JPS61183522A - Self-propelling type excavator - Google Patents

Abstract

PURPOSE:To decrease the size of a machine and to reduce a term of works, by a method wherein a vertically slidable excavating mechanism and a trench processing mechanism are provided, soil is discharged as a trench is continuously excavated, and concrete is pressed therein to build an underground wall. CONSTITUTION:A chain 21 for cutter and a excavating blade 22 are rotated in a given direction, an excavating mechanism 15 is gradually lowered to start excavation, and a trench is continuously excavated as a self-running vehicle 1 is advanced. Both side edges of a support plate 32 of a trench processing mechanism 30 are slightly bent backward, concrete is pressed in for injection, and an underground wall of concrete is built simultaneously with excavation of the trench. When excavation of the trench is completed, the excavating mechanism 15 and the trench processing mechanism 30 are raised to a raising end position and is moved to other spot. This reduces an occupying area during a work, enables excavation of the trench at a limited space, and permits utilization of the filling reaction force of concrete as the advancing force of a machine.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention continuously excavates trenches for laying water and sewage pipes, electric cables, etc., and at the same time pours concrete into the excavated trenches to form underground walls. Concerning the construction of self-propelled excavators.

<Conventional technology> Generally, in urban areas, when excavating trenches in the ground for water supply and sewerage, side ditches, power and communication cable tunnels, etc., in addition to the conventionally compacted soil, hard roads mixed with sand and gravel are used. Because it is necessary to excavate the ground, a shovel excavator with a relatively large digging force is often used.

However, the excavator excavator has a large body, and the drive body must turn when loading excavated soil onto a transport vehicle, resulting in a large working radius and problems such as traffic obstruction.

In addition, because trench excavation and excavated soil loading are performed in the same packet, there is a lot of over-digging due to the width of the packet and the operation of the long boom, and each work is done intermittently, resulting in a small amount of trench excavation per unit time. There were drawbacks.

In order to eliminate these drawbacks, the steering wheel is installed at the front of the vehicle body equipped with the driver's seat, and the work equipment is mounted on the side of the vehicle body of a self-propelled vehicle that has drive wheels at the rear. To install this work equipment, a swinging cylinder is used to install a swinging link on the member, the upper end of which can swing freely in the front and rear directions, and a swinging bracket that can be tilted freely by a tilt cylinder is installed on the top of the swinging link. A work machine support member is provided on the swing bracket via parallel links and a lift cylinder provided diagonally between these parallel links, and a plurality of work machine support members are provided on the work machine support member to be rotated in one direction by the reciprocating movement of the drive cylinder. A continuous trench excavation machine has been proposed which is equipped with an excavation mechanism having a packet of
For example, Japanese Patent Application Laid-open No. 55-119834).

(Problems to be solved by the invention) However, since such excavation machines have a driver's seat in the vehicle body, there is a limit to how compact the machine can be. There was a problem in that it was impossible to dig trenches in narrow spaces.

In addition, in addition to the unstable contact of excavation packets in excavated trenches, the trench walls collapse over time, so it is necessary to perform earth retaining wall construction such as driving pot piles after trench excavation, which takes a long time and is costly. The disadvantage was that it was expensive.

<Means for solving the problems> This invention is made in view of the above points,
The contents will be explained below using FIGS. 1 and 2.

An excavation mechanism (15) that is guided by a guide column (23) and can slide vertically at the front of a self-propelled vehicle (1) having endless tracks (13) on both sides of the frame (2); The excavation mechanism (
15) and is located opposite to the rear of the guide member (37).
The pretreatment mechanism (3
0), the excavation mechanism (15) has a plurality of excavation blades (22) that are driven in a predetermined direction together with a cutter chain (21), and the pretreatment mechanism (30) includes the excavation blades (0). 22) It has a receiving plate (32) having approximately the same width as the receiving plate (32) and a suction/exhaust pipe (34) at the rear of the receiving plate (32), and allows the excavating mechanism (15) to hang down and advance in a narrow place. Continuously excavate a trench, and at the same time suck out the excavated soil in the trench, or inject concrete into the trench, and use the filling reaction force as part of the forward force of the excavator. Underground wall (5
This is a self-propelled excavator that performs the formation of 3) in parallel and is operated without a driver on board.

<Effect> Next, its operation will be explained based on FIGS. 1 to 6.

In the self-propelled excavator, in the standby state, the excavation mechanism 15 and the pretreatment mechanism 30 are each at the rising end, and the lower ends of each are located above the ground surface GL (see FIG. 3A).

