mount 1, and the mount 1 can be moved back and forth by a cylinder 2. Reference numeral 3 is a rod case to which a metal fitting 4 is fixed, and is pivotally attached to the metal fitting 5 fixed to the mounting base 1 so as to be rotatable around a shaft 6. The rod case 3 can be erected or tilted by a hydraulic cylinder 7 having both ends pivotally attached to the mount 1. A sprocket and a hydraulic motor are attached to the upper portion of the rod case 3 as described later. In addition, 8 is a metal fitting for supporting the rod case 3 when it is tilted. Reference numeral 9 denotes a slider rod that is movable in the rod case. A tip end of the slider rod is connected to a tubular body 10 and an excavation portion 13, a hydraulic motor 11 is housed in the tubular body 10, and fixed blades are provided outside. 12 is mounted so as to project laterally. Further, the excavation section 13 is the hydraulic motor 11
Although it is rotatably attached, a spiral stirring blade 13a for stirring the earth and sand and an excavating claw 13b that bites into the earth and sand during rotation are formed. The fixed blade 12 is a digging portion 13
It is fixed in the soil so that it will not rotate around when rotating.

Next, the rod case 3 for movably engaging the slide rod 9 has an upper portion, for example, a hydraulic motor as a drive source.
A plate 15 accommodating 14 and sprockets 16 to 21 (19 is a sprocket fitted to the drive shaft of the hydraulic motor 14) are attached. A chain 22 is endlessly wound around the sprockets 16 to 21 and the like so as to penetrate through the rod case 3.

FIG. 2 is a perspective view of the slide rod 9, the rod case 3, the sprocket 16 and the like when they are partially assembled. A large number of protrusions 23, 23 ... Are planted on one side of the slide rod 9 at regular intervals, and the chain 22 has these protrusions 23.
Is adapted to engage with. That is, as shown in FIG. 3, the slide rod 9 moves as shown by an arrow along with the movement of the chain 22 by driving the hydraulic motor 14 attached to the rod case 3. In the slide rod 9, a hydraulic pipe (not shown) for a hydraulic motor 11 that drives the excavation portion 1 and a slurry liquid pipe (not shown) for a hardening agent are provided.

The configuration of the excavator according to the present invention is as described above,
Next, the operation will be described.

FIG. 4 shows a perspective view when the slide rod 9 is driven. That is, the hydraulic motor mounted on the rod case 3
When the chain 22 is driven by 14, the sprockets 16, 17, ..., As shown in FIG. 3, the chain 22 is engaged with the projections 23 provided on the slide rod 9 one after another and the chain 22.
The slide rod 9 moves in the conveyance direction of.

FIG. 5 shows the excavator according to the present invention when the slide rod 9 is vertically erected to excavate a vertical hole.
That is, when the cylinder 7 is operated to erect the rod case 3 and the hydraulic motor 11 built in the cylinder 10 is driven, the excavation portion 13 starts to rotate and the excavation claw 13b excavates the soil. The hydraulic motor mounted on the rod case 3
When 14 is driven, the slide rod 9 slowly descends while excavating the earth and sand while only the excavation part 13 rotates. In this case, only the excavation portion 13, the excavation claw 13b, and the rotary blade 13a rotate, and the tubular body 10, the fixed blade 12, and the like do not rotate. Then, the fixed blade 12 is stopped in the soil, and when the slurry liquid of the hardening agent is jetted from the fixed blade 12, the earth and sand and the excavation part 13 do not rotate freely, so the earth and sand are well stirred and the hardener is also well mixed. The chain 22 is transported endlessly, but the slide rod 9 only engages with the chain 22 and moves up and down. Therefore, when the slide rod 9 is long, it is long, and when it is short, it is short and the vertical hole can be excavated deeply or shallowly depending on the length.

Although one embodiment of the present invention is as described above, the hydraulic motor as a drive source in the above embodiment may be replaced with an electric motor, a gear motor or the like. Further, although the vertical drive mechanism of the slide rod is driven by the chain and the sprocket, a combination of a winch, a male screw and a female screw, a combination of a pinion and a rack may be used.

Further, the excavator according to the present invention is such that an elongated rotary shaft is fitted in the slide rod 9 and is driven to rotate at the upper portion,
That is, the present invention can be applied to a conventional boring excavator.

〔The invention's effect〕

Since the excavator according to the present invention is configured as described above in detail, the excavator can have a compact shape as a whole and can be mounted on the conventional base machine. Therefore,
Even in a place where a large excavator could not be carried in conventionally, it can be carried in and the same work as a large machine can be performed. That is, since the chain wound around the sprocket through the rod case is transported endlessly, various slide rods from long ones to short ones can be used if only the slide rods are replaced. Therefore, it suffices to use a slide rod having a length corresponding to a vertical hole having a required depth. Further, in the excavation unit attached to the tip of the slide rod, the upper side of the excavation unit, which is a rotating body, does not rotate, and the soil is cut, or the efficiency of stirring the soil, mixing the curing agent with the sand, and the like becomes extremely good.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of an excavator according to the invention, and FIG.
FIG. 3 is a perspective view when assembling a slide rod, a rod case, a sprocket, and the like, and FIG. 3 is a cross-sectional view showing a state where the projection of the slide rod and a chain are engaged with each other to move the slide rod in the rod case, FIG. 4 is a perspective view when driving and moving the slide rod, and FIG. 5 is a diagram showing a state where the slide rod is vertically erected to dig a vertical hole in the excavator according to the present invention, FIG. FIG. 7 is a diagram schematically showing a chain drive mechanism of a conventional excavator. 1 ... Mounting base, 2,7 ... Hydraulic cylinder 3 ... Rod case, 9 ... Rod case 10 ... Cylinder, 11,14 ... Hydraulic motor 12 ... Fixed blades, 13 ... Excavation section, 13a ...... Stirring blade 13b …… Drilling claw, 16 to 21 …… Sprocket 22 …… Chain, 23 …… Protrusion

Claims (1)

[Claims] 1. A sprocket in which a drive source and a plurality of sprockets are mounted on the outside, and a rod in which a chain is wound endlessly and a part of which penetrates the plurality of sprockets. An excavator comprising: a case; and a slide rod having a plurality of projections engaging with the chain, which are planted on one surface thereof, a rotary excavation portion provided at a tip end thereof, and a rod case penetrating the rod case.