First, by starting the power generator 47, power can be supplied to each motor.

Then, the drive motor 48 is activated to drive the endless track 13, and the operation handle 4 is operated to position the excavation mechanism 15 on the trench excavation schedule line.

Next, the excavation mechanism 15 is lowered by the lifting motor 29, and its lower end is brought into contact with the ground.

Then, the cutter motor 24 is started to rotate the cutter chain 21 and the excavation blade 22 in a predetermined direction (the direction of the dashed-dotted line arrow in FIG. 1).
is gradually lowered to start excavation perpendicular to the ground surface GL, and when the lower end of the excavation mechanism 15 reaches the desired groove depth, the self-propelled vehicle 1 is advanced to continuously excavate the groove (the 3
(See Figure B).

The earth and sand excavated by the excavation blade 22 is scraped upward by the excavation blade 22, further scraped onto the earth discharge chute 46 by the roller brush 43, and loaded onto a transport vehicle (not shown).

As the trench excavation progresses and the trench cleaning mechanism 30 reaches a position where it can be lowered, the pretreatment mechanism 30 is lowered using the lift/% handle 38.
Stop the lower end at a position slightly higher than the bottom of the groove.

As the self-propelled vehicle l moves forward, both side edges of the receiving plate 32 of the pretreatment mechanism 30 are slightly bent rearward, but the side walls of the groove are The excavating blade 22 acts as a partition by appropriately elastically contacting the excavating blade 22.
The gap between the pretreatment mechanism 3''b and each wall of the groove is minimized (see FIGS. 1 and 4).

Next 7, concrete is press-fitted and injected from a concrete pump (not shown) or a ready mixer truck via a flexible hose 36, and the suction/discharge hole 34a of the suction/discharge pipe 34 is poured.
From there, concrete is filled into the groove behind the groove treatment mechanism 30 to form an underground wall 53. The filling reaction force of this fluid concrete stably supports the excavation mechanism 15, and at the same time forms part of the forward force of the self-propelled vehicle l (see Fig. 3C). At the same time, concrete underground wall formation is carried out continuously.

When the trench excavation is completed, the excavation mechanism 15 and the pretreatment mechanism 30
After raising the excavator to the upper end position, the self-propelled excavator is driven by itself, or the excavator is loaded onto a transport vehicle and moved to another location.

Note that the above-mentioned concrete pouring can be selected at will.

In addition, when the pretreatment mechanism 30 is used to suck out excavated soil remaining in the excavated trench, a vacuum machine (not shown) is connected via the flexible hose 36, and the suction port 5 is connected to the suction/discharge hole 34a.
1 is worn.

At this time, the pretreatment mechanism 30 is lowered in accordance with the amount of excavated soil remaining, and the vertical position of the suction port 51 is adjusted.

Even in the case of sucking out the excavated earth and sand, trench excavation and suction of the remaining excavated earth and sand can be performed simultaneously (see the third diagram).

Ditch excavation is performed as described above, and for small-scale things such as side ditches, only trench excavation is performed, and as shown in Fig. 5, the pre-formed U-shaped groove 52 is buried and the side A side groove is formed by backfilling one side (56 in the figure indicates the backfilling part).

Furthermore, when excavating a large tunnel, as shown in FIG. 6, underground walls 53, 53 are cut using the self-propelled excavator of the present invention on the outside of the planned tunnel 54 side wall. After forming a tunnel 54 by discharging the earth and sand between the two underground walls 53 and laying an electric cable 55, the upper part is backfilled and the backfilling part 56 is paved to complete the tunnel. Ru.

(Effects of the Invention) As explained above, the self-propelled excavator of the present invention has an excavator groove equipped with a plurality of excavating blades driven by a cutter chain in the front part of the self-propelled vehicle having an endless track. A pretreatment mechanism is installed that can be raised and lowered, and is equipped with a receiving plate that is slightly wider than the excavating blade and located opposite to the rear of this excavating mechanism, and a suction and exhaust pipe at the rear of this receiving plate. This configuration allows the machine to be made extremely compact. Furthermore, since the excavation mechanism does not extend outward from the self-propelled vehicle, it occupies a small area during work, making it possible to excavate trenches in narrow places surrounded by structures, and moreover, is highly safe.

Furthermore, multiple hard excavation blades attached to an endless cutter chain continuously and efficiently excavate hard ground with an N value of 50 or more, and at the same time, concrete is poured into the excavation trench to form underground walls. Formation can be done in parallel, earth retaining wall construction to prevent trench walls from collapsing can be carried out efficiently, steel sheet piles, etc. are no longer required, and the endless cutter chain rotates continuously so there is no downtime during excavation. , the trench excavation speed is extremely fast, and the foundation construction period can be cut by more than half.

In addition, the reaction force of filling heavy fluid concrete with a specific gravity of 2.3 into the excavated trench can be used as the forward force of the machine, and
The excavation mechanism can be stably supported.

In addition, the excavated soil remaining in the trench can be removed using the suction port, which stabilizes the underground structure and saves labor.

(Example) FIGS. 1 and 2 are diagrams showing an embodiment of the present invention.

In the figure, l is a self-propelled vehicle that has endless tracks 13 on both sides of the frame 2. An excavation mechanism 15 that can be slid vertically is disposed at the front of the vehicle, and an excavation mechanism 15 that can be slid vertically is installed at the rear. A pretreatment mechanism 30 is arranged opposite to the excavation mechanism 15.

The self-propelled vehicle 1 has a crawler track 13a mounted between toothed front wheels 7 at both ends of a front wheel axle 6 provided at the front of the frame 2 and toothed drive wheels 10 at both ends of a rear wheel axle 9 provided at the rear. are extended to form an endless track 13 with protruding claws on the outside.

At the lower midpoint between the toothed front wheel 7 and the toothed drive wheel lO, the two idlers 12 that are pivotally supported by a support frame 11 fixed to the frame 2 come into contact with each other, creating a large ground surface on the lower surface of the crawler track 13a. is forming. A cover 14 is disposed on the upper half of the crawler belt 13a.

On the other hand, a frame 3 is formed on the frame 2, which is a picture-like frame body consisting of a plurality of upper beams 3a, middle beams 3b, lower beams 3C, and columns 3d. An operating handle 4 is disposed at the rear of the frame 3 with its lower end fixed to the frame 2.

On one side of the frame 3, there is a power generator 47 with an engine that supplies the power necessary as a power source for this self-propelled excavation 411.
An operation panel 5 is provided on the frame 3 near the operation handle 4 and includes various operation switches necessary for operating the self-propelled excavator.

Further, a drive motor 48 is disposed at a predetermined position on the frame 2, and drives a sprocket 8 fixed to the rear wheel shaft 9 via a sprocket 50 and a drive chain 49. The drive motor 48 is rotated by operating the switch that is not turned on, and the rear wheel shaft 9 is rotated in the forward or reverse direction.

The excavation mechanism 15 has an elevating frame 16 with a predetermined length extending vertically and a cross-sectional shape of a letter square, and a sprocket 18 having a horizontal sprocket shaft 17 orthogonal to the traveling direction of the self-propelled vehicle l at the upper end of the elevating frame 16. , and a guide wheel 20 having a guide wheel shaft 19 parallel to the sprocket shaft 17 at its lower end.

An endless cutter chain 21 is passed between the sprocket 18 and the guide wheel 20, and the cutter chain 21 has a cutting blade 22 of a predetermined shape with high wear resistance and impact resistance. A large number of them are mounted outward at equal intervals.

The sprocket shaft 17 also has a cutter motor 24 which is operated by a switch (not shown) on the operation panel 5.
is disposed and is formed to rotate the cutter chain 21 in a predetermined direction.

Further, a rack 25 is arranged vertically on one side of the lifting frame 16, and a pinion 27 having a shaft 26 pivotally supported by guide columns 23 and 23 is meshed with the rack 25, and one end of the shaft 26 is engaged with the rack 25. A lifting motor 29 is connected to the shaft 26 through a locking device 28 that can fix or release the rotation of the shaft 26.

Further, the lifting frame 16 is guided at its four corners by four guide columns 23 vertically installed at predetermined positions on the frame 3, and a lifting motor 29 is activated by operating a switch (not shown) on the operation panel 5. When activated, the elevating frame 16 is movable in the vertical direction.

When the elevating frame 16 is located at the uppermost position, the tip of the excavating blade 22 located at the lower end is located slightly above the ground surface GL, and when the elevating frame 16 is located at the lower end, the excavating blade 22 located at the lower end is located slightly above the ground surface GL.
The two tips are formed to reach a predetermined depth from the ground surface GL.

Note that the excavation mechanism 15 is fixed at a predetermined height position by the locking device 28.

Further, a roller brush 43 supported by l pairs of bearing fittings 44 is disposed on the frame 3 at the front of the excavation mechanism 15, and the roller brush 43 is rotated by a roller brush motor 45 (see FIG. 1). given the direction of the dashed-dotted arrow),
The excavated soil excavated and raked upward by the excavating blade 22 is scraped off, and furthermore, the sticky soil adhering to the excavating blade 22 is removed to prevent the blade from clogging.

An earth discharge chute 46 supported by a support post 3d is disposed below the roller brush 43, and the earth and sand scraped off from the excavation blade 22 is retained and discharged to the outside of the self-propelled vehicle 1. There is.

The groove processing mechanism 30 is formed to have approximately the same vertical length and width as the excavation mechanism 15, and includes a rack plate 31 with a T-shaped cross section extending vertically, a receiving plate 32 on the back of the rack plate 31, and a receiving plate 32 on the back of the rack plate 31. A holding plate 33 is laminated, and a suction/discharge pipe 34 is disposed vertically on the back surface of the holding plate 33.

The rack plate 31 is slightly narrower than the excavation blade 22 and has a T-shaped cross section with strength to withstand concrete filling pressure.
A rack is formed at the center of the width so as to protrude in the vertical direction. A pinion 40 having a shaft 39 supported by bearings 42, 42 is meshed with this rack, and a locking device 41 at one end of the shaft 39 can fix or release the rotation of the shaft 39.
An elevating handle 38 is fixed via the .

In the embodiment, the receiving plate 32 is made of a thick soft synthetic resin plate having a predetermined elasticity, has approximately the same width as the excavating blade 22, and has a size that protrudes slightly downward from the lower end of the rack plate 31. 31 Holding plate 3 with a length equal to the maximum excavation depth on the back
It is sandwiched and fixed by 3.

The suction/discharge pipe 34 is a tubular member with a predetermined diameter, and has a suction/discharge hole 34 a cut rearward and upward at an angle of approximately 45 degrees at its lower end, and its lower end is provided at a higher position than the presser plate 33 . Further, a detachable pipe joint 35 is disposed at the upper end of the suction/discharge pipe 34 toward the rear, and a flexible hose 3 from a raw waste mixer truck or a vacuum machine (not shown) is connected to the detachable pipe joint 35.
6 is connected as desired. Further, a suction port 51 is formed so as to fit tightly into the opening of the suction/discharge hole 34a and has an opening at a downwardly tapered end.

Both sides of the pre-processing mechanism 30 are guided by guide members 37, 37 having an irregular C-shaped cross section and vertically installed in a predetermined position of the frame 3; It is formed to be movable in the direction.

When the pretreatment mechanism 30 is located at the uppermost position, its lower end is located slightly above the ground surface GL, and when it is located at the lowermost position, its lower end reaches a predetermined depth below the ground surface GL. , Furthermore, the pre-processing mechanism 3 is locked by the locking device 41.
0 is fixed at a predetermined height position.

The excavation mechanism 15 and the pretreatment mechanism/mechanism 30 are pulled out upward from the member guiding them, and are respectively attached to the self-propelled vehicle 1.
It can be separated and transported to a remote location. Further, a switch circuit for controlling the operation of each of the motors and a power supply circuit from the power generator are configured.

Incidentally, although an embodiment in which a motor is used as each drive source has been described above, it goes without saying that other drive sources can be employed within the scope of the technical idea of the present invention.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a self-propelled excavator according to an embodiment of the present invention;
FIG. 2 is a plan view, and FIG. 3 is a side sectional view showing various operating modes of the self-propelled excavator for explaining the invention in detail.
FIG. 4 is a plan sectional view showing the excavation surface, FIG. 5 is a sectional view showing the formation of a small excavation groove, and FIG. 6 is a sectional view showing the formation of a large tunnel. DESCRIPTION OF SYMBOLS 1... Self-propelled vehicle, 2... Frame, 13... Endless track, 15... Excavation mechanism, 21... Cutter chain, 22... Excavation blade 23... Guide column, 30... Pretreatment mechanism, 32... Receiving plate, 34... Suction and discharge pipe. 37... Guide member. Patent applicant Figure 2 Figure 4

Claims (1)

[Claims] At the front of the self-propelled vehicle, which has endless tracks on both sides of the frame, there is an excavation mechanism that is guided by guide columns and can freely slide in the vertical direction, and an excavation mechanism that is located opposite to the rear of the excavation mechanism and that is attached to the guide member. a groove processing mechanism that is guided and slidable in the vertical direction; the excavation mechanism has a plurality of excavation blades that are driven in a predetermined direction together with a cutter chain; A self-propelled excavator comprising a receiving plate having approximately the same width and a suction and exhaust pipe at the rear of the receiving plate.